JPH09220699A - Die set device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To precisely machine even in a time of generating some change of the direction of lifting motion of a ram against a bolster. SOLUTION: In a die set device provided with a lower die supporting stand 21 fixed on a bolster side and an upper die supporting stand 25 which is supported on this lower die supporting stand 21 able to separate and move through a guide mechanism and which receives the moving force to the lower die supporting stand 21 side through a ram 15, any one side of a projecting spherical face washer or a recessing spherical face washer of being made in contact with a part of spherical face is fixed onto the upper end part of the upper die supporting stand 25, the other side of this projecting spherical face washer or the recessing spherical face washer is made in contact with a ram side member fixed on the ram.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a die set device for a press, and more particularly to a die set device which can be used for a C-type frame press to perform precise processing.

[0002]

2. Description of the Related Art C type frame press is
A generic term for a press machine in which a bolster (table) for fixing the lower mold is supported on the lower arm of the frame of the mold, and a ram (slide) for fixing the upper mold that moves back and forth with respect to this bolster is supported on the upper arm. The reaction force of processing is received by the upper arm and the lower arm of the C-shaped frame. This C-type frame press has a characteristic that it has better workability than a straight side frame press, but on the other hand, since the frame is C-shaped, the frame is easily deformed (easily opened) due to the load during processing. The deformation of the C-shaped frame causes a change in the direction of up-and-down movement of the ram (upper die) with respect to the bolster (lower die), so that the machining accuracy is reduced. Therefore, it has been difficult to use the C-type frame press for high precision processing. Further, not only the C-type frame press but also a relatively inexpensive press machine in which the direction of the vertical movement of the ram with respect to the bolster changes, has the same problem.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a die set device capable of performing precise machining even if the direction of the vertical movement of the ram with respect to the bolster changes slightly.

[0004]

SUMMARY OF THE INVENTION A die set device of the present invention includes a lower die support fixed to a bolster side; a lower die support supported on the lower die support via a guide mechanism, and a lower die via a ram. In a die set device provided with an upper die support that receives a moving force to the support side, one of a convex spherical washer and a concave spherical washer, which come into contact with a part of a spherical surface, is attached to the upper end of the upper die support. It is characterized in that it is fixed and the other of the convex spherical washer and the concave spherical washer is brought into contact with the ram side member fixed to the ram. The convex spherical washer or the concave spherical washer that contacts the ram side member is preferably slidable with respect to the ram member in a direction orthogonal to the up-and-down direction of the ram. According to this die set device, even if the change in the vertical movement of the ram slightly changes, the spherical washer absorbs the change in the direction and maintains the linear movement of the upper die support with respect to the lower die support.
Therefore, highly accurate processing can be performed.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 4 and 5 show an example of a C-type frame press. The C-shaped frame 11 is the upper arm 1.
2 and a lower arm 13, and the lower arm 13 has a bolster 14
Is fixed, and the ram 15 is supported by the upper arm 12.
The ram 15 reciprocates up and down with respect to the bolster 14 by, for example, a crank mechanism. Reference numeral 16 is a tie rod that connects the tips of the upper arm 12 and the lower arm 13.

The die set device 20 according to the present invention is inserted between the bolster 14 and the ram 15, and an embodiment thereof is shown in FIGS. 1 to 3. The die set device 20 includes a lower die support base 2 fixed on the lower arm 13.
1, the lower die support 21 has a lower die fixing surface 22
One side (open side of the C-shaped frame) has a pair of vertical guide posts 23, and the other side has a pair of vertical guide rails 24. An upper die supporting base 26 having an upper die supporting surface 25 has a bush 27 slidably fitted in the guide post 23 and a key member 28 slidably engaged with the guide rail 24. The table 21 is supported so as to be able to move up and down. A spring (not shown) is provided between the lower die support 21 and the upper die support 26 so as to bias the two in a direction to separate them.

