JP2008100330A - Cutting tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutting tool which can suppress the wear and deformation of a tool body caused by a cutting force and the use for a long time period, and can keep the accuracy of the tool body high for a long time period, and can elongate the life of the tool body by reducing the cutting force to be applied to each of the inserts in cutting. <P>SOLUTION: In the cutting tool 1, the tool body 2 is turned about an axis O. First recessed portions are formed on outer periphery side of both side surfaces of the tool body 2. First attaching seats are provided in the first recessed portions. First inserts 40 are attached on the first attaching seats. First supporting plates 5 are detachably attached to the rear side of the first inserts 40 in the turning direction T of the tool in the first recessed portions so as to support the rear side of the first inserts 40 in the turning direction T. The first supporting plates 5 have an L shape in the side view of the tool body 2, wherein the L shape is formed such that a base portion and an elongated portion are integratedly formed, which elongated portion has the width narrower than that of one side of the square formed by the base portion, and elongates from the one side toward the outer periphery side of the tool body. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cutting tool in which an insert can be freely attached to and detached from a mounting seat provided in a concave portion formed on a side surface and an outer peripheral portion of a disk-shaped tool body.

  Conventionally, for example, a caliper that supports a brake pad in a disc brake requires that the surfaces facing the brake pad be processed in parallel with each other. Inserts are installed in the provided recesses, and the inner side surfaces facing the pad of the disc formed inside the caliper are cut by the inserts provided on both side surfaces thereof, and at the same time, the inserts provided on the outer peripheral portion are used to insert the disc. The bottom surface facing the outer peripheral portion is cut, and the parallelism between the inner side surfaces and the perpendicularity of the inner side surfaces to the bottom surface are cut with high accuracy.

In such a cutting tool (for example, a side cutter), a plurality of concave portions are provided on the outer peripheral portion of the disk-shaped tool body that is rotated around the axis and on both side surfaces, and are spaced apart in the circumferential direction on the outer peripheral portion of the tool body. An insert is directly attached to a mounting seat formed in plural and extending rearward in the tool rotation direction of these recesses, for example, as described in Patent Document 1, or fixed by joining means such as spot welding. It is detachably attached via a plate.
JP 2001-38517 A

  By the way, in such a cutting tool, when a large cutting force is applied to the insert during cutting, or when the mounting seat or the plate fixed to the mounting seat is worn or deformed with long-term use, the static force at the time of mounting the insert is reduced. As a result, it becomes difficult to ensure dynamic accuracy such as mechanical accuracy and chatter during cutting, and the product accuracy is reduced. For this reason, it is important that the insert is accurately arranged and maintained with respect to the mounting seat of the tool body, and particularly important on both side surfaces where a balance during cutting and high machining accuracy are required.

  Therefore, in order to accurately place and maintain the insert with respect to the mounting seat of the tool body, the cutting load of each insert can be reduced by increasing the number of inserts placed on the tool body, and the mounting seat formed in the recess. Correction, or removing the plate fixed to the concave portion by the joining means from the concave portion and attaching a new plate. However, the increase in the number of inserts has a limitation on the installation space, and there is a problem that a lot of man-hours are required for correcting the mounting seat and replacing the plate, and the cost is not profitable. .

  The present invention has been made in view of such circumstances, and in a cutting tool in which an insert is mounted on a mounting seat provided in a recess formed in the outer peripheral portion of both side surfaces of a tool body, the cutting tool acts on each insert during cutting. By reducing the cutting force to be used, the cutting force and the tool body wear and deformation due to long-term use can be suppressed, the tool body can be maintained with high accuracy over a long period of time, and the cutting tool that can extend the life of the tool body is provided The purpose is to do.

