Abstract:
The description shows a collet chuck 303 for clamping a tool for the purpose of machining a workpiece, comprising: a cutout for receiving a collet 301, wherein the collet chuck 303 has a cutting edge 306 for machining the workpiece.

Description:
AREA OF THE INVENTION 
       [0001]    The present invention relates to a collet chuck for clamping a tool for machining a work piece, a collet for clamping the work piece, and a progressive die for machining a work piece. 
       BACKGROUND OF THE INVENTION 
       [0002]    Known in prior art are chucks for receiving collets for clamping work pieces, for example mills, drills, reamers, and countersinks. Using collets for clamping work pieces results in a high true running accuracy, even at high speeds for the tools. 
       SUMMARY OF THE INVENTION 
       [0003]    Machining a work piece in several sequential working operations requires a certain machining time. One way to reduce this machining time can involve simultaneously implementing previously sequential working operations. 
         [0004]    Therefore, the object is to provide a possible way of machining a work piece by means of tools clamped with collets, wherein, if several working operations are required, the goal is to allow these working operations to chronologically overlap or intersect. 
         [0005]    Provided as a first embodiment of the invention is a collet chuck for clamping a tool for machining a work piece, comprising: A cutout for receiving a collet, wherein the collet chuck exhibits a cutting edge for machining the work piece. 
         [0006]    The cutting edge of the collet chuck can consist of PKD or CBN, and be soldered onto or into the collet chuck. In an alternative embodiment, the cutting edge can be designed as a removable disk. 
         [0007]    Arranging one, two or however many cutting edges desired on a collet chuck makes it possible to set up a progressive die, so that previously sequential working operations can be executed in such a way as to chronologically overlap. 
         [0008]    Provided as a second embodiment of the invention is a collet for clamping a tool, wherein the collet is suitable for insertion into a collet chuck according to one of claims  1  to  3 , wherein the collet can be moved along the longitudinal axis of the collet chuck to vary the radial distance between the cutting edge and longitudinal axis. 
         [0009]    According to the invention, a collet can be designed in such a way as to perform a dual function. On the one hand, a collet according to the invention can be used for clamping a machining tool, for example a drill, a mill, a reamer or a countersink, so that a high true running accuracy can be ensured, even at high speeds. On the other hand, the collet can be designed as an expanding tool, making it possible to vary the cutting edges of a collet chuck in terms of its radial distance from the longitudinal axis of the collet chuck with the collet inserted. As a result, the radial position of the cutting edges of the collet chuck can be finely adjusted. 
         [0010]    Provided as a third embodiment of the invention is a progressive die for machining a work piece, comprising: A tool for machining, a collet according to claim  4 , and a collet chuck according to one of claims  1  to  3 , wherein the tool can be clamped into the collet chuck by means of the collet. 
         [0011]    Provided as a fourth embodiment of the invention is a bushing to be pulled onto a collet chuck, wherein the bushing exhibits one or however many cutting edges desired and/or one or however many T-slots desired. 
         [0012]    A bushing to be pulled on provides an easy way to make a cutting head out of a chuck, so that a progressive die can be generated. 
         [0013]    Exemplary embodiments are described in the dependent claims. 
         [0014]    Provided in an exemplary embodiment is a collet chuck, wherein a cutting edge is situated in proximity to the cutout. 
         [0015]    Arranging the cutting edge in a front region of the collet chuck makes it possible to relatively extensively chronologically overlap two machining processes, so that the machining time for a work piece can be shortened. 
         [0016]    Provided in another embodiment according to the invention is a collet chuck, wherein the cutting edge is a cutting insert, in particular a replaceable cutting insert, and/or wherein the cutting edge is triangular or quadrangular in design. 
         [0017]    The advantage to a cutting insert is that it can be replaced, so that the operational capability of the collet chuck can be restored more quickly given worn cutting edges. Replaceable cutting inserts, whether triangular or quadrangular, can further shorten the period for restoring operational capability. 
         [0018]    Another exemplary embodiment of the present invention provides a progressive die, wherein the collet has a fragile design. 
         [0019]    A “fragile” design makes it possible to “create space” for arranging one or however many cutting edges and/or T-slots desired on a corresponding collet chuck or progressive die. 
