JP2004174691A - Cutter for mirror finishing resin material end surface and mirror finishing device of resin material end surface furnished with this cutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simultaneously carry out rough machining and mirror finishing of an end surface of a resin made work at a high speed and to carry out the mirror finishing while preventing generation of a knife mark. <P>SOLUTION: This cutter is furnished with diamond made chips 4 for rough machining arranged with constant intervals on an outer peripheral part of a boss part body of a front milling cutter, a plurality of cutout parts formed at symmetrical positions between the chips 4 for rough machining and diamond chips for finishing arranged at least on one of the cutout parts. Blade parts of the chips for finishing are projected by a cutting amount for finishing to the inner peripheral side and the axially outward from the chips 4 for finishing and rough machining, and a flat surface type chamfering part 4f of 0.1∼0.2 mm in width is formed on an outer peripheral blade 4a formed between a main rake face 4c and an outer peripheral flank 4d of the chip 4 for rough machining. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a mirror finishing cutter for a plastic material and a mirror finishing device for a resin material end surface for simultaneously performing rough cutting and mirror finishing of a cut surface and an end surface of a plastic plate by a face mill.
[0002]
[Prior art]
For example, Patent Document 1 has been proposed as a machine for finish-cutting an end surface of a soft material such as a resin plate or an aluminum plate. This Patent Document 1 discloses that, when a resin plate is linearly moved at a constant speed and an end surface of the resin plate is machined by a cutting blade attached to the rotating body, the blade surface of the cutting blade is slightly moved with respect to the rotation axis of the rotating body. In addition to the inclined umbrella blade vertical cutter, the blade surface of the cutting blade is configured to be in line with the end surface of the resin plate, so that an arc-shaped blade mark is not left on the cutting surface. .
[0003]
[Patent Document 1]
JP 2001-334404 A
[Problems to be solved by the invention]
The phenomenon that an arc-shaped blade mark (called a knife mark) remains on the cutting surface generally occurs when the cutting angle is small and the cutting depth is small in shear-type cutting, and since the cutting blade is acute, When the compressed pressure of the work exceeds a predetermined value, the cutting edge slides along the surface along the depth direction and deforms so that it cuts deeper than the cutting surface, and the cutting edge returns to its original position at the deformation limit It is said that a knife mark is formed by being cut from a cutting surface due to vibrations repeatedly deforming and returning. For example, in general, a cutter knife is a double-sided blade having a blade surface formed on both surfaces, but when this is cut as a single blade having a blade surface formed on only one surface, cutting a soft material, a side having no blade surface is formed. This phenomenon is explained by being cut into the body.
[0005]
In the cited document 1, the cutting surface of the cutting blade is brought into line contact with the end surface of the work, and it is presumed that the cutting surface is the same as that of the cutting edge of the umbrella blade vertical cutter. However, since the angle of the umbrella blade is minute, it is considered that a shallow vertical knife mark perpendicular to the direction of transporting the work is formed. Although a shallow knife mark is difficult to confirm with a normal opaque soft material, light transmitted through the end face is refracted at the end face of a transparent resin material, so that a slight knife mark can be seen clearly.
[0006]
Also, in the cited document 1, the end face of the work which has been roughly cut by about 0.3 to 0.5 mm is reduced to about 0.05 mm (the cut surface cannot be directly mirror-finished unless rough cutting is performed with this cutting amount). Although mirror finishing is performed by cutting, there is a problem that work efficiency is low because two processing steps of rough cutting and mirror finishing are required.
[0007]
SUMMARY OF THE INVENTION The present invention solves the above problems, and enables a rough cutting and a mirror finishing to be performed simultaneously at a high speed, and a mirror for a mirror finishing of an end face of a plastic material capable of performing a mirror finishing without generating a knife mark, and a mirror finishing tool for the same. It is an object of the present invention to provide a mirror finishing device having a cutter.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 is formed at a symmetrical position between a rough cutting tip made of diamond, which is disposed at regular intervals on an outer peripheral portion of a cutter body of a face mill, and the leading blade. A plurality of notches, and a diamond finishing tip disposed in at least one of the notches, the cutting edge of the finishing tip, on the inner peripheral side than the cutting edge of the rough cutting tip, And, according to the finishing amount, the rough cutting tip is projected axially outward from the cutting edge of the rough cutting tip by the finishing cutting amount, and the width of the outer peripheral blade formed between the main rake face and the outer peripheral flank of the rough cutting tip is Has a flat chamfer of 0.1 to 0.2 mm.
