JP2010149230A - Cutting tool and method of polishing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutting edge replaceable cutting tool using a plurality of tips, which changes a rake angle of a tip in a short period of time, and polishes the tip in a short period of time without removing it from the cutting tool, and also to provide a method of polishing the cutting tool. <P>SOLUTION: A distal end of a cutter body 10 is provided with a plurality of spindles 30 individually corresponding to the plurality of tips CB; where each of the tips is mounted on a corresponding spindle, partly projects from the cutter body, and is rockable around the spindle. The cutting tool is further provided with a socket member 20 which is shaped to cover at least part of the cutter body and assumes a restriction form restricting a rocking range for each tip, thereby providing a structure simultaneously adjusting rake angles θS of the plurality of tips by changing the rocking ranges for the individual tips by adjusting the position of the socket member with respect to the cutter body. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a cutting tool for cutting a flat surface or a groove, and a polishing method for the cutting tool.

Conventionally, as a cutting tool, a so-called milling tool is generally used for high-efficiency removal of a flat surface, and a so-called side cutter is generally used for cutting a groove.
Cutting tools include a high-speed steel material with a main body and a cutting edge (see FIGS. 7A and 7B), and a cutting edge as disclosed in Patent Document 1 and Patent Document 2 described later. There is a tool having a replaceable configuration and a throwaway tip (hereinafter, the throwaway tip is referred to as a tip) using cemented carbide or cermet as the material of the cutting edge.
In the cutting process, a cutting tool for each rake angle having a cutting edge set to an appropriate rake angle for each cutting process is used according to the work material, machining efficiency, finishing accuracy, and the like.
If the rake angle can be changed, it is not necessary to prepare a cutting tool for each rake angle. However, in the case of a cutting tool with an integrated cutting edge (hereinafter referred to as a cutting edge integrated cutting tool), the rake angle of the cutting edge is determined. The rake angle cannot be changed. In addition, in a cutting tool in which a tip is used (hereinafter referred to as a cutting edge exchange type cutting tool), it can be replaced with a tip having a different rake angle, but the tip must be removed and replaced one by one. It takes a lot of work. For this reason, in general, a cutting tool for each rake angle is prepared, and the cutting process is performed by replacing the cutting tool with a desired rake angle. , Processing efficiency is reduced.
In addition, when the cutting edge is worn or chipped, the corresponding cutting edge is re-polished with the cutting edge-integrated cutting tool, and the corresponding tip is replaced with the cutting edge replacement type cutting tool.

Here, in the prior art described in Patent Document 1, in the cutting edge exchange type cutting tool, two pin holes are provided in the mounting portion of each chip, and the pin hole into which the lock pin is inserted is changed. A milling cutter is disclosed that can change the rake angle of the chip without replacing the tip.
Further, the prior art described in Patent Document 2 is a tool that can be re-polished without removing the tip from the cutting tool in a cutting edge exchange type cutting tool, and an operator puts a spacer between the tip and the tool body. Change the tip clearance angle to zero (and change the rake angle at the same time) so that the tip clearance surface is on the same plane. Disclosed is a blade-tip-exchange-type cutting tool that can regrind the flank face by rotating in the opposite direction.
JP 7-24623 A JP 2000-254813 A

In the prior art described in Patent Document 1, it is not necessary to remove and replace each of the chips in order to change the rake angle of each of the chips attached to the cutting edge exchange type cutting tool. Since the position of the lock pin of the chip has to be changed, it is very laborious and time consuming.
Further, in the prior art described in Patent Document 2, it is not necessary to remove each of the chips, but in order to change the clearance angle of each chip, an operator places a spacer between each chip and the tool body. Since it must be inserted, it takes a lot of work and time.
The present invention was devised in view of such a point, and in a cutting edge exchange type cutting tool using a plurality of tips, the rake angle of the tip can be changed in a shorter time. It is an object of the present invention to provide a cutting tool that can be polished in a shorter time without being removed from the tool, and a polishing method for the cutting tool.

