JPS5815241B2 - Cutting tool blade changing device - Google Patents

Description

[Detailed Description of the Invention] The present invention provides a tip with a planar square shape (throw-away tip) in which the tip mounting seat of the tip mounting body has a cutting edge at the cutting edge.
The present invention relates to a cutting blade changing device for a cutting tool in which the cutting tool is rotatably attached and the cutting blade is changed by rotating the tip by a predetermined angle.

In the above-mentioned cutting tools, it is necessary to fix the insert in a non-rotatable manner to the insert mounting seat after the specified cutting blade replacement operation is completed, but in this case, conventionally, the insert is attached using an eccentric shaft. The chip is clamped between the walls of the seat and fixed in a non-rotatable manner, or the chip is fixed in a non-rotatable manner using a lever such as a shaft or lever.

All of these tools require tightening tools such as wrenches and spanners, and this work also relies on human power.Also, when the cutting blade becomes worn out, the work of replacing the cutting blade also relies on human power. In recent years, this has become a major obstacle in efforts to automate machines, reduce production costs, and save labor.

Conventionally, in order to solve this problem, a notch or the like is provided in a part of the hole of the chip, the relative movement of the chip and the support pin is stopped by the notch, and a ring-shaped ratchet gear or the like is used to prevent the chip from moving between the chip and the support pin. It is known that the cutting blade is exchanged by rotating the cutting edge while moving up and down at the same time, and in conjunction with the above-mentioned vertical movement, one side of the tip is pressed against a support pin with a wedge to fix the tip so that it cannot rotate. ing.

Such conventional devices are difficult to put into practical use because the chip is special and the manufacturing process is troublesome, and the mechanism is also very complicated.

The present invention has been made in view of the above-mentioned circumstances, and provides a cutting tool cutting blade changing device that can automatically perform the cutting blade changing work of the chip and the work of fixing the chip to the chip mounting chamber with a simple structure. The purpose is to

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 shows the plane of the lathe, in which 1 is a chuck, 2 is a center, 3 is a workpiece, and 4 is a tool rest. A cutting tool 5 on which cutting is performed is attached.

The cutting tool 5 includes a tip mounting member 6, a tip 7, and a tip rotation regulating member 8, as shown in FIGS. 2 to 5.

The chip mounting member 6 has a head member 11 having a chip mounting seat 10 on its upper surface fixed to the tip of a shaft 9 on a predetermined axis, and a chip mounting pin 12 protruding from the approximate center of the chip mounting seat 10. It is configured.

The tip 7 has an angular planar shape (in this embodiment, an equilateral triangle), has a cutting edge on its peripheral edge, and has a mounting hole 13 formed approximately in the center of its lower surface.

The chip 7 is rotatably and detachably mounted on the chip mounting seat 10 by loosely fitting the chip mounting pin 12 into the mounting hole 13 thereof.

The chip rotation regulating member 8 is a block body having a substantially rectangular planar shape, and has a shaft insertion hole 14 bored along its length, and a support step 15 at one end in the length direction. An inclined wall surface 16 is provided above the stepped portion 15.

The shaft 9 of the chip mounting member 6 is inserted into the shaft insertion hole 14 of the chip rotation regulating member 8 so as to be movable in the axial direction and the circumferential direction.

The tip mounting member 6 is aligned with the axis 9 relative to the tip rotation regulating member 8.
The rotation of the chip 1 with respect to the chip mounting seat 10 is prevented by placing the chip 7 at the limit point of movement in one direction (rightward in FIG. thwarted.

Furthermore, by moving the chip mounting member 6 in the other direction (to the left in FIG. Rotation of the chip 1 with respect to the chip mounting seat 10 is allowed.

Furthermore, the lower surface of the head member 11 of the chip attachment member 6 is
When the chip rotation regulating member 8 is in contact with the upper surface of the support stepped portion 15, rotation of the chip mounting member 6 about the axis 9 with respect to the chip rotation regulating member 8 is prevented.