A spherical washer unit 30 is provided at the upper end of the upper die support 26. This spherical washer unit 3
As shown in FIG. 3, 0 is a concave spherical washer 31 having a part 31 s of the concave spherical surface, and a concave spherical washer 31 s of the concave spherical washer 31.
Convex washer 32 having a part of a convex spherical surface 32s engaging with
And the concave spherical washer 31 is fixed to the upper die support 26. On the other hand, the convex spherical washer 32 has the ram 1 at its upper surface.
It simply contacts the lower surface of the ram side member 33 fixed to the ram 5, and is slidable in a direction orthogonal to the vertical direction of the ram 15. The concave spherical washer 31 and the convex spherical washer 32 are
It is possible to freely rotate along the contact surface between the spherical surfaces 31s and 32s, so that the upper die support 26 can rotate with respect to the ram side member 33. In order to ensure the free movement of the upper die support base 26 with respect to the ram side member 33, the upper die support base 26 and the ram side member 33 are not in contact with each other. A suspension rod 36 that is loosely fitted in a play hole 35 formed in the ram side member 33 is provided on the upper die support 26. A spring receiver 37 fixed to the upper end of the suspension rod 36 and a ram side. Member 3
The contact state between the concave spherical washer 31 and the convex spherical washer 32 is maintained by the compression coil spring 38 inserted between the concave spherical washer 31 and the convex spherical washer 32. The spring receiver 37 and the compression coil spring 38 are unitized mainly so that the concave spherical washer 31 and the convex spherical washer 32 are not separated when the die set device 20 is moved out of the space between the bolster 14 and the ram 15. To act. The concave spherical washer 31 is replaced by an air cylinder device or a hydraulic cylinder device instead of the spring receiver 37 and the compression spring 38.
It is also possible to form a unit so that the convex spherical washer 32 and the convex spherical washer 32 are not separated from each other.

The die set device 20 having the above structure is inserted between the bolster 14 and the ram 15, the lower die support 21 is fixed to the bolster 14, and the ram side member 33 is fixed to the ram 15. The lower die fixing surface 22 of the lower die supporting base 21 and the upper die supporting surface 25 of the upper die supporting base 26 respectively support the lower die and the upper die for press working. When the ram 15 is reciprocally moved with respect to the bolster 14 and press-worked after the above-mentioned setting is completed, the descending force of the ram 15 is transmitted to the concave spherical washer 31 via the convex spherical washer 32, and the upper die supporting base is supported. 26 descends. At this time, if the direction of the vertical movement of the ram 15 changes as a result of the upper arm 12 and the lower arm 13 of the C-shaped frame 11 opening slightly, the concave spherical washer 31 and the convex spherical washer 3
The spherical engagement of 2 changes the contact position according to the change of the direction, and transmits only the force perpendicular to the bolster 14 to the upper die support 26. At this time, the ram side member 33
The concave spherical washer 32 slides with respect to the ram side member 33 when a force greater than a certain value in the sliding direction is applied between the convex spherical washer 32 and the convex spherical washer 32. For this reason, the upper die support 21 performs a correct vertical movement along the guide posts 23 and the guide rails 24 even when the upper arm 12 and the lower arm 13 of the C-shaped frame 11 are slightly opened. For this reason, even if there is a slight change in the ascending / descending direction of the ram 15, the die set device 20 can perform highly accurate press working.

Although a certain effect can be expected even if the convex spherical washer 32 is fixed to the ram side member 33, if it is slidable as in the illustrated embodiment, the force in the direction orthogonal to the vertical direction of the ram 15 is generated. The upper die support 26 is rarely affected.

[0010]

As described above, according to the die set apparatus of the present invention, even if the moving direction of the ram which moves up and down with respect to the bolster is slightly changed, the spherical washer absorbs the change, so that it is highly accurate. It can be pressed.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a die set device of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is an enlarged cross-sectional view showing a specific example of a spherical washer portion.

FIG. 4 is a front view of a C-type frame press.

FIG. 5 is a side view of FIG. 4;

[Explanation of symbols]

 11 C-type frame 12 Upper arm 13 Lower arm 14 Bolster 15 Ram 20 Die set device 21 Lower die support 22 Lower die fixing surface 23 Guide post 24 Guide rail 25 Upper die support surface 26 Upper die support 27 Bush 28 Key member 30 Spherical washer unit 31 Concave spherical washer 31s Concave spherical surface 32 Convex spherical washer 32s Convex spherical surface 33 Ram side member 35 Play hole 36 Suspension rod 37 Spring bearing 38 Compression coil spring

Claims (2)

[Claims] 1. A lower die supporting base fixed to the bolster side; supported by the lower die supporting base so as to be movable toward and away from the lower die supporting base via a guide mechanism, and a moving force to the lower die supporting base side via a ram. In a die set device having an upper die support for receiving, one of a convex spherical washer and a concave spherical washer that are in contact with a part of a spherical surface is fixed to the upper end of the upper die support, and the convex spherical washer is used. And a concave spherical washer, the other of which is brought into contact with a ram side member fixed to the ram. 2. The die set device according to claim 1, wherein the convex spherical washer or the concave spherical washer that comes into contact with the ram side member is slidably movable with respect to the ram member in a direction orthogonal to a vertical direction of the ram.