JPS60223700A - Opposed type press - Google Patents

Abstract

PURPOSE:To obviate direct action of the reaction by press working on a frame in the stage of turning opposedly disposed yokes in diametrically opposite directions and subjecting a material to press working by providing tie rods between the turning centers of the yokes. CONSTITUTION:An eccentrical shaft 2 is rotationally driven around the axial center O by a driving device 1 to move connecting rods 4a, 4b in diametrically opposite right and left directions, thereby moving back and forth the rods. The yokes 8a, 8b are thereby turned around pins 7a, 7b, by which sliders 11a, 11b are moved so as to attach and detach in the right and left directions. The material 24 is press-worked by tools 23a, 23b. The reaction during the press working acts as tensile force on a tie rod 16 via the slides 11a, 11b, the yokes 8a, 8b, supporting blocks 6a, 6b, cylinders 18a, 18b, piston nut 17a, 17b and acts at the same time as compressive force on the rods 4a, 4b. Exertion of excessive moment on the frame 3 is thus obviated and the reduction in the size of the frame 3 is made possible.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an opposed press for pressing metal and non-metal materials.

[Conventional technology]

Fig. 1 shows an outline of a conventional opposed-type press, in which eccentric shafts s and b are drivably supported by frames a and a, which are divided into left and right frames, and the eccentric shafts s and b are oriented in the line direction. Connecting rods c and c are pivotally mounted, and yokes d and d are rotatable in left and right directions about axes e and e' at the tips of the connecting rods c and c'.
The lower ends of the yokes d and d' are pivotally connected, and molds f and f' that can move left and right are connected to the upper ends of the yokes d and d'. By changing the position, the distance between the molds f1 and f' can be adjusted in accordance with the width of the workpiece material.

When machining workpiece material, the drive devices i and i' are driven to drive the eccentric shafts to the binions j, j' and gears through the
By rotating b' and moving the connecting rods c and c oppositely to the left and right, the yokes d and d' are simultaneously moved inward and outward in the width direction of the workpiece material to press the workpiece material. Is going. Note that Q and Q' are bevel gears, and m is a connecting shaft.

However, in such conventional opposed presses,
Since frames a and a' are provided separately on the left and right,
An excessive moment due to reaction force during press working acts on frames a, a', and therefore frames a, a' must be made strong. As a result, frames a, a,
There was a problem that a' became large and the entire device became large.

Also, as shown in Utility Model Application No. 56-24559,
Structures have been proposed in which the reaction force during press working is received by a combination of multiple tie rods and blocks or by a ring-shaped frame, but in the former case, the block must be made strong to resist the bending force. On the other hand, in the latter case, a moment is generated at the boundary between the column and the block, which corresponds to the tie rod, and this ultimately becomes a factor in increasing the size of the entire equipment.

[Problem that the invention seeks to solve]

SUMMARY OF THE INVENTION An object of the present invention is to provide a lightweight, compact, and robust opposing press having a structure that prevents reaction force from press working from directly acting on the frame.

[Means for solving problems]

The opposed press of the present invention has a structure in which a tie rod is provided between the rotational centers of the yokes so that the reaction force during processing can be received by the tierod, and a structure further provided with a movement mechanism between the rotational centers of the yokes. .

〔Example〕

As shown in FIGS. 2 to 4, it can be driven by the drive device 1 [rotation axis 0], and is equally sized 18 mm from the rotation axis 0.
Eccentric axis 0, . 0.

An eccentric shaft 2 having a diameter is supported at the center of the lower part of a frame 3, and connecting rods 4a and 4b oriented in the left-right direction are pivotally connected to the eccentric shaft 2 in a telescopic manner. Support blocks 6a and 6b are disposed above the connecting rods 4a and 4b so as to be slidable in the left-right direction between the upper and lower guide members 5a and 5b, and the support blocks 5a.

Pins 7a and 7b are provided protruding from the front and rear outer surfaces of the yokes 6b, and the central portions of the yokes 8a and 8b are pivotally connected to the bins 7a and 7b so as to rotate in the left and right directions about the bins 7a and 7b. Further, the tips of the connecting rods 4a, 4b are connected to pins 9a at the lower ends of the yokes 8a, 8b.
, 9b, and at the upper ends of the yokes 3a, 8b, there is a horizontal direction between the upper guide members 5a, 5b, the guide members 10a, 10b provided above the guide members 10a, 10b, and the side guide members (not shown). A slide 118.11b slidably guided by the pins 12a, 12b is connected to the slide 118.11b.

Windows 13a, 13b are opened in the slides 118.11b, and blocks 14a, 14b are provided in the windows 13a, 13b.
The blocks 14a, 14b are attached to the pins 12a, 12b. Therefore, the yoke 8a.

The vertical displacement of the pins 12a and 12b due to rotation (fan-shaped movement) about the bins 7a and 7b of block 1
It is absorbed by A fall of 4a and 14b.

