JPS6036883B2 - Cutting tools - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cutting tool in which a tip having a cutting edge on the periphery is detachably attached to a tool body, and its purpose is to quickly attach the tip to the tip mounting seat with a simple structure. Another object of the present invention is to provide a cutting tool that can be reliably installed and removed.

Hereinafter, each embodiment of the present invention will be described with reference to the drawings.

First, one embodiment of the present invention will be described with reference to FIGS. 1 to 8. FIG. 1 is a plan view of a lathe, in which 1 is a chuck, 2 is a sensor, 3 is a workpiece, and 4 is a tool post, to which a cutting tool 5 is attached. The cutting tool 5 includes a tip mounting seat 6, a tip 7, and a tool body 8, as shown in FIGS. 2 to 5. The chip mounting seat 6 is provided on the upper surface of a head member 9, and the head member 9 is attached to the tip of a shaft member 10 having a predetermined axial length.

A chip mounting pin 11 is provided in a protruding manner approximately at the center of the chip mounting seat 6. The tip 7 has an angular shape in plan view (an equilateral triangle in this embodiment), has a cutting edge on its periphery, and has a mounting hole 12 formed approximately in the center of its lower surface.

The chip 7 is rotatably and removably mounted on the chip mounting seat 6 via a seat 19 with its mounting hole 12 fitted into a chip mounting pin 11. The tool body 8 is a block body having a substantially rectangular shape in plan view, and is configured with a rat insertion hole 13 bored along its length, and a support step 14 provided at one end in the length direction on its upper surface. The support stepped portion 14 includes a podium surface 15a facing upward and a rotation regulating wall surface 15b facing horizontally.

Note that the shaft insertion hole 13 is connected to the rotation regulating wall surface 15b. A shaft member 10 is inserted into the ball insertion hole 13 of the tool body 8 so as to be rotatable and movable in the axial direction. By moving the head member 9 in one direction (direction of arrow A in FIG. 2) along the bag line direction of the ball member 10 relative to the tool body 8, one peripheral edge of the tip 7 is brought into contact with the wall surface 15b. Rotation of the chip 7 about the chip mounting pin 11 is prevented, and the chip 7 is held between the chip mounting pin 11 and the wall surface 15b of the tool body 8 and fixed to the chip mounting seat 6. Furthermore, by moving the head member 9 in the other direction (in the direction of arrow B in FIG. 2) with respect to the tool body 8 along the axial direction of the shaft member 10, the periphery of the tip 7 is spaced apart from the wall surface 15b. Rotation of the chip 7 around the chip mounting pin 11 is allowed. Further, when the lower surface of the head member 9 is in contact with the mounting surface 15a of the support step 14 of the tool body 8, rotation of the head member 9 about the shaft member 10 with respect to the tool body 8 is prevented. . The head member 9 is moved in the other direction (in the direction of arrow B in FIG. 2) relative to the tool body 8 along the axial direction of the shaft member 10, so that the lower end surface of the head member 9 and the support step 14 of the tool body 8 are aligned. War level 1
5a, rotation of the head member 9 about the shaft member 10 with respect to the tool body 8 is allowed.
Further, a tip rotation indexing member 16 used for indexing and rotating the tip 7 is provided at a location other than the tool rest 4 of the lathe. The tip rotation indexing member 16 is used by bringing it close to the tool rest (the tool rest may be brought closer to the cutting material 16) when indexing and rotating the chip 7, and is a block body made of a rectangular parallelepiped. A wall portion 18 is provided protruding from the side surface of the upstream portion at one end in the length direction of 17. The head member 9 is moved in the other direction (arrow in FIG. 2,
A part of the circumference of the chip 7 is brought into contact with the wall portion 18 of the chip rotation indexing member 16, whereby the chip 7 is indexed and rotated at a predetermined angle around the chip mounting pin 11. It is configured as follows.

