JP2000015503A - Method of clamping indexable insert, milling cutter, cutter body, and cutter body - Google Patents

Abstract

(57) [Summary] [PROBLEMS] A method of clamping a throwaway tip, which can firmly fix the throwaway tip and prevent the throwaway tip from jumping out due to centrifugal force,
Providing a milling cutter, cutter body and cutter body body. SOLUTION: A locking hole 7a of a chip 7 is fitted to a pin 27 of a cartridge 9, and the chip 7 is attached to the cartridge 9. Next, the cartridge 9 on which the chip 7 is locked is arranged on the adjusting plate 17 and the second screw member 19 is tightened to fix the cartridge 9 to the cutter body main body 1. Next, the wedge 11 is arranged so that the side surface of the wedge 11 on the chip 7 side in the circumferential direction contacts the upper surface of the chip 7. Then, the wedge 11 is pressed inward in the radial direction by tightening the first screw member 23, whereby the upper surface of the chip 7 is pressed by the side surface of the wedge 11,
Is pressed and fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of clamping a throw-away tip for fixing a throw-away tip to an outer periphery on a tip side of a tool, a milling cutter for performing cutting by rotating the tool, a cutter body,
And the body of the cutter body.

[0002]

2. Description of the Related Art Conventionally, a milling cutter has a fixed insert having a cutting edge on the outer periphery on the tip side thereof. The following methods are known as methods for fixing the fixed insert. ing.

As shown in FIG. 6A, first, a throw-away tip P3 is fitted into a concave tip seat P2 of a cutter body main body P1. Thereafter, a wedge P4 is fitted from the radial direction next to the throw-away tip P3, and the screw P5 is tightened. As a result, the wedge P4 advances inward in the radial direction (the direction of arrow A in the figure), so that the throw-away tip P3 is pressed in the circumferential direction (the direction of arrow B in the figure) by the side surface of the wedge P4, and the cutter body Body P
Fixed to 1 (wedge method).

As shown in FIG. 6B, first, a throw-away tip Q3 is fitted into a tip seat Q2 of a cutter body main body Q1. A hole Q4 penetrating the throw-away tip Q3 is provided in the upper and lower direction of the throw-away tip Q3, and a screw Q5 is inserted into the hole Q4 and tightened. Thereby, the throw away tip P
Reference numeral 3 is fixed to the cutter body main body Q1 (screw-on type).

[0005]

However, the above-mentioned prior art is not always satisfactory because of the following problems. For example, in the above technique, the pressing and fixing (clamping) by the wedge P4 is insufficient,
If the screw P5 for stopping the screw 4 is loosened, there is a possibility that the throw-away tip P3 may fly out due to centrifugal force.

Further, in the above-mentioned technique, it is often necessary to use a screw Q5 smaller than the screw P5 used in the wedge method, depending on the size of the throw-away tip Q3. May be weak. Further, in the case of a high-speed rotating tool to which a high centrifugal force is applied, the screw Q5 may be damaged.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a method of clamping a throw-away tip, which can firmly fix the throw-away tip and prevent the throw-away tip from jumping out by centrifugal force, and a milling machine. It is an object to provide a cutter, a cutter body, and a cutter body main body.

[0008]

According to a first aspect of the present invention, there is provided a method for clamping a throw-away tip on a tip seat of a milling cutter. A pin protruding from the bottom side in a substantially circumferential direction of the cutter body body is provided, and a locking hole provided in the throw-away tip is fitted to the pin, and the pin is locked with the throw-away tip, and 1. A method of clamping a throwaway tip, comprising: pressing a top surface of the throwaway tip to fix the throwaway tip by tightening the screw member and moving a wedge radially inward of the cutter body main body. Is the gist.

According to the present invention, when a throw-away tip (hereinafter, also simply referred to as a tip) is fixed, first, a pin is inserted into a locking hole of the tip so that the tip is locked to the pin. A wedge is placed on the upper surface of the chip. Since the wedge has a larger dimension after the front in the traveling direction, the wedge is pushed in the traveling direction (ie, radially inward of the cutter body main body) by tightening the first screw member. go. Thereby,
The chip is fixed by pressing the upper surface of the chip with the side surface of the wedge.

