JPS6322895B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transfer feeding device in a press.

Transfer feeding devices in conventional presses have generally been constructed from a combination of mechanical parts. In other words, the repeated movements of clamping, advancing, unclamping, and returning the material were all accomplished by combining mechanical parts. This disadvantage was due to the use of many complex and precise mechanical parts.
The drawback was that it took a long time to process and assemble.

Also, when a transfer feed device is attached to a press and used for production, it is possible to perform clamping and unclamping according to the shape and dimensions of the product to be pressed, and to obtain advance and return movements according to the pitch of the mold. This has the disadvantage that it takes time and effort to replace and adjust the mechanical parts that provide each movement. In addition, in order to obtain clamp, advance, and unclamp return movements in accordance with the timing of the press, power and motion were guided from the crankshaft that drives the slide through gears, shafts, etc., and were applied to the transfer device. The disadvantage was that it required a large number of parts and took time to assemble. Also, since the fingers for clamping the blank were attached to the transfer feed bar, two feed bars were usually required, so the use of an expensive transfer feed bar had the disadvantage of increasing the cost of the entire device. Ta.

The present invention aims to provide a transfer feed device for a press that eliminates these drawbacks.

To explain the drawings of one embodiment of the present invention,
20 shows the frame of the press, and 21 shows the blank being transported. Bolster 1 is on top of bed 19.
8 is fixed. Although not shown, a mold row is provided on the feed line in the left and right direction at the center in the longitudinal direction of the bolster 18, and brackets 14 are attached to both left and right ends of the mold row on both front and rear sides, and a ball screw 5 guide is attached to the bracket 14. A shaft 7 is attached. The guide shaft 7 is fixed to the left and right brackets 14, 14 so as to face the feeding direction, but a portion thereof is omitted in the figure. A timing pulley 4 is fixed to one end of the ball screw 5, and rotation is transmitted between the timing pulley 2 attached to the shaft of the variable speed motor 1 and the timing belt 3. Spline shaft 6 is attached to bracket 14 via bearing 16. A lever 23 is slidably attached to the spline shaft 6, and the swinging motion of the lever 23 due to the reciprocating rotation of the spline shaft 6 is transmitted to the finger 10 via the frog 17 to provide clamping and unclamping motion. A block 24 that guides the finger 10 in the horizontal direction perpendicular to the transfer direction in its upper part is screwed into the ball screw 5 and connected to the spline shaft 6 and the guide shaft 7.
These are fitted in a slidable and rotatable manner. Since the variable speed motor 1 is electrically given one fixed amount of rotation alternately in forward and reverse rotation, the ball screw 5 also repeats one fixed amount of forward and backward rotation alternately, giving the same motion to the block 24, so that the finger 1
0 will perform advance and return movements. Identical devices are constructed with symmetry around the center of the bolster. The clamping and unclamping movements of the finger 10 are controlled by a variable speed motor 22 that can freely rotate in forward and reverse directions, and a ball screw 13 connected to this output shaft.
This is done by connecting the and spline shaft 6 with a gear train,
This does not need to be done by the variable speed motor 22, and may be done using a cam or a link, for example.

It goes without saying that the variable speed motor 1 and the variable speed motor 22 can be controlled to rotate in forward and reverse directions in conjunction with the crank (rotating shaft) of the press. Furthermore, since each bracket 14 is loosened and rotatable around the pin 15, when a mold is attached to the bolster 18, it can be moved below the plane of the bolster 18 to easily take the mold in and out. 8,
Reference numeral 9 indicates a ball nut, which facilitates rotation of the ball screws 13 and 5.

According to the present invention, advantages over the conventional method: Advance and return motions are electrically determined by a variable speed motor, so the present invention is significantly superior to conventional devices that obtain advance and return motion from the crank of the press through a large number of mechanical parts. This makes it easier to manufacture parts and reduces assembly time.

Advance and return amounts can be obtained arbitrarily by simply changing the amount of rotation of the motor without the need to manufacture or replace new mechanical parts, greatly improving performance. Similarly, there is no need to create or replace new mechanical parts for clamping and unclamping, so each stroke can be easily given.

Previously, the clamp, advance, unclamp, and return movements could only be changed within a mechanically limited range, but with this invention, any amount of movement can be obtained, making it ideal for the shape of the product to be pressed and the press mold. It is superior to the conventional method in that it can provide the following motion.

[Brief explanation of the drawing]

FIG. 1 is a perspective view for explaining one embodiment of the present invention, 1 is a variable speed motor, 2 is a timing pulley, 3
is the timing belt, 4 is the timing pulley,
5 is a ball screw, 6 is a spline shaft, 7 is a guide shaft, 8 is a ball nut, 9 is a ball nut, 10
is a finger, 11 is a universal joint,
12 is a lever, 13 is a ball screw, 14 is a bracket, 15 is a pin, 16 is a bearing, 17 is a lever, 18 is a bolster, 19 is a bed, 20 is a frame, 21 is a blank, 22 is a variable speed motor, 23
is a lever, and 24 is a block.

Claims (1)

[Claims] 1. In a press transfer device, there are brackets 14 erected at both left and right ends of the mold row front and back sides of the bolster, and a ball screw 5 and a spline rotatably supported between the left and right brackets 14 with the transfer direction directed. A guide shaft 7 is fixed between the shaft 6 and the left and right brackets 14 so as to face the feeding direction, and a guide shaft 7 is provided correspondingly to the front and rear sides of each mold, is screwed into the ball screw 5, and is connected to the spline shaft 6 and the guide shaft. A finger 10 is provided on each block 24 and guided in a horizontal direction perpendicular to the feeding direction, and a finger 10 is provided on each block 24 and is slidable on the spline shaft 6. a lever 23 that is freely engaged and whose tip is connected to the rear end of the finger 10 via the frog 17;
A transfer feed device for a press, comprising variable speed motors 1 and 22 which are connected to a ball screw 5 and a spline shaft 6, respectively, and can be controlled to rotate in forward and reverse directions in conjunction with the rotation shaft of the press.