The tip mounting member 6 is aligned with the axis 9 relative to the tip rotation regulating member 8.
The lower surface of the chip mounting member 6 and the upper surface of the support step 15 of the chip rotation regulating member 8 are placed in a non-contact state. When , rotation of the chip mounting member 6 about the axis 9 with respect to the chip rotation regulating member 8 is allowed.

The cutting tool is constructed as described above.

A tip rotation indexing member 11 is provided near the cutting tool at a location other than the tool rest 4 of the lathe.

The chip rotation indexing member 17 is constructed by protruding wall surfaces 19 from the upper and side surfaces of a block body 18 in the length direction.

When the tool rest 4 is moved to the right in FIG. 1, the periphery of the tip γ cannot come into contact with this wall surface 19, and when the tool rest 4 is moved to the left in FIG. It is now possible to come into contact with it.

With the peripheral edge of the chip γ in contact with the wall surface 19 of the chip rotation indexing member 11, the chip mounting member 6 is moved in the other direction along the axis of the shaft 9 with respect to the chip rotation regulating member 8 (left side in FIG. When the chip 7 is moved by a predetermined stroke in the direction of Rotate by a predetermined index angle.

Next, Fig. 8A-D shows the cutting blade exchange operation of the cutting tool.
Explain with reference to.

First, from the initial state, that is, the state where one peripheral edge of the nap 1 is in contact with the wall surface 16 of the rotation regulating member 8 as shown in FIG. 8A,
The tip mounting member 6 is aligned with the axis 9 relative to the tip rotation regulating member 8.
As the chip 10 is moved in one direction (upward in FIG. 8) along the axis, the periphery of the chip 10 is spaced apart from the wall surface 16 of the chip rotation regulating member 8, and the chip γ is moved on the upper surface of the chip mounting seat 10. , the state becomes rotatable.

After this state, if the chip mounting member 6 is still moved in one direction along the thin line of the shaft 9 relative to the chip rotation regulating member 6, one corner of the chip γ will be attached to the wall surface of the chip rotation indexing member 11. 19, the tip 7 rotates by a predetermined angle in the counterclockwise direction in FIG. 8 about the mounting pin 12 as shown in FIG. It becomes parallel state.

Thereafter, when the tip mounting member 6 is moved in one direction along the axis of the shaft 9 with respect to the tip rotation regulating member 8, the tip γ further rotates counterclockwise to reach the state shown in FIG. 8C. (Also in this state, the lower surface of the head member 11 of the tick attachment member 6 is in contact with the upper surface of the support step 15.

). After the tip 7 has rotated to the state shown in FIG. 8C above,
The tip mounting member 6 is aligned with the axis 9 relative to the tip rotation regulating member 8.
When the tip is moved in the curved direction (downward in FIG. 8) along the axial direction of the tip, one corner of the tip γ comes into contact with the wall surface 16 of the tip rotation regulating member 8, as shown in FIG.

After this, the chip mounting member 6 is still attached to the chip rotation regulating member 8.
When the chip γ is moved in the direction along the axial direction of the shaft 9, the chip γ rotates counterclockwise around the mounting pin 12, and one peripheral edge of the chip γ comes into close contact with the wall surface 16 of the chip rotation regulating member 8. Then, the state shown in FIG. 8A is reached again, and rotation of the chip 7 on the upper surface of the chip handling wall 10 becomes impossible.

In this manner, the first cutting blade exchanging operation of the tip 7 is completed.

Tip T during one cutting blade exchange operation in this example
The rotation index angle is 120 degrees because the chip 7 has a planar triangular shape.

Next, the fifth step is performed for the removal operation of the tip 7 of the cutting tool 5.
This will be explained with reference to FIGS. 7 to 7.

Normally, the lower surface of the head member 11 of the chip mounting member 6 is in contact with the upper surface of the support step 15 of the chip rotation regulating member 8, as shown in FIG. rotation is prevented.