In order to achieve the above object, the present invention provides the following means.
According to the first aspect of the present invention, a first mounting seat is provided in a first recess formed on the outer peripheral side of both side surfaces of a disk-shaped tool body rotated about an axis, and the first mounting seat A first insert having a cutting edge is detachably mounted, and a second mounting seat is provided in a second recess formed in the outer peripheral portion of the tool body, and the second mounting seat has a cutting edge. A cutting tool in which a second insert having a blade is detachably mounted, and the rotation of the first insert is behind the first recess in the tool rotation direction of the first insert. A first support plate that supports the rear side in the direction is detachably attached. The first support plate can be fitted into the first recess and is substantially square in a side view of the tool body. If the width of the base is narrower than one side of the square Is a extended portion extending straight in the tool body outer peripheral side an L-shape formed integrally, and said base is characterized in that mounted on the tool body.

According to the cutting tool according to the present invention, when the first insert is attached to the first mounting seat of the first recess formed on the outer peripheral portion of the both side surfaces of the tool body, the tool insert rotates rearward in the tool insertion direction. Since the first insert is attached to the tool body through a first support plate that is detachable from the tool body, even when a large cutting force is applied during cutting or when the tool body is used for a long time, Wear and deformation of the first recess are suppressed. In addition, when the first support plate is worn or deformed, the first insert can be attached to the first mounting seat in the same state as when the tool body is new by replacing only the first support plate. It becomes.
As a result, the accuracy of the tool body can be maintained over a long period of time, and the life of the tool body can be extended, thereby reducing the processing cost related to cutting.
In addition, since the base portion of the first support plate is attached to the tool main body, a sufficient attachment force can be ensured when attaching the first support plate, and the outer periphery side of the first support plate can be secured. By making the width in the direction smaller than the inner peripheral side, it is possible to increase the number of first inserts that can be mounted while securing a sufficient space in the first mounting seat.

  A second aspect of the present invention is the cutting tool according to the first aspect, wherein the base portion of the first support plate is attached to the tool body by a mounting bolt.

  According to the cutting tool of the present invention, since the first support plate is attached to the first attachment seat by the attachment bolt, attachment / detachment is easy and reliable attachment / detachment can be performed in a short time.

  Invention of Claim 3 is the cutting tool of Claim 1 or Claim 2, Comprising: On the back side of the tool rotation direction of the said 2nd insert of the said 2nd recessed part, said 2nd The second support plate for supporting the rear side in the rotational direction of the insert is detachably attached by a mounting bolt.

According to the cutting tool of the present invention, when the second insert is attached to the second mounting seat formed in the concave portion of the outer peripheral portion of the tool body, the second support plate that is detachable from the tool body is interposed. Since the second insert is attached, wear and deformation of the recess formed in the outer peripheral portion of the tool body are suppressed even when a large cutting force acts during cutting or when used for a long period of time. . In addition, when the second support plate is worn or deformed, the second insert can be attached to the second mounting seat in the same state as when the tool body is new by replacing only the second support plate. It becomes.
As a result, the processing cost related to cutting can be reduced.

According to the cutting tool according to the present invention, the first support plate configured to be detachable from the tool body when the first insert is attached to the first recesses formed on the outer peripheral portions of both side surfaces of the tool body. Therefore, when a large cutting force is applied during cutting or when the tool is used for a long time, wear and deformation of the tool body can be suppressed, and as a result, the accuracy of the tool body can be maintained for a long time. The tool life can be extended.
As a result, the processing cost related to cutting can be reduced.

1 to 6 show an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a cutting tool, and reference numeral 2 denotes a tool body.
In this embodiment, the cutting tool 1 is a side cutter provided with a substantially disc-shaped tool body 2 having an outer shape centered on the axis O, and rotates around the axis O in the tool rotation direction indicated by a symbol T in the drawing. By doing so, the cutting tool 1 is used for cutting at the positions corresponding to the outer peripheral portion and the outer peripheral portion on both side surfaces.

