A method for dynamic characteristic simulation of CNC machine tool and its integration with CNC system

A technology of numerical control machine tools and numerical control systems, applied in the direction of general control systems, control/regulation systems, instruments, etc., can solve problems such as high price, test accuracy and anti-interference ability constraints

Active Publication Date: 2019-02-22
BEIJING WENLI TECH CO LTD
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Problems solved by technology

[0004] The large number of sensor monitoring equipment installed on CNC machine tools is not only expensive, but also the test accuracy and anti-interference ability are also restricted by the current technology

Method used

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  • A method for dynamic characteristic simulation of CNC machine tool and its integration with CNC system
  • A method for dynamic characteristic simulation of CNC machine tool and its integration with CNC system
  • A method for dynamic characteristic simulation of CNC machine tool and its integration with CNC system

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Embodiment Construction

[0023]In order to meet the requirements of real-time calculation of the working status of CNC machine tools and input the calculation results into the CNC system quickly and effectively, firstly, through the multi-body rigid-flexible coupling real-time modeling system of CNC machine tools, the finite element mesh division of related parts of CNC machine tools is realized by using finite element technology , to obtain the flexible body model of the component, and define the flexible body model as a superunit substructure. And a high-efficiency, low-order calculation model is generated through super-element technology. In the modeling software, each flexible body substructure is coupled and connected, and the matrix equation of the dynamic multi-body rigid-flexible coupling model of the CNC machine tool is established. Therefore, an online overall model of each real-time working state (such as different feed positions, different feed speeds, etc.) of the CNC machine tool is esta...

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Abstract

The invention, which belongs to the field of the numerical control system field of the numerically controlled machine tool, provides a method for dynamic characteristic simulation of a numerically controlled machine tool and integration with a numerical control system. The method comprises: on the basis of a finite element technology, a dynamics multi-body coupling model of a machine tool system at a real-time position is obtained by using a multi-body rigid and flexible coupling modeling system of a numerically controlled machine tool; a dynamics simulation solver is used for obtaining a vibration characteristic of the machine tool at each real-time position by a numerically controlled machine tool feeding unit; interaction of a dynamic characteristic simulation signal of the real-time position of the numerically controlled machine tool and a signal from a numerically controlled software system of the numerically controlled machine tool is realized by using shared internal memory input / output interfaces of the numerically controlled machine tool; and an object-oriented programming technology is applied to a programmable control module, thereby realizing integration of a dynamics simulation solver and a machine tool numerically-controlled software system. The method has the following advantages: the multi-body rigid and flexible coupling modeling system of the numerically controlled machine tool and the real-time solving system are used for replacing an expensive and complicated machine tool dynamic characteristic sensor monitoring system; and thus a precise and comprehensive adaptive control system of the numerically controlled machine tool is realized.

Description

technical field [0001] The invention belongs to the field of numerical control systems of numerical control machine tools, and in particular relates to a method for simulating the dynamic characteristics of numerical control machine tools and integrating with the numerical control system. Background technique [0002] At present, the geometric accuracy of CNC machine tools has reached a very high level. The influence of the vibration characteristics of CNC machine tools on its error is more obvious, and it is one of the main factors affecting the machining accuracy of CNC machine tools. During the working process, the vibration of CNC machine tools is basically divided into two categories: forced vibration and self-excited vibration. Forced vibration is the result of the unbalanced force in the transmission mechanism, the impact force of intermittent cutting and other forms of interference force on the structure of the CNC machine tool. Self-excited vibration is the main v...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B17/02
CPCG05B17/02
Inventor 华青松周琼琼
Owner BEIJING WENLI TECH CO LTD
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