SU1602626A1 - Mandrel - Google Patents

Abstract

The invention relates to metal working and may be used for securing parts. The purpose of the invention is to increase the reliability of fastening by ensuring the self-installation of the clamping elements. On the housing 1, the mounting surfaces 2 are in the form of faces, arranged in pairs and symmetrically with respect to the longitudinal axis of the housing, on which clamping elements 3 are mounted in the openings of the guide sleeves 4 fixed to the housing with screws. There are washers 6 with conical end surfaces on the shanks of the body of the mandrel, and nuts 7 with spherical end surfaces are located on the threads. The ends of the clamping elements 3 have spherical surfaces 8. On the mounting surfaces 2, the parts are installed and the nuts 7 are fixed by turning them. 1 hp f-ly, 2 ill.

Description

FIG. one

T

This invention relates to metalworking and can be used to fasten parts.

The aim of the invention is to improve the reliability of fastening by ensuring the self-installation of the clamping elements.

FIG. 1 shows the mandrel, an abundance of view; in fig. 2 is a section A-A in FIG. one.

The frame consists of a housing 1, on the mounting surfaces x 2 of which there are machined Parts and clamping elements 3 mounted in the holes of the guide bushings 4. The guide bushings 4 are fixed to the housing 1 with screws 5. On the tail parts of the housing 1 there are washers 6 with tapered face surfaces and threaded nuts 7 with spherical toric ones are placed on the thread. surfaces. The ends of the clamping elements 3 have spherical surfaces 8. The mounting surfaces 2 are arranged in pairs and symmetrically arranged with respect to the longitudinal axis of the huts, the next pair of huts being displaced axially and located in a plane perpendicular to the first pair.

The mandrel works as follows.

On the case of the mandrel, first on one side, two workpieces are installed and by turning the nuts 7, they are fastened. In this case, one side of the conical surface of the clamp 6, tightly against the spherical surface of the clamping elements 3, moves them to the parts to be machined, and the other side presses against the spherical face surface of the nut 7.

five

0

five

thirty

35

40

45

The same is repeated on the other side. Thus, four machined parts are fixed on the mandrel. The clamping elements 3, the washers 6 and the nuts 7 together constitute a self-aligning system, which makes it possible to compensate for the accuracy of the workpieces by fastening them.

A mandrel with machined parts mounted on it is mounted on a lathe, with one end fastened in the chuck and the other end supported by the center.

When expanding the parts, the nut 7 is rotated in the opposite direction, freeing the machined parts.

Claims (1)

1. Mandrel, on the body of which the following elements are made: installation: clamping elements are located on the surface and are intended to interact with the spherical end of the nut, about 1–; that in order to increase the reliability of fastening, the clamping elements are made in. the segments located in the holes fixed on the body of the sleeves, and the mounting surfaces are arranged pairwise and symmetrically located relative to the longitudinal axis of the body of the coats, the next pair of coaxes shifted in the axial direction and located in the plane perpendicular to the first pair. 1. A mandrel according to claim 1, characterized in that the mandrel is provided with a washer with conical ends, one of the ends of which is designed to interact with the spherical end of the nut, and the other with spherical surfaces formed at the ends of the clamping elements.