SU709214A1 - Die set for pressing sheet stock - Google Patents

Description

(54) STAMP FOR SHEET STAMPING

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This invention relates to the field of sheet metal forming.

Stamping sheet metal stamping is known, comprising a movable and fixed plate with a punching tool fixed on them, an ejector supported on a buffer, and a buffer cut-off mechanism made in the form mounted on the axes in a fixed plate, swinging arms lengthened in the direction perpendicular punch axes, and interacting with the buffer and pushers fixed in the movable plate 1.

In the well-known stamp, the buffer unloading mechanism prevents the pressing of parts in waste during cutting and retains the buffer at a strictly defined distance from the working surface of the punching tool, but cannot ensure that the buffer is turned off at the required height range during stretching and shaping.

In order to improve the quality of the finished products when forming-stretching with an elastic medium, in the proposed stamp, the pushers are installed vertically. And equipped with stops fixed to them with the possibility of adjusting

displacement, and swinging levers are made by two shoulders, with one of the shoulders having a serrated surface that interacts with the buffer, and the other shoulder is provided with a roller, which interacts with the thrust rest.

The invention is shown in the drawing.

The stamp contains an elastic punch 1, pressed into the container 2.

0 On the bottom plate 3, the base 4 is fixed, into which the interchangeable matrix 5 and the bottom pressing-out are inserted. pusher 6.

The buffer device consists of

5 of the elastic element 7, clamped by the nut 8 between the upper ring 9 and the lower ring 10, and secured to the bottom plate by means of a pin 11.

The mechanism for switching off the buffer device consists of two swinging levers 12, fixed on the bottom plate 3 by means of axles 13 and pressed to the ring 9 by springs 14.

On levers 12 there are rollers 15,

5 interacting in the process of working with the stops 16 fixed on the pushers 17. In addition, the levers 12, at the ends interacting with the upper nose 9, are made toothed

0 by the surface.

Claims (3)

Claim The blank 20 is placed in the screen sample of the matrix 5. When the press slider moves down, the elastic punch 1 approaches the workpiece 20 and presses it against the matrix 5 and the bottom clamp-ejector 6. When pressure is reached in a closed container 2 sufficient for deformation of the workpiece, the drawing process begins. At the end of the deformation, the levers 12 hold the upper ring 9 of the buffer device in the lower position and the elastic punch 1, when the slider moves up, moves away from the elongated part. At the end of the stroke, the pushers 16 press on the rollers 15. The levers 12 disengage from the ring 9, the buffer device is activated and the part is pushed out of the matrix 5. The use of the shut-off mechanism of the buffer device eliminates the action of the elastic punch on elongated parts — when they are pushed out, so there is no warping of parts with great efforts of the buffer device, the pressure range at which high-quality parts are obtained is significantly expanded. It became possible to extract parts on a stamp in the interval Stamp for sheet stamping, containing movable and fixed IQ plate with fixed to them shtampovoch nym tool ejector, based on a buffer and trip mechanism of buffer made in the form, mounted on axes in the fixed plate, the rockers, subspace ^e zhinennyh in a direction perpendicular to the die axis and interacting with the buffer and pushers fixed in a movable plate, characterized by the fact that, with 20 to improve the quality of finished products during molding-drawing with an elastic medium, the pushers are installed vertically and equipped with stops fixed on them with the possibility 25 adjusting bias, and the swinging levers are made of two shoulders while one of the shoulders has a gear surface interacting with the buffer, and the other shoulder is equipped with a roller, 3Q interacting with a push rod stop.