JPH0570824U - Throwaway cutter - Google Patents

Abstract

(57) [Summary] [Purpose] A throwaway type cutter with which the position of the front cutting edge can be adjusted easily and accurately, and the rigidity of the tool body is high. A tool body (1) has a normal cutting edge (2) at the tip of its outer periphery, and a bottom surface opens at the tool body tip surface (1A) toward the tip in the axial direction of the tool body (1). A cartridge 13 in which a throwaway tip 10B having a flat blade 3 protruding toward the axial end is mounted in a concave portion 14 forming an inclined surface 15 projecting toward the axial end while the side surface is in contact with the inclined surface 15 Tightening screw 1
8 is movably mounted on the inclined surface 15, and the narrow end side end surface of the wedge 8A is inserted between the side wall of the concave portion 14 and the cartridge 13 toward the bottom surface side of the concave portion 14. It is mounted so as to be movable in the substantially axial direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is a combination type finishing throw-away type cutter that has a normal cutting edge for general cutting and a cutting edge for finishing cutting in the tool body, and the position of the cutting edge can be adjusted easily and accurately. It is possible to provide a cutter with high rigidity.

[0002]

[Prior Art]

 In general, a finishing cutter has a cutting edge called a flat cutting edge with a wide cutting width at the tip of the tool body, and the finishing cutting is performed by the cutting edge. In particular, a throwaway type cutter (hereinafter abbreviated as a cutter) that uses a throwaway tip (hereinafter abbreviated as a tip) for the cutting edge does not require re-grinding and the tool body is semi-permanent. It is widely used because it can be used for various purposes and reduces the tool cost.

Among this type of cutter, it has a normal cutting edge for general cutting and a flat cutting edge for finish cutting, and in normal cutting, at the same time as the general cutting with the normal cutting edge is performed, For example, the one found in JP-A-60-85816 is disclosed as the one to be subjected to the finish cutting.

Examples of these conventional cutters are shown in FIGS. 5 and 6. This cutter has a plurality of ordinary cutting edges 2 and at least one sweeping edge 3 at least on the outer periphery of an annular tool body 1 which is rotated about an axis. One wiper blade 3 is shown in each case.

In this cutter, chip pockets 4A and 4B are formed on the outer peripheral portion of the tool body 1 with a part thereof being removed toward the outer periphery, and these pockets 4A and 4B are located in the rear of the cutting rotation direction. Recesses 5A and 5B are formed respectively. Locators 6A and 6B are incorporated in the recesses 5A and 5B, respectively.

Here, the locator 6A is pressed and fixed in the recess 5A through the wedge 8 mounted in the recess 5A by the clamp screw 7. On the other hand, the locator 6B is fixed in the recess 5B only with the screw 9 in order to reduce the space occupied by the locator 6B in the tool body 1.

Further, tips 10A and 10B each having a normal cutting edge 2 or a flat cutting edge 3 on the ridge portion are attached to the tips of the locators 6A and 6B.

The ordinary cutting edge 2 is located closer to the outer circumference of the tool body 1 than the outermost edge of the flat blade 3. This is because in normal cutting, rough cutting with the normal cutting edge 2 is performed first, and then finish cutting with the rough edge 3 is performed, so that rough cutting and finish cutting are performed in one cutting operation. is there.

[0009]

[Problems to be solved by the device]

 Generally, in the cutter, in order to improve the finished surface roughness of the work material after exchanging the tip, the work of adjusting the position of the cutting edge to achieve the optimum position for cutting, which is called runout adjustment, is performed. In particular, in the case of a finishing cutter having the sweeping blade 3, extremely high dimensional accuracy and surface roughness accuracy are required for the work material after cutting, so in adjusting the runout of the sweeping blade 3, it is better than a general cutter. It is necessary to make a very slight vertical movement of the cutting edge. Here, in the above-mentioned conventional finishing cutter, the rotation of the screw 9 causes the locator 6B to directly move up and down in the recess 5B to perform the shake adjustment. However, since the locator 6B largely moves up and down along the axis of the screw 9 by a slight rotation of the screw 9, it is difficult to finely adjust the position of the cutting edge, and the rotation of the screw 9 causes the recess 5B to move. A gap is created between the locator 6B and the locator 6B to make the locator 6B unstable, and the stress in the axial direction of the tool body 1 generated between the sweeping blade 3 and the work material during cutting is concentrated on the screw 9, It could cause distortion and damage.

