Source: http://www.google.com/patents/US7146991?ie=ISO-8859-1&dq=6480844
Timestamp: 2015-01-30 22:15:43
Document Index: 488357347

Matched Legal Cases: ['art.\n3', 'art.\n28', 'arts 25', 'arts 25', 'art 25', 'art 25', 'art 25', 'art 257', 'art 257']

Patent US7146991 - Parts washer system - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsAn industrial parts washer system includes washing fluid, an assembly operable to apply the washing fluid to the part, a turbidity sensor coupled to the assembly operable to sense a condition of the washing fluid after the fluid washes the part, and a control unit connected to the sensor that compares...http://www.google.com/patents/US7146991?utm_source=gb-gplus-sharePatent US7146991 - Parts washer systemAdvanced Patent SearchPublication numberUS7146991 B2Publication typeGrantApplication numberUS 10/342,977Publication dateDec 12, 2006Filing dateJan 15, 2003Priority dateJan 23, 2002Fee statusPaidAlso published asUS20030136424, US20070034237Publication number10342977, 342977, US 7146991 B2, US 7146991B2, US-B2-7146991, US7146991 B2, US7146991B2InventorsDavid L StockertOriginal AssigneeCinetic Automation CorporationExport CitationBiBTeX, EndNote, RefManPatent Citations (98), Non-Patent Citations (1), Referenced by (6), Classifications (22), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetParts washer systemUS 7146991 B2Abstract An industrial parts washer system includes washing fluid, an assembly operable to apply the washing fluid to the part, a turbidity sensor coupled to the assembly operable to sense a condition of the washing fluid after the fluid washes the part, and a control unit connected to the sensor that compares the sensed condition of the washing fluid to a value and thereby determines whether the part should be washed further.
1. An industrial parts washer system operable to wash an industrial part, the parts washer system comprising:
washing fluid;
a flushing assembly operable to apply the washing fluid to the industrial part;
a single turbidity sensor coupled to the assembly operable to sense a condition of the washing fluid after the fluid washes the industrial pad; and
a control unit connected to the sensor, the control unit operably comparing the sensed condition of the washing fluid to a value in order to determine if the industrial part should be washed further, the control unit operably stopping the assembly from flowing the washing fluid to the part, moving the washed part out of the assembly, and moving a subsequent dirty part into the assembly, if the sensed condition of the washing fluid substantially equals the value.
2. The parts washer system of claim 1 wherein the assembly includes:
a seal and flushing device being automatically advanced toward the part; and
an inflow system operable to transport the washing fluid to the flushing device;
the seal operably contacting against the part such that the flushing device operably causes the washing fluid to flow to the part.
3. The parts washer system of claim 2 wherein the assembly further includes an outflow system operable to transport the washing fluid away from the part after the part is washed, and the sensor being coupled downstream of at least a section of the outflow system.
4. The parts washer system of claim 3 wherein the outflow system includes a manifold having multiple inlets, and the sensor is located downstream of the manifold.
5. The parts washer system of claim 1 further comprising a conveyor operably carrying multiples of the part to the assembly in an automatic manner.
6. The parts washer system of claim 5 further comprising:
a filter located downstream of the assembly operably filtering undesired particles from the washing fluid;
a settling tank located downstream of the filter operably removing further undesired particles from the washing fluid; and
a pump operably flowing the fluid from the settling tank to the assembly.
7. The parts washer system of claim 1 wherein the cleaning fluid is a liquid which includes an industrial degreasing detergent.
8. The parts washer system of claim 1 wherein the part is an automotive vehicle powertrain component and the parts washer system cleans the automotive vehicle powertrain component.
9. The parts washer system of claim 8 wherein the part includes an elongated internal passage and the parts washer system provides fluid to flow through the elongated internal passage.
10. The parts washer system of claim 1 wherein the sensor is a particle counter.
11. The parts washer system of claim 1 wherein the assembly flows the fluid to the part without submersing the part in the fluid.
12. The parts washer system of claim 1 further comprising a substantially closed loop system flowing the cleaning fluid to the assembly.
13. The parts washer system of claim 1 wherein the control unit is an electronic control unit.
14. The parts washer system of claim 1 wherein the flushing assembly includes a submersion tank.
15. An industrial parts washer system comprising:
an automotive vehicle, powertrain part;
a flushing assembly operable to apply the washing fluid to the part, the flushing assembly comprising a seal and a flushing device, the seal operably contacting against the part such that the flushing device operably causes the washing fluid to flow to the part;
a turbidity sensor operable to sense a condition of the washing fluid after the fluid washes the part; and
a controller connected to the sensor, the controller automatically evaluating the sensed condition of the washing fluid and determining if the part should be washed further, and the controller outputting historical statistical trends.
