JPH0441024A - Press die for transfer press - Google Patents

Abstract

PURPOSE:To allow to set the guide post on the arbitrary position of the lower die and to improve the press working quality of the work by making the guide post to move up and down through the pusher pin and the intermediate component corresponding to the up and down movement of the upper die. CONSTITUTION:When the upper die 2 descends, the projection 16 contacts with the pusher pin 6 and pushes it down on the way of the above descent, so the guide post 5 is elevated through the link 9 corresponding to the descending movement of the pusher pin 6. When the upper die 2 descends further, the guide post 5 is inserted in the guide bush 15, the guide post 5 guides the upper die 2 while sliding in the guide bush 15, and finally, the prescribed press working is executed with the lower die 1 and the upper die 2 by reaching the upper die 2 to the lower dead point. When the upper die reaching the lower dead point starts again to elevate, the pusher pin 6 elevates gradually with the force of the elastic body 14 and by following this movement, the guide post 5 descends and returns to the original state.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to improvements in press dies used in transfer press machines.

As is well known, in a transfer press equipped with a conventional transfer feed device, multiple sets of press molds for several process bones are attached to a common slide and bolster, so each set of press molds has an upper and a lower mold. A guide post is provided protruding from one of the two and a guide bush is provided on the other.The guide post and the guide bush slide to guide the upper and lower molds and move them relative to each other. I am trying to achieve positional accuracy.

Problems to be Solved by the Invention In conventional press dies for transfer presses, especially when a guide post is provided protruding from the lower die side, the gripper attached to the feed bar for conveying the workpiece interferes with the guide post. Therefore, the installation position of the guide post is restricted.

For example, even if you want to install a guide post at a specific location on the lower mold due to the shape of the workpiece to be molded or the pressing conditions, etc., if the guide post interferes with the trajectory of the tool as described above, the guide The position of the post will have to be changed. As a result, the required alignment between the upper and lower molds cannot be obtained, and there is a concern that the processing quality of the workpiece will be affected.

The present invention was made in view of the above problems.
The purpose of this is to provide a press die structure in which interference with a gripper attached to a feed bar can be avoided even when a guide post is installed at an arbitrary position on a lower die.

Means for Solving the Problems The press mold of the present invention guides the upper and lower molds by sliding a guide post provided on one of the upper and lower molds and a guide bush provided on the other mold. In a press die for a transfer press, the lower die is provided with a guide post that can move up and down, and the lower die is provided with a guide post that is parallel to the guide post and moves up and down in response to the lifting and lowering movements of the upper die. the pusher pin, the guide post and the
.

The intermediate member is provided between the pusher pin and the pusher pin and converts the vertical displacement of the pusher pin into the vertical displacement of the guide post.

Function According to this structure, when the upper die lowers, the guide post rises and performs its intended function.On the other hand, when the upper die rises, the guide post descends accordingly, for example, when the guide post It can be stored within the lower mold without protruding above the lower mold. As a result, interference between the guide post and the gripper for transporting the workpiece can be avoided. Moreover, since the pusher pin can be installed at any position, there is no problem of interference between the pusher pin and the gripper.

Embodiment FIGS. 1 and 2 are diagrams showing an embodiment of the present invention.
2 represents a lower mold, 2 represents an upper mold that moves up and down with respect to the lower mold 1, and 3 represents a feed bar (transfer bar) that conveys a workpiece W, respectively.

The feed bar 3 is provided with a gripper 4 for gripping a part of the corner of the panel-shaped workpiece W, and the feed bar 3 moves from clamp to a, b to advance (forward) to down as shown in Fig. 3. → Unclamp → Return (backward) three-dimensional movement.

A guide post 5 and a pusher pin 6 are provided in a vertical position on the lower die 1 with a predetermined distance apart, and these guide posts 5 and pusher pins 6 are supported so as to be vertically movable via a guide bar, a surer or a pusher pin 8. There is.

Below the guide post 5 and pusher pin 6, a seesaw-type link 9 is swingably supported as an intermediate member via a bracket 10 and a pin 11 so as to span between the two. One end of the link 9 is connected to the lower end of the guide post 5 via an elongated hole 12 and a pin 13 on the guide post 5 side, while the other end of the link 9 is connected to the pusher pin 6.
The spherical lower end surface 6a is in contact with the spherical lower end surface 6a.

