SU1547967A1 - Expanding mandrel - Google Patents

Abstract

The invention relates to metalworking and can be used to secure hollow parts. The purpose of the invention is to improve the fixing accuracy by increasing the stiffness of the elastic elements. In the slots 2 of the housing 1 there are resilient clamping elements made in the form of curved plates 3. In the middle part of each plate 3 there is a through groove 4 designed to accommodate the end of the adjacent plate 3. The plates are fixed to the body 1 by a washer 6 and a nut 7. Detail 5 mounted on the mandrel. In the course of operation, when rotating part 5 against the direction of bending of plates 3, frictional forces arise that transmit torque. 3 il.

Description

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The invention relates to the field of metal processing and can be used for

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mount hollow parts.

The purpose of the invention is to improve the fixing accuracy by increasing the stiffness of the elastic elements.

FIG. Figure 1 shows the expansion clamp, 9vka, general view; in fig. 2 is a view A of FIG. 1, FIG. 3 is a section BB of FIG. one

The mandrel includes a housing 1 with radial, evenly spaced circumferential grooves 2, in which resilient clamping elements are placed, made in the form of curved plates 3 with a through groove 4 in the middle part of each plate, designed to accommodate the end of the adjacent plate. thus, an elastic plate system for clamping the workpiece 5, a washer 6 and a nut 7 mounted on the body 1 to fix the elastic plate system on the body 1

The mandrel works as follows. Plates 3 are compressed in the radial direction and set the treated

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Part 5. During operation, part 5 tends to turn against the direction of bending of the plates 3, while on the contact surfaces under the influence of the elastic forces of the plates 3 and part 5 there arise frictional forces that transmit torque from body 1 to part 5. After machining the part 5, by turning the latter in the direction of bending of the plates 3, the processed part 5 is removed from the mandrel in the axial direction. The washer 6 and the nut 7 are designed to secure the plates 3 to the housing 1.

The proposed mandrel has a higher bearing capacity and accuracy of base and securing.

Claims (1)

Invention Formula An expanding mandrel, in the grooves of the housing of which clamping elements are arranged, made in the form of plates with bent ends, characterized in that, in order to improve the fixing accuracy, a groove is made in the middle part of each plate, in which the end of the adjacent plate is placed. Type A 5-5