Device and method for testing normal stiffness of mechanical joint surface

Abstract

The invention discloses a device and method for testing the normal stiffness of a mechanical joint surface. The device is characterized in that a frame type rack in the device is of a rectangular structure; a linear guide rail is arranged on the frame type rack; a first test piece and a second test piece are slidably arranged on the linear guide rail; a left frame and a right frame are provided with threaded holes allowing a first bolt and a second bolt to penetrate correspondingly; the first bolt is connected with the threaded hole of the left frame in a threaded manner, and the end of the first bolt penetrates the left frame to be connected with the left end of a first connecting shaft; the second bolt is connected with the threaded hole of the right frame in a threaded manner, and the end of the second bolt penetrates the right frame to be connected with the right end of a second connecting shaft; a first force sensor connected with the first connecting shaft is arranged at the left end of the first test piece, and a second force sensor connected with the second connecting shaft is arranged at the right end of the second test piece; the output ends of the first force sensor and the second force sensor are connected with a computer through a signal collecting system. The device has the advantages that the device is simple in structure, convenient to mount and demount and easy to perform repeated tests, and the normal stiffness of the mechanical joint surface can be well analyzed.

Description

technical field [0001] The invention belongs to the field of mechanical design and manufacture, in particular to a device and method for testing the normal stiffness of a mechanical joint surface. Background technique [0002] As an inherent structural form in the mechanical system, the mechanical joint surface has a significant impact on the overall dynamic performance of the mechanical system because it exhibits complex dynamic characteristics of both elasticity and damping under the action of an external load. Due to the contact stiffness and contact damping of the mechanical joint surface, there are many factors affecting the dynamic characteristics of the joint surface, and they are very complicated. These factors mainly include: the material of the joint surface, the processing method of the joint surface, the processing quality of the joint surface, and the joint surface. The conditions of the media, the size of the pre-tightening force of the joint surface, the natur...

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Problems solved by technology

[0003] There are so many influencing factors, and their influencing laws are mostly non-linear, and the factors influence each other, so it is impossible to directly determine their influencing laws and degree of influence by means of theoretical analysis. Experimental research methods must be used to solve

[0004] In order to systematically study and ascertain the influence of the normal load on the mechanical joint surface on its normal stiffness, a complete set of testing devices and methods are needed, but there are no relatively mature testing devices and methods in the prior art.

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