The link 9 is an elastic body 1 such as a compressed fill spring.
4 exerts a biasing force in the clockwise direction in FIG. The lengths of the guide posts 5 and the pusher pins 6 are set so that their upper end surfaces are substantially flush with the upper surface of the lower mold 1.

On the other hand, the upper mold 2 is provided with a guide bush 15 at a position corresponding to the guide post 5, and a pusher pin 6.
A projection 16 that abuts the pusher pin 6 is located at a position corresponding to the
is formed.

In such a press die structure, the workpiece W conveyed by the feed bar 3 from the previous process is positioned on the lower die 1, and the upper die 2 is tilted to perform predetermined forming or processing. .

When the upper mold 2 descends from the state shown in FIG.
The guide post 5 rises through the.

When the upper die 2 continues to descend, the guide post 5 is inserted into the guide bush 15 as shown in FIG. When the upper die 2 reaches the bottom dead center, the lower die 1 and the upper die 2 perform a predetermined pressing process.

When the upper die 2 that has reached the bottom dead center begins to rise again, the elastic body 1
While the pusher pin 6 gradually rises due to the force 4, the guide post 5 descends and returns to the state shown in FIG.

When the upper mold 2 rises, the gripper 4 and the feed bar 3 perform a clamping operation (X
, movement in direction) and a-2b movement (movement in z1 direction)
As a result, the workpiece W is scooped up and gripped by the gripper 4. The workpiece W gripped by the gripper 4 is conveyed to the next process by the feed bar 3 performing an advance operation (movement in the Y direction).

At this time, even if the gripper 4 moves along a trajectory that interferes with the position of the guide post 5 during the conveyance process of the workpiece W as shown in FIG. 2, the guide post 5 will move as shown in FIG. Since it is substantially buried in the lower die 1, the gripper 4
It is impossible to impede the movement of the

Furthermore, as described above, the guide post 5 is housed within the lower mold 1, while the pusher pin 6 protrudes above the lower mold 1, but the pusher pin 6 is subject to particular positional restrictions due to its function. Therefore, the pusher pin 6 and the gripper 4 can be set at any position, and there is no problem of interference between the pusher pin 6 and the gripper 4.

Effects of the Invention As described above, according to the present invention, the guide post is moved up and down via the pusher pin and the intermediate member in accordance with the raising and lowering movement of the upper die, so that when the workpiece is conveyed by the feed bar, the feed bar side The guide post can be lowered to a position where it does not interfere with the gripper, and the position of the guide post is no longer restricted by the trajectory of the gripper.

As a result, without being affected by the trajectory of the gripper,
The guide post can be installed at any position on the lower mold that is considered optimal based on the press processing conditions, etc.
The press processing quality of the workpiece is improved.

[Brief explanation of drawings]

Fig. 1 is a diagram showing one embodiment of the present invention, and is a sectional view taken along line A-A in Fig. 2, Fig. 2 is a plan view of the lower mold, and Fig.
The figure is an explanatory diagram showing the motion locus of the feed bar, and FIG. 4 is a sectional view when the upper mold is lowered. 1...lower die, 2...upper die, 3...feed bar, 4
...Gripper, 5...Guide post, 6...Pusher pin, 9...Link (intermediate member), 15...Guide block/nonyu, 16...Protrusion, W...Work. Figure 1 outside 3 1-11 lower mold 2--1 upper mold 5--π ID BOST 6--P1 Rishabishi 9-1-RISIK 15-11 GUIDE AWASH

Claims (1)

[Claims] (1) A press mold for a transfer press in which the upper and lower molds are guided and moved relative to each other by sliding between a guide post provided on one of the upper and lower molds and a guide bush provided on the other mold. , a guide post is provided on the lower mold so that it can move up and down, a pusher pin is provided on the lower mold in parallel with the guide post and moves up and down in accordance with the lifting and lowering movement of the upper mold, and a link between the guide post and the pusher pin is provided. A press mold for a transfer press, comprising: an intermediate member that converts vertical displacement of a pusher pin into vertical displacement of a guide post.