For the purpose of solving these problems, a position adjusting mechanism of the flat blade 3 as disclosed in, for example, Japanese Patent Laid-Open No. 60-186311 is disclosed. An example of this type of cutter is shown in FIGS. In this cutter, a cartridge 13 is mounted in a recess 12 formed at the rear of a chip pocket 11 formed in the outer peripheral portion of a tool body 1 in the cutting rotation direction, and a tip having a burring blade 3 at the ridge portion at its tip. 10B is mounted, and the wedge 8 is attached to the base end portion of the cartridge 13 in the axial direction by the clamp screw 7. The clamp screw 7 is rotated to push the wedge 8 into the concave portion 12, and the cartridge 13 is removed. The runout was adjusted by pushing it out in the direction of the axis of the tool body. However, the amount of change in the axial width of the wedge 8 pushed into the recess 12 by the rotation of the clamp screw 7 and the amount of movement of the axial width of the cartridge 13 pushed out in the same direction as a result are Since they are the same, there is a problem that the pushing width of the cartridge 13 largely changes due to the difference in the rotation of the clamp screw 7, which makes it difficult to adjust the shake.

[0011]

[Means for Solving the Problems]

 The present invention is a combination-type finishing slow-away type cutter in which the normal cutting edge is located on the outer peripheral side of the outermost edge of the flat blade so that the bottom surface faces the tip end side in the tool body axial direction with respect to the tool body tip end surface. The cartridge is allowed to move along the inclined surface into a concave portion that is opened and has an inclined surface that gradually protrudes toward the tip side in the axial direction of the tool body from one end of the concave portion toward the other end on the bottom surface. It is attached with a tightening screw with its side surface in contact with the inclined surface.In addition, a throwaway tip is provided on the cartridge with a flat blade formed on its ridge on the tip side of the tool body. The cartridge is mounted in a projecting state, and the narrow-side end of the recess is located between one of the side walls on one side or the other side of the recess and the cartridge. Inserted wedges to face the bottom side of the concave portion is a Suroauei cutter comprising adjustably mounted the push and inclusive amount to the axial direction.

[0012]

[Action]

 In the present invention, the cartridge moves in the longitudinal direction of the inclined surface in accordance with the amount of change in the width of the wedge pushed in, and in the axial direction of the tool body in accordance with the inclination of the inclined surface. Therefore, if the inclination of the inclined surface is made sufficiently small, the movement distance in the axial direction of the cartridge with respect to the movement of the cartridge in the longitudinal direction becomes small, and the change in the shake amount of the sweeping blade can be reduced. Therefore, it is possible to easily and accurately adjust the runout of the wiper blade.

[0013]

【Example】

 Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings. Note that the same parts as those in FIGS.

1 to 3 show a first embodiment of the present invention. The tool body 1 has an annular shape as shown in FIG. 1, and on the arc centered on the axis of the tool body tip surface 1A, the tool body tip surface 1A is arranged in the base direction along the tangential direction to the arc. A recess 14 formed by cutting out is provided. Here, the bottom surface of the concave portion 14 gradually projects toward the tip side in the axial direction of the tool body 1 as the longitudinal direction goes from the rear end of the concave portion 14 along the cutting rotation direction of the tool body 1 (arrow X in FIG. 1) toward the tip. The inclined surface 15 is formed and is formed at the same height in the direction orthogonal to the longitudinal direction. A tip pocket 16 formed by cutting out the tool body front end surface 1A is provided at the front end of the recess 14 in the rotation direction.

