DE102013111852A1 - Cutting assembly for chipforming removal of chip material from workpiece at cutting insert-workpiece interface, has stud comprising exterior longitudinal trough with entrance in coolant passage and exit adjacent side opening of cap - Google Patents

Abstract

The assembly has a stud (120) extending through a central aperture (188) of a cutting insert (75). An insert locking cap engages the stud and exerts a biasing force against a rake surface of the insert to retain the insert in a seat. A side opening (110) of the cap is in communication with the aperture. The stud comprises an exterior longitudinal trough (134) with an entrance in a coolant passage and an exit adjacent the side opening. Coolant flows from the passage into the trough, and passes into and sprays out of the side opening toward a cutting insert-workpiece interface.

Description

CROSS-REFERENCE TO PREVIOUS PATENT APPLICATIONS

The present patent application is a continuation-in-part of pending US Patent Application Serial No. 12 / 874,591, entitled CUTTING INSERT ASSEMBLY AND COMPONENTS THEREOF on Sep. 2, 2010 by Chen et al. was submitted. Applicants hereby claim priority based on said US Patent Application Serial No. 12 / 874,591, entitled CUTTING INSERT ASSEMBLY AND COMPONENTS THEREOF on Sep. 2, 2010 by Chen et al. was submitted. Applicants also refer to said US Patent Application Serial No. 12 / 874,591, entitled CUTTING INSERT ASSEMBLY AND COMPONENTS THEREOF on Sep. 2, 2010 by Chen et al. was filed in total in this patent.

BACKGROUND OF THE INVENTION

The subject invention relates to a metal cutting machine, and more particularly to a metal cutting machine designed to allow improved delivery of coolant to the interface between the cutting insert and the workpiece (ie, insert-chip interface) to prevent excessive heat buildup on the insert chip To reduce margins in the chip-forming material removal of a workpiece. The subject invention further relates to components of such Metallzerspanungsanlagen. Such components include, for example, a locking pin, a clamp assembly, a holder, a shim, and a cutting insert.

Metal cutting tools for performing metalworking operations generally include a cutting insert having a surface that terminates at a cutting edge and a tool mount having a seat adapted to receive the insert. The cutting insert engages a workpiece to remove material and forms chips of the material during the process. Excessive heat buildup at the insert-chip interface can adversely affect (i.e., reduce or shorten) the tool life of the cutting insert.

For example, sometimes a chip generated from the workpiece may adhere (eg, by fusing) to the surface of the cutting insert. The accumulation of chip material on the cutting insert in this manner is undesirable and can adversely affect the performance of the cutting insert and thus the overall material removal process. A coolant flow to the insert-chip interface reduces the risk of such fusion. It would therefore be desirable to reduce excessive heat build up at the insert-chip interface to avoid or reduce the accumulation of chip material.

As another example, in a chip removal operation, the chips may not leave the insert-chip interface area when the chip is adhered to the cutting insert. If a chip does not leave the area of the insert-chip interface, it is possible that the chip will be cut again. It is not desirable for the milling insert to re-cut a chip already lifted from the workpiece. A coolant flow to the insert-chip interface facilitates the removal of chips from the insert-chip interface and thus minimizes the risk of a chip being cut again.

It is generally accepted that shorter tool life increases operating costs and reduces overall production efficiency. Excessive heat buildup at the insert-chip interface contributes to fusion of the chip material and re-cutting of chips, both of which are detrimental to production efficiency. Obvious benefits are associated with reducing heat buildup at the insert-chip interface, with one way to reduce the temperature being to add coolant to the insert-chip interface.

So far, plants are operated to lower the temperature of the cutting insert during cutting. For example, in some systems, external nozzles are used to transport coolant to the cutting edge of the insert. The coolant serves not only to lower the temperature of the insert, but also to remove the chips from the cutting area. The nozzles are often located at a distance of 2 to 30 centimeters (1 to 12 inches) from the cutting edge. This distance is too big for effective cooling. The farther the coolant travels, the more the coolant mixes with air and is less likely to hit the tool-chip interface.

The U.S. Patent No. 6,053,669 at Lagerberg entitled CHIP FORMING CUTTING INSERT WITH INTERNAL COOLING discusses the importance of reducing heat build-up at the insert-chip interface. Lagerberg mentions that when one made of cemented carbide Cutting insert reaches a certain temperature, its resistance to plastic deformation decreases. A decrease in resistance to plastic deformation increases the risk that the cutting insert will break. The U.S. Patent No. 5,775,854 at Wertheim entitled METAL CUTTING TOOL points out that an increase in the working temperature leads to a decrease in the hardness of the cutting insert. As a result, there is an increased wear of the cutting insert.

