HOSE FITTING AND DIE FOR PREPARATION

Abstract: A system and method for hydroforming hose fittings (10) for use with hose assemblies (30).

Description: HOSE FITTING AND DIE FOR PREPARATION Background of the Invention This invention relates generally to a hose πs f nMy.pn P 1rt " t10, a hydroformed fitting, and more particularly, to an im roved hγ( r nrmin system and method of using a die to hydroform a hose fitting. Hydroforming, sometimes referred to as fluid forming, was developed during the late 1940s-early '50s in response to a need for a more efficient, cost-effective method of producing metal parts. As a general principle, hydroforming involves application of a predetermined fluid pressure to an area of metal surface to be manipulated. Where the metal surface is a tube, an internal fluid pressure is applied as the tube is bent and stretched. Generally, hydroformation of a tube can be accomplished by filling the tube interior with the fluid, retaining it therein and increasing the internal pressure. Depending upon the die tool utilized, hydroforming can also be used to radially expand the tube. Specific advantages of hyα^ofoπning include: relatively inexpensive tooling, the availability of complex shapes and contours, mώimal material thinout (hydroforming flows the metal rather than stretching it--thinout is usually less than 10%), reduced finishing costs (by comparison, matched die methods of formation can cause scuff marks, shock and stretch lines), and precision with difficult configurations even where high tolerances are required. Typically, fittings manufactured for use in conjunction with hose assemblies are machined at considerable expense. Where a one-piece macliined fitting is not available or is uneconomical, a brazing procedure can be utilized to provide the desired fitting from two components. Inherently, brazing provides a structural weakness which may manifest itself through failure upon application of routine pressure forces. Where one-piece fittings can be machined, they are difficult to bend if a curved configuration is required. Even so, bending introduces material weaknesses and increases the potential for failure at application pressures. There are a considerable number of problems and deficiencies relating to the manufacture of hose fittings and, subsequently, assemblies with such fittings. The search for a cost-efficient and effective alternative to machining has been an on-going concern in the art. There is a need for a system/method, hose fitting and/or assembly which takes advantage of the manufacturing and commercial benefits typically associated with hydroforming. Objects of the Invention. It is an object of this invention to overcome the problems and shortcomings of the prior art, including those described above. Another object of this invention can be to provide a hose assembly prepared using a hydroforming process. It can be another object of the present invention to provide a one-piece hose fitting which is formed unitarily, without brazing, to maintain structural integrity. It can also be an object of this invention to provide a fitting meeting pertinent industry dimensional, design and/or performance specifications or their equivalents, such a fitting as can be hydroformed and/or used in conjunction with a hose assembly also meeting or equivalent to such underlying specifications. It can also be an object of this invention to provide a system for hydroforming, unitarily, a one-piece hose fitting, such a system as can include a die tool and/or a set of dies, as can be used to hydroform a fitting meeting or equivalent to various industry specifications. It can also be an object of the present invention to provide a system having an interchangeable die tool and/or dies such that hose fittings of variable design and dimension can be hydroformed from tubular stock. It can also be an object of this invention to provide a system and/or method for hydroforming a hose fitting for use in conjunction with a securing mechanism, such that a hose can be assembled with such a fitting. It can also be an object of this invention to provide a metallic hose fitting hydroformed such that the fitting is substantially free of machine lines, scuff marks and related surface deformities typically observed as a result of machining or related mechanical/grinding procedures, and substantially without material thinning, allowing for a degree of tMnning inherent to hydroforming processes. It can also be an object of this invention to provide a hose fitting, assembly, system and/or method obviating the need for costly f sliing work on the hose fitting. It will be understood by those skilled in the art that one or more aspects of this invention can meet certain objects, while one or more other aspects can meet certain other objectives. Each objective may not apply equally, in all instances, to every aspect of this invention. As such, the following objects—in light of the prior art regarding hose assemblies, hose fittings and methods for their preparation—can be viewed in the alternative with respect to any one aspect of the present invention. Other objects, features and advantages of the present invention will be apparent from the following summary and description of preferred embodiments, and as such, will be readily apparent to those skilled in the art having knowledge of various hose fittings, assemblies and the requirements for their use in trade and industry. Such objects, features, benefits and advantages will be apparent from the above as taken in conjunction with the accompanying examples, tables, data, figures and all reasonable inferences to be drawn therefrom. Summary of the Invention. This invention includes an improved hose fitting, as well as an assembly for use therewith, together with a system and/or method of preparing such. The invention overcomes certain well-known problems and deficiencies, including those outlined above, while providing a cost-effective alternative to current manufacturing and machining operations. In part, the present invention is a hose assembly, including: (1) a unitary hose fitting hydroformed from a tube and (2) a hose functionally and dimensionally compatible with the hose fitting. Consistent with the benefits available through hydroforming but heretofore unrealized in the context of a hose fitting, application of internal tubular pressure results in a number of structural characteristics not available through use of the prior art, including metal flow without stretching or substantially thinning the metal. In such a way, a one-piece fitting can be unitarily prepared without brazing and without lines or scuff marks or other surface imperfections typically resulting from a machining operation. At