[0009]
According to the above configuration, by forming a corner portion of 0.1 to 0.2 mm on the outer peripheral edge of the rough cutting tip, at the time of rough cutting, the resin is compressed and the cutting edge of the rough cutting tip is directed obliquely forward. The cutting edge returns to its original shape at the deformation limit due to sliding along the cutting edge, and the repetition of this prevents shear-type cutting in which an arcuate knife mark is generated, and the cutting part generates heat due to frictional resistance Shape cutting can be prevented, and good mirror finishing without knife marks can be performed by finish cutting with the next finishing tip. In addition, since the end face can be rough-cut with a plurality of roughing tips and the end face can be mirror-finished at a high speed with the finishing tip, the conventional mirror surface that required rough cutting, finish cutting, and buffing Compared with the finishing process, the number of processing steps can be reduced by half, and the processing speed can be doubled to reduce the processing time by a fraction.
[0010]
According to a second aspect of the present invention, there is provided a cutter for mirror finishing a resin material according to the first aspect, wherein the cutter is rotationally driven by a rotary driving device for processing at a predetermined position of a processing line provided along a processing table; A receiving conveyor having a receiving endless rotating body for supporting a work from below on a processing table along a processing line, and a pressing conveyor having a pressing endless rotating body for pressing the work from above facing the upper part of the receiving conveyor. And an urging means for urging the holding endless rotating body toward the conveyor side to hold the plastic work, and providing a work transfer device capable of continuously transferring the work.
[0011]
According to the above configuration, the work can be reliably conveyed continuously while being firmly held by the urging means while being sandwiched between the receiving conveyor and the holding conveyor, and roughing and mirror finishing can be accurately performed by the mirror finishing cutter. it can. Further, compared with the conventional method in which the work is transported by reciprocating the clamp device, a step of returning the clamp device is not required, and the work can be continuously transported efficiently and the processing time can be greatly reduced.
[0012]
According to a third aspect of the present invention, the rough cutting tip and the finishing tip of the mirror finishing cutter are cut from the upper side to the lower side with respect to the end surface of the work conveyed along the processing line by the work conveying device. With the cutting angle at which the roughing insert passes through the lower side and the cutting angle perpendicular to the lower side of the cutting force, the cutting force and the processing line position are set so that the cutting force perpendicular to the lower side is small. It is.
[0013]
According to the above configuration, since the cutting component force perpendicular to the lower side can be reduced, chipping that occurs when the cutting edge passes through the lower side can be prevented beforehand, and favorable end face finishing can be performed.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Here, embodiments of a cutter for mirror finishing of a resin material end surface and a mirror finishing device according to the present invention will be described with reference to the drawings.
[0015]
First, as shown in FIG. 1 to FIG. 3, the mirror finishing cutter 10 is a front milling machine that cuts an end surface of a resin-made work at the front, and a tip of a boss portion main body (cutter main body) 1 having a mounting boss hole 1 a. An annular cutter face plate 2 (cutter body) is mounted on the front surface of the flange portion 1b, and polycrystalline diamond (referred to as a “Compax diamond”) is provided between chip pockets 3 formed at regular intervals on the outer peripheral portion of the cutter face plate 2. ) Are mounted (10 to 20). A pair of notches 5 are formed in the cutter face plate 2 and the tip flange portion 1b at symmetrical positions between the rough cutting chips 4, and mounting grooves 6 are formed in the boss body 1 corresponding to the notches 5. Each is formed. A finishing bit 8 having a single crystal diamond finishing tip 7 at the tip of a shank body 8a is mounted in one of the mounting grooves 6 through a posture adjusting mechanism 9 so as to be freely adjustable in posture. Reference numeral 7 protrudes from the notch portion 5 to the outside (tip side) in the direction of the rotation axis O by the finish cutting amount from the rough cutting tip 4. In the other mounting groove 6, the cutting speed can be increased by similarly mounting the finishing bit 8, but the adjustment of the cutting edge of the finishing tip 7 with respect to the rough cutting tip 4 becomes extremely delicate, Here, a shank-shaped balance weight 11 for preventing uneven rotation of the mirror finishing cutter 10 is attached.