As means for solving the above-mentioned problems, a first invention of the present invention is a cutting tool as described in claim 1.
The cutting tool according to claim 1, comprising: a cutter body rotatable around a cutter rotation axis; and a plurality of chips provided at tip portions of the cutter body in a direction of the cutter rotation axis. The tip of the cutter body is provided with a plurality of support shafts corresponding to each of the plurality of tips, and each of the tips is attached to the support shaft and is more than the cutter body. A part of the tip protrudes and can swing around the attached support shaft.
And a socket member that has a shape that covers at least a part of the cutter body and that can regulate the swing range of each of the chips, and adjusts the position of the socket member with respect to the cutter body. The rake angle of each of the chips can be adjusted simultaneously by changing the swing range of each of the chips.

Moreover, 2nd invention of this invention is a cutting tool as described in Claim 2.
The cutting tool according to claim 2 is the cutting tool according to claim 1, wherein each of the plurality of support shafts is provided on an outer peripheral surface of the cutter body in a direction perpendicular to the cutter rotation axis. In each of the plurality of tips, a part of the tip protrudes in the cutter rotation axis direction with respect to the cutter body, and a cutting edge is formed in the protruding portion.
The socket member has a shape that circulates around an outer peripheral surface of the cutter body, and the cutter body and the socket member include a positioning portion that positions a position of the socket member with respect to the cutter body, and the positioning portion The rake angle of the chip is set to an angle corresponding to the adjusted position by adjusting at least one of the position of the rotation angle of the socket member with respect to the cutter body or the position in the cutter rotation axis direction using Has a possible structure.

Moreover, the 3rd invention of this invention is a cutting tool as described in Claim 3.
The cutting tool according to claim 3 is the cutting tool according to claim 1 or 2, wherein the socket member is adjusted to a position relative to the cutter body to form a rake angle of the chip. Has a structure capable of matching with an orthogonal plane orthogonal to the cutter rotation axis.

The fourth invention of the present invention is a cutting tool polishing method as described in claim 4.
A cutting tool polishing method according to claim 4 is a cutting tool polishing method for polishing each of the chips using the cutting tool according to claim 3, wherein a polishing surface perpendicular to the cutter rotation axis is provided. And a polishing method for simultaneously polishing each of the rake faces that coincide with the orthogonal plane.

Moreover, the 5th invention of this invention is a cutting tool as described in Claim 5.
The cutting tool according to claim 5 is the cutting tool according to claim 1, wherein each of the plurality of support shafts has an end surface that is a surface orthogonal to the cutter rotation axis at a tip portion of the cutter body. Each of the plurality of chips is provided with a part of the chip protruding in the radial direction of the cutter body, and a cutting edge is formed in the protruding part.
The socket member has a shape that covers at least a part of an end surface of the cutter body, and the cutter body and the socket member include a positioning portion that positions the position of the socket member with respect to the cutter body, By adjusting the position of the rotation angle of the socket member with respect to the cutter body using a positioning part, the rake angle of the chip can be set to an angle corresponding to the adjusted position.

If the cutting tool of Claim 1 is used, the rocking | fluctuation range of each chip | tip can be changed and the rake angle of each chip | tip can be changed simultaneously by adjusting the position of the socket member with respect to a cutter body ( (See FIG. 1).
Thereby, the rake angle of the chip can be changed in a shorter time.

According to the second aspect of the present invention, the support shaft is provided in a direction orthogonal to the cutter rotation axis and on the outer peripheral surface of the cutter body, so that the tip can swing around the support shaft. Is provided. And the chip | tip is a milling type cutting tool from which one part protruded in the cutter rotating shaft direction.
Therefore, it is possible to realize a milling type cutting tool capable of simultaneously changing the rake angle of each chip (see FIG. 1).

  According to the cutting tool of claim 3, in the milling type cutting tool, the rake face of each chip can be made to coincide with the orthogonal face perpendicular to the cutter rotation axis, so that the rake face is polished. (See FIG. 2B).

  Further, according to the polishing method for a cutting tool according to claim 4, a plurality of chips are obtained by using a rake face of the chip that is made to coincide with an orthogonal surface orthogonal to the cutter rotation axis, using the polishing surface orthogonal to the cutter rotation axis. Since the rake face can be simultaneously polished (see FIG. 2B), it can be polished in a shorter time. Moreover, since it can grind | polish without removing a chip | tip, the positional accuracy of a blade edge | tip can be improved more.

