四坐标微机控制立体切割机的研究与实现  

On 4-Coordinate Flame Cutting Machine with Micro-Computer Control

作　　者：张勤珍[1] 

机构地区：[1]西北工业大学

出　　处：《西北工业大学学报》1994年第1期107-111,共5页Journal of Northwestern Polytechnical University

摘　　要：文中阐述了机电一体化立体切割机的总体结构，设计思想和机电特点．着重介绍了四坐标联动系统数学建模中坐标系的选择，转角系统的机械解耦技术，提高切割精度的结构设计，软件模块结构及子程序的设计思想，脉冲细化插补和增量法运算，以及抗干扰措施．经工厂两年多运行表明：切割精度高，工作稳定可靠，抗干扰能力强，生产效率高，操作简便．The author is aware of very large 3-coordinate cutting machine available for import. Its three coordinates are p,a,z.To make use of p,a,z and add another coordinate e for turning angle control. The author finds that turning angle error cannot be avoided. So the author uses x, y,Z,θ as the 4 coordinates in her design of 4-coordinate cutting machine.The 4th coordinate θ is needed because torch must always be perpendicular to the surface at whichever point it is cutting.Moreover torch nozzle must satisfy the stringent requirement complicated by the fact that the cylindrical wall surface to be cut deviates appreciably from perfect roundness, that its distance from surf are is maintained at 1mm, the distance optimal for plasma cutting. The above-menhonal two requirements call for two effective measures to be taken. One measure is the design of an effective 4-coordinate trace device.The other measure is the introduction of decoupling technique so as to avoid causing y,z change from intended values when θis adjusted.μ computer control system incorporates certain available technical measures that are considered edvanced in China and also some new ideas of the authors.They all contribute to the performance of the machine in the three following respects:accumulative errors are avoided.the distribution of interpolation pulse is highly uniform, leading to increased cutting accuracy and the entire machine is more resistant to interference.After a careful world-wide search of flame cutting machine literature including patents,covering the 29yr period of 1963-1991 inclusive, by an agency appointed by the Chinese national patent ofice. the author received on July 15,1992 the Chinese Patent No.91124128.4.

关 键 词：四坐标联动 微机控制 立体切割机 

分 类 号：TG48[金属学及工艺—焊接]