JP2019123071A - Cutter and manufacturing method thereof - Google Patents

Abstract

To provide a cutter and a manufacturing method thereof hardly causing a flaw on a surface of a processing work.SOLUTION: A cutter is used for cutting work of a work causing generation of chips, and comprises a block-shaped cutter body defining a tank-shaped receiving seat slot on a side surface on the front side in the longitudinal direction and a cutter block part having a cutter top surface forming the front end cutter edge for cutting the work on the peripheral edge on the most front side in the longitudinal direction, and the cutter body is formed with a drawing checking block front part drawing so as to be adjacent to the cutter top surface, and when the cutter block part is fitted in a receiving seat slot, the cutter top surface projects further to the outside more than the drawing checking block front part.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a cutter and a method of manufacturing the same, and more particularly to a cutter which is less likely to damage the surface of a workpiece to be processed and a method of manufacturing the same.

  The method of using the conventional cutter will be described with reference to FIGS. 1 and 2. Here, FIG. 1 is a plan view for explaining how to use the conventional cutter, and FIG. 2 is an enlarged view of an essential part for explaining how the conventional cutter cuts the work.

  As shown in FIG. 1 and FIG. 2, the conventional cutter cuts the workpiece 6 by bringing it into contact with the workpiece 6 rotating about the rotation axis R. At this time, chips 61 are generated along with the cutting.

  Moreover, as shown in FIG. 1, the conventional cutter has a cutter upper surface 11 formed in a substantially triangular shape in plan view and one side (a right side of FIG. 1 of the cutter upper surface 11). It is formed on the side, and one end is connected to the adjacent side (the side on the left side, hereinafter referred to as the second side), and in the vertical direction (FIG. 1 is a plan view, not shown because of angular relationship) And a cutter front end face 12 whose width in the front-rear direction B between the second side gradually extends as it extends in the feed direction T, and the cutter front end face 12 and the second side And a cutter side surface 13 (lower side in FIG. 1, hereinafter referred to as a third side) connecting the

  Here, a chip groove 111 and a cut portion 112 are formed on the cutter upper surface 11. The chip groove 111 is defined so as to extend in the front-rear direction B from the first side (the cutter front end surface 12) from the third side. That is, as shown in FIG. 1, it is stretched so as to be parallel to the third side.

  Further, as shown in FIG. 2, the cut portion 112 is connected to the cutter side surface 13. Furthermore, as shown in FIG. 2, a guide groove 14 is formed on the lower side of the chip groove 111 adjacent to the chip groove 111 so as to be recessed.

  At the time of processing, as shown in FIG. 1, the cutter is made to approach the work 6 in the front-rear direction B, and the work 6 and the cutter are relatively moved along the feed direction T orthogonal to the front-back direction B using the cut portion 112 The outer circumferential surface of the work 6 is cut by moving to the direction.

  Further, as shown in FIG. 1, the chips 61 generated from the work 6 after being cut extend in the opposite direction to the feed direction T. That is, as shown in FIG. 2, after being cut, the chips 61 are folded back along the recessed guide groove 14 to change the direction.

  The chip groove 111 is not necessarily required, and as shown in Patent Document 1 below, there is also a cutter in which the chip groove 111 is not formed.

Taiwan Utility Model Registration No. M378058 Specification

  However, the chip grooves 111 can guide the chips 61 only in the direction opposite to the feeding direction T. Further, since it is not easy to cut the chip 61, as shown in FIG. 2, a thin and long chip 61 is generated, and the tip of the chip 61 approaches the workpiece 6 as the chip 61 becomes longer. As a result, the surface of the work 6 may be damaged.

  Then, an object of this invention is to provide the cutter which does not scratch the surface of the workpiece | work to be processed easily, and its manufacturing method.

  In view of such problems, the present invention has the following configuration.

  The cutter according to the present invention is a cutter used for cutting of a work accompanied by generation of chips, which is a block-shaped cutter main body having a bath-like receiving slot defined on the front side in the front-rear direction; And a cutter block portion having a cutter top surface having a front end cutter edge formed on the foremost peripheral edge in the front-rear direction and fitted in the seat slot, and the cutter body includes the cutter top surface An adjacent stretch inhibiting block front is formed, and the cutter top surface protrudes further outward than the stretch inhibiting block front.