Further, the cartridge 13 is movably attached to the inside of the recess 14 along the inclined surface 15 by the tightening screw 18 inserted into the elongated hole 17, and the tip of the tool body tip surface 1A side is attached to the tip thereof. A mounting recess 19 is formed. A flat plate-shaped substantially square chip 10B is detachably mounted in the mounting recess 19 with a screw 20 in a state in which the flat blade 3 formed on the ridge side thereof is projected to the tip surface 1A of the tool body. Here, as shown in FIG. 2, the direction of the flat blade 3 is parallel or convex with respect to the tool body boss surface 1B.

A wedge 8A is inserted between the side wall of the recess 14 on the rear end side in the rotation direction and the cartridge 13 so that the end face on the narrow side faces the bottom surface side of the recess 14, and The wedge 8A is attached by a clamp screw 7 so as to be movable along a substantially axial direction of the tool body 1.

The ordinary cutting edge 2 is located on the outer peripheral side of the outermost edge of the flat blade 3. This is because, in normal cutting, rough cutting with the normal cutting edge 2 is performed first, and then finish cutting with the flat blade 3 is performed, so that rough cutting and finish cutting are performed once. .

The runout adjustment in the cutter of the present invention is performed by rotating the clamp screw 7 and changing the pushing amount of the wedge 8A into the concave portion 14 so that the cutting depth of the flat blade 3 becomes the optimum value for cutting. It is performed by pushing out the cartridge 13 so as to match. In particular, with respect to the amount of change in the width of the wedge 8A pushed in the recess 14 by the rotation of the clamp screw 7 in the axial direction, as a result, the amount of movement of the cartridge 13 pushed in the same direction in the same direction. Is small, it is possible to finely adjust the pushing amount of the cartridge 13 by rotating the clamp screw 7. In this case, when the clamp screw 7 is rotated in the direction to push in the wedge 8A, the cartridge 13 moves to the right in FIG. 3, and as a result, the flat blade 3 projects in the direction of the tip surface 1A of the tool body and the height of the cutter increases. Get higher

Here, the inclination angle θ of the inclined surface 15 with respect to the tool body front end surface 1A may be appropriately determined according to the tool diameter and the like, but is preferably 5 ° to 30 °. If the angle is less than 5 °, the amount of movement of the width of the cartridge 13 in the axial direction with respect to the amount of change in the width of the wedge 8A pushed into the recess 14 in the axial direction becomes extremely small during the shake adjustment, and the shake adjustment is performed. On the other hand, if it exceeds 30 °, on the other hand, when the shake is adjusted, the movement of the width of the cartridge 13 in the axial direction relative to the amount of change in the width of the wedge 8A pushed into the recess 14 in the axial direction. This is because the amount becomes large and it may be difficult to finely adjust the shake. In the present embodiment, the clearance angle α of the front clearance face which is continuous with the sweeping blade 3 is the same as the inclination angle θ, and the angle β formed by the wedge 8A is 10 °.

On the other hand, FIG. 4 shows a second embodiment of the present invention. In the present embodiment, the inclined surface 15 projects toward the tool body tip surface 1A along the direction opposite to the cutting rotation direction of the tool body 1. Therefore, when the clamp screw 7 is rotated in the direction to push in the wedge 8A, the cartridge 13 moves to the right in FIG. 4, and as a result, the flat blade 3 retracts toward the base end of the tool body 1 and the height of the cutter increases. Will be lower. In this case, in order for the clearance angle α of the front flank to have a predetermined angle, the angle γ formed by the inclined surface 15 and the front clearance surface is not less than the inclination angle θ of the inclined surface 15 with respect to the tool body tip surface 1A. Must be

In the cutter of the present invention, since the recesses 5A and 14 are divided into the outer periphery of the tool body 1 and the tip surface 1A of the tool body, respectively, the tool body 1 is opened by opening these recesses 5A and 14. The decrease in rigidity is less than that of conventional cutters. Further, since the cutting load during finish cutting is received by the entire inclined surface 15 having a relatively large area, the mounting rigidity is higher than that of the conventional cutter, and therefore the stability during cutting is also high.