least a barb can be incorporated into the fitting configuration, such that the hose component mates with the fitting and engages a barb incorporated therein. In preferred embodiments, the hydroformed hose fitting has at least one portion for attachment of a securing mechanism. In such an embodiment, the assembly also includes a mechanism to secure the hose to the fitting. In highly-preferred embodiments and without limitation, the mechanism can be a ferrule or a clamp. While screw style fittings may be less preferred for certain assemblies or uses, such can also be hydroformed in accordance with this invention providing measures are taken to maintain structural integrity about the thread portion. See, for instance, U.S. Patent No. 5,333,775 referenced below. Likewise, in preferred embodiments, the hydroformed fitting of the assembly has dimensional and performance properties selected from, among other properties, dimensional and performance properties either meeting or equivalent to Society of Automotive Engineers (SAE) J516 standard specifications for hydraulic hose fittings. In a similar fashion, preferred embodiments of the present assembly include those where the hose component has dimensional and performance properties selected from those dimensional and performance properties either meeting or equivalent to SAE J517 standard specifications for hydraulic hoses. Such standard specifications for hydraulic hose and hose fittings, as well as other hose and fitting components, are well-known to those skilled in the art, but heretofore have not been utilized in conjunction with hose fittings, assemblies or their manufacture. Incorporation of such standard specifications will be well-known to those skilled in the art made aware of this invention. The compatibility of the hose component with the inventive fitting of this invention can be in accordance with SAE recommended practice J1273. In particular, pursuant to recommended practice under SAE J1273, the pressure of an assembly system must first be determined. Hose selection is then made so that the recommended maximum operating pressure is equal to or greater than the system pressure. Surge pressure higher than the maximum operating procedure will tend to shorten applicable hose life; accordingly, such pressures must be taken into account in determining compatibility. Other factors include, without limitation: suction (negative pressure), temperature of a fluid passed through the hose, fluid compatibility with the hose and fittings, size of the components as compared to the pressure and rate of flow of the pressurized fluid, the environment (ultraviolet light, ozone, salt water, chemicals, etc.) which can cause degradation, mechanical loads (induced by flexing, twisting, etc.), abrasion and electrical conductivity. Such factors and other related considerations are well-known to those skilled in the art and will be understood as applicable to the present hydroformed hose fittings and their use with hose assemblies, as those individuals are made aware of this invention. Other preferred embodiments of the assembly of this invention include those where multiple barbs are provided on the fitting component. Such barbs can have a variety of configurations, including, without limitation, circumferential edges, squares, beads or a combination of such configurations. Likewise, in preferred embodiments, the fitting of this invention has a uniform wall thickness dimension. Even so, where variations are required, such can be introduced by hydroforaiing the fitting in accordance with the methods and procedures described in United States Patent No. 5,333,775, the entirety of which is incorporated herein by reference. In part, the present invention is an improved hydroforming system. The improvement includes a plurality of dies, but at least first and second opposed dies, removably engaging one another and defining a cavity for placement of tubular stock. Reference is made to several figures described below. Each die has at least one concave portion, and the concave portions are arranged to define a cavity having the design and outer dimensions of a hose fitting. In preferred embodiments, the dies are configured such that the cavity has a design and dimensions meeting SAE J516 standard specifications for hydraulic hose fittings, or a design and dimensions equivalent to such standard specifications. In highly-preferred embodiments, the cavity has a concave portion so as to provide a hose fitting with a configuration engageable with a ferrule. In a similar fashion, with or without such a configuration, a highly-preferred embodiment provides a cavity having a concave portion to provide at least one hose barb on the resultant fitting. In part, the present invention is a method of using a die to manufacture a hose fitting. As described more fully above, such a fitting has a configuration suitable for use with a hose assembly. The inventive method includes: (1) providing a metallic tube, (2) providing a die tool to engage the tube and defining a shaped cavity, (3) contacting the interior of the tube with an expansive material and retaining the material within the tube, (4) increasing the pressure of the expansive material on the tube interior to a predetermined level sufficient to flow the metal component of the tube, and (5) engaging the tube with the aforementioned die tool to form a hose fitting. As can be utilized with the present invention, a tubular blank is filled with a hydroforming fluid, by introduction to a fluid bath, injection or placement of the fluid therein. The ends of the tube can be plugged to retain the fluid witiiin the tube, with the internal pressure thereafter increased to a desired level according to techniques known to those skilled in the art. Either sequentially or contemporaneously therewith, the die tool is brought into engagement with the tube to hydroform a hose fitting having an external configuration and set of outer dimensions defined by and/or corresponding to the shaped cavity. Mechanical and hydraulic components usable with the present method are well-known, as illustrated by the description provided in U.S. Patent No. 5,471,857 which is incorporated herein in its entirety. Other such components or mechanisms can include a cam lock of the sort which could be arranged and configured to be used in conjunction with and/or close the dies of FIGS. 5B and 5C, as described below. In preferred embodiments, engagement of the die tool with a pressurized tube provides a hose fitting with a design and dimensions selected from a group of properties meeting SAE J516 standard specifications for hydraulic hose fittings or, without limitation, properties equivalent to such standard