  Further, the method of manufacturing a cutter according to the present invention is a method of manufacturing a cutter used for cutting of a work accompanied by generation of chips, and the side surface on the front side in the front and rear direction of the block-shaped cutter body is The steps of defining a bath-like receiving slot, applying a first sandblast to the cutter body, forming a cutter edge for cutting the work on a cutter block, and cutting the cutter block Fitting and welding the cutter block portion to the receiving seat slot such that the cutter edge protrudes further outward than the receiving seat slot; a second for the cutter body and the cutter block portion Applying sand blasting.

  The cutter according to the present invention comprises a block-shaped cutter body in which a bath-like receiving slot is defined on the front side in the front-rear direction, and a cutter edge projecting from the receiving slot in the front-back direction to cut a workpiece Since it has a cutter block portion fitted into the receiving seat slot, it is difficult to scratch the surface of the workpiece to be processed.

It is a top view for demonstrating the usage method of the conventional cutter. It is a principal part enlarged view explaining a mode that the conventional cutter cut | disconnects a workpiece | work. It is a perspective view explaining a 1st embodiment of a cutter of the present invention. It is a disassembled perspective view explaining the 1st Embodiment of this invention. It is a top view explaining the 1st embodiment of the present invention, and is a figure explaining signs that a cutter cuts a work. It is a top view explaining the cutter block part of the present invention. In the first embodiment of the present invention, it is a partial cross-sectional view showing a state in which the work is cut. It is a flowchart for demonstrating the manufacturing method of the cutter of this invention. It is a front view of the present invention, and is a figure which assembled a base part and an extension prevention block of a cutter body of the present invention. It is a front view which shows the state by which the receiving seat slot was defined by the base part. It is a front view explaining the state where the cutter block part was inserted in the seat slot. It is a top view explaining the state where the cutter block part was inserted in the seat slot. It is a top view which shows 2nd Embodiment of the cutter of this invention. It is a top view explaining the 2nd embodiment of the present invention, and is a figure explaining signs that a cutter cuts a work.

  The cutter of the present invention will be described with reference to FIGS. 3, 4, 5, 6 and 9. Here, FIG. 3 is a perspective view for explaining the first embodiment of the cutter of the present invention. Further, FIG. 4 is an exploded perspective view for explaining the first embodiment of the present invention, and FIG. 5 is a plan view for explaining the first embodiment of the present invention, and an explanation of a cutter cutting a work is described. It is a figure to do. Moreover, FIG. 6 is a top view explaining the cutter block part of this invention. FIG. 9 is a front view of the present invention, in which the base portion of the cutter body of the present invention and the extension blocking block are assembled.

  The cutter according to the present embodiment is used for a work 5 which rotates around a rotation axis L shown in FIG. When the work 5 is cut, chips 51 are produced. Moreover, the cutter in this embodiment is equipped with the block-shaped cutter main body 2 and the cutter block part 3, as shown to FIG. 3, FIG.

  The cutter body 2 includes a base portion 21, an extension blocking block 22 provided on the base portion 21, and a circular hole 23 penetrating the base portion 21 and the extension blocking block 22 in the vertical direction Z. The circular hole 23 is formed substantially at the center in the front-rear direction X and the left-right direction Y orthogonal to the vertical direction Z. Moreover, as shown in FIG. 5, the cutter main body 2 is formed in a substantially rhombic shape as a whole in a plan view, and is formed symmetrically in the front-rear direction and the left-right direction.

  Further, the base portion 21 includes a front end surface 211, a receiving slot 212, a first base side surface 213 (FIGS. 3 and 5), a second base side 214 (FIG. 5), and a receiving bottom surface 215 (FIG. 4), the receiving seat vertical surface 216 (FIG. 4), the rear end surface 217 (FIG. 6), and the rear side surface 218 (FIG. 3, FIG. 4, FIG. 9).

  Here, the front end surface 211 is formed on the front side of the base portion 21 in the front-rear direction X, as shown in FIG. Further, as shown in FIG. 3, the receiving slot 212 is recessed in the front end surface 211 and is adjacent to the extension blocking block 22 in the front-rear direction X.

  As shown in FIGS. 3 and 5, the first base side surface 213 and the second base side surface 214 are formed on both sides in the left-right direction Y, respectively, and extend from the front end face 211 to the rear side in the front-rear direction X In addition, the distance between the first base side surface 213 and the second base side surface 214 gradually increases as the circular hole 23 is approached.

  The receiving seat bottom surface 215 is formed at the bottom of the receiving seat slot 212 (the surface formed at the bottom in the vertical direction Z) as shown in FIG.

