瑞典专利SE1351355A1 Component group with cutting insert and components in it

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_19- ABSTRACT OF THE DISCLOSURE A cutting assembly useful for the chipforrning removal of material from a workpiece atthe cutting insert-workpiece interface. The cutting assembly has a holder with a coolantpassage and a seat. As one option, a stud extends away from the seat and facilitatescoolant ﬂow to an insert locking cap, which attaches to the stud. The insert locking capdirects coolant flow toward the cutting insert-workpiece interface. As another option, adiverter plate has a bottom surface with a bowl and an arcuate forward surface with oneor more openings. Coolant ﬂows from the coolant passage into the bowl then exitsthrough at least one opening in the arcuate forward surface towards the cutting insert- workpiece interface.
公开号:SE1351355A1
申请号:SE1351355
申请日:2013-11-15
公开日:2014-05-17
发明作者:Nicholas Henry；Shi Chen；Kent Mizgalski
申请人:Kennametal Inc；
IPC主号:

专利说明:

[1] [0001] This patent applications is a continuation-in-part of pending UnitedStates Patent Application Serial No. 12/ 874,591 filed on September 2, 2010 by Chen etal. for CUTTING INSERT ASSEMBLY AND COMPONENTS THEREOF.Applicants hereby claim priority based upon said U.S. Patent Application Serial No.12/ 874,591 filed on September 2, 2010 by Chen et al. for CUTTING INSERTASSEMBLY AND COMPONENTS THEREOF. Further, applicants herebyincorporate herein in its entirety such U.S. Patent Application Serial No. l2/874,59lfiled on September 2, 2010 by Chen et al. for CUTTING INSERT ASSEMBLY ANDCOMPONENTS THEREOF.
[2] [0002]particular, to a metal cutting system adapted to facilitate enhanced delivery of coolant The subject invention is directed to a metal cutting system and, in adjacent the interface between the cutting insert and the Workpiece (i.e., the insert-chipinterface) to diminish excessive heat at the insert-chip interface in the chipforrningremoval of material from a Workpiece. The subject invention is directed further tocomponents of such metal cutting systems. Such components include, for example, a locking pin, a clamp assembly, a holder, a shim and a cutting insert.[0003] comprise a cutting insert having a surface terrninating at a cutting edge and a tool holder Metal cutting tools for performing metal Working operations generally formed With a seat adapted to receive the insert. The cutting insert engages a Workpieceto remove material, and in the process forms chips of the material. Excessive heat at theinsert-chip interface can negatively impact upon (i.e., reduce or shorten) the useful toollife of the cutting insert.
[4] [0004](e. g., through Welding) to the surface of the cutting insert. The build up of chip material on the cutting insert in this fashion is an undesirable occurrence that can negatively For example, a chip generated from the Workpiece can sometimes stick impact upon the performance of the cutting insert, and hence, the overall materialremoval operation. A ﬂoW of coolant to the insert-chip interface Will reduce thepotential for such Welding. It Would therefore be desirable to reduce excessive heat atthe insert-chip interface to eliminate or reduce build up of chip material.
[5] [0005] can occur instances in Which the chips do not exit the region of the insert-chip interface As another example, in a chipforrning material removal operation, there When the chip sticks to the cutting insert. When a chip does not exit the region of theinsert-chip interface, there is the potential that a chip can be re-cut. It is undesirable forthe milling insert to re-cut a chip already removed from the Workpiece. A ﬂow ofcoolant to the insert-chip interface Will facilitate the evacuation of chips from the insert-chip interface thereby minimizing the potential that a chip Will be re-cut.
[6] [0006]costs and decreases overall production efficiency. Excessive heat at the insert-chip There is an appreciation that a shorter useful tool life increases operating interface contribute to the Welding of chip material and re-cutting of chips, both ofWhich are detrimental to production efficiency. There are readily apparent advantagesconnected With decreasing the heat at the insert-chip interface Wherein one Way to decrease the temperature is to supply coolant to the insert-chip interface.
[7] [0007]during cutting. For example, some systems use extemal nozzles to direct coolant at the Heretofore, systems operate to lower the cutting insert temperature cutting edge of the insert. The coolant serves not only to lower the temperature of theinsert but also to remove the chip from the cutting area. The nozzles are often a distanceof one to tWelve inches away from the cutting edge. This is too far of a distance foreffective cooling. The farther the coolant must travel, the more the coolant Will mixWith air and the less likely it Will be to contact the tool-chip interface.