specifications. Alternatively or in conjunction therewith, the engagement results in a dimensional configuration providing a mating relationship with a ferrule. The present method is described above in terms of utilizing a hydraulic fluid. In preferred embodiments, such a fluid is a hydraulic oil of the sort which can be used in hydroforming operations of the prior art. In other embodiments, various other expansive materials can be used, as would be well-known to those individuals skilled in the art and made aware of this invention. Such expansive materials include, without limitation, water, urethane and an explosive. Regardless of the identity or nature of the expansive material, internal pressures of the sort useful with the present invention are preferably at least about 55,000 psi. However, pressures of from less than 5,000 psi to greater than 150,000 psi can be employed, depending at least in part on tubular material choice and desired outer diameter of the resulting hose fitting. Various other pressures and method parameters can be utilized, as required by the particular hose fitting hydroformed and as would be well-known to those skilled in the art having knowledge that such articles can be hydroformed. The method of this invention can be utilized in conjunction with one or more of several additional related steps and/or processes. For instance, a metallic tube can be preformed or swaged, using an automated punch or one of several commercially available swaging machines. See, for instance, U.S. Patent No. 4,662,841 which is incorporated herein in its entirety. Various resulting tubular configurations can result therefrom. In particular and as a preferred embodiment of this invention, a tubular portion eventually hydroformed to provide hose barbs can be preformed in this manner to provide a reduced outside diameter. Without limitation, reference is made to FIG. 6. The preformed and/or swaged tube of FIG. 6 can then be hydroformed as described herein to provide a hose fitting of the type shown in FIG. 7. The method of this invention also contemplates one or more steps or processes after hydroformation. For example, the hose fitting of FIG. 1 can be machined or otherwise manipulated with respect to the portion preformed and/or swaged to widen the inside diameter, if required to improve fluid flow properties. Likewise, without limitation, the fittings of this invention can be heat-treated after hydroformation to improve various physical, structural and/or metallurgical properties. Material expansion is a concern during hyroforming operations. Expansion is limited for a given tubular material having a given starting inner and outer diameters and a desired resulting outer diameter. Further expansion results in an undue material thinning and eventual failure at a certain application pressure. Such expansion and pressure limits can be determined experimentally or via computer simulation. For instance, for a tubular blank of 1010 steel material (0.75-inch diameter and 0.095-inch thickness), it was determined that the limit of outer diameter expansion is about 31%, beyond which there occurs deleterious material thinning. For example and using the above material specifications, a tube blank having a 0.75-inch outer diameter can be appropriately expanded to provide an outer diameter of about 0.984 inches. With respect to the present invention and, in particular with reference to FIG. 1, such an expansion and limit can be most pertinent to the formation of raised portions 12 and the mating relationship with a corresponding coupling mechanism (see, FIG. 4). Brief Description of the Drawings FIGURE 1 is a perspective view of a hose fitting, in accordance with this invention. FIGURE 2 is a schematic view of a die tool configured with a cavity corresponding to the outer dimensions of the fitting of FIG. 1. FIGURE 3 is a perspective partially exploded view of a fitting, of the female 37-degree flared type, in accordance with this invention and SAE standard specification J516. FIGURE 4 is a partial fragmentary view of a hose assembly, in accordance with this invention. FIGURES 5A-5C illustrate schematically by cross-sectional view dies or die segments arranged and configured to provide a hydroforming cavity of the type defining the design and outer dimensions of an inventive hose fitting and/or such a fitting in conformance with pertinent industry dimensional, design and/or performance specifications. FIGURE 6 shows schematically by perspective view a tube or portion thereof, one end of which has been manipulated prior to hydroformation. FIGURE 7 is a perspective view of a hose fitting, in accordance with this invention, hydroformed using the tube/portion of FIG. 6. This view also includes phantom lines showing an internal diameter in part attributable to preformation. FIGURE 8 shows in partial cross-sectional view another hose fitting and configuration, in accordance with this invention. Detailed Description of Preferred Embodiments A representative hose fitting, in accordance with this invention, is shown in FIG. 1. Fitting 10 is configured to provide raised portions 12 with recess 14 therebetween and a plurality of hose barbs 16. The arrangement of portions 12 and recess 14 provide for a mating relationship with a securing mechanism for a hose component, such a mechanism including a ferrule as shown in FIG. 4. Fitting 10 can be hydroformed from tubular stock using die tool 18 defining cavity 20, as shown in the cross sectional view provided by FIG. 2. In preferred embodiments, die tool 18 can comprise first and second opposed dies, 22a and 22b, respectively. Cavity 20 includes at least one concave portion 24. As shown in FIG. 2, the indicated portion defines the design and outer dimensions of one portion 12 of fitting 10. Opposed dies 22a and 22b can also be configured, for instance, to provide a cavity accounting for any preforming or swaging of the type described above. Accordingly, the opposed dies could define the design and outer dimensions of a fitting configured as shown in FIG. 7. As illustrated in FIG. 3, fitting 10 can be angled and/or further manipulated after hydroforming. Fitting 10 can be passed through threaded nut 26 either before or after the angle shown is introduced. Edge 28 is then flared to retain nut 26 along fitting 10. A hose assembly, in accordance with this invention, is illustrated by the partial fragmentary view provided in FIG. 4. Assembly 30 includes hose 32 in conjunction with fitting 34 and secured thereto by mechanism 36. The mating relationship of mechanism 36 and raised portion 38 of fitting 34, together with the grasping action of barbs 40, assure proper function of assembly 30. A number of barb configurations are