         [0020]    Provided according to an exemplary embodiment of the invention is a progressive die, wherein the collet can be shifted along a longitudinal axis of the progressive die to vary the radial distance between the cutting edge and the longitudinal axis. 
         [0021]    A collet designed as an expanding tool enables a fine adjustment of the radial position of the cutting edges arranged on the collet chuck. 
         [0022]    Provided in another embodiment according to the invention is a progressive die, wherein the progressive die encompasses a sleeve, wherein the sleeve is situated between the collet and collet chuck. 
         [0023]    A sleeve between the collet and collet chuck enables a finer adjustment of the radial distance between the cutting edge and the longitudinal axis of the progressive die on the collet chuck, since the sleeve permits a gradual sliding from the collet to the collet chuck. 
         [0024]    Provided according to another exemplary embodiment of the present invention is a progressive die, wherein the sleeve consists of copper, brass, plastic, rubber or some other type of plastic material. 
         [0025]    Designing the sleeve out of copper, brass, plastic, rubber or some other type of plastic material enables a particularly fine adjustment, since the copper, brass, plastic, rubber or other type of plastic material allows the collet to “slide” in the collet chuck to an especially great extent. 
         [0026]    It may be regarded as one idea of the invention to design a collet in such a way, specifically to be fragile, as to leave enough space in the front region of the collet chuck to accommodate one or more cutting edges. In another embodiment, the collet can also be used to vary the cutting edges in terms of their radial distance from the longitudinal axis of the collet chuck. 
         [0027]    Of course, the individual features can be combined with each other, which can in part also yield advantageous effects going beyond the sum of individual effects. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0028]    Additional details and advantages of the invention become evident based on the exemplary embodiments depicted in the drawings. Shown on: 
           [0029]      FIG. 1  is a side view of a rotatable collet chuck according to the invention; 
           [0030]      FIG. 2  is a front view of the rotatable collet chuck from  FIG. 1 ; 
           [0031]      FIG. 3  is another rotatable collet chuck with a collet; 
           [0032]      FIG. 4  is a collet; 
           [0033]      FIG. 5  is a front view of the collet; 
           [0034]      FIG. 6  is another rotatable collet chuck with a clamped-in reamer; 
           [0035]      FIG. 7  is a front region of a collet chuck; 
           [0036]      FIG. 8  is another front region of a collet chuck; 
           [0037]      FIG. 9  is a longitudinal section of a collet chuck with a collet; 
           [0038]      FIG. 10  is a longitudinal section of a progressive die; 
           [0039]      FIG. 11  is a longitudinal section of a collet chuck; 
           [0040]      FIG. 12  is a longitudinal section of a collet; 
           [0041]      FIG. 13  is a longitudinal section of another collet chuck with a collet; 
           [0042]      FIG. 14  is a longitudinal section of another collet chuck with a collet; 
           [0043]      FIG. 15  is a bushing according to the invention to be pulled onto another collet chuck. 
       
    
    
     DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS 
       [0044]      FIG. 1  shows a rotatable cutting tool with a cutting head  104 , wherein the cutting head  104  can exhibit cutting edges  102 , which can be designed as cutting inserts, and T-slots  101 . The rotatable cutting tool is provided with a hollow shank taper intersection  103  to enable coupling to a motor spindle. The cutting tool can exhibit a front cutout for receiving a collet. Therefore, the cutting tool can be used as a collet chuck, wherein a progressive die can be fabricated while clamping a milling tool, for example, into the cutting tool by means of a collet. In an alternative embodiment, a collet according to the invention can be “narrower”, or “less meaty”, or less stable in design, i.e., fragile, meaning that the thickness of the material of the collet from the inner radius to the outer radius is smaller by comparison to collets in prior art, making it possible to open up installation space on the collet chuck. As a result, cutting inserts and T-slots can be arranged on the collet chuck, so that a progressive die can be obtained. The cutting edges  102  can consist of PKD or CBN, and be soldered onto or into the cutting head  104 . In an alternative embodiment, the cutting edges  102  can be designed as removable disks. 