[8] [0008] U.S. Patent No. 6,053,669 to Lagerberg for CHIP FORMING CUTTINGINSERT WITH INTERNAL COOLING discusses the importance of reducing the heatat the insert-chip interface. Lagerberg mentions that When a cutting insert made fromcemented carbide reaches a certain temperature, its resistance to plastic deformationdecreases. A decrease in plastic deformation resistance increases the risk for breakageof the cutting insert. U.S. Patent No. 5,775,854 to Wertheim for METAL CUTTINGTOOL points out that a rise in the Working temperature leads to a decrease in hardness of the cutting insert. The consequence is an increase in Wear of the cutting insert.
[9] [0009]coolant to the insert-chip interface. For example, U.S. Patent No. 7,625,l57 to Prichardet al. for MILLING CUTTER AND MILLING INSERT WITH COOLANTDELIVERY pertains to a cutting insert that includes a cutting body With a centralcoolant inlet. The cutting insert further includes a positionable diverter. The diverterhas a coolant trough, Which diverts coolant to a specific cutting location.
[10] [0010] U.S. Patent No. 6,045,300 to Antoun for TOOL HOLDER WITHINTEGRAL COOLANT PASSAGE AND REPLACEABLE NOZZLE discloses usinghigh pressure and high volume delivery of coolant to address heat at the insert-chip interface. U.S. Patent No. 6,652,200 to Kraemer for a TOOL HOLDER WITHCOOLANT SYSTEM discloses grooves between the cutting insert and a top plate.Coolant ﬂows through the grooves to address the heat at the insert-chip interface. U.S.Patent No. 5,90l,623 to Hong for CRYOGENIC MACHINING discloses a coolantdelivery system for applying liquid nitrogen to the insert-chip interface.
[13] [0013] chipforrning removal of material from a workpiece at the cutting insert-workpiece In another form thereof, the invention is a cutting assembly for the interface. The cutting assembly comprises a holder containing a coolant passage and aseat. The assembly includes a threaded stud threadedly received at a lower threadedsection thereof within the coolant passage and extending away from the seat. Theassembly includes a cutting insert that has a rake surface and a central aperture whereinan upper threaded section of the threaded stud extends through the central aperture ofthe cutting insert. There is an insert locking cap that engages the upper threaded sectionof the threaded stud whereby the insert locking cap exerts biasing force against the rakesurface of the cutting insert so as to securely retain the cutting insert in the seat. Theinsert locking cap contains a transverse locking cap bore and an outer exit in communication with the transverse locking cap bore. The insert locking cap contains an exterior annular groove in communication with the transverse locking cap bore throughthe outer exit. A coolant ring, which is adjustable, is received on the insert locking capso as to encompass the exterior annular groove. The coolant ring contains an interiorgroove which together with the exterior annular groove forrns a coolant channel. Thecoolant ring contains an opening in communication with the coolant channel. Thethreaded stud contains a central longitudinal bore with an entrance in the coolantpassage and an exit adjacent the transverse locking cap bore whereby coolant flowsfrom the coolant passage and into the central longitudinal bore exiting into thetransverse locking cap bore and passing into the coolant channel whereby coolant sprays out of the opening toward the cutting insert-workpiece interface.
[14] [0014] a cutting assembly that has a holder that contains a coolant passage for the chipforrning In yet another form thereof, the invention is a diverter plate for use with removal of material from a workpiece at the cutting insert-workpiece interface. Thediverter plate comprises a bottom surface wherein the bottom surface contains a bowl.The diverter plate further contains an arcuate forward surface containing an opening (3 80,452). Coolant ﬂows from the coolant passage into the bowl then exits through the opening in the arcuate forward surface towards the cutting insert-workpiece interface.
