JPS61252003A - Chuck claw self-cutting device - Google Patents

Abstract

PURPOSE:To permit high precision and non-attended machining of a work by automatizing mounting/demounting of a reference ring for self-cutting to a chuck through a turret tool post. CONSTITUTION:By moving a turret tool post 4, a ring transfer device is positioned at the place of a ring housing device 3 and at the same time, a reference ring 26 for self-cutting is received from the device 3 by a spring collet 42 of the turret tool post 4. Next, the turret tool post 4 is moved and the ring 26 is held by the chuck 44 of a headstock 2. Keeping this condition, cuttings of section h of a claw 44 are completed by a cutter 43 for self-cutting. Then a series of self-cutting action is terminated by extracting the ring 26 with the spring collet 42 and returning the ring to the original position.

Description

DETAILED DESCRIPTION OF THE INVENTION <Field of industrial application> The present invention relates to a chuck jaw self-cutting device for cutting a chuck jaw of an NC lathe or the like to a required size.

<Conventional technology> Conventionally, when attempting to unattend NC lathe work.

The replacement of cutting tools is handled by A, T, C (automatic tool changer), and the replacement of chuck jaws is handled by A, J, C (automatic chuck jaw changer).

The exchange errors made for these exchanges are A, T, and C.

For A, J, and C, the position of the cutting tool can be corrected using an automatic workpiece measurement and correction device.

There is no effective correction method. Poor precision due to exchange errors of A, J, C, especially poor swing precision has a direct negative effect on the precision of the machined workpiece.

Therefore, it cannot be used for products that require high precision, so it is necessary to attach a free jaw to the chuck and self-cut the free jaw to the same size as the diameter of the gripping part of the workpiece.
ing.

<Problems to be Solved by the Invention> Self-cutting of the chuck jaws is performed using a self-cutting tool by gripping the reference ring in advance on the chuck and then rotating the chuck. was done manually. For this reason, there are problems in that the reference ring must be frequently attached and detached when many types of workpieces with different diameters are processed with high precision, and that it is difficult to configure an unmanned line.

The present invention solves the above-mentioned problems, and provides a chuck jaw self-cutting device that automates the attachment and detachment of a reference ring for self-cutting and enables unmanned machining of high-precision workpieces. The purpose is to provide cutting equipment.

The structure of the chuck jaw self-cutting device according to the present invention to achieve this object is that
a ring storage device that stores a reference ring for self-cutting; a turret tool rest that is movable between the headstock and the ring storage device; and a turret tool rest that is attached to the #-marked turret tool rest and is connected to the ring storage device. and a ring delivery device that transfers the reference ring between the chuck of the headstock and the chuck of the headstock. I.J.
At the same time, the ring transfer device receives the reference ring for self-cutting from the ring storage device t, and then moves the turret tool post to position the ring transfer device to the headstock. Then, the reference ring is gripped by the chuck of the spindle piece. With the chuck gripping the reference ring, the chuck jaws of the chuck are self-cut using the self-cutting tool attached to the turret tool post. After machining, the ring delivery device of the turret tool post is used again to remove the reference ring. Receive the ring from the chuck and store it in the original ring storage device.

Embodiment Examples Hereinafter, embodiments of the present invention will be explained in detail with reference to the drawings.

Figure 1 is a plan view of a lathe equipped with a chuck jaw self-cutting device according to the first embodiment of the present invention, and Figure 2 is a side view of the lathe.
Figure 3 is a cross-sectional view taken along the line ■--in Figure 2, Figure 4 is a cross-sectional view taken along the line ■-■ in Figure 3, Figure 5 is a v-v cross-sectional view in Figure 3, and Figure 6 is a cross-sectional view along the line ■--■ in Figure 3. 3 is a WM sectional view, FIG. 7 is an explanatory diagram of the reference ring delivery state between the ring storage device and the turret turret, and FIG.
The figure is an explanatory diagram of the reference ring transfer state between the chuck and the turret tool rest.

FIG. 9 is an explanatory diagram of the self-cutting state of the chuck claw.

As shown in FIGS. 1 and 2, on the bed 1 there is a headstock 2, a ring storage device 3. and X in the horizontal plane in the middle of the original,
A turret tool rest 4 mounted on a slide that can reciprocate in the Z direction is provided. A spindle 5 is rotatably supported on the headstock 2, and a chuck 6 is fixed to one end of the spindle 5.
At the same time, a main shaft driving pulley 7 is fixed to the other end.
The main shaft 5 is connected to a drive motor l (not shown) via its pulley 7.
It is 6ζ so that it can be driven to rotate.

The turret tool rest 4 is rotatably supported by the tool rest main body 8, and the turret tool rest 40 can be indexed and positioned by a drive and positioning mechanism built into the tool rest main body 8.

