JPH10175096A - Cam-type press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the structure, and to reduce the manufacturing time and the manufacturing cost by fitting a balance weight and a slide between an upper frame and a lower frame to a guide rod part provided on a tie rod in a vertically movable manner. SOLUTION: When a drive gear 9 is driven by a servo motor to turn main gears 13A, 13B, a first cam 14A and a second cam 14B are turned through shafts 12A, 12B. A balance weight 5 and a slide 6 are relatively and vertically moved by turning the first cam 14A and the second cam 14B through first stands 15A, 15A, 15B, 15B having cam followers 17A, 17A, 17B, 17B to hold the first cam 14A and the second cam 14B and second stands 16A, 16B. A work is pressed by a die provided between a lower frame 2B and the slide 6 while dynamically balanced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cam press machine in which a slide is moved up and down by a rotating cam, and more particularly to a cam press machine having a high speed and a short slide stroke.

[0002]

2. Description of the Related Art Conventionally, cam press machines having a dynamic balancing device are disclosed in JP-A-7-60497 and JP-A-7-60499.

[0003]

SUMMARY OF THE INVENTION The above-mentioned prior art is
In each case, the structure was complicated, so that it took a lot of time and money to manufacture.

An object of the present invention is to solve the above-mentioned problems and to provide a cam-type press machine having a minimum number of parts.

[0005]

In order to solve the above-mentioned problems, the present invention provides a press machine frame in which an upper frame and a lower frame are fastened by tie rods and nuts standing on the lower frame. A balance weight and a slide are provided between the upper frame and the lower frame so as to be vertically movable on a guide rod portion provided on the tie rod.

A servo motor is provided upright on the upper frame, and a drive gear is provided at a shaft end of the servo motor in the upper frame. The drive gear meshes with the main gear on the shaft which is rotatably fitted to the bearing of the upper frame, and a disk-shaped cam having two uneven portions on the outer periphery of the upper and lower surfaces is fixed to the shaft end of the main gear. I do.

The cam is located between the balance weight and the slide, and has two first stands erected on the slide.
The balance weight and the slide are held by a pair of cam followers rotatably provided on the first stand and two second stands fixedly shifted by 90 degrees on the lower surface of the balance weight. A cam type press machine which moves up and down relatively is constituted.

[0008]

FIG. 1, FIG. 2, and FIG. 3 show an embodiment of the present invention. In this embodiment, the frame 2 of the two-point press machine 1 is configured by fastening an upper frame 2A and a lower frame 2B with a tie rod 3 erected on the lower frame 2B and nuts 4A and 4B. Between the upper frame 2A and the lower frame 2B, a balance weight 5 and a slide 6 are fitted to guide rods 3A provided on the tie rods 3, 3 and guides 7, 7 provided on the 3A so as to be vertically movable. Provided.

A servo motor 8 is provided upright on the upper frame 2A, and a drive gear 9 is provided at a shaft end 8A of the servo motor 8 in the upper frame 2A. The drive gear 9 includes a bearing 11 of the upper frame 2 </ b> A,
A meshes with the main gear 13A on A. Further, the main gear 13A meshes with a main gear 13B on a shaft 12B rotatably fitted to the bearings 11, 11 of the upper frame 2A.

At the shaft end 12A of the main gear 13A and the shaft end 12B of the main gear 13B, disk-shaped first and second cams 14A and 14B each having two concave and convex portions on the upper and lower surfaces are fixed. .

The first cam 14A and the second cam 14B are located between the balance weight 5 and the slide 6, and are provided on the slide 6 by first stands 15A and 15
A, a pair of cam followers 1 provided on 15B, 15B
7A, 17A, 17B, 17B and balance weight 5
The second stands 16A, 16B are fixed to the left side of the first cam 14A and the right side of the second cam 14B, respectively, with a phase shift of 90 degrees from the first stands 15A, 15B.
A pair of cam followers 18A, 18A, 18
B and 18B so as to be rotatable.

When the drive gear 9 is driven by the servo motor 8 to rotate the main gears 13A and 13B, the first cam 14A and the second cam 14B rotate via the respective shafts 12A and 12B. By the rotation of the first cam 14A and the second cam 14B, the first stand 15A, 15A, 15B, 15B and the second stand having the cam followers 17A, 17A, 17B, 17B sandwiching the first cam 14A and the second cam 14B.
Balance weight 5 via stands 16A and 16B
The slide 6 moves up and down relatively, and the material is pressed by a mold (not shown) provided between the lower frame 2B and the slide 6 while dynamically balancing.

In this embodiment, since there are two concave and convex portions provided on the outer peripheral portions of the upper and lower surfaces of the cam 14, the first stand 15 and the second stand 16 are out of phase by 90 degrees to form the first cam 14A. The first stand 15 and the second stand 14 are provided for each of the first and second cams 14B, and the second stand 14 is provided for each of the two cams 14B. By changing the phase, the first
The number of the stands 15 and the second stands 16 can be changed.

[0014]

As is apparent from the above description, according to the present invention, it is possible to provide a cam-type press machine having a simple structure, capable of reducing the manufacturing time and the manufacturing cost.

[Brief description of the drawings]

FIG. 1 is a front view of a cam press machine according to an embodiment of the present invention.

FIG. 2 is a left side sectional view of the cam press machine.

FIG. 3 is a plan sectional view of the cam press machine.

[Explanation of symbols]

1 is a press machine, 2 is a frame, 2A is an upper frame, 2
B is a lower frame, 3 is a tie rod, 3A is a guide rod, 4A and 4B are nuts, 5 is a balance weight, 6 is a slide, 7 is a guide, 8 is a servomotor, 8A is a shaft end of a servomotor 8, 9 Is a drive gear, 11 is a bearing, 1
2A and 12B are shafts, 13A and 13B are main gears, 14
Is a cam, 14A is a first cam, 14B is a second cam, 15,
15A, 15B is the first stand, 16, 16A, 16B
Is a second stand, and 17A, 17B, 18A and 18B are cam followers.

Claims (1)

[Claims] 1. A cam press machine in which a slide is moved up and down by a rotating cam. (A) The frame of the press machine is constituted by fastening an upper frame and a lower frame with a tie rod and a nut standing upright on the lower frame. Configure. (B) A balance weight and a slide are provided between the upper frame and the lower frame so as to be vertically movable on a guide rod portion provided on the tie rod. (C) Servo motors are set upright on the upper frame,
A drive gear is provided at the shaft end of the servo motor in the upper frame. (D) The drive gear meshes with the main gear on the shaft rotatably fitted to the bearing of the upper frame. (E) At the shaft end of the main gear, a disc-shaped cam having two concave and convex portions on the outer peripheral portions of the upper and lower surfaces is fixed. (F) The cam is located between the balance weight and the slide, and has two first stands erected on the slide and two second stands fixed on the lower surface of the balance weight with a phase shift of 90 degrees from the first stand. And a pair of cam followers provided rotatably. A cam-type press machine configured as described above, wherein the balance weight and the slide are moved up and down relatively by rotation of the cam.