JP2001246515A - Throw-away type face milling cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adjust face deflection with high accuracy by pushing out a tip 5 to the tool front end side in a stable manner, in the case of a face milling cutter capable of adjusting the deflection of its face cutting edge by using an adjustment mechanism to press the tip 5, which is attached to a tool body 1 by being pressed by a clamp member, toward the tool front end side. SOLUTION: The tip 5 equipped with the face cutting edge is detachably attached, by means of a wedge 6, to a tip attaching seat 3 formed on the tool body 1 rotated around an axis, and the tip 5 is pressed toward the tool front end side by means of a wedge 8 to adjust the deflection of the cutting edge 12 to the front end side thereof. A spring plunger 21 is provided for pressing a surface of the wedge 8 on the tool front end side, or a portion 8F on the opposite side of a portion 8B that presses the tip 5, toward the tool rear end side, thus preventing play of the wedge 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool body in which a throw-away tip (hereinafter referred to as a tip) having a front cutting edge is detachably attached to a tool body, and the tip end of the front cutting edge of the tip. The present invention relates to a throw-away type face mill (hereinafter, referred to as a face mill) provided with an adjustment mechanism for adjusting the run-out of the workpiece.

[0002]

2. Description of the Related Art In a face milling machine of this type, for example, a concave portion is formed on the outer periphery of a tip portion of a disk-shaped tool body, and a chip having a front cutting edge formed on one wall surface facing the circumferential direction of the concave portion. A chip member such as a cartridge having the tip mounted on the tip is seated directly or via a flat plate, and the space between the other wall surface of the concave portion and the side surface of the chip member facing the wall surface. There is known a device in which a clamp member such as a wedge is inserted into a hole to press and attach the chip member to the one wall surface. In such a face mill, an adjustment mechanism is provided for finely adjusting the amount of protrusion of each of the thus mounted tip members toward the tool tip side, that is, the front deflection of each of the cutting blades. Various things have been proposed.

As one of such adjusting mechanisms, another concave portion communicating with the concave portion is formed on the tool rear end side of the concave portion of the tool body, and the rear end surface of the tip member is formed in the other concave portion. And insert another wedge that can be in contact with the wall surface of the other concave part facing the tool tip side by screwing it in with a mounting screw, etc., and press the tip member against the tool tip side with the other wedge according to the screwing amount In this case, it is possible to adjust the run-out of the front cutting blade by protruding the cutting edge. As one of the other adjusting mechanisms, another concave portion is similarly formed on the tool rear end side of the concave portion, and the distal end is formed on the wall surface facing the tool distal end side of the other concave portion. An adjusting screw that can be brought into contact with the end face is screwed in along the axial direction of the tool body, and by rotating this adjusting screw to project toward the tool tip, the tip member is pressed against the tool tip as well. Some have been proposed to be issued.

[0004]

In the case where such a face mill is used to perform a more precise finish surface machining, more strict control of the run-out of the front cutting edge is required. An excessive load is applied to the wedge or the adjusting screw, which has a function of pressing the tip member toward the tool tip side to protrude, through the tip member at the time of run-out adjustment or at the time of machining. Therefore, if there is a slight error in the wedge or the adjusting screw, the wedge or the adjusting screw itself will rattle, and when the wedge or the adjusting screw rattles, the deflection of the front cutting edge will be strict. Management cannot be expected.