Next, the case of attaching and removing the tip 7 from the cutting tool 5 will be described with reference to FIGS. 5 to 7.

First, the case where the chip 7 is removed from the chip mounting seat 6 will be described. Normally, the lower surface of the head member 9 having the tip mounting seat 6 on the upper surface is in contact with the mounting surface 15a of the support step 14 of the tool body 8, as shown in FIG. Rotation about 10 is prevented. To remove the tip 7 from this state, move the head member 9 in one direction (direction of arrow C in FIG. 5) along the sea bream line direction of the ball member 10 relative to the tool body 8, and
As shown in the figure, after bringing the lower surface of the head member 9 into a non-contact state with the layered surface 15a of the support stepped portion 14, the head member 9 is moved, for example manually, to the tool body 8 around the shaft member 10.
When the chip 7 is rotated 80 degrees to face downward as shown in FIG. 7, the chip 7 falls off from the chip holder 6 due to gravity.

After removing chip 7 in this way, remove another chip 7.
When attaching the head member 9 to the chip mounting seat 6,
After rotating the tool body 8 by 180 degrees around the ball member 10, the chip 7 is transferred to the chip mounting pin 11 and placed on the chip mounting seat 6, and the head member 9 is rotated along the axial direction. direction (direction of arrow D in FIG. 5), the lower end surface of the head member 9 is brought into contact with the layered surface 15a of the support step 14 of the tool body 8 to prevent rotation of the head member 9, and the tool body The chip 7 may be fixed to the chip mounting seat 6 by sandwiching the chip 7 between the wall surface 15b of the chip 8 and the chip mounting pin 11. Next, the cutting blade exchanging operation of the tip 7 will be explained with reference to FIGS. 8A to 8D. In this case, the tip rotation indexing member 16 is placed in advance on the tool rest 4.
Keep it close to. First, from the initial state, that is, the state where one peripheral edge of the tip 7 is in contact with the wall surface 15b of the tool body 8 as shown in FIG. One direction (direction of arrow E in Figure 8)
As the tip 7 is moved, the periphery of the tip 7 is spaced apart from the wall surface 15b of the tool body 8, and the tip 7 becomes rotatable on the upper surface of the tip support seat 6. After this state, when the head member 9 is still moved in the direction of the arrow E along the marking line of the shaft member 10 with respect to the tool body 8, one corner portion of the tip 7 is moved against the wall of the tip rotation indexing member 16. The chip 7 is attached to the chip mounting pin 11 as shown in FIG.
The chip 7 begins to rotate counterclockwise in FIG. 8 around , and is rotated until one peripheral edge of the chip 7 becomes parallel to the wall 18 of the chip rotation indexing section 16.

After this, the head member 9 is attached to the tool body 8 at the Kabemura 10.
When the tip 7 is further moved in the direction of the arrow B along the line, the tip 7 is further rotated in the opposite direction, resulting in the state shown in FIG. 8C. (Even in this state, the lower surface of the head member 9 having the chip mounting seat 6 on the upper surface is in contact with the multilayer surface 15a of the support step 14.) The chip 7 is in the state shown in FIG. 8C above. After rotating, the head member 9 is moved in the other direction (eighth direction) along the axial direction of the shaft member 10 with respect to the tool body 8.
When the tip 7 is moved in the direction of arrow F in the figure, one corner of the tip 7 comes into contact with the wall surface 15b of the tool body 8, as shown in FIG. 8D.

After this, when the head member 9 is moved in the direction of arrow F along the marquee line of the shaft member 10 relative to the tool body 8, the tip 7 rotates counterclockwise around the tip mounting pin 11. One circumferential edge of the tool body 8 is brought into close contact with the wall surface 15b of the tool body 8, and the state shown in FIG. 8A is reached again, and rotation of the tip 7 on the upper surface of the tip mounting seat 6 becomes impossible. In this manner, the first cutting blade exchanging operation of the tip 7 is completed.

