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Method for predicting friction coefficient of keyless joint surface

A friction coefficient and prediction method technology, which is applied in the fields of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of lack of prediction methods and the inability to accurately specify the friction coefficient of the joint surface of keyless joints, so as to solve the problems that cannot be accurately solved. Given and predicted effects

Active Publication Date: 2019-12-24
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problem that the friction coefficient of the joint surface of the keyless joint cannot be accurately given and lacks a prediction method, and to provide a method for predicting the friction coefficient of the joint surface of the keyless joint

Method used

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  • Method for predicting friction coefficient of keyless joint surface
  • Method for predicting friction coefficient of keyless joint surface
  • Method for predicting friction coefficient of keyless joint surface

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] Such as figure 1 As shown, a method for predicting the friction coefficient of the joint surface of a keyless joint in this embodiment, the keyless joint adopts an expansion joint sleeve composed of an inner ring 4, an outer ring 3 and a bolt 5, and the expansion joint sleeve is set On the shaft sleeve 2 and the main shaft 1, the method for predicting the coefficient of friction of the joint surface produced by the shaft sleeve 2 and the main shaft 1 comprises the following steps:

[0029] 1) Calculate the pressure p on the contact surface between the main shaft 1 and the sleeve 2 according to elastic mechanics 1 :

[0030] p 1 =N 1 ·Δ 1 +N 2 ·Δ 2 +N 3 ·δ 3 (1)

[0031] In the formula, Δ 1 is the assembly clearance between the main shaft and the sleeve, Δ 2 is the assembly gap between the sleeve and the inner ring, δ 3 is the interf...

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Abstract

The invention relates to a method for predicting the friction coefficient of a keyless joint surface. The method mainly solves the technical problems that the friction coefficient of the keyless connection joint surface cannot be accurately given and a prediction method is lacked. The method comprises the following steps: 1) calculating the pressure p1 of the contact surface of a spindle and a shaft sleeve according to elastic mechanics; 2) substituting the pressure p1 of the contact surface of the main shaft and the shaft sleeve into a torque formula to obtain a friction coefficient of the contact surface of the main shaft and the shaft sleeve; (3) the expansion sleeve enables the outer ring to axially move through screwing of a bolt, the moving distance is called as an assembly stroke e,and a relational expression of the assembly stroke and the magnitude of interference is obtained; 4) performing torque capacity experiments under different assembly strokes to obtain a relation tableof the assembly strokes, the magnitude of interference and the torque, and combining formulas (1)-(3) to obtain a friction coefficient value; and 5) obtaining a nonlinear fitting function based on adifferential evolution method, and respectively determining relational expressions of the magnitude of interference, the assembly stroke and the friction coefficient so as to establish a prediction model of the magnitude of interference and the assembly stroke for the friction coefficient.

Description

technical field [0001] The invention relates to a method for predicting the friction coefficient of a joint surface of a keyless joint, which belongs to the technical field of mechanical transmission connection. Background technique [0002] The keyless connection is widely used in metallurgy, new energy, mining machinery, robots, high-end machine tools and other fields because of its simple structure, good neutrality, and strong bearing capacity. This structure realizes load transmission through the friction of the joint surface. At present, There are problems such as the friction coefficient cannot be given accurately and the prediction method is lacking. Contents of the invention [0003] The purpose of the present invention is to solve the technical problem that the friction coefficient of the joint surface of the keyless joint cannot be accurately given and the prediction method is lacking, and to provide a method for predicting the friction coefficient of the joint s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 王建梅宁可侯定邦
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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