The present invention has been made under such a background, and a tip member, which is pressed by a clamp member and attached to a tool body, is pressed toward a tool tip side by an adjustment mechanism, so that a front cutting is performed. An object of the present invention is to provide a face mill capable of adjusting the contact of the blade with the tip member stably to the tip end side of the tool and performing highly accurate front deflection.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and to achieve such an object, the present invention provides a substantially disk-shaped tool body which is formed around the distal end of a tool body rotated about an axis. A tip member having a cutting front blade protruding toward the tool tip side is detachably mounted on the recess by pressing a seating surface of the tip member against a mounting seat surface provided on the recess side by a clamp member, and the tool body is mounted. In a throw-away type front milling machine provided with an adjusting mechanism for adjusting the deflection of the front cutting edge toward the tip by pressing the tip member toward the tool tip via a pressing member, It is characterized by having a prevention means for preventing rattling of the member. Therefore, although the pressing member of the adjusting mechanism receives a reaction force from the chip member during the run-out adjustment or during the processing, the pressing member itself is prevented from rattling by the prevention means. However, the pressing member does not rattle due to the processing reaction force. As a result, the deflection of the front cutting blade of the tip member can be accurately adjusted by the pressing member.

Various means can be adopted as the prevention means. The surface of the pressing member of the adjusting mechanism on the tool tip side, which is opposite to the portion for pressing the tip member, is disposed behind the tool. It is also possible to employ an urging means that presses toward the end. Here, usually, the pressing member of the adjusting mechanism is larger than the tip member, and when the tip member is pressed by the pressing member, it is pressed by a part of the pressing member. For this reason, the pressing member is in a state of one-sided contact, and receives a load at a position eccentric from the tip member to generate a moment. However, as described above, since the portion of the pressing member on the tool tip side opposite to the portion for pressing the tip member is pressed by the urging means, the tool tip surface of the pressing member is Both ends receive the reaction force from the tip member and the pressing force of the spring plunger, and no moment is generated.

The biasing means is constituted by a spring plunger, and the spring plunger is separated from the tip member at an angle to the tip member at an angle to the tip member when viewed from the outer peripheral side of the tool body. If disposed at an angle with respect to the member, the pressing member of the adjusting mechanism by the pressing force of the spring plunger, for example, a wedge member housed on the mutually intersecting wall surface,
It can be pressed against both walls. That is, a pressing member such as a wedge member can be pressed against the corners of both wall surfaces that intersect with each other, thereby further preventing rattling of the pressing member. Furthermore, if the spring plunger is arranged in parallel with the tip member as viewed from the outer peripheral side of the tool body, the surface of the pressing member on the tool tip side receives the same processing reaction force from the tip member and the pressing force of the spring plunger. In this case, the pressing force of the spring plunger for preventing the pressing member from rattling can be easily managed.

[0009]

1 to 4 show a first embodiment of the present invention.
1 shows an embodiment of the present invention. In the present embodiment, the tool body 1 has a truncated conical disk shape whose diameter is reduced toward the rear end side, and a mounting hole 1a is formed in the center portion along the axis O of the tool body 1. ing. An unillustrated mounting bolt is inserted into the mounting hole 1a, and the tip of the mounting bolt is screwed into the adapter, whereby the tool body 1 is mounted on the unillustrated adapter. The tool body is attached to the spindle head of the machine tool via an adapter, and is rotated in the tool rotation direction T. A plurality (eight in the present embodiment) of recesses are formed at equal intervals in the circumferential direction in the outer peripheral portion of the tip end of the tool main body 1. This recess is used for the tip pocket 2, ...
A tip mounting seat 3 formed on the rear side of the tip pockets 2 in the tool rotation direction T, and a tip pocket 2
And a first recess 4 formed between the chip mounting seats 3. A tip 5 as a tip member is attached to the tip mounting seat 3, a wedge 6 as a clamp member is attached to the first recess 4, and a tip main body portion of the tip 5 on the tool rear end side is provided. 2 recesses 7 are formed,
A wedge 8 as a shake adjusting mechanism is attached here.