[0016]
As shown in FIGS. 4A and 4B, the finishing chip 7 has a horizontal cutting edge 7a having a rake face land R of 0.2R, for example, and a front cutting edge 7b substantially parallel to the rotation axis. are doing. The rake surface land R is for preventing the surface of the work from being scratched. As shown in FIG. 3, the posture adjusting mechanism 9 of the finishing chip 7 is mounted on guide screws 9b mounted on the long holes 8b of the shank 8a and on screw holes of the base flange portion 1b of the boss body 1. The extension / retraction position is adjustable in the direction of the rotation axis O by the extension / retraction adjustment screw 9c. Further, the shank 8 for finishing is tilted back and forth in the rotation direction via a guide screw 9b by a pair of front and rear tilt adjustment screws 9d and 9d mounted on a tangential screw hole passing through the shank mounting groove 6 in the boss body 1. At the same time, the finishing shank 8 is moved relative to the rotation axis O by the side inclination adjusting screws 9e, 9e attached to the screw holes 8c, 8c on the distal side and the proximal side of the long hole 9a of the finishing shank 9 respectively. It is configured so that it can be tilted inward and outward to adjust the attitude of the mirror finishing cutter 10.
[0017]
As shown in FIGS. 5A to 5D, each of the rough cutting tips 4 has an outer peripheral edge (also referred to as a main cutting edge) 4a formed between a main rake face 4c and an outer peripheral flank 4d. A side blade (also referred to as an auxiliary cutting edge) 4b is formed between the surface 4c and the side flank 4e. Here, a positive front cutting edge angle: α is provided on the main rake face 4 e with respect to the outer peripheral blade 4 a, and an axial rake angle: αo is provided on the main rake face 4 c with respect to the side blade 4 b. Further, an outer peripheral cutting edge angle: γ is provided on the outer peripheral flank 4d with respect to the outer peripheral blade 4a, and an axial flank angle: γa is formed on the side flank 4e with respect to the side blade 4b. αr is the radial rake angle, and γr is the radial clearance angle.
[0018]
By the way, in the case of a face mill using a cemented carbide tip intended for a steel work using a cemented carbide tip, a negative rake angle is often used in order to make the cutting edge strong, but a negative rake angle is often used. Since the cutting force increases at the rake angle, a two-step rake face is formed by forming a corner. Here, the width of the negative primary rake angle (land) portion is about 1.5 times the feed per tooth.
[0019]
When cutting a resin-made work, the front and back surfaces of the work are usually covered with a cover paper or the like. In order to cut the cover paper well with the resin, for example, the cutting edge angle of the outer peripheral blade 4a: ε = 90 ° − (Front cutting edge angle α + outer cutting edge angle γ) is an acute angle of 75 °. Thus, in cutting resin, the outer cutting edge 4a is generally made to be an acute angle.
[0020]
However, according to the experiment of the inventor, in the case of the outer peripheral blade 4a having an acute angle, although the cover paper and the like are cut well, the work is compressed and deformed with the advance of the cutting edge because the cutting angle is small. When it reaches, shear-type cutting that causes slip along the surface diagonally forward from the cutting edge is performed. After the chips have been separated, the cutting edge returns to its original position, and this is repeated, resulting in minute vibrations, resulting in arc-shaped knife marks on the cutting surface.
[0021]
Here, the present inventor has found that by forming a flat chamfered portion 4f with a width in the range of 0.1 to 0.2 mm on the acute-angled outer peripheral blade 4a, a good cut surface without knife marks can be formed. I found it. This is because if the width of the chamfered portion 4f is less than 0.1 mm, it becomes a shearing type cutting and an arc-shaped knife mark remains. This is because the work increases to 70 ° C. or more due to frictional heat and the cut surface is melted, and the cover paper is not cut well. The chamfered portion 4f can prevent a cut surface from being damaged and form a smoother cut surface. By setting the angle of inclination of the chamfered portion 4f to 45 ° to 15 ° with respect to the main rake face 4c, it is possible to prevent the outer peripheral blade 4a from sliding diagonally forward. The front cutting angle α of the rough cutting tip 4 is optimally 10 ° to 45 °, and the outer peripheral cutting angle γ is optimally 5 ° to 15 °.
[0022]
Next, a mirror finishing device for an end face of a resin material will be described with reference to FIGS.
The mirror finishing device continuously transports a resin work W along a processing line L by a work transfer device 20 and includes two mirror finishing cutters 10 arranged at predetermined positions on the processing line L, respectively. The rough cutting and the mirror finishing are simultaneously performed on the two end surfaces of the workpiece W at different angles by the upstream cutting portion 31A and the downstream cutting portion 31B.
