Comprehensive experiment table for measuring normal and tangential contact rigidity of mechanical junction surface

Abstract

The invention relates to a comprehensive experiment table for measuring normal and tangential contact rigidity of a mechanical junction surface, wherein upper and lower support plates are connected into a whole by a stand column, a jack is fixed in the lower support plate, a pressure sensor and a lower test piece are arranged on the jack, an upper test piece is arranged right above the lower test piece, a lower tangential rigidity test pad is clung to two side faces of the upper test piece and the lower test piece and is connected by bolts and nuts, a bolt pretightening force measuring sensor is lined under a bolt head, an eddy current sensor is fixed on two beams extending forwards and backwards of the lower test piece and just faces to two beams extending forwards and backwards of the upper test piece, an adjusting screw is screwed into a screw guide sleeve by virtue of thread, the upper test piece is embedded into a test piece fixing sleeve, a circular arc surface is formed above the upper test piece, a surface corresponding to the circular arc surface, of the test piece fixing sleeve, is a plane, and by changing the assembly relationship of test pieces, the normal contact rigidity and the tangential contact rigidity of the test piece are realized in the same device, the equipment utilization rate is improved, the cost is saved, and the testing efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of measurement, and in particular relates to a comprehensive test bench for measuring the normal and tangential contact stiffness of a mechanical joint surface. Background technique [0002] There are a large number of joint surfaces in complex mechanical systems such as machine tools, gas turbines, and automobile engines, which destroy the continuity of the mechanical system structure and affect the overall performance of the mechanical system to a large extent. The connection characteristics of the joint surface present a certain degree of nonlinearity, and introducing the characteristic parameter model of the joint surface into the modeling process of the whole system can effectively improve the performance prediction ability of the whole machine in the product design stage. Therefore, the accurate construction of the joint surface characteristic parameter model will provide a theoretical basis for the op...

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Problems solved by technology

Because the measurement of the normal contact stiffness and tangential contact stiffness of the mechanical joint surface cannot be realized o...

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