SU680911A1 - Ejecting device - Google Patents

Description

(54) PUSHING DEVICE

one

The invention relates to the field of forging and cutting machinery engineering, namely, devices for pushing stamped parts out of a die matrix, and can be used to push parts like a rod with a thickening after forming a head.

A device for pushing is known, which contains a ram cylinder, a pusher of a stamped part, a traverse connected via rods to the upper plate of a stamp, spring-loaded sliders mounted on the traverse with wedges to open them 1.

The aim of the invention is the expansion of technological capabilities by ensuring the ejection of blanks, the length of which is greater than the stroke of the slide.

This is achieved by the fact that it is equipped with a rod. M, E is borrowed with spring-loaded sliders, and the power cylinder is fixed on the lower plate of the stamp, while the piston of the cylinder is rigidly connected to the rod on one side, and on the other side In the upper part of the ram, grooves are made for the passage of compressed air, which is connected with a recess located at the lower end of the die.

The drawing shows the proposed device at the time of loading blanks.

The device contains a pneumatic cylinder 1, fixedly mounted on the bottom plate 2 of the stamp. In the pneumatic cylinder I stir, the piston 3, to which the rod 4 is rigidly attached from the bottom, on top - the pusher 5 of the stamped part. In the upper part of the pneumatic cylinder 1, grooves 6 are made, which communicate with recesses 7 at the lower end of the die 8 and have a length greater than the length of the piston 3. With the upper plate 9 of the die, it is rigidly connected by means of 10 of the yoke 11, in which spring-loaded sliders 12 are placed. Spring-loaded sliders 12, when deployed, interact with the wedge lugs 13 mounted, for example, on the body of the pneumatic cylinder 1.

The pneumatic cylinder 1 is supplied with compressed air through an electropneumatic valve 14, whose operation is controlled by a limit switch that interacts with a cam installed, for example, on a press crank, and a time relay (not shown).

On the top plate 9 of the stamp, a slider 15 is mounted, which bears the punch 16 and is able to move to the working position under the action of a wedge 17 mounted on the bottom plate 2 of the stamp, and is returned to its original position by springs.

The device works in the following way.

In the initial position of the press ram and the die, the workpiece 18 is set into the stamp and the working stroke of the press is turned on.

As the press ram moves downward, the wedge 17 moves the slider 15 so that the punches 16 are aligned coaxially with the workpiece 18 and, in continuation of the drying process, the head is stamped and formed on the workpiece. The yoke 11 is lowered by the yoke 10, the wedge lugs 13 come out of engagement with the crawls 12 and the latter under the action of the springs come together butt as soon as they fall below the rod 4.

As the press crawls upward, the punch 16 moves away from the part and then is pushed aside with springs.

The rods 10 lift the yoke 1 1, the sliders 12 with their upper end abut against the end face of the rod 4 and perform a hard pushing of the stamped part until at least the molded head and the part of the extruded part that has been drained under it will come out of the matrix .

Then the cam mounted on the crank of the press switches the electropneumatic valve 14 and the time switch with a limit switch (not shown). The compressed air enters the pneumatic cylinder 1 under the piston 3. The press slider reaches the top dead center and stops, the sliders 12 are separated by the wedge lugs 13, and the piston 3 under the action of compressed air continues its movement up to the stop in the matrix 8 and pushes it out completely

finished part. At the approach of the piston 3 to the matrix, through the grooves 6 and the undercut 7, access to the working cavity of the matrix 8 of compressed air opens, which blows the scale and simultaneously cools it.

The part is removed from the stamp mirror. Thereafter, a time relay (not shown) switches the electropneumatic valve 14, the compressed air supply stops, and the cavity of the pneumatic cylinder 1, located under the piston 3, communicates with the atmosphere, the ejector (piston 3, rods 4 and 5) under

the action of its own weight is lowered

to the starting position for the next cycle of operation, after which the cycle is repeated.

The proposed device compared

The j with a known allows the use of a press with a smaller stroke of the slide for shtampovki, for example, long bolts and rivets.

Claims (2)

1. A device for pushing out predominantly blanks from dies when stamping on presses, comprising a ram, a pusher of a part, a traverse connected through the gangs to the upper plate of the shtampa, mounted on the yoke, spring-loaded sliders with wedge stops for opening them, characterized in that in order to expand technological capabilities by providing pushing out blanks, the length of which is longer than the slide stroke, it is equipped with a rod that interacts with spring-loaded sliders, and the power cylinder is installed On the bottom plate of the die, the cylinder piston is rigidly connected to the rod on one side and the pusher on the other. 2. A device according to claim 1, characterized in that in the upper part of the ram, grooves are made for the passage of compressed air communicating with a recess located at the lower end of the die. Sources of information taken into account in the examination 1. USSR author's certificate No. 107102, cl. At 21 J 13/14, 1956. 3