Further, a tie rod 16 having threaded portions 15a and 15b at both #ii portions is inserted into the support blocks 5a and 5b, and piston nuts 17a and 17b are inserted into the threaded portions 15a and 15b of the tie rod 16, respectively. Then, the cylinders fi 18a, 18b are slidably fitted into the piston nuts 178, 17b, the inner ends of the cylinder tubes 18a, 18b are fixed to the husband support blocks 5a, □b, and the rings 19a-- 19b is assembled to the inside of the rear part of the cylinder tubes 18a, 18b with screws, etc., and fixed so that it can be disassembled.
When the working fluid is pumped into the cylinder chambers 22a, 22b between the rings 19a, 19b, the piston nut 17
a, 17b and prevent it from moving any further.

Note that the piston nuts 17a and 17b are connected to the cylinder tube 18.
a, 18b or rings 19a, 19b, or a separate ring (not shown) fixed thereto, is prevented from rotating via a spline, key, etc., and can be slid relative to the axial direction. It is tightly engaged. A fluid pressure supply device and a safety valve or an accumulator (not shown) are connected to the cylinder chambers 22a and 22b.

With this structure, if a pressure corresponding to the maximum working force is applied to the cylinder chambers 22m and 22b during press working, the cylinder chamber 22a will remain in the cylinder chamber 22a during press work in normal machining machine J.

Compression of the fluid within 22b does not occur, and the spring constant of the entire device can be maintained large. Also, cylinder chamber 228.22
If the pressure in b is lower than the pressure corresponding to the maximum machining force or at atmospheric pressure, the cylinder chamber 228.22b
Although compression of the fluid within the cylinders 18a and 18b occurs,
The rear structure can be made lighter and simpler. However, even in this case, the safety valve must be set at an appropriate pressure higher than the pressure corresponding to the maximum press load.

Furthermore, worm wheels 20a and 20b are attached to both ends of the tie rod 16 via splines or the like so that the tie rod 16 can be stretched by processing force, and a worm driven by a drive device (not shown) is attached to the worm wheels 20a and 20b. 21a.

21bt-t1m, the tie rod 16 is rotated by the drive of these worm wheel mechanisms, the piston nuts 17a and 17b that mesh with the threaded portions 15a and 15b of the tie rod 16 are moved, and the cylinder ff1f is moved.
The yokes 8a and 8b are moved toward and away from each other in the left and right direction via the support blocks 6a and 6b.
York 8a.

By changing the position of the center of rotation of the slide 118.11b, the distance between the tools 23a, 23b attached to the slide 118.11b can be adjusted in accordance with the width of the material 24.

Note that 25a and 25b are cross beams whose both ends are fixed to the frame 3, and the cross beam 25a.

The piston rods of counterbalance cylinders 26a and 26b fixed to the rear of slides 11a and 11b are connected to 25b, and the piston rods of counterbalance cylinders 26a and 26b are connected to the piston rods of counterbalance cylinders 26a and 26b, which constantly pull slides lla and llb toward the return side, thereby preventing noise during operation due to backlash in each operating part. I try not to do that.

In the opposed type press having such a configuration, when pre-processing the material 24, the drive device 1 is driven to drive the eccentric shaft 2 to rotate about the rotation axis 0. When the eccentric shaft 2 rotates, the connecting rod 4a pivotally connected to the eccentric shaft 2
, 4b has its rotation axis 0, . 0 are shifted by 180° around the rotation axis 0, so they move in opposite directions in the left and right directions, and this i movement becomes a reciprocating movement and is repeated. When the connecting rods 4a and 4b reciprocate in the left and right direction,
The yokes 8a and 8b are the pins 7 of the support blocks 6a and 6b.
a.

Since the slider 118.11b connected to the upper ends of the yokes 8a and 8b rotates around the guide member 5a,
.

10a, 5b, and move toward and away from each other in the left and right direction while being guided by 10b. Therefore, the tools 23a, 23b
Pressing of the material 24 is performed at.

The reaction force during press working is generated by the slides 11a, 11b, yokes 8a, 8b, support blocks 6a, 6b, cylinder tubes 18a, 18b, piston nuts 17a, 17.
b acts on the tie rod 16 as a tensile force, and at the same time acts on the connecting rods 4a, 4b as a compressive force. Therefore, there is no need for a conventional block for transmitting reaction force to the tie rod, and no excessive moment is applied to the frame 3. Therefore, the frame 3 can be made smaller. In addition, if the reaction force during machining is large and there is a risk of overloading the tie rod 16, a hydraulic cylinder with a safety valve or accumulator connected between the cylinder tubes 18a, 18b and the piston nuts 17a, 17b may be used. Since the chambers 22a and 22b are formed and constitute a so-called overload prevention mechanism, it is possible to deal with the problem by escaping the fluid.

In the above, when adjusting the distance between the tools 23a and 23b, the worm 2 is driven by a drive device (not shown).
18.21b. That is, when the worms 21a and 21b rotate, the tie rod 16 rotates via the worm wheels 20a and 20b. The screws fJ 15a and 15b of the tie rod 16 have piston nuts that restrict their own rotation.178.
17b is stuck, so the piston nuts 17a and 1
7b moves on the threaded portion 158.15b in the axial direction of the tie rod 16, and the moving force is the cylinder 5isa.