The turret main body 8 is fixed on the slide 9, and the slide 9 is fixed on the saddle 10 by sliding surfaces that fit together.
The slide 9 is reciprocally driven in the X direction by the feed motor 11 via the feed screw 12J, and the saddle lO is slidably mounted on the bed l. The saddle is mounted so as to be slidable in two directions perpendicular to the X direction and d, and is reciprocated in the Z direction by a saddle l0Fi feed motor 13 via a feed screw 14.

On the other hand, as shown in FIG.
5 is fixed on the bed 1 in parallel with and adjacent to the headstock 2, and a shaft 17 is rotatably supported on the main body 15 parallel to the main shaft 5 via a bearing 16. An index plate 18 is fixed to one end of the shaft 17 with bolts, and a positioning cam 19 with a plurality of notched grooves equally spaced on the circumferential surface is mounted on the other end of the shaft 17 with a key. It is fixed. Also 1
An indexing drive source 20 such as a fluid pressure motor such as a hydraulic or pneumatic motor or a mineral electric motor is fixed to the main body 15, and this output shaft is connected to the rear end of the shaft 17 by a sleeve 21 and a key 22. connected. on the other hand.

A cylinder chamber 2 is provided in the main body 15 around the outer periphery of the positioning cam 19.
3 is formed with a positioning pin that has a piston part there. /24 is attached to the positioning cam 19 so as to be slidable in the direction toward and away from the positioning cam 19. The cylinder chamber 23 is provided with supply ports for supplying fluid pressure such as hydraulic pressure or pneumatic pressure to the upper and lower sides of the piston portion. 24 is adapted to reciprocate. When the positioning pin 24 approaches the positioning cam 19, it fits into the notch groove of the positioning cam 19 to fix the rotational position of the positioning cam 190, and when it moves to the opposite side, it comes out of the notch groove and closes the positioning cam 19. Allow @ rotation.

On the circumference of the indexing plate 18, the same number of ring gripping devices 25 are provided for the notched grooves of the positioning cam 19.
, the reference ring 26 for self-cutting is attached to the ring gripping device.
25 have the same configuration, so one of them will now be explained. As shown in FIGS. 3 to 6, a shaft 27 is fixed to the index plate 18 by a bolt, and a 7-rank portion is formed at the tip of the shaft 27. There are cut grooves at three locations equally spaced in the circumferential direction. A gripping claw 29 (by a pin 28) is swingably supported in the cut groove.
The pin 30 that abuts the reference ring 26 is screwed in the radial direction and fixed by the screw 31, while the gripping claw 29 is disposed at its proximal end and is secured by a spring 32. The reference ring 26 is gripped by the bolt 30 by the spring force of the spring 32, with its tip side biased toward the center. The amount of protrusion from the gripping claw 29 of this pole) 30 is 8.9
By adjusting the diameter of the reference ring 26, it is possible to adjust the diameter and centering of the reference ring 26. On the other hand, a sleeve 33 is attached to the base of the shaft 270 so as to be freely slidable in the axial direction, and is normally indexed by a spring 34.
8 and n. Also, on the rear surface of the sleeve 33, there are 3
The guide pin 35 of the book is screwed in and fixed, and this guide pin 35 is slidably inserted into a hole bored in the index plate 18 and penetrates to the rear surface, and has a pin 3 at the tip.
6] the pressure plate 37 is fixed.

An inclined surface is formed on the outer periphery of the proximal end of the gripping claw 29, and an inclined surface that fits with the inner periphery of the distal end of the sleeve 33 is formed. 33 is the spring 34
When pushed toward the tip side against the spring 32, the inclined surfaces thereof engage and push down the proximal end side of the gripping claw 29 toward the center against the spring 32, thereby causing the gripping claw and the tip of the gripping claw 29 to The sides open outward to release the reference ring 26. Further, at a predetermined delivery position of the ring gripping bag ff25, a fluid pressure cylinder 38 is fixed to the main body 15 at a position T facing the pressure plate 37, and hydraulic or pneumatic pressure is supplied to the cylinder 38. When the piston mid 398 is protruded, the piston mid 39 is moved by the spring 34 as shown in FIG.
The pressure plate 37 is pushed out against the pressure.

A base 40 is fixed with bolts to a fixed station of the turret turret 4, and a holder 41 is installed there.
ing. A spring collet 42, which is a ring delivery device, is attached to the holder 41. The spring collet 42 has a cylindrical shape with a plurality of slits formed along the axial direction at the tip, and when the tip is inserted into the center hole of the reference ring 26, it is activated by its own resiliency force. The reference puffer 268 is gripped by pressing the inner peripheral surface of the center hole.