  The receptacle vertical surface 216 is formed at the deepest portion (that is, the rear side) in the longitudinal direction X of the receptacle slot 212 as shown in FIG. 4 and extends in the height direction Z, and one end is the bottom of the receptacle. It is connected to 215. A receiving slot 212 is formed by the receiving sheet vertical surface 216, the receiving sheet bottom surface 215, and the bottom surface of the extension blocking block front part 221 (see FIG. 4) described later of the extension blocking block 22. As a result, as shown in FIG. 4, the receiving slot 212 penetrates from the first base side surface 213 to the second base side surface 214 in the left-right direction Y.

  As shown in FIG. 3, the rear end surface 217 is provided on the opposite side (rear side) in the front-rear direction X with respect to the front end surface 211. One end of the pair of rear side surfaces 218 is connected to the rear end surface 217 as shown in FIGS. 3 and 9.

  In addition, the pair of rear side surfaces 218 are formed such that the distance between them in the left-right direction Y gradually widens as they extend toward the front end surface 211, and the other ends thereof are each described above as shown in FIG. It is connected to one base side 213 or the second base side 214.

  Next, the extension blocking block 22 will be described with reference to FIGS. 5 and 7. Here, FIG. 7 is a partial cross-sectional view at the time of cutting a work in the first embodiment of the present invention. Moreover, since FIG. 7 inclines the angle which looks at the cutter main body 2 90 degree from FIG. 5, the side (1st base side 213, the back side 218) of the cutter main body 2 can be confirmed. Further, in the present application, a viewpoint from which the side surface of the cutter main body 2 can be confirmed from the angle shown in FIG. 7 is referred to as a side view.

  The stretch blocking block 22 shown in FIG. 5 comprises a stretch blocking block front portion 221 and a pair of stretch blocking block sides 222. The extension blocking block front part 221 extends forward in the front-rear direction X so as to define a part of the above-mentioned receiving slot 212. However, it is preferable that the length by which the extension blocking block front part 221 extends to the front side in the front-rear direction X does not exceed the front end surface 211 of the base portion 21 as shown in FIG. 7.

  Moreover, as shown in FIG. 5 and FIG. 7, the chips 51 are in contact with the extension blocking block front portion 221. Further, as shown in FIG. 5, the distance between the pair of extension blocking block side portions 222 gradually increases as it extends from the extension blocking block front part 221 to the rear side in the front-rear direction X.

  Further, as shown in FIG. 7, the thickness of the extension blocking block front portion 221 is thin at the foremost side in the front-rear direction X (length in the vertical direction Z), and gradually increases as it extends backward. After passing through the contact surface 34 described later in the direction X, the thickness becomes constant. That is, the bottom surface of the extension blocking block front portion 221 facing the cutter block portion 3 extends in parallel with the cutter block portion 3 and, as shown in FIG. It is formed in an arc shape.

  In addition, although the extension prevention block front part 221 is slightly curved in FIG. 7, it may be a slope.

  Further, in the present embodiment, the cutter body 2 can be fixed to the cutter hand portion (not shown) by screwing a screw (not shown) into the circular hole 23, but the present invention is limited thereto. Alternatively, the cutter body 2 may be fixed to the cutter hand portion by another method.

  Next, the cutter block portion 3 will be described with reference to FIGS. 4, 5, 6 and 7. As shown in FIG. 4, the cutter block portion 3 can be fitted into the receiving slot 212. Further, the cutter block portion 3 includes a cutter top surface 31, a cutter bottom surface 32, a cutter end surface 33, an abutment surface 34, a first cutter side surface 35, and a second cutter side surface 36.

  Here, as shown in FIG. 4, the cutter top surface 31 is formed on the upper side in the vertical direction Z. The cutter bottom surface 32 is formed on the lower side in the vertical direction Z so as to face the cutter top surface 31. The upper and lower sides of the cutter end surface 33 are connected to the cutter top surface 31 and the cutter bottom surface 32, respectively, and project in a curve toward the front side in the front-rear direction X. Further, as shown in FIG. 3, when the cutter end face 33 of the cutter block 3 is fitted into the receiving slot 212, a part thereof protrudes to the front side relative to the extension blocking block front part 221.

  As shown in FIG. 4, the abutting surface 34 abuts on the receiving sheet vertical surface 216 of the base portion 21. The upper and lower sides of the first cutter side surface 35 are connected to the cutter top surface 31 and the cutter bottom surface 32, respectively, and the rear side in the front-rear direction X is connected to the contact surface 34 and fitted in the receiving slot 212 Adjacent to the first base side surface 213 (FIG. 3).