To remove the chip 7 from this state, move the chip mounting member 6 in one direction (leftward in FIG. 5) along the axial direction of the shaft 9 relative to the chip rotation regulating member 8 to the sixth As shown in the figure, after bringing the lower end of the head member 11 into a non-contact state with the upper surface of the support step 15, the tip mounting member 6
When the chip 1 is rotated 180 degrees about the shaft 9 with respect to the chip rotation regulating member 8 and the chip 7 is directed downward as shown in FIG. 7, the chip 1 falls off from the chip mounting seat 10 due to gravity.

As described above, the chip 7 can be automatically removed from the chip mounting seat 10.

After being removed in this way, the chip mounting member 6 is rotated 180 degrees about the shaft 9 with respect to the chip rotation regulating member 8, and then the chip mounting member 6 is moved in the direction (first direction) along the axial direction of the shaft 9. 5) to the movement limit point, and the lower surface of the head member 11 is moved to the support step 15 of the chip rotation regulating member 8.
The chip 7 may be mounted on the chip mounting seat 10 in contact with the upper surface of the chip 7.

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.

This embodiment differs from the embodiment shown in FIGS. 1 to 8 in that the chip 1 is made into a square plane and the wall surface 16 of the chip rotation regulating member 8 is made into two mutually perpendicular surfaces.

Then, when the two sides on both sides of the chip 7 sandwiching one corner come into contact with the two wall surfaces 16, 16 of the chip rotation regulating member 8, the rotation of the chip 7 with respect to the chip mounting seat 10 is prevented, and When the two sides of the chip 1 are separated from the wall surface 16, 16, rotation of the chip 7 relative to the chip mounting seat 10 is allowed.

In addition, the cutting edge exchange operation of the tip γ in this example is 1
The indexing angle is 9 for 10 revolutions of the insert when changing the cutting blade per time.
Except for the point of 0 degrees, this embodiment is the same as the embodiment shown in FIGS. 1 to 8 described above, so a detailed explanation thereof will be omitted.

Next, a third embodiment of the present invention will be described with reference to FIGS. 11 to 14.

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 mounting member 6a has the same shape as the tip rotation regulating member 8 in the embodiment shown in FIGS. 1 to 8 above, and the tip of the tip rotation regulating member 8a has a wall surface 16a. The chip rotation regulating member 8a is installed in a mounting hole 20 provided in the chip mounting member 6a so as to be movable in the left-right direction in FIG. This differs from the embodiment shown in FIGS. 1 to 8 in that the movable side is used and the cutting tool 5 is placed on the fixed side.

The cutting blade exchanging operation of the tip 7 is first performed in an initial state, that is, as shown in FIG. Located at the mid-upward movement limit point,
From the state where the wall surface 16a is in contact with one circumferential edge of the chip 7, the chip rotation regulating member 8a is moved relative to the chip mounting member 6a to the downward movement limit point in FIG.
are spaced apart from the periphery of the chip 7 to make the chip 7 rotatable with respect to the chip mounting seat 10.

Next, when the chip rotation indexing member 17 is moved downward in FIG. Rotate a predetermined angle counterclockwise to the position shown in Fig. 14B.
As shown in FIG. 2, one corner edge of the chip becomes parallel to the wall surface 19 of the chip rotation indexing member 17.

After this state, when the tip rotation indexing member 17 is further moved downward, the tip 7 is further rotated counterclockwise by a predetermined angle as shown in FIG. 14C.

After this state, the tip rotation indexing member 17 is moved to the 14th position.
After moving upward in the figure and returning to the initial position shown in FIG. 14A, when the tip rotation regulating member 8a is moved upward in FIG. 14, the wall surface 16a of the tip rotation regulating member 8a
Then, one corner of the chip 7 abuts as shown in Figure 14.

