Method for dynamic characteristic simulation of numerically controlled machine tool and integration with numerical control system

A technology of CNC machine tools and CNC systems, which is applied in general control systems, control/regulation systems, instruments, etc., and can solve problems such as high price, limited test accuracy and anti-interference ability.

Active Publication Date: 2016-09-14
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 expensi

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  • Method for dynamic characteristic simulation of numerically controlled machine tool and integration with numerical control system
  • Method for dynamic characteristic simulation of numerically controlled machine tool and integration with numerical control system
  • Method for dynamic characteristic simulation of numerically controlled machine tool and integration with numerical control system

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Embodiment Construction

[0023]In order to meet the requirements of real-time calculation of the working state of the machine tool 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 the machine tool, finite element technology is used to realize the finite element mesh division of the machine tool related parts, and the zero The flexible body model of the component, which defines the flexible body model as a superelement 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 machine tool dynamics multi-body rigid-flexible coupling model is established. Therefore, an online overall model of each real-time working state of the CNC machine tool (such as different feed positions, different feed speeds, etc.) is established. ...

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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 vibration characteristics of the machine tool have a more obvious impact on its error, and it is one of the main factors affecting the machining accuracy of the machine tool. 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 machine tool. Self-excited vibration is the main vibration for...

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Application Information

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IPC IPC(8): G05B17/02
CPCG05B17/02
Inventor 华青松周琼琼
Owner BEIJING WENLI TECH CO LTD
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