US20070173183A1 - Cutting tool with integrated abrasive trimming elements - Google Patents
Cutting tool with integrated abrasive trimming elements Download PDFInfo
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- US20070173183A1 US20070173183A1 US11/339,030 US33903006A US2007173183A1 US 20070173183 A1 US20070173183 A1 US 20070173183A1 US 33903006 A US33903006 A US 33903006A US 2007173183 A1 US2007173183 A1 US 2007173183A1
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- trimming
- cutting
- face
- cutter body
- tool
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
- B24D7/18—Wheels of special form
Definitions
- This present invention relates to multi-edge material cutting tools. More particularly it relates to a new and improved diamond and carbide cutting tool specially adapted to receive integrated abrasive grit trimming elements for accomplishing cutting and trimming operations in one step and a method of using same.
- a cutting tool 1 of the known prior art consists of a generally disc-shaped cutter body 2 with a central bore 3 .
- An outer periphery 4 of a cutting face 5 of the cutter body 2 is adapted to receive a plurality of radially arranged and spaced-apart cutting elements 6 .
- These cutting elements 6 are diamond-edged and project from the cutting face 5 of the cutter body 2 at predetermined angles found beneficial in the cutting of the material at hand.
- the plurality of diamond or carbide edged cutting elements 6 are fixedly brazed on to the cutting face 5 of the disc-shaped cutter body 2 near its outer periphery 4 at calculated spaced-apart intervals 7 .
- FIG. 2 shows the arrangement of the prior art cutting tool 1 during the manufacture of V-belts.
- the cutting tool 1 is connected to an arbor 8 that is connected to an energy source.
- a second cutting tool 9 is mounted upon the arbor 8 in face-to-face relation with first cutting tool 1 .
- the cutting elements 6 , 10 of the two cutting tools 1 , 9 are arranged so that their cutting elements 6 , 10 are positioned opposite, but at angles, to each other.
- cutting tools 1 , 9 are identical in manufacture except for the fact that their cutting elements 6 , 10 are oriented in opposite directions on their respective cutter bodies 2 , 11 .
- a V-shaped channel 12 is formed between the opposing cutting elements 6 , 10 of the cutting tools 1 , 9 .
- stock V-belt material 13 is drawn through the V-shaped channel 12 formed by the opposed rotating cutting elements 6 , 10 . By this manner the drawn stock V-belt material 13 is cut to size.
- the stock V-belt material 13 may contain woven or wound binding materials such as nylon or Kevlar to increase the strength, resiliency or useful working life of the manufactured V-belt. It will be appreciated that other materials apart from stock V-belt material, such as wood, non-ferrous metal and plastic material, could be cut or trimmed to varying patterns as desired using this construction of cutting tool.
- V-belts containing woven or wound binding materials a problem arises in that when a V-belt is cut to size, threads of the binding material project from resulting edges of the cut V-belt such that the edges are rough and in need of trimming.
- the prior art method of V-belt manufacture thus requires that a secondary trimming operation be performed upon the cut V-belt to remove the rough edges and threads.
- This secondary trimming operation is accomplished by one of two methods: grinding or slicing.
- grinding grinding
- a separate slicing machine employing thin rotary steel or carbide blades that dull quickly is used.
- V-belt manufacturing involves the two-step process of cutting stock V-belt material and then trimming the rough edges of the cut V-belt by means of grinding or slicing.
- the first step of the manufacturing operation involves cutting the belt to dimension using a cutting tool as is described above.
- the second step involves using an abrasive wheel or slicing knife to trim the binding material threads left after the initial cut.
- the integrated cutting and trimming tool comprises a generally disc-shaped cutter body with a plurality of spaced-apart cutting elements at the periphery of the cutter body, combined with a generally ring-shaped abrasive trimming plate having one or more radially projecting trimming elements.
- Each radially projecting trimming element extends from the outer ring portion of the abrasive trimming plate.
- Each radially projecting trimming element is selected, arranged and sized such that when the trimming plate is secured to a cutting face of the cutter body, each radially projecting trimming element lies in a specially created channel located in the space between two cutting elements on the cutter body.
- a further advantage of the present invention is realized by the fact the abrasive plate can be removably secured to the cutter body. By virtue of this feature the abrasive trimming plate is held securely to the cutter body during cutting and trimming operations. Yet, by using mechanical attachment means as opposed to fixed attachment means, the abrasive trimming plate can be easily removed from the cutter body for purposes of replacement and inspection.
- the outer ring portion of the abrasive plate has a radial dimension less than the radial distance of cutting elements on the cutter body (as measured from the center of a central bore to the axial edges of cutting elements).
- the abrasive plate When secured to the cutting face of the cutter body, the abrasive plate is positioned in such fashion such that its one or more radially projecting trimming elements extend into channels formed into the cutter body and extending between the cutting elements of the cutting tool.
- the radial distance of the outer ring portion of the abrasive plate would need to be modified to account for any structural projection from the cutting face of the cutter body serving as part of a cutting element receptacle.
- These cutting element receptacles receive cutting elements including a clamping wedge and a disposable cutting tip.
- the abrasive plate When secured to the cutting face of the cutter body, the abrasive plate is positioned in such fashion such that each of its radially projecting trimming elements extend into a channel formed into the cutter body and extend between the cutting element receptacles of the cutting tool.
- a cutting tool utilizing the present invention can therefore accomplish both the cutting and trimming operations necessary for V-belt manufacture in one operation instead of the two-step operation currently necessitated by the prior art.
- a further advantage of the present invention lies in the fact that the trimming performance of the integrated cutting and trimming tool can be modulated by altering the shape of the tip portion, including tip edge, of the radially projecting trimming elements. Additionally, the trimming depth of the of the abrasive plate on the integrated cutting and trimming tool of the present invention can be adjusted by means of shims inserted between the abrasive trimming plate and the cutter body.
- one or more individual trimming plates are each separately secured to the face of the cutter body between the cutting element receptacles.
- Each radially projecting trimming plate is selected, arranged and sized such that when the trimming plate is secured to a cutting face of the cutter body, each radially projecting trimming plates lies in a specially created channel in the space between two cutting element receptacles on the cutter body.