Therefore, even when the milling cutter rotates and receives a large centrifugal force when the force for pressing the wedge chips is insufficient or when the first screw member is loosened, the chips are engaged with the pins. Because it is stopped, it does not jump out. (2) The invention according to claim 2 is a method of mounting the throw-away tip on the cutter body main body using a cartridge, wherein the pin is provided on a bottom surface of a cartridge-side tip seat, and the pin is attached to the throw-away. With the cartridge inserted into the locking hole of the chip, the cartridge is
2. The throw-away tip according to claim 1, wherein the screw member is tightened to be moved radially inward of the cutter body main body and fixed, and then the wedge is used to fix the throw-away tip. Gist the clamping method.

The present invention shows an example in which a cartridge is used as a member for fixing a chip. That is, the tip is not directly attached to the cutter body main body, but is fixed using the cartridge.
Specifically, the pin of the cartridge is fitted into the locking hole of the chip, and the chip is locked by the cartridge. Therefore, the second screw member is tightened in a state where the chip is locked by the pin. Thus, the cartridge can be attached to the cutter body main body. Therefore, thereafter, the chip can be fixed in a state of being locked to the cartridge by pressing the upper surface of the chip with a wedge, similarly to the first aspect.

(3) A third aspect of the present invention is a milling cutter for cutting a workpiece with a throw-away tip fixed to a tip seat, wherein the milling cutter protrudes from a bottom surface side of the tip seat in a substantially circumferential direction of a cutter body main body. Pin to
The throw-away tip having a locking hole into which the pin is fitted, and the upper surface of the throw-away tip in a state where its side surface is locked to the pin by its own radially inward movement of the cutter body main body. The present invention provides a milling cutter including a wedge to be pressed and fixed, and a first screw member to move the wedge radially inward of the cutter body main body and to fix the wedge.

In the present invention, when fixing the chip,
First, a pin is fitted into the locking hole of the chip so that the chip is locked to the pin, and a wedge is arranged on the upper surface side of the chip. Then, by tightening the first screw member and pushing the wedge inward in the radial direction, the upper surface of the chip is pressed by the side surface of the wedge to fix the chip.

Therefore, when the force for pressing the wedge chip is insufficient or when the first screw member is loosened, even when the chip receives a large centrifugal force, the chip is locked by the pin, so Never jump out. Here, as the locking hole of the chip, for example, a hole penetrating in the thickness direction of the chip can be cited, but it is not always necessary to penetrate if only the chip is locked.

Further, as for the relation between the outer diameter of the pin and the inner diameter of the hole of the chip, for example, if the inner diameter of the hole is slightly larger than the outer diameter of the pin (for example, a difference of 0.2 mm in diameter), Is easy to attach and detach. (4) The invention according to claim 4 is a cartridge for fixing the throw-away tip, wherein the cartridge is provided on the concave attachment portion of the cutter body main body and has the pin protruding from the bottom surface of the cartridge-side tip seat. A second screw member which is fixed to the inside of the cutter body main body in a radial direction by fixing the milling cutter according to claim 3 to the gist.

The present invention shows an example in which a cartridge is used as a member for fixing a chip. That is, the chip is not directly attached to the cutter body main body, but is fixed using the cartridge at the concave attachment portion. Specifically, the pin of the cartridge is fitted into the locking hole of the chip, and the chip is locked by the cartridge. Therefore, the second screw member is tightened in a state where the chip is locked by the pin. Thus, the cartridge can be attached to the cutter body main body. Therefore, thereafter, as in claim 3,
By pressing the upper surface of the chip with a wedge, the chip can be fixed in a state of being locked to the cartridge.

(5) The invention according to claim 5, wherein the cartridge has a configuration in which a radially inner side of the cutter body main body is opened at a cartridge-side tip seat to which the throw-away tip is attached, The gist of the milling cutter according to claim 4, wherein the away tip has a configuration in which the away tip protrudes from an open inner peripheral end surface of the cartridge while being locked to the pin.