Other patent specifications disclose various options or equipment for supplying coolant to the feed-chip interface. For example, this concerns U.S. Patent No. 7,625,157 to Prichard et al. entitled MILLING CUTTER AND MILLING INSERT WITH COOLANT DELIVERY a cutting insert having a cutting body with a central coolant inlet. The cutting insert also has a positionable deflection piece. The diverter has a coolant channel that directs coolant to a specific interface.

The U.S. Patent No. 6,045,300 to Antoun, entitled TOOL HOLDER WITH INTEGRAL COOLANT PASSAGE AND REPLACEABLE NOZZLE, discloses providing high pressure, high volume coolant for combating heat buildup at the insert-chip interface. U.S. Patent No. 6,652,200 Kraemer, entitled TOOL HOLDER WITH COOLANT SYSTEM, discloses troughs between the cutting insert and a cover plate. Coolant flows through the channels to combat heat buildup at the insert-chip interface. U.S. Patent No. 5,901,623 to Hong, entitled CRYOGENIC MACHINING, discloses a coolant delivery system for applying liquid nitrogen to the feed-chip interface.

SUMMARY OF THE INVENTION

The inventor has recognized the problems associated with conventional cooling devices and developed an insert assembly that cooperates with a conventional cooling system to supply coolant to a cutting insert and solves the problems of the prior art.

In one embodiment thereof, the invention is a cutting assembly for chip removing material from a workpiece at the cutting insert-workpiece interface. The cutting assembly includes a bracket that includes a coolant channel and a seat. There is a bolt received in the coolant channel with the bolt extending away from the seat. The assembly further includes a cutting insert having an inclined surface and a central opening, the bolt extending through the central opening of the cutting insert. The assembly includes an insert lock cap that engages the pin and exerts a biasing force against the inclined surface of the cutting insert so that the cutting insert is securely held in place. The insert lock cap includes a side opening in communication with the central opening of the cutting insert. The bolt includes an outer longitudinal groove having an entrance in the coolant passage and an exit adjacent the lateral opening, whereby coolant flows from the coolant passage into the outer longitudinal grooves and exits into the central opening of the cutting insert and flows into and out of the lateral opening Cutting insert-workpiece interface is sprayed.

In another embodiment thereof, the invention is a cutting assembly for chip removing material from a workpiece at the cutting insert-workpiece interface. The cutting assembly includes a bracket that includes a coolant channel and a seat. The assembly includes a threaded bolt which is threadedly received in a lower threaded portion thereof in the coolant channel and extends away from the seat. The assembly includes a cutting insert having a sloped surface and a central opening with an upper threaded portion of the threaded bolt extending through the central opening of the cutting insert. There is an insert lock cap that engages the upper threaded portion of the threaded bolt, whereby the insert lock cap exerts a biasing force against the inclined surface of the cutting insert so that the cutting insert is securely held in place. The insert lock cap includes a locking cap transverse bore and an outer exit in communication with the locking cap transverse bore. The insert closure cap includes an outer annular groove communicating with the locking cap transverse bore through the outer outlet. An adjustable coolant ring is received on the insert lock cap to span the outer annular groove. The coolant ring includes an inner groove that forms a coolant passage together with the outer annular groove. The coolant ring includes an opening in communication with the coolant passage. The threaded bolt includes a central longitudinal bore having an entrance in the coolant passage and an exit proximate the locking cap transverse bore whereby coolant flows from the coolant passage and into the central longitudinal bore into the lock cap. Transverse bore exits and flows into the coolant channel, whereby coolant is sprayed from the opening in the direction of the cutting insert-workpiece interface.

In yet another embodiment, the invention is a baffle for use with a cutting assembly having a mount with a coolant channel for chip removing material from a workpiece at the cutting insert-workpiece interface. The baffle comprises a lower surface, the lower surface containing a trough. The baffle also includes a curved front surface having an opening (FIG. 380 . 452 ) contains. Coolant flows from the coolant channel into the trough and then exits through the opening in the curved front surface toward the cutting insert-workpiece interface.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings which form part of the present patent application are briefly described below:

Fig. 10 is an isometric view of a first specific embodiment of a cutting unit assembly;

FIG. 11 is a top view of the cutting unit assembly of FIG in which the cutting insert and the backing plate have been removed;

is a cross-sectional view of the cutting unit assembly of in which the cutting insert and the shim have been removed along the section line 3-3 of FIG ;

is a cross-sectional view of the cutting unit assembly of in which the cutting insert and shim have been removed, along section line 4-4 of FIG ;