- a further advantage of the present invention is realized by the fact these individual trimming plates can be removably secured to the cutter body. By virtue of this feature the individual trimming plates are held securely to the cutter body during cutting and trimming operations.
- each individual trimming plate can be easily removed from the cutter body for purposes of replacement and inspection.
- the trimming depth of the individually securable abrasive trimming plate on the integrated cutting and trimming tool of the present invention can be adjusted by means of shims inserted between the abrasive trimming plate and the cutter body.
- the present invention is not limited to face cutters and can be adapted for use with other cutting tools such as circular saw blades, whose cutting elements are located on the edge of the tool, as opposed to its face.
- individual trimming elements are secured between the cutting teeth of a circular saw blade and the benefits of the combined cutting and trimming tool realized.
- the use of shims to vary the height of the radially projecting trimming elements, in relation to the cutting elements provides a means to adjust a single cutting tool for use in cutting a wide variety of materials and combinations of materials.
- the present invention includes not just the integrated cutting and trimming tool, but also an improved cutting tool, face-cutting and edge-cutting, uniquely adapted to accept a removably securable abrasive grit plate or the removably securable individual trimming elements.
- FIG. 1 is a perspective view of a cutting tool of the prior art.
- FIG. 2 is a perspective view a prior art cutting tool mounted in arrangement with a second cutting tool during the V-belt manufacturing process.
- FIG. 3 is a view of a braze-on cutting element of the prior art.
- FIG. 4 is a view of a cutting tool of the present invention capable of receiving a removably secured abrasive plate.
- FIG. 5 is an exploded view of a cutting element and cutting element receptacle of a cutting tool used in the preferred face cutting tool embodiment of the present invention.
- FIG. 6 is a view of a face cutting tool embodiment of the integrated cutting and trimming tool of the present invention.
- FIG. 7 is an exploded view of the abrasive ring removed from the cutter body.
- FIG. 8 is a view of a face cutting tool embodiment of the integrated cutting and trimming cutting tool of the present invention utilizing independent and separately securable trimming plates.
- FIG. 9 is a view of an edge cutting tool embodiment of the integrated cutting and trimming cutting tool of the present invention.
- V-belt cutting tools such as depicted in FIG. 1 cut well, however, they suffer from the short useful lifespan of the cutting elements. This is particularly a concern with cutting tools used in the manufacture of V-belts containing binding material such as nylon or Kevlar strand material. V-belts utilizing such binding materials, incorporate binding materials such as nylon and Kevlar between rubber layers to improve belt wear and prevent expansion. Binding materials such as nylon and Kevlar are, however, relatively difficult to cut.
- Prior art cutting tools generally include cutting tool bodies employing braze-on cutting blades for rough cutting V-belt stock material to size. In recent years these cutting blades have utilized diamond cutting edges due to the advantages of diamond-edged tools. In particular, diamond-edged cutting tools are preferred because they provide longer tool life than either steel or carbide cutting edges.
- FIG. 3 there is illustrated a braze-on diamond-edged embodiment of the cutting element 6 of the known prior art.
- the diamond-edged cutting element 6 of the known prior art is manufactured by the machining of commercially available stock diamond rounds.
- a diamond round consists of diamond material bonded to a substrate of metal carbide.
- the round is cut through use of wire electrical discharge machining (EDM) or lasers into the desired shape of a cutting tip.
- EDM wire electrical discharge machining
- the diamond With the braze-on diamond cutting element 6 , the diamond must cover the entire surface or face of the cutting edge 17 of the cutting element 6 due to the fact that a significant amount of carbide material 18 below the cutting edge 17 must remain to permanently affix the cutting element 6 to the cutter body 2 (shown in FIG. 1 ) by means of a braze alloy.
- Prior art cutting tools of the type shown in FIGS. 1 and 2 require expensive and highly specialized carbide or diamond grinding machinery to sharpen and maintain such cutting tools. Accordingly, with the cutting tool 1 using brazed-on cutting elements 6 , when the cutting edges 17 become dull, the entire tool body 2 must be shipped to an outside service provider for sharpening. This process takes from one to three weeks to complete, during which time the cutting tool is not available for production use. This length of service establishes the need for at least one, and normally two, complete sets of back-up tooling to insure that manufacturing production can continue without interruption.
- FIGS. 4 and 5 there is illustrated a cutting tool 20 for use with the present invention that utilizes an improved cutter body 21 as compared, for example, to cutter body 2 of cutting tool 1 depicted in FIG. 1 .
- this improved cutting tool 20 the above-described costs and time delays attendant to cutting tools utilizing brazed-on cutting tips can be overcome.
- the cutting tool 20 depicted in FIG. 4 includes a cutter body 21 with central bore 22 .
- the improved cutting tool utilizes disposable cutting tips 23 that are mechanically attached to the cutter body 21 . In this fashion dull cutting tips may be easily removed and discarded. When cutting tips 23 become dull, they are then replaced with new, sharp cutting tips. The removal and replacement of cutting tips 23 can be accomplished while the cutter body 21 remains in place on its powering device. Accordingly, by virtue of these advantages, the best mode for practicing the integrated cutting and trimming tool of the present invention disclosed herein utilizes this improved upon cutting tool 20 .
- Cutter body 21 has a general disc form and is made of an alloy such as aluminum alloy or a steel alloy.
- the cutter body 21 central bore 22 allows for mounting on an arbor.
- a plurality of cutting element receptacles 24 are provided along periphery 25 of the cutting face 26 of cutter body 21 to securely hold a plurality of removable cutting elements 27 .
- These cutting element receptacles 24 are adapted to receive the plurality of cutting elements 27 by means of clamping pressure.
- These receptacles 24 are formed and shaped according to the particular clamping method chosen to attach the cutting elements 27 to the cutting tool body 21 .
- the receptacles 24 and the cutting elements 27 secured therein, are located at spaced-apart intervals 28 along the outer periphery 25 of the cutting face 26 of cutter body 21 .
- Cutter body 21 is adapted to receive cutting elements 27 that include disposable cutting tips 23 that are mechanically attached to the cutter body 21 .
- FIG. 5 illustrates the attachment method of a cutting element 27 into a cutting element receptacle 24 .
- each cutting element receptacle 24 is machined so as to receive the components of a cutting element 27 and a clamping means for removably securing the cutting element 27 into position.