The tip mounting seat 3 has a bottom surface 3A facing the tool rotation direction T and a wall surface 3B formed perpendicular to the bottom surface 3A and facing the outer periphery of the tool. The rear end side communicates with the second recess 7. The wall surface 3B is arranged such that the front cutting edge 12 of the chip 5 is located in a plane perpendicular to the axis O of the tool main body when the side surface, which is the slide surface of the chip 5, is brought into close contact with the wall surface 3B. In accordance with the inclination angle of the front cutting blade 12, it is formed so as to be inclined toward the outer peripheral side of the tool toward the tool tip side (see FIG. 1). Also, the center and the outer portion of the center of the wall surface 7A facing the tool tip side of the second recess 7 are formed on the outer side of the tool body 1 so as to form an obtuse angle with the wall surface 3B of the chip mounting seat 3. It is formed so as to be inclined toward the rear end of the tool as it goes.

As shown in FIG. 4, the chip 5 has a substantially flat chip body 10 made of a hard material such as cemented carbide and the like.
Approximately half of the tip side of A is the rake face 5Aa of the tip 5, and at one corner of the rake face 5Aa, a cutting edge tip 11 made of an ultra-hard sintered body mainly composed of diamond or CBN is provided. The rake face 5Aa is joined flush to the rake face 5Aa. A front cutting edge 12 is formed on one edge of the rake face 5Aa on the cutting edge tip 11 on the corner side. In addition, on the edge 11 of the rake face 5Aa, an outer peripheral edge is formed on the edge 11 in a direction orthogonal to the front edge 12 through a convex arc-shaped corner edge 13. A blade 14 is formed, and a portion of the chip 5 opposite to the outer peripheral cutting edge 14 across the front cutting edge 12 is retracted with respect to the front cutting edge 12. The side surface of the chip 5 opposite to the one side surface 5A is the seating surface 5B on the chip member side in the present embodiment.

The tip 5 thus configured is located between the one side face 5A and the seating face 5B and is provided with the outer peripheral cutting edge 1A.
The side face 5C located on the side opposite to the side 4 is brought into close contact with the wall surface 3B toward the tool inner peripheral side, and the second recess 7 is formed.
The seating surface 5B is accommodated in the chip mounting seat 3 so as to be opposed to the wall surface 3A, which is a mounting seat surface, and is spaced from the wall surface 7A of the chip mounting seat 3 in the direction of the axis O.
B is slidably mounted along the above inclination. In this mounting state, the rake face 5Aa of the tip 5 is made parallel to the wall face 3A of the tip mounting seat 3, and is therefore inclined toward the tool rotation direction T toward the tool tip side, whereby the The front cutting edge 12 and the outer peripheral cutting edge 14 are given a positive axial rake angle.

In the state where the rake face 5Aa of the chip 5 is formed in the state where the rake face 5Aa of the tip 5 is mounted on the tip mounting seat 3, a portion (a tool rear end side) opposite to the rake face 5Aa of the one side face 5A includes: An inclined plane is formed gradually from the side surface 5C toward the outer peripheral cutting edge 14 toward the seating surface 5B. That is, in the mounting state, the inclined plane is inclined in the tool rotation direction T toward the inner circumferential side of the tool.

On the other hand, the tool rotation direction T of the first recess 4
The wall surface 4A facing the rear side of the chip mounting surface is formed so as to face the inclined plane of the chip 5 in the mounted state, and serves as a clamp surface parallel to the wall surface 3A of the chip mounting seat 3. Therefore, between the wall surface 4A serving as the clamp surface and the inclined plane of the one side surface 5A of the chip 5, a first gap portion gradually narrowing toward the tool inner peripheral side is formed. The wedge 6 as a clamp member is inserted into the first gap.