shown in FIG. 4, starting from left to right: sharp edged, square and beaded. Typically, one circumferential barb configuration will be utilized; however, a combination of barbs can be used with good effect. Fitting 10 can also be hydroformed from tubular stock using die tools 18 such as those shown by representation in FIGS. 5A-C. The die tool shown in the cross-sectional view of FIG. 5 A defines cavity 46 and can comprise, as shown, dies 44a-44d. In FIG. 5B, a plurality of dies 48a-48e define cavity 50. Likewise, the die tool represented in the cross-sectional view of FIG. 5C can comprise opposed dies 52a-52c to define design cavity 54. . As described above, tubular die stock can be preformed to narrow one end thereof. Such preformation can be accomplished by swaging or other mechanical operations using procedures and equipment well known to those skilled in the art. Tubular stock 56 can be configured to have end portion 58, as shown in FIG. 6. For instance, if dimension a is 0.75 inches, dimensions b and c could be 0.66 and 1.50 inches, respectively, by way of providing a useful preformed tube configuration. As illustrated in FIG. 7, the preformed tube of FIG. 6 can be hydroformed to provide fitting 10. The arrangement of portions 12 and recess 14 provide for a mating relationship with a securing mechanism for a hose component. As discussed above, such a mechanism can include, but is not limited to, the ferrule 36 shown in FIG. 4. As best shown in FIG. 7, the ins^diameter of fitting end 58 is somewhat narrowed as a result of the tubular preformation. As discussed above, various mechanical means can be employed to increase the inner diameter of end 58 to provide, if necessary, better flow properties. References made to FIG. 8 as a point of contrast with the hose fitting of FIG. 7. In particular, the arrangement of portions 12 and recess 14 illustrates schematically the modification of the configuration of fitting 10 so as not to exceed either theoretical or empirical material expansion limitations. The arrangement of portions 12 and recess 14 allows for a secure mating relationship with a hose component despite the reduced outer dimensions of portions 12. Examples of the Invention The following non-limiting examples and data illustrate various aspects and features relating to the method, system and resulting fittings and assemblies of this invention, including the surprising and unexpected manufacture of hose fittings using hydroforming technologies. Examples 1-17, below, illustrate hoses of the sort which can be used in conjunction with the fittings and/or assemblies of this invention. The dimensional and design parameters of such hoses will be well known to those skilled in the art made aware of this invention. For instance, the hoses of examples 1-17 are the well-known SAE 100R series hoses (SAE 100R1, etc.), the dimensional and design parameters of which can be found in SAE standard J517. Various performance specifications for such SAE 100R1-15 hoses are also well-known, some of which are summarized in Tables la-b through 3a-b. Example 1 Steel Wire Reinforced, Rubber Covered Hydraulic Hose (SAE 100R1). A hose for use with petroleum base hydraulic fluids within a temperature range of -40 to +100 °C, and with various water base hydraulic fluids. A hose in accordance with this example can have an inner tube of oil-resistant synthetic rubber, a single wire braid reinforcement, and an oil- and weather-resistant synthetic rubber cover. A ply or braid of suitable material may be used over the inner tube and/or over the wire reinforcement to anchor the synthetic rubber to the wire. Alternatively, the same hose may have a cover designed to assemble with fittings which do not require removal of the cover or a portion thereof. Example 2 High-Pressure, Steel Wire Reinforced, Rubber Covered Hydraulic Hose (SAE 100R2). A hose for use with petroleum base hydraulic fluids within a temperature range of -40 to +100 °C, and with various water base hydraulic fluids. A hose in accordance with this example can have an inner tube of oil-resistant synthetic rubber, steel wire reinforcement and an oil- and weather-resistant synthetic rubber cover. A ply or braid of suitable material may be used over the inner tube and/or over the wire reinforcement to anchor the synthetic rubber to the wire. Construction variations consist with this invention are further referenced in SAE Standard J517. Example 3 Double Fiber Braid (Nonmetallic), Rubber Covered Hydraulic Hose (SAE 100R3). A hose for use with petroleum base hydraulic fluids within a temperature range of -40 to +100 °C, and with various water base hydraulic fluids. A hose in accordance with this example can have an inner tube of oil-resistant synthetic rubber, two braids of suitable textile yarn, and an oil- and weather-resistant synthetic rubber cover. Example 4 Wire Inserted Hydraulic Suction Hose (SAE 100R4). A hose for use in low pressure and vacuum applications with petroleum base hydraulic fluids within a temperature range of -40 to +100 °C, and with various water base hydraulic fluids. A hose in accordance with this example can have an inner tube of oil-resistant synthetic rubber, a reinforcement consisting of a ply or plies of woven or braided textile fibers with suitable spiral of body wire, and an oil- and weather-resistant synthetic rubber cover. Example 5 Single Wire Braid, Textile Covered Hydraulic Hose (SAE 100R5). A hose for use with petroleum base hydraulic fluids within a temperature range of -40 to +100 °C, and with various water base hydraulic fluids. A hose in accordance with this example can have an inner tube of an oil-resistant synthetic rubber and two textile braids separated by a high tensile steel wire braid. All braids are impregnated with an oil- and mildew-resistant synthetic rubber compound. Example 6 Single Fiber Braid (Nonmetallic), Rubber Covered Hydraulic Hose (SAE 100R6). A hose for use with petroleum base hydraulic fluids within a temperature range of -40 to +100 °C, and with various water base hydraulic fluids. A hose in accordance with this example can have an inner tube of oil-resistant synthetic rubber, and one braided ply of suitable textile yarn, and an oil- and weather-resistant synthetic rubber cover. Example 7 Thermoplastic Hydraulic Hose (SAE 100R7). A thermoplastic hose for use with petroleum base and synthetic hydraulic fluids within a temperature range of -40 to +93 °C, and with various water base hydraulic fluids. A hose in accordance with this example can have a thermoplastic inner tube resistant to hydraulic fluids with suitable synthetic fiber reinforcement and a hydraulic fluid- and weather-resistant thermoplastic cover. Such a nonconductive hose should be