Further, according to the cutting tool of the fifth aspect, the support shaft is provided in the direction of the cutter rotation axis and on the end surface of the cutter body, and the tip is provided so as to be swingable around the support shaft. Yes. And it is a side cutter type cutting tool from which the chip | tip protruded partially in the radial direction of the cutter body.
Accordingly, a side cutter type cutting tool capable of simultaneously changing the rake angle of each chip can be realized (see FIGS. 5A and 5B).

The best mode for carrying out the present invention will be described below with reference to the drawings. FIG. 1 shows an example of a side view in an embodiment of a cutting tool 1 of the present invention. Note that all of the cutting tools 1 described in the present embodiment are cutting edge exchange type cutting tools.
7A to 7C show an example of a conventional cutting tool 100 with an integrated cutting edge (in this case, a milling tool that cuts the plane of the workpiece W). FIG. 7A shows an example of a side view of the cutting tool 100 cutting the plane of the workpiece W, and FIG. 7B is a view seen from the A direction of FIG. FIG. 7C is an enlarged view of the cutting edge BR in FIG. The cutting tool 100 moves in the X axis direction while rotating around the cutter rotation axis CZ to cut the plane of the workpiece W. Note that the integrated cutting tool 100 cannot change the rake angle θS because the angle of the rake face MS of the cutting edge BR cannot be changed.

●● [First embodiment (FIGS. 1 to 4)]
Next, a milling type cutting tool 1 (blade cutting type cutting tool) that cuts a plane will be described with reference to FIGS. 1 to 4.
● [Example of milling die for cutting the plane and the shape of the tip is substantially square (FIGS. 1 to 3)]
The milling type cutting tool 1 in the case where the chip CB is substantially square will be described with reference to FIGS. Note that the chip CB has a substantially quadrangular shape, although the corner in the vicinity of the support shaft 30 is dropped into an arc shape. This arc shape is a shape for avoiding interference with the restriction shape (concave portion) of the socket member 20 that restricts the swing range of the chip CB when the chip CB swings around the support shaft 30. In particular, the restriction shape (concave portion) of the socket member 20 may be formed in an appropriate shape without forming the vicinity of the support shaft 30 in the chip CB in an arc shape.

The cutting tool 1 includes a substantially columnar (or substantially cylindrical) cutter body 10 that can rotate around the cutter rotation axis CZ, and a plurality of chips CB provided at the tip of the cutter body 10 in the direction of the cutter rotation axis CZ. The socket member 20 has a shape that covers at least a part of the cutter body 10.
A plurality of support shafts 30 corresponding to each of the plurality of chips CB are provided at the tip end portion of the cutter body 10 in the direction of the cutter rotation axis CZ. In the milling type cutting tool 1 shown in FIGS. 1 to 4, each of the support shafts 30 is provided on the outer peripheral surface of the cutter body 10 in a direction perpendicular to the cutter rotation axis CZ.

  Each of the tips CB is attached to each support shaft 30, and each tip CB protrudes partly from the cutter body 10 and can swing around the attached support shaft 30. In the milling-type cutting tool 1 shown in FIGS. 1 to 4, a part of the tip CB protrudes in the direction of the cutter rotation axis CZ, and a cutting edge is formed at the protruding portion. As shown in FIG. 1A, the cutting edge has a rake face MS that forms a rake angle θS and a flank face MN that forms a flank angle θN.

In the milling-type cutting tool 1 shown in FIGS. 1 to 4, the socket member 20 is a cylinder that circulates around the outer peripheral surface so as to cover at least a part of the outer peripheral surface of the substantially columnar (or substantially cylindrical) cutter body 10. A plurality of concave regulation shapes that regulate the swing range of each chip CB are formed corresponding to the chips CB. The socket member 20 shown in the example of FIGS. 1A to 1C is a restriction that is part of the restriction shape, and receives the force received from the chip CB that is rotated clockwise as viewed from the A direction and brought into contact with the workpiece. The member 20T supports the rake angle regulating surface 20A.
1A to 1C show an example in which the rake angles of the plurality of chips CB are all changed simultaneously by changing the position of the rotation angle of the socket member 20 with respect to the cutter body 10. In addition, in the cutting tool 1 shown in FIGS. 1-4, when it sees from A direction, the cutting tool 1 is rotated clockwise (clockwise) (the Cudder body 10 and the socket member 20 are rotated together). The surface of the workpiece orthogonal to the cutter rotation axis CZ is cut.

