JPH0239619Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a chamfering device in a punch press machine.

[Conventional technology]

Conventionally, when chamfering is performed using a punch press machine, as shown in FIG. 6, when a workpiece 1 is fed into the punch press machine under numerical control, a striker 2 descends and pressurizes a punch head 3.

As a result, the holder 4 and punch 5 descend together with the spring 6 and the like, and since the flange 7 of the holder 4 is in contact with the bush 8, the bush 8 is pushed down against the spring 9.

Then, when the holder 4 etc. descends to a certain position,
Since the lower surface of the holder 4 contacts the upper surface of the workpiece 1, the workpiece 1 is pressed against the die 10 as shown in FIG.

On the other hand, as the striker 2 continues to descend, the spring 6 is compressed and the punch 5 further descends, and the lower end chamfered portion 11 of the punch 5 protrudes downward from the through hole 12 in the bottom wall of the holder 4, and the workpiece is The end face of the cut portion of No. 1 is deformed under pressure to perform chamfering.

This state is the bottom dead center of the punch press machine. After this, when the striker 2 rises, the punch 5 rises due to the force of the spring 6 released from the pressure, and then the bush 8 rises due to the force of the spring 9. Then, push up the holder 4, punch 6, etc. to the position before processing.

[The problem that the idea attempts to solve]

When the chamfering device of a punch press machine is configured as described above, the processed shape of the workpiece is determined when the punch reaches the bottom dead center of the press, so the thickness of the workpiece is changed. In this case, it is necessary to adjust the punch length. That is, after adjusting the punch length by moving the position of the punch head, test machining is performed, and if the machined shape is insufficient, the operation is repeated again.

As a result, there were problems such as a longer period of time when the machine was stopped, resulting in a significant drop in productivity.

[The problem that the idea attempts to solve]

In order to solve the above problems, this invention consists of an upper station and a lower station arranged above and below, and a vertical hole provided in the upper station that is inserted into the vertical hole so that it can be raised and lowered while stopping its rotation. a cylindrical holder, a driver fitted into the holder so as to be able to rise and fall, a spring that applies upward return force to the driver, a striker placed directly above the driver, and a striker placed directly below the holder. In a punch press machine consisting of a die installed in a lower station, a space longer than the descending distance of the striker is secured between the lower end of the driver and the inner bottom surface of the holder, and a chamfer is provided on one or both of the holder and the die side. It is constructed by providing a molding section.

[Effect]

The punch driver, which is pressurized downward as the punch press machine operates, does not reach the workpiece, and at this time, the compressed spring causes the holder with a forming part that chamfers the workpiece to chamfer the workpiece. pressurize,
Since chamfering is performed, even if the thickness of the workpiece is changed, there is little variation in processing pressure, stable chamfering is performed, and there is no need to stop the punch press machine and adjust the mold.

〔Example〕

Figures 1 and 2 show the chamfering device of a numerically controlled punch press machine, where 21 is a striker which is the pressurizing part of the punch press machine, and 22 is the upper part of the punch press machine where the upper die is mounted. station,
23 is a lower station of a punch press machine to which a lower mold is attached.

The upper station 22 is provided with a vertical hole 24, and a cylindrical holder 25 is fitted into the vertical hole 24 so as to be movable up and down while being prevented from rotating.

To stop the rotation of the holder 25, a key 27 fixed in the upper station 22 through a bolt 26 is slidably fitted into a groove 28 provided in the longitudinal direction of the outer circumference of the holder 25.

Reference numeral 29 denotes a driver fitted into the holder 25 so as to be movable up and down, and a space longer than the descending distance of the striker 21 is secured between the lower end of the driver 29 and the inner bottom surface of the holder 25.

Reference numeral 30 denotes a collar fitted on the outside of the driver 29. The collar 30 has its lower surface abutted against the upper edge surface of the holder 25, and is fixed to the holder 25 with screws 31.

A spring 32 is fitted on the outside of the driver 29 with both ends abutting against the upper punch head 33 and the collar 30 of the driver 29 so that the holder 25 and the driver 29 move up and down together.

Numeral 34 is a bolt fixed in the upper station 22, and a bushing 35 fitted on this bolt 34 so as to be able to rise and fall is pushed back upward by a spring 36, and the upper surface of the bushing 35 and the flange 3 on the upper edge of the holder 25 are pushed back upwards by a spring 36.
7 are in contact with each other.

38 is a die provided on the lower station 23.

39 is a chamfered molded portion provided on the lower surface of the holder 25.

