Method and device for dynamically detecting comprehensive error of mechanical transmission chain

A mechanical transmission and comprehensive error technology, which is applied in the testing of mechanical components, measuring devices, and testing of machine/structural components, can solve the problems of complex transmission mechanism of precision transmission chains and the inability to comprehensively evaluate the transmission performance of transmission chains, etc., to achieve The effect of easy calibration, economical price and simple operation

Pending Publication Date: 2019-11-01
SOUTH CHINA UNIV OF TECH
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that compared with a single ball screw, the characterization of the error of the heavy-duty and precision transmission chain and its transmission mechanism are more complicated
Since the international standard ISO 3408-3 is not conducive to online monitoring of the transmission error of the transmission chain, and the index parameters proposed by it cannot comprehensively evaluate the transmission performance of the transmission chain, therefore, ISO3408-3 cannot be directly used to guide the detection and monitoring of the transmission chain

Method used

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  • Method and device for dynamically detecting comprehensive error of mechanical transmission chain
  • Method and device for dynamically detecting comprehensive error of mechanical transmission chain
  • Method and device for dynamically detecting comprehensive error of mechanical transmission chain

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Embodiment

[0051] Such as figure 1 Shown is a structural diagram of a dynamic detection device for the comprehensive error of a mechanical transmission chain, including a motor module, a guide rail slide module, a data acquisition and analysis module, and a transmission chain module to be tested;

[0052] The transmission chain module under test includes a screw nut pair and a gear reduction box; the screw nut pair includes a screw rod and a screw nut, which are used to convert the rotary motion of the screw rod into the linear motion of the nut, and drive the mobile work The table moves; one end of the gear reduction box is connected to the servo motor, and the other end is connected to the screw rod, which is used to transmit the rotation motion of the motor to the screw rod;

[0053] The motor module includes a servo motor and a control and drive unit. The servo motor adopts a closed-loop servo control mode, and a circular encoder is arranged on the output shaft; the servo motor drive...

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Abstract

The invention discloses a method for dynamically detecting the comprehensive error of a mechanical transmission chain. The method comprises the steps of: (1), controlling the workshop temperature to the constant temperature, and running a servo shaft system to feed for a period in a reciprocating manner in an effective stroke, so that the mechanical transmission chain reaches a thermal stable state; (2), controlling a servo shaft to feed for one time in a reciprocating manner in an effective stroke, simultaneously, measuring the motor rotation angle theta and the actual position of a workbenchby utilizing a built-in round coder, a linear grating ruler and a data acquisition system, and converting the motor rotation angle theta into the nominal position of the workbench; (3), calculating the reverse gap of a servo shaft transmission chain; (4), calculating the lead error of the transmission chain while positive feeding and the evaluation parameter of the lead error of the transmissionchain while positive feeding; and (5), calculating the evaluation parameter of the reverse lead error. A comprehensive, convenient and precise transmission chain comprehensive error detection method is established in the invention.

Description

technical field [0001] The invention relates to the field of precision detection and monitoring of a mechanical transmission system, in particular to a dynamic detection method and device for a comprehensive error of a mechanical transmission chain. Background technique [0002] Servo motion control systems are widely used in various electromechanical equipment, such as photolithography machines, medical robots, CNC machine tools, all-electric injection molding machines, etc., and are the key basic components for realizing industrial automation, precision and intelligence. In order to obtain the desired motion trajectory and mechanical characteristics, the mechanical transmission chain is an indispensable part of the servo system. The transmission error of the transmission chain will affect the motion control accuracy and stability of the servo system. In the semi-closed-loop servo system, the transmission error has a decisive influence on the positioning accuracy of the sy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/023
CPCG01M13/023
Inventor 史生宇何远圣晋刚曹贤武瞿金平
Owner SOUTH CHINA UNIV OF TECH
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