identified with an orange cover and an appropriate lay line, in accordance with Federal Standard 595 A. Such a hose is available for use in applications where there is the potential of contact with high voltage sources. Example 8 High-Pressure Thermoplastic Hydraulic Hose (SAE 100R8). A thermoplastic hose for use with petroleum base and synthetic hydraulic fluids within a temperature range of -40 to +93 °C, and with various water base hydraulic fluids. A hose in accordance with this example can have a thermoplastic inner tube consistent to hydraulic fluids with suitable synthetic fiber reinforcement and a hydraulic fluid- and weather-resistant thermoplastic cover. Such a nonconductive hose, as with the hose of the preceding example, should be identified with an orange cover and an appropriate lay line, in accordance with Federal Standard 595A. Again, such a hose is available for use in applications where there is the potential of contact with high voltage sources. Example 9 High-Pressure, Four-Spiral Steel Wire Reinforced, Rubber Covered Hydraulic Hose (SAE 100R9). A hose for use with petroleum base fluids within a temperature range of -40 to +100 °C, and with various water base hydraulic fluids. A hose in accordance with this example can have an inner tube of oil-resistant synthetic rubber, four-spiral plies of wire wrapped in alternating directions, and an oil- and weather-resistant synthetic rubber cover. A ply or braid of suitable material may be used over the inner tube and/or over the wire reinforcement to enter the synthetic rubber to the wire. Alternatively, such a hose can have a cover designed to assemble with fittings which do not require removal of the cover or a portion thereof. Example 10 Heavy-Duty, Four-Spiral Steel Wire Reinforced, Rubber Covered Hydraulic Hose (SAE 100R10). A section covers hose for use with petroleum base fluids within a temperature range of -40 to +100 °C, and with various water base hydraulic fluids. A hose in accordance with this example can have an inner tube of oil-resistant synthetic rubber, four-spiral plies of heavy wire wrapped in alternating directions, and an oil- and weather-resistant synthetic rubber cover. A ply or braid of suitable material may be used over the inner tube and/or over the wire reinforcement to anchor the synthetic rubber to the wire. Alternatively, such a hose has a cover designed to assemble with fittings which do not require removal of the cover or a portion thereof. Example 11 Heavy-Duty Six-Spiral Steel Wire Reinforced, Rubber Covered Hydraulic Hose (SAE 100R11). A hose for use with petroleum base fluids within a temperature range of -40 to +100 °C, and with various water base hydraulic fluids. A hose in accordance with this example can have an inner tube of oil-resistant synthetic rubber, six-spiral plies of wire wrapped in alternating directions, and an oil- and weather-resistant synthetic rubber cover. A ply or braid of suitable material may be used over the inner tube and/or over the wire reinforcement to anchor the synthetic rubber to the wire. Example 12 Heavy-Duty, High Impulse, Four-Spiral Wire Reinforced, Rubber Covered Hydraulic Hose (SAE 100R12). A hose for use with petroleum base fluids within a temperature range of -40 to +121 °C, and with various water base hydraulic fluids. A hose in accordance with this example can have an inner tube of oil-resistant synthetic rubber, four-spiral plies of wire wrapped in alternating directions, and an oil- and weather-resistant synthetic rubber cover. A ply or braid of suitable material may be used over or within the inner tube and/or over the wire reinforcement to anchor the synthetic rubber to the wire. Example 13 Heavy-Duty, High Impulse, Multiple Spiral Wire Reinforced, Rubber Covered Hydraulic Hose (SAE 100R13). A hose for use with petroleum base fluids within a temperature range of -40 to +121 °C, and with various water base hydraulic fluids. A hose in accordance with this example can have an inner tube of oil-resistant synthetic rubber, multiple-spiral plies of heavy wire wrapped in alternating directions and an oil- and weather-resistant synthetic rubber cover. A ply or braid of suitable material may be used over or within the inner tube and/or over the wire reinforcement to anchor the synthetic rubber to the wire. Example 14 PTFE Lined Hydraulic Hose (SAE 100R14). A hose for use with petroleum base and synthetic base hydraulic fluids within a temperature range of -54 to +204 °C, and with various water base hydraulic fluids. A hose in accordance with this example can have an inner tube of polytetrafluorethylene (PTFE), reinforced with a single blade of 303XX Series stainless steel. Alternatively, such a hose may have the additional feature of an electrical conductive inner surface to preclude build-up of electrostatic charge. MPa TABLE 1a - SUMMARY OF SAE J517 100R-SERIES HOSE MAXIMUM OPERATING PRESSURE PSI Nominal Hose I.D. Size, in 100R1 100R2 100R3 100R4 100R5 100R6 100R7 1/8 3/16 20.7 34.5 10.3 20.7 3.4 20.7 3000 5000 1500 3000 500 3000 1/4 19.0 34.5 8.6 20.7 2.8 19.0 2750 5000 1250 3000 400 2750 5/16 17.2 29.3 8.3 15.5 2.8 17.2 2500 4250 1200 2250 400 2500 3/8 15.5 27.6 7.8 2.8 15.5 2250 4000 1125 400 2250 13/32 15.5 13.8 2250 2000 1/2 13.8 24.1 6.9 12.1 2.8 13.8 2000 3500 1000 1750 400 2000 5/8 10.3 19.0 6.0 10.3 2.4 10.3 1500 2750 875 1500 350 1500 3/4 8.6 15.5 5.2 2.1 2.1 8.6 1250 2250 750 300 300 1250 7/8 7.8 13.8 5.5 1125 2000 800 1 6.9 13.8 3.9 1.7 6.9 1000 2000 565 250 1000 1-1/8 4.3 625 1-1/4 4.3 11.2 2.6 1.4 625 1625 375 200 1-3/8 3.4 500 1-1/2 3.4 8.6 1.0 500 1250 150 1-13/16 2.4 350 2 2.6 7.8 0.7 375 1125 100 2-3/8 2.4 350 2-1/2 6.9 0.4 1000 62 3 0.4 1.4 56 200 02 35 MPa TABLE 1b - SUMMARY OF SAE J517 100R-SERIES HOSE MAXIMUM OPERATING PRESSURE PSI Nominal Hose I.D. Size, in 100R8 100R9 100R10 100R11 100R12 100R13 100R14 1/8 10.3 1500 3/16 34.5 68.9 86.2 10.3 5000 10000 12500 1500 1/4 34.5 60.3 77.6 10.3 5000 8750 11250 1500 5/16 10.3 1500 3/8 27.6 31.0 51.7 68.9 27.6 10.3 4000 4500 7500 10000 4000 1500 13/32 6.9 1000 1/2 24.1 27.6 43.1 51.7 27.6 5.5 3500 4000 6250 7500 4000 800 5/8 19.0 27.6 5.5 2750 4000 800 3/4 15.5 20.7 34.5 43.1 27.6 34.5 5.5 2250 3000 5000 6250 4000 5000 800 7/8 5.5 800 1 13.8 20.7 27.6 34.5 27.6 34.5 5.5 2000 3000 4000 5000 4000 5000 800 1-1/8 4.1 600 1-1/4 17.2 20.7 24.1 20.7 34.5 2500 3000 3500 3000 5000 1-3/8 1-1/2 13.8 17.2 20.7 17.2 34.5 2000 2500 3000 2500 5000 1-13/16 2 13.8 17.2 20.7 17.2 34.5 2000 2500 3000 2500 5000 2-3/8 2-1/2 17.2 2500 3 MPa TABLE 2a - SUMMARY OF SAE J517 100R-SERIES HOSE MINIMUM BURST PRESSURE PSI Nominal Hose I.D. Size, in 100R1 100R2 100R3 100R4 100R5 100R6 100R7 1/8 3/16 82.7 137.9 41.4 82.7 13.8 82.7 12000 20000 6000 12000 2000 12000 1/4 75.8 