JPH09314396A - Press equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the press apparatus using a small sized drive source, by which a part requiring working can be selected, plural working is performed with a difference in time, lots of setups are not necessary, and workability is satisfactory. SOLUTION: The press apparatus is equipped with plural working heads 1 consisting of punches set in the same dies, and is constituted so that each working head 1 is individually worked. Meanwhile, the press apparatus is equipped with cams 12 and plural cam mechanisms converting the rotational motions of the cams 12 into straight reciprocating motions on the ram 4 side. The plural working heads 1 are moved by the straight reciprocating motion of the cam mechanisms, and a material is worked in plural sections.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press device for performing shearing / bending processing and the like.

[0002]

2. Description of the Related Art In a conventional press device using a reciprocating slider crank mechanism, in order to perform a plurality of machining operations with a single linear motion reciprocating motion of the entire ram, the number of machining points increases. Only the press thrust needs to be increased. Similarly, as the area of the ram increases, more thrust is required to drive the press itself, which necessitates the introduction of a large press machine.

[0003]

A plurality of processes can be performed by a plurality of small press machines. However, when a plurality of small press machines are used, a lot of setup and time are spent for material transportation and positioning.

In the case of a hydraulic press device using a plurality of hydraulic cylinders, a plurality of processes can be easily performed by a single device. However, there is a drawback that the processing speed is reduced.

Further, when a plurality of processings are not performed at a part of the processing, the processing head (punch, etc.) is removed or a dedicated die is used, which also requires a lot of setup and time. There was a drawback.

[0006]

SUMMARY OF THE INVENTION In order to eliminate these drawbacks, the object of the present invention is to select a processing location by a press device composed of a plurality of cam mechanisms and to provide a time difference between a plurality of processings. It is an object of the present invention to provide a press device using a small drive source, which requires less setup and has good workability.

[0007]

According to the present invention, a plurality of processing heads made of punches are provided in the same die, and each processing head is configured to move individually, while a bolster is installed on the upper surface of the heads. Upright the post from the head,
The post supports the ram, and the ram side has a plurality of cam mechanisms that convert the rotational motion of the cam and the linear motion to the linear motion.
The linear reciprocating motion of the cam mechanism is a press device characterized in that the plurality of processing heads are operated to process the material at a plurality of locations.

Further, the present invention is a press device for processing a material by providing a time lag in the operation of the plurality of cam mechanisms.

Further, the present invention is a press device in which the cam mechanism and the machining head contact surface of the die are provided with concavities and convexities, and the presence or absence of machining is selected depending on whether or not the concavities and convexities mesh with each other.

With the above construction, machining can be carried out at a plurality of locations, and by giving a time difference to each machining, the machining thrust is dispersed and the maximum thrust is reduced. This allows
It is possible to downsize the machine without reducing the output of the drive source or excessive rigidity. Further, the press device is capable of selecting a processing location.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view of the pressing apparatus, and the hatched portions show cross sections.

In FIG. 1, the press device of the present invention has a bolster 2 on the upper surface of a bed 1a, and a ram 4 is supported by a post 3 from the bed 1a to form a general press structure.

A camshaft 13 is rotatably supported on the ram 4 by a holder 15 and a bearing 14. The cam 12 is arranged on the cam shaft 13.

Next, the pusher 10 has a spring 11
It is restrained by the end face of the cam 12. The pusher 10 linearly reciprocates by the rotational movement of the cam 12 to form a cam mechanism.

A punch 7 having a male cutting edge is held by a punch holder 6 as a processing head 1 and a spring 8 is provided.
Is constrained by the backing plate 9 to form an upper mold. The lower die is a die 5 having a female cutting edge, and the upper die and the lower die constitute a punching die accompanied by shearing.

FIG. 2 is a front view showing a method of selecting the processing operation of the punch 7 of the processing head 1, and the hatched portion shows a cross section. The pusher 10 has a structure similar to that of the punch drive structure described above, but a gear 18 is arranged in the pusher 10, and another gear 17 in a position meshing with the gear 18 is held by an actuator 16. The gear 17 and the gear 18 have a tooth width for always meshing with each other even when the linear motion of the pusher 10 is performed. In addition, the pusher 10 and the punch 7 of the processing head 1 have tooth shapes in which the tips of the two are missing.