In the present invention, when the chip is locked on the pin, the chip protrudes from the open inner peripheral end surface of the cartridge. Therefore, when the cartridge is fixed by tightening the second screw member, the chip is pressed and fixed by, for example, a pin.

Thus, the chip can be fixed firmly even if there is some backlash between the pin and the locking hole of the chip. Further, the dimensional accuracy of the pin and the locking hole does not need to be so high, so that the processing steps can be simplified. (6) The invention according to claim 6 is such that the locking hole of the throw-away tip is a through hole, and the height of the pin is set to a dimension protruding from the upper surface of the throw-away tip when the throw-away tip is fixed. 6. A projection provided on a side of the throw away tip of the wedge for restricting a movement of the pin to a radial outside.
The gist is a milling cutter described in any of the above.

In the present invention, the locking hole of the chip is a through hole, and the dimension (height of the pin) is such that when the pin is passed through the locking hole, the head of the pin projects from the upper surface of the chip. . In addition, a convex portion is provided on the tip side surface of the wedge to restrict the radial movement of the pin.

Accordingly, even when the second screw member is loosened and the cartridge rattles due to the centrifugal force, the cartridge can be prevented from jumping out by locking the head of the pin to the projection of the wedge. . (7) The invention according to claim 7, wherein a third screw member is provided on the rear end side of the cartridge to abut on the cartridge to adjust the axial position of the cartridge. The gist of the present invention is a milling cutter according to any one of Items 3 to 6.

In the present invention, the position of the cartridge in the axial direction (front end side or rear end side) can be adjusted by the third screw member. In this case, there is some room between the second screw member for fixing the cartridge and the screw hole. Therefore, after the cartridge is positioned in the axial direction by the third screw member, the cartridge can be fixed by the second screw member.

(8) The invention according to claim 8, wherein an adjusting plate for adjusting a radial position of the cartridge is disposed between the cartridge and the cutter body main body. The gist of the present invention is a milling cutter described in any one of (1) to (7).

In the present invention, an adjusting plate is arranged between the cartridge and the cutter body main body. Therefore, by changing the thickness of the adjustment plate (for example, by replacing the adjustment plate), the radial position of the cartridge (and thus the chip) can be adjusted. (9) The invention according to claim 9 is characterized in that at least the cutting edge of the indexable insert is made of a super hard tool material or a material obtained by coating the surface of the super hard tool material with diamond. The gist of the present invention is a milling cutter according to any one of claims 3 to 8.

The present invention exemplifies a chip that can be used. Here, as the tip, an ultra-hard tool material having a cutting edge or a material obtained by coating the surface of the ultra-hard tool material with diamond can be used. (10) The invention according to claim 10 is a cutter body constituting a milling cutter, wherein the cutter body comprises:
The gist of the cutter body according to any one of claims 1 to 9 is that the chip is removed from the milling cutter.

The present invention shows a cutter body. A member for attaching a chip (for example, a cartridge or a wedge, and first and second screw members for fixing them) is attached to the cutter body.
No tip is attached.

(11) An eleventh aspect of the present invention is the cutter body main body used in the milling cutter according to the third, fourth, ninth or tenth aspect, wherein the cutter body main body has a concave shape. A gist of the cutter body main body is characterized in that the pins are directly erected on the bottom surface of the tip seat.

The present invention shows a cutter body main body. The cutter body has a chip and a member for attaching the chip (for example, a cartridge and a wedge, and first and second screw members for fixing the same).
Is not installed. Here, the above terms will be described.

Generally, for a single throw-away chip, the plane perpendicular to the thickness is called the upper and lower surfaces, and the other is called the outer peripheral surface. Here, the lower surface of the throw-away tip is
The surface facing inward at the time of mounting (that is, the surface on the device side to which the throw-away tip is mounted), and the upper surface is the surface facing the opposite side.