[15] [0015] The following is a brief description of the drawings that form a part ofthis patent application:[0016] FIG. 1 is an isometric view of a first specific embodiment of a cutting unit assembly;
[17] [0017] cutting insert and shim removed; FIG. 2 is a top view of the cutting unit assembly of FIG. 1 with the
[18] [0018] with the cutting insert and shim removed taken along section line 3-3 of FIG. 2; FIG. 3 is a cross-sectional view of the cutting unit assembly of FIG. 1
[19] [0019] with the cutting insert and shim removed taken along section line 4-4 of FIG. 2; FIG. 4 is a cross-sectional view of the cutting unit assembly of FIG. 1
[20] [0020] FIG. 5 is a top view of the shim, which is a part of the cutting unitassembly of FIG. 1;
[21] [0021] FIG. 6 is a cross-sectional view of the shim of FIG. 5 taken along thesection line 6-6 of FIG. 5;
[22] [0022]cutting unit assembly of FIG. 1; FIG. 7 is a top view of the round cutting insert, Which is a part of the
[23] [0023] FIG. 8 is an isometric View of the round cutting insert of FIG. 7;
[24] [0024]taken along section line 9-9 of FIG. 7; FIG. 9 is a cross-sectional View of the round cutting insert of FIG. 7
[25] [0025]the cutting unit assembly of FIG. 1; FIG. 10 is an isometric View of the insert locking cap, Which is a part of
[26] [0026] FIG. 11 is a side View of the insert locking cap of FIG. 10;
[27] [0027]taken along section line 12-12 in FIG. 11; FIG. 12 is a cross-sectional View of the insert locking cap of FIG. 10
[28] [0028]unit assembly of FIG. 1; FIG. 13 is an isometric View of the stud, Which is a part of the cutting
[29] [0029] FIG. 14 is a top View ofthe stud of FIG. 13;
[30] [0030] FIG. 15 is a cross-sectional View of the stud taken along section line 15-15 of FIG. 14;
[31] [0031] FIG. 16 is an isometric View of the cutting unit assembly of FIG. 1 shoWing the cutting unit assembly in one orientation;
[32] [0032]of the cutting unit assembly of FIG. 1 shoWing the travel of coolant; FIG. 17 is a cross-sectional schematic View of one specific embodiment
[33] [0033]second specific embodiment of a cutting unit assembly; FIG. 18 is an isometric View of the insert locking cap that is a part of a
[34] [0034] FIG. 19 is a side View of the insert locking cap of FIG. 18;[0035] FIG. 20 is a top View of the insert locking cap of FIG. 18;[0036] FIG. 21 is a cross-sectional View of the insert locking cap of FIG. 18 taken along section line 21-21 of FIG. 19;
[37] [0037]specific embodiment of a cutting unit assembly; FIG. 22 is a side View of the coolant ring that is a part of a second
[38] [0038] FIG. 23 is a top View of the coolant ring;
[39] [0039]along section line 24-24 of FIG. 23; FIG. 24 is a cross-sectional View of the coolant ring of FIG. 22 taken
[40] [0040]that is a part of a second specific embodiment of a cutting unit assembly; FIG. 25 is an isometric View of a specific embodiment of a threaded stud
[41] [0041] FIG. 26 is a top View of the threaded stud of FIG. 25;
[42] [0042] FIG. 27 is a cross-sectional View of the threaded stud of FIG. 25 takenalong section line 27-27 of FIG. 26;
[43] [0043] cutting unit assembly showing the cutting unit assembly in one orientation with regard FIG. 28 is an isometric View of the second specific embodiment of a to coolant spraying toward the cutting insert-workpiece interface;
[44] [0044] cutting unit assembly showing the cutting unit assembly in another orientation with FIG. 28A is an isometric View of the second specific embodiment of a regard to coolant spraying toward the cutting insert-workpiece interface;
[45] [0045]embodiment of the cutting unit assembly of FIG. 28 showing the travel of coolant FIG. 29 is a cross-sectional schematic View of the second specific through the cutting unit assembly;
[46] [0046]unit assembly; FIG. 30 is an isometric View of a third specific embodiment of a cutting
[47] [0047] FIG. 31 is a top View of the cutting unit assembly of FIG. 30;
[48] [0048]embodiment of a diVerter plate for use in the third specific embodiment of the cuttingunit assembly of FIG. 30; FIG. 32 is an isometric View toward the top surface of one specific
[49] [0049]embodiment of a diVerter plate of FIG. 32; FIG. 33 is an isometric View toward the bottom surface of specific
[50] [0050]embodiment of FIG. 30 wherein the diVerter plate of FIG. 32 is exploded away from the FIG. 34 is an isometric View of the clamp assembly of the third specific screw-clamp arm assembly;
[51] [0051] FIG. 35 is a top View of the diVerter plate of FIG. 32;
[52] [0052]along section line 36-36 of FIG. 35; FIG. 36 is a cross-sectional View of the diVerter plate of FIG. 32 taken
[53] [0053] FIG. 37 is a bottom View of the diVerter plate of FIG. 32;
[54] [0054]for use in the third specific embodiment of the cutting unit assembly of FIG. 30; FIG. 38 is a top View of a second specific embodiment of a diVerter plate
[55] [0055] FIG. 39 is a cross-sectional view of the diverter plate of FIG. 38 takenalong section line 39-39 of FIG. 38;
[56] [0056] FIG. 40 is a bottom view of the diverter plate of FIG. 38;
[57] [0057] FIG. 41 is an isometric view toward the top surface of the diverter plateof FIG. 38;
[58] [0058] FIG. 42 is an isometric view toward the bottom surface of specific embodiment of a diverter plate of FIG. 38;
[59] [0059]embodiment of a cutting assembly using the diverter plate of FIG. 38 and showing the FIG. 43 is a cross-sectional schematic view of the third specific ﬂow of coolant through the cutting unit assembly;
[60] [0060]third specific embodiment of the cutting assembly; FIG. 43A is a cross-sectional view of the shim retaining screw of the
[61] [0061]embodiment of the cutting unit assembly of FIG. 30; and FIG. 44 is a top view of a round cutting insert for use in the third specific
[62] [0062]taken along section line 45-45 of FIG. 44.
