JPS59218232A - Transfer device - Google Patents

Abstract

PURPOSE:To insert exactly an object to be worked into a lower die, and also to take it smoothly out of the lower die after a press work by moving the object to be worked, by using a feed bar of a specified structure and a push-up rod, when a press work is executed by upper and lower dies while, moving successively the object to be worked. CONSTITUTION:In case when a material to be worked P in a transfer press device is put in a lower die 7, and a press work is executed by an upper die, a press work is executed to half-finished goods in the first working station, subsequently, movement of the base material to be worked and the half-finished goods in case of pressing them to the final product in the working station is held by a feed bar 1 consisting of a movable finger 2 and a fixed finger 3, they are loaded exactly on the lower die 7, and after the press forming, the movable finger 2 for holding the half-finished goods or the product is pushed up by a rise of a pushed up by a rise of a push-up rod 24 by rotation of a crank shaft 26, and it it moved to the following process. A position shift of the base material and the half-finished goods into the lower die, and folling of them from the lower die do not occur, and they are moved at a high speed and exactly.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transfer device for conveying a workpiece in, for example, a transfer press.

The transfer press is equipped with a plurality of idle stations and a plurality of processing stations, and one press lower mold is disposed in each processing station. Then, after supplying the workpiece to the first processing station and forming pressed semi-finished products at this processing station, the pressed semi-finished products are sequentially transferred to the front processing station or idle station, and each processing station Press processing is applied every time. The supply of workpieces and the conveyance of pressed semi-finished products are carried out by a pair of left and right feed bars. This feed bar is equipped with fingers corresponding to the idle station and processing station, and has reciprocating motion in the front and back direction (advanced,
return) and approach e14 interval movements (clamp, unclamp). In general, a two-dimensional motion feed bar is
It is configured to transport the clamp and adver in sequence. In this case, the feed level is above the lower mold, so when placing the workpiece in the lower mold, the feed bar carries the workpiece above the lower mold and allows it to fall naturally. After pressing, for example, the pressed semi-finished product is pushed up from within the lower mold to a feed level with a knockout pin and conveyed by a feed bar. However, when the workpiece is dropped into the lower mold, there is a risk that the workpiece may bounce and not be reliably fitted into the lower mold, or may be misaligned.

Although it has been considered to provide a guide on the lower mold to prevent misalignment when the mold falls, it is still difficult to solve the above problem when pressing is performed at high speed. Additionally, when pressing semi-finished products from the lower mold using a knockout pin, the semi-finished products may fly off and become unstable, making it difficult to smoothly transfer them to the feed bar. The problem is that it can't be done.

Therefore, there is a transfer device that conveys a workpiece by causing a feed bar to perform a three-dimensional movement that includes clamping, unclamping, advance, and return as well as vertical movement (lift and down). On the other hand, since the feed bar is long and heavy, when it is moved up and down, inertial force exerts a large force, making the feed bar warp and easily generate vibrations. As a result, the feed
The position of the fingers on the bar may become unstable, causing the clamping position to change or not being able to be clamped. This tendency becomes severe when the transport speed increases, and this is a fundamental problem that hinders the development of high-speed transfer devices.

This invention has been made in view of the above circumstances, and an object thereof is to provide a transfer device that can perform reliable fitting into the lower mold and smooth and reliable transfer from the lower mold to the feed e-bar at high speed. purpose.

In this specification, the term "finger" also includes a clamper. In addition, in this specification, front and back refers to the feeding direction of the pressed semi-finished product, and the side where the pressed semi-finished product advances (the right side in Figure 1) is called the front, the opposite side is called the rear, and left and right are the same. Let's say it's facing forward.

This invention will be described in detail below with reference to embodiments shown in the drawings.

In FIGS. 1-3, the transfer press has a first station that requires three-dimensional movement of the feed bar or finger, and a second station that allows two-dimensional movement. The transfer rumor press is equipped with a pair of left and right feed bars (1) that reciprocate in the forward direction and move toward and away from each other.
A large number of fingers are attached to the feed fist bar (1) at predetermined intervals in the front and back direction.

