WO2014181842A1

WO2014181842A1 - Tool edge adjustment mechanism

Info

Publication number: WO2014181842A1
Application number: PCT/JP2014/062402
Authority: WO
Inventors: 義昭袴田
Original assignee: 株式会社タンガロイ
Priority date: 2013-05-09
Filing date: 2014-05-08
Publication date: 2014-11-13
Also published as: JP5971577B2; JPWO2014181842A1

Abstract

The present invention relates to a tool edge adjustment mechanism for adjusting the positions of the tool edges of cutting inserts (4) that are detachably mounted on the tool body (2) of a cutting tool. The tool edge adjustment mechanism (1) is provided with first adjustment means (5) for adjusting the positions of the cutting insert tool edges and second adjustment means (6) for adjusting the positions of the cutting insert tool edges. The second adjustment means (6) are able to move the positions of the cutting insert (4) tool edges in substantially the same direction as the direction of adjustment of the positions of the cutting insert (4) tool edges by the first adjustment means (5). The precision of adjustment in the positions of the tool edges differs between the first adjustment means and the second adjustment means.

Description

Blade adjustment mechanism

The present invention relates to a blade edge adjusting mechanism for a blade edge replaceable cutting tool. In particular, the present invention relates to a blade edge adjusting mechanism used for adjusting the position of a cutting edge in a cutting insert that is detachably attached to a tool body of a cutting edge exchangeable cutting tool.

The cutting edge exchanging cutting tool may be provided with a cutting edge adjusting mechanism for adjusting the cutting edge position (cutting edge position) of the cutting insert. In particular, in a rotary cutting tool such as a face mill having a plurality of cutting inserts, a cutting edge adjusting mechanism is often required to align the cutting edge position of each cutting insert, that is, the protruding amount of each cutting edge. This is because, since a plurality of cutting inserts are involved in cutting, variations in the protruding amount of each cutting edge adversely affects the finished surface and the cutting edge life. Such variation in the protruding amount of each cutting edge is caused in part by a dimensional error in manufacturing the cutting insert or the tool body.

Patent Document 1 discloses an example of a blade edge adjusting mechanism. In Patent Document 1, a cutting edge adjustment mechanism is applied to adjust the position of the front cutting edge on the tool tip side of this cutting insert in a cutting tool in which the cutting insert is attached to the outer periphery of the tip of the tool body rotated around the axis. Has been. The cutting insert is pressed and fixed to the bottom wall surface of the insert mounting seat of the tool body by a fixing wedge member that is attached in front of the cutting insert in the tool rotation direction. A first recess is formed ahead of the insert mounting seat to which the cutting insert is attached in the tool rotation direction. The first recess is formed so that its width gradually becomes narrower toward the inner side, and a fixing wedge member can be inserted. The block-shaped fixing wedge member is provided with a first screw hole, and on the other hand, a second screw hole is formed in the first recess of the tool body so as to be twisted in the direction opposite to the first screw hole. Yes. The first screw hole and the second screw hole are screwed with screws having male screw portions respectively engaged with the first and second screw holes at both ends. The cutting insert can be pressed by rotating the screw and pushing the fixing wedge member into the inner peripheral side of the first recess of the tool body, that is, the back. In this way, a second recess is provided on the tool rear end side of the insert mounting seat to which the cutting insert can be fixed, and an adjusting wedge member as a blade edge adjusting member is inserted therein. The block-shaped adjusting wedge member is provided with a third screw hole, and on the other hand, a fourth screw hole is formed in the second recess of the tool body so as to be twisted in the direction opposite to the third screw hole. Yes. The third screw hole and the fourth screw hole are screwed with screws having male screw portions respectively engaged with the third and fourth screw holes at both ends. By rotating this screw, the adjusting wedge member is pushed into the back of the second recess, whereby the adjusting wedge member can press the cutting insert of the insert mounting seat toward the tool tip side. As a result, the position of the cutting edge of the cutting insert fixed to the insert mounting seat of the tool body is finely adjusted. Thereby, the deviation of the cutting edge position of each cutting insert due to a manufacturing error can be eliminated.

Further, Patent Document 2 discloses a face mill provided with two adjustment mechanisms. In this front milling machine, a locator having a cutting edge is attached to the recess of the milling body. Between the milling body and the locator, there are provided a locator vertical position adjusting mechanism and a locator tilt adjusting mechanism. Each of these adjustment mechanisms uses a cam mechanism. According to the description of Patent Document 2, after the milling body is fixed to the milling machine, the locator is forcibly finely moved by these two adjusting mechanisms, so that the vertical position and the inclination state of the cutting edge can be accurately (1 μm). Try to adjust (in units).

JP 2001-246515 A JP 58-66611 A

By the way, in the field of cutting edge-exchangeable cutting tools, there is a case where so-called re-grinding is performed by making the cutting blade usable again by grinding the cutting insert worn by cutting. By re-grinding, the cutting insert can be reused, but the cutting edge position is retracted from the initial state by the amount removed by re-grinding. This amount of retraction is much larger than the manufacturing error described above. For example, the manufacturing error is about 0.05 to 0.10 mm, while the retraction amount of the cutting edge by re-grinding is about 0.2 to 3 mm.