[63] [0063]workpiece to remove material from a workpiece typically in the form of chips. A In a chipforrning material removal operation, the cutting insert engages a material removal operation that removes material from the workpiece in the form ofchips typically is known by those skilled in the art as a chipforrning material removaloperation. The book Machine Shop Practice [Industrial Press Inc., New York, NewYork (1981)] by Moltrecht presents at pages 199-204 a description, inter alía, of chipformation, as well as different kinds of chips (i.e., continuous chip, discontinuous chip,segmental chip). Moltrecht reads [in part] at pages 199-200, “When the cutting toolfirst makes contact with the metal, it compresses the metal ahead of the cutting edge.
[64] [0064]specific embodiment of a cutting unit assembly is generally designated as 50. Cutting Referring to the drawings including without limitation FIGS. 1-4, a first unit assembly 50 includes a holder 52 that has a forward Working end 54 and a rearwardend 56. The holder 52 has an enlarged head 58, which is adjacent to the forwardworking end 54, that presents a seating surface or seat 60 adapted to receive a shim 74and a cutting insert 75 wherein the shim 74 and cutting insert 75 are secured to the seat60 as will be described hereinafter. The seat 60 is surrounded by an upstanding semi-circular wall 62, which is disposed at an angle of 90 degrees with respect to the surfaceof the seat 60, wherein the wall 62 provides support in one direction for the shim 74 andcutting insert 75 when positioned on and secured to the seat 60. The holder 52 furtherincludes a shank 64 adj acent to the rearward end 56 thereof The cutting unit assembly attaches at the shank 64 to a larger machine tool.
[65] [0065]entrance 68 adjacent to the shank 64 and an exit 70 at the seat 60. As will be described hereinafter, coolant, which is under pressure, enters the coolant passage 66 through the The holder 52 further contains a coolant passage 66 which has an entrance 68 and exits via the exit 70 at the seat 60 directly into the assembly ofcomponents comprising the insert locking cap 80, the stud 120, the shim 74 and thecutting insert 75. Coolant emits from this cutting unit assembly to impinge upon theinterface between the cutting insert and workpiece, i.e., the cutting insert-workpieceinterface. The holder 52 includes a set screw bore 78 that receives a set screw 76wherein the set screw 76 helps secure the stud 120 in position as will be described hereinafter.
[66] [0066]shim 74 of the cutting unit assembly 50 ﬁarther includes a shim body 158 wherein the Referring to the drawings including without limitation FIGS. 5 and 6, the shim body 158 has an upper surface 160 and a lower surface 162. Shim body 158further includes a central shim bore 164 that has an entrance 168 and an exit 166. Thecentral shim bore 164 has an enlarged diameter section 170 adjacent to the exit 166 anda reduced diameter section 172 adj acent to the entrance 168. The enlarged diametersection 170 and the reduced diameter section 172 are joined together by a frusto-conical section 174.
[67] [0067]cutting insert 75 of the cutting unit assembly 50 includes a round cutting insert body 180 that has a rake surface 182, a flank surface 184, and a bottom surface 186. There is a cutting edge 187 at the juncture between the rake surface 182 and the ﬂank surface Referring to the drawings including without limitation FIGS. 7-9, the 184. The round cutting insert body 180 contains a central bore 188 that includes anentrance 190 and an exit 192. The central bore 188 also has an upper portion 194,which is adjacent to exit 192 and has an enlarged diameter, and a lower portion 196, which is adj acent to the entrance 190 and has a reduced diameter.
[68] [0068]locking cap 80 and the stud 120 that together secure the shim 74 and cutting insert 75 tothe holder 52. The assembly of the insert locking cap 80 and the threaded stud 120 also provide a means by which coolant travels to the cutting insert-workpiece interface.