A movable finger (2) that swings vertically around its outer end is attached to a position corresponding to the first station, and a fixed finger (3) is attached to a position corresponding to the second station. ing. Movable fingers (2
) A drive mechanism for swinging the movable finger (2) upward is arranged. Further, the transfer press is equipped with a press bed (4), and a bolster (5) is placed on the press bed (4).
5) The die set (6) is placed on top of the die set (6).
) on which a plurality of lower molds (7) are arranged.

A fixed finger (3) is fixed to the upper surface of the feed bar (1). The first station above is two in a row,
Two movable fingers (2) are also arranged side by side. An outwardly projecting bracket (8) is attached to the outer end of the movable finger (2). Also, movable fingers (2)
Feed bars (1
) is fixed to a shaft support member (9) whose outer end protrudes outward. There is a gill between the outer ends of both shaft support members (9).
l (10+ is stopped. The shaft (Iω passes through the bracket (8) rotatably, and the bracket (8)
) is adapted to rotate around an axis (10).

Further, a hole (1]) slightly elongated in the left-right direction is bored in the portion of the movable finger (2) above the feed bar (1). A spring mounting rod (12) is inserted into the hole (11) from above.
) is passed through and its lower end is fixed to the feed bar (1). The length of the hole (+1) in the left and right direction is slightly longer than the diameter of the spring mounting rod (12+), and the length of the hole (+1) in the horizontal direction is slightly longer than the diameter of the spring mounting rod (12+),
Even when the spring-mounted rod (12) rotates upward about the shaft (1o), the spring mounting rod (12) does not hit the interlocking part of the hole (11). In addition, a spring holder (12a) is provided at the upper end of the spring mounting rod (121), and the movable finger (2) is always held downward between the spring holder (12a) and the two surfaces of the movable finger (2). A second pressing spring 03) is arranged. A contact plate (to be described later) with which the upper end of the rod (24) comes into contact is placed straddling the lower surfaces of the tips of adjacent movable fingers (2), and both movable fingers (2) are connected by contact 1a41. has been done. The length of the contact plate (14) is longer than the conveyance pitch of the feed bar ('') in the front-rear direction. There is a recess (15) on the tip surface of the movable finger (2).
is formed in this recess (151), and an auxiliary clamping claw 06 is slidably left and right in this recess (151).
1 is included. The auxiliary holding claw (16) has a recess (1
51 and the spring fitting recess 07)
The movable finger (2) is always moved by the push spring (08) inserted in
) towards the tip. On the upper side of the recess (15), the movable finger (2) has a long hole (19) in the left-right direction that communicates the recess 05 with the outside, and is fixed to the upper surface of the auxiliary clamping claw 06+. Pin 10)
It protrudes outward through a long hole (19). and,
The auxiliary clamping claw (16) is
) The drive mechanism for raising the tip of the movable finger (2) includes an interlocking rod (21) that passes through the press bed (4) in a vertically movable manner, and a urethane rubber or the like on the upper end surface of the interlocking rod (21). a transmission member (23) which is mounted via a cushioning material (-), passes through the bolster (5) in a vertically movable manner, and has a horizontally long mounting portion (23a) formed at its upper end; A pair of left and right movable finger push-up rods are placed on both left and right ends of the mounting portion (23a) of the transmission member (23), pass through the die set (6) so as to be freely movable downward, and protrude upward. (24). The lower end of the interlocking rod (21) has a bifurcated shape, and a cam follower 251 is attached to the bifurcated portion so as to be rotatable within a vertical plane. The cam follower (support) is brought into contact with a cam fixed to a longitudinally long rotating shaft (26), and the rotation of the rotating shaft (26) is caused by the cam slope and the cam follower.
It is converted into vertical movement of the interlocking rod) through the follower value). The rotating shaft (26) is rotated by the rotational motion of a crankshaft (not shown) of the transfer press being transmitted to the rotating shaft (26) at an appropriate timing via a known motion transmission mechanism. Push-up opening (24)
A roller (28) that rotates in a vertical plane parallel to the front-rear direction is attached to the upper end, and the roller (28) comes into contact with the lower surface of the contact plate, and the feed (/< -tl) is rotated in the front-rear direction. When the roller (28) moves, the roller (28) rotates while contacting the contact plate 041. Then, the rotation axis (
26) Interlocking rod C? 1) is moved up and down, and the interlocking rod (21) moves up and down, which causes the push-up rod (to) to move up and down via the transmission member (23), and the up-and-down movement of the push-up rod causes the push-up rod to move up and down. The movable finger (2) is vertically swung about the shaft (10) via the contact plate a4, and the tip of the movable fin force (2) is vertically moved. After the tip of the movable finger (2) approaches the feed ψ bar (1) and clamps the pressed product, the push-up rod (24+) is moved. When the tip is raised. (The distance S between the tip of the movable finger (2) that moves in the same direction becomes wider, but at this time, the auxiliary clamping claw (16) is pressed forcefully (Ij of (18)).