         [0045]      FIG. 2  shows a rotatable cutting tool with a cutting head  201 , wherein the cutting head  201  can exhibit cutting edges that can be molded on as cutting inserts  202 . Also depicted is a cutout  203 , into which a collet can be inserted. 
         [0046]      FIG. 3  shows a cutting system with a collet chuck  303 , which simultaneously can be used as a cutting tool, wherein the collet chuck  303  can provide cutting inserts  306  and T-slots  302  for machining a work piece. The collet chuck  303  can exhibit a cutout, into which a collet  301  can be introduced. The collet  301  is used to be able to clamp in a tool, for example a drill, a mill, a reamer or a countersink or some other tool. Further depicted is a gap  310 , which can be at least partially compressed while clamping in an inserted tool. 
         [0047]      FIG. 4  shows a side view of a collet, wherein a tool, for example a drill, a mill, a reamer, a countersink or some other tool, can be introduced into the collet from the right. The collet exhibits a male thread  401  for fixation inside a collet chuck and a cylindrical section  403 . Further depicted is a gap  404 , which can be at least partially compressed while clamping in an inserted tool. 
         [0048]      FIG. 5  shows a front view of a collet with a cutout  502 , into which a tool, for example a drill, a mill, a reamer, a countersink or some other tool, can be inserted, and gaps  501  that can be compressed, making it possible to clamp in the inserted tool. Further depicted is an inner radius  503  and an outer radius  504 . According to the invention, the selected difference between the outer radius  504  and inner radius  503  can be relatively small by comparison to collets in prior art, so that the cutout for receiving the collet in a corresponding collet chuck can also be small. As a result, an unobstructed location or space can be obtained on the collet chuck, which can be used for arranging cutting edges and/or T-slots. Therefore, a more fragile embodiment of a collet makes it possible to design a collet chuck as a cutting head. In alternative embodiments, a collet can exhibit four gaps  501  or three gaps. 
         [0049]      FIG. 6  shows a progressive die, wherein a tool  601 , for example a reamer, is situated in a collet, and the collet is clamped in a collet chuck  602 . According to the invention, the collet chuck  602  exhibits one or more cutting edges, e.g., cutting inserts, in particular replaceable cutting inserts. Therefore, the collet chuck  602  is designed as a cutting tool according to the invention, so that a progressive die can be obtained overall. 
         [0050]      FIG. 7  shows a front region of a collet chuck with a cutout  702  for collets, wherein the collet chuck can exhibit cutting edges  701  according to the invention. 
         [0051]      FIG. 8  shows a front region of a collet chuck with a cutout  804  for receiving collets, wherein the collet chuck can exhibit cutting edges  803  and T-slots  801 . Further depicted is a coolant channel  802  for supplying the cutting edge  803  with coolant and/or lubricant. 
         [0052]      FIG. 9  shows a cutting system with a cutting head  919 , which can be used as a collet chuck, and a collet  918 . The collet  918  can be used as an expanding tool. The expanding tool  918  can here exhibit an outer cone  916 , which can abut against an inner cone  917  of the cutout of the cutting head  919 . If the cutting tool/collet  918  is pulled further into the collet chuck/cutting head  919 , the radial distance  920  between the cutting edges  915  or cutting inserts and the longitudinal axis  921  situated on the cutting head/collet chuck  919  can be varied, specifically increased. If the collet  918  is shifted further to the left, i.e., removed from the cutout of the cutting head  919 , the radial distance  920  between the cutting edges  915  and the longitudinal axis  921  can be diminished. In this way, the radial distance  920  between the cutting edges  915 /cutting inserts/T-slots  901  and the longitudinal axis  921  can be calibrated (finely adjusted). 
