Test method applicable to measurement of static friction coefficient of engineering components
A technology of static friction coefficient and test method, applied in the direction of measuring devices, mechanical devices, instruments, etc., can solve the problems of excessive safety factor, industrial production economy, unfavorable safety, no standardized test methods, etc., to achieve reliable results, The effect of the simple test method
Inactive Publication Date: 2016-05-25
SUZHOU NUCLEAR POWER RES INST +2
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[0006] At present, ASTM and other international general industry standards only standardize the test methods for some very simple combinations of friction pair types, contact forms, and environmental conditions. There is no standard test method for the combination of conditions
Therefore, at present, no matter in the design stage or the operation evaluation stage, the value of the static friction coefficient between the friction pairs is usually only referred to the similar situation in the mechanical manual, and the reference value in the mechanical manual is often related to the type of friction pair and contact form of the actual engineering components. , environmental conditions and other conditions do not match, so that the design or evaluation safety factor will be too large or too small, which is not good for the economy and safety of industrial production
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[0030] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0031] see Figure 3 to Figure 5 As shown, in this embodiment, the measurement method and principle of the static friction coefficient in this application are illustrated by taking the measurement of the static friction coefficient of the most common flat plate and pipe line contact in engineering applications as an example, wherein the flat plate is the first sample 1, and the pipe is the first sample 1. Second sample 2, the measurement test of the static friction force is carried out on a conventional tensile testing machine.
[0032] see Figure 3 to Figure 5 As shown, the sample and test device need to be installed before the test. First, prepare the first sample 1 and the second sample 2, and after cleaning both, fix the flat plate of the first sample 1 to the tensile shaft 3 of the tensile testing machine 10, ...
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The invention discloses a test method applicable to measurement of a static friction coefficient of engineering components. The test method especially aims at measuring the static friction coefficient of a case having smaller contact area between components; the test method is designed from a static friction basic definition, specimens are dragged at a constant force loading speed until the specimens are developed into a state of sliding relative to each other from a state of relative motion tendency, and an Ft-t relation curve can be effectively collected and recorded, so that a maximum static friction force is obtained, and then the static friction coefficient of the components is obtained. The method adopting the static friction coefficient obtained by the method for design and evaluation of component structure stability is conservative, has more security, and has application value in engineering. The test method is simple, has reliable results, and can be widely applied in measurement of the static friction coefficient between the two components under various complex work conditions.
Description
technical field [0001] The invention relates to a test method suitable for measuring the static friction coefficient of engineering components. Background technique [0002] Friction performance is one of the basic properties of materials. The friction performance of a certain material can be characterized by the static and dynamic friction coefficients of the material. Among them, the static friction coefficient is defined as the ratio of static friction to normal force (static friction is the relative maximum resistance at the start of the move). In actual engineering design and evaluation, the coefficient of friction is one of the key parameters for calculating the structural stability of components, especially the coefficient of static friction, which is a key parameter for judging components from stability to instability, and needs to be obtained through experiments. In the prior art, the general test principle for measuring the coefficient of static friction is as fol...
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IPC IPC(8): G01N19/02
Inventor 梅金娜薛飞任红兵秦加明朱勇冯亚飞
Owner SUZHOU NUCLEAR POWER RES INST
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