  As shown in FIGS. 1 and 2, the cutting tool 1 includes a tool body 2, a plurality of first inserts 40 made of a hard material such as cemented carbide attached to the outer peripheral portions of both side surfaces of the tool body 2, and a tool A plurality of second inserts 50 made of a hard material such as cemented carbide attached to the outer periphery of the main body 2, and the tool main body 2 is located on the rear side in the tool rotation direction T of each first insert 40. The first support plate 5 made of, for example, steel (SKD61), which is softer than the first insert 40 that supports the second insert 50, and the second insert 50 that supports the rear side in the tool rotation direction T of each second insert 50. The second support plate 7 made of, for example, a softer steel material (SKD61) is provided.

FIG. 3 is a cross section including the axis O of the tool body 2, and the tool body 2 has a boss portion 27 with a mounting hole formed in the center from the radially inner side to the outer side with the axis O as the center. The rib portion 29 and the outer ring portion 28 are provided, and the end surface 27A on one side of the boss portion 27 is recessed in the direction of the axis O of the tool body 2 from the side surface 28A on one side of the outer ring portion 28. The other end surface 27B of the boss portion 27 is formed so as to protrude from the other side surface 28B of the outer peripheral ring portion 28, and the center of the boss portion 27 extends from the one end surface 27A to the other side. A mounting hole penetrating the end face 27B is formed, and a keyway is formed on the other end face 27B.
In addition, a plurality of holes 29A are formed in the rib portion 29 in order to reduce the weight of the tool body 2.

Further, the tool body 2 is recessed in the outer peripheral portion 2C from the outer peripheral portion 2C to the inner peripheral side when viewed from the direction of the axis O, penetrates the tool main body 2 in the axis O direction, and is spaced in the circumferential direction. A plurality of formed chip pockets 3 are provided, and the outer periphery of each of the chip pockets 3 and the tool body 2 is provided on the outer peripheral side of both side surfaces 28A and 28B on the rear side in the tool rotation direction T of each chip pocket 3. A first recess 4 and a second recess 6 are formed in the portion 2C and the side surfaces 28A and 28B. The first recess 40 is provided with a first mounting seat 8 in the first insert 40. However, the second recess 6 is provided with a second mounting seat 9 so that the second inserts 50 can be accommodated.
The first insert 40 and the second insert 50 are configured such that cutting trajectories are continuous on the side surfaces 28A and 28B of the outer peripheral portion 2C.

In the present embodiment, as shown in FIGS. 6A, 6B, and 6C, the first insert 40 attached to the first attachment seat 8 has a square plate shape, Two parallel square surfaces 41 and four side surfaces 42 arranged to be orthogonal to the two square surfaces 41 are provided. The intersections of the two square surfaces 41 and the side surfaces 42 have an arcuate cross section, and the side surfaces 42 are formed from the four vertices of the side ridges of the square surface 41 when viewed from the direction facing the square surface 41. An inclined surface that goes to the central portion of the square surface 41 as it goes to the central portion and a gently curved surface that cuts to the outer peripheral side from this inclined surface to the center of the side ridge portion are formed, of which the inclined surface is a rake face A cutting edge 41 </ b> A is formed at the intersecting ridge line portion of the rake face 43, the four side faces 42, and the two square faces 41.
Further, a mounting hole 45 penetrating the two square surfaces 41 of the first insert 40 is formed at the center of the square surface 41 of the first insert 40, and the opening of the mounting holes 45 in the two square surfaces 41 is formed. Each portion is formed with a tapered portion that gradually increases in diameter.

On the rear side of the first recess 40 in the tool rotation direction T of the first insert 40, a first support plate 5 that supports the rear side of the first insert 40 in the tool rotation direction T is attached by a mounting bolt 5K. A first insert 40 is detachably mounted on the front side of the first support plate 5 in the tool rotation direction T by a mounting bolt 46.
On the rear side of the second recess 6 in the tool rotation direction T of the second insert 50, a second support plate 7 that supports the rear side of the second insert 50 in the tool rotation direction T is attached by the mounting bolt 7H. The second insert 50 is detachably mounted on the front side of the second support plate 7 in the tool rotation direction T by a mounting bolt 56.