The wedge 6 has a pair of side surfaces 6 which can be in close contact with the inclined plane of one side surface 5A of the chip 5 and the side surface 4A serving as a clamp surface of the first concave portion 4 in the above mounted state.
A and 6B are formed in a block shape. Between the side surfaces 6A and 6B, the wedge 6 is perpendicular to the wall surface 3B of the chip mounting seat 3 in a state where the wedge 6 is inserted into the first gap. A clamp screw hole is provided so as to satisfy the following. On the other hand, the wall surface 4 on the back side of the first gap portion
In the D part, so as to be coaxial with the clamp screw hole,
A clamp screw hole is formed so as to be twisted in a direction opposite to the clamp screw hole. Into these clamp screw holes, clamp screws 16 each having a male screw portion screwed into the clamp screw hole at both ends are screwed.
Is pushed into the tool inner peripheral side, so that the tip 5 is pressed perpendicularly to the wall surface 3A of the tip mounting seat 3 via the inclined plane of one side surface 5A toward the tool rotation direction T rear side. It is made to be fixed to.

On the other hand, between the side face 5D facing the tool rear end side of the chip 5 fixed in this way and the wall surface 7A facing the tool tip side of the second recess 7, the same as the first gap is provided. 5D and the wall surface 7
A second gap portion in which the interval with A gradually narrows is defined,
The wedge 8 as an adjustment mechanism is inserted into the second gap. The wedge 8 is a wall 7 of the second recess 7.
A and a side surface 5D of the chip 5
Is a block-shaped member having a pressing surface 8Ba opposed to. The pressing surface 8Ba is a side surface 8 facing the tool tip side of the wedge 8.
B and a part of the pressed surface 8 of the side surface 8B.
The direction opposite to Ba, that is, the tool rotation direction T of the side surface 8B
The rear side portion of the front surface is cut off at a corner to form an inclined plane 8F. The inclined plane 8F is a portion to be a pressed portion pressed by a spring plunger 20 described later. In the wedge 8, between the side surfaces 8A and 8B,
In a state where the wedge 8 is inserted into the second gap,
An adjusting screw hole 8C is provided so as to be parallel to the inclined plane on the outer peripheral side of the wall surface 7A of the concave portion 7 of FIG. The other pair of side surfaces 8D and 8E of the wedge 8 located on the opposite side with the adjustment screw hole 8C therebetween are formed so as to be parallel to each other and orthogonal to the side surfaces 8A and 8B (see FIG. 3). ).

As shown in FIG. 1, an adjusting screw hole 7C that is twisted in the opposite direction to the adjusting screw hole 8C is coaxial with the adjusting screw hole 8C on the wall surface 7B on the inner side of the second recess 7. These adjusting screw holes 7C,
8C is screwed with an adjusting screw 17 having male screw portions 17A and 17B screwed into the adjusting screw holes 7C and 8C, respectively, formed at both ends. Further, a wall surface 7D facing the tool rotation direction T and a wall surface 7E facing rearward in the tool rotation direction T of the second recess 7 are formed in parallel to each other, and the wedge 8 is A pair of side surfaces 8D,
8E is slidably in contact with these wall surfaces 7D, 7E and inserted into the second gap.

Further, in the indexable type face milling machine of the first embodiment, the wedge 8 which is a pressing member of the adjusting mechanism for adjusting the deflection of the tip 5 toward the front end side of the front cutting edge 12 is used. Prevention means are provided to prevent this.
The prevention means comprises a spring plunger 20 which presses the inclined plane 8F formed in a part of the side surface 8B facing the tool tip side of the wedge 8 in the mounted state and on the rear side in the tool rotation direction T. ing. The spring plunger 20 is configured such that a pressing member such as a ball or a cylindrical member with a bottom is urged toward the distal end via a spring at the distal end of a plunger base having an external thread formed on the outer periphery. As shown in FIG. 2, a screw hole 21 is formed in the outer peripheral portion of the bottom surface of the tool main body 1, toward the rear end side of the tool, toward the tool rotation direction T and toward the outside of the tool main body 1. As shown in the figure, the tip 5 is formed so as to be inclined away from the tip 5 at an angle toward the tool tip when viewed from the outer peripheral side of the tool body 1. As shown in FIG. 3, the screw hole 21 has its tip directed to the intersection of the side walls 7A and 7E defining the second recess 7 as viewed from the outer peripheral side of the tool main body 1. Is formed. And this screw hole 2
1, the spring plunger 20 is screwed to an appropriate depth, and the pressing force of the spring plunger 20 to the wedge 8 can be adjusted by the amount of screwing.

