JPH0677875B2 - Opposing press - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a facing press for pressing metal and non-metal materials.

[Prior Art] FIG. 9 shows an outline of a conventional opposed type press, in which eccentric shafts b and b'are drivably supported by frames a and a'divided left and right, and the eccentric shaft b. Connecting rods c and c'directed to the line direction are pivotally attached to the lines b and b ', and the tip ends of the connecting rods c and c'are rotated in the left and right directions about axes e and e'. The lower ends of the yokes d, d ′ are pivotally attached, and the upper and lower ends of the yokes d, d ′ are molds f, f ′ that can slide left and right.
Are connected, and the fluid pressure cylinders g, g'are operated to change the positions of the shafts e, e ', so that the space between the molds f, f'is adjusted according to the width of the workpiece h. Is ready to go.

When the workpiece h is machined, the drive devices i, i'are driven to rotate the eccentric shafts b, b'through the pinions j, j'and the gears k, k ', and the connecting rods c, c'to the left and right. By moving in opposition, the yokes d and d ′ are simultaneously moved inward and outward in the width direction of the workpiece h, and the workpiece h is pressed. In addition, l and l ′ are bevel gears, and m is a connecting shaft.

However, in such a conventional opposed press,
Since the frames a and a'are provided separately on the left and right, an excessive moment due to the reaction force during press working causes
acting on a ', and therefore having to make the frames a, a' rigid, results in a larger frame a, a ',
There is a problem that the entire device becomes large.

In the past, as shown in Japanese Utility Model Application No. 56-24559, a structure has been proposed in which the reaction force at the time of press working is received by a combination of a plurality of tie rods and blocks or by a ring-shaped frame, but in the former case. In order to counter the bending force, the block must be strong, while in the latter case, a moment is generated at the boundary between the column and the block, which corresponds to the tie rod, so that the entire equipment is eventually large. Is becoming a factor.

[Problems to be Solved by the Invention] An object of the present invention is to provide a lightweight, small-sized and solid opposed press having a structure in which a reaction force due to press working does not directly act on the frame.

[Means for Solving the Problems] In the opposed type press of the present invention, the yokes 8a and 8b, to which the driving device 1 is connected at the other end side, are arranged so as to face each other so that the yoke 8 can be driven with one end as the center of rotation, and the yoke is also arranged. A slide 11 in which the middle part of 8a, 8b is horizontally opposed to each other and is movable toward and away from each other.
Pins 12a and 12b are connected to a and 11b, and tools 23a and 23b are attached to the facing surfaces of the slides 11a and 11b so that press working can be performed between the tools 23a and 23b. A tie rod 16 is arranged across the center of motion, and a support block 6a in which a cylinder cylinder 18a is continuously provided on one end side is externally fitted to one end side of the tie rod 16 with the cylinder cylinder 18a outside and the cylinder cylinder 18a and the tie rod 16 And a piston nut 17a or a piston 31a are interposed between them to form a cylinder chamber 22a, and a cylinder block 18b is connected to one end side of the support block 6b.
Is externally fitted to the other end side of the tie rod 16 with the cylinder tube 18b facing outside, and a piston nut 17b or a piston 31b is interposed between the cylinder tube 18b and the tie rod 16 to form a cylinder chamber 22b, and the yoke 8a is formed. The center of rotation of the support block 6a is connected to the support block 6a, and the center of rotation of the yoke 8b is connected to the support block 6b by pins 7a and 7b, respectively.
A yoke having a moving device for moving the 6b along the tie rod 16 in the approaching and separating directions, and also having the driving device 1 connected to the other end so as to be driven with one end as a rotation center.
8a, 8b are arranged to face each other, the intermediate portion of the yoke 8a, 8b is connected to the pins 11a, 12b to slides 11a, 11b provided facing each other in the horizontal direction and capable of moving toward and away from each other, and the slide 11a,
Tools 23a, 23b are attached to the facing surfaces of 11b so that press working can be performed between the tools 23a, 23b, and the yokes 8a, 8b
Tie rods 16 are arranged between the centers of rotation of the tie rods 16, cylinder cylinders 18a and 18b are externally fitted to both end portions of the tie rods 16, and a piston nut 17a is provided between the tie rod 16 and a portion of the cylinder cylinder 18a opposite to the cylinder cylinder 18b side. Alternatively, the cylinder chamber 22a is formed by interposing the piston 31a, and the piston nut 17b or the piston 31b is interposed between the tie rod 16 and a portion of the cylinder barrel 18b on the side opposite to the cylinder barrel 18a.
b, a support block 6a is attached to a portion of the cylinder tube 18a on the cylinder tube 18b side, and a support block 6b is attached to a portion of the cylinder tube 18b on the cylinder tube 18a side so as to be rotatable in the vertical direction. The center of rotation is supported by the support block 6a, and the center of rotation of the yoke 8b is supported by the support block 6b.
Connect the support blocks 6a, 6b with the tie rod 16
It has a structure equipped with a moving device that can move in the direction of approaching and leaving along.