137.9 34.5 82.7 11.0 75.8 11000 20000 5000 12000 1600 11000 5/16 68.9 117.2 33.1 62.0 11.0 68.9 10000 17000 4800 9000 1600 10000 3/8 62.0 110.3 31.0 11.0 62.0 9000 16000 4500 1600 9000 13/32 62.0 55.2 9000 8000 1/2 55.2 96.5 27.6 48.3 11.0 55.2 8000 14000 4000 7000 1600 8000 5/8 41.4 75.8 24.1 41.4 9.7 41.4 6000 11000 3500 6000 1400 6000 3/4 34.5 62.0 20.7 8.3 8.3 34.5 5000 9000 3000 1200 1300 5000 7/8 31.0 55.2 22.1 4500 8000 3200 1 27.6 55.2 15.5 6.9 27.6 4000 8000 2250 1000 4000 1-1/8 17.2 2500 1-1/4 17.2 44.8 10.3 5.5 2500 6500 1500 800 1-3/8 13.8 2000 1-1/2 13.8 34.5 4.1 2000 5000 600 1-13/16 9.7 1400 2 10.3 31.0 2.8 1500 4500 400 2-3/8 9.7 1400 2-1/2 27.6 1.7 4000 250 3 1.5 5.5 225 800 10 140 MPa TABLE 2b - SUMMARY OF SAE J517 100R-SERIES HOSE MINIMUM BURST PRESSURE PSI Nominal Hose I.D. Size, in 100R8 100R9 100R10 100R11 100R12 100R13 100R14 1/8 82.7 12000 3/16 132.9 275.8 344.7 68.9 20000 40000 50000 10000 1/4 132.9 241.3 310.3 62.0 20000 35000 45000 9000 5/16 55.2 8000 3/8 110.3 124.1 206.8 275.8 110.3 48.3 16000 18000 30000 40000 16000 7000 13/32 41.4 6000 1/2 96.5 110.3 172.4 206.8 110.3 41.4 14000 16000 25000 30000 16000 6000 5/8 75.8 110.3 34.5 11000 16000 5000 3/4 62.0 82.7 137.9 172.4 110.3 137.9 27.6 9000 12000 20000 25000 16000 20000 4000 7/8 24.1 3500 1 55.2 82.7 110.3 137.9 110.3 137.9 24.1 8000 12000 16000 20000 16000 20000 3500 1-1/8 17.2 2500 1-1/4 68.9 82.7 96.5 82.7 137.9 10000 12000 14000 12000 20000 1-3/8 1-1/2 55.2 68.9 82.7 69.0 137.9 8000 10000 12000 10000 20000 1-13/16 2 55.2 68.9 82.7 69.0 137.9 8000 10000 12000 10000 20000 2-3/8 2-1/2 69.0 10000 3 MPa TABLE 3a - SUMMARY OF SAE J517 100R-SERIES HOSE PROOF PRESSURE PSI Nominal Hose I.D. Size, in 100R1 100R2 100R3 100R4 100R5 100R6 100R7 1/8 3/16 41.7 68.9 20.7 41.4 6.9 41.1 10000 10000 3000 6000 1000 6000 1/4 37.9 68.9 17.2 41.4 5.5 37.9 5500 10000 2500 6000 800 5500 5/16 34.5 58.6 16.5 31.0 5.5 34.5 5000 8500 2400 4500 800 5000 3/8 31.0 55.2 15.5 5.5 31.0 4500 8000 2250 800 4500 13/32 31.0 27.6 4500 4000 1/2 27.6 48.3 13.7 24.1 5.5 27.6 4000 7000 2000 3500 800 4000 5/8 20.7 37.9 12.1 20.7 4.8 20.7 3000 5500 1750 3000 700 3000 3/4 17.2 31.0 10.3 4.1 4.1 17.2 2500 4500 1500 600 600 2500 7/8 15.5 27.6 11.0 2250 4000 1600 1 13.8 27.0 7.8 3.4 13.8 2000 4000 1125 500 2000 1-1/8 8.6 1250 1-1/4 8.6 22.4 5.2 2.8 1250 3250 750 400 1-3/8 6.9 1000 1-1/2 6.9 17.2 2.1 1000 2500 300 1-13/16 4.8 700 2 5.2 15.5 1.4 750 2250 200 2-3/8 4.8 700 2-1/2 13.8 0.9 2000 125 3 0.8 2.7 112 400 0J5 70 MPa TABLE 3b - SUMMARY OF SAE J517 100R-SERIES PROOF PRESSURE PSI Nominal Hose I.D. Size, in 100R8 100R9 100R10 100R11 100R12 100R13 100R14 1/8 41.4 6000 3/16 68.9 137.9 172.4 34.5 10000 20000 25000 5000 1/4 68.9 120.6 155.1 31.0 10000 17500 22500 4500 5/16 27.6 4000 3/8 55.2 62.0 103.4 137.9 55.2 . 24.1 8000 9000 15000 20000 8000 3500 13/32 20.7 3000 1/2 48.3 55.2 86.2 103.4 55.2 20.7 7000 8000 12500 1500 8000 3000 5/8 37.9 55.2 17.2 5500 8000 2500 3/4 31.0 41.4 68.9 86.2 55.2 69.0 13.8 4500 6000 10000 12500 8000 10000 2000 7/8 12.1 1750 1 27.6 41.4 55.2 68.9 55.2 69.0 12.1 4000 6000 8000 10000 8000 10000 1750 1-1/8 8.6 1250 1-1/4 34.5 41.4 48.3 13.8 69.0 5000 6000 7000 2000 10000 1-3/8 1-1/2 27.6 34.5 41.4 34.5 69.0 4000 5000 6000 5000 10000 1-13/16 2 27.6 34.5 41.4 34.5 69.0 4000 5000 6000 5000 10000 2-3/8 2-1/2 34.5 5000 3 Example 15 Heavy-Duty, High Impulse, Multiple Spiral Wire Reinforced, Rubber Covered Hydraulic Hose (SAE 100R15). A hose for use with petroleum base fluids within a temperature range of -40 to +121 °C. A hose in accordance with this example can have an inner tube of oil-resistant rubber, multiple spiral plies of heavy wire wrapped in alternating directions and an oil- and weather-resistant synthetic rubber cover. A ply or braid of suitable material may be used over or within the inner tube and/or over the wire reinforcement to anchor a synthetic rubber to the wire. Performance specifications for each nominal SAE 100R15 hose ID size (3/8, 1/2, 3/4, 1, 1-1/4 and 1-1/2 inch): minimum burst pressure, 165.5/24,000 (MPa/psi); proof pressure, 82.7/12,000 (MPa psi); maximum operating pressure, 41.4/6,000 (MPa/psi). Example 16 High-Pressure, Steel Wire Reinforced, Rubber Covered Hydraulic Hose (SAE 100R16). A hose for use with petroleum- and water-base hydraulic fluids within a temperature range of -40 to +100 °C. A hose in accordance with the example as an inner tube of oil-resistant synthetic rubber, steel wire reinforcement according to hose design (one or two braids) and an oil- and weather-resistant synthetic rubber cover. A ply or braid of suitable material may be used over the inner tube and/or over the wire reinforcement to anchor the synthetic rubber to the wire. Various performance specifications for such a hose are as provided below. Nomial SAE Min Max 100R16 Burst Proof Operating Hose ID Pressure Pressure Pressure Size, mm MPa MPa MPa 6.4 137.9 69.0 34.5 7.9 117.2 58.6 29.3 9.5 110.3 55.2 27.6 12.7 96.5 48.3 24.1 15.9 75.8 37.9 19.0 19.0 62.0 31.0 15.5 25.4 55.2 27.6 13.8 31.8 44.8 22.4 11.2 Example 17 Compact 21 MPa Maximum Operating Pressure One and Two Steel Wire Reinforced Rubber Covered Hydraulic Hose With Smaller Bend Radius (SAE 100R17). Hoses of this type are smaller in diameter than one and two braid hoses with similar performance characteristics specified in SAE 100R1 and 100R2 which gives them the ability to operate at smaller bend radii. They are also lighter in weight and their compactness offers advantages when minimal space is available in installations. This hose can be manufactured as either a one braid or two braid design and is identified as to the number of braids. A hose in accordance with this example can have an inner tube of oil resistant elastomer, steel wire reinforcement according to hose design (one or two braids), and an oil- and weather-resistant elastomeric cover. A ply or braid of suitable material may be used over the inner tube and/or over the wire reinforcement to anchor the elastomer. A hose of this sort has a nominal internal diameter from about 6.3mm to 25.0mm, for use with refined petroleum based hydraulic fluids, at temperatures ranging from -40 °C to 100 °C. Such a hose is not suitable for use with castro oil based and ester based fluids. Various performance specifications for such a hose are as provided below. ISO Max Nominal ID Min Burst Proof Operating mm Pressure Pressure Pressure MPa MPa MPa 6.3 84.0 42.0 21.0 8 84.0 42.0 21.0 10 84.0 42.0 21.0 12.5 84.0 42.0 21.0 16 84.0 42.0 21.0 19 84.0 42.0 21.0 25 84.0 42.0 21.0 Examples 18-27 illustrate hose fittings in accordance with this invention and of the type which can be used in conjunction with the hoses and/or assemblies described herein. Example 18 The hydroformed hydraulic