Next, the operation of the throwaway type front slice having the above configuration will be described. In the face mill having the above-described configuration, in order to adjust the run-out by adjusting the position of the front cutting edge 12 of the tip 5 attached to each of the recesses 3 in the direction of the axis O, the adjustment screw 17 is rotated. The wedge 8 of the adjusting mechanism is pushed into the back of the second gap, that is, the inner peripheral side of the tool, whereby the side surface 5D of the chip 5 is pressed to protrude the chip 5 to the tool tip side, and all the chips 5. May be positioned on one plane orthogonal to the axis O. In this embodiment, the direction perpendicular to the bottom surface 3A of the tip mounting seat 3 and toward the rear side in the tool rotation direction T is the pressing direction of the tip 5 by the wedge 6 as a clamp member. The direction toward the tool tip side parallel to the mutually perpendicular wall surfaces 3A and 3B is a tip 5 formed by a wedge 8 as an adjustment mechanism.
In the pressing direction.

As described above, when the wedge 8 of the adjusting mechanism pushes the tip 5 toward the tool tip side, or when the workpiece is machined by the tip 5 thus projected, the wedge 8 is attached to the tip 5. A reaction force is received from the chip 5 via the pressing surface 8Ba in contact with the side surface 5D. here,
The wedge 8 is formed wider than the chip 5 in view of having the screw hole 8C inside, and the pressing surface 8Ba is biased to a position shifted from the center of the wedge 8, so that the pressing surface 8Ba When receiving a reaction force from the tip 5, a moment is generated in the wedge 8 as indicated by Z in FIG. However, since the wedge 8 is pressed by the spring plunger 20 on the side 8B on the tool tip side and on the opposite side to the pressing surface 8Ba, the pressing force of the spring plunger 20 reduces the reaction force of the tip 5. After all, no moment is generated in the wedge 8.
For this reason, even when a reaction force from the chip 5 is applied during run-out adjustment or processing, it is possible to reliably prevent the wedge 8 as a pressing member of the adjustment mechanism from rattling. As a result, the wedge 8 allows the deflection of the front cutting edge 12 of the tip 5 to be accurately adjusted.

In this embodiment, the screw holes 21 are
The spring plunger 20 is screwed into the screw hole 21 so that the spring plunger 20 is screwed into the screw hole 21 when viewed from the outer peripheral side of the tool main body 1 so as to be away from the chip 5 at an angle toward the tool tip side with respect to the tool tip. The pressing force of the spring plunger 20 is applied to the side surface 8A of the tip 5,
Acts obliquely on 8E. With this pressing force, the chip 5 is simultaneously pressed against both intersecting wall surfaces 7A and 7E which regulate the movement of the chip 5. As a result, rattling of the chip 5 can be further prevented.

In this embodiment, the wedge 8 is used as a pressing member of the adjusting mechanism for adjusting the deflection of the front cutting blade toward the tip end and pressing the chip 5, but the pressing member of the adjusting member is The screw member is not limited to the wedge. Also, a wedge 6 as a clamp member
The pressing direction by the wedge 8 as an adjustment mechanism is set to be a direction perpendicular to the wall surface 3A.
Although the direction perpendicular to the pressing direction of the wedge 6 is parallel to the wall surfaces 3A and 3B, the pressing direction by the clamp member or the adjusting mechanism is also oblique to the wall surface 3A or the wall surface 3D or strictly perpendicular to each other. The direction may be set to be oblique to some extent without being performed.