- the clamping means is provided by a screw down clamping piece 30 .
- FIG. 5 further illustrates the constituent parts of cutting element 27 as removed from the cutting element receptacle 24 .
- the cutting element 27 is comprised of two parts: a clamping wedge 31 and a diamond-edged cutting tip 23 .
- the clamping wedge 31 has a general block shape.
- the clamping wedge 31 is made of any hard material such as steel or carbide that is capable of accepting clamping pressure without deformation.
- a back portion 33 of the clamping wedge 31 has a slot 34 adapted to receive fixing projection 35 of screw-down clamping piece 30 that is screwed down into the cutter body 21 .
- a front face 36 of the clamping wedge 31 contains two posts 37 , 38 .
- Cutting tip 23 includes a cutting edge 40 and is configured with side slots 41 , 42 adapted to receive the two posts 37 , 38 projecting from the front face 36 of clamping wedge 31 .
- the cutting tip 23 is cut from commercially available diamond rounds using wire EDM in a fashion that minimizes the use of the expensive polycrystalline diamond coating portion 43 to the cutting edge 40 of the cutting tip 23 .
- side slots 41 , 42 on the cutting tip 23 receive posts 37 , 38 on the clamping wedge 31 .
- the now joined clamping wedge 31 and cutting tip 23 form a cutting element 27 that is inserted as a unit into the cutting element receptacle 24 and mechanically attached to the cutter body 21 in the manner described below.
- Each cutting element receptacle 24 is formed into the cutting face 26 of the cutter body 21 such that it includes a raised portion 45 with an adjacent trough 46 .
- the raised portion 45 includes an angled clamping face 47 that is ordinarily, but not necessarily radially aligned with the cutter body 21 .
- the angled clamping face 47 of the raised portion 45 is a flat surface that extends from a top portion 48 of the raised portion 45 to the bottom of the trough 46 .
- Trough 46 is shaped to accommodate and hold the cutting element 27 and screw down clamping piece 30 .
- clamping piece 30 When the cutting tip 23 is brought into arrangement with the clamping wedge 31 as indicated above, the entire cutting element 27 is then seated as shown in the cutting element receptacle 24 and against the clamping face 47 of raised portion 45 .
- the screw-down clamping piece 30 is then placed into the cutting element receptacle with slot 34 on the back 33 of the clamping wedge 31 snugly receiving clamping piece fixing projection 35 .
- Clamping piece 30 is provided with a threaded screw hole 50 . Screw hole 50 receives securing means, such as a hex bore screw 51 , which is threaded into screw hole 50 and on into a screw hole 52 in cutting element receptacle 24 until tightened. In this fashion clamping piece 30 is firmly secured to cutter body 21 .
- posts 37 , 38 of the clamping wedge 31 in conjunction with the clamping force exerted by screw down clamping piece 30 pressing the cutting tip 23 against the clamping face 47 of the raised portion 45 supply anti-ejection means for holding cutting element 27 to the cutter body 21 .
- Screw 53 located on radial edge 54 of the cutter body 21 and adjacent to the cutting element receptacle 24 provides additional protection against centrifugal ejection and serves to position the cutting tip 23 in cutting element receptacle 24 .
- screw 53 When turned clockwise, screw 53 is drawn tight into screw hole 80 in the cutter body 21 such that screw head 82 is drawn into contact with bottom portion 81 of cutting tip 23 . In this fashion screw head 82 serves as a barrier against centrifugal ejectment of the clamping wedge 31 and cutting tip 23 .
- the screw down clamping piece 30 therefore provides means for removably securing the clamping wedge 31 and cutting tip 23 in the cutting element receptacle. Once the cutting element 27 is secured in the cutting receptacle 24 , the cutting edge 40 of the cutting tip 23 is disposed at a predetermined angle found sufficient to cut V-belt material to the desired dimension. By repeating the above procedure all of the cutting element receptacles 24 on the cutter body 21 can be outfitted with cutting elements 27 .
- cutting face 26 of the cutter body 21 has a ring-shaped channel 60 with channel projections 61 machined into it.
- the channel 60 and the channel projections 61 are preferably formed by machining the cutter body 21 .
- the outer edge of ring-shaped channel 60 has a radial dimension, as measured from the center of central bore 22 , smaller than the radial distance from the center of the central bore to the axial edges 71 of the cutting element receptacles 24 .
- the channel projections 61 extend from outer edge 64 of the ring-shaped channel into the interval spaces 28 between the spaced-apart cutting element receptacles 24 .
- FIG. 6 shows a top angle view of the integrated cutting and trimming tool.
- FIG. 7 shows an exploded view of the abrasive trimming plate 62 removed from the cutter body 21 .
- the individual members are denoted by the following numbers: 21 : cutter body, 22 : central bore, 60 : ring-shaped channel, 24 : cutting element receptacle, 27 : cutting element, 61 : channel projection, 62 : ring-shaped abrasive trimming plate, 63 : radially projecting trimming element.
- ring-shaped channel 60 and channel projections 61 provide a recessed seat in the cutting face 26 of the cutter body 21 to receive the similarly shaped (generally ring-shaped) abrasive coated trimming plate 62 .
- the abrasive trimming plate 62 has a first face 76 and a second face 77 and is seated in the ring-shaped channel 60 such that one or more radially projecting trimming elements 63 of the abrasive coated trimming plate 62 are received by and lie in the channel projections 61 .
- the abrasive trimming plate 62 is provided with through holes 66 through which screws 67 are inserted and used to secure the plate 62 down to the cutter body 21 by means of screw holes 70 in the cutter body. Once screwed down, the abrasive coated trimming plate 62 is removably secured in the ring-shaped channel 60 and channel projections 61 .
- the abrasive trimming plate 62 may be formed of any durable material such as steel and then coated with abrasive material 68 , such as steel, carbide or diamond.
- the performance of the trimming plate 62 may be adjusted by altering the shape of tip portion 73 of the radially projecting trimming element 63 .
- grinding surface 74 of tip portion 73 may be beveled.
- sides 75 of tip portion 73 may be tapered.
- An abrasive trimming plate depicting trimming elements 63 with beveled and tapered tip portions 73 is depicted in FIGS. 6 and 7 .