hose fitting of this example is a male dry seal type thread tight fitting which can be used with a variety of compatible hoses, including those meeting the dimensional, design and performance specifications for SAE 100R1-100R13 hydraulic hoses, as well-known to those skilled in the art and more fully described in SAE Standard Specifications J517. Such a fitting can be of the (a) permanently attached, (b) field attachable screw, or (c) field attachable segment clamp style, each of which is more fully described by way of design and dimensional specifications in SAE Standard Specification J516. Example 19 The hydroformed hydraulic hose fitting of this example is a male straight thread 0-ring boss type fitting which can be used with a variety of compatible hoses, including those meeting the dimensional, design and performance specifications for SAE 100R1, R2, R5, R7-R10 and 100R12 hydraulic hoses, as well-know to those skilled in the art and more fully described in SAE Standard Specification J517. Such a fitting can be of the (a) permanently attached or (b) field attachable screw style, each of which is more fully described by way of design and dimensional specifications in SAE Standard Specification J516. Example 20 The hydroformed hydraulic hose fitting of this example is a male 37 degree flared type fitting which can be used with a variety of compatible hoses, including those meeting the dimensional, design and performance specifications for SAE 100R1-100R10, 100R12 and 100R13 hydraulic hoses, as well-known to those skilled in the art and more fully described in SAE Standard Specification J517. Such a fitting can be of the (a) permanently attached, (b) field attachable screw or (c) field attachable segment clamp style, each of which is more fully described by way of design and the dimensional specifications in SAE Standard Specification J516. Example 21 The hydroformed hydraulic hose fitting of this example is a female 37 degree flared type fitting which can be used with a variety of compatible hoses, including those meeting the dimensional, design and performance specifications for SAE 100R1-100R13 hydraulic hoses, as well-known to those skilled in the art and more fully described in SAE Standard Specification J517. Such a fitting can be of the (a) permanently attached, (b) field attachable screw, or (c) field attachable segment clamp, (d) option 37 degree radio flare swivel end-45 degree angle, (e) permanently attached with sleeve-45 degree angle, (e) field attachable screw-45 degree angle, (f) permanently attached-90 degree angle short drop, (g) field attachable screw-90 degree angle short drop, (h) permanently attached-90 degree angle long drop, and field attachable screw style-90 degree angle long drop, each of which is more fully described by way of design and dimensional specifications in SAE Standard Specification J516. Example 22 The hydroformed hydraulic hose fitting of this example is a male 45 degree flared type fitting which can be used with a variety of compatible hoses, including those meeting the dimensional, design and performance specifications for SAE 100R1, 100R3 and 100R5-100R7 hydraulic hoses, as well-known to those skilled in the art and more fully described in SAE Standard Specification J517. Such a fitting can be of the (a) permanently attached or (b) field attachable screw style, each of which is more fully described by way of design and dimensional specifications in SAE Standard Specification J516. Example 23 The hydroformed hydraulic hose fitting of this example is a female 45 degree flared type fitting which can be used with a variety of compatible hoses, including those meeting the dimensional, design and performance specifications for SAE 100R1, 100R3, 100R5-100R7 hydraulic hoses, as well- known to those skilled in the art and more fully described in SAE Standard Specification J517. Such a fitting can be of the (a) permanently attached, (b) field attachable screw, (c) permanently attached-45 degree angle, (d) field attachable screw-45 degree angle, (e) permanently attached-90 degree angle short drop, (f) field attachable screw-90 degree angle short drop, (g) permanently attached-90 degree angle long drop and (h) field attachable screw-90 degree angle long drop style, each of which is more fully described by way of design and dimensional specifications in SAE Standard Specification J516. Example 24 The hydroformed hydraulic hose fitting of this example is a male flareless type fitting which can be used with a variety of compatible hoses, including those meeting the dimensional, design and performance specifications for SAE 100R1 and 100R2 hydraulic hoses, as well-known to those skilled in the art and more fully described in SAE Standard Specification J517. Such a fitting can be of the (a) permanently attached or (b) field attachable screw style, each of which is more fully described by way of design and dimensional specifications in SAE Standard Specification J516. Example 25 The hydroformed hydraulic hose fitting of this example is a female flareless type fitting which can be used with a variety of compatible hoses, including those meeting the dimensional, design and performance specifications for SAE 100R1 and 100R2 hydraulic hoses, as well-known to those skilled in the art and more fully described in SAE Standard Specification J517. Such a fitting can be of the (a) optional preset ferrule end construction, (b) permanently attached or (c) field attachable screw style, each of which is more fully described by way of design and dimensional specifications in SAE Standard Specification J516. Example 26 The hydroformed hydraulic hose fitting of this example is a 4-bolt split flange type fitting which can be used with a variety of compatible hoses, including those meeting the dimensional, design and performance specifications for SAE 100R1, 100R2, 100R4, 100R5 and 100R9-100R12 hydraulic hoses, as well-known to those skilled in the art and more fully described in SAE Standard Specification J517. Such a fitting can be of the (a) permanently attached, (b) field attachable screw, (c) field attachable segment clamp, (d) permanently attached-22.5 degree angle, (e) field attachable screw-22.5 degree angle, (f) field attachable segment clamp-22.5 degree angle, (g) permanently attached-30 degree angle, (h) field attachable screw-30 degree angle, (i) field attachable segment clamp-30 degree angle, (j) permanently attached-45 degree angle, (k) field attachable screw-45 degree angle, (1) field attachable segment clamp-45 degree angle, (m) permanently attached-60 degree angle, (n) field attachable screw-60 degree angle, (o) field attachable segment clamp-60 degree angle, (p) permanently attached-67.5 degree angle, (q) field