  The first recess 4 is defined by a recess 4A and a recess 4B. The recess 4A is directed from the side surfaces 28A, 28B of the outer peripheral ring portion 28 of the tool body 2 in the direction of the axis O of the tool body 2. And is opened to the chip pocket 3, the outer peripheral portion 2 </ b> C, and the side surfaces 28 </ b> A and 28 </ b> B, and the concave portion 4 </ b> B is further recessed in the direction of the axis O and the inner peripheral side of the tool body 2 from the concave portion 4 </ b> A. It is formed into an L-shape that is open to the concave portion 4A, the outer peripheral portion 2C, and the side surfaces 28A and 28B, and the inner peripheral portion of the tool body 2 is bent to the rear side in the tool rotation direction T when viewed from the axis O direction. ing.

  The concave portion 4A includes a flat bottom surface 4C continuous to the chip pocket 3 and the outer peripheral portion 2C, and a wall surface 4D formed perpendicular to the bottom surface 4C and continuous to the side surfaces 28A and 28B. The concave portion 4B is formed from the bottom surface 4C. A flat bottom surface 4E formed to be recessed in one step in the axis O direction and continuous to the outer peripheral portion 2C; a flat wall surface 4F continuous to the side surfaces 28A and 28B and the outer peripheral portion 2C facing the tool rotation direction T and perpendicular to the bottom surface 4E; And a flat wall surface 4G forming the bottom of the L-shape constituting 4B.

  The first support plate 5 is disposed in the recess 4B formed on the rear side of the recess 4A in the tool rotation direction T, and the first support plate 5 contacts the bottom surface 4E, the wall surface 4F, and the wall surface 4G. The mounting bolt 5K is detachably mounted by being screwed into a screw hole formed in the bottom surface 4E.

  The first support plate 5 has an L-shaped block shape that can be fitted into the recess 4B. That is, when the tool body 2 is viewed from the side, one rectangular corner is cut out along the long side of the rectangle. The base 5A having a substantially square shape in the same side view and the extending portion 5B which is narrower than one side of the square formed by the base 5A and extends straight from the one side are integrally formed. The mounting bolt 5K is inserted through the base portion 5A.

  The first support plate 5 includes a flat lower surface 5D that can be in close contact with the bottom surface 4E from the base portion 5A to the extension portion 5B, a side surface 5E that can be in close contact with the wall surface 4F on the extension portion 5B, and the base portion. 5A is provided with a side surface 5F capable of closely contacting the wall surface 4G, the base portion 5A is directed to the inner peripheral side of the tool body 2 and the extending portion 5B is extended to the outer peripheral side, so that these surfaces 4E, 4F, 4G and the surfaces 5D, 5E, and 5F are in close contact with each other, and the upper surface 5G opposite to the lower surface 5D is directed toward the tool rotation direction T of the tool body 2 with the first support plate 5 mounted in the recess 4B. The side surface 5H that is inclined so as to slightly protrude from the side surfaces 28A and 28B of the outer ring portion 28 and faces the tool rotation direction T opposite to the side surface 5E is located on the rear side of the recess 4A in the tool rotation direction T. Tool rotation method To face T, also side 5J aspect 5F opposite is adapted to be flush with the outer peripheral portion 2C of the tool body 2. The side surface 5H forms a part of the first mounting seat 8, and the first insert 40 is mounted on the first mounting seat 8.

The first mounting seat 8 is defined by the bottom surface 4C and the wall surface 4D of the recess 4A and the side surface 5H of the first support plate 5. As shown in FIGS. 1, 2, and 4, When the bottom surface 4C is viewed from the direction of the axis O, the side located on the outer peripheral portion 2C side of the tool body 2 of the first insert 40 having a substantially square outer shape disposed on the first mounting seat 8 has a tool rotation direction T. Is formed so as to be slightly inclined outwardly in the radial direction of the tool body 2 and escapes even toward the inner peripheral side, and the square surface 41 of the first insert 40 on each side surface 28A, 28B side is formed. The outer circumferential ring portion 28 is inclined so as to slightly protrude from the side surfaces 28A and 28B.
With such a configuration, clearance angles are given to the outer peripheral portion 2C side of the first insert 40 and the side surfaces 28A and 28B.