  On the other hand, as shown in FIG. 4, the upper and lower sides of the second cutter side surface 36 are respectively connected to the cutter top surface 31 and the cutter bottom surface 32, and the rear side in the front-rear direction X is connected to the contact surface 34, Adjacent to the second base side 214 (FIG. 5) when fitted into the receptacle slot 212. Further, as is clear from FIG. 5, the first cutter side surface 35 is formed longer in the front-rear direction X than the second cutter side surface 36, and is not symmetrical in the plan view.

  The cutter top surface 31 comprises a front end cutter edge 311, a first cutter edge 312 and a second cutter edge 313. As shown in FIG. 4, the front end cutter edge 311 is connected to the cutter end face 33 and is used when cutting the work 5 shown in FIG. 5. Also, as shown in FIG. 4, the first cutter edge 312 is connected to the first cutter side surface 35 and is used when cutting the work 5. The second cutter edge 313 is connected to the second cutter side surface 36 and is used when cutting the work 5.

  Here, as shown in FIG. 7, when the work 5 is rotated in the direction of the arrow while being in contact with the front end cutter edge 311, the work 5 is cut at the front end cutter edge 311. On the other hand, as shown in FIG. 5, the first cutter edge 312 and the second cutter edge 313 abut on the workpiece 5 when the cutter body 2 is moved in the left-right direction Y with respect to the workpiece 5.

  Further, as shown in FIG. 3, the first cutter edge 312 and the second cutter edge 313 are spaced apart from the extension blocking block side portion 222 in the left-right direction Y, respectively. That is, when cutting the work 5 with the first cutter edge 312 or the second cutter edge 313, the extension blocking block side portion 222 is recessed behind the first cutter edge 312 or the second cutter edge 313 (see FIG. It is inside in the left-right direction Y).

  For this reason, if the positional relationship between the work 5 and the cutter main body 2 is adjusted to an appropriate position in the front-rear direction X, the extension blocking block side portion 222 does not directly touch the work 5 and cutting of the cut work 5 Contact with waste 51

  In the present embodiment, as described above, the length of the first cutter edge 312 is longer than the second cutter edge 313 (FIG. 4, FIG. 5, FIG. 6), and the receiving sheet vertical surface 216 is the first cutter. An acute angle (θ 1, FIG. 5) is formed with the side surface 35. On the other hand, the angle (θ2) formed between the receiving sheet vertical surface 216 and the second cutter side surface 36 is wider than the acute angle θ1 (FIG. 4, FIG. 5, FIG. 6). That is, the first cutter edge 312 and the second cutter edge 313 have a curved angle symmetrical in plan view, and the first cutter edge 312 is longer than the second cutter edge 313). Be done.

  Next, a method of manufacturing a cutter according to the present invention will be described with reference to FIGS. Here, FIG. 8 is a flowchart for demonstrating the manufacturing method of the cutter of this invention. The method of manufacturing the cutter includes the following steps S41 to S47. Further, as described above, FIG. 9 is a front view of the present invention, in which the base portion of the cutter body of the present invention and the extension blocking block are assembled. Moreover, FIG. 10 is a front view which shows the state by which the receiving seat slot was comprised by the base part. Moreover, FIG. 11 is a front view explaining the state which inserted the cutter block part in the seat slot. Furthermore, FIG. 12 is a top view explaining the state which inserted the cutter block part in the receiving slot.

  In step S41, the cutter body 2 is processed into the base portion 21 and the extension blocking block 22. In this step S41, the receiving slot 212 is not processed yet.

  As shown in FIG. 8, FIG. 9, and FIG. 10, a notch is formed in the base portion 21 in step S42. That is, the receiving slot 212 is formed by cutting or scraping off a part of the base portion 21 by, for example, a wire cutting method.

  In step S43, the first sandblasting is performed on the cutter body 2.

  In step S44, as shown in FIGS. 8, 10, and 11, the cutter block portion 3 is processed. That is, the front end cutter edge 311, the first cutter edge 312, and the second cutter edge 313 are formed on the cutter top surface 31.

  In step S45, as shown in FIGS. 10 and 11, the cutter block 3 is fitted into the receiving slot 212. Then, as shown in FIG. 11, the cutter end face 33 is protruded to the front side in the front-rear direction X, and the abutting surface 34 of the cutter block 3 is abutted against the receiving seat vertical surface 216, Attach. In addition, an attachment method may use an adhesive agent and may weld, and the method is not ask | required.