attachable screw-67.5 degree angle, (r) field attachable segment clamp-67.5 degree angle, (s) permanently attached-90 degree angle, (t) field attachable screw-90 degree angle and (u) field attachable segment clamp-90 degree angle style, each of which is more fully described by way of design and dimensional specifications in SAE Standard Specification J516. Example 27 The hydroformed hydraulic hose fitting of this example is a female O-ring face seal type fitting which can be used with a variety of compatible hoses, including those meeting the dimensional, design and performance specifications for SAE 100R1 and 100R12 hydraulic hoses, as well-known to those skilled in the art and more fully described in SAE Standard Specification J517. Such a fitting can be of the (a) permanently attached, (b) field attachable screw, (c) permanently attached-45 degree angle, (d) field attachable screw-45 degree angle, (e) permanently attached-90 degree short drop angle, (f) field attachable screw-90 degree short drop angle, (g) permanently attached-90 degree long drop and (h) field attachable screw-90 degree long drop style, each of which is more fully described by way of design and dimensional specifications in SAE Standard Specification J516. While the principles of this invention have been described in connection with specific embodiments, it should be understood clearly that these descriptions, along with the chosen examples, figures, tables and data contained therein, are made only by way of illustration and are not intended to limit the scope of this invention in any manner. For instance, the systems and methods of this invention can be adapted in a straightforward manner to provide for the manufacture of fuel/oil hose fittings and assemblies, in accordance with SAE standard J30. Likewise, while various dimensional, design and performance specifications have been referenced in conjunction with the SAE standards, the present invention has equal applicability with respect to any corresponding international specifications employed industrially in other jurisdictions, which can be met with equal effect and are to be considered with the present invention. Other advantages and features of the invention will become apparent from the following claims, with the scope thereof determined by a reasonable equivalents, as understood by those skilled in the art.

Claims: In the Claims: 1. A hose assembly comprising a unitary hose fitting hydroformed from a tube to provide upon application of inner tubular pressure and resultant metal flow at least one barb thereon, said fitting substantially without brazing and without a machine line; and a hose functionally and dimensionally compatible with said hose fitting, said hose mating with said hose fitting and engaging said barb. 2. The assembly of Claim 1 wherein said hose fitting further has at least one hydroformed portion for attachment of a securing mechanism. 3. The assembly of Claim 2 further including a mechanism to secure said hose to said fitting. 4. The assembly of Claim 3 wherein said mechanism is selected from the group consisting of a ferrule and a clamp. 5. The assembly of Claim 1 wherein said hose fitting has dimensional and performance properties selected from the group consisting of: dimensional and performance properties meeting SAE J516 standard specifications for hydraulic hose fittings, and dimensional and performance properties equivalent to SAE J516 standard specifications for hydraulic hose fittings. 6. The assembly of Claim 5 where said hose has dimensional and performance properties selected from the group consisting of: dimensional and performance properties meeting SAE J517 standard specifications for hydraulic hoses, and dimensional and performance properties equivalent to SAE J517 standard specifications for hydraulic hoses. 7. The assembly of Claim 1 wherein said compatibility of said hose and said hose fitting is in accordance with SAE recommended practice J1273. 8. The assembly of Claim 1 wherein a plurality of said barbs is selected from the group consisting of circumferential edges, squares, beads and a combination thereof. 9. The assembly of Claim 8 wherein said hose fitting has a uniform wall thickness dimension. 10. In a hydroforming system, the improvement comprising first and second opposed dies removably engaging one another and defining a cavity for placement of tubular stock, said first die having at least one concave portion and said second die having at least one concave portion, said concave portions arranged to define said cavity having the design and outer diameter dimensions of a hose fitting. 11. The system of Claim 10 wherein said cavity has a design and dimensions selected from the group of properties meeting SAE J516 standard specifications for hydraulic hose fittings, and properties equivalent to SAE J516 standard specifications for hydraulic hose fittings. 12. The system of Claim 10 wherein said cavity has a concave portion to provide a hose fitting engagable with a ferrule. 13. The system of Claim 10 wherein said cavity has a concave portion to provide at least one hose barb. 14. A method of using a die to manufacture a hose fitting, said fitting having a configuration suitable for use with a hose assembly, said method comprising: providing a metallic tube; providing a die tool to engage said tube, said tool defining a shaped cavity; contacting the interior of said tube with an expansive material and retaining said material within said tube; increasing the pressure of said material on said tube interior to a predetermined level, said pressure sufficient to flow said metal; and engaging said tube with said die tool to form a hose fitting. 15. The method of Claim 14 wherein engagement of said tool with said tube provides a hose fitting with predetermined design and outer diameter dimensions. 16. The method of Claim 15 wherein said engagement provides a design and dimensions selected from the group of properties meeting SAE J516 standard specifications for hydraulic hose fittings, and properties equivalent to SAE J516 standard specifications for hydraulic hose fittings. 17. The method of Claim 14 wherein said engagement forms a dimensional configuration for a mating relationship with a ferrule. 18. The method of Claim 14 wherein said expansive material is selected from the group consisting of a hydraulic fluid, a urethane and an explosive. 19. The method of Claim 18 wherein said expansive material is a hydraulic oil. 20. The method of Claim 14 wherein said pressure is at least about 55,000 psi.

Inventors: JUEDES MARVIN A, JUEDES, MARVIN, A.
Applicants: JUEDES MARVIN A, JUEDES, MARVIN, A.
Application year: 1999
Main classification: F16L33
IPC codes: B21D15, B21D26, F16L33