[0023]
That is, a flat top conveyor (receiving conveyor) 23 is arranged along a processing line L of a processing table 22 installed via a bed 21, and a pressing belt conveyor ( A work conveyor 20 is configured with a holding conveyor 24 arranged therein, and the work W can be continuously transferred by the work conveyor 20.
[0024]
The flat top conveyor 23 includes a pair of sprockets 23a and 23b arranged on the upstream and downstream sides along the processing line L, a transport chain (endless rotating body for receiving) 23d wound between the sprockets 23a and 23b, It comprises an electric motor 23c for receiving and transporting the sprocket 23b on the downstream side to rotate and a plurality of flat blocks (with double-row chevron grooves) 23e attached to the links of these transport chains 23d. A plurality of grooves are formed in the receiving surface of the flat block 23e along the transport direction, and an elastic material for preventing slippage is attached to an arbitrary groove so as to prevent the work W from slipping.
[0025]
On the other hand, on a post member 25 erected on the bed 21, a conveyor frame 26 is supported so as to be able to move up and down along a processing line L above the processing table 22, and is moved up and down by a screw shaft type feed elevating mechanism 28 to adjust the vertical position. It is configured to be possible. The pressing belt conveyor 24 is installed on the conveyor frame 26 so as to face the flat top conveyor 23 with an upstream portion for loading the work in between.
[0026]
In the pressing belt conveyor 24, an endless elastic belt (endless rotating body for holding) 24c is wound around large-diameter reversing rollers 24a and 24b provided at the upstream end and the downstream end of the conveyor frame 26, and the downstream side. The pressing and conveying electric motor 24d is connected to the reversing roller 24b. The urging means 27 for urging the elastic belt 24c downward and holding the work W between itself and the flat block 23e includes a plurality of pressers arranged at regular intervals on the outward path of the elastic belt 24c of the reversing rollers 24a and 24b. And a biasing coil spring (not shown) interposed on a vertical shaft that supports the biasing guide roller 27a.
[0027]
The elastic belt 24c of the pressing belt conveyor 24 is formed in a T-shaped cross section having a convex ridge on its inner surface, and is fitted into guide grooves formed in the reversing rollers 24a, 24b and the pressing guide roller 27a, respectively, to thereby work the workpiece. The configuration is such that displacement of the W in the width direction can be prevented, and the work W can be firmly held without being damaged by a large number of protrusions (not shown) formed on the surface.
[0028]
Cutting portions 31A and 31B are provided on the upstream side and the downstream side of the post member 25, respectively, and the screw shaft type lifting / lowering mechanisms 32A and 32B capable of adjusting the height position manually are provided on both cutting portions 31A and 31B. Via a screw shaft type retracting mechanism 35A, 35B which can be manually moved to and from the processing line L side and a worm gear type rotating mechanism 33A, 33B which can manually adjust the angle of the rotation axis of the mirror finishing cutter 10. The cutting electric motors 34A and 34B are supported respectively, and the mirror finishing cutters 10 and 10 are mounted on the output shafts of the cutting electric motors 34A and 34B.
[0029]
Next, the operation of the mirror finishing device will be described.
First, the cutting edge of the finishing tip 7 of the mirror-finish cutter 10 is adjusted at both cutting portions 31A and 31B. In this adjustment, a reference plate is applied to the front side of the rough cutting tip 4 so that the cutting edge of the finishing tip 7 is adjusted with a dial gauge so that the finishing cutting amount with respect to the cutting edge of the rough cutting tip 4 becomes 0.01 to 0.05 mm. And set the blade edge to protrude. The screw shaft elevating mechanisms 32A, 32B, the screw shaft type retracting mechanisms 35A, 35B, and the worm gear type rotating mechanisms 33A, 33B make the rotation axis O substantially perpendicular to the end surface of the workpiece W to be mirror-finished. Then, the position of the mirror finishing cutter 10 is set. The amount of cutting by the rough cutting tip 4 at this time is 0.3 to 3.0 mm. Then, the height of the pressing belt conveyor 24 is baked by the screw shaft type feed elevating mechanism 28 in accordance with the thickness of the work W.
[0030]
When the flat top conveyor 23 and the pressing belt conveyor 24 are driven synchronously and the plate-shaped work W is sequentially carried into the upstream flat top conveyor 23, the work W is attached while being held at a fixed position. It is firmly held between the flat block 23e and the elastic belt 24c by the means 27, and is conveyed along the processing line L at a predetermined processing speed.
