JPS6344193Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a workpiece reversing device for a transfer press, which is used for reversing a workpiece during the processing process of a transfer press.

Conventionally, when reversing a workpiece (semi-finished product) in a transfer press, an idle stage has always been provided to prevent interference between the workpiece and the lower die surface. However, it is wasteful to provide an idle stage in the limited number of processes of the transfer press, and there are disadvantages such as the product not being completed due to that one process and another press having to be used. It was hot.

The purpose of the present invention is to eliminate these drawbacks and use the movement of the feed bar to invert the workpiece while lifting it, thereby preventing interference with the lower mold, and therefore allowing the workpiece to be directly removed from the mold without providing an idle stage. The workpiece can be sent to the mold,
Provides a transfer press workpiece reversing device in which the feed bar can be applied to two-dimensional motions, that is, advance return and clamp/unclamp motions, and three-dimensional motions, that is, motions that include the above-mentioned lift and down motions. It's about doing. Embodiments of the present invention will be described below with reference to the drawings.

The structure of the work reversing device is shown in FIGS. 1, 2, 3, and 4. A pair of feed bars 1 of the transfer press are rotatably supported at opposite positions to rotary shafts 2 oriented in the clamp/unclamp direction, that is, in a direction in which the feed bars 1 are brought closer and farther apart from each other.
A handle 5 of a finger 4 is fixed to the rotating shaft 2 via levers 3, 3 having a required length. finger 4
Since the handle 5 and the handle 5 are fixed integrally, the finger 4 is integrated with the rotating shaft 2 via the handle 5 and the lever 3. The length of the lever 3 is determined depending on the shape of the workpiece 6 and the amount of lifting required when inverting the workpiece. Rotating shaft 2 protruding outside of feed bar 1
At one end, two grooved cams 7, 7 extending in the radial direction of the rotary shaft 2 and having open ends are provided with a constant rotation angle interval, in this case 90 degrees. Although the figure shows a case in which the grooved cam 7 is integrated with the lever 3, it may be provided separately.

On the other hand, feed bar 1 is placed on press bolster 8.
A pedestal 9 that is long in the clamp/unclamp direction is provided at the bottom of the mount 9, and the pedestal 9 is provided with two guide rods 10 facing in the clamp/unclamp direction. A slider 11 is slidably provided on the guide rod 10, and a square column part 14 of a feed bar receiver 13 is fitted into a square hole 12 in the vertical direction of the slider 11 so as to be able to move up and down. A plate 15 that is fixed to the lower surface of the feed bar 1, protrudes in the width direction, and has a required length is engaged with the feed bar receiver 13. It is slidably guided in the feeding direction of a certain work 6. On the side surface of the feed bar receiver 13 corresponding to the grooved cam 7, two pins 16, 16 are provided to correspond to and engage with the pair of grooved cams 7, respectively.
is provided.

The feed bar receiver 13 is positioned at the center of the feed length l of the works 6, 6' placed on the mold 17 on the bolster 8. On the top surface of the feed bar 1, there is a magnetic sheet at a position where the handle 5 of the finger 4 is received, that is, at both sides of the rotary shaft 2, separated by the length of the lever 3, to attract and stabilize the handle 5 when the handle 5 is received. 18, 18 are fixed. A U-shaped spring receiver may be provided in place of the magnetic sheet 18.

Next, we will discuss the effect. In FIGS. 1, 2, and 3, the feed bar 1 performs a clamping motion at the return end, and the workpiece 6 is clamped on the mold 17 by the fingers 4.

The feed bar receiver 13 is guided by the guide rod 10 together with the slider 11 and moves inward following the clamping movement of the feed bar 1. Here, the three-dimensionally movable feed bar 1 performs a lift motion to lift the workpiece 6 from the mold 17, and then the two-dimensionally movable feed bar 1 continues to perform an advance motion. One grooved cam 7 engages with the corresponding pin 16 and rotates around the rotating shaft 2, and when rotated 90 degrees, the other grooved cam 7 engages with the other pin 16. Thereafter, the other grooved cam 7 and pin 16 are rotated 90 degrees while being engaged, and the reversal is completed. At this time, the rotating shaft 2
The finger 4 which is eccentrically fixed to the lever 3
The workpiece 6 is lifted from the mold 17, turned around, and lowered to place it on the next mold 17. The magnetic sheet 18 attracts and fixes the handle 5 of the finger 4 at both reversed ends.
The three-dimensionally moving feed bar 1 further moves down to place the workpiece 6 on the mold 17.

Subsequently, when the feed bar 1 moves to unclamp, the feed bar receiver 13 is guided by the guide rod 10 together with the slider 11 and follows the feed bar 1. When the feed bar 1 performs a lift-down movement, the feed bar receiver 13 is guided by the slider 11 and follows the movement of the feed bar 1. When the feed bar 1 performs a return movement, the grooved cam 7 and the pin 16 engage in the opposite direction to that described above, and the finger 4 is reversed and returned to its original position. In this case, the stroke length m of the advance return motion of the feed bar 1 is the movement range of the rotary shaft 2 in the feeding direction, and the feeding length l of the workpiece 6 is twice as large as the length of the lever 3. That is, when the work reversing device is provided, the interval l between the molds 17 needs to be slightly larger than the other mold intervals m.

FIG. 5 shows a case where the length of the lever 3 between the rotating shaft 2 provided on the feed bar 1 and the handle 5 of the finger 4 is zero. That is, rotation axis 2
This type of shape is used when the handle 5 of the finger 4 is integrated, when the feed bar 1 performs three-dimensional movement, or when the work 6 does not interfere with the mold even if it is not raised from the mold 17. becomes.

As is clear from the above explanation, the present invention can be applied to devices in which the feed bar moves in either two or three dimensions, and since the work is reversed while being raised, interference with the mold can be avoided. Therefore, the workpiece can be sent directly from mold to mold without placing an idle stage in the middle, and since the posture of the workpiece is stable at both inverted ends, there is no failure in delivery, which has practical effects. The benefits are huge.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the main parts of the transfer press equipped with the embodiment, Fig. 2 is a front view of the main parts with a partial cross section,
FIG. 3 is a partially sectional side view, FIG. 4 is a cross-sectional view taken from FIG. 1 is the feed bar, 2 is the rotating shaft, 3 is the lever,
4 is a finger, 5 is a handle, 6 is a workpiece, 7 is a grooved cam, 8 is a bolster, 9 is a stand, 10 is a guide rod, 11 is a slider, 12 is a square hole, 13 is a feed bar holder, 14 is a square column part, 15 is a plate, 16
is a pin, 17 is a mold, 18 is a magnetic sheet,
It is.

Claims (1)

[Scope of Claim for Utility Model Registration] In a transfer press work reversing device, a rotary shaft 2 rotatably provided in opposing positions of a pair of feed bars with the clamping/unclamping direction facing, and a radius of the rotary shaft 2. A handle 5 is fixed in parallel with the rotating shaft 2 through a lever 3 protruding parallel to the direction, and has a finger at its inner end; provided on the side, symmetrical to the extension line of the lever 3,
A grooved cam 7 having radial grooves that are open at a constant angle to each other, and a slider 11 that is guided by a bolster 8 and slides in the clamp/unclamp direction are provided so as to be movable up and down, and the feed bar can be slid in the longitudinal direction. Feed bar receiver 13 guided and restrained in the vertical direction
And, on the outer surface of the feed bar receiver 13, there is an advance
Grooved cams 7 are installed vertically at intervals in the return direction.
A work reversing device for a transfer press, comprising: a pair of pins 16 that engage with respective grooves of the transfer press.