16. The parts washer system of claim 15 further comprising an outflow system operable to transport the washing fluid away from the part after the part is washed, and the sensor being coupled downstream of at least a section of the outflow system.
17. The parts washer system of claim 15 further comprising a conveyor automatically carrying multiples of the part to be cleaned by the washing fluid.
18. The parts washer system of claim 15 wherein the flushing assembly includes a submersion tank.
19. The parts washer system of claim 15 further comprising a shuttle operably moveable into and out of a housing, the housing containing the flushing assembly.
20. The parts washer system of claim 15 wherein the part is an engine block.
21. The parts washer system of claim 15 wherein the part is a crankshaft.
22. The parts washer system of claim 15 wherein the seal has a substantially semi-circular part-contacting surface shape.
23. The parts washer system of claim 15 further comprising a cantilevered arm operably pivoting to move at least a portion of the flushing assembly.
24. An industrial parts washer system comprising:
an automotive vehicle part;
a flushing assembly operable to apply the washing liquid to the part;
a shuttle automatically moving the part adjacent to the flushing assembly;
a sensor operable to sense a turbidity condition of the washing liquid; and
an electrical controller connected to the sensor, the controller automatically evaluating the sensed condition of the washing liquid and determining if the part should be washed further;
the controller automatically stopping the flow of washing liquid to the part based at least in-part on the sensed condition of the washing liquid, and thereafter the controller being operable to cause the shuttle to move the part away from the flushing assembly and move a new dirty part adjacent to the flushing assembly to begin a new washing cycle.
25. The parts washer system of claim 24 wherein the assembly further includes an outflow system operable to transport the washing liquid away from the part after the part is washed, and the sensor being coupled downstream of at least a section of the outflow system.
26. The parts washer system of claim 25 wherein the outflow system includes a manifold having multiple inlets, and the sensor is located downstream of the manifold.
27. The parts washer system of claim 24 further comprising a seal having a substantially semi-circular part-contacting surface shape, the seal coupling the flushing assembly to the part.
28. The parts washer system of claim 24 wherein the part includes internal bores, the flushing assembly causing the washing liquid to flow into the bores, the controller determining if one of the bores is undesirably blocked.
29. The parts washer system of claim 24 wherein the flushing assembly includes a submersion tank.
30. The parts washer system of claim 24 wherein the part is an engine block.
31. The parts washer system of claim 24 wherein the part is a crankshaft.
32. The parts washer system of claim 24 further comprising a cantilevered arm operably pivoting to move at least a portion of the flushing assembly.
33. The parts washer system of claim 24 wherein the assembly includes:
a seal and a flushing device being automatically advanced toward the part; and
an inflow system operable to transport the washing liquid to the flushing device;
the seal operably contacting against the part such that the flushing device operably causes the washing liquid to flow to the part; and
the sensor being a turbidity sensor.
BACKGROUND OF THE INVENTION The present invention relates generally to industrial machinery and more specifically to a parts washer system.
Industrial parts washers are commonly used to remove debris, such as machining burrs, grease and dirt, from metallic parts such as engine blocks and crankshafts. Two such conventional devices are disclosed in Canadian Patent No. 669,262 entitled �Washing Apparatus� which issued to Umbricht on Aug. 27, 1963, and United Kingdom Patent No. 817,851 entitled �Improvements in or Relating to Washing Apparatus� which was published on Aug. 6, 1959. Another known industrial parts washer is disclosed in U.S. Pat. No. 3,059,861 entitled �Adjustable Spray Nozzle Assembly� which issued to Umbricht et al. on Oct. 23, 1962, and is incorporated by reference herein. Many traditional industrial parts washers typically flow a cleaning liquid onto the part for a predetermined period of time regardless of how clean the part actually is and regardless of part-to-part variability. Thus, the historical worst case scenario is commonly used to define the future predetermined period for cleaning which often leads to a sometimes slower than necessary process even for parts which are relatively clean after the prior machining operations.
Other cleaning devices are known in different industries as disclosed, for example, in the following U.S. patent application and patents: US 2001/0015096 A1 entitled �Monitoring of Particulate Matter in Water Supply� which was published on Aug. 23, 2001; U.S. Pat. No. 5,647,386 entitled �Automatic Precision Cleaning Apparatus with Continuous On-Line Monitoring and Feedback� which issued to Kaiser on Jul. 15, 1997; and U.S. Pat. No. 5,560,060 entitled �System and Method for Adjusting the Operating Cycle of a Cleaning Appliance� which issued to Dausch et al. on Oct. 1, 1996; all of which are incorporated by reference herein. These conventional devices, however, appear to have little application in the industrial parts industry for cleaning machining burrs and manufacturing plant dirt, especially for large parts having long internal passageways.
