Semi-open type wedge-shaped horizontal sliding hydraulic clamp

Abstract

The invention relates to a semi-open type wedge-shaped horizontal sliding hydraulic clamp, comprising a clamp body, an end cover, a piston rod, a piston, a guide key, two clamping blocks, two side guide plates, an upper guide plate and two dustproof strips. The clamp disclosed by the invention is convenient to replace and easy to clean; the clamp body has high rigidity and hardly deforms or slip in a test; the clamp can meet conventional large-batch tensile tests, also can meet the test requirements of dynamostatic universal and repeated tensile and compression tests, and has obvious technical advantages.

Description

technical field [0001] The invention belongs to the field of tensile testing machines, in particular to a semi-open wedge-shaped horizontal pushing hydraulic clamp. Background technique [0002] For the test requirements that require repeated tension and compression, such as dynamic and static universal fatigue tests or repeated tension and compression tests of steel mechanical joints, ordinary wedge-shaped fixtures cannot meet the test requirements, because this kind of fixture can only withstand tensile forces in one direction and cannot withstand Reverse the compression test force, otherwise the specimen will be loosened. For the flat-push fixture, because there must be a gap between the clamping piston and the clamping body, the gap between the clamping piston and the clamping body will affect the accuracy of the test data and accelerate the clamping process during repeated tension and compression tests. fatigue damage. [0003] The wedge-shaped horizontal push fixture...

AI Technical Summary

Problems solved by technology

[0004] 1. For the fixture with fully open clamp body, the rigidity of the clamp body is poor. Under the condition of large load test, the deformation of the wedge-shaped opening of the clamp body is too large, which is the key reason for the slippage of the clamp. The test results accuracy cannot be guaranteed

The stroke of the fixture is short, and the piston rod cannot protrude from the bottom surface of the through groove of the clamp body, resulting in the metal oxide skin, powder and other garbage falling off during the test being stuck in the ring groove between the piston rod and the clamp body, which is difficult to remove

[0005] 2. For the fixture with fully enclosed clamp body, although the rigidity of the clamp body is guaranteed and can withstand large test loads, the processing technology of the clamp body is complicated, the processing is difficult, and the replacement of the internal clamp block is very difficult

The metal scale, powder and other garbage generated during the test are stuck in the ring groove between the piston and the clamp body, which is more difficult to remove under this structural condition, which can easily lead to premature wear and failure of the internal sealing ring of the clamp, resulting in leaking of the clamp. Oil, heavy wear on mechanical parts

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