FIG. 12 is a plan view of the shim forming part of the cutting unit assembly of FIG is;

is a cross-sectional view of the shim of along the section 6-6 of ;

FIG. 12 is a plan view of the round cutting insert forming part of the cutting unit assembly of FIG is;

is an isometric view of the round cutting insert of ;

is a cross-sectional view of the round cutting insert of along the section line 9-9 of ;

FIG. 11 is an isometric view of the insert lock cap forming part of the cutting unit assembly of FIG is;

is a side view of the insert lock cap of ;

is a cross-sectional view of the insert lock cap of along the section 12-12 of ;

is an isometric view of the bolt that is part of the cutting unit assembly of is;

is a plan view of the bolt of ;

is a cross-sectional view of the bolt along the section line 15-15 of ;

is an isometric view of the cutting unit assembly of showing the cutting unit assembly in a particular orientation;

FIG. 12 is a schematic cross-sectional view of a particular embodiment of the cutting unit assembly of FIG showing the path of the coolant;

Figure 11 is an isometric view of the insert lock cap forming part of a second specific embodiment of a cutting unit assembly;

is a side view of the insert lock cap of ;

is a plan view of the insert lock cap of ;

is a cross-sectional view of the insert lock cap of along the section line 21-21 of ;

22 Figure 11 is a side view of the coolant ring that is part of a second specific embodiment of a cutting unit assembly;

is a plan view of the coolant ring;

is a cross-sectional view of the coolant ring of along the section line 24-24 of ;

Figure 3 is an isometric view of a specific embodiment of a threaded bolt that is part of a second specific embodiment of a cutting unit assembly;

is a plan view of the threaded bolt of ;

is a cross-sectional view of the threaded bolt of along the section line 27-27 of ;

Figure 11 is an isometric view of the second specific embodiment of a cutting unit assembly illustrating the cutting unit assembly in a particular orientation with respect to the spraying of coolant toward the cutting insert-workpiece interface;

Figure 4 is an isometric view of the second specific embodiment of a cutting unit assembly, showing the cutting unit assembly in a different orientation with respect to the spraying of coolant toward the cutting insert-workpiece interface;

FIG. 12 is a schematic cross-sectional view of the second specific embodiment of the cutting unit assembly of FIG showing the path of the coolant through the cutting unit assembly;

Fig. 10 is an isometric view of a third specific embodiment of a cutting unit assembly;

is a plan view of the cutting unit assembly of ;

FIG. 10 is an isometric view towards the upper surface of a specific embodiment of a baffle plate for use in the third specific embodiment of the cutting unit assembly of FIG ;

is an isometric view in the direction of the lower surface of the specific embodiment of a baffle of ;

FIG. 10 is an isometric view of the terminal assembly of the third specific embodiment of FIG , wherein the baffle of shown remote from the screw-clamp arm assembly;

is a plan view of the baffle of ;

is a cross-sectional view of the shim of along the section line 36-36 of ;

is a bottom view of the baffle of ;

FIG. 10 is a plan view of a second specific embodiment of a baffle plate for use in the third specific embodiment of the cutting unit assembly of FIG ;

is a cross-sectional view of the baffle of along the section line 39-39 of ;

is a bottom view of the baffle of ;

is an isometric view towards the top surface of the baffle of ;

is an isometric view in the direction of the lower surface of the specific embodiment of a baffle of ;

is a schematic cross-sectional view of the third specific embodiment of a cutting unit assembly with the baffle of showing the path of the coolant through the cutting unit assembly;

Fig. 12 is a cross-sectional view of the retaining screw of the shim of the third specific embodiment of the cutting assembly;

FIG. 11 is a plan view of a round cutting insert for use in the third specific embodiment of the cutting unit assembly of FIG ; and

is a cross-sectional view of the round cutting insert of along the section line 45-45 of ,

DETAILED DESCRIPTION

In a chip removing machining operation, the cutting insert engages a workpiece to remove material from the workpiece, typically in the form of chips. A material removal process in which material is removed from the workpiece in the form of chips is commonly known to those skilled in the art as a chip removal process. The book Machine Shop Practice [Industrial Press Inc, New York, New York (1981)] by Moltrecht provides on pages 199-204, inter alia, a description of the Chip formation as well as various types of chip (ie, chipboard, chipped chipboard, chipboard). At Moltrecht, it is [partially] read on pages 199-200: "When the cutting tool touches the metal for the first time, it compresses the metal in front of the cutting edge. As the tool advances, the metal is biased in front of the cutting edge to the point where it shears internally, causing the grains of metal to deform and plastically flow along a plane, the so-called scissor plane ... When the machined metal is malleable if, for example steel, the chip runs off as an unbroken band ... ". Moltrecht later describes the formation of a chipped chip and a tear chip. As another example, the text on pages 302-315 of the ASTE Tool Engineers Handbook, McGraw Hill Book Co., New York, New York (1949) a detailed description of chip formation during metal cutting. On page 303, the ASTE manual provides a clear link between chip formation and machining operations such as turning, milling, and drilling. The following patent documents discuss the formation of chips in material removal operations: U.S. Patent No. 5,709,907 to Battaglia et al. (granted to Kennametal Inc.), U.S. Patent No. 5,722,803 to Battaglia et al. (granted to Kennametal Inc.), U.S. Patent No. 6,161,990 to Oles et al. (granted to Kennametal Inc.).