Protruding due to force, pressed semi-finished product (P) i-! 'm
It is firmly held by the support gripping claw (+6) (see the chain line in Figure 3).

At this point, the operation of each of the above components will be explained with reference to FIG.

In Fig. 4, the crankshaft angle is 180° (when this happens, feed/< -+1+ is the force at the remote position).The press semi-finished product (P) is in the process of moving backward after being conveyed forward in the previous cycle. . At this time, the slide of the transfer press is at the bottom dead center. Also, push up is a rod (24)
is in the lowered position, and the tip of the movable finger (2) is also in the lowered position. From here, the slide of the transfer press begins to rise. On the other hand, the feed bar (1) continues to move backward, and starts approaching movement before reaching the backward position (in Fig. 4, the crankshaft angle 205
°). After the feed e-bar (1) reaches the retreat position, it completes its approach movement, and the pressed semi-finished product is held by the fingers [21 (31) (see the chain line in Figure 1, No. 4).
(corresponds to a crankshaft angle of 285° in the figure). Press semi-finished products (
At the same time that P) is clamped, the push-up rod (24) starts to rise, and the press semi-finished product (P) is lifted from within the lower mold (7) located below the movable finger (2). (See the chain line in Figure 3) The movable finger (2) is located in the lower mold (
7) After lifting the press semi-finished product) from inside, feed bar (1) corresponds to ). In the process of the feed bar (1) moving forward, the roller (28) rotates while contacting the lower surface of the contact plate 04), and the tips of the two movable fingers (2) are held at the raised position. During this time, the slide of the transfer press passes through top dead center and begins to descend. As soon as the feed bar ('') reaches the forward position, the push-up rod (24) starts descending (corresponding to the crankshaft angle of 410° in Fig. 4), and the movable finger (2) also returns to the push-up spring (13). It descends due to the urging force of. Then, when the tip of the movable finger (2) reaches the lowered position, the press semi-finished product (P) is placed in the lower mold (7) (corresponding to the crankshaft angle of 440° in FIG. 4). Thereafter, the feed bar (1) begins to move away, and in the process also begins to move backward (corresponding to a crankshaft angle of 490 DEG in FIG. 4). After the separation and interlocking of the feed e-bar (1) is completed, the slide reaches the bottom dead center (corresponding to the crankshaft angle of 540° in Fig. 4), and press processing is performed on the press semi-finished product field.

As described above, the press semi-finished products 9) are sequentially conveyed to the lower mold in front in synchronization with one cycle operation of the transfer press.