When the re-ground cutting insert is mounted on a tool having a blade edge adjusting mechanism as described in Patent Document 1, the following problems occur. The general blade edge adjustment mechanism as described in Patent Document 1 is intended to perform highly accurate blade edge position adjustment in order to cope with manufacturing errors, and thus the range in which the blade edge position can be adjusted. (Adjustment amount) is slight. Therefore, there is a case where the amount of adjustment of the blade edge position is insufficient for the cutting insert that has been reground and whose cutting edge position has largely retreated. In other words, the cutting edge of the cutting insert does not protrude from the tool tip of the tool body even if the adjustment width by the blade edge adjustment mechanism is maximized so as to maximize the protruding amount of the cutting insert. There was a case.

On the other hand, in Patent Document 2, as described above, the locator is moved by two adjustment mechanisms to adjust the vertical position and tilt state of the locator cutting edge with high accuracy. As described above, the two adjustment mechanisms of Patent Document 2 are directed to highly accurate adjustment of the blade tip position, and do not correspond to the shortage of the protruding amount of the cutting blade of the cutting insert from the tool body.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a blade edge adjusting mechanism capable of appropriately positioning a cutting blade of a cutting insert at a desired position.

According to one aspect of the invention,
A blade edge adjusting mechanism for adjusting a blade edge position of a cutting insert that is detachably attached to a tool body of a cutting tool,
First adjusting means configured to adjust the cutting edge position of the cutting insert;
A second adjusting means configured to adjust the position of the cutting edge of the cutting insert, the second adjusting means being in a direction including a component of an adjustment direction of the cutting edge position of the cutting insert by the first adjusting means. There is provided a blade edge adjustment mechanism comprising second adjustment means configured to move the cutting insert.

According to the blade edge adjusting mechanism of one aspect of the present invention having the above-described configuration, the first adjustment means for adjusting the blade edge position of the cutting insert and the second adjustment means for adjusting the blade edge position of the cutting insert By each, the cutting edge position of the cutting insert can be adjusted in the adjustment direction of the cutting edge position by the first adjusting means. Therefore, by the blade edge adjustment mechanism including the first adjustment means and the second adjustment means, for example, both high-precision blade edge position adjustment with a small adjustment amount and rough blade edge position adjustment with a large adjustment amount. Can be executed. Therefore, even if it is a cutting insert in which the cutting edge position is largely retracted by re-grinding, the blade edge position can be adjusted appropriately, and the cutting edge can be appropriately positioned at a desired position.

The second adjusting means may be configured to be able to move the cutting insert in substantially the same direction, preferably in the same direction as the adjusting direction of the cutting edge position of the cutting insert by the first adjusting means.

Preferably, the blade edge adjusting mechanism is a cartridge that is detachably attached to the tool body, and further includes a cartridge in which a cutting insert is disposed. In this case, the first adjusting means is provided between the tool body and the cartridge and acts on the cutting insert through the cartridge, and the second adjusting means is provided between the cartridge and the cutting insert. It is good to act directly on the cutting insert.

Preferably, one of the first adjusting means and the second adjusting means may be configured so that the cutting edge position of the cutting insert can be adjusted with the first accuracy. In this case, it is more preferable that the other of the first adjusting means and the second adjusting means is configured so that the cutting edge position of the cutting insert can be adjusted with a second accuracy different from the first accuracy. Preferably, the first adjustment means and the second adjustment means have different amounts of adjustment of the cutting edge position of the cutting insert with respect to a predetermined operation amount.

Preferably, one of the first adjusting means and the second adjusting means includes a wedge-shaped member, and the other of the first adjusting means and the second adjusting means includes a screw member. Note that the first adjustment unit and the second adjustment unit may be configured independently.

The present invention also resides in a cutting tool to which the blade edge adjusting mechanism as described above is applied. Furthermore, the present invention resides in at least one of the first adjusting means, the second adjusting means, and the cartridge of the blade edge adjusting mechanism as described above.

The perspective view of the rotary cutting tool provided with the blade edge | tip adjustment mechanism which concerns on one Embodiment of this invention is shown. The front view of the cutting tool of FIG. 1 is shown. The bottom view of the cutting tool of FIG. 1 is shown. The perspective view of the tool body in the cutting tool of FIG. 1 is shown. The front view of the tool body of FIG. 4 is shown. The bottom view of the tool body of FIG. 4 is shown. The perspective view of the cartridge of the blade edge | tip adjustment mechanism in the cutting tool of FIG. 1 is shown. FIG. 8 is a plan view of the cartridge of FIG. 7. FIG. 8 shows a front view of the cartridge of FIG. 7. FIG. 8 shows a bottom view of the cartridge of FIG. 7. FIG. 8 shows a left side view of the cartridge of FIG. 7. FIG. 8 shows a right side view of the cartridge of FIG. 7. The perspective view of the adjustment wedge of the blade edge | tip adjustment mechanism in the cutting tool of FIG. 1 is shown. FIG. 10 shows a plan view of the adjustment wedge of FIG. 9. FIG. 10 shows a front view of the adjustment wedge of FIG. 9. FIG. 10 shows a left side view of the adjustment wedge of FIG. 9. The perspective view of the adjustment screw of the blade edge | tip adjustment mechanism in the cutting tool of FIG. 1 is shown. FIG. 12 shows a front view of the adjustment wedge of FIG. 11. FIG. 12 shows a bottom view of the adjustment wedge of FIG. 11. The perspective view of the cutting insert in the cutting tool of FIG. 1 is shown. The top view of the cutting insert of FIG. 13 is shown. The front view of the cutting insert of FIG. 13 is shown. The bottom view of the cutting insert of FIG. 13 is shown. The left view of the cutting insert of FIG. 13 is shown. The right view of the cutting insert of FIG. 13 is shown. The state as an example of the assembly by which the cutting insert of FIG. 13 and the adjustment screw of FIG. 11 are arrange | positioned at the cartridge of FIG. 7 is shown. Fig. 16 shows a plan view of the assembly of Fig. 15; Fig. 16 shows a front view of the assembly of Fig. 15; FIG. 16 shows a bottom view of the assembly of FIG. Fig. 16 shows a left side view of the assembly of Fig. 15; Fig. 16 shows a right side view of the assembly of Fig. 15;