[Example of changing the rake angle of each chip CB (FIGS. 1A to 1C)]
When the position of the rotation angle of the socket member 20 with respect to the cutter body 10 is in the state of FIG. 1A, the rake angle regulating surface 20A formed on the socket member 20 so that the rake angle θS of each chip CB is about +10 degrees. (Regulating member 20T) supports the tip CB (in this case, supports the rear side with respect to the rotation direction of the cutting tool 1).
FIG. 1B shows a state where the socket member 20 is rotated slightly counterclockwise with respect to the cutter body 10 when viewed from the direction A from the state of FIG. In this case, the rake angle regulating surface 20A (regulating member 20T) supports the chip CB so that the oscillating range of the chip CB is changed and the rake angle θS of each chip CB becomes about ± 0 degrees (this In this case, the rear side is supported with respect to the rotation direction of the cutting tool 1).
FIG. 1C shows a state in which the socket member 20 is further rotated counterclockwise with respect to the cutter body 10 when viewed from the A direction from the state of FIG. In this case, the rake angle regulating surface 20A (the regulating member 20T) supports the chip CB so that the oscillating range of the chip CB is changed so that the rake angle θS of each chip CB becomes about −10 degrees. In this case, the rear side is supported with respect to the rotation direction of the cutting tool 1).

[Example in which chips CB are polished together (FIG. 2)]
Next, a method for polishing the tip CB in the milling type cutting tool 1 will be described with reference to FIGS.
FIG. 2A shows a state in which the position of the socket member 20 with respect to the cutter body 10 is adjusted so that the rake angle of the tip CB is about ± 0 degrees. In this case, the rake angle regulating surface 20A regulates the swing range of each chip CB and regulates (supports) the rake angle of each chip CB to be about ± 0 degrees.
The shape of the socket member 20 in FIG. 2 is slightly different from the shape of the socket member 20 shown in FIG. 1, but the shape of the socket member 20 can be various shapes.

From the state of FIG. 2A, the socket member 20 is slightly moved in the cutter rotation axis CZ direction with respect to the cutter body 10 (in the example of FIG. 2B, it is moved in the direction opposite to the Z axis direction). FIG. 2B shows the position. In this case, the polishing position support surface 20B of the regulating member 20T supports the chip CB so that the rake angle θS of each chip CB is about −90 degrees (in this case, the grindstone 50 pressed against the cutting tool 1). And supporting the back side). In the state shown in FIG. 2B, the socket member 20 has the rake angle of the tip CB as an angle orthogonal to the direction of the cutter rotation axis CZ, and the rake face MS of each chip CB is the cutter rotation axis CZ. It coincides with the orthogonal plane orthogonal to.
Then, as shown in FIG. 2B, using a grindstone 50 or the like having a polishing surface MK orthogonal to the cutter rotation axis CZ, a plurality of chips CB aligned with an orthogonal surface orthogonal to the cutter rotation axis CZ. The rake face MS can be polished together (simultaneously). In this case, the rake face MS of the chip CB may be brought into contact with the polishing surface MK, and the cutting tool 1 may be rotated (right-turned when viewed from the A direction).

[Example of a specific structure for fixing the position of the socket member 20 with respect to the cutter body 10 at each position (FIG. 3)]
Next, the example of the specific structure which positions the position of the socket member 20 with respect to the cutter body 10 is demonstrated using FIG. 3 (A)-(C). In the example of FIGS. 3A to 3C, only one chip CB (and the support shaft 30) is shown for explanation, and the swing range of the chip CB is regulated to control the chip. Only one restricting member 20T for changing the rake angle is shown. By using the cutter body 10 and the socket member 20 shown in the example of FIG. 3A, the rake angle of the chip CB can be set to any of +10 degrees, ± 0 degrees, −10 degrees, and −90 degrees. .

The cylindrical surface of the cutter body 10 is provided with a key member 10 a that protrudes so as to correspond to any of the slit-shaped key grooves 20 a to 20 d provided in the socket member 20. Further, key holes 10N and 10M for screwing a fixing screw N for fixing the socket member 20 and the cutter body 10 are provided on the cylindrical surface of the cutter body 10.
Further, the cylindrical surface of the socket member 20 is provided with key grooves 20a to 20d for inserting the key member 10a provided on the cutter body 10 in the cutter rotation axis CZ direction. The cylindrical surface of the socket member 20 is provided with key holes 20N (in this example, long holes) and 20M through which the fixing screw N is inserted.