  The second insert 50 attached to the second attachment seat 9 has a substantially rectangular flat plate shape having an isosceles trapezoidal shape with a flat cross section perpendicular to the longitudinal direction, that is, a rectangular upper surface 51, and the rectangular shape and the long shape. A lower surface 52 having the same width and a shorter width, two side surfaces 53 formed by connecting the long side of the upper surface 51 and the long side of the lower surface 2, and the isosceles as shown in FIG. Two side surfaces 54 having a trapezoidal shape are provided, and a cutting edge 55 is formed at the intersecting ridge line portion of the upper surface 51 and the side surface 53.

  As shown in FIG. 5, the second recess 6 is defined by a recess 6 </ b> A and a recess 6 </ b> B, and the recess 6 </ b> A is formed to be recessed from the outer periphery 2 </ b> C of the tool body 2 to the inner periphery. The chip pocket 3, the outer peripheral portion 2 </ b> C, and the side surfaces 28 </ b> A and 28 </ b> B are opened, and the concave portion 6 </ b> B is formed shallower than the concave portion 6 </ b> A in the axis O direction of the tool body 2. And is open to the recess 6A, the outer peripheral portion 2C, and the side surfaces 28A and 28B.

  The concave portion 6A includes a flat bottom surface 6C that is continuous with the side surfaces 28A and 28B of the chip pocket 3 and the outer peripheral annular portion 28, and a wall surface 6D that is formed perpendicular to the bottom surface 6C and is continuous with the outer peripheral portion 2C. 6B includes a flat bottom surface 6E which is formed to be recessed by one step in the inner circumferential direction from the bottom surface 6C and is continuous with the side surfaces 28A and 28B of the outer circumferential ring portion 28, and is formed perpendicular to the bottom surface 6E so as to face the tool rotation direction T. 28A, 28B and a flat wall surface 6G connected to the outer peripheral portion 2C, and a flat wall surface 6G formed perpendicular to the bottom surface 6E and the wall surface 6F and connected to the outer peripheral portion 2C.

  Among these, the bottom surface 6C is formed in a rectangular shape extending in the direction of the axis O, and the second support plate 7 is disposed in the recess 6B formed on the rear side in the tool rotation direction T of the recess 6A. The support plate 7 is in contact with the bottom surface 6E, the wall surface 6F, and the wall surface 6G, and is detachably mounted by screwing a mounting bolt 7G into a screw hole formed in the bottom surface 6E.

  The second support plate 7 has a substantially rectangular parallelepiped block shape that can be fitted into the recess 6B, that is, a flat lower surface 7A that can be in close contact with the bottom surface 6E and side surfaces 7B and 7C that can be in close contact with the wall surfaces 6F and 6G. In the state where these surfaces 6E, 6F, 6G and the surfaces 7A, 7B, 7C are in close contact with each other and the second support plate 7 is mounted in the recess 6B, the upper surface on the side opposite to the lower surface 7A. 7D is formed in parallel to the tangent line at the outer peripheral portion 2C of the tool body 2, and is connected to the rear side in the tool rotation direction T on the opposite side to the side surface 6F. The side surfaces 28A and 28B of the annular portion 28 are flush with each other. The side surface 7 </ b> B forms a part of the second mounting seat 9, and the second insert 50 is attached to the second mounting seat 9.