Reference is now made to the drawings, including without limitation the - ; a first specific embodiment of a cutting unit assembly is generally with 50 designated. The cutting unit assembly 50 has a holder 52 on, which is a front end of work 54 and a back end 56 has. The holder 52 has an enlarged headboard 58 , the front end of work 54 is adjacent and the a seat surface or a seat 60 which is designed to be a shim 74 and a cutting insert 75 take, with the shim 74 and the cutting insert 75 at the seat 60 are attached, as will be described below. The seat 60 is from an upright, semicircular wall 62 surrounded at an angle of 90 degrees relative to the surface of the seat 60 is arranged, with the wall 62 in one direction a support for the shim 74 and the cutting insert 75 Provides when on the seat 60 be arranged and attached to this. The holder 52 also has a shaft 64 at the rear end 56 of it. The cutting unit assembly is attached to the shaft 64 attached to a larger machine tool.

The holder 52 also includes a coolant channel 66 , the one entrance 68 near the shaft 64 and an exit 70 at the seat 60 has. As will be described later, pressurized coolant passes through the inlet 68 in the coolant channel 66 and enters through the exit 70 at the seat 60 directly into the component assembly containing the insert lock cap 80 , the bolt 120 , the shim 74 and the cutting insert 75 includes. Coolant exits this cutting unit assembly and encounters the interface between the cutting insert and the workpiece, ie, the cutting insert-workpiece interface. The holder 52 has a set screw hole 78 on, which is a set screw 76 receives, with the set screw 76 contributes to the bolt 120 to hold in position, as will be described below.

Reference is now made to the drawings, including without limitation the and ; the shim 74 the cutting insert assembly 50 further comprises a shim body 158 on, wherein the Unterlegplattenkörper 158 an upper surface 160 and a lower surface 162 has. The shim body 158 also has a central shim hole 164 on, the one entrance 168 and an exit 166 has. The central shim hole 164 has a section with enlarged diameter 170 near the exit 166 and a reduced diameter section 172 near the entrance 168 , The section of enlarged diameter 170 and the reduced diameter section 172 are through a frusto-conical section 174 connected.

Reference is now made to the drawings, including without limitation the - ; the cutting insert 75 the cutting unit assembly 50 has a round cutting insert body 180 on, which has a sloped surface 182 , a lateral surface 184 and a lower surface 186 has. At the joint between the inclined surface 182 and the side surface 184 is a cutting edge 187 available. The round cutting insert body 180 contains a central hole 188 that have an entrance 190 and an exit 192 having. The central hole 188 also has an upper part 194 that's the exit 192 is adjacent and has an enlarged diameter, and a lower part 196 , the entrance 190 is adjacent and has a reduced diameter.

As will become apparent, the cutting insert assembly has 50 an insert lock cap 80 and the bolt 120 put on the shim together 74 and the cutting insert 75 on the bracket 52 hold tight. The assembly with the insert lock cap 80 and the threaded bolt 120 also provides a means through which coolant flows to the cutting insert-workpiece interface. Reference is now made to the drawings, including without limitation the - ; the insert lock cap 80 has an axial front end 82 and an axially rear end 84 , The insert lock cap 80 has a headboard 86 near the axially front end 82 , where the headboard 86 a plurality (eg six) flats 88 having. These flattenings 88 facilitate the attachment of the insert lock cap 80 at the intended position. The insert lock cap 80 has a shaft part 92 near the axially rear end 84 , The shaft part 92 has a shoulder 94 on, the headboard 86 and the shaft part 92 combines. The shaft part 92 also has a cylindrical surface 96 and a frusto-conical surface 98 , The insert lock cap 80 contains a central locking cap hole 100 that have an entrance 102 and an exit 104 has. Part of the central locking cap hole 100 has threads 106 on. The insert lock cap 80 also has a recessed part 108 on top of an integrated opening 110 and an arcuate projection 112 Are defined. The integrated opening 110 is in communication with the lock cap bore 100 ,

