SU123397A1 - Tool for cold heading fixed nuts - Google Patents

Description

The known tools for cold heading of fixed nuts on nut-upsetting machines, consisting of a matrix of the first draft, landing and withdrawing punches, a cutting punch, and a cutting-out matrix, are not sufficiently productive.

In the described invention, the matrix of the first sediment is made with a one-sided reduction protrusion in the stream and the core core of the upsetting and ejecting punches is assumed to be 5, and the working part of the proscene punch is attached to a flat surface, which is perpendicular to its longitudinal axis.

Such an embodiment of the tool makes it possible to significantly improve the performance of a nut-expansion machine, adapted for the manufacture of fixed nuts.

FIG. 1 shows in two projections a fixed nut, obtained with the help of the described tool on a nut-raising machine; in fig. 2 - in two projections the matrix of the first draft; in fig. 3 - a general view of the tool in the assembly.

In the stream of the matrix 1 (Fig. 2), the first draft is made of a reducing protrusion 2, designed to asymmetrically thin the end of the workpiece.

The tool in the assembly consists of a notched die 3, intended for punching a hole for cutting in the workpiece 4; the slot punch 5 sliding into the drop sleeve 6; a plunger 7 pushed by a spring 8 abutting the gasket 9. The tail part of the plunger 7 enters the creek of the gasket 9. Between the perforated matrix 3 n gasket 9 there is a spacer bushing 10.

During the first transition by means of a matrix / first draft, as well as upsetting and ejecting punches (not shown in the drawing), one-sided reduction of the end of the billet is made and a spherical recess is formed at its end.

The removal of the perforation // in the subsequent transition, which is formed with the help of a slotted matrix and a punch, is performed by a spring-loaded plunger-7 upon returning the slotted punch to its original position.

The working part 12 of the piercing punch is given a flat surface perpendicular to its longitudinal axis.

The core angle of the embankment and ejecting punches is assumed to be 5 °.

Subject invention

A tool for cold heading fixed nuts on nut-landing machines, consisting of matrips of the first draft, upsetting and ejecting punches, cutting punch and cutting matrips, equipped with a spring-loaded plunger, which pushes the cutting through towards the plug-in punch, characterized in that, in order to improve the performance , the matrix of the first settlement of the precipitator with a one-sided reduction lug in the stream and the angle of the core of the landing and ejection punches are assumed to be 5 °, and the working part is cut The punch is given a flat surface, perpendicular to its longitudinal axis.

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