Online coordination control and Petri net verification method combined with water cutting process

Abstract

An online coordination control and Petri net verification method combined with the water cutting process is used for guiding and coordinating a plurality of water jet cutting cross beams and water cutters to avoid collision and finishing cutting tasks stably and parallelly. The method specifically comprises inputting and decomposing computer aided design (CAD) files of a large workpiece to be cut into CAD sub-files of parts to be cut of cross beam systems; further guiding the CAD sub-files into computer aided manufacturing (CAM) software to generate executable numerical control (NC) code files; designing an online coordination control strategy of the multi-cross-beam cutting process; reading cutting information of each cross beam through each NC code file to generate a Petri net model of the multi-cutting process and verifying the correctness of the coordination strategy by the aid of a simulation way of token playing; and respectively installing NC codes and a program of the verified coordination control strategy to a computer digital controller and a coordination control device and executing the multi-cross-beam water cutting process under the online coordination.

Description

technical field [0001] The invention relates to the field of numerical control water jet cutting processing, in particular to a coordinated control and verification method for a multi-beam water jet cutting machine tool for large workpieces. Background technique [0002] Waterjet cutting (abbreviated as water cutting) is a cold point cutting technology, which is obviously superior to other cutting technologies due to the characteristics of no thermal deformation and additional stress deformation, no selectivity of cutting materials, fast cutting speed, and no pollution. Such as hard tool cutting, laser cutting, EDM cutting, plasma cutting, etc. Water cutting technology has been widely used in construction, decoration, machinery, aerospace, communication, automobile, chemical, food and other industries, cutting more than 500 types of materials, such as steel, titanium, alloy, composite materials, marble, leather Wait. [0003] In recent years, the demand for water cutting o...

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Problems solved by technology

However, the correctness of the online coordinated control strategy directly determines the reliability of the machine tool, and an incorrect or incomplete coordinated control strategy is likely to cause collisions between adjacent beams, so it must be verified before the coordinated control strategy is put into practice , only the coordinated control strategy verified as correct can be used

At present, the common verification method is based on the animation simulation of the virtual prototype, but this verification method needs to design a virtual machine tool for simulating the multi-beam system. The design cycle is long and the simulation cost is high. There is an urgent need for a simpler and more effective verification method.

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