JPS608914Y2 - Multi-stage copy cutting device for machine tools - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cycle copying cutting device for machine tools such as lathes.

When machining a workpiece with a large machining allowance, for example a workpiece W with a large machining allowance T as shown in FIG. 4, by copy cutting, the shape of the scene is obtained through a cycle involving several steps, but
Conventionally, this type of multi-stage hydraulic profiling cutting equipment uses an indexing device equipped with several types of templates or models themselves.
Also, at the same time, the required position of the feed slide movement, for example position A.

At B, C, D, etc., several stages of limit switches and dogs are required to obtain electrical signals to return the cutter, and thus the copying slide and the feed slide, to the required position S. Therefore, it is necessary to create a template or model and set each limit. Adjusting the position of the switch requires considerable effort, and the template or model is moved every cycle, which poses a problem in the accuracy of machining the workpiece.

Therefore, the present invention has developed a stylus that can automatically obtain an electrical signal by contacting the stylus with the template or model at a required position on the template or model depending on the depth of cut into the workpiece. The depth of cut can be easily controlled using the mini-stopper of the rotary indexing device at the section.
Moreover, since there is no movement of the template or model, machining accuracy can be guaranteed, and the object is to provide an inexpensive multi-stage profile cutting device suitable for producing a wide variety of workpieces in small quantities.

Next, an illustrated embodiment of the present invention will be described. This example shows a case where it is applied to a copy cutting device of a lathe.
3 is a feed slide base fixed to the machine body 1, and 3 is a feed slide slidably fitted to the feed slide base 2, which is movable in the direction of the feed axis in the same direction as the axis of the main shaft 4 supported on the machine body 1.

Reference numeral 5 denotes a hydraulic feed cylinder attached to the feed slide base 2, and its rod 6 is connected to the feed slide 3 to cause the feed slide 3 to reciprocate.

A hydraulic copying device 7 is installed on the feed slide 3, and the hydraulic copying device 7 moves the copying slide base 8 to the feed slide 3.
A copying slide 10 having a tool rest 9 is fixed on the copying slide base 8, and a piston rod 12 of a hydraulic cylinder 11 formed in the copying slide 10 is fixed to the copying slide base 8 with a nut 13. The stylus 16 at one end of the stylus lever 15 supported by the pin 14 on the copying slide 10 collides with the spool 18 of the control valve 17 attached to the copying slide 10, and the stylus is fixed to the other end of the stylus lever 15 via an insulating bushing 19. The shaft 20 is attached, the stylus 21 is fixed to the lower part of the stylus fixing shaft 20, the passage 22 leading to the front chamber of the hydraulic cylinder 11 is connected to the pressure oil pipe 23, and the passage 24 leading to the rear chamber of the hydraulic cylinder 11 is connected. It is switchably connected to a pressure oil pipe 23 and a return oil pipe 25 via a control valve 17.

An electrically insulated insulating stopper 26, for example, a stopper made of hard nylon, is provided on the upper part of the stylus fixing shaft 20, and a rotary indexing device 27 is provided on the copying slide base 8.

As mainly shown in FIG. 3, the rotary indexing device 27 includes a stepping rotary solenoid 29 having a built-in stepping mechanism and an indexing mechanism attached to one end of a cylindrical support 28 fixed to the copying slide base 8. A tenth tally switch 30 and a twentieth tally switch 31 having an interrupter are attached to the solenoid 29,
An indexing shaft 33 supported by a bearing 32 on the support body 28 is connected to an output shaft 34 of a stepping tally solenoid 29, and a plurality of indexing shafts corresponding to the number of indexes of the output shaft 34 are provided on the end surface of the large diameter portion of the indexing shaft 33. Screw holes 35 along the axial direction are provided at equal intervals in the circumferential direction, and the screw holes 3 of the required number from the first of these screw holes 35 are provided.
A screw-shaped mini-stopper 36 is screwed into 5 and positioned with a lock nut 37, so that the tip of the mini-stopper 36 faces the insulating stopper 26 at a predetermined indexed position.