  In step S46, as shown in FIGS. 8, 9 and 11, the second sandblasting is performed on the cutter body 2 and the cutter block 3. In the present embodiment, it is preferable that the first sand blast be relatively rough and the second sand blast be relatively finely ground.

  In step S47, as shown in FIG. 6, FIG. 8, and FIG. 12, the cutter block 3 is polished. Then, as shown in FIG. 6, the first cutter side surface 35 and the second cutter side surface 36 are positioned so as to be flush with the first base side surface 213 and the second base side surface 214, respectively. Make a match.

  At the time of use, as shown in FIG. 4, FIG. 5 and FIG. 7, the cylindrical work 5 is processed by pressing the cutter against the work 5, and the dimensions of the work 5 are adjusted. Here, although several modes can be considered as a method of processing, since all are prior art, they will not be described again here.

  The following is an example of the processing method. First, the front end cutter edge 311 is brought into contact with the work 5 by bringing the cutter body 2 and the cutter block 3 close to the work 5 along the longitudinal direction X as shown in FIG. The workpiece is cut using the front end cutter edge 311 and the first cutter edge 312 by moving the cutter body 2 and the cutter block 3 in parallel along the left-right direction Y as shown in FIG.

  In addition, when cutting is continuously performed on the work 5, as shown in FIGS. 5 and 7, the chips 51 are directed in the backward direction opposite to the forward direction, which is the feed direction of the cutter body 2 and the cutter block portion 3. By gradually contacting and contacting the surface formed on the upper side of the extension blocking block front part 221 shown in FIGS. 5 and 7 or the upper surface of the adjacent extension blocking block side part 222, the structure shown in FIG. As shown, it is bent in the direction opposite to the rotation direction of the work 5 indicated by the arrow, and is torn apart.

  Thus, the manufacturing method of the present embodiment can manufacture a cutter, and the chip 51 is in contact with the extension blocking block front portion 221 or the adjacent extension blocking block side portion 222 as compared with the conventional cutter. Afterward, as shown in FIG. 7, the chip 51 is easily torn since the direction is changed so as to bend.

  Therefore, the chips do not extend too long as in the prior art, and they are torn in a short stage, so that the chips 51 do not extend to such a length that they come in contact with the work 5 and the work 5 is damaged. Hateful.

  Further, as shown in FIG. 6, since the receiving sheet vertical surface 216 and the first cutter side surface 35 form an acute angle, when the cutter body 2 and the cutter block 3 cut using the first cutter edge 312, Since the receiving sheet vertical surface 216 is pressed in the feed direction, a strength that can withstand cutting between the cutter block 3 and the cutter body 2 is obtained.

  Subsequently, a second embodiment of the present invention will be described with reference to FIGS. 13 and 14. Here, FIG. 13 is a plan view showing a second embodiment of the cutter according to the present invention. FIG. 14 is a plan view for explaining the second embodiment of the present invention, and is a view for explaining how the cutter cuts the work.

  Since the second embodiment has many configurations in common with the first embodiment, the same components are assigned the same reference numerals and descriptions thereof will be omitted. In the second embodiment, the lengths of the first cutter edge 312 and the second cutter edge 313 are the same. Further, the angle formed by the receiving sheet vertical surface 216 and the first cutter side surface 35 is the same as the angle formed by the receiving sheet vertical surface 216 and the second cutter side surface 36.

  The normal to the receiving sheet vertical surface 216 is parallel to the front-rear direction X. For this reason, when the cutter body 2 and the cutter block 3 are pushed in the front-rear direction X, they have excellent strength. In particular, the second embodiment can be used to machine ring-shaped grooves in the surface of a cylindrical workpiece 5.

  For this reason, the second embodiment can achieve the same purpose as the first embodiment and can obtain the same operation and effect.

  As described above, according to the cutter of the present invention and the method for manufacturing the same, the extension blocking block front portion 221 spaced apart from the front end cutter edge 311 and the extension blocking block side portion connected with the extension blocking block front portion 221 At 222, the chips 51 can be prevented from stretching horizontally and can be torn by bending.

  For this reason, it is possible to prevent the length of the chip 51 from becoming too long, and the work 5 is not easily damaged, and the object of the present invention can be achieved.