Since the mounting portion of the device to which the throw-away tip is mounted is called a chip seat, the mounting portion corresponding to the lower surface of the throw-away chip is called the bottom surface of the chip seat. In addition, the throw away tip
There is a case where it is directly mounted on the cutter body main body and a case where it is mounted via a cartridge. Therefore, when a cartridge is used, a portion where the throw-away chip is mounted on the cartridge is referred to as a cartridge-side chip seat.

The above-mentioned milling cutter refers to a cutter in which a chip or a member for attaching the chip is mounted on a rotating main body (cutter body main body). The cutter body is the one obtained by removing a chip from a milling cutter (however, a member for mounting the chip is mounted). The milling cutter main body indicates a milling cutter from which chips and members for attaching the chips are removed.

FIG. 1 shows the radial direction, the radially inner side (and the outer side), the circumferential direction, and the axial direction (the front end side and the rear end side).

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment (embodiment) of a method for clamping a throw-away tip, a milling cutter, a cutter body, and a body of a cutter body according to the present invention will be described with reference to the drawings. (Example) a) First, a milling cutter of the present example will be described.

As shown in FIGS. 2 (a) and 2 (b), the milling cutter of the present embodiment has a substantially cylindrical aluminum alloy (JIS A7075S) cutter body main body 1 and has a tip side (machining). The cutting portions 3 are provided at eight locations along the outer periphery of the (surface side).

That is, eight concave mounting portions 5 are provided along the outer periphery on the distal end side of the cutter body main body 1, and in this mounting portion 5, a carbide throw-away chip (hereinafter referred to as a chip) is provided. The cutting portion 3 is configured by disposing a cartridge 9 made of alloy steel (JIS SCM435) for mounting the chip 7 and a wedge 11 made of the same alloy steel.

In FIG. 2B, in order to clarify the structure of the milling cutter, two of the eight cutting portions 3 are shown.
The chip 7 is not arranged in the cut portion 3 at one position, and the chip 7 and the wedge 11 are not arranged in one cut portion 3. Among them, the mounting part 5 is
As shown in FIG. 3A, the first concave portion 13 which is long in the axial direction is provided.
And a second recess 15 extending in the circumferential direction from the tip side of the first recess 13. The first recess 13 and the second
As shown in FIG. 3B, the bottom of the recess 15 is bent (for example, about 25 °) so that the chip 7 and the cartridge 9 can be easily mounted.

As shown in FIG. 4, an adjusting plate 17 is disposed in the first recess 13 and a second adjusting plate 17 is provided from above.
The cartridge 9 to which the chip 7 is attached is fixed by the screw member 19. Further, a third screw member 21 is attached to the first recess 13 at the rear end side of the cartridge 9. Further, the wedge 11 is fixed to the second recess 15 by the first screw member 23. Hereinafter, each configuration will be described in detail.

The adjusting plate 17 is a rectangular plate.
In the center thereof is a through hole 1 into which the second screw member 19 is inserted.
7a is formed, and a through hole 17b for fixing the adjusting plate 17 itself to the milling cutter main body 1 with a screw 25 (see FIG. 3A) is provided on the slightly distal end side. The adjusting plate 17 is for adjusting the radial position of the cartridge 9 (therefore, the chip 7). By appropriately selecting the adjusting plate 17 having a different thickness, the radial position of the cartridge 1 can be set to a desired value. Can be set to a value.

The cartridge 9 is a substantially quadrangular prism-shaped member, and has a through hole 9a into which the second screw member 19 is inserted in the radial direction (the vertical direction in FIG. 4) with respect to the cutter body main body 1 to be mounted. As shown in FIG. 5 (a), a cartridge-side chip seat 9b, which is a substantially square notch for mounting the chip 7,
Is formed.