[0022]

[Effect of the device]

 As described above, in the present invention, the cartridge moves in the longitudinal direction of the inclined surface in accordance with the change amount of the width of the wedge pushed in, and in the axial direction of the tool body in accordance with the inclination of the inclined surface. By reducing the inclination of the inclined surface sufficiently, the movement distance of the cartridge in the axial direction of the tool body with respect to the movement of the cartridge in the longitudinal direction is shortened, and the change in the runout amount of the sweep blade is reduced. I was able to. As a result, it has become possible to easily and accurately adjust the runout of the sweeping blade.

[Brief description of drawings]

FIG. 1 is a plan view of a cutter showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of the cutter showing the direction of the flat blade in the first embodiment of the present invention.

FIG. 3 is a cutter I showing the structure of the first embodiment of the present invention.
It is sectional drawing which followed the II-III line.

FIG. 4 is a partial sectional view of a cutter showing a second embodiment of the present invention.

FIG. 5 is a partial plan view of a cutter showing a conventional example.

FIG. 6 is a partial side view of a cutter showing a conventional example.

FIG. 7 is a partial side view of a conventional cutter showing an example of the structure of a swing-out mechanism of a flat blade.

FIG. 8 is a partial cross-sectional view of a cutter showing an example of the structure of a swing-out mechanism of a flat blade in a conventional cutter.

[Explanation of symbols]

 1 Tool Main Body 1A Tool Main Body Tip Surface 1B Tool Main Body Boss Surface 2 Normal Cutting Blade 3 Flat Blade 4A ・ 4B ・ 11 ・ 16 Chip Pocket 5A ・ 5B ・ 12 ・ 14 Recess 6A ・ 6B Locator 7 Clamp Screw 8 ・ 8A Wedge 9 ・20 Screws 10A and 10B Throw-away tip (chip) 13 Cartridge 15 Inclined surface 17 Slotted hole 18 Tightening screw 19 Mounting recess

Claims (4)

[Scope of utility model registration request] 1. A first concave portion that opens at the tip of the outer peripheral portion of an annular tool body is formed, and a flat plate-shaped first throwaway tip is formed on the ridge side of the first concave portion. A normal cutting edge is mounted toward the tip in the outer peripheral direction, and a second recessed portion that opens to the tip end surface in the axial direction of the tool body is formed, and a flat plate-shaped second throwaway tip is held in this recessed portion. Is attached with its side surface in contact with the bottom surface of the second recess, and a wedge member is inserted between this cartridge and the side wall of the second recess, and The second throwaway tip is mounted in a state in which the flat blade formed on the ridge side thereof is projected to the tip side of the tool body, and the pushing amount of the wedge member with respect to the second concave portion is changed to change the pushing amount. Deflection of cutting edge Is adjusted, the normal cutting edge, in the finishing throw type cutter for the outermost edge of the wiper blade is located on the outer peripheral side, the bottom surface of the second recess is the axis of the tool body. Formed on a surface facing the front end side in the direction, and on this bottom surface, an inclined surface that gradually protrudes toward the front end side in the tool body axial direction from one end of the second concave portion to the other end is formed, and the cartridge is The wedge member is mounted in the second recess in a state of being movable along the inclined surface, and the wedge member is provided between one of the side wall on one end side and the side wall on the other end side of the recess and the cartridge. A throwaway type cutter characterized in that the end face on the narrow side is inserted so as to face the bottom face side of the second recess. 2. The cartridge is mounted in the second recess by a tightening screw screwed in a direction substantially perpendicular to the inclined surface from the tip end side of the tool body. The throwaway cutter according to Item 1. 3. The inclined surface projects toward the tip end side in the axial direction of the tool main body along the cutting rotation direction, and the inclined surface is parallel to a front flank that is continuous with the flat blade. The throwaway cutter according to Item 1. 4. The inclined surface projects toward the tip end side in the axial direction of the tool main body along a direction opposite to the cutting rotation, and the inclined surface and the front flank surface connected to the sweeping blade of the throwaway tip are formed. The throwaway cutter according to claim 1, wherein an angle formed is equal to or larger than an inclination angle of the inclined surface with respect to the tip surface of the tool body.