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Radius error compensation control method and device for CNC machine tool contour machining

A CNC machine tool and contour processing technology, which is applied in digital control, electrical program control, etc., can solve problems such as insufficient contour processing accuracy of CNC machine tools, and achieve the effect of improving processing accuracy

Inactive Publication Date: 2015-07-29
NANJING INST OF TECH
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  • Claims
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AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: The present invention aims at the defects of insufficient contour processing accuracy of CNC machine tools in the prior art, and provides a CNC machine tool contour processing radius error compensation control method that improves the contour processing accuracy of CNC machine tools

Method used

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  • Radius error compensation control method and device for CNC machine tool contour machining
  • Radius error compensation control method and device for CNC machine tool contour machining
  • Radius error compensation control method and device for CNC machine tool contour machining

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Experimental program
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Embodiment 1

[0042] Such as figure 2 As shown, in this embodiment, the device for improving the contour machining accuracy of the CNC machine tool is the position tracking error compensation controller. The core of position tracking error compensation controller is microprocessor. This embodiment includes the following control steps:

[0043] (1) Insert (series) the position tracking error compensation controller into the data transmission channel between the computer and the numerical control system. figure 2 In the schematic diagram of motion control system components, the CNC system consists of an interpolation controller and servo drives for each axis.

[0044] (2) The microprocessor in the position tracking error compensation controller receives the command file in DXF or PLT format sent by the host computer software on the computer side through the serial port, USB port or network port. The composition of the instruction file includes: the coordinate sequence describing the outl...

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Abstract

The invention discloses a method and a device for contour machining radius error compensation control of a numerical control machine tool. A tracking error compensation control device is arranged at a series connection position on a data sending channel of a computer and numerical control system, and the device receives an instruction document with a DXF or PLT format sent by upper computer software at a computer side, receives a forward channel gain of each axis servo driver of the numerical control system, and calculates radius errors in the machining process of a target contour curve according to the received forward channel gain. The current machining speed of the machine tool and instant position coordinate sequence of each axis servo driver, compensates the target contour curve according to the radius errors, generates the instruction document with the DXF or PLT format, and sends the compensated instruction document with the DXF or PLT format to the numerical control system. The method and the device for contour machining radius error compensation control of the numerical control machine tool can greatly improve contour machining precision of the numerical control machine tool, and particularly improves precision when high speed and small-size contour machining is performed by a servo engraving machine.

Description

technical field [0001] The invention belongs to the technical field of motion control of numerically controlled machine tools, and in particular relates to a radius error compensation control method and device for contour machining of numerically controlled machine tools. Background technique [0002] The CNC machine tool integrates many advantages such as high efficiency, flexibility, precision, compounding, and integration, and has become the main processing equipment of the contemporary equipment manufacturing industry and the mainstream product in the machine tool market. "The Twelfth Five-Year Development Plan of the Machine Tool Industry" proposes that the key technical problems to be solved for CNC machine tools mainly focus on the breakthrough of high-speed and high-precision motion control technology. To improve the motion control performance of CNC machine tools, two core problems need to be solved: interpolation controller and servo drive. Servo drive has fast sp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/19
Inventor 滕福林滕健
Owner NANJING INST OF TECH
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