<Second Embodiment> FIGS. 5 to 7 show:
2 shows a second embodiment of the present invention. The second embodiment is different from the first embodiment in that a tip 30 having a front cutting edge 12 and a pressing member of an adjusting mechanism for adjusting the tip 30 of the front cutting edge to run out. Each shape of the wedge 40, the second recess 50 for accommodating the wedge 40
And the arrangement of the spring plunger 20 that presses the wedge 40. In the second embodiment, the chip 30, the wedge 40, the second recess 5
The configuration other than 0 and the arrangement of the spring plungers 20 is the same as that of the first embodiment, and therefore, the same reference numerals are assigned to common parts, and description thereof will be omitted.

In the second embodiment, the side surface 30 D of the tip 30 facing the tool tip is formed substantially parallel to the front cutting edge 12. The wall surface 50A of the second recess 50 facing the tool tip side is formed so as to be orthogonal to the wall surface 50B of the second recess 50 facing the tool outer peripheral side and the wall surface 50D of the second recess 50 facing the tool rotation direction T. ing. Then, between the side surface 30D of the tip 30 and the wall surface 50A facing the tool tip side of the second recess 50, the distance between the side surface 30D and the wall surface 50A becomes gradually narrower toward the tool inner peripheral side. A second gap portion is defined, and the wedge 40 is inserted into the second gap portion. The wedge 40 is a block having a side surface 40A facing the wall surface 50A of the second recess 50 and an inclined pressing surface 40Ba facing the side surface 30D of the chip 30. The inclined pressing surface 40Ba forms a part of the side surface 30B facing the tool tip side of the wedge 40, and a portion of the side surface 30B opposite to the inclined pressing surface 40Ba, that is, the rear side of the side surface 30B in the tool rotation direction T. Is a pressed surface 4 formed in parallel with the inclined pressing surface.
0F is formed. The inclined plane 40 </ b> F is a portion pressed by the spring plunger 20.

An adjusting screw hole 40C is formed in the wedge 40 so as to be parallel to the wall surface 50A of the second recess 50 when the wedge 40 is inserted into the second recess 50. I have. Also, the wall surface 5 on the back side of the second recess 50
0B, an adjustment screw hole 50C that is twisted in the opposite direction to the adjustment screw hole 40C is formed so as to be coaxial with the adjustment screw hole 40C, and these adjustment screw holes 40C and 50C are formed.
, An adjusting screw 51 having male screw portions screwed into the adjusting screw holes 40C and 50C, respectively, is formed at both ends.

As shown in FIG. 6, one end of the screw hole 60 into which the spring plunger 20 is screwed is provided on the outer periphery of the bottom surface of the tool body 1, and the screw hole 60 moves outward from the tool body 1 toward the rear end of the tool. As shown in FIG. 5, the tip 30 is viewed from the outer peripheral side of the tool body 1.
It is arranged so that it may become parallel. Further, as shown in FIG. 7, the screw hole 60 is provided on the pressed surface 40 of the wedge 40.
It is formed to be perpendicular to F. The spring plunger 20 is screwed into the screw hole 21 thus formed to an appropriate depth.

In the face milling machine of the second embodiment, in order to adjust the run-out by aligning the positions of the front cutting blades 12 of the tips 30 in the direction of the axis O, the adjusting mechanism is rotated by rotating the adjusting screw 51. Is inserted into the second recess 50, that is, the inner peripheral side of the tool, whereby the side surface 30D is pressed to push the tip 30 toward the tip end of the tool. 12 is the axis O
May be located on a single plane orthogonal to. Here, in the second embodiment, when the spring plunger 20 is viewed from the outer peripheral side of the tool body 1, the tip 3
0, the reaction force from the tip received by 40Ba, which is the surface on the tool tip side of the wedge 40, during the run-out adjustment and machining, and the pressing force of the spring plunger 20 are directed in the same direction. As a result, the spring plunger 20 is used to prevent the wedge 40 from rattling.
Control of the pressing force becomes easier. In the second embodiment, the spring plunger 20 is disposed in parallel with the tip 30 when viewed from the outer peripheral side of the tool body 1 because the second recess 50 for accommodating the wedge 40 is provided. The contact area of the wall surface 50D facing rearward in the tool rotation direction T with the wedge 40 is wider than that of the wall surface 7E of the first embodiment, so that the wedge 50 has a corresponding play. Because it can be suppressed.