[Operation] Therefore, the reaction force during processing can be received by the tie rod. Further, the force acting on each point of the yoke can be reduced to about half as compared with the conventional one. Further, since the cylinder chambers 22a and 22b that function as an overload prevention mechanism are formed, the fluid escapes from the cylinder chambers 22a and 22b even when the reaction force during processing is large and the tie rod 16 may be overloaded. Can be dealt with.

[Embodiment] As shown in FIG. 1 to FIG. 3, it can be driven by the drive device 1 (rotational axis O) and is equal in size from the rotational axis O 180
The eccentric shaft 2 having the eccentric shafts O ₁ and O ₂ deviated from each other is supported at the center of the lower portion of the frame 3, and the connecting rods 4a and 4b directed in the left-right direction are pivotally attached to the eccentric shaft 2 in a telescopic manner. . At the upper position of the connecting rods 4a, 4b, support blocks 6a, 6b are arranged so as to be slidable in the left-right direction between the upper and lower guide members 5a, 5a and 5b, 5b, and the support blocks 6a, 6b are provided. Protruding pins 7a, 7b on the front and rear outer surfaces,
The upper ends of the yokes 8a, 8b are pivotally attached to the pins 7a, 7b so as to rotate in the left-right direction about the pins 7a, 7b. Also, the yoke 8a,
At the lower end of 8b, the tips of the connecting rods 4a, 4b are pivotally attached by pins 9a, 9b, and at the center of the yokes 8a, 8b,
Slides 11a, 11b guided so as to be slidable in the left-right direction between the guide members 10a, 10b provided on the upper and lower sides and on the side surfaces are connected by pins 12a, 12b. The slides 11a and 11b have windows 13a,
Blacks 14a and 14b are fitted in the windows 13a and 13b such that the black portions 14a and 14b can be moved up and down.
It is attached to a and 12b. Therefore, the pins 7a, 7 of the yokes 8a, 8b
The vertical displacement of the pins 12a, 12b due to the rotation (fan-shaped motion) about b is absorbed by the elevation of the blocks 14a, 14b.

In addition, the support blocks 6a and 6b have screw portions 15a and 1
Insert the tie rod 16 having 5b, and the tie rod 16
Piston nuts 17a, 17b are screwed onto the screw parts 15a, 15b of
Cylinder cylinders 18a, 18b connected to the opposite end portions of the support blocks 6a, 6b are slidably fitted to the piston nuts 17a, 17b, and further, rings 19a, 19b are provided inside the rear parts of the cylinder cylinders 18a, 18b. When the working fluid is pressure-fed to the cylinder chambers 22a, 22b formed between the piston nuts 17a, 17b and the cylinder cylinders 18a, 18b, the ring 1
9a, 19b hit the piston nuts 17a, 17b and prevent them from moving further.

Further, the piston nuts 17a, 17b prevent rotation of the ring members 27a, 27b fixed to the cylinder cylinders 18a, 18b and the rings 19a, 19b via splines (or keys, etc.) 28a, 28b to prevent rotation in the axial direction. It is engaged so that it can slide relative to. A fluid pressure supply device and a safety valve or accumulator (not shown) are connected to the cylinder chambers 22a and 22b.

