The Research On Hydraulic Hard Pipe Automation Welding Machine Based On Process-oriented Open CNC

Since the 21 st century, hydraulic industry is developing rapidly, the application range is becoming more and more wide, this trend will inevitably bring about the hydraulic pipe demand increase greatly. As is known to all, hydraulic tube parts has been widely used in various industries, such as engineering, mining, agriculture, aerospace, medical and so on. Hydraulic pipe is generally divided into hard pipe and soft pipe. Hydraulic hard pipe is relative to the hydraulic soft pipe, it is generally made of steel, copper or other metal materials. According to the application requirements, the straight pipe bent into complex shape of tube in the first production, and then goes flange welding. Before painting, welding is the last manufacturing, which is the most important process.Automatic welding technology has been developing for several years, but the technology is not mature enough. The Labor force is cheaper in china now, there is still widely used manual welding in the hydraulic hard tube welding work. This production methods has serious drawbacks, Such as, welding workers worked in poor environment, Welding quality is inconsistent because of the fixture positioning or workers operating proficiency or other problems. This topic in view of the existing problems in the hydraulic pipe automatic welding, designs the suitable for most of the hydraulic hard pipe three-dimensional high flexible modular fixture, use the IPC+PMAC multi axis motion control card type of open CNC system, in-depth analysis of the welding technology of hydraulic hard pipe, develop automation hydraulic hard pipe welding machine.First, this paper summarizes the welding automation and the development of open numerical control system at home and abroad, it introduces characteristics of hydraulic hard pipe and the requirements of welding performance. Analyzes the hydraulic hard pipe welding process and Soldering Precautions, Chose the CO2 gas shielded welding as a welding method.Secondly, determine the welding machine auxiliary device, such as Selection of welding power source, wire feeding mechanism, made mechanical structure design of welding machine. To determine the degree of freedom of the welding torch, Establishing the motion model of the welding torch, designs hydraulic hard pipe flexible clamping fixture, complete the whole welding machine mechanical structure.Thirdly, determine the design of the typical IPC+ PMAC mode, Introduces the PMAC multi axis motion control card features and functions for every detail, Take the PMAC card as the core of the whole system, then make the hardware design and completion the hardware interface design.Finally, complete the software system by the modular design concept, introduces all the functions of the software system. Complete the software configuration of motor and the sports program design.