After the contact, the tip 7 is further rotated counterclockwise by moving the tip rotation regulating member 8a upward, and when the tip rotation regulating member 8a reaches the upward movement limit point, the tip 7 is rotated counterclockwise. One peripheral edge of the chip 1 comes into contact with the wall surface 16a of the chip rotation regulating member 8a, and the state is again similar to the initial state shown in FIG. 14A, and the chip 1 becomes unable to rotate relative to the chip mounting seat 10.

In this manner, the first cutting blade replacement is completed.

Next, a fourth embodiment of the present invention will be described with reference to FIGS. 15 and 16.

This embodiment differs from the embodiment shown in FIGS. 11 to 14 in that the upper surface of the membrane attachment hole 20 is opened to expose the chip rotation regulating member 8a to the chip mounting member 6a. 11
This embodiment is different from the embodiment shown in FIGS. 11 to 14, and the pond points are the same as the embodiment shown in FIGS. Omitted.

Next, a fifth embodiment of the present invention will be described with reference to FIGS. 17 and 18.

This embodiment differs from the embodiments shown in FIGS. 1 to 8 only in that elastic force is imparted to the wall surface 19 by providing a cutout groove 21 in the block body 18 of the chip rotation indexing member 17. Since the other configurations are the same as those of the embodiment shown in FIGS. 1 to 8, the same parts in the drawings are designated by the same reference numerals and the explanation thereof will be omitted.

Next, a sixth embodiment of the present invention will be described with reference to FIGS. 19 and 20.

In this embodiment, the chip rotation indexing member 17 is constituted by a rod 22 that penetrates the wall surface 19 at one end, and the other end of the rod 22 is rotatably connected to the upper surface of a base 24 by a shaft 23. The embodiment shown in FIGS. 1 to 8 has the advantage that elastic force is applied to the wall surface 16 by a spring 26 interposed between one end of the rod 22 and a spring support 25 protruding from the upper surface of the base 24. Since the structure of the pond is the same as that of the embodiment shown in FIGS. 1 to 8, the same parts in the drawings are denoted by the same reference numerals and the explanation thereof will be omitted.

Note that 21 in FIGS. 19 and 20 is a stopper pin, which restricts the rod 22 from rotating more than necessary due to the elastic force of the spring 26.

Next, a seventh embodiment of the present invention will be described with reference to FIGS. 21 and 22.

In this embodiment, a cleaning fluid inflow path 2 is provided inside the block body 18 of the tip rotation indexing member 17, and one end thereof is connected to a cleaning fluid supply source (not shown) via a connecting hose 28.
9 and a plurality of nozzles 30 with one end communicating with the inflow path 29 are provided on one side of the block body 18,
The point shown in FIGS. 1 to 8 is that cutting debris and the like attached to the tip 1 can be removed by spraying cleaning fluid such as liquid or gas toward the tip 1 from the nozzle 30.
Unlike the embodiment shown in the drawings, the structure of the song is the same as the embodiment shown in FIGS. 1 to 8, so the same parts in the drawings will be given the same reference numerals and their explanation will be omitted.

As described above, the cutting tool cutting blade changing device of the present invention includes a chip mounting member having a chip mounting seat, a chip mounting member that is rotatably attached to the chip mounting seat of the chip mounting member with its central portion as a fulcrum, and has a planar angular shape. A chip having an eggplant and a cutting edge on a peripheral edge thereof is assembled with the chip mounting member so as to be movable relative to each other, and when the chip is moved in one direction, it comes into contact with the peripheral edge of the chip to prevent rotation of the chip; a chip rotation regulating member having a wall spaced apart from the peripheral edge of the chip and in contact with the peripheral edge of the chip to allow rotation of the chip when moving in the direction; a wall surface that comes into contact with and separates from the periphery of the chip so that the periphery of the chip can come into contact with it when moving in one direction, and cannot come into contact with it when it moves in the other direction. a chip rotation indexing member having a chip rotation indexing member, and by bringing the peripheral edge of the chip into contact with the wall surface of the chip rotation indexing member while being spaced apart from the wall surface of the chip rotation regulating member, the chip is rotated at a predetermined rotation index angle. The cutting blade is replaced by rotating the cutting blade, and after the cutting blade is replaced, the peripheral edge of the chip is separated from the board surface of the chip rotation indexing member and brought into contact with the wall surface of the chip rotation regulating member, so that the chip is attached to the chip mounting seat. Since it is configured to be fixed in a non-rotatable manner to the tip, it is possible to automate the cutting edge replacement work of the chip and the work of fixing the chip to the chip holding seat smoothly and reliably without having to have a complicated configuration. It is possible to save labor and improve the efficiency of cutting work associated with this.