SUMMARY OF THE INVENTION In accordance with the present invention, a parts washer system includes a cleaning fluid and a sensor. In another aspect of the present invention, an industrial parts washer includes a housing, a conveyor, a cleaning solution and a particle detector. Still another aspect of the present invention employs a controller which is operable to stop the cleaning of an industrial part if a debris-to-cleaner ratio reaches a target value. A method of operating a parts washer is also provided.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagrammatic view showing the preferred embodiment of a parts washer system of the present invention;
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1, 2, 4 and 6, the preferred embodiment of a parts washer system 21 is used in an industrial manufacturing plant to clean machining burrs, grease, dirt and other manufacturing debris from industrial parts or workpieces such as automotive vehicle powertrain components, including an engine block 23 (see FIG. 1), a metallic crankshaft 25 (see FIGS. 4 and 6), or the like. Parts washer system 21 operates as a cleaning station after a machining station (not shown) where the part has elongated internal pasageways or other features added by a milling machine, lathe, or similar automatic tools. Parts washer system 21 includes a sheet metal housing 27 affixed to the factory floor. Housing 27 essentially encloses the parts cleaning station yet has an entryway 29 for allowing access entry and exit by a horizontally moving shuttle 31 or other type of automatically operating conveyor. Shuttle 31 has a pair of parallel rails 33 upon which are mounted spaced apart perches 35 for carrying a set of parts 25 into the housing. A vertically movable access door (shown in a raised position in FIG. 2) is lowered after shuttle 31 moves inside housing 27.
FIGS. 4�8 show the internal components of parts washer system 21 for use with the crankshaft-type parts 25. A programmable logic controller (�PLC�) first causes shuttle 31 to be automatically moved inside housing 27 to align each part 25 with a corresponding seal and flush unit 51. Seal and flush unit 51 includes a set of offset and parallel upper seals 53 having a generally semi-circular contacting surface shape made from a polymeric material such as polypropylene, polyurethane or nylon. Each upper seal 53 is affixed to a seal support 55 which has hollow bores to allow for internal fluid flow from an attached upper manifold 57. A flexible in-flow pipe or hose 59 is coupled to upper manifold 57 whereby clean washing fluid sequentially flows through in-flow pipe 59, through upper manifold 57, through upper seal supports 55, around a concave cross-sectional channel within the semi-circular contacting surface of each upper seal 53, which then contacts and seals against an upper matching surface of part 25. Each seal and flush unit 51 further includes a set of lower seals 61 and hollow seal supports 63 which are all in communication with and coupled to an outflow manifold 65. Lower seals 61 serve to collect the washing fluid that has been transmitted through the outside surface and internal passages in part 25 and then transfer the now dirty washing fluid to the outflow manifold 65.
Reference should now be made to FIGS. 1, 3, 7 and 8. A particle counter-type turbidity sensor 101 is coupled to an outflow pipe 103 which is, in turn, coupled to a downstream end of outflow manifold 65. One satisfactory particle counter sensor 101 is a model 215W Liquidborne Laser particle counter which can be obtained from Met One of Grants Pass, Oreg. Such a particle counter sensor includes a water weir flow controller 105, a sensor 107, an electrical module 109 for power and communications, an adapter 111, personal computer 93 for real-time sensing, data processing, storing and outputting particle counting data from the out flowing cleaning fluid and for comparing the actual sensed readings to either predetermined targets (representing a satisfactory cleaning fluid value or range) or previously sensed values thereby optimizing and controlling each washing cycle based on these real-time sensed values relative to the target values. In other words, the parts washer system performs by: (a) removing debris from a first machined workpiece by washing the first workpiece with a cleaning liquid; (b) sensing the cleanliness of the solution after workpiece washing; (c) communicating a signal of the sensed value to an electronic control unit; (d) automatically comparing the signal to a predetermined or target value; (e) determining the amount of debris in the liquid; (f) removing at least some of the debris from the liquid; (g) automatically varying a fluid flow characteristic of the liquid if the sensed value is substantially the same or different as compared to the predetermined value, wherein the characteristic includes, but is not limited to, re-using the liquid to subsequently remove debris from the same workpiece if the values are different, or automatically terminating the fluid flow and cleaning of the first workpiece if the sensed value of the liquid reaches the target debris-free value; (h) automatically removing the workpiece from the washer if the sensed value is substantially the same as the predetermined value; and (i) reusing the liquid to subsequently remove debris from additional workpieces. Furthermore, computer 93 stores, calculates and outputs historical statistical trends based on sensed cleaning fluid readings; this can include standard deviation and averaging calculations. Additionally, computer and particle counter sensor 101 can provide an output as to the filtering success for various desired time periods for the recycled cleaning fluid, in order to inform the operator as to when filter cleaning, cleaning fluid disposal or other maintenance may be desired in order to further optimize the process. The computer and particle counter sensor are further able to sense and calculate the cleanliness of the prior machining operations through sensed values and even if part aperture blockages have occurred as will be discussed in more detail with various of the alternate embodiments.