With such a structure, if the pressure corresponding to the maximum working force is applied to the cylinder chambers 22a, 22b during the press working, the cylinder chambers 22a, 22b can be operated during the pressing work under the normal working force. The compression of the fluid inside does not occur, and the spring constant of the entire device can be kept large. Further, if the pressure in the cylinder chambers 22a, 22b is set to a pressure lower than the pressure corresponding to the maximum processing force or atmospheric pressure, the cylinder chambers 22a, 22b
Although the fluid in 22b is compressed, the structure of the rear portions of the cylinder tubes 18a and 18b can be made lighter and simpler. However, in this case as well, the safety valve must be set to an appropriate pressure equal to or higher than the pressure corresponding to the maximum pressing load.

Further, the worm wheel 20 is attached to both ends of the tie rod 16.
Attach the a and 20b so that the tie rod 16 by the processing force can be extended via a spline or the like.
The worms 21a and 21b driven by a drive device (not shown) are engaged with a and 20b, and the tie rod 16 is rotated by the drive of these worm wheel mechanisms, so that the piston nut 17a that meshes with the threaded portions 15a and 15b of the tie rod 16. , 17b
The cylinder cylinders 18a, 18b, the support block 6a,
By moving the yokes 8a and 8b toward and away from each other via the 6b in the left-right direction and changing the position of the center of rotation of the yokes 8a and 8b, the distance between the tools 23a and 23b attached to the slides 11a and 11b is set to the material 24. It is configured so that it can be adjusted according to the width.

25a and 25b are cross beams fixed to the rear ends of the slides 11a and 11b, and the cross beams 25a and 25b are connected to piston rods of counter balance cylinders 26a and 26b fixed to the frame 3, The slides 11a and 11b are constantly pressed against the return side so that no noise is generated during operation due to rattling of each operating part.

In the opposed press having such a structure, when the material 24 is pressed, the drive device 1 is driven to drive the eccentric shaft 2
Is rotationally driven around the rotation axis O. When the eccentric shaft 2 rotates, the connecting rods 4a, 4b pivotally attached to the eccentric shaft 2
Since their rotational axes O ₁ and O ₂ are offset by 180 ° with respect to the rotational axis O, they move in opposite directions in the left-right direction, and this movement is repeated as a reciprocating motion. When the connecting rods 4a, 4b reciprocate in the left-right direction, the yokes 8a, 8b move to the support blocks 6a,
Since the pins 7a and 7b of 6b rotate about the slides 11a and 11b connected to the central portions of the yokes 8a and 8b, the slides 11a and 11b move toward and away from each other in the left-right direction while being guided by the guide members 10a and 10b. Therefore, the material 24 is pressed by the tools 23a and 23b.

The reaction force during press working is slides 11a, 11b and yokes 8a, 8
b, acting as a tensile force on the tie rod 16 via the support blocks 6a, 6b, the cylinder cylinders 18a, 18b, and the piston nuts 17a, 17b, and at the same time acting as a tensile force on the connecting rods 4a, 4b. Therefore, a block for transmitting a reaction force to the tie rod as in the conventional case is not required, and an excessive moment is not applied to the frame 3. Therefore, the frame 3 can be downsized. Further, the tools 23a and 23b are connected to the yokes 8a and 8b.
Since it is provided at the center of the, compared to the case where a tool is provided at the rotating end of the yoke as in the conventional example shown in FIG. 9,
The force acting on each part of the yoke is reduced to about half, the weight of each member is significantly reduced, and the cost and the size of the device can be reduced. Further, when the reaction force during processing is large and there is a risk of overloading the tie rod 16, a hydraulic cylinder chamber 22a in which a safety valve or accumulator is connected between the cylinder cylinders 18a, 18b and the piston nuts 17a, 17b. , 22b are formed and a so-called overload prevention mechanism is configured, so that it can be dealt with by the escape of the fluid. Further, a piston nut 1 for moving the cylinder chambers 22a, 22b, which function as an overload prevention mechanism, toward and away from the rotation centers (pins 7a, 7b) of the yokes 8a, 8b.
7a, 17b and one along the tie rod 16 yoke 8a, 8
Since the center of rotation of b is made to move linearly and slowly, there is no problem in inflowing or outflowing the working fluid into the cylinder chambers 22a, 22b, and an unreasonable force acts on each component structurally. It is possible to design with high reliability.