- the performance of trimming element 63 may also be modulated by providing for a tip edge 79 that is curved (not shown), as opposed to straight (shown), along its width.
- each trimming element 63 need be coated with abrasive material 68 .
- both sides of each trimming element 63 are coated with abrasive material 68 .
- abrasive material 68 In this fashion when one side of the abrasive trimming plate 62 becomes worn from use it can be quickly removed from the cutter body 21 and flipped over exposing new abrasive material. The abrasive trimming plate 62 can then be quickly re-installed to the cutter body 21 , exposing fresh abrasive coating.
- each side of the coated abrasive plate can be coated with different grade or type of grit so as to allow for modulating trimming speed and performance or to accommodate differences in materials being cut.
- abrasive plate 62 may be fixedly attached to cutter body 21 by brazing or other means and the advantages of one step cutting and trimming of V-belts realized. Additionally, however, cutting tool 20 of the present invention may be purchased and used strictly as a cutting tool without the integrated abrasive tool feature described herein. By virtue of channel 60 , channel projections 61 and screw holes 70 , cutting tool 20 is uniquely adapted to securely receive a later purchased or replacement abrasive coated trimming plate 62 , which may be secured to cutter body 21 by use of screws 67 . Thus, the end user is afforded the choice of purchasing the cutting tool 20 with or without the integrated abrasive trimming plate 62 feature.
- the end user also has the choice of removing the abrasive trimming plate 62 when cutting materials that do not require its use. It is also to be appreciated at this point that the integrated cutting and trimming tool of the present invention may be made without channel 60 and that utilizing a cutter body with channel 60 in the cutter body 21 merely represents a preferred embodiment for practicing the invention.
- the integrated cutting and trimming tool accomplishes both the cutting and trimming operations necessary for one-step V-belt manufacture in one operation. Moreover, it is a further advantage of the present invention that the trimming depth of the integrated cutting and trimming tool can be easily adjusted.
- the integrated cutting and trimming tool provides for a shim or shims 72 to be inserted between the cutter body 21 and the abrasive coated ring-shaped plate trimming 62 . By adding and removing shims 72 the depth of trim of the abrasive trimming plate 62 can be varied in relation to the cutting tips 23 .
- the construct of the invention may be further varied depending on a number of factors, such as, in the case of V-belt manufacture, the size of belt stock and also, the type and composition of belt stock, including binding fibers.
- the cutter body may be adapted such that instead of receiving a generally ring-shaped trimming plate with radially projecting trimming elements, the cutter body 83 could be adapted to receive one or more individually securable trimming plates 92 (trimming elements without the interconnecting ring) that are located between the cutting elements.
- the individually securable trimming plates 92 can be fixedly secured or removably secured to cutter body 83 .
- each individually securable trimming plate to the cutter body, including without limitation, a screw or screws, clamping force or retaining slot.
- trimming plates 92 are removably secured to cutter body 83 by means of screws 97 .
- the present invention has particular application in the cutting and trimming of V-belts, the invention may also be used to cut and trim a variety of materials. Accordingly, while specific embodiments have been shown and described, many variations are possible. The shape of the cutter body and trimming plate may be changed as desired to suit the equipment with which it is used.
- the novel integration of combining trimming elements with a cutting tool of the present invention may be adapted for use with other cutter bodies, such as those used for circular saw blades that have cutting elements located on the edge of the tool, as opposed to its face.
- a view of the invention in this embodiment is shown in FIG. 9 .
- edge cutting tool 84 with cutter body 85 and cutting teeth 86 located on peripheral edge 93 is adapted to receive the separately securable, edge-mounted and abrasive coated trimming elements 87 in the peripheral spacing segments 88 on peripheral edge 93 of cutter body 85 .
- the peripheral spacing segments 88 are machined so as to accept trimming elements 87 , which in the preferred embodiment may be L-shaped or U-shaped.
- Each trimming element 87 is secured to cutter body 85 by means of a screw 89 .
- Surface 90 of trimming element 87 is coated with abrasive 91 to accomplish the trimming function of the tool.
- abrasive coated trimming elements are combined with an edge-cutting tool such as is depicted in FIG. 9 , the benefits of the combined cutting and trimming tool are realized.
- the height of the trimming elements, in relation to the cutting elements may be varied.
- shims (not shown) between the trimming elements and the cutter body provide a means to adjust a single cutting and trimming tool for use in cutting and trimming a wide variety of materials and combinations of materials.
- the shape and dimensions of the cutter body and trimming plate may also be changed to suit the operating speed of the tool or the speed at which stock is fed through the tool.
Abstract
Description
- This present invention relates to multi-edge material cutting tools. More particularly it relates to a new and improved diamond and carbide cutting tool specially adapted to receive integrated abrasive grit trimming elements for accomplishing cutting and trimming operations in one step and a method of using same.
