Floating press mechanism for clamp workpiece of machine finishing

Abstract

The invention relates to a floating pressing mechanism used for mechanically processing a clamping work piece, comprising an installation sliding hole which is arranged in a base seat. The installation sliding hole is connected with a supporting column in a sliding way, a clamping liner is arranged between the outer wall of the supporting column and the wall of the installation sliding hole, the clamping liner is connected with an input end of a power, the installation sliding hole at the lower end of the supporting column is provided with an enclosing cover, clearance is kept between the upper end surface of the enclosing cover and the lower end surface of the supporting column, the top of the supporting column is a spherical lower supporting part which bulges upwards, the upper end of the base seat is fixedly provided with an axle seat which is fixedly connected with the supporting column, the axle seat is provided with a rotating and lifting cylinder, the piston rod of which extends upwards, the top part of the piston rod is fixedly provided with a pressure plate, and the end part of the pressure plate is an spherical upper supporting part which bulges downwards and is matched with the lower supporting part. When in work, the floating pressing mechanism cannot lead to deformation of the work piece and can keep smoothness of the surface of the work piece.

Description

technical field [0001] The invention relates to a floating pressure mechanism used for clamping the spatial position of workpieces in mechanical processing. 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 three-point fixed support for the blank of the fixture, and the three points correspond to the pressing, and an auxiliary support cylinder is added at the place where the rigidity of the workpiece is relatively poor. (The principle of the auxiliary support cylinder: the auxiliary support head can move up and down. Under the action of a force (about 1 kg), it is close to the workpiece. When the pressure of the hydraulic oil incr...

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

Therefore, such a structure is more suitable for rough machining, not for fine machining.

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