SU547262A1 - Stamp for drawing cylindrical caps - Google Patents

Description

The invention relates to the processing of metals by pressure, and in particular to the tooling for forming cylindrical caps. Known strains for stretching the capillary caps, consisting of three main parts; matrix, punch and clamp 1. The one-sided gap between the die and the punch in these dies is more than the nominal thickness of the material by the amount of the upper tolerance in thickness and by the amount that takes into account the thickening of the workpiece, i.e. the gap is always greater than the original thickness of the material to be shipped. When the workpiece exits from under the pressure, the edge of the cap is bent outward and, when thrown through the gap between the die and the punch, does not fully straighten. If it is required to manufacture a part with a bent edge, then the shape obtained during stretching prevents the production of a quality part. The aim of the invention is to realize the possibility of calibrating the edge of cylindrical caps during stretching. The goal is achieved by the fact that the punch is made in the form of a sleeve, in the hole of which is installed, with the possibility of axial movement of the rod with the head, having the shape of the product, and placed between the HHNOJ gage element, made, for example, in the form of a cup spring. FIG. 1 shows the proposed stamp a general view; in fig. 2 and 3 depict the calibration sequence of the cap edge. The stamp contains a punch, made in the form of a rod with a head 1 installed in the sleeve 2, and placed between the head and the sleeve of the calibrating element 3, made in the form of a Belleville spring. The sleeve 2 through the holder 4 is fixed in the bottom plate 7. In the same holder, a die cut 6 is fixed, a die cut punch 7, which is simultaneously an exhaust die attached to the top plate 8 via die 9 and a ring 10, Inside the die cut 7 there is an ejector 11 sec. relief work surface. Inside the die matrix 6 posted

when sim 12, which through the pushers 13 and the washer 14 affects the spring 15.

The stamp works as follows.

The sheet is mounted on the cutting punch 6 and when lowering the top plate 8 with the punch 7, the workpiece is cut down and pulled out with the help of the punch head 1, the cap 1

Upon further lowering of the plate 8, the force through the miter holder 9, the ejector 11 and the head of the punch 1 is transferred to the calibrating element 3 supported on the fixedly mounted sleeve 2. As a result, the diameter of the calibrating element increases and the edge of the cap 16 bent at the working edge of the matrix is straightened. .

In this stamp, products with an expanded edge are obtained, which, with further hemming of the edge inward, allows to obtain a curl of small dimensions and improve its

quality, as well as reduce the energy intensity of processing machines.

Form ula invention

A punch for drawing out cylindrical caps containing a punch and a die, in order to allow the edge of the cylindrical caps to be calibrated, the punch is made in the form of a sleeve, in the hole of which the rod having a shape product, and placed between the calibrating element, made, for example, in the form of a Belleville spring.

Sources of information taken into account in the examination:

1. Romanovsky, V.P. Handbook of Cold Shtampovka Mashinostroenie, 1971, p. 228-232, fig. 186 (prototype.

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FIG. 2

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