- In the past, diamond and carbide cutting tools, such as wood working cutters, have been utilized for cutting a variety of materials, including wood, nonferrous metals, rubber drive belts and plastic. An example of a cutting tool of the known prior art such as is useful in the manufacture of V-belts is shown in
FIG. 1 . Acutting tool 1 of the known prior art consists of a generally disc-shaped cutter body 2 with acentral bore 3. Anouter periphery 4 of acutting face 5 of thecutter body 2 is adapted to receive a plurality of radially arranged and spaced-apartcutting elements 6. Thesecutting elements 6 are diamond-edged and project from thecutting face 5 of thecutter body 2 at predetermined angles found beneficial in the cutting of the material at hand. The plurality of diamond or carbide edgedcutting elements 6 are fixedly brazed on to thecutting face 5 of the disc-shaped cutter body 2 near itsouter periphery 4 at calculated spaced-apart intervals 7. -
FIG. 2 shows the arrangement of the priorart cutting tool 1 during the manufacture of V-belts. In the manufacture of V-belts, thecutting tool 1 is connected to anarbor 8 that is connected to an energy source. Asecond cutting tool 9 is mounted upon thearbor 8 in face-to-face relation withfirst cutting tool 1. In this orientation thecutting elements cutting tools cutting elements cutting tools common arbor 8,cutting tools cutting elements respective cutter bodies cutting tools common arbor 8 in this fashion, a V-shaped channel 12 is formed between theopposing cutting elements cutting tools cutting tools belt material 13 is drawn through the V-shaped channel 12 formed by the opposed rotatingcutting elements belt material 13 is cut to size. The stock V-belt material 13 may contain woven or wound binding materials such as nylon or Kevlar to increase the strength, resiliency or useful working life of the manufactured V-belt. It will be appreciated that other materials apart from stock V-belt material, such as wood, non-ferrous metal and plastic material, could be cut or trimmed to varying patterns as desired using this construction of cutting tool. - In the manufacture of V-belts containing woven or wound binding materials a problem arises in that when a V-belt is cut to size, threads of the binding material project from resulting edges of the cut V-belt such that the edges are rough and in need of trimming. The prior art method of V-belt manufacture thus requires that a secondary trimming operation be performed upon the cut V-belt to remove the rough edges and threads. This secondary trimming operation is accomplished by one of two methods: grinding or slicing. When trimming is accomplished by way of grinding, another machine dedicated to grinding the edges of the rough-hewn V-belts must be used. When trimming is accomplished by way of slicing, a separate slicing machine employing thin rotary steel or carbide blades that dull quickly is used. This slicing operation is slow, costly and relatively dangerous. Accordingly, the current state of the art of V-belt manufacturing involves the two-step process of cutting stock V-belt material and then trimming the rough edges of the cut V-belt by means of grinding or slicing. The first step of the manufacturing operation involves cutting the belt to dimension using a cutting tool as is described above. The second step involves using an abrasive wheel or slicing knife to trim the binding material threads left after the initial cut. There is thus a need in the art for a cutting tool that reduces the steps and production time involved in cutting and trimming V-belts. Therefore, any tool or method that would increase the rapidity of V-belt production is desirable. By extension, any manufacturing process that requires primary cutting and then secondary grinding, sanding, polishing or slicing will benefit from a cutting tool design that combines these processes in a manner that provides decreased manufacturing cycle time in production.
- The present invention fulfills the need for faster V-belt manufacture by providing for an integrated cutting and trimming tool for use in V-belt manufacture. In one embodiment, the integrated cutting and trimming tool comprises a generally disc-shaped cutter body with a plurality of spaced-apart cutting elements at the periphery of the cutter body, combined with a generally ring-shaped abrasive trimming plate having one or more radially projecting trimming elements. Each radially projecting trimming element extends from the outer ring portion of the abrasive trimming plate. Each radially projecting trimming element is selected, arranged and sized such that when the trimming plate is secured to a cutting face of the cutter body, each radially projecting trimming element lies in a specially created channel located in the space between two cutting elements on the cutter body. A further advantage of the present invention is realized by the fact the abrasive plate can be removably secured to the cutter body. By virtue of this feature the abrasive trimming plate is held securely to the cutter body during cutting and trimming operations. Yet, by using mechanical attachment means as opposed to fixed attachment means, the abrasive trimming plate can be easily removed from the cutter body for purposes of replacement and inspection.
- In the preferred embodiment, the outer ring portion of the abrasive plate has a radial dimension less than the radial distance of cutting elements on the cutter body (as measured from the center of a central bore to the axial edges of cutting elements). When secured to the cutting face of the cutter body, the abrasive plate is positioned in such fashion such that its one or more radially projecting trimming elements extend into channels formed into the cutter body and extending between the cutting elements of the cutting tool. In the case where the cutting tool utilizes mechanically secured disposable cutting tips such as are explained below, the radial distance of the outer ring portion of the abrasive plate would need to be modified to account for any structural projection from the cutting face of the cutter body serving as part of a cutting element receptacle. These cutting element receptacles receive cutting elements including a clamping wedge and a disposable cutting tip.
- When secured to the cutting face of the cutter body, the abrasive plate is positioned in such fashion such that each of its radially projecting trimming elements extend into a channel formed into the cutter body and extend between the cutting element receptacles of the cutting tool. A cutting tool utilizing the present invention can therefore accomplish both the cutting and trimming operations necessary for V-belt manufacture in one operation instead of the two-step operation currently necessitated by the prior art. A further advantage of the present invention lies in the fact that the trimming performance of the integrated cutting and trimming tool can be modulated by altering the shape of the tip portion, including tip edge, of the radially projecting trimming elements. Additionally, the trimming depth of the of the abrasive plate on the integrated cutting and trimming tool of the present invention can be adjusted by means of shims inserted between the abrasive trimming plate and the cutter body.
- In another embodiment of the present invention, one or more individual trimming plates (trimming elements without interconnecting ring portion) are each separately secured to the face of the cutter body between the cutting element receptacles. Each radially projecting trimming plate is selected, arranged and sized such that when the trimming plate is secured to a cutting face of the cutter body, each radially projecting trimming plates lies in a specially created channel in the space between two cutting element receptacles on the cutter body. A further advantage of the present invention is realized by the fact these individual trimming plates can be removably secured to the cutter body. By virtue of this feature the individual trimming plates are held securely to the cutter body during cutting and trimming operations. Yet, by using mechanical attachment means as opposed to fixed attachment means, each individual trimming plate can be easily removed from the cutter body for purposes of replacement and inspection. The trimming depth of the individually securable abrasive trimming plate on the integrated cutting and trimming tool of the present invention can be adjusted by means of shims inserted between the abrasive trimming plate and the cutter body.
- Furthermore, the present invention is not limited to face cutters and can be adapted for use with other cutting tools such as circular saw blades, whose cutting elements are located on the edge of the tool, as opposed to its face. Hence, in a further embodiment of the present invention, individual trimming elements are secured between the cutting teeth of a circular saw blade and the benefits of the combined cutting and trimming tool realized. As in the case with the face cutting and trimming tool, the use of shims to vary the height of the radially projecting trimming elements, in relation to the cutting elements, provides a means to adjust a single cutting tool for use in cutting a wide variety of materials and combinations of materials. Additionally, the present invention includes not just the integrated cutting and trimming tool, but also an improved cutting tool, face-cutting and edge-cutting, uniquely adapted to accept a removably securable abrasive grit plate or the removably securable individual trimming elements.