It is transmitted to the support blocks 6a, 6b via 18b.

For this reason, the yokes 3a and gb are connected to the pin 9a at the lower end,
Rotates around 9b as a fulcrum, and slides 11a and 11tl
The distance between the tools 23a and 23b is adjusted through the movement of the tools 23a and 23b.

In addition, in the present invention, since the tie rod 16 has a single structure, the position of the rail for the manipulator does not have to be installed at a high position avoiding the ring frame and multiple tie rods as in the past. It can be installed in a low position regardless of the position of 16. Therefore, the distance between the center of the tie rod 16 and the center of the tool can be shortened regardless of the height of the center of the tongue of the manipulator, and the device can be further downsized.

FIGS. 5 and 6 show other embodiments of the present invention, and the pins 7a of the support blocks 5a and 5b in the above embodiments,
The position of 7b and the position of the tie rod 16 are reversed on the inside and outside. That is, pins 7a and 7b are provided at the center of the support blocks 6a and 6b.

Yokes 8a and 8b are pivotally connected to 7b, while bins 7a and
Two tie rods 16 are inserted through both outer positions of 7b, and correspondingly two pairs of worm wheel mechanisms and overload prevention mechanisms are provided.

Even with such a system, the same effects as those of the embodiment described above can be achieved. Incidentally, FIG. 7 shows still another embodiment of the present invention, in which the internal and external relationship between the yoke 8b and the slide 111) in FIG. 6 is reversed.

By the way, in the previous embodiments, the yoke 8a.

Although the means for moving the rotation center of 8b has been described using a screw mechanism, it can also be performed using a fluid pressure cylinder system as shown in FIG. That is, the cylinders fi34a, 34b are attached to the support blocks 6a, 6b of the press shown in FIG. 2 or 5.
are positioned and fixed, and pistons 27a and 27b are fixed to both ends of the tie rod 16 with nuts 28a and 28b. 29a, 29b are guide bushes, 30a, 30
b, 31a, and 31b are sealing materials for the inviting portion to prevent fluid leakage, and 32a and 32b are sealing materials for both legs that serve the same purpose. Further, 33a and 33b are cylinder chambers 22a.
, 22b for sending or returning working fluid. This method can only operate in one direction, but the second
Cylinder fi 348, 34b is pulled back by the illustrated counterbalance cylinders 26a, 26b.

It should be noted that the present invention is not limited to the above-mentioned embodiment, but includes, for example, the connecting rod 4a.

4b to the center of the yokes 8a and 8b and the tie rod 16
may be provided on the lower end side of the yokes 8a, 811+, and the slides 11a, 11b may be provided on the lower end sides of the yokes 8a, 811+.
In addition, tie rod 16 is connected to the center of yoke 8a, 8b.
It may be provided on the upper @ side.Furthermore, in the above embodiment, the means for moving the center of rotation of the yoke was explained using a screw mechanism and a fluid pressure cylinder, but an eccentric mechanism or other moving mechanism may also be used. Of course, various changes may be made without departing from the gist of the claimed invention.

〔Effect of the invention〕

As explained above, according to the opposed press of the present invention,
By connecting the rotational centers of the yokes with a tie rod, the reaction force during press processing can be received between the rotational centers of the yokes, and the frame can be prevented from being affected by excessive press reaction force. /Since it does not require a block-like or ring frame-like block-equivalent member, it has excellent effects such as making the frame smaller and lighter, and the parts that receive the forging reaction force simpler, smaller, and lighter. do.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of a conventional opposed type press, Fig. 2 is a cutaway front view of the opposed type press of the present invention, and Fig. 3 is taken along m-m of Fig. 2.
4 is a view taken along the line IV-IV in FIG. 2, and FIG. 5 is a cutaway front view showing another embodiment of the present invention, and FIG.
- ■ Arrow view, Figure 6 is the Vl-Vl arrow view of Figure 5, Figure 7
The figure shows still another embodiment of the present invention, and is an explanatory diagram similar to FIG. 1JIJ6, and FIG. 8 is an explanatory diagram of still another embodiment. 1 is a drive device, 2 is an eccentric shaft, 4a and 4b are connecting rods, 6a and 6b are support blocks, and 7a. 7b is pin, 8a, 8b is yoke, 9a, 9b
is pin, 118.11b is slide, 1511.15b
16 is a tie rod, 17a and 17b are piston nuts, and 20a. 20b is a worm wheel, 218.21b is a worm, and 23a and 23b are tools. @1 Figure 3 Figure 4 Figure 5 Figure 6 ヱ Figure 8 2b

Claims (1)

[Claims] 1) In a facing type press in which a material is pressed between tools attached to the rotation MIII of the yokes by rotating the yokes arranged oppositely in opposite directions, A facing type press characterized by a tie rod provided between the rotation centers. 2) In a facing type press in which material is pressed between tools attached to the rotating ends of the yokes by rotating opposing yokes in opposite directions, a tie rod is placed between the centers of rotation of the yokes. , and while the yoke is rotating. A facing type press characterized by having a mechanism for moving between centers.