A Study On A Computer Control System For Double-side Automatic TIG Erect Welding

Nowadays the method of double-side TIG erect welding is adopted in the air-separate equipments largely. But there are some technical difficults for the welding of aluminium alloy such as some broken bits being easily found, a large welding distortion can happen easily, hard to distinguish the difference between the solid metal and liquid metal colour, hard to control the temperature, a lot of air holes can be seen in the welding line and so on. The number of inspected air holes often exceed the limitation of standard if the ready task of cleaning up before welding has not been done completely. Automation of welding will be a necessary trend in order to improve the work condition and enhance the quality of welding.Aimed at the automatic welding of the air-separate equipments. A computer control system for double-side automatic TIG erect welding has been developed in this paper, which can keep the welding parameters of two welding torches consistent, and adopt a high-power and centralized energy fountain, and can take warm-up casually. The control system can assure a higher welding quality and a better work condition and a higher productivity than before.According to some newest fruits of research, two grade decentralized computer control mode has been adopted in the paper. The hardware of the system comprises the five sub-systems, i.e. welding power source, arc length controller, welding wire feeder, welding head traveller and detector. The software is composed of the off-line serving program and the on-line executing program. The operating principle, specifications and control function of the system are introduced. The paper has been solved the problem of high frequency interference to the computer control system, such makes the system work steadily and have a high control precision. The form display in Chinese and can be operated easily.I has done the following works:(1) Have innovated a computer control system of double-side automatic TIG erect welding of aluminium alloy;(2) Analysed the key technics of the control system completely;(3) Designed the computer control system;(4) Solved some possible existing craftwork problems when welding the aliminium alloys;(5) Solved the existing problems of erect welding such as gravity;(6) By the designing of hardware and software, the paper has solved the problem of high frequency interference to the computer control system, such makes the system work steadily;(7) Established the mode of imitating the dynamic process of welding.