SU1526924A1 - Arrangement for clamping parts - Google Patents

Abstract

The invention relates to metalworking and can be used to secure parts. The purpose of the invention is to improve the accuracy of centering by ensuring an even distribution of the clamping forces. On the housing 1 are installed one in another main 3 and additional 4 springs with alternating turns. The inclined bent ends of the springs 3 and 4 abut against the diametrically located inclined supporting surfaces of the recesses 9 and 10 of the housing 1 and the pressure element 2. The latter is made with an end protrusion 13 and inclined slots on its outer surface, designed to interact with counter inclined splined grooves made in the cavity of the housing 1. When moving the rod 14, the pressure element 2 moves, which, rotating, moves the support sites of the recesses 9 and 10 relative to the bent ends of the springs 3 and 4, which choose the gap between spring and 3, and part 16. After the final release of the springs 3 and 4, the part 16 is fixed. 3 il.

Description

Yes

(Daif

3152

The invention relates to metal working and can be used to secure letayo

The aim of the invention is to improve the accuracy of centering by ensuring uniform distribution of the clamping forces.

FIG. 1 shows the device, a general view; in fig. 2 - section AA on fig 1; in fig. 3 is a section BB in FIG. one.

The device comprises a hollow body 1, a pressure element 2, a clamping element made in the form of a helical coil spring 3 and an additional helical spring c, mounted one inside the other on the body 1 with the alternation of their turns. Bent at an angle, the ends 5-8 of the springs 3 and t are placed in diametrically spaced grooves with the supporting pads 9-12 of the housing 1 and the pressure element 2 {FIG. 2 and 3), made at an angle of 30. The pressure element 2 is made with an end protrusion 13, on the surface of which there are inclined splines designed to interact with counter inclined splined grooves made in the cavity of the housing 1, and allowing the pressure element 2 to rotate relative to the housing 1 behind grid splines, made at an angle about the axis in the direction of the longitudinal movement of the element 2 (Fig. 1) relative to the housing 1

----- + 2 arctg n-goGp

Lee, JO c.pr

oi arctg ----- + 2 arctg

where n is the number of turns of one of the

gin;

LS (Da - On.pr); Da is the internal diameter of the fixed part; and pr the outer diameter of the spring

in a free state; L is the working length of the splines; h - the gap between the inner

the surface of the part and the outer diameter of the spring in a free state. With the pressure element 2 is connected a ha I, passing through the opening 15 of the housing 1.

The device works as follows.

Item 1b (FIG. 1) is put on springs 3 and 4 and is based on its torus.

5 0 5

five

0

five

0

five

17 in the thrust collar of the housing 1, the unwinding of the coils of the springs 3 and 4 occurs by moving the pressure element 2 to the left by means of a pneumatic hydraulic cylinder {not shown) connected to the thrust AND, or the center of the back headstock of the machine {not shown). connection, providing longitudinal and angular movement of the pressure element 2 relative to the housing 1, it is rotated clockwise. By sliding the bent ends 5 and 7 {fig. 2) the end coils of the springs 3 and the supporting platforms of the recesses 9 and 11 of the housing 1 and the bent ends 6 and 8 {FIG. 3) coils of springs 3 and i on the support sites of the grooves 10 and 12 of the pressure element 2, the gap between the inner surface of the part 1b and the end coils of the springs 3 and 4 is selected (figure 1). The centering of the part J6 about the axis occurs. After the end RIT cocks are opened, the remaining turns unwind in the direction from the end turns to the middle and the detail 1b is fixed in the device with high centering accuracy, since when the springs unwind, all their turns unwind completely. they retain their correct geometry and, in turn, are fully pressed against the inner surface of the part.

Claims (1)

Invention Formula A device for securing parts, in the hollow case of which a clamping element is installed in the form of a helical cylindrical spring and a pull with a pressure element, characterized in that, in order to improve the accuracy of centering, the device is equipped with an additional spring, and the pressure element is made with an end protrusion and inclined slots on its outer surface, designed to interact with counter inclined splined grooves made in the housing cavity, both springs made with angled ends bent away and are installed one into the other with the alternation of their turns, and on the housing and the pressure element are made with the slots with inclined platforms designed to interact with the bent ends of the springs. A a 6-6 FIG. 2 fff tg.z