[69] [0069]threaded stud 120 has an axial forward end 122 and an axial rearward end 124. Stud Referring to the drawings including without limitation FIGS. 13-15, the 120 has an upper reduced diameter portion 126 adjacent the axial forward end 122 and alower enlarged diameter portion 128 adjacent the axial rearward end 124. The extemalsurface of the stud 120 presents a threaded region 130 and a smooth surface region 132.The smooth surface region 132 includes a trio of longitudinal troughs 134. Eachlongitudinal trough 134 has an entrance 142 and an exit 144. The threaded region 130joins the smooth region 132 at a shoulder 136 as shown in FIGS. 13 and 15. Each of thelongitudinal troughs 134 has an arcuate trough surface 136. An arcuate surface or land140 in the smooth surface region 132 separates each one of the longitudinal troughs 134 from each other. Threaded stud 120 includes a hexagonal closed bore 148 at the axial _10- forward end 122. Hexagonal closed bore 148 includes an opening 150 and a terrnination surface or end 152.
[70] [0070]assembly and operation of the first specific embodiment of the cutting unit assembly 50 Referring to the drawings including without limitation FIGS. 16-17, the is described below.
[71] [0071]the ﬂow of coolant (as shown by arrows) from the coolant passage 66 and through the FIG. 17 is a cross-sectional schematic View of the assembly that shows assembly of the central locking cap 100 -the stud 120 -the shim 74- the cutting insert75. Coolant, which is typically under pressure, ﬂows from the coolant passage 66through the exterior longitudinal troughs 134 of the threaded stud 120 in an upwarddirection as shown by the arrows in FIG. 17. Coolant exits the exits 144 (at the upperend as shown in FIG. 17) of the exterior longitudinal troughs 134 into the Volume of thecentral shim bore 164 and at least a part of the Volume of the central aperture 188 of thecutting insert 75. Coolant continues to ﬂow into the cutout portion 108 of the insertlocking cap 80 exiting the side opening 110 under pressure so as to spray towards the cutting insert-workpiece interface.
[72] [0072]position by rotating the stud 120 in the coolant passage 66 to the desired position. The The position of the threaded stud 120 can be rotated to a pre-selected stud 120 can then be secured in position by tightening the set screw 76 to where the setscrew 76 firmly abuts against the threaded stud 120. The insert locking cap 80 threadsat the threads 106 onto the threaded region 130 of the stud 120 in such a fashion so thatas the insert locking cap 80 is tightened, there is a significant compressive bias againstthe cutting insert 75 thereby strongly securing the cutting insert 75 and the shim 74 inposition on the seat 60 of the holder 52. More specif1cally, the cutting insert 75 issandwiched between the insert locking cap 80 and the shim 74 is sandwiched between the cutting insert 75 and the seat or seating surface 60.
[73] [0073]above, there should be an appreciation that the direction of the coolant spray can Vary FIG. 16 shows the coolant spray (CS) in one orientation. As described depending upon the position of the stud 120 in the coolant passage 66. A variation in the direction of the coolant spray can accommodate Various cutting applications.
[74] [0074]there is illustrated a second specific embodiment of a cutting unit assembly, which is Referring to the drawings including without limitation FIGS. 17-29, generally designated as 200 in FIG. 29, includes a holder 201 which contains a coolantpassage 202 wherein the coolant passage 202 has a threaded section 203 adjacent to theseat 205. A threaded stud 278 threadedly engages the coolant passage 202 adjacent the _11- exit thereof. The threaded stud 278 passes through the shim 74 and the cutting insert75. An insert locking cap 224 attaches to the threaded stud 278 and a coolant ring 204encompasses the insert locking cap 224. The details of the cutting unit assembly 200 are set forth hereinafter.
[75] [0075]forward end 280 and an axial rearward end 282. Threaded stud 278 has a lower The cutting unit assembly contains a threaded stud 278 that has an axial enlarged diameter section 286 as well as an integral flange 288 and has a forwardlyfacing shoulder 300 and a rearwardly facing shoulder 302. The threaded stud 278further has an upper reduced diameter portion 304 which presents a lower threadedsection 306. The threaded stud 278 has a central longitudinal bore 3 l2 that has anentrance 3 l4 and an exit 3 l6. The central longitudinal bore 3 l2 has a circular section 3 l 8 and a hexagonal section 320.
[76] [0076]that has an axial forward end 226 and an axial rearward end 228. The insert locking cap224 further has a head portion 230 and a shank portion 232. The head portion 230 has areduced diameter cylindrical portion 234 and an enlarged diameter cylindrical portion236 joined together by a frusto-conical shoulder 238. The head portion 230 furthercontains an annular groove 240. The head portion 230 further has threads 23 l. The shank portion 232 includes a cylindrical section 246 that is continuous with a frusto- The cutting unit assembly 200 also includes an insert locking cap 224 conical section 248. The insert locking cap 224 contains a longitudinal locking cap bore252 that has an entrance 254 and an inner terrnination surface 256. The insert lockingcap 224 further has a transverse locking cap bore 260 that has an inner entrance 262 andan outer exit 264. The insert locking cap 224 has an upper closed sinusoidal bore 268 that has an entrance 270 and a terrnination surface 272.