Hereinafter, a blade edge adjusting mechanism according to an embodiment of the present invention will be described in detail with reference to the drawings. In the following description, terms such as “upper”, “lower”, “front”, and “rear” are used, but these are merely used to facilitate understanding and limit the present invention. Not intended.

The cutting edge adjusting mechanism 1 of the present embodiment is applied to a face mill T that is a rotary cutting tool that is used by being rotated in a rotation direction R around a rotation axis A. The rotation axis A coincides with the central axis of the mounting hole 2a of the tool body 2 of the milling machine T for attaching to the main shaft (not shown) of a milling machine as a machine tool, and from the front end side to the rear end side of the tool body 2 It extends to. A plurality of cutting inserts 4 are detachably attached to the tool body 2 via a plurality of cartridges 3. The blade edge adjusting mechanism 1 includes two types of blade edge position adjusting members (means) for adjusting the blade edge position of the cutting insert 4. The blade edge adjusting mechanism 1 is directly applied to an adjusting wedge (first adjusting means) 5 that can act on a cartridge 3 that is detachably provided on the tool body 2 and a cutting insert 4 that is detachably disposed on the cartridge 3. And an adjusting screw (second adjusting means) 6 that can act in an automatic manner. As shown in FIGS. 1 and 2, the cartridge 3 is fixed to the tool body 2 by a fixing screw 7 and a cartridge fixing wedge 8. Further, as shown in FIGS. 1 to 3, the cutting insert 4 is fixed on the cartridge 3 by a cutting insert fixing wedge 9. The fixing mechanism of the cartridge 3 using the wedge 8 and the fixing mechanism of the cutting insert 4 using the wedge 9 will not be described in detail below. Those skilled in the art will readily understand from the fixing mechanism of the cutting insert using the.

As shown in FIGS. 4 to 6, the tool body 2 has a substantially disc shape (or a substantially cylindrical shape), and an outer peripheral portion 2 b of the tool body 2 and A plurality of chip pockets 10 and a cartridge mounting seat 11 are provided so as to open to the front end surface 2c. The chip pocket 10 and the cartridge mounting seat 11 are configured in pairs, and the cartridge mounting seat 11 is positioned on the rear side of the chip pocket 10 in the tool rotation direction R. Each of these cartridge mounting seats 11 has a bottom wall surface 12 that substantially faces the radially outer peripheral side of the tool body 2 and a side wall surface 13 that intersects this and substantially faces the front side in the rotational direction R. is doing. Each of the bottom wall surface 12 and the side wall surface 13 is provided in parallel with the adjustment direction X (FIGS. 2 and 5). Here, each of the bottom wall surface 12 and the side wall surface 13 is configured so as not to prevent the sliding of the cartridge 3 along them, and is a flat surface here, but is not limited thereto. The bottom wall surface 12 is formed with a screw hole 14 into which a screw 7 can be screwed in order to fix the cartridge 3 to the tool body 2.

The adjustment direction X is generally a direction (including the reverse direction) extending from the front end side to the rear end side of the tool body 2, but is inclined with respect to the axis A. When the cutting insert 4 is moved toward the tip end side of the tool body 2 along the adjustment direction X, the adjustment direction X is closer to the outer peripheral side in the radial direction of the tool body 2 and the front side in the rotation direction R toward the tip end side of the tool body 2. Is defined as a predetermined direction in which the cutting edge (cutting edge) of the cutting insert 4 is displaced. In the milling machine T of the present embodiment, the adjustment direction X is determined in this way, but is not limited to this and can be variously changed.

Further, a mounting seat 15 for the cartridge fixing wedge 8 and a mounting seat 16 for the cutting insert fixing wedge 9 are provided on the front side of the cartridge mounting seat 11 in the rotation direction R, respectively. Screw holes 17 and 18 for fixing the wedge 8 and the wedge 9 are formed in the bottom wall surfaces of the mounting

seats

15 and 16, respectively. However, the screw hole 17 of the mounting seat 15 is formed to be twisted in the opposite direction to the screw hole of the wedge 8 which is a wedge member. Further, the screw hole 18 of the mounting seat 16 is formed to be twisted in the opposite direction to the screw hole of the wedge 9 which is a wedge member.

Further, on the rear end side (base end side) of the tool body 2 of the cartridge mounting seat 11, a mounting seat 19 for mounting the adjusting wedge 5 as the first adjusting means is provided. The mounting seat 19 has three side wall surfaces including a rear end side wall surface 19a, and a bottom wall surface 19b extending perpendicular to the side wall surface 19a. A screw hole 20 for fixing the adjustment wedge 5 is formed in the bottom wall surface 19 b of the mounting seat 19. The mounting seat 19 communicates with the cartridge mounting seat 11 so as to define a substantially integral space.

