Simple constant-pressure fixture

Abstract

The invention relates to a simple constant-pressure fixture. The simple constant-pressure fixture comprises a guide sleeve, a hold-down oil cylinder and an upper oil cylinder; the hold-down oil cylinder is arranged in the guide sleeve; a hold-down piston is arranged in the hold-down oil cylinder; the bottom end of the upper oil cylinder is fixedly connected with the top end of the hold-down oil cylinder are fixedly connected, and the upper oil cylinder and the hold-down oil cylinder communicate with each other; a pressure limiting barrier part is arranged at the communicating position of the upper oil cylinder and the hold-down oil cylinder; a pressure limiting spring is arranged in the inner cavity of the upper oil cylinder; and a liquid return pipeline which can be selectively opened isfurther connected between the hold-down oil cylinder and the upper oil cylinder. The fixture disclosed by the invention is simple in structure and convenient to operate, is capable of meeting the requirement of having the same hold-down force on workpieces different in thickness, and avoids the defect that a simple hold-down device in the prior art has an excessive hold-down force on a thick workpiece but an insufficient hold-down force on a thin workpiece.

Description

technical field [0001] The invention belongs to the technical field of clamps, and in particular relates to a simple constant pressure clamp. Background technique [0002] When machining the workpiece material, it is usually necessary to use a fixture to fix the workpiece to prevent the plate-shaped workpiece from shaking during machining and affect the accuracy of machining. However, the design defects of the simple fixtures for fixing the workpiece in the prior art are more obvious. For example, the screw nut is used to tighten and clamp the workpiece, and the operation of the rotating screw is relatively cumbersome, which is not conducive to rapid clamping; It is well adapted to the rapid compression of workpieces of different thicknesses, and it is easy to cause the problem of excessive clamping force for thick workpieces and insufficient clamping force for thin workpieces. Therefore, in the face of large-scale workpiece processing, a simple and reliable fixture that ca...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a simple constant pressure fixture, which aims to solve the problems existing in the prior art that the fixture is complicated to operate, unable to realize rapid clamping and unable to well adapt to the pressing requirements of workpieces with different thicknesses

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