On-line Measurement and Compensation System for Geometric/Thermal Errors of CNC Machine Tools

一种补偿系统、数控系统的技术，应用在控制/调节系统、通用控制系统、测量热量等方向，能够解决无法实现在机测量与补偿、成本高、操作复杂等问题，达到快速高效测试、提高良品率和效率、提高加工精度和精度稳定性的效果

Active Publication Date: 2020-08-25
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] (1) At present, professional precision instruments such as laser interferometers and laser trackers are required for geometric error testing, and the disadvantages are complicated operation and high cost;
[0006] (2) Since the measuring instrument can only perform offline measurement, when the geometric accuracy changes, on-machine measurement and compensation cannot be realized

Method used

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  • On-line Measurement and Compensation System for Geometric/Thermal Errors of CNC Machine Tools
  • On-line Measurement and Compensation System for Geometric/Thermal Errors of CNC Machine Tools
  • On-line Measurement and Compensation System for Geometric/Thermal Errors of CNC Machine Tools

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Embodiment Construction

[0035] In order to make the purpose, technical solution and advantages of the present invention clearer, the implementation of the present invention will be described in detail below in conjunction with the accompanying drawings, taking a certain type of vertical machining center equipped with FANUC 0i MD numerical control system as an example.

[0036] The basic information of the machine tool is: the maximum strokes of the X-axis, Y-axis and Z-axis are 710mm, 500mm and 350mm respectively, and their maximum feed speeds are 32m / min, 32m / min and 30m / min respectively; the maximum spindle speed is 15000r / min.

[0037] The hardware of the present invention such as figure 1 As shown, it includes unidirectional acceleration sensors 14 and 15, digital IC type high-precision temperature sensors 4-13, multi-channel temperature data collector 3 and geometric / thermal error measurement and compensation host 2. The connection and communication methods of each hardware are as follows:

...

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Abstract

The invention provides an on-line measurement and compensation system for the geometric / thermal error of a numerical control machine tool, belonging to the technical field of error testing and compensation of a numerical control machine tool. The online measurement and compensation system for geometric / thermal error of CNC machine tools includes two parts: hardware platform and measurement and compensation software. The hardware platform includes a unidirectional acceleration sensor, a digital IC type high-precision temperature sensor, a multi-channel temperature data collector, and a geometric / thermal error measurement and compensation host. The measurement and compensation software runs in the geometric / thermal error measurement and compensation host to realize the test and compensation of the geometric and thermal errors of the machine tool, as well as communicate with the FANUC CNC system. The invention has the advantages of realizing fast and efficient testing of geometric errors through the acceleration sensor without requiring expensive professional instruments, and can simultaneously perform online real-time compensation for geometric and thermal errors.

Description

technical field [0001] The invention belongs to the technical field of error testing and compensation of numerical control machine tools, and specifically relates to an online measurement and compensation system for geometric / thermal errors of numerical control machine tools. Background technique [0002] The comprehensive errors of CNC machine tools mainly include geometric errors, thermal errors, control errors and force errors. Among them, geometric error and thermal error have the greatest impact on the machine tool. Geometric errors not only affect positional accuracy, but also curve trajectory accuracy. Thermal errors not only affect positional accuracy, but also affect the stability of the accuracy. In order to reduce the influence of geometric errors and thermal errors on the machining accuracy of machine tools, measures such as improving the accuracy of machine tool parts and assembly, fully closed-loop control and timing cooling are generally taken. Although the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23Q23/00B23Q11/00
CPCB23Q11/0007B23Q23/00G05B19/404G05B2219/49207G01K15/00
Inventor 刘阔李特甘涌泉韩伟厉大维刘志松王永青
Owner DALIAN UNIV OF TECH
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