As shown in FIGS. 7 to 8E, the cartridge 3 which is an insert housing member mainly includes an upper surface 21, a lower surface 22, and a peripheral side surface 23 connecting them, and has a substantially rectangular parallelepiped shape. . The upper surface 21 and the lower surface 22 are formed substantially in parallel. The upper surface 21 is a surface exposed to the outer peripheral side of the tool body 2 when the cartridge 3 is disposed on the tool body 2. The lower surface 22 is a surface that becomes a seating surface when the cartridge 3 is disposed on the tool body 2. The peripheral side surface 23 includes two opposing

side surfaces

23a and 23b and two

side surfaces

23c and 23d therebetween. The two opposing

surfaces

23a and 23b are a first side surface 23a and a second side surface 23b, and are substantially parallel to each other. Each of the two

surfaces

23a and 23b extends in the longitudinal direction 3A of the cartridge 3 and extends between the upper and

lower surfaces

21 and 22, and is substantially perpendicular to the upper and

lower surfaces

21 and 22. The first side surface 23 a is positioned so as to face the front side in the rotation direction R when the cartridge 3 is disposed on the tool body 2. The second side surface 23b becomes a seating surface when the cartridge 3 is disposed on the tool body 2, and is positioned to face the rear side in the rotation direction R. The third side surface 23c of one of the two

side surfaces

23c and 23d can be referred to as the front surface because it is positioned so as to face the tip side of the tool body 2 when the cartridge 3 is disposed on the tool body 2. Since the fourth side surface 23d is positioned to face the rear end side of the tool body 2 when the cartridge 3 is disposed on the tool body 2, it can be referred to as a rear surface.

An insert seat 24 for mounting the cutting insert 4 is formed in the cartridge 3 so as to cut out a part of the intersection between the upper surface 21 and the peripheral side surface 23. The insert seat 24 is formed so as to open on each of the upper surface 21, the first side surface 23a, and the front surface 23c. The insert seat 24 includes a substantially rectangular seat bottom surface 25 provided substantially parallel to the lower surface 22 and two seat side surfaces 26a and 26b. Along with the lower surface 22 and the second side surface 23b, each of the seat bottom surface 25 and the second seat side surface 26b is configured not to prevent sliding along the surface, and is a plane here, but is not limited thereto. The first and second seat side surfaces 26 a, 26 b extend so as to stand upright from the seat bottom surface 25, and in particular, one second seat side surface 26 b extends here so as to be substantially perpendicular to the seat bottom surface 25. The first seat side surface 26a extends so as to intersect the longitudinal direction 3A, and the second seat side surface 26b extends substantially parallel to the longitudinal direction 3A. The first seat side surface 26a connected to the short side of the substantially rectangular seat bottom surface 25 is provided with a screw hole 27 into which the adjusting screw 6 as the second adjusting means is screwed. The screw hole 27 is formed so as to extend in the longitudinal direction 3 </ b> A of the cartridge 3.

Also, the cartridge 3 is provided with an attachment hole 28 for inserting a fixing screw 7 for fixing the cartridge 3 to the tool body 2 so that each of the upper surface 21 and the lower surface 22 has an opening. The axis of the mounting hole 28 extends at right angles to the longitudinal direction 3A, but is not limited thereto. The mounting hole 28 is formed away from the insert seat 24, and is located on the substantially opposite side in the longitudinal direction 3 </ b> A to the (use) cutting edge of the cutting insert 4 when the cutting insert 4 is disposed in the insert seat 24. In this way, the cartridge 3 is positioned.

Further, the portion of the rear surface 23d of the peripheral side surface 23 opposite to the longitudinal direction of the cartridge 3 from the side where the insert seat 24 is provided is directly connected to the upper surface 21 and has an obtuse inner angle α with respect to the upper surface 21. Intersecting inclined portions 29 are formed (see FIG. 8B). The inner angle α may be defined on a plane parallel to the two opposing

surfaces

23a and 23b. The inclined portion 29 is configured not to prevent the sliding of the adjusting wedge 5 here and is a flat surface here, but is not limited thereto.

The inclined portion 29 of the cartridge 3 engages with the adjusting wedge 5 as the first adjusting means, as will be apparent from the description to be described later, and the position of the cartridge 3 on the cartridge mounting seat 11 is changed according to the position of the wedge 5. It is shaped to vary in the longitudinal direction 3A. Such a cartridge 3 is configured to be arranged on the tool body so that the longitudinal direction 3A thereof is aligned with or aligned with the adjustment direction X (that is, in parallel), and the adjustment direction X 1 is slidable within a predetermined range on the cartridge mounting seat 11. The mounting hole 28 has a substantially circular shape extending in the longitudinal direction 3A of the cartridge on a surface orthogonal to the axis so that the position of the cartridge 3 can be changed (see FIGS. 8A and 8C). The degree of expansion of the mounting hole 28 in the longitudinal direction is set in consideration of the influence of the adjustment wedge 5 on the cartridge 3.