         [0053]    The expanding tool  918  can further exhibit a male thread  911 , whose teeth can engage into teeth of a female thread  910 . The female thread  910  can be arranged on a worm wheel  909 , wherein the worm wheel  909  can be part of a worm gear. The worm gear can encompass the worm wheel  909  with teeth  908 ,  912  and a worm  905 , wherein the teeth of the worm  905  can engage into the teeth  908 ,  912  of the worm wheel  909 . The worm gear can be mounted inside the cutting head  919  by way of roller bearings  904 ,  907 ,  913 ,  914 , wherein the roller bearings  904 ,  907 ,  913 ,  914  can be designed as ball bearings. For example, the worm  905  can exhibit a hexagon socket (Allen)  906 , a recess, a cross recess, a Torx, a square box or some other intermeshing option. For example, a socket wrench can be inserted into the mesh  906  of the worm  905 , wherein the worm  905 , and hence also the worm wheel  909 , can be rotated or made to rotate by turning the socket wrench. As a result, the expanding tool  918  can be removed toward the left or inserted toward the right, wherein the outer cone  916  of the expanding tool  918  can be pressed against the inner cone  917 , making it possible to enlarge the radial distance  920  between the cutting insert  915  and the longitudinal axis  921 . The edge  922  of the worm wheel  909  can be used as a stop for the cylindrical section  903  of the expanding tool  918 , so as to prevent an overexpansion of the cutting head  919  and a potential breakage. The edge  923  of the worm wheel  909  can be used as a stop for the projection of the expanding tool  918  with its male thread  911 . Given the arrangement of a worm gear with its worm wheel  909  and the worm  905 , no torque is transmitted to the expanding tool  918 . For this reason, the expanding tool  918  can also not end up rotating around its longitudinal axis  921 . This eliminates the need for a locking device to prevent oration. 
         [0054]    In an alternative embodiment in which additional circumstances make it possible to transmit a torque to the expanding tool  918 , a locking device can be situated on the cutting system by virtue of the fact that a pin projects into the recess of the cutting head  919 , and can be guided into a groove arranged on the expanding tool  918 . This makes it possible to prevent the expanding tool  918  from rotating around its own longitudinal axis  921 . 
         [0055]      FIG. 10  shows a stepped reamer with first cutting inserts  1008  and second cutting inserts  1009 . The reamer  1001  is here clamped into the collet chuck  1007  by means of the collet  1010 , wherein the collet chuck  1007  can also exhibit cutting edges  1008  and T-slots, so that the collet chuck  1007  can also act as a cutting head  1007 . The collet  1010  can also be used as an expanding tool, so that the radial distance between the cutting edges  1008  of the cutting head  1007  can be adjusted (calibrated). 
         [0056]    The radial distance between the first cutting inserts  1008  and the longitudinal axis of the cutting head  1007  can be adjusted with the expanding tool  1010 , wherein the expanding tool  1010  can be moved to the left or right by means of a worm gear having a worm wheel  1006  and a worm  1004 . If the expanding tool  1010  is moved to the right, the cutting inserts  1008  can be pressed further radially outward. Aside from an outer cone  1002  and a cylindrical section  1003 , the expanding tool  1010  can exhibit another cutting head  1001  with additional cutting inserts  1009 , so that a two-step reamer can be realized, for example. In an alternative embodiment, another expanding tool with even more reamers can be inserted into the additional reamer, thereby enabling a 3-step reamer. The additional expanding tool can also be designed as a collet. In further alterative embodiments, reamers with as many steps as desired can be provided. 
         [0057]      FIG. 11  shows a longitudinal section of the cutting head  1007  on  FIG. 10 , wherein the cutting head in an alternative embodiment exhibits a cutout  1103 , which can encompass an inner cone  1101  and a cylindrical section with a female thread  1102 , into which a collect can be inserted. 
         [0058]      FIG. 12  shows an expanding tool  1201  with an outer cone  1203  and a cylindrical section with a male thread  1202 , wherein the expanding tool  1201  can be inserted into the cutout  1103  of the cutting head on  FIG. 11 . The male thread  1202  of the expanding tool  1201  can be screwed into the female thread  1102  of the cutting head on  FIG. 11 , so that the outer cone  1203  can come to lie against the inner cone  1101 . The cutting head can be expanded by further screwing the expanding tool  1201  into the cutout  1103  of the cutting head on  FIG. 11 . The right end of the expanding tool  1201  can exhibit a mesh, e.g., for a socket wrench, so that the expanding tool  1201  can be screwed into the cutting head on  FIG. 11 , wherein the mesh can be designed as a hexagon socket, for example. In an alternative embodiment, the cutting head of the first step, second step, several steps or all steps in a stepped reamer or some other progressive die can be expanded with an expanding tool according to  FIG. 12 , wherein the expanding tool can also be designed as a collet according to the invention. 