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FIG. 1 is a perspective view of a cutting tool of the prior art. -
FIG. 2 is a perspective view a prior art cutting tool mounted in arrangement with a second cutting tool during the V-belt manufacturing process. -
FIG. 3 is a view of a braze-on cutting element of the prior art. -
FIG. 4 is a view of a cutting tool of the present invention capable of receiving a removably secured abrasive plate. -
FIG. 5 is an exploded view of a cutting element and cutting element receptacle of a cutting tool used in the preferred face cutting tool embodiment of the present invention. -
FIG. 6 is a view of a face cutting tool embodiment of the integrated cutting and trimming tool of the present invention. -
FIG. 7 is an exploded view of the abrasive ring removed from the cutter body. -
FIG. 8 is a view of a face cutting tool embodiment of the integrated cutting and trimming cutting tool of the present invention utilizing independent and separately securable trimming plates. -
FIG. 9 is a view of an edge cutting tool embodiment of the integrated cutting and trimming cutting tool of the present invention. - Conventional V-belt cutting tools such as depicted in
FIG. 1 cut well, however, they suffer from the short useful lifespan of the cutting elements. This is particularly a concern with cutting tools used in the manufacture of V-belts containing binding material such as nylon or Kevlar strand material. V-belts utilizing such binding materials, incorporate binding materials such as nylon and Kevlar between rubber layers to improve belt wear and prevent expansion. Binding materials such as nylon and Kevlar are, however, relatively difficult to cut. - Prior art cutting tools generally include cutting tool bodies employing braze-on cutting blades for rough cutting V-belt stock material to size. In recent years these cutting blades have utilized diamond cutting edges due to the advantages of diamond-edged tools. In particular, diamond-edged cutting tools are preferred because they provide longer tool life than either steel or carbide cutting edges.
- Referring to
FIG. 3 , there is illustrated a braze-on diamond-edged embodiment of the cuttingelement 6 of the known prior art. The diamond-edgedcutting element 6 of the known prior art is manufactured by the machining of commercially available stock diamond rounds. A diamond round consists of diamond material bonded to a substrate of metal carbide. In order to manufacture a braze-on cutting element, the round is cut through use of wire electrical discharge machining (EDM) or lasers into the desired shape of a cutting tip. With the braze-ondiamond cutting element 6, the diamond must cover the entire surface or face of thecutting edge 17 of the cuttingelement 6 due to the fact that a significant amount ofcarbide material 18 below thecutting edge 17 must remain to permanently affix thecutting element 6 to the cutter body 2 (shown inFIG. 1 ) by means of a braze alloy. Prior art cutting tools of the type shown inFIGS. 1 and 2 require expensive and highly specialized carbide or diamond grinding machinery to sharpen and maintain such cutting tools. Accordingly, with thecutting tool 1 using brazed-oncutting elements 6, when the cutting edges 17 become dull, theentire tool body 2 must be shipped to an outside service provider for sharpening. This process takes from one to three weeks to complete, during which time the cutting tool is not available for production use. This length of service establishes the need for at least one, and normally two, complete sets of back-up tooling to insure that manufacturing production can continue without interruption. - Referring now to
FIGS. 4 and 5 , there is illustrated acutting tool 20 for use with the present invention that utilizes animproved cutter body 21 as compared, for example, tocutter body 2 of cuttingtool 1 depicted inFIG. 1 . By use of thisimproved cutting tool 20 the above-described costs and time delays attendant to cutting tools utilizing brazed-on cutting tips can be overcome. - The cutting
tool 20 depicted inFIG. 4 includes acutter body 21 withcentral bore 22. As opposed to the cutting tool employing brazed-on cutting elements, the improved cutting tool utilizesdisposable cutting tips 23 that are mechanically attached to thecutter body 21. In this fashion dull cutting tips may be easily removed and discarded. When cuttingtips 23 become dull, they are then replaced with new, sharp cutting tips. The removal and replacement of cuttingtips 23 can be accomplished while thecutter body 21 remains in place on its powering device. Accordingly, by virtue of these advantages, the best mode for practicing the integrated cutting and trimming tool of the present invention disclosed herein utilizes this improved upon cuttingtool 20. -
Cutter body 21 has a general disc form and is made of an alloy such as aluminum alloy or a steel alloy. Thecutter body 21central bore 22 allows for mounting on an arbor. A plurality of cuttingelement receptacles 24 are provided alongperiphery 25 of the cuttingface 26 ofcutter body 21 to securely hold a plurality ofremovable cutting elements 27. These cuttingelement receptacles 24 are adapted to receive the plurality of cuttingelements 27 by means of clamping pressure. Thesereceptacles 24 are formed and shaped according to the particular clamping method chosen to attach thecutting elements 27 to thecutting tool body 21. Thereceptacles 24 and the cuttingelements 27 secured therein, are located at spaced-apartintervals 28 along theouter periphery 25 of the cuttingface 26 ofcutter body 21. -
Cutter body 21 is adapted to receive cuttingelements 27 that includedisposable cutting tips 23 that are mechanically attached to thecutter body 21.FIG. 5 illustrates the attachment method of a cuttingelement 27 into a cuttingelement receptacle 24. In the arrangement shown, each cuttingelement receptacle 24 is machined so as to receive the components of a cuttingelement 27 and a clamping means for removably securing the cuttingelement 27 into position. In the embodiment shown, the clamping means is provided by a screw down clampingpiece 30. -
FIG. 5 further illustrates the constituent parts of cuttingelement 27 as removed from the cuttingelement receptacle 24. The cuttingelement 27 is comprised of two parts: a clampingwedge 31 and a diamond-edgedcutting tip 23. The clampingwedge 31 has a general block shape. The clampingwedge 31 is made of any hard material such as steel or carbide that is capable of accepting clamping pressure without deformation. Aback portion 33 of the clampingwedge 31 has aslot 34 adapted to receive fixingprojection 35 of screw-downclamping piece 30 that is screwed down into thecutter body 21. In a preferred embodiment, afront face 36 of the clampingwedge 31 contains twoposts - Cutting