When processing is selected, the pusher 10
The tips of the missing teeth of the punch 7 are arranged so as to mesh with each other, and the linear reciprocating motion of the pusher 10 is transmitted to the punch 7 to be driven for processing.

Next, when no machining is selected, when the cam is positioned at the top dead center, the actuator 16 causes the gear 1 to move.
By passing 7 while meshing with the gear 18,
Rotate pusher 10. Further, the tips of the teeth where the pusher 10 and the punch 7 are missing are arranged so as not to mesh with each other, and when the cam is located at the bottom dead center, the pusher 1
The linear motion reciprocating motion of 0 is not transmitted to the punch 7 and machining is not performed.

At this time, the axial torque required for the actuator 16 is proportional to the force by which the spring 11 restrains the pusher 10 to the cam 12 and the friction coefficient of the contact surface between the pusher 10 and the cam 12, so By minimizing the friction coefficient, it is possible to perform the operation of selecting the presence or absence of machining at a higher speed. As described above, since it is possible to instantly select the presence or absence of machining, it is possible to easily change the specifications, and various machining can be performed by using progressive machining.

As described above, by rotating the cam shaft 13, the cam 12 is rotated, the pusher 10 makes a linear reciprocating motion along the locus of the end face of the cam 12, and the punch 7 is driven to perform punching. It can be performed.

A plurality of punch drive structures using the above cams are arranged in parallel.

By arranging a plurality of punch drive structures by the cam 12, it is possible to process at a plurality of locations, and if each punch drive is provided with a time lag and is sequentially processed, the thrust required for the processing is dispersed.

Therefore, the maximum shaft torque of the camshaft may be the torque conversion value of the maximum thrust of one of all the machining points, and it is not necessary to use the torque conversion value of the sum of the thrusts of all the machining points. The torque can be kept small,
The drive source can be small.

Further, since the thrust force and the axial torque value can be suppressed to be small, it is not necessary to strengthen the rigidity of the structure.

[0026]

As described above, since it is possible to select a machining location and provide a time difference for a plurality of machining,
It is possible to provide a press device having a small number of setup steps, good workability, and a small drive source.

[Brief description of drawings]

FIG. 1 is a front partial cross-sectional view of a press device showing an embodiment of the present invention.

FIG. 2 is a front partial cross-sectional view showing a punching operation of the pressing apparatus of the present invention. FIG. 2A is an operation diagram in which the cam is at the top dead center and the pusher and the punch are in a position to abut each other. FIG.
FIG. 7B is an operation diagram in which the cam is at the bottom dead center and the pusher and the punch are in a position where they are in contact with each other. FIG. 2 (c) is an operation diagram in which the cam is at the top dead center and the tips of the pushers that are missing are in a mutually offset position. FIG. 2D is an operation diagram in which the cam is at the bottom dead center and the tips of the pushers are at different positions.

[Explanation of symbols]

 1 Processing Head 1a Bed 2 Bolster 3 Post 4 Ram 5 Die 6 Punch Holder 7 Punch 8 Spring 9 Backing Plate 10 Pusher 11 Spring 12 Cam 13 Camshaft 14 Bearing 15 Holder 16 Actuator 17, 18 Gear

Claims (3)

[Claims] 1. A plurality of processing heads made of punches are provided in the same die, and each processing head is configured to move individually. On the other hand, a bolster is installed on the upper surface of the head to erect the post from the head, Support the ram by,
The ram side has a plurality of cam mechanisms that convert rotational movement of the cams and cams into linear motion reciprocating motions, and the linear motion reciprocating motions of the cam mechanisms operate the plurality of processing heads to process the material at multiple locations. A press device characterized by the above. 2. The press device according to claim 1, wherein the material is processed by providing a time difference between the operations of the plurality of cam mechanisms. 3. The cam mechanism and the machining head contact surface of the die are provided with concavities and convexities respectively, and the presence or absence of machining is selected depending on whether or not the concavities and convexities mesh with each other. The press device described.