Further, in this example, the stylus fixing shaft 20 is connected to the positive pole of the power source 39 via the coil of the relay 38, the negative pole of the power source 39 is grounded, and the support device 41 that supports the template or model 40 is grounded. As shown in Relay 3
8 is connected to the stepping rotary solenoid 29 via an electric control device 42, and the first rotary switch 30 mechanically connected to the stepping rotary solenoid 29 is connected to the electric control device 42 via a setting dial switch 43. The 20th tally switch 31 mechanically connected to the stepping rotary solenoid 29 is connected to the stepping rotary solenoid 29.
is connected to.

Note that 44 is a stylus shaft cover provided on the stylus fixing shaft 20, and 45 is a chuck provided at the tip of the main shaft 4, to which the workpiece W is attached.

46 is a cutting tool attached to the tool rest 9.

Next, the operation of this example device will be explained.

When processing a workpiece W with a large machining allowance T as shown in FIG. □□1 in the second, third, and fourth cycles Y2. Y3
．． Y, then the second, third and third diagonal line prisoners 2. N3. N
4, and in the final fifth cycle Y5, when shaping the desired shape by following the template or model 40, the lengths of the first to fourth mini-stoppers 36 to 36 are adjusted according to the turning depth of the workpiece W. If you adjust and perform copy cutting,
The cutting tool 46 on the tool rest on the copying slide 10 is the stylus 2.
1 tip and the template or model 40, the insulating stopper 26 on the upper part of the stylus fixing shaft abuts the opposing first mini-stopper 36 by means of the rotary indexing device 27, thereby allowing the control valve 17 to The position of the cutting tool 46 is regulated to a position corresponding to the depth of cut,
In this state, the workpiece W is turned in parallel to the feed axis of the feed slide 3 by the feed movement of the slide 3, and when the cutting tool 46 reaches a predetermined position A as the feed movement progresses, the stylus 2
1 tip contacts the template or model 40 and is grounded, and the resulting electrical signal of the relay 38 is sent to the electrical control device 42.
At the same time, the scanning slide 10 and the feeding slide 3 are returned to the required position S via the stepping rotary solenoid 29 to move the rotary indexing device 27 forward.

The return of the copying slide 10 and the feed slide 3 to the predetermined position S activates a limit switch (not shown), which commands a second stage cycle via the electric control device 42, thereby causing the same insulating stopper as described above to be activated. 26 comes into contact with the opposing second mini-stopper 36, and cutting is performed in the second cycle Y2 in the same manner as described above. When the cutting tool 46 reaches a predetermined position, the tip of the stylus 21 contacts the template or model 40 as described above, and Similarly, when returning to the required position S, the rotary indexing device 27 advances in the same manner, and cutting is performed by the mini-stoppers 36 to 36 a required number of times in the same manner.
In this example, after the last cutting by the fourth mini-stopper 36 is completed, the stylus 21 touches the ground and returns to the required position S in the same manner as described above, and the rotary indexing device 27 advances.

Then, the preset setting dial switch 4
3 command position and the 10th position which was stepping on the rotary indexing device.
When the corresponding positions of the tally switch 30 match, a matching signal is generated, and this signal is sent via the electric control device 42 to perform the normal copying operation in the next final cycle (fifth cycle Y5), that is, to change the stylus 21 to the template or model. 40 and activates the relay 38, the stylus 21 performs a normal tracing operation according to the template or model 40 without causing the relay 38 to return the tracing slide 10 and the feed slide 3. W is processed along the template or model 40.

A forward end limit switch (not shown) is activated at the forward end of the feed slide 3 to issue a return signal, which returns the copying slide 10 and the feed slide 3 to the return position via the electrically controlled feed station 42.