As shown in FIGS. 9 to 10C, the adjustment wedge 5 as the first adjustment means has a substantially cubic shape substantially composed of an upper surface 30, a lower surface 31, and a peripheral side surface 32 connecting them. Block-shaped) wedge-shaped member. Therefore, the peripheral side surface 32 substantially consists of four

side surfaces

32a, 32b, 32c, and 32d. The adjustment wedge 5 has a shape such that the width in a side view gradually decreases from the upper surface 30 toward the lower surface 31 (see FIG. 10C). However, the three

side surfaces

32 a, 32 c, and 32 d of the peripheral side surface 32 are formed so as to intersect the upper surface 30 and the lower surface 31 at substantially right angles. Only one of the four side surfaces 32b intersects the upper surface 30 at an acute angle of an angle β (≈180 ° −α) and intersects the lower surface 31 at an obtuse angle in the side view of FIG. 10C. It has an inclined side. The angle β may be determined on a surface parallel to the two

side surfaces

32c and 32d connected to both sides of the side surface 32b. The side surface 32b is configured such that the adjustment wedge 5 is slidable on the inclined portion 29 of the cartridge 3 and is flat here, but is not limited thereto. In addition, the adjustment wedge 5 is formed with a screw hole 33 into which an attachment screw 5 a for fixing the adjustment wedge 5 to the tool body 2 can be screwed so as to have an opening on each of the upper surface 30 and the lower surface 31. The screw hole 33 of the adjustment wedge 5 is formed to be twisted in the opposite direction to the screw hole 20 of the mounting seat 19, and is formed so as to be coaxial with the screw hole 20 when the adjustment wedge 5 is in the mounting seat 19. Has been. Therefore, the interval between the wedge 5 and the bottom wall surface 19b of the mounting seat 19 can be narrowed by rotating the mounting screw 5a in the first direction around the axis, and in some cases, they can be brought into contact with each other. . The interval between the wedge 5 and the bottom wall surface 19b of the mounting seat 19 can be increased by rotating the mounting screw 5a around the axis in the second direction opposite to the first direction. For example, the wedge 5 is removed from the mounting seat 19 be able to. Thus, the wedge 5 is configured to be movable back and forth in the axial direction of the screw hole 20 in the mounting seat 19, and the same applies to the

wedges

8 and 9.

As shown in FIGS. 11 to 12B, the adjusting screw 6 as the second adjusting means includes a rod-shaped body portion 34 having a thread and a head portion provided at one end of the body portion 34. 35, and is configured as a screw member. The head portion 35 has a substantially cylindrical shape, and two through holes 37 are formed in the head portion 35 so as to intersect with a central axis 6 </ b> A extending in the longitudinal direction of the adjusting screw 6. Each of the through holes 37 is formed to extend in a direction perpendicular to the central axis 6 </ b> A so as to have an opening on the peripheral side surface 36 of the head 35. Here, the two through holes 37 are formed so that their axes are orthogonal to each other, but their axes need not be orthogonal. Therefore, although not shown, the left and right side views of the adjusting screw 6 are the same as those in FIG. 12A. One or three or more through holes 37 may be provided. These through holes 37 are holes for inserting means such as a wrench to rotate the adjusting screw 6 around the central axis 6A. The through hole 37 may not be provided, and in this case, the head 35 can be configured to be operable with various tools. For example, the head portion 35 can be provided with a concave portion or a convex portion with which a tool can be engaged, or can be formed such that its shape in a cross section orthogonal to the central axis 6A is a substantially polygonal shape. . The diameter and length of the adjusting screw 6 can be appropriately set according to the size of the tool body 2, the cutting insert 4 and / or the cartridge 3, etc. It is.

The cutting insert 4 has a substantially rectangular flat plate shape as shown in FIGS. 13 to 14E, and a cutting edge 38 is provided on the side ridge. In addition, the range, length, and shape with respect to the insert 4 of the cutting blade 38 are not limited to what is shown in FIG. Further, the cutting edge 38 portion of the cutting insert 4 is at least made of a hard material such as cemented carbide, cermet, ceramic, or an ultra-high pressure sintered body containing diamond or cubic boron nitride, or those coated hard materials. It ’s good.

The cutting insert 4 has only one cutting edge 38 as can be understood from the drawing. The cutting insert 4 is not limited to having only one cutting edge 38, and may include a plurality of cutting edges and be configured to be indexable. However, in the case where a plurality of cutting edges are provided, the cutting insert may be configured to include a surface portion that can be pressed (contacted) by the adjusting screw 6 as the second adjusting means for each cutting edge. Further, when the cutting insert includes a plurality of cutting edges, it is preferable that the insert seat of the cartridge 3 is provided with a thinning portion so as to avoid collision or contact between the cutting edge not used and the insert seat.

The cutting insert 4 has a lower surface 39 for contacting the seat bottom 25 of the insert seat 24 of the cartridge 3, a rear surface 40 extending so as to stand upright from the lower surface 39, and a first surface 41 pressed by the cutting insert fixing wedge 9. And a second surface 42 on the back side of the first surface 41. When the first surface 41 and the second surface 42 are two opposing end surfaces, a peripheral side surface 43 extends between them. The peripheral side surface 43 includes a lower surface 39 and a rear surface 40. The lower surface 39 and the second surface 42 serve as a seating surface for the insert seat 24. The lower surface 39 and the second surface 42 are preferably configured so that the cutting insert 4 can slide on the cartridge 3 and are flat here, but are not limited thereto. The cutting edge 38 is formed at the edge of the first surface 41 (that is, the intersecting ridge line portion between the first surface 41 and the peripheral side surface 43). The cutting edge 38 is separated from the lower surface 39 and the rear surface 40. The first surface 41 can function as a rake surface. Here, the peripheral side surface 43 is formed so that the clearance angle becomes positive with respect to the cutting edge 38.

Next, an example of assembly of the blade edge adjusting mechanism 1 will be described.

