SU648306A1 - Die set of waste-less pressing of transformer lamina from strip - Google Patents

Description

one of the ends of the lever, which interacts with the other end with the cam, is installed One of the stops and catchers, and at one of the ends of the other two shoulders of the lever connected to the electromagnetic drive, another stop is mounted.

The invention is illustrated by the drawing, where in FIG. 1 shows the general scheme of the automaton stamp; in fig. 2 is a diagram of the tubes of transformer plates from poos.

The die-stamp contains a movable plou 1, on which a punch 2 for cutting jumpers is fixed, a punch 3 for cutting plates, spring loaded, a clamp 4. A matrix 5 is fixed on the fixed plate, in which windows 7 are made. 8, 9 and a bevel 6 for removing plates .

A spring-loaded stop 10 is fastened in the matrix 5, which serves to facilitate the removal of the plates.

A strip 14 is fed into the slot 11 formed by the tray 12 attached to the die 5 and the puller 13.

The puller 13 has a movable stop 15, fixing the strip relative to the punch 3, catchers 16 and a movable stop 17. The movable stop 15 and catchers 16 are fixed to the lever 18, which is driven by a cam 20 mounted on the shaft 19. The cam 20 is driven through a gear wheel 21 and the rack 22 from the guide bars 23 and 24.

The slats 23 and 24 are moved in the slots of the puller 13. Spring-loaded inserts 25 are installed in one of the slats.

The movable stop 17 is fixed on the lever 26 connected with the levers 18.

The lever 26 is equipped with a spring, pressing the stop 17 to the mirror matrix. The lift of the stop 17 is carried out by an electromagnet 27 connected to a microswitch 28, the contact of which is closed by a rod 29.

A fixed stop 30 is fixed to the puller 13. The punch 2, cutting down the webs 31 and the punch 3 for cutting the plates 32 and 33, are set apart from each other at a distance equal to the length of the two plates.

The stamp machine works as follows.

The strip 14 is fed into the slot between the puller 13 and the tray 12, is caught by the guiding strips 23 and 24 and is fed so that its front cover touches the stop 15 ....

If, at the time of gripping the skid 14 by the guiding strips 23 and 24, its front edge is located more than 20 mm from the movable stop 17, then the strip is retained by the movable stop and is not fed into the working area of the stamp.

After feeding the strip 14 to the stop 15, during the working stroke of the press, two bridges 33 are cut out, which are removed through

window 9. At the same time, the guide planes, ki 23 and 24, return to their original position. Lane 14 is prevented from moving by punch 2.

During the return stroke of the press, when the punches 2 and 3 are under the matrix mirror at a distance of 3-II mm, a working movement of the guide bars 23 and 24 occurs, which move the hub 14 to

the entrance of catchers 16 in the punched holes, and the stop 15 slides along the strip 14.

During the next working stroke of the press, the next two bridges 33 are cut down, and the guide bars 23 and 24 return to their original position. Lane 14 is held FROM the movement by punch 2.

During the return stroke of the press, a working movement of the guide bars 23 and 24 occurs.

In this case, the rack 22 under the action;

The guide strips 23 and 24 are moved by means of the cam 20. The lever 18 is set in motion. The catchers 16 come out of the punched windows. The strip 14 is fed until the front edge thereof is in contact with the fixed stop 30.

Then, a working press is carried out in which the jumpers are cut and the plates are cut. One cut-out section of the plate is removed through the window 7, and the other plate is removed along the bevel 6 of the matrix 5. With the passage of the end of the extruded-on; under the anvil 15, it lowers and presses the stationary anvil 30, which closes the contacts of the microswitch 28, which sends a signal to the electromagnet 27, measles, which presses the end of the lever 26 to the plate 32.

When the lever 18 moves upward, the lever 26 also moves, the end of which raises the movable stop 17 above the mirror of the matrix 5, allowing the next strip 14 to be fed into the working area of the stamp. The electromagnet remains turned on for 5-6 working strokes of the press, after which it is turned off via a time relay.

If there is no strip in front of the movable stop 17, the electromagnet is turned on again. When the electromagnet 27 is turned off, the end of the lever 26 is constantly pressed with plastic 32 to the puller 13, and the stop 17

slides over the stamped strip and prevents the second strip from entering the working zone of the stamp. When the guide bars 23 and 24 move backward, the strip is kept from moving by the spring-loaded clamp 4.,

When stamping the end of the strip, if the remainder is less than the length of the plate, it is removed through window 8.

Claims (4)

1. A blank stamping punch for transformer plates from a strip containing a punch for punching windows and a punch for cutting plates mounted on a movable plate of a punch and interacting with dies mounted on a fixed plate having a bevel for removing plates, a puller on which is fixed a stop located above the bevel and movable guide rails, characterized in that, in order to eliminate the possibility of cutting the oversized first plate and eliminate the simultaneous feeding of two strips, Two movable stops located in the puller, one of which is installed before the punch for punching windows at a distance corresponding to the distance between the window and the front end of the strip, and the other behind the punch for punching windows at the distance of the feed step from the first one. 2. A stamp according to claim 1, characterized in that, in order to remove unmeasured strip residue and punching waste, as well as fixing the strip to the working position when punching the second pair of windows, the punch is set apart from one another, equal to the length of two plastia, In the fixed plate between the dies, there is a window for removal and the stamp is equipped with catchers located in the puller and placed behind the punch for punching the windows along the strip feed and interacting with bridges.  3. A stamp according to claim I, characterized in that, in order to prevent the strip from shifting during the return movement of the guide rails, the stamp is provided with a spring-loaded stop fixed on the movable die plate and mounted in front of the movable stops along the strip feed. 4. A stamp according to claim I, characterized by the fact that it is provided with a mechanism for moving movable stops and catchers, made in the form of being driven into rotation from the guide bars through a rack and pinion gear of a cam and two spring-loaded, hinged to each other - double-arm levers, on one end of one of the levers, install the stop and catchers, and the other end is spring-loaded to the cam, the other lever is connected with the electromagnetic drive at one end, and another stop is installed at the other end. Sources of information taken into account in the examination 1. Plotkin, EM, Levin, Yu. Sh., “Complex mechanization in enterprises of the radio industry and instrument-making, M.,“ Machining, 1968, p. 34-35, fig. 22 13  17 2 S1