  The second mounting seat 9 is defined by a bottom surface 6C of the recess 6A, a side surface 7E of the second support plate 7, and a wall surface 6D, as shown in FIGS. 5 (A) and 5 (B). When viewed from the direction of the axis O, the bottom surface 6C is inclined so that the rear side in the tool rotation direction T escapes toward the inner peripheral side and the upper surface 51 of the second insert 50 slightly protrudes on the front side in the tool rotation direction T. The side surface 7E is formed to be complementary to the side surface 53 of the second insert, and the wall surface 6D is formed in parallel with the side surfaces 28A and 28B and the distance from the side surfaces 28A and 28B is the second. It is formed to be slightly smaller than the width of the cutting edge 55 of the insert 50, and is configured such that the side surface 54 slightly protrudes from each of the side surfaces 28A and 28B when the second insert 50 is mounted.

  With respect to the arrangement of the first mounting seat 8 and the second mounting seat 9 configured as described above, the tool body 2 has one of the tool bodies 2 with respect to one chip pocket 3 as shown in FIG. The side surface 2A side and the other side surface 2B side are both the first mounting seat 8, the one side surface 2A side is the second mounting seat 9, and the other side surface 2B side is the first mounting seat 8. And a third combination in which one side surface 2A side is a first mounting seat 8 and the other side surface 2B side is a second mounting seat 9. The first combination, the second combination, and the third combination are arranged in the circumferential direction of the tool body 2 in this order.

  Here, the first insert 40 is attached to the first mounting seat 8 on the one side surface 2A side and the first mounting seat 8 on the other side surface 2B side. One of the square surface 41 side portions is used for cutting. Therefore, the first insert 40 can be used four times by rotating the first insert 40 by 90 ° around the center and changing the positions of the four cutting edges 41A located on the outer peripheral portion 2C. Furthermore, it can be used a total of eight times by re-attaching to the first mounting seat 8 on the opposite side surface of the tool body 2.

According to the cutting tool 1 according to the above-described embodiment, when the first insert 40 is attached to the first mounting seat 8 of the first recess 4 formed on the outer peripheral portion of both side surfaces of the tool body 2, Since the first insert 40 is attached to the back side of the tool rotation direction T of the insert 40 via the first support plate 5 that is detachable from the tool body 2, a large cutting force is applied during cutting or for a long time. Even when it is used over the range, the wear and deformation of the first recess 4 of the tool body 2 are suppressed. Further, when the first support plate 5 is worn or deformed, only the first support plate 5 is replaced, so that the first insert 40 is attached to the first mounting seat 8 in the same state as when the tool body 2 is new. It becomes possible to attach to.
As a result, it is possible to extend the life of the tool body while maintaining the accuracy of the tool body 2 over a long period of time.
As a result, the processing cost related to cutting can be reduced.

  Further, since the first support plate 5 has the side surface 5H on the rear side in the tool rotation direction T, the cutting force from the front in the tool rotation direction of the first insert 40 is not directly applied to the wall surface 4F. As a result, the wear and deformation of the tool body 2 by the first insert 40 when cutting is suppressed.

  In addition, the first support plate 5 and the second support plate 7 are formed of, for example, an SKD 61 having a hardness of HRC50, and the tool body 2 is formed of, for example, an SCM 440 of a hardness of HRC32. 2 has a higher hardness than that of the tool body 2, so that a larger cutting force acts than when the first insert 40 and the second insert 50 are directly mounted on the tool body 2. Even in this case, wear and deformation of the tool body 2 can be suppressed.

Moreover, since the 1st support plate 5 is attached to the 1st attachment seat 8 with the attachment volt | bolt 5K, attachment / detachment is easy and can attach / detach the 1st support plate 5 reliably in a short time.
Further, the first support plate 5 is attached to the extension portion 5B by the attachment bolt 5K inserted through only the base portion 5A without using an attachment bolt or the like, and thus extends to the outer peripheral side of the first support plate 5. The circumferential width of the extending portion 5B can be made smaller than that of the inner peripheral side. As a result, even when there are many first inserts 40, the space for mounting on the first mounting seat 8 can be sufficiently secured. The first support plate 5 can be provided with a sufficient mounting strength, and therefore the mounting strength of the first insert 40 can be sufficiently secured.

