SU965619A1 - Apparatus for securing parts - Google Patents

Description

(54) DEVICE FOR FIXING DETAILS

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The invention relates to metalworking and can be used. at - fastening of thin-walled cylindrical details.

A device for securing parts is known, comprising a housing, an elastic hollow split mandrel with bent longitudinal edges on which the pads 1 are placed.

However, with this design, the reliability and quality of fixing parts is low.

The purpose of the invention is to increase the reliability and quality of fixing parts.

The goal is achieved by the fact that the body is made in the form of a semi-cylinder with a longitudinal groove designed to accommodate the bent, edges of the mandrel, while inserted between the walls of the semi-cylinder and the pads with the possibility of axial movement are inserted into the device wedge.

This embodiment improves the reliability and quality of fixing parts.

Figure 1 shows the device, a general view; figure 2 - section aa

figure 1; on fig.Z - section BB. in figure 2.

The device consists of a body 1, an elastic mandrel 2, on the inner surface of which the channels 3 are made, and bent longitudinal edges 4 are mounted on the side. On the faceplate 5 a counterweight 6 is installed .. On the fold-off edges of the elastic mandrel 2, the slips 7 are installed and wedge 8. Channels 3 serve to supply a cooling working medium. Holes 9 are located on the surface of the mandrel 2 and are located in planes passing through the channels. 3 (fig.Z). Along the edges of the holes 9, the ribs are made in the form of bent petals 10.

The device works as follows.

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A wedge 8 is pulled out beforehand, and the resilient mandrel with the channels 3 placed between the body and the counterweight 6 is unclamped. The pads 7 of the elastic mandrel 2 limit the movement of the latter. Insert the thin-walled cylindrical part 11 into the elastic mandrel 2, and then insert the wedge 8, moving them in the axial direction. Preload and create a uniformly distributed load over the entire outer contour of the part 11 and at the same time press it and the elastic mandrel 2 to the body 1, then fix the wedge 8 from axial displacement and fix the pads 7. Then the faceplate 5 with part 11 is fixed rotation and lead processing of the inner surface. At the same time, air is captured by the intake elements in the form of petals 10 and through holes 9 it flows through the annular channels 3 between the workpiece 11 and the elastic mandrel 2 and cools the contact area, the device part. Channels 3 can be spiral.

The proposed device allows to increase the reliability and quality of fastening. The cooling of the component-device contact zone is prevented by sticking the surface of the component to the device.

Technical and economic efficiency in the application of the invention

due to the increased reliability and quality of fixing parts.

Claims (1)

1. Anserov MA Accessories for turning and circular grinding 1953, p. 133 machines. Lenizdat, 134, fig. 129. , // 7f}} Ty /) 7i / y7y / 7, ff ; f4: Xf i vvv . (i / z.2 fi