tip 23 includes acutting edge 40 and is configured withside slots posts front face 36 of clampingwedge 31. The cuttingtip 23 is cut from commercially available diamond rounds using wire EDM in a fashion that minimizes the use of the expensive polycrystallinediamond coating portion 43 to thecutting edge 40 of the cuttingtip 23. When thefront face 36 of clampingwedge 31 and the cuttingface 44 of cuttingtip 23 are brought in face-to-face contact with each other,side slots tip 23 receiveposts wedge 31. The now joined clampingwedge 31 and cuttingtip 23 form a cuttingelement 27 that is inserted as a unit into the cuttingelement receptacle 24 and mechanically attached to thecutter body 21 in the manner described below. - Each cutting
element receptacle 24 is formed into the cuttingface 26 of thecutter body 21 such that it includes a raisedportion 45 with anadjacent trough 46. The raisedportion 45 includes an angled clampingface 47 that is ordinarily, but not necessarily radially aligned with thecutter body 21. The angled clamping face 47 of the raisedportion 45 is a flat surface that extends from atop portion 48 of the raisedportion 45 to the bottom of thetrough 46.Trough 46 is shaped to accommodate and hold the cuttingelement 27 and screw down clampingpiece 30. - When the cutting
tip 23 is brought into arrangement with the clampingwedge 31 as indicated above, theentire cutting element 27 is then seated as shown in the cuttingelement receptacle 24 and against the clampingface 47 of raisedportion 45. The screw-downclamping piece 30 is then placed into the cutting element receptacle withslot 34 on theback 33 of the clampingwedge 31 snugly receiving clampingpiece fixing projection 35. Clampingpiece 30 is provided with a threadedscrew hole 50.Screw hole 50 receives securing means, such as ahex bore screw 51, which is threaded intoscrew hole 50 and on into ascrew hole 52 in cuttingelement receptacle 24 until tightened. In thisfashion clamping piece 30 is firmly secured tocutter body 21. In the arrangement indicated, posts 37, 38 of the clampingwedge 31 in conjunction with the clamping force exerted by screw down clampingpiece 30 pressing the cuttingtip 23 against the clampingface 47 of the raisedportion 45 supply anti-ejection means for holding cuttingelement 27 to thecutter body 21.Screw 53 located onradial edge 54 of thecutter body 21 and adjacent to the cuttingelement receptacle 24 provides additional protection against centrifugal ejection and serves to position the cuttingtip 23 in cuttingelement receptacle 24. When turned clockwise, screw 53 is drawn tight intoscrew hole 80 in thecutter body 21 such thatscrew head 82 is drawn into contact withbottom portion 81 of cuttingtip 23. In thisfashion screw head 82 serves as a barrier against centrifugal ejectment of the clampingwedge 31 and cuttingtip 23. - The screw down clamping
piece 30 therefore provides means for removably securing the clampingwedge 31 and cuttingtip 23 in the cutting element receptacle. Once the cuttingelement 27 is secured in the cuttingreceptacle 24, thecutting edge 40 of the cuttingtip 23 is disposed at a predetermined angle found sufficient to cut V-belt material to the desired dimension. By repeating the above procedure all of the cuttingelement receptacles 24 on thecutter body 21 can be outfitted with cuttingelements 27. - Referring now to
FIG. 7 , cuttingface 26 of thecutter body 21 has a ring-shapedchannel 60 withchannel projections 61 machined into it. Thechannel 60 and thechannel projections 61 are preferably formed by machining thecutter body 21. The outer edge of ring-shapedchannel 60 has a radial dimension, as measured from the center ofcentral bore 22, smaller than the radial distance from the center of the central bore to theaxial edges 71 of the cuttingelement receptacles 24. Thechannel projections 61 extend fromouter edge 64 of the ring-shaped channel into theinterval spaces 28 between the spaced-apart cuttingelement receptacles 24. - The integrated cutting and trimming tool of the present invention is explained below and by referring to
FIGS. 6 and 7 .FIG. 6 shows a top angle view of the integrated cutting and trimming tool.FIG. 7 shows an exploded view of theabrasive trimming plate 62 removed from thecutter body 21. InFIGS. 6 and 7 , the individual members are denoted by the following numbers: 21: cutter body, 22: central bore, 60: ring-shaped channel, 24: cutting element receptacle, 27: cutting element, 61: channel projection, 62: ring-shaped abrasive trimming plate, 63: radially projecting trimming element. - In the currently understood best mode for practicing the invention, ring-shaped
channel 60 andchannel projections 61 provide a recessed seat in the cuttingface 26 of thecutter body 21 to receive the similarly shaped (generally ring-shaped) abrasive coated trimmingplate 62. As shown inFIGS. 6 and 7 , theabrasive trimming plate 62 has afirst face 76 and asecond face 77 and is seated in the ring-shapedchannel 60 such that one or more radially projectingtrimming elements 63 of the abrasivecoated trimming plate 62 are received by and lie in thechannel projections 61. In the preferred embodiment, theabrasive trimming plate 62 is provided with throughholes 66 through which screws 67 are inserted and used to secure theplate 62 down to thecutter body 21 by means of screw holes 70 in the cutter body. Once screwed down, the abrasivecoated trimming plate 62 is removably secured in the ring-shapedchannel 60 andchannel projections 61. - The
abrasive trimming plate 62, particularly the one or more radially projectingtrimming elements 63, may be formed of any durable material such as steel and then coated withabrasive material 68, such as steel, carbide or diamond. The performance of the trimmingplate 62 may be adjusted by altering the shape oftip portion 73 of the radially projecting trimmingelement 63. In this regard, grindingsurface 74 oftip portion 73 may be beveled. Additionally or alternatively, sides 75 oftip portion 73 may be tapered. An abrasive trimming plate depictingtrimming elements 63 with beveled and taperedtip portions 73 is depicted inFIGS. 6 and 7 . The performance of trimmingelement 63 may also be modulated by providing for a tip edge 79 that is curved (not shown), as opposed to straight (shown), along its width. - For economy's sake only the
tip portion 73 of the trimmingelements 63 need be coated withabrasive material 68. In the preferred embodiment of the present invention both sides of each trimmingelement 63 are coated withabrasive material 68. In this fashion when one side of theabrasive trimming plate 62 becomes worn from use it can be quickly removed from thecutter body 21 and flipped over exposing new abrasive material. Theabrasive trimming plate 62 can then be quickly re-installed to thecutter body 21, exposing fresh abrasive coating. Additionally, each side of the coated abrasive plate can be coated with different grade or type of grit so as to allow for modulating trimming speed and performance or to accommodate differences in materials being cut. - It is to be appreciated at this point that the