The above-mentioned molding part 39 is the bottom holder 2 in the case shown in the figure.
As shown in FIG. 3, a replacement method is adopted in which a bottom plate 40 with a molded part 39 is fixed to the lower end of a cylindrical holder 25 with an open bottom surface via bolts 41. Good too.

Note that the spring 32 may be a disc spring or a urethane spring other than the illustrated coil spring.

Next, the chamfering method will be explained.

When the workpiece A is carried into a predetermined position according to the numerical control command of the punch press machine, the striker 2
1 descends and pressurizes the punch head 33.

This causes the holder 25 and driver 29 to
It descends with 2.

At this time, the bush 35 is pushed down by the collar 37 of the holder 25 to compress the spring 36.

When the holder 25 and the like are lowered to a certain position in this manner, the forming portion 39 of the holder 25 comes into contact with the upper surface of the workpiece A and presses the workpiece A against the die 38.

The spring 32 is compressed by the striker 21 which continues to descend further.

At this time, the driver 2 descending inside the holder 25
The lower end of the holder 9 does not reach the upper surface of the bottom wall of the holder 25.

The force of the compressed spring 32 pushes down the holder 25, and the end face of the cut portion of the workpiece A is pressurized and deformed by the forming portion 39 to perform chamfering.

After that, when the striker 21 rises, the force of the spring 32 released from the pressurization causes the driver 29 to rise, and then the force of the spring 36 causes the bush 35 to rise.
is raised, and the holder 25 pushes up the driver 29 and returns it to the position before processing.

Moreover, as shown in FIG. 4, the molding part 39 is not provided on the lower surface of the bottom wall of the holder 25, but the molding part 3
9 and a pin 4 on the outside of this die 38.
Plate 4 fitted so that it can be raised and lowered using 3 as a guide
1 is pushed back upward by the spring 42, and the striker 21 is lowered in the same manner as described above. The lower surface of the holder 25 presses the workpiece A onto the plate 41, and the plate 41 is pushed down together with the workpiece A, and the die 38 Since the workpiece A is pressed against the forming part 39, the workpiece A is chamfered.

The pressing force at this time is the compressive load of the spring 32, and if the force required to chamfer the workpiece A exceeds this, the spring 32 will further contract, and more force will be applied to the workpiece A. You won't be disappointed. Therefore, a certain chamfering process can be performed.

Furthermore, as shown in FIG.
By providing the forming portion 39 on both sides, it is possible to chamfer both sides of the workpiece A at the same time.

In the figure, 44 is a pin that fits into the vertical groove 45 to stop the rotation of the die 38 fitted to the lower station 23.

〔effect〕

As described above, according to the chamfering device in a punch press machine according to this invention, a space longer than the descending distance of the striker is secured between the lower end of the driver and the inner bottom surface of the holder to reach the workpiece. Since the force of the spring compressed by the non-operating driver becomes the pressing force applied to the workpiece, there is no need to adjust the mold every time the thickness of the workpiece is changed.

Therefore, continuous machining is possible, and it is possible to eliminate the inconvenience of a drop in productivity due to a significantly longer machine stop time during adjustment.

Furthermore, by providing molding portions on both the holder and the die, it is possible to chamfer both surfaces of the processed portion.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional front view of the chamfering device according to this invention, Fig. 2 is an enlarged longitudinal sectional front view during chamfering, Fig. 3 is an enlarged longitudinal sectional front view of the bottom plate with a molded part, and Figs. 4 and 5. The figures are an enlarged longitudinal front view showing another embodiment, FIG. 6 is an enlarged longitudinal front view of a conventional chamfering device, and FIG. 7 is an enlarged longitudinal front view during chamfering. A... Work material, 21... Striker, 22...
...Upper station, 23...Lower station, 2
4... Vertical hole, 25... Holder, 29... Driver, 30... Collar, 31... Screw, 32... Spring, 33... Punch head, 34... Bolt, 3
5...butsuyu, 36...spring, 37...tsuba, 3
8... Die, 39... Molding part, 40... Bottom plate, 4
1...Plate, 42...Spring, 43...Pin.

Claims (1)

[Scope of utility model registration request] An upper station and a lower station are arranged vertically, and a cylindrical holder is fitted into a vertical hole provided in the upper station so that it can be raised and lowered while stopping rotation, and a cylindrical holder is provided with a return force for raising and lowering. A punch press machine consisting of a driver that is freely inserted, a spring that applies upward return force to the driver, a striker that is placed directly above the driver, and a die that is placed on a lower station so that it is located directly below the holder. A punch press characterized in that a space longer than the descending distance of the striker is secured between the lower end of the driver and the inner bottom surface of the holder, and a chamfered part is provided on one or both of the holder and the die side. Chamfering device on machine.