For example, when the rake angle of the chip CB is set to +10 degrees, as shown in the right figure of FIG. 3B, the key member 10a of the cutter body 10 is inserted into the key groove 20c of the socket member 20, and the fixing screw N Is inserted into the long hole-shaped key hole 20N in the socket member 20 and screwed into the key hole 10N or 10M in the cutter body 10 to be fixed. Then, the rake angle regulating surface 20u of the regulating member 20T in the socket member 20 regulates the swing range of the chip CB, and supports the chip CB so that the rake angle of the chip CB becomes +10 degrees.
Similarly, when the rake angle of the chip CB is set to ± 0 degrees, the key member 10a of the cutter body 10 is inserted into the key groove 20b of the socket member 20 and fixed as shown in the left figure of FIG. The screw N is passed through the long hole-shaped key hole 20N in the socket member 20 and screwed into the key hole 10N or 10M in the cutter body 10 to be fixed. Then, the rake angle regulating surface 20t of the regulating member 20T in the socket member 20 regulates the swing range of the chip CB, and supports the chip CB so that the rake angle of the chip CB becomes ± 0 degrees.
Similarly, when the rake angle of the chip CB is set to -10 degrees, the rake angle regulating surface 20s of the regulating member 20T in the socket member 20 is used to swing the chip CB by using the key groove 20a of the socket member 20. The moving range is restricted, and the chip CB is supported so that the rake angle of the chip CB becomes −10 degrees.

When the rake angle of the chip CB is set to -90 degrees, as shown in FIG. 3C, the key member 10a of the cutter body 10 is inserted into the key groove 20d of the socket member 20, and the fixing screw N is inserted into the socket member. The key hole 20M in 20 is penetrated and screwed into the key hole 10N or 10M in the cutter body 10 and fixed. Then, the polishing position support surface 20v of the regulating member 20T in the socket member 20 regulates the swing range of the chip CB, and supports the chip CB so that the rake angle of the chip CB becomes −90 degrees.
As described above, the position of the rotation angle of the socket member 20 relative to the cutter body 10 or the cutter using the positioning portion constituted by the key member 10a, the key holes 10N and 10M, the key grooves 20a to 20d, and the key holes 20N and 20M. By adjusting at least one of the positions in the rotation axis CZ direction, the rake angle of the chip CB can be easily set to an angle corresponding to the adjusted position.

● [Example of a milling die that cuts a flat surface and the tip shape is substantially triangular (FIG. 4)]
Next, with reference to FIGS. 4A and 4B, an example of the cutting tool 1 in which the shape of the chip CB is substantially triangular in the milling type cutting tool 1 for cutting a plane will be described.
In the position of the socket member 20 with respect to the cutter body 10 shown in the example of FIG. 4A, the rake angle regulating surface 20A of the regulating member 20T supports the chip CB so that the rake angle of each chip CB is about +10 degrees. . From this state, when the socket member 20 is moved in the Z-axis direction (downward in the example of FIG. 4A) along the cutter rotation axis CZ direction, the rake angle gradually increases, and the socket member 20 is As the Z-axis direction is moved in the opposite direction (upward in the example of FIG. 4A), the rake angle gradually decreases.
Further, as shown in the example of FIG. 4B, when the position of the socket member 20 with respect to the cutter body 10 is adjusted and the predetermined surface of the chip CB is brought into contact with the polishing position support surface 20B of the regulating member 20T, the chip CB The rake face MS can be made to coincide with an orthogonal plane orthogonal to the cutter rotation axis CZ.
Then, as shown in FIG. 4 (B), the rake faces MS of the plurality of chips CB having a rake angle θS of −90 degrees are collected using a grindstone having a polishing face MK orthogonal to the cutter rotation axis CZ. It can be polished (at the same time). In this case, the rake face MS of the chip CB may be brought into contact with the polishing surface MK, and the cutting tool 1 may be rotated (right-turned when viewed from the A direction).
Others are the same as the above description in which the shape of the chip CB is substantially square, and the description is omitted.

