JPH02217122A - Transfer bar dividing method - Google Patents

Abstract

PURPOSE:To divide a transfer bar without forced unclamping by dividing plurally into both end bars and a middle bar, dividing and connecting each bar with connectors so as to separate freely when the transfer bar of transfer press is divided. CONSTITUTION:After the transfer bar 6 is moved in the unclamping direction at the forced advance position, the bar is lowered at the unclamping position of normal operation time. Then the connecting connector 8 for an end bar 61 and the middle bar 62 is released and the end bar 61 and the middle bar 62 connected to a feed lever 11 are separated by pulling the other end bar 63 with a bar connector 12. Hooks projecting on the middle bar 62 are engaged to a locating pin 9 provided on the die set side of the lower die. The middle bar 62 and the other end bar 63 are separated by pulling still more the transfer bar 6 with the bar disconnector 12 under that state.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for dividing a transfer bar provided in a transfer press.

[Conventional technology]

Conventional transfer presses are equipped with a pair of transfer bars that transport workpieces within the press body.

The transfer bars are arranged in parallel in the conveying direction of the workpiece, and are moved in two or three dimensions in synchronization with the operation of the press body by power taken out from the press body.

In addition, the transfer bar mentioned above can be divided into multiple parts in the longitudinal direction, and by transporting a part of the transfer bar out of the press body together with the lower die set when replacing the mold, the fingers can be replaced by external setup. ing.

[Problem to be solved by the invention]

In the above-mentioned conventional transfer press, when dividing the transfer bar, first the transfer bar is forcibly unclamped to the outside from the unclamping position, and then lowered at that position to lock the central bar a, and in this state, the bar is separated. As shown in Fig. 5, pull the bar C at one end using the connector b and divide it from the center bar a.
Thereafter, the other end bar e is pulled by the feed lever d, and the bar is divided from the center bar a.

For this reason, when dividing the transfer bar, a large space is required in the dividing direction of the transfer bar, making the device itself large.In addition, since the transfer bar is forcibly unclamped, when using a mold with guide posts between the upper and lower molds, it is difficult to force unclamp the transfer bar. When clamping, it was necessary to install the guide post in a position where the transfer bar would not interfere with the guide post, which caused problems such as restrictions on the design of the mold and die set.

This invention was made with the aim of eliminating such problems, and provides a method for dividing a transfer bar that does not require a large space in the direction of dividing the transfer bar and that allows the division to be performed without forcibly unclamping the transfer bar. This is what I am trying to do.

[Means and operations for solving the problem] In order to achieve the above object, the present invention provides a transfer bar which is divided into a plurality of bars at both ends and a central bar, and each bar is detachably connected by a bar connector. First, place the bar in the unclamp position during normal operation and pull it in one direction using the bar disconnector to separate the two end bars from the center bar, and then lower the hook protruding from the center bar. The transfer bar is clamped by separating the center bar and the other end bars by further pulling the transfer bar with the bar disk connector while engaging the locating pin protruding from the mold die set side. To provide a method for dividing a transfer bar, which allows the division of a transfer bar at different positions without requiring a large space in the dividing direction.

〔Example〕

An embodiment of the present invention will be described in detail with reference to the drawings shown in FIGS. 1 to 4.

In the figure, reference numeral 1 denotes the main body of a transfer press, which has a die set 4 that can be freely moved in and out of the press main body 1, and a slide 3 is provided above the die set 4 so as to be movable up and down.

The die set 4 consists of an upper die set 4a housing an upper die (not shown) and a lower die set 4b housing a lower die.The lower die set 4b is placed on the upper surface of the bolster 2, and the upper die set 4a are respectively attached to the lower surface of the slide 3, and a plurality of guide posts 5 are erected between each die set 4a, 4b to guide the vertical movement of the upper die set 4a.

On the other hand, reference numeral 6 denotes a pair of transfer bars provided between the bolster 2 and the slide 3, which are arranged in parallel in the workpiece transport direction (direction of arrow A), and each transfer bar 6 has a central bar 62 and a cut at both ends thereof. It is divided into a plurality of bars 61 and 63 at both ends which are connected to each other in a separable manner, and only the central bar 62 can be carried out of the press body 1 together with the die set 4. The finger 7 can be replaced by external setup.