[Brief explanation of the drawing]

Fig. 1 is a schematic plan view of a lathe equipped with a cutting tool cutting edge changing device according to an embodiment of the present invention, Fig. 2 is an enlarged plan view of the part inside ■ in Fig. 1, and Fig. 3 is a ■-■ line arrow view of the figure,
Figure 4 is a view from the ■-■ line in Figure 2, and Figure 5 is an I in Figure 2.
A vertical side view taken along the line V-IV, FIGS. 6 and 1 are vertical side views of main parts showing the chip removal operation, and FIGS. 8A-D.
9 is a plan view of the main part showing the cutting blade changing operation of the insert, FIG. 9 is a plan view showing the second embodiment of the present invention, and FIGS. 10A to 10D are the main parts showing the cutting blade changing operation of the same insert. A plan view, FIG. 11 is a plan view showing a third embodiment of the present invention, FIG. 12 is a view taken along the line V-V in FIG. 11, and FIG. 13 is a longitudinal section taken along the line VI-VI in FIG. A side view, FIGS. 14A to 14D are plan views of essential parts showing the cutting blade exchange operation of the same insert, FIG. 15 is a plan view showing the fourth embodiment of the present invention, and FIG. 16 is a Fig. 17 is a plan view showing the fifth embodiment of the present invention, Fig. 18 is a longitudinal side view taken along line -■ of Fig. 17, and Fig. 19 is a longitudinal sectional side view of the present invention. Plan view showing the sixth embodiment, No. 20
The figure is a view taken along line IX-X in FIG. 19, FIG. 21 is a plan view showing the seventh embodiment of the present invention, and FIG.
It is a line arrow view. 5... Cutting tool, 6... Chip mounting member, 7... Chip, 8... Chip rotation regulating member, 10... Chip Mounting seat, 16...
... Wall surface of chip rotation regulating member, 11 ... Chip rotation indexing member, 19 ... Wall surface of chip rotation indexing member.

Claims (1)

[Claims] 1. A chip mounting member having a chip mounting seat, and a chip that is rotatably attached to the chip mounting seat of the chip mounting member with its center part as a fulcrum, has an angular planar shape, and has a cutting edge on its peripheral edge. , which is assembled movably relative to the tip mounting member, and when moving in one direction, comes into contact with the periphery of the tip to prevent rotation of the tip, and when moving in the direction, contacts the periphery of the tip. a chip rotation regulating member having a wall surface that comes into contact with and away from the peripheral edge of the chip so as to be spaced apart from each other to allow rotation of the chip; and a chip rotation regulating member that moves linearly relative to the mounting member and when the chip moves in one direction. a chip rotation indexing member having a wall surface that comes into contact with and separates from the periphery of the chip so that the periphery of the chip can come into contact with the chip and the periphery of the chip cannot come into contact with it when moving in the direction of the pond; By bringing the periphery of the chip into contact with the wall surface of the chip rotation indexing member with the periphery of the chip spaced apart from the wall surface of the chip rotation regulating member, the chip is rotated by a predetermined rotation index angle to exchange the cutting blade. After replacement, the peripheral edge of the chip is separated from the wall surface of the chip rotation indexing member and brought into contact with the wall surface of the chip rotation regulating member, thereby fixing the chip unrotatably to the chip mounting seat. A cutting tool cutting blade changing device characterized by the following.