JPH0553746U - Transfer Feed Finger Actuator - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the work from shifting in the press transfer feed. A hollow prismatic beam 1 has an air cylinder 2 which can move forward and backward in a clamping direction on an outer side surface 11 thereof, and a finger mounting portion 3 which can move forward and backward in a clamping direction on an inner side surface 12 of the beam.
There is. The tip of the piston rod 21 of the air cylinder faces the support plate 31 of the finger mounting portion. The air cylinder has an actuating mechanism that synchronizes with the clamp and open movement of the beam. [Operation] The work is sandwiched by the fingers on both sides and conveyed to the next die, and the air cylinder is actuated just before the beam is opened to the left and right, and the pressing force for nipping the work is made zero. The work falls to the center of the mold without shifting the position.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a finger actuating device for a press having a transfer feed, and more particularly to a technique for improving the positional deviation of a work held by a finger.

[0002]

[Prior Art]

 With a press equipped with a transfer feed, multiple molds are arranged, and each time a work is pressed, the work is sent to the next mold for new processing, and the series of processes is efficiently continued to obtain mass-produced products. It is a suitable device for. A transfer feed is used to feed the work to multiple dies. As shown in Fig. 3, a pair of beams (feed bars), which bridges the upper surface of the lower die in the press and has multiple pairs of fingers, are clamped. The work is transferred from die to die by repeating the movements in the order of C, up U, advance A, down D, open O, and return R. In the clamp motion, a plurality of fingers are attached to the pair of beams to approach each other, and at the clamp completion point, the work is sandwiched and gripped from both sides. Since the shape of the work differs depending on each mold, and the shape of the fingers is changed according to it, each finger presses the work in the clamping direction in order to securely grip all the work at the same time. Must. Conventionally, this pressing action has been configured by applying the biasing force of the spring.

FIG. 4 shows an example of the prior art. A bearing 101 is fixed to an outer surface 11a (left side in the figure) of a horizontal beam 1a having a hollow prismatic cross section, and the inside of the bearing is clamped and opened. The sliding shaft 102 that can slide in the direction is fitted inside, and the spring 103 is fitted between the tip of the shaft and the bearing 101. The finger attachment portion 3a is attached to the inner surface (right side in the figure) 12a of the beam 1a. The support plate 31a on the rear surface of the finger mounting portion is constantly pressed in the clamping direction (rightward in the figure) by the tip of the sliding shaft that receives the biasing force of the spring. A rod 32a that penetrates the beam inner surface 12a and slides in the forward and backward direction of the clamp is fixed to the support plate 31a, and a finger holder 33a is fixed to the tip of the rod. Fingers are fixed to this finger holder, but they are omitted in this figure. When the two beams move in the direction of the clamp, the spring biasing force can securely grasp the work so as not to drop it and move to the next up motion. Several improved technologies have been proposed. For example, Japanese Utility Model Publication No. 56-45695, Japanese Utility Model Publication No. 2-11937, or Japanese Utility Model Publication No. 2-37462 shown in FIG. 5 are techniques for improving the operation of the spring in the transfeed.

[0004]

[Problems to be solved by the device]

FIGS. 6 (a) and 6 (b) show basic actions common when a spring is used in the clamp mechanism. In the figure (a), the pair of beams 1a and 1b on the left and right are closest to each other, and the spring 103 is fixed to the beam 1b and the finger 34a which is compressed until the spring 103 becomes the length F and is attached on the finger holding portion 33a. A state is shown in which a disk-shaped work W is pressed and held between the finger 34b and the finger 34b. At this time, the center line of the work W is the line K ₁ coinciding with the center of the die. In this state, the beams 1a and 1b move to clamp and convey the work onto the next die. Figure (b) shows the beam opening to the left and right on the next die and the fingers releasing the work. In order to release the work, the urging force that has been pressed up to that point must be relaxed, so the beams 1a and 1b must retract until the spring 103 extends to the length G and is relaxed. That is, the work cannot be separated from the finger unless the beams retreat by a distance E from the case where the two beams are closest to each other, and only the distance E is the center line K ₂ of the work when the beams are separated. There is a common problem of falling apart. In order to minimize the deviation of the work center, the elastic length E of the spring must be minimized, but in the first step of the forging press work, the dimensional difference in the cutting length of the billet material and the peculiar to the roll-formed product are required. Since a large dimensional difference is unavoidable, there was a limit to reducing the expansion / contraction length E 1.

FIGS. 5 (a) and 5 (b) show a conventional technique in which the displacement of the work is improved when the biasing force of the spring is applied to the engagement and disengagement of the finger and the work. In the figure, the beam 1c moves back and forth by a clamp stroke, and the finger slide 104 is fixed on the beam. An elongated hole 105 penetrates through the finger slide in the clamping direction, and a bolt 106 that determines the position of the spring 103 is vertically inserted into the elongated hole. That is, the length X of the elongated hole 105 corresponds to the maximum movable gap of the finger-34c. In this technique, in order to further reduce the conventional distance X and reduce the deviation of the disengagement position of the work W, a stopper 107 is attached to the rear end of the finger 34c, and an adjusting screw 109 and a stopper mounted on the holder 108 are provided. It is the content that a space C is provided between. By this, the gap C is adjusted within a range smaller than the conventional maximum movable gap X, and the positional deviation of the work is shortened. However, as is apparent from this technique, it is impossible to eliminate the deviation of the work separation position in the structure using the spring. When the dimensional accuracy of molded products is required to a higher level as in recent years, it has become essential to change the basic idea.