The center holes of the plurality of reference rings 26 held by each ring holding device 25 have the same diameter a, so that they can be handled by one spring collet 42. moreover.

A self-cutting tool 43 is attached to another station of the turret tool rest 4.

Next, I will explain one effect. First, the index plate 18 is rotated by the drive source 20 so that the index plate 18 is
The designated reference ring 2G gripped by the arranged ring gripping device 25 is positioned at a predetermined delivery position, and the positioning pin 24 is inserted into the notch groove of the positioning cam 19 to perform index positioning. . On the other hand, the turret tool rest 4, which is waiting in advance at the origin of the X-axis and Z-axis, also has a spring collet 4.
Indexing and positioning is performed so that the reference ring 26 is positioned coaxially with the reference ring 26 that accommodates the predetermined delivery position RI.

Subsequently, as shown in FIG. 7, the turret tool rest 4 is moved in the z direction by the feed motor 13, and the spring collet 42 is inserted into the center hole of the reference ring 26. Therefore, the reference ring 26 is gripped n
At the same time, the cylinder 38 is operated to push out the pressure plate 37i by the piston rod 39, and the grip of the reference ring 26 by the grip claw 29 is released. Thereafter, the turret tool post 4 is moved back in the 6z direction while the spring collet 42 grips the reference ring 26 to a position where the reference ring 26 does not interfere with the gripping claws 29 and the chuck claws 44 of the chuck 6, and then the spring collet 42 The turret tool rest 4 is indexed and positioned so that it faces the chuck 6 side. Then, the feed motor III is moved in the X direction until the center of the reference ring 26 held by the spring collet 42 is located coaxially with the chuck 6, and then moved in the θZ direction. The reference ring 26 is inserted into the center of the chuck claw 44 in the unclamped state. Next, as shown in FIG. 8, the chuck jaws 44 of the chuck 6 are operated to
Grip the reference ring 26 with
Move back in the Z direction.

Subsequently, after indexing and positioning the turret tool rest 4 so that the self-cutting tool 43 faces the chuck 6 side, the ninth
As shown in FIG. 1, the chuck 6 is rotated and the turret tool rest 4 is moved in the Z and X directions required for self-cutting to cut the h section of the chuck jaw 44.

Cutting is completed. ! :, the turret tool rest 48 is moved back in the Z direction, indexed and positioned so that the spring collet 42 faces the chuck 6 side, and the turret tool rest 4 is moved to move the spring collet 42 towards the chuck 6 (
! : Position the spring collet 42 on the same axis, move it roughly in the ezZ direction, and insert the spring collet 42 into the center hole of the reference ring 26 held in the chuck 6, and then grip it f'L. Thereafter, the chuck jaws 44 of the chuck 6 are opened to release the grip of the reference ring 26 by the chuck jaws 44, and the reference ring 26 holding the turret tool rest 4 by the spring collet 42 is moved between the chuck jaws 44 and the gripping jaws 29. After retreating in two directions to t so as not to interfere with the And spring collet 4
The turret tool rest 4 is indexed and positioned so that the reference ring 2 is at the delivery position of the reference ring 26.

Turret tool rest 4 'P, e Reference ring 268 moved in the Z direction and held by the spring collet 42
Insert it into the center of the gripping claw 29 that opens. After that, the cylinder 38 is actuated to retract the piston rod 39, and the button plate 37 is also moved backward by the spring 34, so that the engagement between the sloped surfaces of the sleeve 33 and the gripping claw 29 is released, and the gripping claw 29 is released from the spring. The reference ring 26 is gripped by the spring force of 32.

Finally, move the turret tool post 4 backward in the Z direction/() and pull out the spring collet 42 from the reference ring 26.
The series of self-cutting operations is completed by returning to the origin of the X-axis and Z-axis.

10 and 11 show a ring gripping device according to another embodiment of the present invention, FIG. 1θ is a front view thereof, and FIG. 11 is a sectional view taken along line XI-XI in FIG. 10. This example is for a case where the inner circumferential surface of the reference ring 26 is gripped by the chuck jaws 44, and in this embodiment, as shown in FIGS. Porto 3 for filζ
0 is attached, the 1 gripping claw 29 is biased by the spring 32 so that its tip expands outward, and the bolt 30 comes into contact with the inner circumferential surface of the reference ring 26 and grips it due to the spring force. ing. Also 1 gripping claw 2
9 and the sleeve 33 that engage with each other are oriented in the opposite direction to those in the previous embodiment, and as the pusher plate 37 is pushed out by the operation of the cylinder 38, the distal end side of the gripping claw 29 moves inward. It opens to release the reference ring 26. Although not shown in this embodiment, the parts other than the ring gripping device 25 have the same structure and function as those in the previous embodiment, so explanation aA will be omitted. .

