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A Wear Prediction Method for Helical Surface

A technology of spiral surface and prediction method, applied in geometric CAD, design optimization/simulation, special data processing applications, etc., can solve the problem of inaccurate calculation of roller screw, and achieve the effect of short research period and low cost

Active Publication Date: 2022-03-22
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of inaccurate wear calculation of roller screw pair, the present invention provides a calculation method of helical surface wear

Method used

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  • A Wear Prediction Method for Helical Surface
  • A Wear Prediction Method for Helical Surface
  • A Wear Prediction Method for Helical Surface

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Embodiment Construction

[0033] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0034] The invention provides a method for predicting wear of a spiral surface. During the operation of a roller screw, the wear of the spiral surface is predicted based on the Archard wear prediction method, which specifically includes the following steps:

[0035] Step 1. Establish the required coordinate system and the conversion relationship between the coordinate systems;

[0036] In this embodiment, the coordinate system in step 1 includes the global coordinate system, the screw fixed coordinate system, the screw section coordinate system, the roller fixed coordinate system, and the roller section coordinate system, such as figure 1 shown, and adopt the method of coordinate transformation to obtain the conversion relationship between the coordinate systems;

[0037] Step 2, establishing the surface equation of the screw and the roller helical surface;

[...

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Abstract

The invention relates to a wear prediction method of a spiral curved surface. Based on the planetary roller screw pair model, the meshing motion and contact characteristics of the roller screw are analyzed, and then the wear of the spiral curved surface is predicted by using the Archard wear prediction method, which includes The steps are as follows: respectively establish the coordinate system of the lead screw and the roller and carry out coordinate transformation; establish the surface equation of the helical surface of the lead screw and the roller; determine the position of the contact point of the lead screw and the roller; calculate the relative velocity at the contact point; Calculate the contact stress at the contact point; based on the Archard wear prediction formula, predict the wear of the helical surface.

Description

technical field [0001] The invention belongs to the technical field of wear prediction of a spiral curved surface, and more specifically relates to a method for predicting wear of a contact surface based on the movement process of a roller screw. Background technique [0002] The planetary roller screw pair is a mechanism that uses multiple rollers to engage with the helical surface between the screw and the nut to convert rotary motion into linear motion. During the movement of the roller screw pair, wear will inevitably occur. The most common form of wear is the wear of the helical surface of the roller and the screw. By predicting the wear of the helical surface, the damage of the screw can occur. Take measures in advance to ensure that the accuracy of the operation is not affected and avoid unnecessary losses. Contents of the invention [0003] technical problem to be solved [0004] In order to solve the problems of inaccurate calculation of the wear of the roller s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/17G06F30/20G06F111/10
CPCG06F30/17G06F30/20G06F2111/10
Inventor 马尚君李闯闯刘更
Owner NORTHWESTERN POLYTECHNICAL UNIV
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