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Reliability test device for CNC (Computer Numerical Control) grinding machine

A feed system, CNC grinding machine technology, applied in the direction of measuring devices, machine/structural components testing, instruments, etc., can solve the problem that the reliability of the CNC grinding machine feed system has few basic data, few reliability loading tests, and can not grasp the numerical control. Grinder feed system reliability level and other issues, to achieve the effect of good application prospects

Active Publication Date: 2015-07-29
BEIJING UNIV OF TECH
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  • Application Information

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Problems solved by technology

[0008] At present, the test of the feeding system of the CNC grinding machine is mainly a no-load test when designing, and the reliability loading test is rarely carried out, resulting in very little basic data on the reliability of the feeding system of the CNC grinding machine, and designers cannot grasp the feeding system of the CNC grinding machine. level of reliability

Method used

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  • Reliability test device for CNC (Computer Numerical Control) grinding machine
  • Reliability test device for CNC (Computer Numerical Control) grinding machine

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] figure 1 It is the schematic diagram of the mechanical structure of the test device. The servo motor a (1) drives the screw (4) to rotate, the screw (4) drives the worktable (10) to move, and the guide rail a (8) and the guide rail b (35) align (10) Play a guiding role. pass image 3 The programmable controller (57) in the control servo driver b (58) to change the rotation speed of the servo motor (1), thereby simulating the different speeds of the CNC grinding machine during processing. The servo motor b (28) realizes the grinding torque loading on the lead screw (4) by driving the hydraulic coupling (23) to run. pass image 3 The programmable controller (57) in the control servo driver a (50) to change the rotation speed of the servo motor (28), thereby simulating the different grinding torques of the CNC grinding machine during processing. pass image 3...

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Abstract

The invention discloses a reliability test device for a CNC (Computer Numerical Control) grinding machine. The integral test device is controlled by a PLC (Programmable Logic Controller); axial grinding force is loaded at one end of a screw of a hydraulic cylinder extension cylinder; the axial grinding force is loaded at one end of the screw due to the fact that a servo motor drives a hydraulic coupler; loading of radial feed force is achieved due to the fact that the hydraulic cylinder extension cylinder acts on a workbench; the positioning accuracy of a feed unit is measured through element devices such as a high-accuracy encoder and an optical grating; friction moment of the screw is indirectly achieved due to the fact that a force transducer measures the bearing force of a force measuring rod which is installed on a nut; the temperature is measured through temperature sensors which are installed on a front bearing seat, a rear bearing seat and a screw nut; the vibration acceleration is measured through an acceleration sensor which is installed on the screw nut. The reliability test device for the CNC grinding machine can simulate working conditions of a feed system of the CNC grinding machine and collect reliability data of the feed system of the CNC grinding system to calculate the reliability level of the feed system of the CNC grinding machine.

Description

technical field [0001] The invention relates to a test device for evaluating the reliability of a feeding system of a numerically controlled grinding machine. The device includes a basic mechanical part and a measurement and control part, and belongs to the technical fields of precision manufacturing technology and industrial automation control. Background technique [0002] CNC grinding machine is the main machine of the equipment manufacturing industry. Its development level and production capacity directly reflect the comprehensive strength of the national industry and play a vital role in the development of the national economy. The performance of the grinding machine determines the level of the equipment manufacturing industry. There is a big gap between the CNC grinding machines in my country and the international advanced CNC grinding machines, which is mainly reflected in the reliability, especially the accuracy maintenance and reliability. The feed system is one of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M99/00
Inventor 范晋伟伊晓龙陈东菊刘超刘勇军刘益嘉
Owner BEIJING UNIV OF TECH
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