SU1676719A1 - Combined die for bending and trimming parts - Google Patents

Abstract

The invention relates to the processing of metals by pressure, in particular to dies for the bending and cutting of parts such as the terminals of radioelements. The purpose of the invention is to increase the reliability and improve the quality of processing by improving clamping conditions. The stamp contains a bending and cutting matrix mounted on the bottom plate, a hollow holder (D) attached to the top plate, cut and bending punches placed on D, pressure plates and gage plates for the product leads and a shock absorbing unit (AU). In this case, D is made with two through holes in the lower part. The AU is made in the form of two pins, spring-loaded to the top plate and placed in the holes D, two flat springs fixed to D and made with petals according to the number of leads of the product. On the bottom plate there are two stops for engagement with the lower ends of the AU pins. During a running stroke, the leads of the product are clamped by pressure plates. The clamping force is kept constant throughout the entire stroke and is determined by the amount of deflection of the lobes of the flat springs. The quality of the product is improved by increasing the uniformity of the clamp. 1 silt o (L

Description

The invention relates to the processing of metals by pressure, in particular to dies for the bending and cutting of parts such as the terminals of radioelements.

The purpose of the invention is to increase the reliability and improve the quality of processing by improving clamping conditions.

The drawing shows the stamp, General view, longitudinal section.

The stamp contains a block that includes the upper 1 and lower 2 plates, connected by guide nodes 3, on which the working parts are fixed — bending matrix 4, crimping matrix 5, bending punches 6, springs 7 and clip 8. On the top plate there is a hollow holder 9 sec. two vertical through holes in the lower part, symmetrically arranged

relative to the axis of the stamp. In the holder cavity, there is a cushion assembly, made in the form of flat springs 10 with petals 11 mounted on pins x 12, which are placed in the through holes of the holder and spring-loaded to the top plate. The bottom part of the holder 9 is fixed with a cut punch 13 with a fixed central insert. 14, in the vertical grooves of which the pressure plates 15 are located on both sides for the product leads, in the windows between the pressure plates 15 and the trimmed punch 13 are mounted on the shoulder gage plates 16, spring-loaded springs 17. The brackets 18 are fixed on the side surfaces of the holder 9, and a wedge 20 is mounted on the axles 19, preloaded by springs 21. There are stops 22 on the bottom plate with possible 5

one

05

WITH

contact with the bottom surface of the pins 12.

The stamp works as follows.

At the working stroke, the terminals of the radio element are clamped between the working ends of the pressure plates 15 and the upper plane of the bending die 4. The force of the flat spring 10 is transmitted through the pressure plates to each terminal. The pressing force is determined by the size of the petal 11 and the magnitude of its deflection at the point of contact with the pressure plate 15. The flat spring 10 remains stationary, as it is pressed against the corresponding plane of the holder. The fixed stops 22 act on the bottom surface of the flat spring through the pins 12 and its movement together with the upper part of the die stops. Upon further movement of the upper part of the stamp, the wedge 20 moves the bending punches 6, which carry out the bending of the leads. After the end of the bend, the punches 6 move away from the matrix 4 under the action of the springs 7 and the calibrating plates 16 come into operation, which fix the terminals of the radio element at the expense of the springs 17 and then trim the leads of the punch 13. The process of bending and trimming the leads This process, the petals 11 of the flat spring 10 with a constant force act on the pressure plates 15 and through them on the terminals of the radio element.

The stamp improves processing quality by improving clamping conditions for the product leads.

Claims (1)

Invention Formula Combined action stamp for bending and cutting parts such as radio element leads, containing a hollow holder mounted on the top plate, a shock-absorbing unit, a composite clip for the product leads, made in the form of pressure plates according to the number of product leads symmetrically located relative to the axis of the stamp, and the bottom plate, distinguished by the fact that, in order to increase the reliability and improve the quality of processing by improving the pressing conditions, it is equipped with two stops fixed to the bottom plate symmetrically to the axis of the a, the holder is made with two vertical through holes in the lower part, the shock-absorbing unit is made in the form of two pins, spring-loaded to the upper plate and placed in the holder holes, with the possibility of the lower end5 to interact with the stops of the lower plate and fixed to the pins in the holder cavity perpendicular to the axis of the flat spring punch with petals for the product leads, each flat spring petal is arranged to interact with the upper end of the corresponding pressure plate.