Further, a bar connector 8 is provided between the central bar 62 and both end bars 61, 62, and each halo 1'+6
2 + 63 are separated and freely connected,
Two hooks 10 are provided on the outer surface of the central bar 62 to engage with locate pins 9 protruding from the lower die set 4b when the transfer bar 6 is divided.

In the figure, 11 is a feed lever that drives the transfer bar 6 in the feed direction, and 12 is a bar disk connector.

Next, the method of dividing the transfer bar 6 will be explained with reference to FIGS. 3(a) to 3(c). First, the transfer bar 6 is moved in the unclamping direction at the forced advance position shown in FIG. 3(a), Lower it at the unclamp position during normal operation.

At this time, the piston rod 12a of the bar disconnector 12 is in an extended state, and the locking portion 12b provided at the tip of the piston rod 12a is inserted into the groove 6a provided in the bar 63 at one end of the transfer bar 6. 4. Engage as shown in Figure 4.

Next, in this state, release the bar connector 8 connecting the both end bars 61 and the center bar 62, and release the bar connector 1.
2, when the both end bars 63 are towed, the end bars 61 connected to the feed lever 11 and the center bar 62 are first separated as shown in FIG. Hook 10 is engaged with locate pin 9.

After that, when the bar connector 8 connecting the center bar 62 and both end bars 63 is released and the both end bars 63 are pulled by the bar disk connector 12, the center bar 62 is connected to the lower mold die by the hook IO locked to the locate pin 9. Since it is fixed to the set 4b side, the center bar 62 and both end bars 63 are separated as shown in FIG.
The bar holder, in which only the central bar 63 stands up from the lower die set 4b, is placed on the stand 13.

Next, by pulling the die set 4 out of the press body 1 in this state, the fingers 7 provided on the central bar 63 can be replaced by external setup.

On the other hand, after replacing die set 4 and finger 7, die set 4
After transporting into the press body 1, the bird disk connector 1
When the piston rods 12a of the bar disk connector 12 are extended, the bars 63 at both ends and the center bar 62 are first connected by the bar connector 8, and then the piston rods 12a of the bar connector 12 are further extended. The central bar 62 and both end bars 61 are connected by the bar connector 8 by being moved to the both end bars 61 side.

After that, the die set 4 is lowered by a die lifter (not shown), and then the lower die set 4b and the upper die set 4a are clamped to the bolster and the slide 3 in this order, thereby making it possible to start the pressing operation.

In the above embodiment, the die set 4 is directly taken in and taken out from inside the press body 1, but the die set 4 may also be placed on a moving bolster and put in and taken out from inside the press 1 together with the moving bolster. It's good.

〔Effect of the invention〕

As described in detail above, this invention allows the transfer bar to be divided without forcibly unclamping, so the mold device can be designed without considering the interference between the transfer bar and the guide post, which facilitates the design of the mold device. In addition, since the distance between the front and rear guide posts can be made smaller than before, the deformation of the mold device due to the press load can also be reduced, thereby improving the precision of the molded product.

In addition, since the transfer bar can be divided into multiple sections simply by pulling the transfer bar in one direction with the bar disk connector, the transfer bar can be divided into multiple sections without requiring a large space in the dividing direction.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a plan view of the transfer bar, Fig. 2 is a side view of the same, Figs. 3 (a) to 4) are explanatory diagrams of the dividing method, FIG. 5 is a conventional explanatory diagram. 2 is a bolster, 4 is a die set, 4a is an upper die set, 4b is a lower die set, 6 is a transfer bar 61
．． 63 is a bar at both ends, 62 is a central bar, 8 is a bar connector, 9 is a locate pin, 10 is a hook, and 12 is a bar disconnector. Applicant Komatsu Seisakusho Co., Ltd. Agent Patent attorney Yonehara Seibu Valve Udohama Mototada

Claims (1)

[Claims] The transfer bar 6, which is divided into a plurality of end bars 6_1, 6_3 and a center bar 6_2, and each bar 6_1, 6_2, 6_3 is detachably connected by a bar connector 8, is first placed in an unclamp position during normal operation. Then, by pulling it in one direction by the bar disconnector 12, the space between one of the two end bars 6_1 and the center bar 6_2 is divided, and then the hook 10 protruding from the center bar 6_2 is pushed toward the lower die set 4b side. By further pulling the transfer bar 6 by the bar disk connector 12 while engaging the provided locate pin 9, the central bar 6 is moved.
A method for dividing a transfer bar, characterized by separating the bar _2 from the other end bar 6_3.