As apparent from FIG. 1, the cartridge 3 is such that the bottom wall surface 12 and the side wall surface 13 of the cartridge mounting seat 11 and the lower surface 22 and the second side surface 23 b of the cartridge 3 abut against the tool body 2. Installed. At this time, the cartridge 3 is arranged so that the inclined portion 29 of the cartridge 3 is directed toward the proximal end side or the rear end side of the tool body 2 and the insert seat 24 is directed toward the distal end side of the tool body 2. Then, the adjustment wedge 5 is inserted into the mounting seat 19 (that is, the recess) on the rear end side of the inclined portion 29 of the cartridge 3. The adjusting wedge 5 is fixed (attached) to the tool body 2 by means of an attaching screw 5a. Each of the mounting screws 5 a includes male screw portions that are screwed into the screw holes 33 of the adjusting wedge 5 and the screw holes 20 of the mounting seat 19 at both ends. At this time, the side surface 32a of the adjustment wedge 5a (the side surface opposite to the inclined side surface 32b (rear surface)) is in contact with the side wall surface 19a on the rear end side of the mounting seat 19, while the adjustment wedge 5 is inclined. The side surface (front surface) 32 b contacts the inclined portion 29 of the cartridge 3. In this state, the fixing screw 7 is tightened, and the cartridge 3 is fixed to the tool body 2.

Then, a cartridge fixing wedge 8 is inserted in front of the cartridge 3 in the tool rotation direction R. The wedge 8 has a shape that gradually decreases toward the back side (not shown in FIGS. 1 to 3). By rotating the screw 8 a with respect to the wedge 8 and the mounting seat 15, the wedge 8 can be advanced to the back of the mounting seat 15. As a result, of the peripheral side surface 23 of the cartridge 3, the portion of the first side surface 23 a between the insert seat 24 and the inclined portion 29 is pressed by the clamp surface of the wedge 8, and the cartridge 3 is securely fixed by the tool body 2. The However, the screw 8a is provided with a male screw part which is screwed into the screw hole 8b of the wedge 8 and the screw hole 17 of the mounting seat 15 at both ends. However, the cartridge 3 does not necessarily have to be fixed using the cartridge fixing wedge 8 as in this embodiment. That is, a configuration in which the cartridge 3 is fixed only by the fixing screw 7 is also possible.

On the other hand, as shown in FIGS. 15 to 16E, the adjusting screw 6 as the second adjusting means is screwed into the screw hole 27 provided in the first seat side surface 26a of the insert seat 24 of the cartridge 3. Is done. Then, the cutting insert 4 is positioned on the insert seat 24 so as to abut against the top surface (or tip surface) 35 a of the head 35 of the adjustment screw 6. At this time, the cutting insert 4 is arranged so that the cutting edge 38 protrudes in the longitudinal direction 3A from the open end of the insert seat 24 of the cartridge 3 so that the cutting edge 38 can participate in cutting.

A cutting insert fixing wedge 9 is inserted between the cutting insert 4 and the tool body 2. As shown in FIG. 3, the wedge 9 has a shape that gradually decreases toward the back side. By rotating the screw 9 a with respect to the wedge 9 and the mounting seat 16, the wedge 9 can be advanced to the back of the mounting seat 16. As a result, the first surface 41 of the cutting insert 4 is pressed by the clamping surface of the wedge 9, and the cutting insert 4 on the cartridge 3 is securely fixed to the insert seat 24 (see FIGS. 1, 3 and 15). However, the screw 9a is provided with a male screw portion that is screwed into the screw hole 9b of the wedge 9 and the screw hole 18 of the mounting seat 16 at both ends.

Next, the operation and effect of the blade edge adjusting mechanism 1 of this embodiment will be described.

In the blade edge adjusting mechanism 1 of this embodiment, the screw 5a is turned so as to push in the adjusting wedge 5 as the first adjusting means or the adjusting wedge 5 is lifted away from the bottom wall surface 19b of the mounting seat 19. By rotating in the reverse direction, the cartridge 3 can be moved along the adjustment direction X (that is, the longitudinal direction of the bottom wall surface 12 of the cartridge mounting seat 11). When the cutting edge position of the cutting insert 4 is adjusted by the action of the wedge 5, the wedge 8 and the wedge 9 are left loosened, but it is not necessary to completely loosen the fixing screw 7 of the cartridge 3. When the protruding amount of the cutting edge 38 of the cutting insert 4 is increased (by moving the cutting insert 4 downward in FIG. 2), the cartridge 3 can be automatically moved by the adjusting wedge 5. When the amount of protrusion of the cutting edge 38 of the cutting insert 4 is reduced (by moving the cutting insert 4 upward in FIG. 2), the adjustment wedge 5 is moved away from the bottom wall surface 19b, and the cartridge 3 can be moved by hand. .

Since the inclination angle β of the side surface 32b by the adjustment wedge 5 is an acute angle but relatively close to 90 °, for example, by pressing the adjustment wedge 5 with the fixing screw 7 screwed into the screw hole 14 to some extent, The position of the cartridge 3, that is, the blade edge position can be adjusted with high accuracy. When the position of the cartridge 3 with respect to the tool body 2 can be determined, the fixing screw 7 is completely tightened. At the same time, the wedge 8 and the wedge 9 are firmly tightened. Thereby, the cartridge 3 and the cutting insert 4 are fixed securely. If the cartridge fixing wedge 8 is not used, the step of tightening the wedge 8 is omitted. The cartridge 3 can be sufficiently fixed with only the fixing screw 7 without using the wedge 8. In this way, the adjustment wedge 5 as the first adjustment means can adjust the position of the cartridge 3 with high accuracy, so that the cutting edge position of the cutting insert 4 can be finely adjusted. As described above, the adjustment wedge 5 as the first adjustment means is capable of adjusting a minute blade edge position (for example, adjusting a blade edge position of 0.1 mm or less) to cope with a manufacturing dimensional error. One adjusting mechanism is configured together with the cartridge mounting seat 11, the cartridge 3 and the mounting seat 19.