  In the above embodiment, the first support plate 5 and the second support plate 7 are made of the SKD 61, the tool body 2 is made of the SCM 440, and the first support plate 5 and the second support plate. Although the case where the hardness of 7 is higher than the hardness of the tool body 2 has been described, the first support plate 5, the second support plate 7, and the tool body 2 can be made of a material different from the above materials. In that case, the relative hardness of the first support plate 5, the second support plate 7 and the tool body 2 may be configured in the same order as described above or in the order opposite to that in the embodiment. Is possible.

  In the above embodiment, the arrangement of the first mounting seat 8 and the second mounting seat 9 in the tool body 2 has the above-described first combination, second combination, and third combination. Although the case where it arrange | positions in the circumferential direction of the tool main body 2 in order of 1st combination, 2nd combination, and 3rd combination was demonstrated, combination and arrangement | positioning of the 1st mounting seat 8 and the 2nd mounting seat 9 Needless to say, can be arbitrarily selected.

Moreover, in the said embodiment, although the case where the square flat plate-shaped 1st insert 40 was attached to the tool main body 2 was demonstrated, inserts, such as an ellipse, a triangle, and a polygon which has a side more than a pentagon, are used, for example. In this case, it goes without saying that the shape of the first support plate 5 can be changed in accordance with the shape of the first insert 40.
The same applies to the shape of the second insert 50 and other specifications.

It is a front view showing one embodiment of the present invention. It is a detailed view of the cutting tool in FIG. It is a longitudinal cross-sectional view containing the axis line of the cutting tool in FIG. It is a figure which shows the detail of the 1st recessed part of the cutting tool which concerns on this invention, a 1st insert, and a 1st support plate, (A) was seen from the outer peripheral part side, (B) was seen from the side surface side. FIG. It is a figure which shows the detail of the 2nd recessed part of the cutting tool which concerns on this invention, a 2nd insert, and a 2nd support plate, (A) was seen from the outer peripheral part side, (B) was seen from the side surface side. FIG. It is a figure which shows an example of the 1st insert attached to the 1st recessed part of the cutting tool which concerns on this invention, (A) is a side view, (B) is a top view, (C) is (B). It is a longitudinal cross-sectional view in the arrow line Y of the shown top view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cutting tool 2 Tool main body 4 1st recessed part 5 1st support plate 6 2nd recessed part 7 2nd support plate 8 1st mounting seat 9 2nd mounting seat 40 1st insert 50 2nd insert O Axis of tool body 2 T Tool rotation direction 2A One side surface 2B The other side surface 2C Outer peripheral portion 5A Base portion 5B Extension portion 5K Mounting bolt

Claims (3)

A first insert having a first mounting seat in a first recess formed on the outer peripheral side of both side surfaces of a disk-shaped tool body rotated about an axis, and having a cutting edge in the first mounting seat Is detachably mounted,
A cutting tool in which a second mounting seat is provided in a second recess formed in an outer peripheral portion of the tool body, and a second insert having a cutting edge is detachably mounted on the second mounting seat. And
A first support plate that supports the rear side in the rotational direction of the first insert is detachably attached to the rear side of the first recess in the tool rotational direction of the first insert,
The first support plate can be fitted into the first recess, and is narrower than the side of the square formed by the substantially square base and the base in the side view of the tool body. A cutting tool characterized by having an L-shape integrally formed with an extending portion extending straight to the outer peripheral side of the tool body, and the base portion being attached to the tool body. The cutting tool according to claim 1,
The cutting tool, wherein the first support plate has the base attached to the tool body by a mounting bolt. The cutting tool according to claim 1 or 2,
On the rear side of the second insert in the tool rotation direction of the second recess, a second support plate that supports the rear side in the rotation direction of the second insert is detachably attached by a mounting bolt. A cutting tool characterized by that.

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