●● [Second Embodiment (FIGS. 5 to 6)]
● [Example of side cutter type that cuts grooves and the shape of the chip is substantially square (FIG. 5)]
Next, an example of the cutting tool 1 in which the shape of the chip CB is substantially square in the side cutter type cutting tool 1 for cutting a groove will be described with reference to FIG. FIG. 5A shows a side view of the cutting tool 1 (a view seen from a direction orthogonal to the cutter rotation axis CZ), and FIG. 5B is a view seen from the B direction in FIG. The figure is shown.
The cutting tool 1 according to the second embodiment shown in the examples of FIGS. 5A and 5B is different from the cutting tool 1 shown in the examples of FIGS. The difference is that the direction is different and the position and direction of the support shaft 30 are different, the structure of the socket member 20 is different and the position of the rotation angle can be adjusted, but the position in the cutter rotation axis CZ direction cannot be adjusted.
Hereinafter, differences from the cutting tool 1 shown in the examples of FIGS. 1 to 3 will be described.

As shown in FIGS. 5A and 5B, in the side cutter type cutting tool 1, each of the support shafts 30 is provided on the end surface which is a surface orthogonal to the cutter rotation axis CZ in the cutter body 10. It is provided in the CZ direction. Further, a part of the tip CB protrudes in the radial direction of the cutter body 10, and a cutting edge is formed at the protruding portion. As shown in FIG. 5B, the cutting edge has a rake face MS that forms a rake angle θS and a flank face MN that forms a flank angle θN.
As shown in FIG. 5B, the socket member 20 has a disk shape covering the end surface of the cutter body 10 and is rotatable around the cutter rotation axis CZ, and regulates the swing range of each chip CB. A restricting member 20T having a restricting shape is provided corresponding to the chip CB. The socket member 20 supports the force received from the chip CB rotated in the clockwise direction when viewed from the B direction and brought into contact with the workpiece, on the rake angle regulating surface 20A of the regulating member 20T.
By adjusting the position of the rotation angle of the socket member 20 with respect to the cutter body 10 from the state shown in FIG. 5B, the position of the rake angle regulating surface 20A is changed to change the swing regulation range of the chip CB. The rake angle of the chip CB can be changed collectively (at the same time).
In the cutting tool 1 shown in FIG. 5, when viewed from the B direction, the cutting tool 1 is rotated clockwise and the width of the chip CB is set on the surface of the work arranged so as to be parallel to the cutter rotation axis CZ. Cut the groove.

  Although a specific structure for positioning the position of the socket member 20 with respect to the cutter body 10 is omitted in the drawing, a key hole capable of positioning the rotational angle of the socket member 20 with respect to the cutter body 10 is provided on the end surface of the cutter body 10. And a plurality of socket members 20 that face the end face, and may be fixed with a fixing screw or the like using a key hole having a desired rake angle θS.

● [Example of a side cutter type for cutting grooves and an approximately triangular tip shape (FIG. 6)]
Next, an example of the cutting tool 1 in which the shape of the chip CB is substantially triangular in the side cutter type cutting tool 1 for cutting a groove will be described with reference to FIG.
6A and 6B, at the position of the socket member 20 with respect to the cutter body 10, the rake angle regulating surface 20A of the regulating member 20T is a chip so that the rake angle of each chip CB is about +10 degrees. CB is supported. From this state, when the socket member 20 is rotated clockwise around the cutter rotation axis CZ with respect to the cutter body 10 as viewed from the B direction, the rake angle θS gradually increases. Further, when the socket member 20 is rotated counterclockwise as viewed from the B direction, the rake angle θS gradually decreases.
Moreover, since it is the same also about the specific structure which positions the position of the socket member 20 with respect to the cutter body 10, description is abbreviate | omitted.

As described above, if the cutting tool 1 described in the first and second embodiments is used, it is not necessary to prepare a plurality of cutting tools set for the respective rake angles and replace them with cutting tools having desired rake angles. Since the rake angle of the plurality of chips provided in the cutting tool 1 can be changed in a shorter time, the cost can be reduced and the machining time can be further shortened.
Moreover, when grinding | polishing the chip | tip CB, since it can grind | polish without removing the chip | tip CB from the cutting tool 1, the positional accuracy of a blade edge | tip can be improved more.
Further, in the case of the milling type cutting tool 1 for cutting a flat surface (FIGS. 1 to 4), the rake face of the plurality of chips CB can be polished at the same time, so that the polishing can be performed in a shorter time.