Reference is now made to the drawings, including without limitation the - ; the threaded bolt 120 has an axial front end 122 and an axially rear end 124 , The bolt 120 has an upper part with a reduced diameter 126 near the axially front end 122 and a lower part of reduced diameter 128 near the axially rear end 124 , The outer surface of the bolt 120 has a threaded area 130 and an area with a smooth surface 132 on. The area with a smooth surface 132 has a triad of longitudinal channels 134 on. Each longitudinal channel 134 has an entrance 142 and an exit 144 , The threaded area 130 meets a shoulder 136 on the smooth area 132 as in and shown. Each of the longitudinal channels 134 has an arcuate channel surface 138 , An arcuate surface or bridge 140 in the area with a smooth surface 132 separates the individual longitudinal channels 134 from each other. The threaded bolt 120 points at the axially front end 122 a hexagonal, closed hole 148 on. The hexagonal, closed hole 148 has an opening 150 and a final surface or end 152 on.

Reference is now made to the drawings, including without limitation the - ; the assembly and operation of the first specific embodiment of the cutting unit assembly 50 are described below.

Figure 3 is a schematic cross-sectional view of the assembly showing the path of the coolant (as shown by the arrows) from the coolant channel 66 and through the assembly of central locking cap 100 - Bolt 120 - Washer 74 - cutting insert 75 shows. Coolant, which is usually under pressure, flows from the coolant channel 66 through the outer longitudinal channels 134 of the threaded bolt 120 in an upward direction as indicated by the arrows in FIG specified. The coolant exits the outlets 144 (at the top as in shown) of the outer longitudinal grooves 134 into the volume of the central shim hole 164 and at least a portion of the volume of the central opening 188 of the cutting insert 75 out. Coolant flows continuously into the recessed part 108 the insert lock cap 80 and presses through the side opening 110 so that it is sprayed towards the cutting insert-workpiece interface.

The position of the threaded bolt 120 can be turned into a preselected position by turning the bolt 120 in the coolant channel 66 is rotated to the desired position. The bolt 120 can then be secured in this position by adjusting the adjusting screw 76 is tightened until the set screw 76 firmly on the threaded bolt 120 is applied. The insert cap 80 gets at the threads 106 on the threaded area 130 of the bolt 120 screwed on so that the insert lock cap 80 is tightened and a significant compression bias against the cutting insert 75 acts, reducing the cutting insert 75 and the shim 74 safe on the seat 60 the holder 52 be held. More special is the cutting insert 75 between the insert lock cap 80 and the shim 74 between the cutting insert 75 and the seat or seat surface 60 arranged.

shows the coolant jet (KS) in one direction. As described above, it can be appreciated that the direction of the coolant jet varies with the position of the bolt 120 in the coolant channel 66 can change. By changing the direction of the coolant jet, various cutting applications can be accommodated.

Reference is now made to the drawings, including without limitation the - ; A second specific embodiment of a cutting unit assembly is shown in FIG generally with 200 is called and a holder 201 having a coolant channel 202 contains, wherein the coolant channel 202 a threaded section 203 near the seat 205 has. A threaded bolt 278 arrives near the exit thereof with the coolant channel 202 in threaded engagement. The threaded bolt 278 extends through the shim 74 and the cutting insert 75 , An insert lock cap 224 is on the threaded bolt 278 attached, and one Coolant ring 204 spans the insert lock cap 224 , The details of the cutting unit assembly 200 are described below.

The cutting unit assembly includes a threaded bolt 278 who has an axial front end 280 and an axially rear end 282 has. The threaded bolt 278 has a lower section of increased diameter 286 as well as an integrated flange 288 and has a forward-facing shoulder 300 and a shoulder pointing backwards 302 , The threaded bolt 278 also has an upper part with a reduced diameter 304 , which has a lower threaded area 306 having. The threaded bolt 278 has a central longitudinal bore 312 that have an entrance 314 and an exit 316 has. The central longitudinal bore 312 has a circular section 318 and a hexagonal section 320 ,

The cutting unit assembly 200 also has an insert lock cap 224 on, which has an axial front end 226 and an axially rear end 228 has. The insert lock cap 224 also has a headboard 230 and a shaft part 232 , The headboard 230 has a cylindrical part with a reduced diameter 234 and a cylindrical part of increased diameter 236 passing through a frusto-conical shoulder 238 connected to each other. The headboard 230 also includes an annular groove 240 , The headboard 230 also has threads 231 , The shaft part 232 has a cylindrical section 246 up in a frustoconical section 248 ends. The insert lock cap 224 includes a locking cap longitudinal bore 252 that have an entrance 254 and an inner final surface 256 contains. The insert lock cap 224 also has a locking cap transverse bore 260 that have an internal entrance 262 and an external output 264 has. The insert lock cap 224 has an upper, closed, sinusoidal bore 268 that have an entrance 270 and a final surface 272 has.