At the approximate center of the cartridge-side chip seat 9b, a pin 27 projecting from the side of the cartridge 9 (ie, the bottom surface of the cartridge-side chip seat 9b) is provided upright. 6.5 mm) is set to be larger than the thickness of the chip 7 (for example, 4.8 mm). Therefore, when the chip 7 is fitted into the locking hole (through hole) 7a provided in the center of the chip 7, the head of the pin 27 is positioned from the upper surface of the chip 7 as shown in the cross section in FIG. The portion projects slightly (for example, 1.7 mm). The outer diameter of the pin 27 (for example, 5.0 mm) is set slightly smaller than the inner diameter (for example, 5.2 mm) of the locking hole 7a of the chip 7 (for example, the difference in diameter is 0.2 mm). Therefore,
When the pin 27 is passed through the locking hole 7a of the chip 7, there is a clearance in which the chip 7 can slightly move.

The dimension of the chip 7 in the vertical direction (in the direction of the outer peripheral surface of the chip 7) in FIG.
m) is the dimension (for example, 11.5 m) of the cartridge 9 in the vertical direction (radial direction when the cartridge 9 is mounted) in FIG.
m) is set slightly larger than m). In particular, in the present embodiment, when the cartridge 9 is fixed by the second screw member 19,
The position of the pin 27 and the dimensions of each member are set so that the outer peripheral surface of the member protrudes.

As shown in FIG. 4, a diamond is placed on the corner of the tip 7, specifically, on the outer peripheral side of the tip side of the cutter body main body 1 where the head of the pin 27 projects. Cutting edge 29 made of aluminum. The wedge 11
Is a member having a substantially cubic shape, but since it is a wedge, its circumferential side surfaces are located ahead (radially inside) after the traveling direction (radially outside of the cutter body main body 1).
The distance between them becomes smaller toward. This wedge 1
A through hole 11a through which the first screw member 23 penetrates is provided in the radial direction 1.

In particular, in this embodiment, as shown in FIGS. 5B and 5C, the wedge 11 has a circumferential side surface on the chip side.
A groove 11b into which the head of the pin 27 enters is formed.
The groove 11b is formed in the wedge 1 on the side surface on the chip 7 side.
1 extends from the bottom side (lower side in the figure) toward the upper side (upper side in the figure), but does not reach the upper side. That is, the upper side of the groove 11b is a projection 11c so that the head of the pin 27 cannot move any more.

As shown in FIG. 4, a third screw member 21 for adjusting the axial position of the cartridge 9 is disposed at the rear end of the cartridge 9. When the third screw member 21 is screwed in, the head 21a thereof comes into contact with the rear end of the cartridge 9 to move the cartridge 9 to the front end in the axial direction.

B) Next, a method of attaching the chip 7 will be described. As shown in FIG. 4, first, the adjusting plate 17 is arranged at the bottom of the first recess 13 and a screw 25 (see FIG. 3A).
Fix with. Next, the engaging hole 7a of the chip 7 is fitted into the pin 27 of the cartridge 9, and the chip 7 is
Attach to At this time, the outer peripheral surface of the chip 7 protrudes below the inner peripheral end surface of the cartridge 9.

Next, the cartridge 9 in which the chip 7 is locked is placed on the adjusting plate 17, and the second screw member 19 is tightened. Fixed to. At the same time, the third screw member 21 is tightened to determine the axial position of the cartridge 9.

When the cartridge 9 is fixed to the mounting portion 5, the bottom surface of the cartridge-side tip seat 9b extends in the radial direction of the cutter body main body 1, and the pin 27 extends in the circumferential direction (tangential direction) of the cutter body main body 1. ). Next, the side surface of the wedge 11 on the chip 7 side in the circumferential direction is
The wedge 11 is arranged so as to be in contact with the upper surface of the chip 7.
At this time, the head of the pin 27 is
b. Then, the wedge 11 is pressed radially inward by tightening the first screw member 23, whereby the upper surface of the chip 7 is pressed by the side surface of the wedge 11, and the chip 7 is pressed and fixed (clamped). .