Tip 7 during one cutting blade exchange operation in this example
The rotational index angle is 120 degrees because the chip 7 is a substantially equilateral triangle in plan view. Next, a second embodiment of the present invention will be described with reference to FIGS. 9 and 10.

In this embodiment, the same components as those in the embodiment shown in FIGS. 1 to 8 described above are denoted by the same reference numerals, and the explanation thereof will be omitted. In this embodiment, the tip 7 is approximately square in plan view and the wall surface 1 of the tool body 8.
This embodiment differs from the embodiment shown in FIGS. 1 to 8 in that 5b has two surfaces that are perpendicular to each other. When the two sides of the chip 7 abut against the wall surfaces 15b, 15b of the tool body 8, rotation of the chip 7 about the chip mounting pin 11 is prevented, and the two sides of the chip 7 contact the wall surfaces 15b, 15b. When separated further apart, the chip 7 is allowed to rotate around the chip mounting pin 11. Note that the mounting and removing operations of the chip 7 in this embodiment are similar to those in the embodiment shown in FIGS. 1 to 8 described above. Also, regarding the cutting blade exchange operation of the tip 7, the rotation index angle of the tip 7 during each cutting blade exchange is 90 degrees.
Since this embodiment is the same as the embodiment described above except for the above points, a detailed explanation thereof will be omitted.

As described above, according to the cutting tool of the present invention, the head member having the chip mounting seat is provided in the tool body so as to be movable along the substantially horizontal axis, and when the head member is separated from the tool body, the head member is movable along the axis. The chip mounting seat can be rotated in the center until it faces downward, and the chip is held between the chip mounting pin provided protruding from the chip mounting seat and the rotation regulating wall surface of the tool body, and the chip is placed in the chip mounting seat. Since the head member is configured to be fixed, by rotating the head member until the tip mounting seat faces downward, the chip can be removed from the chip mounting seat by gravity, and the head member can be removed in the direction in which it approaches the tool body. The tip can be attached to the tip attachment seat by moving the tip to the tip and fixing the tip between the tip attachment pin and the tool body.

Therefore, although the structure is simple, the chip can be quickly and reliably attached to and removed from the chip mounting seat.

[Brief explanation of the drawing]

Fig. 1 is a schematic plan view of a lathe equipped with a cutting tool according to an embodiment of the present invention, Fig. 2 is an enlarged plan view of a circular portion of Fig. 1, and Fig. 3 is a low D line of Fig. 2. Fig. 4 is a view taken along line mm in Fig. 2, Fig. 5 is a vertical side view taken along line W-W in Fig. 2, and Figs. FIGS. 8A to 8D are plan views of essential parts showing the cutting edge changing operation of the insert, FIG. 9 is a plan view showing the second embodiment of the present invention, and FIGS. 10A to 10 D is a plan view of the main part showing the cutting blade exchanging operation of the same tip. 5...Cutting tool, 6...Chip mounting seat, 7
...Tip, 8...Tool body, 9...
...Head member, 10...Shaft member, 11.
...Chip mounting pin, 12...Mounting hole,
14...Support step portion, 15a...War layer surface, 15b...Rotation regulating wall surface. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 8 Figure 9 Figure 10 Figure 10

Claims (1)

[Claims] 1. A tool body in which a support stepped portion having an upwardly facing mounting surface and a horizontally facing rotation regulating wall surface is formed at one end of the upper surface, and a chip mounting seat on the upper surface, which is slidable on the aforementioned mounting surface. a head member placed on the tool body, and a head member provided rotatably and movably in the axial direction within the tool body with an axis parallel to the mounting surface, and a distal end protruding from the support step portion fixed to the head member a shaft member protruding from the chip mounting seat, into which a mounting hole for a chip placed on the chip mounting seat is loosely fitted, and the chip is clamped and fixed by the rotation regulating wall surface; A cutting tool characterized by comprising a mounting pin.