[77] [0077]a top 206 and a bottom and 208. Coolant ring 204 further has an exterior surface 2l0 and an interior volume 2l2 wherein there is an opening 2l4 in the coolant ring 204.
[78] [0078] Referring to the drawings and without limitation to FIG. 29, FIG. 29 is across-sectional schematic view that shows the ﬂow of coolant in the coolant passage202 through the assembly of the coolant ring 204 - insert locking cap 224 - threaded _12- stud 278 - cutting insert 75 - shim 74. In this kind of assembly coolant is typicallyunder pressure so that coolant ﬂows in and out of the coolant passage 202 into theentrance 314 of the central longitudinal bore 312 of the threaded stud 278. Coolantexits the central longitudinal bore 312 at exit 316 thereof, and then ﬂows into thetransverse locking cap bore 260 via the inner entrance 262 thereof Coolant then exitsinto the transverse locking cap bore 260 and passes into the coolant channel 222whereby coolant sprays out of the opening 214 toward the cutting insert-workpiece interface.
[79] [0079] Insert locking cap 224 threads into the threaded section 306 of thethreaded stud 278 to such an extent so as to exert a bias against the cutting insert 75thereby securing both the cutting insert 75 and shim 74 to seat 60. The threaded stud278 threads into the coolant passage 202. By varying the extent the coolant ring 204 isthreaded onto the insert locking cap 224, the coolant ring 204 can vary its positionrelative to the insert locking cap 224 so as to vary the orientation of the opening 214 and hence the direction of the coolant spray.
[80] [0080]assembly generally designated as 322 includes a holder 329 that has a forward end 323 Referring to FIG. 30, a third speciﬁc embodiment of the cutting unit and a rearward end 324. The holder 329 presents a seat 325 as well as contains acoolant passage 326 that has an exit 327 and an entrance 328. The exit 327 of thecoolant passage 326 is at the seat 325.
[81] [0081]top surface 332, a bottom surface 334, a rear end 336, a forward end 338, a side surface The cutting unit assembly further includes a diverter plate 330 that has a 340, and an opposite side surface 342. The diverter plate 330 contains in the top surface332 a longitudinal groove 346 and a transverse groove 348. The diverter plate 330further has a central sloped surface 350, a lateral sloped surface 352, a lateral slopedsurface 354, and an arcuate forward surface 356. Side surface 340 includes a lateralgroove 358 that includes a beveled surface 362 and a straight surface 364. Side surface342 includes a lateral groove 360 that includes a beveled surface 366 and a straightsurface 368. The bottom surface 334 of the diverter plate 330 defines a bowl 372 that isdefined in part by a semicircular wall 374 as well as a pair of opposite ﬂared walls 376in 378. Bowl 372 ﬁarther has an opening 380.
[82] [0082] The cutting unit assembly 322 also includes around cutting insert body384 that has a rake surface 386, a flank surface 388, and a bottom surface 390. Theround cutting insert body 384 contains a central bore 392 that has an entrance 394 and an exit 396. The central bore 392 has a generally constant diameter. The cutting unit _13- assembly 322 also uses a shim 74 like the earlier described shims 74. Referring to FIG.43A, the cutting insert assembly 322 also has a shim retaining screw 456. Shimretaining screw 456 has a central longitudinal bore 458, a ﬂange 460, and a threadedportion 462.
[83] [0083]400 that engage the diverter plate 330 at the lateral grooves 358, 360. This kind of connection allows the diverter plate 330 to be changed depending upon the specific The diverter plate 330 is attached to the clamp assembly 398 via prongs application.
[84] [0084] Referring to FIG. 43, the shim 74 is positioned on the seat 325 and theshim retaining screw 456 is threadedly received in a threaded portion of the coolantpassage 326. The ﬂange 460 of the shim retaining screw 456 engages the frusto-conicalsection 174 of the shim 74 to retain the shim 74 to the seat 325. The cutting insert 384rests on the top of the shim 74. The diverter plate 330 is pressed down by the clampassembly 398 biases against the rake surface of the cutting insert 384 to retain thecutting insert 384 in position. Coolant then ﬂows through the coolant passage 326 andinto the central longitudinal bore 458 of the shim retaining screw 456. The coolant thenﬂows through the central bore 392 of the cutting insert 384. Coolant impinges thesurface of the bowl 372 of the diverter plate 330 wherein the coolant exits the bowl 372 through the opening 380 towards the cutting insert-workpiece interface.