Furthermore, FIG. 12 is a side view of another embodiment of the present invention,
FIG. 13 is a front view of the main part, and FIG. 14 is a plan view of the main part. The above embodiment is the index plate 1
8 is used to rotate each ring gripping device 25f and position the required delivery position 121ζ.
In this embodiment, a plurality of ring gripping devices 25 are positioned using a linearly moving slider in place of the rotating index plate 18], and the number of types of reference rings 26 to be stored is relatively small. It depends on the situation.

In this embodiment, as shown in FIGS. 12 to 14, a slide base 46 is suspended and fixed between the headstock 2 and a column 45 erected on the side thereof. A slider 47 is slidably attached to. A plurality of ring gripping devices 26 as described above are attached to the front surface of the slider 47 in line with each other in the sliding direction.

Moreover, the slider 47 is disposed between the slider 47 and the headstock 2.
A hydraulic cylinder 48, which is a driving source, is attached.

As the cylinder 480 operates lζ, the syslider 47 moves along the slide base 46 (ζ).On the other hand,
A cylinder 38 for driving the ring gripping device 25 is attached to the predetermined delivery position via a bracket 49.

Therefore, in this embodiment, the reference ring 26 held by the plurality of ring holding devices 25 arranged in a straight line is positioned at a predetermined delivery position by driving the cylinder 48. below.

The attachment and detachment of the reference ring 26 from the ring gripping device 25, the attachment and detachment from the chuck claws 44, and the transfer therebetween are performed in the same way as in the previous embodiment.

15 is a side view of another embodiment of the invention, such as a colander, and FIG. 16 is a front view of the main parts thereof. In this embodiment, the ring storage device 3 has a single ring gripping device 25 and stores only a single reference ring 26. That is, as shown in FIGS. 15 and 16, the mount 50 is fixed to the headstock 2 via the bracket 51, and 1! gripping device 25
is attached, and a cylinder 38 is disposed at the rear thereof. In this embodiment, the reference ring 26 is stored in the ring gripping device 25 installed at the delivery position. The transfer is performed in the same manner as described above.

Regarding the storage of the reference rings 26, in the above-mentioned embodiments, a single item storage type, a slider type storage type for decimal numbers, and a type using an index plate that can store a relatively large number of reference rings 26 are shown. However, the ring locking device of the present invention is not limited to those illustrated, and may be appropriately selected depending on the production form, such as a device using a chain. Furthermore, the ring delivery device is not limited to the spring collet 42 shown in FIG. 1 as long as it can deliver the reference ring 26.

<Effects of the Invention> As described above in detail with reference to examples, by applying the device of the present invention to machine tools such as NC lathes that require self-cutting of chuck jaws, self-cutting standards can be achieved. The ring can be taken out from its storage location and automatically attached to and detached from the chuck, enabling unmanned machining of high-precision workpieces.

[Brief explanation of drawings]

Fig. 1 is a plan view of a lathe equipped with a chuck jaw self-cutting device according to an embodiment of the present invention, Fig. 2 is a side view thereof, Fig. 3 is a cross-sectional view taken along the line 2 in Fig. 2, and Fig. 4 is ■ in Figure 3.
-■ Arrow view, Figure 5 is a V-V sectional view in Figure 3, Figure 6 is a ■-■ sectional view in Figure 3, and Figure 7 is a reference ring delivery between the ring storage device and the turret tool rest. An explanatory diagram of the state, FIG. 8 is a sketch diagram of the reference ring delivery state with the upper chuck turret tool rest, FIG. 9 is an explanatory diagram of the self-cutting state of the chuck jaw, and FIG. 10 is another embodiment of the present invention. 11 is a front view of the ring gripping device of FIG.
The figures are a side view of another embodiment of the present invention, FIG. 13 is a front view of the main part, FIG. 14 is a plan view of the main part, and FIG.
The figure is a side view of still another embodiment of the present invention, and FIG. 16 is a front view of the main part thereof. In the drawing, 2 is the main axis. 3Fi ring storage device. 4 is the turret tool rest. 6Fi check. 25i ring gripping device. 26 is a reference ring. 42 is a spring collet, 43 is a self-cutting tool. 44 is a chuck claw. Figure 3 Lγ VVZ 4th Must Figure 5 Figure 6 Figure 7 Figure 13 Figure 14 Figure 15 Figure 76

Claims (1)

[Claims] a ring storage device that is disposed adjacent to the headstock and stores a self-cut reference ring; a turret tool rest that is movable between the headstock and the ring storage device; and a turret tool rest that is attached to the turret tool rest. and a ring transfer device for transferring the reference ring between the ring storage device and the chuck of the headstock, respectively.