  The above description is merely an example of the present invention, and not intended to limit the scope of the claims. In addition, only the simple additions and changes to the contents of the claims and the specification of the present invention also belong to the technical scope of the invention described in the claims.

DESCRIPTION OF SYMBOLS 2 cutter main body 21 base part 211 front end face 212 reception slot 213 first base side 214 second base side 215 reception seat bottom 216 reception seat vertical surface 217 rear end face 218 back side 22 extension blocking block 221 extension blocking block front 222 Extension blocking block side portion 23 circular hole 3 cutter block portion 31 cutter top surface 311 front end cutter edge 312 first cutter edge 313 second cutter edge 32 cutter bottom surface 33 cutter end surface 34 abutment end surface 35 first cutter side surface 36 Second cutter side surface S41 to S47 Step 5 Workpiece 51 Chips X Longitudinal direction Y Horizontal direction Z Vertical direction L Axis

Claims (9)

A cutter used for cutting of workpieces with chip generation,
A block-like cutter body having a trough-like receiving slot defined on the front side in the front-rear direction;
A cutter block portion having a cutter top surface having a front end cutter edge formed on the foremost peripheral edge in the front-rear direction and fitted in the receiving seat slot;
The cutter main body is formed with an extension blocking block front portion extending to be adjacent to the cutter top surface, and the cutter top surface protrudes further outward than the front surface of the extension blocking block. The periphery of the cutter top surface is
A first cutter edge and a second end extending in such a manner as to be spaced apart from each other in the left-right direction orthogonal to the front-rear direction as one end is connected to the front end cutter edge and the other end side is away from the front end cutter edge With cutter edge,
In addition to the front end cutter edge, the first cutter edge and the second cutter edge also project outside the receiving slot when the cutter block portion is fitted into the receiving slot. The cutter according to claim 1. The cutter block portion is
A cutter bottom surface opposite to the cutter top surface in the vertical direction;
A cutter end face that connects the cutter top surface and the cutter bottom surface by projecting in a curve toward the front side in the front-rear direction and extending along the up-down direction;
By extending along the vertical direction on the rear side in the front-rear direction, the cutter end surface is connected to each other at both ends, and an abutment surface is provided to connect the cutter top surface and the cutter bottom surface.
The receptacle slot of the cutter body is:
A reception sheet vertical surface that contacts the contact surface and extends in the vertical direction;
A receiving seat bottom which abuts against the cutter bottom;
A cutter according to claim 2, characterized in that it is defined by the bottom of the front of the stretch blocking block. In the front portion of the extension blocking block, the bottom surface of the front portion of the extension blocking block facing the cutter block extends in parallel with the cutter top surface in a side view, and is relative to the bottom surface of the front portion of the extension blocking block The cutter according to claim 3, wherein the upper surface side is formed in a substantially 1⁄4 arc shape from the foremost side to the rear side in the front-rear direction. The cutter main body is formed in a substantially rhombic shape having a diagonal in the front-rear direction longer than a diagonal in the left-right direction and symmetrical in the front-rear direction and the left-right direction in plan view, and a hole penetrating in the up-down direction is formed The cutter according to claim 1, characterized in that: The first cutter edge and the second cutter edge protrude in a curve toward the front side in the front-rear direction and have a circular arc shape in plan view and are symmetrical, and of the first cutter edge The length is longer than the second cutter edge,
A cutter according to claim 4, characterized in that. The length of the first cutter edge is equal to the second cutter edge,
A cutter according to claim 4, characterized in that. A method of manufacturing a cutter used for cutting a workpiece accompanied by generation of chips, comprising:
Defining a bath-like receiving slot by a wire cutting method on the front side surface in the front-rear direction of the block-like cutter body;
Applying a first sand blast to the cutter body;
Forming a front end cutter edge for cutting the work on the cutter block portion;
Fitting and welding the cutter block portion into the receiving slot so that the front end cutter edge of the cutter block protrudes further outward than the receiving slot;
Applying a second sand blast to the cutter body and the cutter block portion;
A method of manufacturing a cutter, comprising: In the above step,
The cutter block portion is
The first end is connected to the front end cutter edge, and the other end side extends away from the front end cutter edge in the left-right direction orthogonal to the front-rear direction so as to have an arc shape as a whole. And the second cutter edge is further formed,
In the above step
When the cutter block portion is fitted into the receiving seat slot, the first cutter edge and the second cutter edge also project from the receiving slot in addition to the front end cutter edge. The manufacturing method of the cutter of Claim 8.

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