[0031]
Then, first, rough cutting is performed by the roughing chip 4 in a cutting amount of 0.3 to 3.0 mm, and then, cutting is performed in a cutting amount of 0.01 to 0.05 mm by the finishing chip 4 to be mirror-finished. .
[0032]
By the way, as shown in FIG. 9, when the cutting edge of the rough cutting tip 4 that moves in the circumferential direction at the time of cutting passes through the lower side Wb of the work W, the lower side Wb may be chipped. The chipping of the lower side portion Wb is caused by the fact that when the cutting edge passes through the lower side portion Wb, the tangential cutting force F for pressing the resin is separated into a component force Fa parallel to the lower side portion Wb and a component force Fb perpendicular to the lower side portion. However, it has been found from experiments by the inventor that when the component force Fb perpendicular to the lower side Wb is large, the resin is extruded with a large pressing force in the vicinity of the lower side Wb to cause chipping in the lower side Wb. Therefore, in this embodiment, the mirror finishing cutter 10 is positioned at a position where the upper side Wu of the work W approaches the top of the mirror finishing cutter 10, and when the cutting edge passes through the lower side, the lower side of the work W is reduced. The component force Fb perpendicular to Wb is set to be as small as possible. Thereby, chipping that occurs in the lower side portion Wb of the work W can be prevented beforehand.
[0033]
The finishing tip 7 is adjusted according to the finishing condition of the end face of the work W. That is, as shown in FIG. 10A, when an arc-shaped knife mark is formed from the upper side to the lower side, the side inclination adjusting screws 9e, 9e are adjusted to make the finishing bit 8 The tip is slightly inclined outward along the rotation axis O. As shown in FIGS. 10B and 10C, when a vertical knife mark or a vertical knife mark and an arc-shaped knife mark appear at the same time, the side inclination adjusting screws 9e, 9e are adjusted for finishing. The tip of the cutting tool 8 is slightly inclined inward along the rotation axis O. Further, as shown in FIGS. 10 (d) and 10 (e), when the knife mark is formed in a semicircular shape or a crescent shape, the tip of the finishing bit 8 is attached to the rotation axis O by the side inclination adjusting screws 9e, 9e. It is sufficient to incline only a small amount to the outside along.
[0034]
According to the above embodiment, in the rough cutting tip 4 of the mirror-finish cutter 10, since the chamfered portion 4 f having a width of 0.1 to 0.2 mm is formed on the outer peripheral blade 4 a, the resin is compressed and deformed during cutting. When the cutting edge reaches a certain point, the cutting edge slides along the surface that faces diagonally forward, and this can prevent shear-type cutting in which arc-shaped knife marks are generated by repetition of this, and tear-type cutting in which the cutting part generates heat due to frictional resistance Can be prevented, and the finishing tip 7 enables a good mirror finish without knife marks.
[0035]
Further, the work W can be reliably and continuously conveyed while the work W is sandwiched between the flat top conveyor 23 and the pressure belt conveyor 24 and firmly held by the urging means 27. Processing time can be greatly reduced.
[0036]
Further, the angle of the cutting edge of the rough cutting tip 4 and the finishing tip 7 passing through the lower side portion Wb of the work W is set to an acute angle, so that the cutting component force Fb perpendicular to the lower side portion Wb is reduced. And the position of the processing line of the workpiece W, the chipping that occurs when the cutting edge passes through the lower side portion Wb can be prevented beforehand, and a good mirror finish of the end surface can be achieved.
[0037]
【The invention's effect】
As described above, according to the first aspect of the present invention, by forming a corner portion of 0.1 to 0.2 mm on the outer peripheral edge of the rough cutting tip, the resin is compressed during the rough cutting and the rough cutting tip is formed. The edge of the blade slides along the surface facing diagonally forward and deforms, the edge returns to its original shape at the limit of deformation, and it is possible to prevent shearing cutting that produces arcuate knife marks by repeating this, and friction It is possible to prevent split-type cutting in which the cut portion generates heat due to resistance, and it is possible to perform excellent mirror finishing without knife marks in the subsequent finishing cutting using the finishing tip. In addition, since the end face can be rough-cut with a plurality of roughing inserts and the end face can be mirror-finished at a high speed with the finishing tip, the conventional mirror surface that required rough cutting, finish cutting, and buffing Compared with the finishing process, the number of processing steps can be reduced by half, and the processing speed can be doubled to reduce the processing time by a fraction.