FIG. 1 shows the remainder of the parts washer system 21 fluid flow outside of the housing. A �dirty� settling tank 121 is connected to the downstream end of outflow pipe 103. A motor and pump 123 serve to pump cleaning fluid from tank 121 to a pre-filter separator 125 by way of another pipe 127. Pre-filter separator 125 employs an approximately 75 micron filtering system. Machining chips, debris and other settled out or filtered out particulate matter is then moved and discarded by way of a conventional chip drag and chip waste mechanism 129. A final filter assembly 131 is disposed downstream of pre-filter separator 125 to further filter out undesired particles and debris from the cleaning fluid by use of an approximately 50 micron filtering system. Final filter assembly 131 includes a media filter while pre-filter 125 employs a centrifugal filter. A �clean� settling tank 133 is located downstream of final filter assembly 131 and further allows for holding of the cleaning fluid for subsequent washing while allowing some additional particulate settling. Settling tank 133 includes a weir 135, an overflow pipe 137 and a cleaning drain 139. Another pump and motor 141 serve to flow the cleaning fluid from settling tank 133 to the part washing station within housing 27 when energized by the controller. It should be appreciated, however, that many other filtering and settling components can be used in place of or in addition to those disclosed herein. Notwithstanding, it is highly desirable to employ a closed loop and recyclable cleaning fluid system in order to reduce disposal costs and to save on cleaning fluid expense. The cleaning fluid is preferably a water borne, alkaline liquid solution containing a degreaser and a detergent. It is also envisioned that an electrolyte solution including disodium phosphate, sodium bicarbonate and water can be employed; such a solution is disclosed in U.S. Pat. No. 6,264,823 entitled �Non-Caustic Cleaning of Conductive and Non-Conductive Bodies� which issued to Hoffmann, Jr. et al. on Jul. 24, 2001, and is incorporated by reference herein.
FIG. 9 illustrates a first alternate embodiment of a parts washer system 251 of the present invention. An in-flow pipe 253 and sealing unit 255 are automatically moved to contact and seal against a first side of an oil gallery, including a crankshaft bore, rocker arm paths, piston cylinder bores and the like, of an automotive vehicle engine block part or workpiece 257. At an opposite end of the oil gallery of engine block 257, an outflow pipe 259 and a corresponding sealing unit 261 are automatically moved to interface with part 257. This occurs within a housing of a parts washing station such as in the closed loop system of FIG. 1. A particle counter sensor 263 is coupled to outflow pipe 259 and an electrical control unit 265 is electrically connected to particle counter sensor 263. Thus, �clean� cleaning fluid automatically flows into the upstream side of part 257 and then exits as �dirty� cleaning fluid containing debris through outflow pipe 259. At this point, particle counter sensor 263 senses the concentration of debris within the cleaning fluid and sends a corresponding signal to controller 265 for processing of this information and comparing the real-time sensed values to the target cleaning fluid particulate concentration values in order to further control the cleaning cycle time.
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KgDishwasher having a turbidity sensor* Cited by examinerClassifications U.S. Classification134/57.00R, 134/111, 134/131, 134/184International ClassificationC23G3/00, B08B3/00, C23G1/36, B08B3/02, B08B3/14, B08B9/00Cooperative ClassificationB08B3/14, C23G1/36, C23G3/00, B08B9/00, B08B3/00, B08B3/02European ClassificationB08B3/00, C23G1/36, B08B3/02, B08B9/00, C23G3/00, B08B3/14Legal EventsDateCodeEventDescriptionApr 1, 2014FPAYFee paymentYear of fee payment: 8Apr 26, 2010FPAYFee paymentYear of fee payment: 4Jun 26, 2007CCCertificate of correctionJan 15, 2003ASAssignmentOwner name: CINETIC AUTOMATION CORPORATION, MICHIGANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:STOCKERT, DAVID L.;REEL/FRAME:013672/0279Effective date: 20030113RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services