The cutting unit assembly 200 also has a coolant ring 204 on top of that 206 and a bottom 208 has. The coolant ring 204 also has an outer surface 210 and an inner volume 212 , wherein in the coolant ring 204 an opening 214 located. The coolant ring 204 also has an inner groove 216 on. It can be seen that the inner groove 216 of the coolant ring 204 with the annular groove 240 the insert lock cap 224 cooperates to form a coolant channel 222 to build. The coolant ring 204 gets at the threads 231 over internal, very fine thread on the insert lock cap 224 screwed.

Reference is made to the drawings and without limitation ; is a schematic cross-sectional view showing the path of the coolant in the coolant channel 202 through the assembly of coolant ring 204 - Insert lock cap 224 - threaded bolt 278 - cutting insert 75 - Washer 74 shows. In this type of module, the coolant is usually under pressure, so that coolant into the coolant channel 202 into and out of this into the entrance 314 the central longitudinal bore 312 of the threaded bolt 278 flows. Coolant occurs at the outlet 316 of which from the central longitudinal bore 312 and then flows through the inner entrance 262 of which into the locking cap transverse bore 260 , Thereafter, coolant enters the locking cap transverse bore 260 and continues to flow into the coolant channel 222 , causing coolant from the opening 214 is sprayed out toward the cutting insert-workpiece interface.

The insert lock cap 224 gets so far into the threaded section 306 of the threaded bolt 278 screwed in that they have a bias against the cutting insert 75 exerts and thereby both the cutting insert 75 as well as the shim 74 safely on the seat 60 holds. The threaded bolt 278 gets into the coolant channel 202 screwed. By varying the degree in which the coolant ring 204 on the insert lock cap 224 screwed on, the coolant ring can 204 changing positions with respect to the insert closure cap 224 to thereby align the opening 214 and thus also to vary the direction of the coolant jet.

It will now be referred to ; a third specific embodiment of the cutting unit assembly is generally with 322 denotes and has a holder 329 on, which is a front end 323 and a back end 324 has. The holder 329 has a seat 325 on and contains a coolant channel 326 who has an exit 327 and an entrance 328 has. The exit 327 of the coolant channel 326 is at the seat 325 arranged.

The cutting unit assembly further includes a baffle 330 on top, which has a top surface 332 , a lower surface 334 , a back end 336 , a front end 338 , a lateral surface 340 and an opposite side surface 342 has. The baffle plate 330 contains in the upper surface 332 a longitudinal groove 346 and a transverse groove 348 , The baffle plate 330 also has a central inclined surface 350 , a lateral inclined surface 352 , a lateral inclined surface 354 and an arcuate front surface 356 , The lateral surface 340 has a lateral groove 358 on, which has a bevelled surface 362 and a straight surface 364 having. The lateral surface 342 has a lateral groove 360 on, which has a bevelled surface 366 and a straight surface 368 having. The lower surface 334 the baffle plate 330 defines a tub 372 partly through a semicircular wall 374 and a pair of opposing widened walls 376 in 378 is defined. The tub 372 also has an opening 380 ,

The cutting unit assembly 322 also has a round cutting insert body 384 on, which has a sloped surface 386 , a lateral surface 388 and a lower surface 390 has. The round cutting insert body 384 contains a central hole 392 that have an entrance 394 and an exit 396 has. The central hole 392 has a generally constant diameter. The cutting unit assembly 322 also uses a shim 74 similar to the shims described earlier 74 , It will now be referred to ; the cutting insert assembly 322 also has a retaining screw of the shim 456 , The retaining screw of the shim 456 has a central longitudinal bore 458 , a flange 460 and a threaded part 462 ,

The baffle plate 330 is on the terminal board 398 using tines 400 attached to the side grooves 358 . 360 with the baffle plate 330 engage. This type of connection allows the baffle 330 depending on the specific application.

It will now be referred to ; the shim 74 is on the seat 325 arranged and the retaining screw of the shim 456 is threadedly engaged in a threaded portion of the coolant channel 326 added. The flange 460 the retaining screw of the shim 456 engages the frusto-conical portion 174 the shim 74 to the shim 74 at the seat 325 hold. The cutting insert 384 lies on top of the shim 74 on. The baffle plate 330 is through the terminal assembly 398 pressed down and is against the inclined surface of the cutting insert 384 preloaded to the cutting insert 384 to hold on to his position. Then coolant flows through the coolant channel 326 and into the central longitudinal bore 458 the retaining screw of the shim 456 , The coolant then flows through the central bore 392 of the cutting insert 384 , The coolant hits the surface of the tub 372 the baffle plate 330 , where the coolant through the opening 380 towards the cutting insert-workpiece interface from the trough 372 exit.