In each of the above-described embodiments, the spring plunger is used as the prevention means for preventing the wedge 8 as the pressing member of the adjustment mechanism from sticking. However, the prevention means is not necessarily limited to the spring plunger. For example, a plate made of a resin material having elasticity may be interposed at the tip of the screw mechanism, and the wedge may be pressed in a predetermined direction via the resin plate. Any urging means for urging the pressing member is sufficient.

[0029]

As described above, according to the present invention,
Since the pressing mechanism of the adjusting mechanism is provided with a preventing means for preventing the rattling of the pressing member, the pressing member of the adjusting mechanism receives the processing reaction force from the tip member during the processing, but the pressing member itself does not rattle by the preventing means. Because it is prevented, the tipping member can be pushed out without tilting the pressing member during runout adjustment, so that the front cutting edge is accurately positioned at a predetermined position in the axial direction, and high accuracy Can be adjusted. Also, during processing, even if the processing reaction force is great, and even if the processing reaction force acts on the pressing member via the chip member, the pressing member does not rattle, and in this regard, the chip member also High-precision run-out adjustment of the front cutting edge can be performed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of the present invention.

FIG. 2 is a bottom view of the first embodiment viewed from a tool tip side.

FIG. 3 is an enlarged view as viewed in a direction indicated by an arrow X in FIG. 1;

FIG. 4 is an enlarged view of a tip of the chip according to the first embodiment.

FIG. 5 is a side view showing a second embodiment of the present invention as viewed from the outside in the radial direction.

FIG. 6 is a bottom view of the second embodiment.

FIG. 7 is a sectional view of the second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tool main body 2 Tip pocket (recess) 3 Tip mounting seat (recess) 3A Wall surface (mounting seat surface) 4 First recess (recess) 5 Tip (tip member) 5B Seating surface 6 Wedge 7 Second recess 8 Wedge (pressing member of adjustment mechanism) 12 Front cutting edge 20 Spring plunger (prevention means, urging means) 21 Screw hole 30 Tip (tip member) 40 Wedge (pressing member of adjustment mechanism) 50 Second recess

Continued on the front page F term (reference) 3C022 HH01 HH07 HH08 HH09 NN01 3C046 EE12 EE17

Claims (4)

[Claims] 1. A chip member having a cutting front blade protruding toward a tool tip side in a concave portion formed on an outer periphery of a tip portion of a substantially disk-shaped tool body rotated about an axis, and a seating surface thereof is clamped by a clamp member. The tip of the front cutting blade is pressed against the mounting seat surface provided on the concave portion side and is detachably mounted on the tool body, and the tip member is pressed toward the tool tip side via a pressing member. A throw-away type front milling machine provided with an adjusting mechanism for adjusting a run-out to the side, comprising a preventing means for preventing rattling of a pressing member of the adjusting mechanism. 2. The prevention means is a biasing means for pressing a portion of the pressing member on the front end side of the tool opposite to a portion for pressing the tip member toward a rear end of the tool. The indexable face mill according to claim 1, characterized in that: 3. The tool according to claim 2, wherein the biasing means is a spring plunger, and the spring plunger is separated from the tip member at an angle to the tip member at an angle to the tip member when viewed from the outer peripheral side of the tool body. 3. The indexable face mill according to claim 2, wherein the face mill is arranged to be inclined with respect to the member. 4. The throwr according to claim 2, wherein the biasing means is a spring plunger, and the spring plunger is disposed in parallel with the tip member as viewed from an outer peripheral side of the tool body. Away face milling machine.