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A Compensation Method for Contour Error in NC Machining

A technology of contour error and compensation method, applied in numerical control related fields, can solve problems such as inability to adapt to processing conditions, and achieve the effects of improving real-time performance and accuracy, realizing dynamic compensation, and being easy to implement.

Active Publication Date: 2020-09-08
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
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Problems solved by technology

However, the current compensation method cannot be related to the machine tool and the workpiece, and cannot adapt to different processing conditions

Method used

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  • A Compensation Method for Contour Error in NC Machining
  • A Compensation Method for Contour Error in NC Machining
  • A Compensation Method for Contour Error in NC Machining

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0031] see figure 1 and figure 2 , the compensation method of contour error in numerical control machining provided by the present invention, described compensation method mainly comprises the following steps:

[0032] Step 1, obtaining the contour error value of the processed workpiece.

[0033] Specifically, the shape of the workpiece in NC machining is complex and diverse, and the cutting...

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Abstract

The invention discloses a contour error compensation method in numerical control processing, and belongs to the field of numerical control related technologies. The compensation method comprises the following steps that (1) a contour error value of a processing workpiece is obtained, the error compensation quantity of each shaft is calculated on the basis of the obtained contour error value, and further a workpiece error compensation table which comprises compensation point positions and corresponding compensation quantities in each feed shaft direction in the machine tool processing process is generated; and (2) a numerical control system calculates a compensated control instruction sequence on the basis of a processing G code before processing workpiece compensation and the workpiece error compensation table, and further the processing workpiece contour error is compensated dynamically in the interpolation process of processing control. The workpiece error compensation table corresponding to the processing workpiece contour is generated in a non-processing state, the contour error is compensated dynamically in the interpolation process of processing control based on the workpiece error compensation table, thus, the processing contour precision is improved, and the adaptability is higher.

Description

technical field [0001] The invention belongs to the technical field related to numerical control, and more specifically relates to a method for compensating contour errors in numerical control machining. Background technique [0002] With the improvement of product quality requirements, new requirements are put forward for the precision of processed workpieces. In the process of machining, there will inevitably be contour errors, which will affect the accuracy of NC machining. As an effective method to improve the machining accuracy of CNC machine tools, error compensation technology has been widely used in the machine tool industry. The conventional methods involved in the error compensation of CNC machine tools include: [0003] (1) After the parts are processed, measure the dimensional accuracy of the processed parts to obtain error data, and use the error data to adjust the CNC machining program; [0004] (2) Use the error compensation function provided by the CNC syst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/404
CPCG05B19/404
Inventor 周会成蒋亚坤聂鹏王俊翔陈吉红
Owner HUAZHONG UNIV OF SCI & TECH
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