         [0059]      FIG. 13  shows an alternative embodiment of the invention with a threaded bolt  1305  having a differential thread (differentiated thread) on which are located two regions with varying threads  1303 ,  1306 . A first male thread  1306  of the threaded bolt  1305  can engage into a matching female thread  1307  of an expanding tool/a collet  1308 , and a second male thread  1303  of the threaded bolt  1305  can engage into a matching female thread  1302  of the cutting head  1301 . The male threads  1303 ,  1306  can exhibit varying pitches. The threaded bolt  1305  can exhibit a hexagon socket  1304 , into which a socket wrench can engage, for example. Due to the differing thread types, turning the socket wrench leads to a purely translatory movement of the expanding tool  1308  in the direction of the longitudinal axis of the expanding tool  1308  (no rotation of the expanding tool  1308  around its own axis). 
         [0060]      FIG. 14  shows another alternative embodiment of an expanding tool  1407 /a collet in a cutting head  1401 , wherein the male thread  1408  of a threaded bolt  1402  can engage into the female thread  1404  of the cutting head  1401 . The threaded bolt  1402  can exhibit a head  1406  that can be mounted in a cutout of the expanding tool  1407 , wherein the head  1406  can be mounted in such a way that the head  1406  can freely rotate inside the cutout. A projection  1405  makes it possible to prevent the head  1406  from jumping out of the cutout. In an alternative embodiment, the head  1406  can be designed as a nose and/or rod-shaped, wherein the head  1406  is always configured in such a way that the projection  1405  can prevent the head  1406  from moving out of the cutout of the expanding tool  1407 . The threaded bolt  1402  can exhibit an intermeshing hexagon socket for a socket wrench, wherein the socket wrench can be used to turn the threaded bolt  1402 . A rotational motion of the threaded bolt  1402  can lead to a purely translatory movement of the expanding tool  1407  in the direction of the longitudinal axis of the expanding tool  1407 , wherein the expanding tool  1407  does not have to rotate due to how the head  1406  is mounted inside the cutout of the expanding tool  1407 , which can enable the head  1406  to rotate as desired without taking along the expanding tool  1407 . 
         [0061]      FIG. 15  shows a collet chuck with a receptacle  1504  for collets, which exhibits a mesh  1505 , e.g., for a socket wrench, for tightening an inserted collet. A bushing  1503  according to the invention can be pulled onto the receptacle  1504  of the collet chuck (see arrows  1507 ,  1508 ), wherein the bushing  1503  can exhibit one or more cutting edges  1502  and/or one or more T-slots  1501 . 
         [0062]    In another embodiment of the invention, a sleeve can be provided between the hollow shank taper of the cutting head/collet chuck and outer cone of the expanding tool/collet, wherein the sleeve can help improve how the expanding tool and cutting head are able to slide. This enables a more precise and reproducible adjustment of the radial distance between the cutting inserts and the longitudinal axis of the tool. In particular, this makes it possible to prevent the outer cone from hooking the hollow shank taper of the cutting head, so that jerky movements between the expanding tool and cutting head can be avoided. The sleeve can consist of a material that is harder or softer by comparison to the outer cone and/or cutting head. In particular, the sleeve can consist of copper, brass, plastic, rubber or some other type of plastic material. An especially good sliding of the expanding tool and cutting head can be enabled in particular by the selection of sleeve material, wherein copper, brass, plastic, rubber or some other type of plastic material appear to be especially advantageous in this connection. Increasing the conical outer or inner lateral surface of the sleeve also makes it possible to determine how fine or strong a change can be made in the radial distance between the cutting edges of the cutting head and the longitudinal axis. If the outer or inner taper angle is small, a very fine adjustment is possible. A larger taper angle enables a coarse adjustment. 
         [0063]    Let it be noted that the term “encompassing” does not preclude other elements or procedural steps, just as the terms “an” and “a” do not rule out several elements and steps. 
         [0064]    The used references serve only to enhance understandability, and are in no way be construed as limiting, wherein the claims reflect the protective scope of the invention. 