Note that when the return position is returned, a return signal from a return confirmation limit switch (not shown) is sent to the electric control device 42.
actuates the stepping rotary solenoid 29 via the nest 20 with the incretor switch - in conjunction with the tally switch 31, steps the stepping rotary solenoid 29 and thus the rotary indexing device 27 one after another, and the rotary indexing device When No. 27 reached the first index position, No. 20, which was moving forward,
- It is stopped by the tally switch 31 and restored to the state at the beginning of the explanation.

In addition, although the case where the advance of the rotary indexing device and the switching between cutting by the insulating stopper and cutting by copying are performed automatically is shown in the upper part, it is also possible to perform these manually.

As described above, the present invention provides electrical insulation to the stylus fixed shaft of the hydraulic copying device in a machine tool copying cutting device equipped with a hydraulic copying device on the feed slide, and the stylus is replaced with a template or model. The stylus is grounded due to electrical continuity between the stylus and the template or model when the liquid drips, creating an electrical circuit that generates an electrical signal.On the other hand, the stylus fixing shaft, which avoids the tip of the stylus, is electrically insulated. A rotary indexing device is installed opposite the insulating stopper and is equipped with several types of mini-stoppers that the insulating stopper comes into contact with at a required position before the stylus tip follows the template or model. The electric signal can be automatically obtained by contacting the stylus with the template or model at the required position of the template or model depending on the depth of cut into the workpiece, and the stylus can be used at the part where no force is applied. The depth of cut can be easily controlled using the mini-stopper of the rotary indexing device, and since there is no movement of the template or model, processing accuracy can be guaranteed, making it suitable for low-volume production of a wide variety of products at a low price.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a partially cutaway plan view, FIG. 2 is an enlarged plan view of the main part, FIG. 3 is a partially cutaway side view of the upper part, and FIG. FIG. 4 is a plan view for explaining cutting of the workpiece, and FIG. 5 is an electrical system diagram. 1... Body, 2... Feed slide base, 3... Feed slide, 4... Main shaft, 5... Hydraulic feed cylinder, 6...
Rod, 7... Hydraulic copying device, End... Copying slide base, 9... Turret, 10...
... Copy slide, 11 ... Hydraulic cylinder, 12 ... Piston rod, 13 ...
Nut, 14... Zen, 15... Stylus lever, 16... Stylus, 17...
Control valve, 18...Spool, 19...
Insulating bushing, 20... Stylus fixed shaft, 2
1... Stylus, 22... Passage, 2
3... Pressure oil pipe, 24... Passage, 25...
... Oil return pipe, 26 ... Insulating stopper, 27 ... Rotation indexing device, 28 ... Support body, 29 ... Stepping rotary Solenoid, 30...10th tally switch, 31
...20th-tally switch, 32...
・Bearing, 33... Index shaft, 34...
...Output shaft, 35...Screw hole, 36...
・Mini stopper, 37...Lock nut, 3
8... Relay, 39... Power supply, 40.
...template or model, 41...
Support device, 42... Electric control device, 43...
...Dial switch, 44...Stylus shaft cover, 45...Chuck, 46...
・Cutter, A, B, C, D...Position, N1・
...First diagonal line part, N2... Second diagonal line part,
N3...Third diagonal line part, N,...Fourth diagonal line part, S...Required position, T...Movement allowance, W... ...Workpiece, Yl...3rd cycle, Y2...2nd cycle, Y3...
3rd cycle, "4... 4th cycle, Y5.
...5th cycle.

Claims (1)

[Scope of utility model registration request] In the copying cutting device of a machine tool equipped with a hydraulic copying device on the feed slide, the stylus fixed shaft of the hydraulic copying device is electrically insulated so that when the stylus comes into direct contact with the template or model, the stylus and template or model An electrical circuit is constructed in which the stylus is grounded and generates an electrical signal through electrical continuity between the A multi-stage machine tool characterized in that a rotary indexing device equipped with several types of mini-stoppers with which the insulating stopper comes into contact at a required position before imitating a template or model is installed opposite the insulating stopper. Copy cutting device.