[0038]
According to the second aspect of the present invention, the work is reliably transported continuously while the work is sandwiched between the conveyor and the holding conveyor and firmly held by the urging means, and the roughing and the mirror finishing are accurately performed by the mirror finishing cutter. Can do well. Further, compared with the conventional method in which the work is transported by reciprocating the clamp device, a step of returning the clamp device is not required, and the work can be continuously transported efficiently and the processing time can be greatly reduced.
[0039]
According to the third aspect of the invention, since the cutting component force perpendicular to the lower side portion can be reduced, chipping that occurs when the cutting edge passes through the lower side portion can be prevented beforehand, and favorable end face finishing can be performed. Become.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of a mirror finishing cutter according to the present invention.
FIG. 2 is a perspective view of the mirror finishing cutter.
FIG. 3 is a side view of the mirror finishing cutter.
4A and 4B show a finishing bit of the mirror finishing cutter, wherein FIG. 4A is a front view and FIG. 4B is a side view.
5A and 5B show a rough cutting bit of the cutter for mirror finishing, wherein FIG. 5A is a perspective view, FIG. 5B is a side view, FIG. 5C is a plan view, and FIG.
FIG. 6 is a front view showing an embodiment of a mirror finishing device according to the present invention.
FIG. 7 is a plan view showing the mirror finishing device.
FIG. 8 is a rear view showing the mirror finishing device.
FIG. 9 is an enlarged front view showing a cutting state of a mirror finishing cutter by the mirror finishing device.
FIGS. 10 (a) to (e) are explanatory views showing states of a cutting surface by the mirror finishing device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Boss main body 2 Cutter face plate 3 Tip pocket 4 Roughing tip 4a Outer edge 4b Side edge 4c Main rake face 4d Outer flank flank 4e Side flank 4f Chamfered portion 5 Notch 6 Mounting groove 7 Finishing tip 7a Horizontal cutting edge 7b Front cutting edge 8 Finishing bit 9 Posture adjusting mechanism 10 Mirror finishing cutter 11 Balance weight 20 Work transfer device L Processing line 21 Bed 22 Processing table 23 Flat top conveyor 23d Transport chain 23e Flat block 24 Pressing belt conveyor 24c Elastic belt 25 Post member 26 Conveyor frame 27 Biasing means 27a Pressing guide roller 28 Screw type feed elevating mechanism 31A, 31B Cutting part 32A, 32B Screw axis type elevating mechanism 33A, 33B Worm gear type rotating mechanism 35A, 35B Screw axis type retraction mechanism 34A , 34 B Electric motor for cutting

Claims (3)

Rough cutting tips made of diamond arranged at regular intervals on the outer peripheral portion of the cutter body of the face mill, a plurality of notches formed at symmetrical positions between the preceding blades, and at least one of the notches And a diamond finishing tip arranged in
The cutting edge of the finishing insert, on the inner peripheral side than the cutting edge of the rough cutting tip, and projecting by the finishing cutting amount to the axial center outside from the cutting edge of the rough cutting tip corresponding to the finishing cut amount,
An outer peripheral edge formed between a main rake face and an outer peripheral flank of the chip for rough cutting, a flat chamfer having a width of 0.1 to 0.2 mm is formed on a resin material end face. Mirror finishing cutter. A cutter for mirror finishing of a resin material according to claim 1, which is rotationally driven by a processing rotary drive device at a predetermined position of a processing line provided along the processing table,
A receiving conveyor having a receiving endless rotating body for supporting a work from below on a processing table along the processing line, and a presser having a pressing endless rotating body for pressing the work from above facing the upper part of the receiving conveyor; A resin, comprising: a conveyor and a biasing means for receiving the endless rotating body for holding and biasing the conveyor side to hold the plastic work, and providing a work transfer device capable of continuously transferring the work. Mirror finishing device for material end surfaces. The rough cutting tip and the finishing tip of the mirror finishing cutter are arranged so as to cut from the upper side to the lower side with respect to the end face of the work conveyed along the processing line by the work conveying apparatus,
The mirror finishing tool and the processing line position are set so that the cutting angle at which the rough cutting tip passes through the lower side portion is an acute angle, and the cutting component force perpendicular to the lower side portion of the cutting force is reduced. 2. The mirror finishing apparatus for resin end faces according to 2.

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