Floating mechanism for clamping workpieces in machining

Abstract

The invention discloses a floating pressure mechanism for clamping workpieces in machining. The mechanism comprises a base; a transverse plate is arranged at the upper part of the base; the left and right ends of the transverse plate are fixedly connected with the base through first brackets; spherical through grooves are formed in the left and right sides of the top surface of the transverse plate; first balls are arranged in the spherical through grooves cooperatively, and can be rotated in the corresponding spherical through grooves; first through holes are formed in the tops of the first balls; internal thread pipes are arranged in the first through holes, and can slide back and forth in the corresponding first through holes; and the side surfaces of the internal thread pipes are tightly contacted and matched with the inner walls of the corresponding first through holes. The clamping distance of two clamping points can be automatically adjusted according to the thickness of workpieces; in the process of automatically adjusting the clamping distance, the balance of the clamping force of the two clamping points can be maintained; and the mechanism is skillful in structural design, simple in operation and convenient to use.

Description

technical field [0001] The invention belongs to the technical field of fixtures, in particular to a floating pressure mechanism used for clamping workpieces in machining. Background technique [0002] The positioning and pressing of the fixture is the main body of the fixture, which is relatively simple. In fact, after the workpiece is positioned and clamped, how to ensure the "tightening" of the non-compressed position of the workpiece with poor rigidity has always been a difficult point for the fixture to tackle. The pressing mechanism generally adopts: a set of fixture blanks are fixed at three points, and the three points are correspondingly pressed, and an auxiliary support cylinder is added where the rigidity of the workpiece is relatively poor. (Principle of the auxiliary support cylinder: the auxiliary support head can move up and down. Under the action of force (about 1 kg), it is close to the workpiece. When the hydraulic oil pressure increases, the thin-walled sl...

AI Technical Summary

Problems solved by technology

Assuming that the thin-walled sleeve of the auxiliary support cylinder is tightly held, the auxiliary support head can carry 400 kg of force, and the auxiliary pressing force of the rotary cylinder is 200 kg. There are actually two defects: 1. The support force of the auxiliary support head is reduced

2. The deformation of the workpiece is large, and the flatness error of the processed surface is large

[0003] At present, there are also floating pressure mechanisms that can solve the above problems, such as the technical solution provided in the publication number CN 101323090 B, but this type of floating pressure mechanism has the disadvantage of being inconvenient to change the clamping direction, and there is also a single clamping point. It is easy to cause indentation on the surface of the workpiece, and it is not convenient to use

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