[85] [0085]plate 402 includes a top surface 404, a bottom surface 406, a rear end 408, a forward Referring to FIGS. 38-42, another specific embodiment of the diverter end 410, and a pair of opposite side surfaces 412, 414. The top surface 404 of thediverter plate 402 contains a longitudinal groove 418 and a transverse groove 420. Topsurface 404 further includes a central sloped surface 422, and a pair of opposite lateralsloped surfaces 424, 426. Further, the diverter plate 402 includes an arcuate forwardsurface 428. Side surface 412 includes a lateral groove 430 that includes a beveledsurface 434 and a straight surface 436. Side surface 414 contains a lateral groove 432that includes a beveled surface 438 and a straight surface 440. The bottom surface 406of the diverter plate 402 contains a bowl 444 that is defined at least in part by a semi-circular wall 446 in the pair of opposite ﬂared walls 448, 450. There are a plurality of openings 452 that provide communication out of the bowl 444.
[86] [0086]kinds of ﬂuid or coolant are suitable for use in the cutting insert. Broadly speaking, There should be an appreciation that any one of a number of different there are two basic categories of ﬂuids or coolants; namely, oil-based ﬂuids which include straight oils and so luble oils, and chemical ﬂuids which include synthetic and _14- semisynthetic coolants. Straight oils are composed of a base mineral or petroleum oiland often contain polar lubricants such as fats, vegetable oils, and esters, as well asextreme pressure additives of chlorine, sulfur and phosphorus. Soluble oils (also calledemulsion ﬂuid) are composed of a base of petroleum or mineral oil combined withemulsif1ers and blending agents Petroleum or mineral oil combined with emulsif1ers andblending agents are basic components of soluble oils (also called emulsifiable oils). Theconcentration of listed components in their water mixture is usually between 30-85 %.Usually the soaps, wetting agents, and couplers are used as emulsifiers, and their basicrole is to reduce the surface tension. As a result they can cause a ﬂuid tendency tofoam. In addition, soluble oils can contain oiliness agents such as ester, extremepressure additives, alkanolamines to provide Öreserve alkalinityÖ, a biocide such astriazine or oxazolidene, a defoamer such as a long chain organic fatty alcohol or salt, corrosion inhibitors, antioxidants, etc.
[87] [0087]subgroups: true solutions and surface active ﬂuids. True solution ﬂuids are composed Synthetic ﬂuids (chemical ﬂuids) can be further categorized into two essentially of alkaline inorganic and organic compounds and are forrnulated to impartcorrosion protection to water. Chemical surface-active ﬂuids are composed of alkalineinorganic and organic corrosion inhibitors combined with anionic non-ionic wettingagents to provide lubrication and improve wetting ability. Extreme-pressure lubricantsbased on chlorine, sulfur, and phosphorus, as well as some of the more recentlydeveloped polymer physical extreme-pressure agents can be additionally incorporated inthis ﬂuids. Semisynthetics ﬂuids(also called semi-chemical) contains a lower amount ofref1ned base oil (5-3 0%) in the concentrate. They are additionally mixed withemulsifiers, as well as 30-50% of water. Since they include both constituents ofsynthetic and so luble oils, characteristic properties common to both synthetics and water soluble oils are presented.
[88] [0088]well as a cutting insert assembly, to facilitate enhanced delivery of coolant adjacent the It is apparent that the present invention provides a cutting assembly, as interface between the cutting insert and the workpiece (i.e., the insert-chip interface).By doing so, there is a diminishment of excessive heat at the insert-chip interface in thechipforrning removal of material from a workpiece. By providing coolant ﬂow, there isa reduction in excessive heat at the insert-chip interface to eliminate or reduce build upof chip material. By providing the ﬂow of coolant to the insert-chip interface, theevacuation of chips from the insert-chip interface will be facilitated thereby minimizingthe potential that a chip will be re-cut. It is apparent the present invention provides advantages connected with decreasing the heat at the insert-chip interface _15-
[89] [0089] The patents and other documents identified herein are herebyincorporated by reference herein. Other en1bodin1ents of the inVention Will be apparentto those skilled in the art from a consideration of the specif1cation or a practice of theinVention disclosed herein. It is intended that the specification and examples areillustrative only and are not intended to be liniiting on the scope of the inVention. The true scope and spirit of the inVention is indicated by the following clain1s.