Reference is now made to the - ; a further specific embodiment of the baffle plate 402 has an upper surface 404 , a lower surface 406 , a back end 408 , a front end 410 and a pair of opposing side surfaces 412 . 414 on. The upper surface 404 the baffle plate 402 contains a longitudinal groove 418 and a transverse groove 420 , The upper surface 404 also has a central inclined surface 422 and a pair of opposing side inclined surfaces 424 . 426 on. Furthermore, the baffle plate 402 an arcuate front surface 428 on. The lateral surface 412 has a lateral groove 430 on, which has a bevelled surface 434 and a straight surface 436 having. The lateral surface 414 has a lateral groove 432 on, which has a bevelled surface 438 and a straight surface 440 having. The lower surface 406 the baffle plate 402 contains a tub 444 partly through a semicircular wall 446 in the pair of opposite, widened walls 448 . 450 is defined. It is a plurality of openings 452 present, which is a communication connection from the tub 444 to deploy out.

It will be appreciated that any one of a plurality of different types of fluids or coolants is suitable for use in the cutting insert. Generally speaking, there are two basic categories of fluids or coolants, namely, oil-based fluids that include bland oils and soluble oils, and chemical fluids that include synthetic and semi-synthetic refrigerants. Blank oils are composed of a basic mineral or -erdöl and often contain polar lubricants such as fats, vegetable oils and esters as well as high-pressure additives chlorine, sulfur and phosphorus. Soluble oils (also called emulsion fluid) are composed of a base of petroleum or mineral oil in combination with emulsifiers and mixing agents. Natural or mineral oils in combination with emulsifiers and mixing agents are the basic components of soluble oils (also known as emulsifiable oils). The concentration of the listed ingredients in their aqueous mixture is usually 30-85%. As a rule, soaps, wetting agents and couplers are used as emulsifiers whose basic function is to reduce the surface tension. They can be the reason that a fluid tends to foam. In addition, soluble oils may contain lubricity agents such as esters, extreme pressure additives, alkanolamines to provide reserve alkalinity, a biocide such as triazine or oxazolidine, a defoamer such as a long chain organic fatty alcohol or salt, corrosion inhibitors, antioxidants, etc.

Synthetic fluids (chemical fluids) can also be classified into two subgroups: true solutions and surface-active fluids. Genuine solution fluids consist essentially of alkaline inorganic and organic Compositions and are formulated to impart anti-corrosion properties to water. Chemical surfactant fluids are comprised of alkaline inorganic and organic corrosion inhibitors in combination with anionic nonionic wetting agents to provide lubrication and improve wettability. High pressure lubricants based on chlorine, sulfur and phosphorus as well as some recently developed high pressure polymeric physical agents may additionally be incorporated into these fluids. Semi-synthetic fluids (also called semi-chemical) contain a lower amount of refined base oil (5-30%) in the concentrate. They are additionally mixed with emulsifiers and 30-50% water. Because they contain components of synthetic as well as soluble oils, they have characteristic properties of both synthetic and water-soluble oils.

It will be appreciated that the present invention provides a cutting assembly and a cutting insert assembly to enable improved delivery of coolant to the interface between the cutting insert and the workpiece (i.e., the insert-chip interface). In this way, there is a reduction of excessive heat development at the insert-chip interface in the chip-forming material removal of a workpiece. By providing a coolant flow, excessive heat buildup at the insert-chip interface is reduced to avoid or reduce accumulation of chip material. By providing the coolant flow to the insert-chip interface, removal of the chips from the insert-chip interface is facilitated, thus minimizing the risk of re-cutting a chip. It will be appreciated that the present invention provides advantages in connection with reducing heat buildup at the insert-chip interface.