Furthermore, in the blade edge adjusting mechanism 1 of the present embodiment, the cutting insert 4 is directly moved along the adjusting direction X by turning the adjusting screw 6 as the second adjusting means clockwise or counterclockwise. Make it possible. When the cutting edge position of the cutting insert 4 is adjusted by the action of the adjusting screw 6, for example, the wedge 9 is held in a loose state. When the protruding amount of the cutting edge 38 of the cutting insert 4 is increased (by moving the cutting insert 4 downward in FIG. 2), the cutting insert 4 can be directly and automatically moved by the adjusting screw 6. When the amount of protrusion of the cutting edge 38 of the cutting insert 4 is reduced (by moving the cutting insert 4 upward in FIG. 2), the adjusting screw 6 is advanced into the screw hole 27, and the cutting insert 4 is directly Can be moved by hand.

More specifically, the protruding position of the head 35 from the side surface 26a of the insert seat 24 is changed by turning the adjusting screw 6 clockwise or counterclockwise. Since the cutting insert 4 is positioned by abutting against the top surface of the head 35, the position of the cutting edge 38 on the cartridge 3 is adjusted according to the protruding position of the head 35. The adjustment direction of the cutting insert 4 using the adjustment screw 6 at this time is the same direction as the adjustment direction X of the cartridge 3 described above, but may be slightly different (may be substantially the same direction).

In this adjusting screw 6, the position of the cutting insert 4 can be directly adjusted according to the screw pitch by adjusting the screwing amount into the screw hole 27 of the body part 34 which is a screw part. Therefore, the adjustment screw 6 is suitable for making the adjustment width of the blade edge position large and rough, and is generally not suitable for high-precision adjustment as compared with the adjustment wedge 5 which is the first adjustment means. However, since the head 35 can be moved by the length of the body portion 34 of the adjustment screw 6, the position of the cutting edge 38 of the cutting insert 4 according to the adjustment screw 6 compared to the adjustment wedge 5. The amount of adjustment can be greatly increased. Thus, the adjustment screw 6 as the second adjustment means can adjust a large blade edge position (for example, adjustment of the blade edge position exceeding 0.1 mm, particularly exceeding 0.2 mm) to cope with re-grinding. The second adjusting mechanism is configured together with the cartridge 3.

As described above, in the blade edge adjusting mechanism 1 of the present embodiment, the adjustment edge 5 as the first adjustment means can be used to adjust the position of the blade edge with high accuracy and as the second adjustment means. It is also possible to perform rough and significant adjustment of the cutting edge position with the adjusting screw 6. That is, first, the blade position is roughly adjusted by the second adjusting means 6, and then the highly accurate edge position is adjusted by the first adjusting means 5. It is also possible to cope with a cutting insert whose position is retracted. Therefore, by applying the blade edge adjusting mechanism 1 to each of the plurality of cutting inserts 4 in the milling cutter, the blade edge positions of the plurality of cutting inserts 4 can be adjusted more suitably. The adjustment of the blade edge position by the adjustment wedge 5 is not limited to the procedure shown here, and can be performed by various procedures. The same applies to the adjustment of the blade edge position by the adjusting screw 6.

In the blade edge adjusting mechanism 1 of the present embodiment, the first adjusting means is the adjusting wedge 5 that performs high-precision adjustment, and the second adjusting means is the adjusting screw 6 that performs rough adjustment. However, the present invention is not limited to this. . The adjustment wedge 5 as the first adjustment means can be a rough adjustment member, and the adjustment screw 6 as the second adjustment means can be a high-precision adjustment member. When one of the first adjusting means and the second adjusting means can adjust the cutting edge position of the cutting insert with the first accuracy, the other of them adjusts the cutting edge position of the cutting insert with a second accuracy different from the first accuracy. It should be adjustable. By these, it is good that the adjustment amount or adjustment width of the cutting edge position of the cutting insert is enlarged and the fine adjustment is possible. However, the 1st precision and 2nd precision here represent the sensitivity of the blade-tip position with respect to a predetermined operation amount. For example, when the predetermined operation amount is one screw rotation, the first adjustment amount of the cutting edge position of the cutting insert with respect to one rotation of the screw 5 a for fixing the adjustment wedge 5 is related to the first accuracy. The second adjustment amount of the cutting edge position of the cutting insert with respect to one rotation is related to the second accuracy. In this case, the first adjustment amount may be different from the second adjustment amount. Moreover, although the two adjustment means may be comprised independently like the said blade edge | tip adjustment mechanism 1, it may not be so. Further, each adjusting means is not limited to being a wedge member or a screw member, and may have any other appropriate configuration.

Furthermore, in the present embodiment, the first adjusting means acts on the cartridge 3 and can indirectly act (for example, move) on the cutting insert 4. However, the present invention is not limited to this, and both the first and second adjusting means 5 and 6 may be configured to directly act on the cutting insert 4. Alternatively, both the first and second adjusting means 5 and 6 may be configured to be able to act indirectly on the cutting insert 4. For example, the adjustment screw 6 is screwed into a screw hole (preferably this hole extends parallel to the adjustment direction X) newly provided in the rear end side wall portion of the mounting seat 19, and is attached to the adjustment wedge 5. It may act. In the present invention, regardless of whether each of the two adjusting means 5 and 6 can directly act on the cutting insert or indirectly, the cutting edge position of the cutting insert can be set in substantially the same direction, preferably May be configured to be adjustable in the same direction.