abrasive plate 62 may be fixedly attached tocutter body 21 by brazing or other means and the advantages of one step cutting and trimming of V-belts realized. Additionally, however, cuttingtool 20 of the present invention may be purchased and used strictly as a cutting tool without the integrated abrasive tool feature described herein. By virtue ofchannel 60,channel projections 61 and screw holes 70, cuttingtool 20 is uniquely adapted to securely receive a later purchased or replacement abrasivecoated trimming plate 62, which may be secured tocutter body 21 by use ofscrews 67. Thus, the end user is afforded the choice of purchasing thecutting tool 20 with or without the integratedabrasive trimming plate 62 feature. The end user also has the choice of removing theabrasive trimming plate 62 when cutting materials that do not require its use. It is also to be appreciated at this point that the integrated cutting and trimming tool of the present invention may be made withoutchannel 60 and that utilizing a cutter body withchannel 60 in thecutter body 21 merely represents a preferred embodiment for practicing the invention. - The integrated cutting and trimming tool accomplishes both the cutting and trimming operations necessary for one-step V-belt manufacture in one operation. Moreover, it is a further advantage of the present invention that the trimming depth of the integrated cutting and trimming tool can be easily adjusted. In this regard the integrated cutting and trimming tool provides for a shim or shims 72 to be inserted between the
cutter body 21 and the abrasive coated ring-shaped plate trimming 62. By adding and removingshims 72 the depth of trim of theabrasive trimming plate 62 can be varied in relation to the cuttingtips 23. - The construct of the invention may be further varied depending on a number of factors, such as, in the case of V-belt manufacture, the size of belt stock and also, the type and composition of belt stock, including binding fibers. As shown in
FIG. 8 , the cutter body may be adapted such that instead of receiving a generally ring-shaped trimming plate with radially projecting trimming elements, thecutter body 83 could be adapted to receive one or more individually securable trimming plates 92 (trimming elements without the interconnecting ring) that are located between the cutting elements. The individuallysecurable trimming plates 92 can be fixedly secured or removably secured tocutter body 83. Several means can be employed to removably secure each individually securable trimming plate to the cutter body, including without limitation, a screw or screws, clamping force or retaining slot. In the embodiment shown, trimmingplates 92 are removably secured tocutter body 83 by means ofscrews 97. Though the present invention has particular application in the cutting and trimming of V-belts, the invention may also be used to cut and trim a variety of materials. Accordingly, while specific embodiments have been shown and described, many variations are possible. The shape of the cutter body and trimming plate may be changed as desired to suit the equipment with which it is used. In particular, the novel integration of combining trimming elements with a cutting tool of the present invention may be adapted for use with other cutter bodies, such as those used for circular saw blades that have cutting elements located on the edge of the tool, as opposed to its face. A view of the invention in this embodiment is shown inFIG. 9 . In this edge-cutting embodiment of the present invention,edge cutting tool 84 withcutter body 85 and cuttingteeth 86 located onperipheral edge 93 is adapted to receive the separately securable, edge-mounted and abrasivecoated trimming elements 87 in theperipheral spacing segments 88 onperipheral edge 93 ofcutter body 85. In this embodiment theperipheral spacing segments 88 are machined so as to accept trimmingelements 87, which in the preferred embodiment may be L-shaped or U-shaped. Each trimmingelement 87 is secured tocutter body 85 by means of ascrew 89.Surface 90 of trimmingelement 87 is coated with abrasive 91 to accomplish the trimming function of the tool. When the described abrasive coated trimming elements are combined with an edge-cutting tool such as is depicted inFIG. 9 , the benefits of the combined cutting and trimming tool are realized. As in the case with the face cutting and trimming tool, the height of the trimming elements, in relation to the cutting elements, may be varied. In one embodiment, shims (not shown) between the trimming elements and the cutter body provide a means to adjust a single cutting and trimming tool for use in cutting and trimming a wide variety of materials and combinations of materials. - The shape and dimensions of the cutter body and trimming plate may also be changed to suit the operating speed of the tool or the speed at which stock is fed through the tool. Those of ordinary skill in the art will appreciate that the invention can be carried out with various other minor modifications from that disclosed herein, and same is deemed to be within the scope of this invention.
Claims (38)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US11/339,030 US20070173183A1 (en) | 2006-01-25 | 2006-01-25 | Cutting tool with integrated abrasive trimming elements |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US11/339,030 US20070173183A1 (en) | 2006-01-25 | 2006-01-25 | Cutting tool with integrated abrasive trimming elements |
Publications (1)
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US20070173183A1 true US20070173183A1 (en) | 2007-07-26 |
Family
ID=38286161
Family Applications (1)
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US11/339,030 Abandoned US20070173183A1 (en) | 2006-01-25 | 2006-01-25 | Cutting tool with integrated abrasive trimming elements |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070266840A1 (en) * | 2006-05-20 | 2007-11-22 | Adalbert Ottenwaelder | Saw tooth with hard layer |
WO2012022818A1 (en) * | 2010-08-17 | 2012-02-23 | Fermin Arias Sucarrats | Device for milling and polishing methacrylate or transparent plastics |
US10632549B2 (en) | 2016-12-15 | 2020-04-28 | Ford Motor Company | Blanking and trim die including an integrated power grinding tool |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070266840A1 (en) * | 2006-05-20 | 2007-11-22 | Adalbert Ottenwaelder | Saw tooth with hard layer |
WO2012022818A1 (en) * | 2010-08-17 | 2012-02-23 | Fermin Arias Sucarrats | Device for milling and polishing methacrylate or transparent plastics |
ES2375392A1 (en) * | 2010-08-17 | 2012-02-29 | Fermín Arias Sucarrats | Device for milling and polishing methacrylate or transparent plastics |
US20130196578A1 (en) * | 2010-08-17 | 2013-08-01 | Fermin Arias Sucarrats | Device for milling and polishing methacrylate or transparent plastics |
US10632549B2 (en) | 2016-12-15 | 2020-04-28 | Ford Motor Company | Blanking and trim die including an integrated power grinding tool |
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