In the above, when adjusting the distance between the tools 23a and 23b, the worms 21a and 21b are driven by a drive device (not shown).
Obtained by rotating. That is, worm 21
When a and 21b rotate, the tie rod 16 rotates via the worm wheels 20a and 20b. Screw part 15a, 15b of tie rod 16
Is a piston nut 17a, 17 whose rotation is restricted.
Since b is screwed, the piston nuts 17a and 17b
The tie rod 16 moves on the shafts 15a, 15b in the axial direction, and the moving force is transmitted to the support blocks 6a, 6b via the cylinder tubes 18a, 18b. Therefore, the yokes 8a, 8b rotate about the pins 9a, 9b at the lower end as fulcrums, and the tool 23 is moved by the movement of the slides 11a, 11b.
The distance between a and 23b is adjusted.

FIG. 4 and FIG. 5 show another embodiment of the present invention, in which the vertical displacement due to the rotation of the yokes 8a, 8b is applied to the windows 13a, 13b and the blocks 14a, 13b provided on the slides 11a, 11b. In the present method, it is absorbed by the support blocks 6a, 6b on the upper ends of the yokes 8a, 8b. That is, the cylinder cylinders 18a and 18b are formed separately from the support blocks 6a and 6b, and the support blocks 6a and 6b of the cylinder cylinders 18a and 18b are formed.
Semi-cylindrical curved surface seats 29a, 29b are provided on the side surface, and supporting blocks 6a, 6b formed with corresponding curved surfaces are brought into contact with the curved seats 29a, 29b via bushes 30a, 30b, while the yokes 8a, 8b are provided. The pins 12a, 12b of are directly attached to the slides 11a, 11b. In the drawings, only the left side (subscript a side) of the device is shown.

Therefore, in the case of this method, the vertical displacement due to the rotation of the yokes 8a, 8b is absorbed by the support blocks 6a, 6b sliding in the plane perpendicular to the curved seats 29a, 29b.

6 and 7 show another embodiment of the present invention in which the positions of the pins 7a and 7b of the support blocks 6a and 6b and the position of the tie rod 16 in the above embodiment are reversed inside and outside. .
That is, the pins 7a and 7b are provided at the center of the support blocks 6a and 6b, the yokes 8a and 8b are pivotally attached to the pins 7a and 7b, and the two tie rods 16 are inserted into both outer positions of the pins 7a and 7b. In response to this, two pairs of worm wheel mechanism and overload prevention mechanism are provided. The frame 3 is divided into left and right.

Even with such a system, the same operational effects as those of the above-described embodiment can be obtained.

By the way, in the above-described embodiments, the adjustment of the distance between the tools 23a and 23b has been described by the screw mechanism on the rod 16 side, but it is also possible to perform the adjustment by the fluid pressure cylinder system as shown in FIG. That is, the supporting blocks 6a, 6 of the press shown in FIG. 2 or FIG.
While positioning and fixing the cylinder tubes 18a and 18b to b,
Install pistons 31a and 31b on both sides of the tie rod 16 and nuts 32a and 32b.
Fix with. 33a, 33b are guide bushes, 34a, 34b, 35a, 3
5b is a sealing material for the sliding part that prevents fluid leakage.
b is a sealing material for the fixed part having the same purpose. 37a, 37b are pipes for sending or returning the working fluid to the cylinder chambers 22a, 22b. In this system, the counter balance cylinders 26a, 26 shown in FIGS. 1 and 2 can operate only in one direction.
The cylinder cylinders 18a and 18b are pushed back by b.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and it is needless to say that various modifications can be made without departing from the gist of the present invention.

As described above, according to the facing type press of the present invention,
The force acting on each point of the yoke can be reduced to about half of the conventional one, and the rotation centers of the yoke are connected by tie rods,
The reaction force at the time of press working is received between the rotation centers of the yokes so that the frame side is not affected by the excessive press reaction force.
Furthermore, since no block equivalent member of the conventional tie rod / block type or ring frame type is required, the frame can be made smaller and lighter, and the member that receives the forging reaction force can be made simpler, smaller and lighter, and overloaded. Since it has a cylinder chamber that functions as a prevention mechanism, it is possible to deal with an excessive force that acts during machining due to the outflow of working fluid from the cylinder chamber, and it is possible to reliably prevent the parts from breaking. Be effective.

