1. Technology research and development

At present, the combination of welding head and guide rail has been applied in the automatic welding of field pipe position in many countries around the world. The development of automatic welding equipment mainly focuses on the optimization and realization of welding and process. Only by ensuring the rationalization of welding process parameters can the welding quality be guaranteed. Therefore, in order to ensure the quality of welding, multiple welding processes are usually stored for the same operation content. Some welding operations will have a direct impact on the quality of welding, but the technical staff did not seriously study it, automatic welding equipment is a kind of mechatronics equipment, to be from the machine, electricity, control and welding, and other aspects of multiple angles, multiple aspects of analysis, adjustment. With the continuous expansion of the application range of mobile storage devices, storing a large number of process procedures in them is no longer meaningful and has no strong practicability. The data can be transferred to the automatic welding equipment through the way of storing welding process on the CD, and then the data can be transferred to the automatic welding equipment, and the storage can be completed by the equipment. In the process of using the mobile storage device, the space saved in the storage device can be used effectively. More control programs can be compiled to comprehensively control the welding seam in the process of automatic welding, so as to solve the automatic welding quality in the whole position of the pipeline.

2. Electrical and executive components

DC motor drive technology was applied to the automatic welding equipment, reasonable use of negative feedback are used to control circuit, the essence of control is: the arc voltage and current in the sensing signal equipment test, and the comparison between the reference signal, complete later realized in under the action of operational amplifier amplification, the effective dc motor drive. In the above operation, the operational amplifier circuit or integrated circuit will appear drift phenomenon, that is, after the operating temperature rises, the operational amplifier device or integrated circuit will start to move from the original operating point, resulting in the change of the voltage value of the driving dc motor, resulting in the change of rotation speed. Dc motor is a kind of voltage control type of executive components, the speed of the size of the dc motor control system to reduce the voltage value has a greater impact, if the voltage value changes, will lead to the dc motor speed change, make the position of the welding gun deviation.