SU1505755A2 - Device for locking movable assembly of machine tool - Google Patents

Abstract

The invention relates to a machine tool industry and can be used in the mechanisms of fixation of moving parts of machine tools. The purpose of the invention is to improve the accuracy of fixation by eliminating the influence of the difference in the diameters of the base and fixing fingers. At the moment of fixing, first the surfaces 12 catch the next locking pin 3, then after the stop of the collar 16 into the outer end of the hydraulic cylinder 7, the clamp 6 stops and the rod 8 with the stop elements 5 continues to extend. As a result of contacting the wedge surfaces 9 of the stop elements 5 with radial projections 13 of the wedge surfaces 11 of the elastic elements 10 of the retainer 6, the faceplate starts to turn to the desired position, and the gaps between the fingers 3 and 4 and the surfaces 12 of the retainer 6 are selected. With different diameters of the fingers 3 and 4, the elastic elements 10 are arched due to the occurrence of a moment relative to the projections 13. 4 Il.

Description

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The invention relates to a machine tool industry, can be used: In the mechanisms of fixation of movable units of machine tools, and is an improvement of the known device FOR fixing a movable unit of a machine according to author. No. 1395459.

The aim of the invention is to improve the accuracy of fixation by eliminating the effect of the difference in the diameters of the base and locking fingers. Figure 1 shows the device IB fixed position; 1FIG.2 - section aa in figure 1; on 1FIG.Z - the same, at the moment of p asfnx; figure 4 - node I in figure 2.

A device for fixing a movable machine unit, for example, a faceplate 1 mounted on a fixed

| node, for example, frame 2, contains | locking fingers 3 and the base patient | lec 4, identical to fixing, expanded | mesh; respectively on face 1 and base 2, two thrust elements 5 and clamp 6 reciprocating movement of the; hydraulic cylinders 7 and installed with the possibility of impacting with the thrust elements 5. The number of fixing bays: cent 3 equals the number of positions of the

1, while the base finger 4 relative to the fingers 3 is shifted in the radial direction. The finger 4 is displaced in such a way that the fingers 3 are free to pass when turning the faceplate 1. The stop elements are placed 5 times; they are placed at the end of the hollow rod 8 of the hydraulic cylinder 7 and are made with two sliding surfaces 9. The fixer 6 is made two elastic elements 10 with wedge 11 and parallel 12 axes of the hydraulic cylinder 7 surfaces, and wedge surfaces 11 have protrusions 13. Elastic elements 10 are installed in this way

This means that the surfaces 12 at a fixed position form a groove with lead-in chamfers at the end. The latch 6 is fixed on an axially spring-loaded roller 14 having two flanges 15 and 16 and installed inside the hollow rod 8 of the hydraulic cylinder 7. The roller 14 has the possibility of limited movement relative to the rod 8 and contact with the end surface of the last flange 15, and the other flange 16 - with external face on top B

by the capacity of the hydraulic cylinder 7. The shtok 17 and the rod 18 of the cavity of the hydraulic cylinder 7 are connected to the injection and discharge lines. A rough rotation of the faceplate 1 is produced from a drive (not shown). In the fixed position, the flange 16 of the roller 14 is pressed against the outer end of the hydraulic cylinder 7, and between the facing ends of the rod 8 and the flange 15 there is a certain gap a, and the protrusions 13 of the wedge surfaces 11 of the elastic elements 10 of the retainer 6 are in contact with the wedge surfaces 9 of the stop elements 5, and the surfaces 12 of the groove are in contact with the generators of the base 4 and one of the fixing 3 fingers. In the initial (unlocked) position between the fingers 3 and 4 and the surfaces 12 of the groove there is a gap about, and the shoulder 15 serves to rtsu schtoka 8 and the collar 16 is spaced from the outer end of the hydraulic cylinder 7, the extensible SRI B, defined by the relation

B b - a.

- the stroke in the hydraulic 7;

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- the gap between the ends of the rod 8 and the flange 15.

The device for fixing the mobile unit of the machine works as follows.

In the initial position, the rodless cavity 18 of the hydraulic cylinder 7 is connected to the drain line and the thrust elements 5 with the latch 6 are retracted from the fingers 3 to the extreme position away from the center of the faceplate 1. After a rough rotation of the faceplate 1 and one of the fingers 3 is reached, the drive is turned off and a command is issued for fixation, wherein the rod 17 and rod 18 of the cavity of the hydraulic cylinder 7 are connected to the drain and injection lines respectively. The piston of the hydraulic cylinder 7 moves to the center of the faceplate 1 and the rod 8 with the thrust elements 5 and the latch 6 moves with it. Faceplate 1 at the moment of the end of the rotation by inertia overruns the predetermined position in which it should stop after the final fixation. Therefore, in the process of

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the fixer 6 into the fixed position first of the surface 12 of the groove catches the next fixing finger 3 due to the lead-in chamfers and gaps 5, then after the stop of the shoulder 16 into the outer end of the hydraulic barrel 7 the fixer 6 stops and the rod 8 with the stop elements 5 continues to move, then as a result of contact wedge surfaces 9 of stop members 5 with radial protrusions 13 wedge surfaces 11 of elastic elements 10 of retainer 6 faceplate 1 starts to turn from to a predetermined position, with gaps 8 and retainer selected 6 closes on fingers 3 and 4, fixing the faceplate 1 in a predetermined position. With different diameters of the fingers 3 and 4, the elastic elements 10 are arched due to the occurrence of the moment relative to the projections 13.

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When unclamping, the rodless cavity 18 of the hydraulic cylinder 7 is connected to the drain line, and the rod cavity 17 to the discharge line, after which the hydro piston 5057556

The cylinder 7 is moved to its original position, while the latch 6 for some time, until the azor is chosen between the ends of the bolt B and the shoulder 15 of the roller 14, remains 1 fixed. During this time, the elastic elements 10 of the retainer 6 are consumed before the gaps of about. Upon further displacement of the piston 10 of the hydraulic cylinder 7, the rod 8 together with the retainer 6 returns to; the initial position, after which the next rotation of the faceplate 1 begins and the next fixing finger 3 approaches the fixation zone.

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Claims (1)

Invention Formula A device for fixing the movable unit of the machine according to auth. No. 1395459, characterized in that, in order to increase the fixing accuracy, the base pin is installed with an offset in the radial direction relative to the fixing fingers, and the wedge surfaces of the elastic elements of the fixture are made with protrusions designed to interact with the stop elements. It 7/7 / 5/516 Phie.1 / J 5 3 6 YU 12 3 II 1 5 h 3 13 59 sixteen L 15 YU .З fieL