JP2572147B2 - Press mold for transfer press - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an improvement in a press die used in a transfer press.

2. Description of the Related Art In a transfer press equipped with a transfer feed device, as is well known, a plurality of sets of press dies for several steps are attached to a common slide and a bolster. A guide post protrudes from one of the guide posts, and a guide bush is provided on the other.The relative position accuracy between the upper and lower dies is controlled by sliding the guide posts and the guide bush to guide the upper and lower dies. I am trying to put out.

Problems to be Solved by the Invention In a conventional transfer press press die, particularly when a guide post is protrudingly provided on the lower die side, the gripper attached to the work transport feed bar and the guide post interfere with each other. Therefore, the installation position of the guide post is restricted.

For example, even if it is desired to install a guide post at a specific portion on the lower die due to the relationship between the shape of the workpiece to be formed and press processing conditions, when the trajectory of the gripper interferes with the guide post as described above, the position of the guide post is changed. I have to change it. As a result, required alignment between the upper and lower dies cannot be obtained, and there is a concern that the processing quality of the work may be affected.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to prevent interference with a gripper attached to a feed bar even when a guide post is installed at an arbitrary position on a lower die. It is another object of the present invention to provide a press-type structure which can avoid the problem.

Means for Solving the Problems The press die according to the present invention guides the upper and lower dies by sliding a guide post provided on one of the upper and lower dies and a guide bush provided on the other die. In a transfer press press die adapted to perform relative movement, the lower die is provided so as to be vertically movable, and when the upper die is raised, the guide post is lowered until its upper end surface is substantially flush with the lower die upper surface. A pusher pin is provided on the lower mold so as to be movable up and down in parallel with the guide post, and is provided between the guide post and the pusher pin.
An intermediate member that converts the downward displacement of the pusher pin at the time of lowering the upper die into the upward displacement of the guide post and raises the guide post to a position where it engages with the guide bush on the upper die side; And an elastic body for providing a return force downward of the post.

According to this structure, when the upper die is lowered, the guide post is raised accordingly to perform the intended function, while when the upper die is raised, the guide post is lowered accordingly. It can be stored in the lower mold without protruding above the lower mold. As a result, interference between the guide post and the gripper for transferring the work 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 show an embodiment of the present invention.
1 is a lower mold, 2 is an upper mold that moves up and down with respect to the lower mold 1, and 3 is a feed bar (transfer bar) that transports the work W.
Are respectively shown.

The feed bar 3 is provided with a gripper 4 for gripping a corner portion of the panel-shaped work W. The feed bar 3 is clamped, raised, advanced, lowered, and unclamped as shown in FIG. → Three-dimensional motion of return (retreat) will be performed.

The lower mold 1 is provided with a guide post 5 and a pusher pin 6 at a predetermined distance in a vertical posture. The guide post 5 and the pusher pin 6 are supported via a guide bush 7 or 8 so as to be vertically movable. I have.

Below the guide post 5 and the pusher pin 6, a seesaw link 9 is swingably supported as an intermediate member via a bracket 10 and a pin 11 so as to extend between them. One end of the link 9 is connected to the lower end of the guide post 5 via the elongated hole 12 and the pin 13 on the guide post 5 side, while the other end of the link 9 contacts the pusher pin 6 with its spherical lower end surface 6a. ing.

The link 9 is an elastic body such as a compression coil spring.
14, the pusher pin 6 protrudes above the lower die 1 and the guide post 5 when the upper die 2 is raised, as shown in FIG. The length of the guide post 5 and the pusher pin 6 is set so that the upper end surface of the guide post 5 is substantially flush with the upper surface of the lower die 1.

On the other hand, the upper die 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 contacts the pusher pin 6 is formed at a position corresponding to.

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

When the upper die 2 descends from the state shown in FIG. 1, the projection 16 contacts the pusher pin 6 and pushes it down during the downward movement, so that the link 9 is moved according to the descending operation of the pusher pin 6.
The guide post 5 is moved upward through.

When the upper mold 2 is still lowered, the guide post 5 is inserted into the guide bush 15 as shown in FIG. 4, and the guide post 5 guides the upper mold 2 while sliding with the guide bush 15,
Eventually, when the upper die 2 reaches the bottom dead center, the lower die 1 and the upper die 2 perform predetermined press working.

When the upper die 2 that has reached the bottom dead center starts to rise again, the elastic body
While the pusher pin 6 is gradually raised by the force of 14, the guide post 5 is lowered and returns to the state shown in FIG.

When the upper die 2 is raised, the gripper 4 as shown in FIGS. 2 and 3 is the clamping operation (X ₁ movement) and up operation (Z ₁ movement) along with the feed bar 3, whereby the workpiece W is picked up and gripped by the gripper 4. Workpiece W held by the gripper 4 is feed bar 3 advance operation (Y ₁ movement)
Is carried to the next step.

At this time, even if the gripper 4 moves along a locus that interferes with the position of the guide post 5 in the process of transporting the work W as shown in FIG. 2, the guide post 5 is moved as shown in FIG. Since it is substantially buried in the lower mold 1, there is no possibility that the movement of the gripper 4 is hindered.

Further, while the guide post 5 is set in the lower mold 1 as described above, the pusher pin 6 protrudes above the lower mold 1, but the pusher pin 6 is particularly restricted in position due to its function. Since it does not occur, it can be set at an arbitrary position, so that 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 elevating operation of the upper die. The guide post can be lowered to a position that does not interfere with the gripper, and the position of the guide post is not restricted by the trajectory of the gripper.

As a result, the guide post can be installed at any position on the lower die that is considered to be optimal under the pressing conditions, etc., without being affected by the path of the gripper, thereby improving the work press quality. I do.

[Brief description of the drawings]

FIG. 1 is a view showing an embodiment of the present invention, and is a sectional view taken along line AA of FIG. 2, FIG.
FIG. 4 is an explanatory view showing the movement trajectory of the feed bar, and FIG. 4 is a sectional view of the same when the upper die is descended. 1 ... lower mold, 2 ... upper mold, 3 ... feed bar, 4 ...
Gripper, 5 ... guide post, 6 ... pusher pin,
9 Link (intermediate member), 15 Guide bush, 16
... Projection, W ... Work.

Claims (1)

(57) [Claims] 1. A transfer press in which a guide post provided on one of the upper and lower dies and a guide bush provided on the other die are slid to guide the upper and lower dies to make a relative movement. In the press die, a guide post is provided on the lower die so that it can move up and down, and when the upper die rises, the upper end surface is lowered until it is almost flush with the upper surface of the lower die. A pusher pin that is provided so as to be able to move up and down and comes down by coming into contact with the lower surface of the upper die when the upper die is lowered, and is provided between the guide post and the pusher pin to guide the downward displacement of the pusher pin when the upper die is lowered. An intermediate member that converts the post into an upward motion displacement and raises the guide post to a position where the guide post engages the guide bush on the upper die side; An elastic body for providing a return force and a return force downward of the guide post, and a press die for a transfer press.