权利要求:
Claims (13)
[1] 1. A cutting assembly for the chipforming removal of material from a workpiece at the cutting insert-workpiece interface, the cutting assembly comprising:a holder containing a coolant passage and a seat; a stud being received within the coolant passage and extending awayfrom the seat; a cutting insert having a rake surface and a central aperture wherein the stud extends through the central aperture of the cutting insert; an insert locking cap engaging the stud and exerting a biasing forceagainst the rake surface of the cutting insert so as to securely retain the cutting insert inthe seat (60), the insert locking cap containing a side opening in communication withthe central aperture (188) of the cutting insert; and the stud containing an exterior longitudinal trough with an entrance inthe coolant passage and an exit adjacent the side opening whereby coolant flows fromthe coolant passage into the exterior longitudinal troughs exiting into the centralaperture of the cutting insert and passing into and spraying out of the side opening toward the cutting insert-workpiece interface.
[2] 2. The cutting assembly according to claim 1 wherein the stud having asmooth region wherein the smooth region contains the exterior longitudinal trough, and a portion of the smooth region of the stud being within the coolant passage.
[3] 3. The cutting assembly according to claim 2 wherein the smooth region contains a plurality of the longitudinal troughs.
[4] 4. The cutting assembly according to claim 1 wherein the stud can be selectively rotationally positioned to a pre-selected position in the coolant passage.
[5] 5. The cutting assembly according to claim 4 wherein the holder furthercontains a set screw bore that receives a set screw, and the set screw being movablebetween a fastening position in which the set screw firmly abuts against the stud to retain the stud in the pre-selected position in the coolant passage and an unfastening _17- position in which the set screw does not contact the stud whereby the stud is free to be selectively rotationally positioned in the coolant passage.
[6] 6. The cutting assembly according to claim 1 further including a shimhaving a central shim bore, and the stud passing through the central shim bore, and the shim being sandwiched between the cutting insert and the seat.
[7] 7. The cutting assembly according to claim 6 wherein the central shimbore being in communication with the central aperture of the cutting insert, and the exterior longitudinal trough being in communication with the central shim bore.
[8] 8. The cutting assembly according to claim 1 wherein the stud having athreaded region, and the insert locking cap threadedly engaging the stud at the threadedregion (130).
[9] 9. A cutting assembly for the chipforrning removal of material from a workpiece at the cutting insert-workpiece interface, the cutting assembly comprising:a holder containing a coolant passage and a seat; a threaded stud being threadedly received at a lower threaded section thereof within the coolant passage and extending away from the seat; a cutting insert having a rake surface and a central aperture wherein anupper threaded section of the threaded stud extends through the central aperture of the cutting insert; an insert locking cap engaging the upper threaded section of the threadedstud, and the insert locking cap exerting a biasing force against the rake surface of thecutting insert so as to securely retain the cutting insert in the seat, the insert locking capcontaining a transverse locking cap bore and an outer exit in communication with thetransverse locking cap bore, and the insert locking cap containing an exterior annular groove in communication with the transverse locking cap bore through the outer exit; a coolant ring being adjustably received on the insert locking cap so as to encompass the exterior annular groove, the coolant ring containing an interior groove _18- which together with the exterior annular groove forrns a coolant channel, and the coolant ring containing an opening in communication with the coolant channel; and the threaded stud containing a central longitudinal bore with an entrancein the coolant passage and an exit adj acent the transverse locking cap bore wherebycoolant flows from the coolant passage and into the central longitudinal bore exitinginto the transverse locking cap bore and passing into the coolant channel whereby coolant sprays out of the opening toward the cutting insert-workpiece interface.
[10] 10. The cutting assembly according to claim 9 wherein the coolant ringbeing adjustable so as to select the orientation of the coolant spraying out of the opening towards the cutting insert-workpiece interface.
[11] 11. The cutting assembly according to claim 9 further including a shimhaving a central shim bore, and the threaded stud passing through the central shim bore, and the shim being sandwiched between the cutting insert and the seat.
[12] 12. A diverter plate for use with a cutting assembly having a holdercontaining a coolant passage for the chipforming removal of material from a workpieceat the cutting insert-workpiece interface comprising a bottom surface wherein thebottom surface contains a bowl and an arcuate forward surface containing an opening;and coolant ﬂows from the coolant passage into the bowl then exiting through the opening in the arcuate forward surface towards the cutting insert-workpiece interface.
[13] 13. The cutting assembly according to claim 12 wherein the arcuate forward surface containing a plurality of the openings.

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同族专利:

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法律状态:
2016-09-27| NAV| Patent application has lapsed|

优先权:

申请号 | 申请日 | 专利标题

US13/679,435|US8734062B2|2010-09-02|2012-11-16|Cutting insert assembly and components thereof|

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