A device and method for testing the normal foundation characteristic parameters of a mechanical joint surface
A basic characteristic and parameter testing technology, applied in the testing of mechanical parts, the testing of machine/structural parts, measuring devices, etc., can solve the problems of poor versatility, inaccuracy, unscientific detection of characteristic parameters of the joint surface, etc., and achieve convenient operation. , the effect of simple structure
Active Publication Date: 2020-06-26
XIAN UNIV OF TECH
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Problems solved by technology
[0004] The purpose of the present invention is to provide a test device for the basic characteristic parameters of the normal direction of the mechanical joint surface, which solves the unscientific, inaccurate, and poor versatility in the detection of the characteristic parameters of the joint surface in the prior art, and the lack of combination in the prediction of the static and dynamic characteristics of the machine tool. Problems with Surface Characteristic Parameters
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[0036] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0037] The present invention focuses on the acquisition method and device scheme of the normal static and dynamic characteristic parameters of the joint surface per unit area. By applying different normal forces to the joint surface with a certain scale area, the corresponding deformation value of the joint surface is obtained, and the joint surface is drawn. The relationship curve between the surface pressure and the normal deformation can be obtained by fitting the function relationship, and then the static stiffness of the joint surface under different surface pressures can be determined by deriving the function relationship, which is the static stiffness of the joint surface Characteristic parameters, here the joint surface pressure is the pressure on the joint surface per unit area.
[0038] When the joint surface is kept under a...
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The invention discloses a device for testing mechanical joint surface normal basic characteristic parameters. An upper positioning hole is opened at a center position of a top plate of a box body. A positioning sleeve is fixed in the upper positioning hole and is upward and fixedly equipped with an excitation rod. The positioning sleeve is connected downwardly to an upper test piece by a force sensor. A target joint surface A is formed between a lower end surface of the upper test piece and an upper end surface of a lower test piece. The lower test piece is placed in the cylindrical groove ofan upper end surface of a bracket, and the lower test piece is positioned by the cylindrical groove of the bracket. A lower end head of the bracket extends into an inner cavity of a sleeve tube, and the sleeve tube is fixed in a lower positioning hole at the center position of a middle plate of the box body. A non-contact micro-displacement sensor and an accelerometer 1 are installed on the uppertest piece. An accelerometer 2 is installed on the lower test piece. The invention also discloses a method for testing the mechanical joint surface normal basic characteristic parameters. The device structure is simple, the method is convenient to implement, and the study of the static and dynamic characteristic mechanisms of the joint surface and the obtainment of the characteristic parameters ofthe joint surface are facilitated.
Description
technical field [0001] The invention belongs to the technical field of testing the basic characteristics of machine tool structures, and relates to a testing device for the normal basic characteristic parameters of a mechanical joint surface, and also relates to a testing method for the normal basic characteristic parameters of the mechanical joint surface. Background technique [0002] The joint surface exists between the two connected parts. The characteristics of the joint surface are nonlinear and affected by many factors. Foreign research shows that 55% of the stiffness of the machine tool and 70-90% of the damping come from the joint surface. CNC machine tools, etc. There are a large number of joint surfaces in the mechanical system, and the characteristics of the joint surfaces have a great influence on the performance of the machine tool. Therefore, it is of great significance to study the basic characteristics of the joint surface to improve the performance of the ma...
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IPC IPC(8): G01M7/02G01M13/00
CPCG01M7/02G01M13/00
Inventor 张广鹏王佳丽牛琦张璐黄玉美
Owner XIAN UNIV OF TECH