       LIST OF REFERENCE NUMBERS 
       [0065]      101  T-slot 
         [0066]      102  Cutting edge 
         [0067]      103  Hollow shank taper interface 
         [0068]      104  Collet chuck 
         [0069]      105  Mesh for socket wrench 
         [0070]      201  Collet chuck 
         [0071]      202  Cutting edge 
         [0072]      203  Cutout for receiving a collet 
         [0073]      301  Collet 
         [0074]      302  T-slot 
         [0075]      303  Collet chuck 
         [0076]      304  Hollow shank taper interface 
         [0077]      305  Longitudinal axis 
         [0078]      306  Cutting edge 
         [0079]      307  Male thread 
         [0080]      308  Cylindrical section 
         [0081]      309  Outer cone 
         [0082]      310  Gap 
         [0083]      401  Male thread 
         [0084]      402  Outer cone 
         [0085]      403  Cylindrical section 
         [0086]      404  Gap 
         [0087]      501  Gap 
         [0088]      502  Cutout for receiving a tool 
         [0089]      503  Inner radius 
         [0090]      504  Outer radius 
         [0091]      601  Tool 
         [0092]      602  Collet chuck 
         [0093]      603  Hollow shank taper interface 
         [0094]      604  Cutting edge 
         [0095]      701  Cutting edge 
         [0096]      702  Cutout for receiving a collet 
         [0097]      703  Longitudinal axis 
         [0098]      801  T-slot 
         [0099]      802  Coolant channel 
         [0100]      803  Cutting edge 
         [0101]      804  Cutout for receiving a collet 
         [0102]      901  T-slot 
         [0103]      902  Cutting head 
         [0104]      903  Cylindrical section 
         [0105]      904  Roller bearing 
         [0106]      905  Worm 
         [0107]      906  Hexagon socket 
         [0108]      907  Roller bearing 
         [0109]      908  Teeth 
         [0110]      909  Worm wheel 
         [0111]      910  Female thread 
         [0112]      911  Male thread 
         [0113]      912  Teeth 
         [0114]      913  Roller bearing 
         [0115]      914  Roller bearing 
         [0116]      915  Cutting edge 
         [0117]      916  Outer cone 
         [0118]      917  Inner cone 
         [0119]      918  Expanding tool/collet 
         [0120]      919  Cutting head 
         [0121]      920  Radial distance 
         [0122]      921  Longitudinal axis 
         [0123]      922  Stop 
         [0124]      923  Stop 
         [0125]      1001  Cutting head 
         [0126]      1002  Outer cone 
         [0127]      1003  Cylindrical section 
         [0128]      1004  Worm 
         [0129]      1005  Male thread 
         [0130]      1006  Worm wheel 
         [0131]      1007  Cutting head 
         [0132]      1008  Cutting edge 
         [0133]      1009  Cutting edge 
         [0134]      1010  Expanding tool/collet 
         [0135]      1101  Inner cone 
         [0136]      1102  Female thread 
         [0137]      1103  Cutout 
         [0138]      1201  Expanding tool/collet 
         [0139]      1202  Male thread 
         [0140]      1203  Outer cone 
         [0141]      1301  Cutting head 
         [0142]      1302  Female thread 
         [0143]      1303  Male thread 
         [0144]      1304  Hexagon socket 
         [0145]      1305  Threaded bolt 
         [0146]      1306  Male thread 
         [0147]      1307  Female thread 
         [0148]      1308  Expanding tool/collet 
         [0149]      1401  Cutting head 
         [0150]      1402  Threaded bolt 
         [0151]      1403  Hexagon socket 
         [0152]      1404  Female thread 
         [0153]      1405  Projection 
         [0154]      1406  Washer 
         [0155]      1407  Expanding tool/collet 
         [0156]      1408  Male thread 
         [0157]      1501  T-slot 
         [0158]      1502  Cutting edge 
         [0159]      1503  Bushing 
         [0160]      1504  Receptacle for collet 
         [0161]      1505  Mesh for socket wrench 
         [0162]      1506  Hollow shank taper interface 
         [0163]      1507  Pulling-on direction 
         [0164]      1508  Pulling-on direction