RU1807907C - Finishing cutting die - Google Patents

Abstract

Usage: metal forming. SUMMARY OF THE INVENTION: In the finishing step, there is a bottom plate 1 with a matrix 9, an intermediate plate 2 with a punch 12, an upper plate 3, a buffer device, a clamp 13. During the slide of the press, the upper plate 3, the intermediate plate 2 are lowered down and clamp 13. Polyurethane springs 15 and 16 are compressed, the plunger 17 rises relative to the top plate 3. Pressure is transmitted to the clamp. At the end of the press stroke, the pusher 17 transfers the force of the slider to the punch 12.1 ill.

Description

The invention relates to the processing of metals by pressure, in particular to dies for the final cutting of parts from plate steel.

The aim of the invention is to expand the technological capabilities of the stamp by increasing the thickness of the processed material and increasing the reliability ..,

The drawing schematically shows the proposed stamp.

The stamp consists of lower 1, intermediate 2 and upper 3 plates connected by stops: columns 4, bushings 5 and 6 and rods 7 and 8. On bottom plate 1, matrix 9 is rigidly mounted with guide rails 10. To intermediate plate 2 a punch 12 is fastened by means of a punch holder 11, along which a clamp 13 is moved, provided with a wedge rib 14 extending along the outer configuration of the punch 12. Polyurethane springs 15 are located between the upper 3 and intermediate 2 plates. A polyurethane spring is installed between the punch holder 11 and clamp 13 16. A pusher 17 is mounted in the upper plate 3, which is capable of axial movement relative to the plate 3 and interacts with the buffer device. The buffer device consists of an upper 18 and lower 19 plate, between which polyurethane springs 20 are installed. The plates of the buffer device are interconnected by stops 21.

The stamp works as follows.

A billet of sheet steel is fed to the die 9 between the guide bars 10. The press is started. During the course of the clamping slide (dotted line in the figure) downward, the upper die plate 3 and the associated intermediate plate 2, punch 12 and clamp 13, which first touches the workpiece, are lowered with it. With further lowering of the upper plate, the polyurethane springs 15 and 16 are compressed, the floating pusher 17

00

about vj

cho about

VI

s

the intermediate plate 2 rises, an increasing force is transmitted to the clamp 13, and the wedge-shaped rib is pressed into the workpiece, forcing the metal to the cutting edge of the punch. At the end of the stroke of the pressure slide, the punch 12 reaches the workpiece and is pressed into it with force.

Claims (1)

Then, during the cutting down of the press sub-slide, the lower plate 19 from the buffer device transfers the force of the slide to the pusher 17, and through the intermediate plate 2 to the punch 12, which cuts the part with an even cut. After the punching slide moves together with the 4 buffer device upwards, the pressure slide starts to rise with the upper plate 3, releasing the spring 15, and the spring 16 removes the metal workpiece from the punch. Finally, by means of bars 7 and 8, the stamp is fully disclosed. The blank strip is moved one step and the duty cycle is repeated. SUMMARY OF THE INVENTION A stamp for finishing cutting, comprising a fixed lower plate with a matrix fixed on it, movable upper plate, an intermediate plate on which a punch is placed, limiters of relative movement of the intermediate and upper plates, a clamp with a wedge rib, mounted for axial movement relative to the intermediate and top plates, means of transferring forces to the intermediate plate and clamp, characterized in that, in order to expand technological capabilities by increasing the thickness of the processed material, it is equipped with a buffer device located above the upper plate, the means of transmitting forces to the intermediate plate and the clamp are made in the form of a pusher located coaxially with the punch in the upper plate with the possibility of axial movement relative to it and interacting with the buffer device and polyurethane springs placed between the upper plate and the intermediate and between the intermediate plate and the clamp.