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Method for realizing interpolation control in numerically controlled machine system

A CNC machine tool and interpolation technology, which is applied in the field of CNC machine tool motion control and CNC machine tool system, can solve problems such as production and work inconvenience

Active Publication Date: 2008-05-14
SHANGHAI WEIHONG ELECTRONICS TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is still no better method in these aspects, which brings certain inconvenience to people's production and work.

Method used

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  • Method for realizing interpolation control in numerically controlled machine system
  • Method for realizing interpolation control in numerically controlled machine system
  • Method for realizing interpolation control in numerically controlled machine system

Examples

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Embodiment Construction

[0057] In order to understand the technical content of the present invention more clearly, the following examples are given in detail.

[0058] First of all, several nouns related to the technical field of numerically controlled machine tools in the present invention are explained as follows:

[0059] NURBS curve - non-uniform rational B-spline (Non-Uniform Rational B-Spline) curve.

[0060] Toolpath——In manufacturing, people use G / M code or other file formats that can be used to describe a machining trajectory to describe a machining trajectory, which is called a toolpath.

[0061] Interpolation—the refinement process of the tool path. What people describe in CNC machining is only the starting point and end point of the tool path, and does not describe how the machine tool moves from the starting point to the end point. This movement process needs to be completed by the machine tool control system (referred to as the CNC system). The general idea is to refine the tool path ...

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Abstract

The invention relates to a method of realizing interpolation control to the tool path in an NC machine tool system, which includes that: the processed shape is described with Nurbs curves; the Nurbs curve are discretized to form location point range under the condition of meeting the demand of predetermined precision; each point of the location point range is subjected to velocity planning to obtain corresponding speed under the condition of meeting the demand of predetermined acceleration and precision; the interpolation sequences are formed according to the location point range and the corresponding speed of each point; the tool path control signals are produced according to the interpolation sequences and then sent to the power device of the NC machine tool. By adopting the method of realizing interpolation control to the tool path in the NC machine tool system, the invention ensures that the maximum deviation of tool path does not exceed the acceptable scope during processing under the condition of meeting the demand of location precision and acceleration, and the operation speed of each point can be constrained effectively; the invention has quick and efficient process, simple and rapid operation, stable and reliable working performance, and wide application, and lays a solid foundation for the further development of control technology of the NC machine tool.

Description

technical field [0001] The invention relates to the field of numerical control machine tool systems, in particular to the technical field of motion control of numerical control machine tools, and specifically refers to a method for realizing interpolation control of tool paths in a numerical control machine tool system. Background technique [0002] Manufacturing is the basic industry of the national economy, and the level of manufacturing is an important indicator of a country's industrial development. The quality level of CNC machine tools is related to the level of the national manufacturing industry. [0003] At the same time, Non-Uniform Rational B-Spline (Nurbs, Non-Uniform Rational B-Spline) curve is a local, simple method to describe curves in space, which is often used in CAD software and CAM software for curves Surface modeling design. [0004] Although in actual production, the CNC machine tool adopts the method of "line segment forming a plane" to process the s...

Claims

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Application Information

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IPC IPC(8): G05B19/41
Inventor 牟凤林汪永生郑之开汤同奎
Owner SHANGHAI WEIHONG ELECTRONICS TECH
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