The cutting tool 1 and the polishing method of the cutting tool of the present invention are not limited to the appearance, configuration, shape, procedure, and the like described in the present embodiment, and various modifications, additions, and deletions are possible without changing the gist of the present invention. Is possible.
The numerical values used in the description of the present embodiment are examples, and are not limited to these numerical values.

It is a figure explaining a mode that the rake angle of each chip | tip CB of the milling tool which cuts a plane, and the shape of a chip | tip is a substantially rectangular cutting tool 1 is changed. It is a figure explaining the grinding | polishing method of the chip | tip CB of the milling type which cuts a plane, and the shape of the chip | tip of the substantially rectangular cutting tool 1. FIG. In the milling-type cutting tool 1 which cuts a plane, it is a figure explaining the example of the concrete structure which fixes the position of the socket member 20 with respect to the cutter body 10 in each position. It is a figure explaining the example of the milling tool which cuts a plane, and the shape of a chip | tip is a substantially triangular shape. It is a figure explaining the example of the side cutter type | mold which cuts a groove | channel, and the shape of the chip | tip is a substantially square cutting tool. It is a figure explaining the example of the side cutter type | mold which cuts a groove | channel, and the shape of the chip | tip is a substantially triangular cutting tool. It is a figure explaining the example of the conventional milling type cutting tool 100 (blade-tip-integrated cutting tool) which cuts the plane.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cutting tool 10 Cutter body 20 Socket member 20A, 20s, 20t, 20u Rake angle control surface 20B, 20v Polishing position support surface 20T Control member 30 Support shaft 50 Grinding wheel CB Tip CZ Cutter rotation axis MK Polishing surface MN Flank surface MS Rake surface θN clearance angle θS rake angle

Claims (5)

A cutter body rotatable around the cutter rotation axis;
In a cutting tool comprising a plurality of chips provided at the tip of the cutter body in the cutter rotation axis direction,
A plurality of support shafts corresponding to each of the plurality of chips are provided at the tip of the cutter body,
Each of the tips is attached to each of the support shafts, and a part of the tip protrudes from the cutter body, and is swingable around the attached support shaft,
Furthermore, it has a shape that covers at least a part of the cutter body, and includes a socket member formed with a regulation shape capable of regulating the swing range of each of the chips,
By adjusting the position of the socket member with respect to the cutter body and changing the swing range of each of the chips, the rake angle of the plurality of chips can be adjusted simultaneously,
Cutting tools. The cutting tool according to claim 1,
Each of the plurality of support shafts is provided on the outer peripheral surface of the cutter body in a direction orthogonal to the cutter rotation axis,
Each of the plurality of tips has a part of the tip protruding in the cutter rotation axis direction with respect to the cutter body, and a cutting edge is formed in the protruding portion.
The socket member has a shape that goes around the outer peripheral surface of the cutter body,
The cutter body and the socket member include a positioning portion that positions the socket member with respect to the cutter body,
The angle corresponding to the adjusted position of the rake angle of the chip by adjusting at least one of the position of the rotation angle of the socket member relative to the cutter body or the position in the cutter rotation axis direction using the positioning portion. Having a structure that can be set to
Cutting tools. The cutting tool according to claim 1 or 2,
The socket member has a structure capable of matching a rake face that forms a rake angle of the chip by adjusting a position with respect to the cutter body with an orthogonal face orthogonal to the cutter rotation axis.
Cutting tools. A cutting tool polishing method for polishing each of the chips using the cutting tool according to claim 3,
Using a polishing surface orthogonal to the cutter rotation axis, simultaneously polishing each of the rake surfaces matched with the orthogonal surface,
Cutting tool polishing method. The cutting tool according to claim 1,
Each of the plurality of support shafts is provided in an end surface that is a surface orthogonal to the cutter rotation axis at the tip of the cutter body, in the cutter rotation axis direction,
Each of the plurality of tips has a part of the tip protruding in the radial direction of the cutter body, and a cutting edge is formed in the protruding portion.
The socket member has a shape covering at least a part of the end surface of the cutter body,
The cutter body and the socket member include a positioning portion that positions the socket member with respect to the cutter body,
By adjusting the position of the rotation angle of the socket member with respect to the cutter body using the positioning unit, the rake angle of the chip can be set to an angle corresponding to the adjusted position.
Cutting tools.

Images