In order to solve the problems described above, the present invention aims at providing a finger actuating device that theoretically has zero displacement when a work is separated.

[0007]

[Means for Solving the Problems]

 The finger feed device of the transfer feed according to the present invention has an air cylinder 2 fixed to an outer side surface 11 of a horizontal beam 1 having a hollow prismatic shape and movable in the clamping direction of the beam 1, and a finger on an inner side surface 12 of the beam 1. The mounting portion 3 is mounted slidably in the forward and backward direction of the clamp, and the tip of the piston rod 21 of the air cylinder 2 opposes the support plate 31 on the rear surface of the finger mounting portion 3 so as to be in pressure contact therewith. The above-mentioned problems were solved by having an operating mechanism that synchronizes with the clamp 1 and the open movement.

[0008]

[Operation] FIGS. 1A and 1B show the operation of the present invention. Similar to FIG. 6 (a), in FIG. 6 (a), the air cylinder 2 is actuated at the moment when the beams 1A and 1B are closest to each other, the piston rod 21 extends in the moving direction of the clamp, and pushes the rod 32 horizontally. The rod 32 horizontally pushes the finger mounting portion 3 to horizontally push the fixed finger holding portion 33A and the fixed finger 34A thereon, and the work W by the other finger 34B. Hold and pinch. The center line of the work at this time is K. In the figure (b), the beams 1A and 1B that have clamped the work onto the next die and carried in the work have just moved backwards to the left and right, and the air cylinder 2 has been activated just before attempting to enter the open motion. The piston rod 21 is contracted to form a gap of the distance J, and the fingers 34A and 34B lose the force for pinching the work, and the work falls down in that position. In other words, since the work is grasped while maintaining the same shortest position between the beams 1A and 1B as in Fig. (A), the center line of the beam drop position does not change from K to the theoretical separation from the finger. The deviation of the work position due to is completely eliminated.

[0009]

【Example】

 2 (a) and 2 (b) are a side view (a) and an AA cross-sectional view (b) showing an embodiment of the present invention. The beam 1 has a hollow prismatic cross section and is mounted horizontally. An air cylinder 2 that operates in the forward and backward direction of the clamp is fixed to the outer surface 11, and a piston rod 21 slides in a cylinder 23 enclosed by a cover 22. For this reason, the packings 24 and 25 are fitted to perform a sealing action, and the ventilation holes 27 and 28 that open and close with an external air source are communicated with the front and rear of the piston rod by the solenoid valve 26. The operation of the solenoid valve 26 is synchronized with the clamping and opening of the beam 1, and a sequence is incorporated so that it opens and closes at the most timely moment. The structure of the finger mounting portion 3 is the same as that of the prior art shown in FIG. 4, and the tip of the piston rod faces the support plate 31 and presses at the required moment, and continues pressing for the required time. The pressing action is transmitted to a finger (not shown) via the rod 32 and the finger holding portion 33.

[0010]

[Effect of the device]

 As described above, when the springs rely on the urging force of the fingers to clamp and grip the work, it is not possible to cope with large dimensional changes of the work, but in the case of the air cylinder of the present invention, large dimensional changes of the work do not occur. Even if there is, it is possible to deal with it, so it is possible to apply it to pressing work of roll-formed products (workpieces), which involves particularly large dimensional changes. Also, when the type of work is the same and the dimensions are different, the work can be continued with the same finger, which can eliminate the troublesome finger replacement work. In addition, since the transfer feed of the forging press conveys high-temperature work and is in a bad environment where the mold release agent is sprayed, the use of air has the effect of preventing fire accidents. .

[Brief description of drawings]

FIG. 1 is a partially longitudinal side view showing the operation of the present invention by (a) and (b).

FIG. 2 is a side view (a) and an AA sectional view (b) of the embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a moving direction and order of a beam of a transfeed.

FIG. 4 is a cross-sectional plan view showing a conventional technique.

FIG. 5 is a vertical sectional front view (a) and a plan view (b) showing another conventional technique.

FIG. 6 is a partial vertical cross-sectional side view showing an operation common to the related art by (a) and (b).

[Explanation of symbols]

 1 Beam 2 Air Cylinder 3 Finger Attachment Part 11 Outer Side Surface 12 Inner Side Surface 21 Piston Rod 31 Support Plate

Claims (1)

[Scope of utility model registration request] 1. In a transfer feed of a press, an air cylinder (2) which can move forward and backward in the clamping direction of the beam (1) is fixed to an outer side surface (11) of a horizontal beam (1) having a hollow prismatic cross section, and a finger mounting portion on an inner side surface (12) of the beam (1). 3 is slidably mounted in the forward / backward direction of the clamp, the tip of the piston rod 21 of the air cylinder 2 opposes the support plate 31 on the rear surface of the finger mounting portion 3 in a pressure contact manner, and the air cylinder 2 clamps the beam 1. A finger actuating device for a transfer feed, comprising an actuating mechanism synchronized with an open movement.