C) Next, an experimental example performed to confirm the effect of the present embodiment will be described. The milling cutter used for the experiment and the experimental conditions are as follows. Cutter diameter: 100 mmφ Number of chips (number of blades): 8 (8 cutting portions) Type of chip: Tightening torque of ISO CNGA43 wedge; 10 Nm Rotation speed of cutter: 40000 rpm And, according to the above experimental conditions, Conventional type (Fig. 6
Each milling cutter was rotated using a milling cutter (see (a)) and a milling cutter of the type of this embodiment (the number of blades was different).

As a result, the milling cutter of this embodiment is preferable because the chips did not protrude outside. On the other hand, the conventional milling cutter is not preferable because the chip immediately jumps out. d) The following effects are obtained by the configuration of the present embodiment described above.

In this embodiment, the pin 27 is fitted into the locking hole 7a of the chip 7 so that the chip 7 is locked on the pin 27, and the wedge 11 is arranged on the side surface of the chip 7. 11, the upper surface of the chip 7 is pressed and fixed. Therefore, even when the force of pressing the chip 7 of the wedge 11 is insufficient or the first screw member 23 is loosened, the chip 7 is locked to the pin 27 when the milling cutter rotates, so that the chip 7 cannot be removed. Never jump out.

In the embodiment, when the chip 7 is locked on the pin 27, the chip 7 protrudes from the inner peripheral end surface of the cartridge 9 in the fixing direction. Therefore, when the second screw member 19 is tightened to fix the cartridge 9, the chip 7 is pressed by the pin 27 and pressed against the adjustment plate 17.

Thus, even if there is some backlash between the pin 27 and the locking hole 7a of the chip 7, the chip 7 can be firmly fixed. Further, the dimensional accuracy of the pin 27 and the locking hole 7a does not need to be so high, so that the processing steps can be simplified. Further, in this embodiment, when the pin 27 is passed through the locking hole 7a of the chip 7,
The head of the pin 27 protrudes from the upper surface of the. Therefore, even when the second screw member 19 is loosened and the cartridge 9 rattles due to centrifugal force, the head of the pin 27 is locked to the projection 11 c of the wedge 11, so that the cartridge 9
Can be prevented from jumping out.

The present invention is not limited to the above-described embodiment, and it goes without saying that the present invention can be implemented in various modes without departing from the gist of the present invention. (1) For example, considering only the point of preventing the chip from falling out, a hole that does not penetrate the chip in the thickness direction of the chip may be used as the chip locking hole.

(2) In the above embodiment, the cartridge having the pins is used, but the pins may be directly projected from the cutter body without using the cartridge. That is, a concave tip seat may be provided in the cutter body main body, and a pin may be provided upright on the bottom surface of the tip seat. In this case, the bottom surface of the tip seat extends in the radial direction of the cutter body main body, and the pin extends in the circumferential direction (tangential direction) of the cutter body main body.

It is to be noted that another member may be appropriately arranged between the chip seat and the chip so as to sandwich another member. This is the same for the cartridge-side chip seat. (3) In the above-described embodiment, a chip in which a diamond blade is joined to the cutting edge has been described as an example. However, the present invention is not limited to this. The cutting edge is a super-hard tool material or the surface of the super-hard tool material is coated with diamond. Things can be adopted.

(4) In the above-described embodiment, the milling cutter in which the tip and the member for attaching the tip are mounted on the cutter body main body has been described. This is the same as the configuration of the milling cutter of the above embodiment.

[0057]

As described above in detail, in the method for clamping a throw-away tip and the milling cutter of the present invention, the throw-away tip and the like can be firmly fixed. Even when the member is loosened, it is possible to prevent the throw-away tip or the like from jumping out.

Further, by mounting the throw-away tip on the cutter body, it is possible to prevent the throw-away tip or the like from jumping out and to perform a suitable milling process. Similarly, by attaching the throw-away tip to the cutter body main body using the fixing member, it is possible to prevent the throw-away tip or the like from jumping out, and to suitably perform milling.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing directions in a milling cutter of the present invention.

FIG. 2 shows a milling cutter of the present embodiment, and (a)
Is a plan view thereof, and (b) is a front view thereof.