In some cases, a knockout that moves up and down at the timing shown in FIG. - A pin (shown in the figure) may be provided and the semi-pressed product may be removed from the lower mold (7) with this knockout pin. Further, if the lower mold (7) located below the fixed finger (3) is used for drilling holes, there is no need to provide a knockout pin.

Another embodiment of the invention is shown in FIGS. 5 and 6.

In FIGS. 5 and 6, the movable finger (32) is arranged on the feed life bar (1) so as to be able to move up and down while keeping the whole in a horizontal state.

That is, the lower ends of a pair of left and right guide rods (33) that pass through the movable finger (321 in a vertically movable manner) are attached to the feed bar (321).
1), and the movable fingers (3) move up and down along the guide rod (33) while keeping the whole in a horizontal state. A return spring C141 that always biases the movable finger 02 downward is arranged between the finger (321 and the upper surface. Between the left and right guide rods 03), the movable fin 02
) is fixed to the feed bar (1) so as to straddle the feed bar (1). The auxiliary guide haze consists of a pair of opposing vertical walls (35a) that are fixed to both left and right sides of the movable finger (2) and extend upward, and a horizontal wall (35b) that connects the upper ends of the vertical walls (35a). ). In addition, the rollers at the upper end of the push-up rod Gη straddle the lower surfaces of both the inner and outer ends of the adjacent movable fingers 62).
) is arranged, and both movable fingers are connected by the abutment root wall. Contact plate (36
) is longer than the conveyance pitch of the feed bar (1) in the front-rear direction. Below the left and right contact plates (supports),
Two movable fingers or push-up rods (9) are arranged for each movable finger (321).The two push-up rods (9) have the same timing as the push-up rondo in the above embodiment. It is designed to move up and down at the same time. That is, the mounting part (39a) of the transmission member (39) in the drive mechanism of the movable finger rock is longer than in the above embodiment, and both left and right ends are connected to the outer contact plate (A) of the movable finger (32). It extends downward, and four push-up rods are attached to this mounting portion (39a). When the push-up rods (37) rise, the movable fingers (32) maintain a horizontal state. It rises, and its tip also rises.

Since the movable fingers (32) move up and down while maintaining a horizontal state, the distance between the tips of the opposing movable fingers G21 is always constant. Therefore, unlike the movable finger (2) in the above embodiment, it is not necessary to provide an auxiliary clamping claw on the inner surface of the tip.

Others are the same as in the above embodiment, including a feed bar (1
) performs approaching/separating movements and reciprocating movements in the front and back direction at the same timing as in the above embodiment.

In the above embodiment, the finger +2 at the required position
Only the spear end of +321 can move up and down, but this is because it is necessary to reliably insert and remove the pressed semi-finished product into and out of the lower mold (7) in this part. If there is a part where it is necessary to reliably take the pressed semi-finished product into and out of the lower mold, the tip of the finger in that part may be made vertically movable. Furthermore, if necessary, it goes without saying that the tips of all the fingers may be made vertically movable by a mechanism similar to that described above.

Since the transfer device according to the present invention is configured as described above, it is possible to securely fit the transfer device into the lower mold and to smoothly and reliably transfer the transfer device from the lower mold to the feed bar. Moreover, since the feed bar only moves in two dimensions, the above operations can be performed at high speed.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the present invention, and FIG. 1 is a plan view and a time chart showing a part of a transfer device. FIGS. 5 and 6 are plan views of other embodiments of the present invention. (1)...Feed bar, +21+32+ ---
Movable finger, (3)...Fixed finger, 031+3
4)... Return spring, (241 (37)... Rod for pushing up. Figure 1)

Claims (1)

[Claims] In a transfer device that has a pair of feed bars that reciprocate back and forth and move toward and away from each other, and has a plurality of fingers attached at predetermined intervals in the back and forth direction, the finger at a desired position is It is a movable finger whose tip at least can move up and down, and a push-up rod is disposed below the movable finger and is movable up and down and raises the tip of the movable finger in the raised position. A transfer device equipped with a return spring that is always biased downward.