However, the present invention is not limited to the above embodiment in which the cutting edge position of the cutting insert can be adjusted in substantially the same direction (preferably in the same direction) by the action of the two adjusting means. The present invention provides various other types in which one of the first and second adjusting means can move the cutting edge position of the cutting insert in a direction including a component of the adjustment direction of the cutting edge position of the cutting insert by the other. Variations are allowed. That is, when the cutting edge of the cutting insert can be moved in the first direction by the action of one of the two adjusting means, the cutting edge of the cutting insert is moved in the second direction by the other action of them, Various modes in which the cutting edge is moved in one direction are allowed in the present invention. In the blade edge adjusting mechanism 1 of the above-described embodiment, the first direction and the second direction are substantially coincident or coincident with each other. Thus, the present invention is directed to the ability to adjust the position of the blade edge in one predetermined direction by the action of each of the two adjusting means (adjusting members). Further, the adjustment screw 6 and the adjustment wedge 5 may be displayed with a standard scale according to the adjustment amount.

Moreover, in the said embodiment, the adjustment wedge 5 has the screw hole 33 there, The screw 5a which has two male screws which can engage with both this screw hole 33 and the screw hole 20 of a mounting seat in both ends. Fixed by. However, the method of fixing the adjusting wedge 5 is not limited to such a method. For example, the screw hole 33 of the adjustment wedge 5 can be changed to a through hole having no thread. In this case, the through hole of the adjustment wedge 5 may have an annular step portion in the middle of the hole, as in the mounting hole 28 of the cartridge 3 (see FIGS. 8A and 8C). This step can provide a surface against which the head of the screw can abut when the screw is screwed into the screw hole 20 of the mounting seat. As described herein, the fixing method of the cartridge fixing wedge 8 and the fixing method of the cutting insert fixing wedge 9 can be changed in the same manner as the adjusting wedge 5 fixing method.

The cutting edge adjusting mechanism 1 of the present invention is not limited to the cutting edge exchange type rotary cutting tool, but can be applied to various other cutting tools that require the cutting edge position to be adjusted. In a cutting tool provided with only a single cutting edge, the blade edge adjusting mechanism of the present invention may be applied. For example, the present invention may be applied for adjusting the cutting edge position of a lathe tool.

The representative embodiment of the present invention has been described above, but the present invention is not limited to this embodiment. Various changes and modifications can be made to the present invention, and various substitutions and modifications can be made without departing from the spirit and scope of the present invention as defined by the appended claims.

Claims

A blade edge adjusting mechanism for adjusting a blade edge position of a cutting insert (4) removably attached to a tool body (2) of a cutting tool,
First adjusting means (5) configured to adjust the cutting edge position of the cutting insert;
Second adjusting means (6) configured to adjust the cutting edge position of the cutting insert, the second adjusting means being the cutting insert (4) by the first adjusting means (5). A blade edge adjustment mechanism (1), comprising: a second adjustment means configured to be able to move the cutting insert (4) in a direction including a component in the adjustment direction of the blade edge position.
The second adjusting means (6) can move the cutting insert (4) in substantially the same direction as the adjusting direction of the cutting edge position of the cutting insert (4) by the first adjusting means (5). The blade edge adjusting mechanism (1) according to claim 1, configured as described above.
A cartridge (3) detachably mounted on the tool body (2), further comprising a cartridge (3) on which the cutting insert is disposed;
The first adjusting means (5) is provided between the tool body (2) and the cartridge (3), and acts on the cutting insert via the cartridge,
The second adjusting means (6) is provided between the cartridge (3) and the cutting insert (4) and acts directly on the cutting insert.
The blade edge adjusting mechanism (1) according to claim 1 or 2.
One of the first adjusting means (5) and the second adjusting means (6) is configured such that the cutting edge position of the cutting insert (4) can be adjusted with a first accuracy, The other of the first adjusting means (5) and the second adjusting means (6) can adjust the cutting edge position of the cutting insert (4) with a second accuracy different from the first accuracy. The blade edge adjusting mechanism (1) according to any one of claims 1 to 3, wherein the blade edge adjusting mechanism (1) is configured.
The adjustment amount of the cutting edge position of the cutting insert (4) with respect to a predetermined operation amount differs between the first adjustment means (5) and the second adjustment means (6). The blade edge adjusting mechanism (1) according to claim 1.
One of the first adjusting means (5) and the second adjusting means (6) includes a wedge-shaped member, and the first adjusting means (5) and the second adjusting means (6). The blade edge adjusting mechanism (1) according to any one of claims 1 to 5, wherein the other includes a screw member.
The blade edge adjusting mechanism (1) according to any one of claims 1 to 6, wherein the first adjusting means (5) and the second adjusting means (6) are configured independently.
A cutting tool to which the blade edge adjusting mechanism according to any one of claims 1 to 7 is applied.
The first adjusting means (5) of the blade edge adjusting mechanism according to any one of claims 1 to 7.
The second adjusting means (6) of the blade edge adjusting mechanism according to any one of claims 1 to 7.
A cartridge (3) of the blade edge adjusting mechanism according to claim 3.