FIG. 3A is an explanatory diagram showing a concave portion of the milling cutter of the present embodiment, and FIG. 3B is an explanatory diagram showing members attached to the concave portion.

FIG. 4 is an exploded perspective view showing members constituting a cutting part of the milling cutter of the present embodiment.

5A is an exploded perspective view of a chip and a cartridge, FIG. 5B is a cross-sectional view showing a relationship between a wedge and a cartridge, and FIG. 5C is a perspective view showing a wedge.

FIG. 6 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Cutter body main body 3 ... Cutting part 5 ... Mounting part 7 ... Indexable tip 9 ... Cartridge 11 ... Wedge 11a ... Groove 17 ... Adjustment plate 19 ... Second screw member 21 ... Third screw member 23 ... First Screw member 27 ... Pin

Claims (11)

[Claims] 1. A method of clamping a throw-away tip to a tip seat of a milling cutter, comprising: a pin projecting from a bottom surface side of the tip seat in a substantially circumferential direction of a cutter body main body; By fitting the locking hole provided in the throw-away tip, and in a state where the throw-away tip is locked to the pin, tightening the first screw member to move the wedge radially inward of the cutter body main body. And clamping the throw-away tip by pressing an upper surface of the throw-away tip. 2. A method of mounting the throw-away tip on the cutter body body using a cartridge, wherein the pin is provided on a bottom surface of a cartridge-side tip seat, and the pin is a locking hole of the throw-away tip. In the state where the cartridge is inserted into the cutter body, the second screw member is tightened to move the cartridge inward in the radial direction of the cutter body main body, and then fixed, and then the indexable tip is fixed using the wedge. The method for clamping a throw-away tip according to claim 1, wherein 3. A milling cutter for cutting a workpiece with a throw-away tip fixed to a tip seat, wherein a pin protruding from a bottom side of the tip seat in a substantially circumferential direction of a cutter body body, and the pin is fitted. A throw-away tip having a locking hole, and a radially inward movement of the cutter body body to press and fix an upper surface of the throw-away tip in a state where its side face is locked to the pin. A milling cutter comprising: a wedge; and a first screw member that moves the wedge radially inward of the cutter body main body and fixes the wedge. 4. A cartridge for fixing the throw-away tip, wherein the cartridge is disposed on a concave mounting portion of the cutter body main body and has the pin protruding from a bottom surface of a cartridge-side tip seat. 4. The milling cutter according to claim 3, further comprising: a second screw member that is fastened and fixed radially inward. 5. The cartridge has a configuration in which a radially inner side of the cutter body main body is opened at a cartridge side tip seat to which the throw away tip is attached, and the throw away tip is engaged with the pin. 5. The cartridge according to claim 4, wherein the cartridge is configured to protrude from an open inner peripheral end surface of the cartridge in a stopped state.
Milling cutter as described in. 6. A locking hole of the tip is a through hole, a height of the pin is set to a size protruding from an upper surface of the throw away tip when the throw away tip is fixed, and the wedge is provided on a side of the throw away tip. The milling cutter according to any one of claims 3 to 5, further comprising a projection for restricting the pin from moving radially outward. 7. A cartridge according to claim 3, wherein a third screw member is provided at a rear end side of said cartridge to abut on said cartridge to adjust an axial position of said cartridge. Milling cutter according to any of the above. 8. An adjusting plate for adjusting a radial position of the cartridge is disposed between the cartridge and the cutter body main body.
A milling cutter according to any one of claims 1 to 7. 9. The method of claim 3, wherein at least the cutting edge of the indexable insert is made of a super-hard tool material or a material obtained by coating the surface of the super-hard tool material with diamond. A milling cutter according to any one of claims 1 to 8. 10. A cutter body constituting a milling cutter, wherein the cutter body is obtained by removing the indexable insert from the milling cutter according to any one of claims 3 to 9. And the cutter body. 11. A cutter body used for the milling cutter according to claim 3, 4, 9 or 10, wherein the pin is provided on a bottom surface of a concave tip seat provided in the cutter body. The cutter body is characterized in that the body is directly erected.