The patent and other documents cited herein are incorporated by reference herein as being incorporated into this patent. Other embodiments of the invention will be apparent to those skilled in the art from a consideration of the specification or practice of the invention set forth herein. It is intended that the specification and examples be illustrative only and not intended to limit the scope of the invention. The actual scope and spirit of the invention are described by the following claims.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• US 6053669 [0008]
• US 5775854 [0008]
• US 7625157 [0009]
• US 6045300 [0010]
• US 6652200 [0010]
• US 5901623 [0010]
• US 5709907 [0063]
• US 5722803 [0063]
• US 6161990 [0063]

Cited non-patent literature

• Machine Shop Practice [Industrial Press Inc, New York, New York (1981)] by Moltrecht [0063]
• ASTE Tool Engineers Handbook, McGraw Hill Book Co., New York, New York (1949) [0063]

Claims (13)

A cutting assembly for chip removing material from a workpiece at the cutting insert-workpiece interface, the cutting assembly comprising: a support having a coolant channel and a seat; a bolt received in the coolant channel and extending away from the seat; a cutting insert having a sloped surface and a central opening, the bolt extending through the central opening of the cutting insert; an insert lock cap that engages the pin and exerts a biasing force against the inclined surface of the cutting insert so that the cutting insert is securely seated ( 60 ), wherein the insert lock cap includes a side opening communicating with the central opening (10). 188 ) of the cutting insert is; and wherein the bolt includes an outer longitudinal groove having an entrance in the coolant passage and an exit adjacent the lateral opening, whereby coolant flows from the coolant passage into the outer longitudinal grooves and exits into the central opening of the cutting insert and into and out of the lateral opening Direction of the cutting insert-workpiece interface is sprayed. The cutting assembly of claim 1, wherein the bolt has a smooth portion, the smooth portion including the outer longitudinal groove, and wherein a portion of the smooth portion of the bolt is disposed within the coolant channel. The cutting assembly of claim 2, wherein the smooth portion includes a plurality of the longitudinal grooves. The cutting assembly of claim 1, wherein the pin is selectively rotatable to a preselected position in the coolant channel. The cutting assembly of claim 4, wherein the holder further includes a set screw hole receiving a set screw, and wherein the set screw between a fastening position, in which the set screw firmly against the bolt to hold the bolt in the preselected position in the coolant channel, and a releasing position in which the adjusting screw does not touch the bolt, whereby the bolt is free to be selectively rotatably adjusted in the coolant passage, is movable. The cutting assembly of claim 1, further comprising a shim having a central shim bore, and wherein the bolt extends through the shim central bore and wherein the shim is disposed between the cutting insert and the seat. The cutting assembly of claim 6, wherein the central shim bore is in communication with the central opening of the cutting insert and the outer longitudinal groove is in communication with the central shim bore. The cutting assembly of claim 1, wherein the bolt has a threaded portion, and wherein the insert lock cap is secured to the threaded portion (10). 130 ) comes into threaded engagement with the bolt. A cutting assembly for chip removing material from a workpiece at the cutting insert-workpiece interface, the cutting assembly comprising: a bracket with a coolant channel and a seat; a threaded bolt received on a lower threaded portion thereof in threaded engagement in the coolant passage and extending away from the seat; a cutting insert having a sloped surface and a central opening, an upper threaded portion of the threaded bolt extending through the central opening of the cutting insert; an insert lock cap which engages the upper threaded portion of the threaded stud, and wherein the insert lock cap exerts a biasing force against the inclined surface of the cutting insert to securely hold the cutting insert in the seat, the insert lock cap having a locking cap transverse bore and an outer exit formed in Communication port with the locking cap transverse bore is, and wherein the insert locking cap an outer annular groove, which communicates through the outer output in communication with the locking cap transverse bore contains; a coolant ring adjustably received on the insert lock cap so as to surround the outer annular groove, the coolant ring including an inner groove forming a coolant passage together with the outer annular groove, and wherein the coolant ring includes an opening is in communication with the coolant channel; and wherein the threaded bolt includes a central longitudinal bore having an entrance in the coolant passage and an exit adjacent the locking cap transverse bore, whereby coolant flows from the coolant passage and into the central longitudinal bore, exits into the locking cap transverse bore and flows into the coolant passage, thereby removing coolant from the passage Opening in the direction of the cutting insert-workpiece interface is sprayed. The cutting assembly of claim 9, wherein the coolant ring is adjustable so that the direction in which the coolant is sprayed from the opening toward the cutting insert-workpiece interface can be selected. The cutting assembly of claim 9, further comprising a backing plate having a central shim bore, and wherein the threaded bolt extends through the central shim bore and wherein the shim is disposed between the cutting insert and the seat. A diverter plate for use with a cutting assembly having a holder with a coolant channel for chip removing material from a workpiece at the cutting insert-workpiece interface comprising a bottom surface, the bottom surface having a trough and an arcuate front surface containing an opening , having; and wherein coolant flows from the coolant channel into the trough and then exits through the opening in the curved front surface toward the cutting insert-workpiece interface. The cutting assembly of claim 12, wherein the arcuate front surface includes a plurality of the openings.

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