[Brief description of drawings]

FIG. 1 is a cutaway front view of an opposed press of the present invention, FIG. 2 is a view taken along the line II-II in FIG. 1, FIG. 3 is a view taken along the line III-III in FIG. 1, and FIG. FIG. 5 is a cutaway front view showing another embodiment of the invention, FIG. 5 is a view taken along the line VV of FIG. 4, FIG. 6 is a cutaway front view of yet another embodiment of the present invention, and FIG. VI in Figure 6
FIG. 8 is a partial view showing yet another embodiment of the present invention, and FIG. 9 is a schematic view showing an example of a conventional opposed type press. 1 is a drive device, 2 is an eccentric shaft, 4a, 4b are connecting rods, 6a, 6b are support blocks, 7a, 7b are pins, 8a, 8b are yokes, 9a, 9b are pins, 11a, 11b are slides, 12a, 12b is a pin, 15a and 15b are threaded portions, 16 is a tie rod, 17a and 17b are piston nuts, 18a and 18b are cylinder cylinders, 20a and 20b are worm wheels, 21a and 21b are worms, 22a and 22b are cylinder chambers,
23a and 23b are tools, 29a and 29b are spherical seats, 30a and 30b are bushes, and 31a and 31b are pistons.

Claims (2)

[Claims] 1. A yoke (8a) (8b) having a driving device (1) connected to the other end so as to be able to drive about one end as a center of rotation, and the yoke (8a) (8b) is arranged to face the middle part of the yoke (8a) (8b). Part
Pins (12a) and (12b) are connected to slides (11a) and (11b) that are horizontally opposed to each other and can move toward and away from each other, and tools (23a) and (23b) are attached to the facing surfaces of the slides (11a) and (11b). ) Is attached so that press working can be performed between the tools (23a) and (23b), and a tie rod (16) is arranged across the rotation centers of the yokes (8a) and (8b), and one end side is provided. Attach the support block (6a) with the cylinder tube (18a) in series to the tie rod (1
6) The cylinder cylinder (18a) is externally fitted to one end side of 6), and the piston nut (17a) or the piston (31a) is interposed between the cylinder cylinder (18a) and the tie rod (16) to form a cylinder chamber. (22a) is formed, and a support block (6b) in which a cylinder tube (18b) is continuously provided on one end side is externally fitted to the other end side of the tie rod (16) with the cylinder tube (18b) facing outside. A piston nut (17b) or piston (31b) is interposed between the cylinder (18b) and the tie rod (16) to form a cylinder chamber (22b), and the yoke (8
The rotation center of a) is connected to the support block (6a), and the rotation center of the yoke (8b) is connected to the support block (6b) by pins (7a) and (7b), respectively. 6b)
An opposed type press equipped with a moving device that moves the tie rod in the direction of approaching and separating along the tie rod (16). 2. A yoke (8a) (8b) having a driving device (1) connected to the other end so as to be driven around one end as a center of rotation, and yokes (8a) (8b) are arranged opposite to each other, and the middle of the yoke (8a) (8b). Part
Pins (12a) and (12b) are connected to slides (11a) and (11b) that are horizontally opposed to each other and can move toward and away from each other, and tools (23a) and (23b) are attached to the facing surfaces of the slides (11a) and (11b). ) Is attached so that press working can be performed between the tools (23a) and (23b), and a tie rod (16) is arranged across the rotation centers of the yokes (8a) and (8b). 16)
Cylinder cylinders (18a) and (18b) are fitted on both ends of the cylinder nut (17a) or the piston (31a) between the tie rod (16) and a portion of the cylinder cylinder (18a) opposite to the cylinder cylinder (18b) side. ) Is formed to form the cylinder chamber (22a), and the piston nut (17) is provided between the tie rod (16) and a portion of the cylinder tube (18b) on the side opposite to the cylinder tube (18a).
b) or the piston (31b) with the cylinder chamber (22
b) forming cylinder cylinder (18a) cylinder cylinder (18b)
Support block (6a) on the side part and cylinder tube (18b)
Support blocks (6b) are attached to the cylinder tube (18a) side of each of the yokes (8a) so as to be vertically rotatable, and the center of rotation of the yoke (8a) is attached to the support block (6a) and the yoke (8b).
Pins (7a) on the support block (6b) at the center of rotation of
An opposed type press equipped with a moving device which is connected by (7b) and moves the support blocks (6a) and (6b) in the directions of approaching and separating along the tie rods (16).