The Composite Tracking Method Of Narrow Gap Submerged Arc Welding Based On Magnet-controlling And Inductance

In the modern manufacturing production and processing link， thewelding process is an important material connection method, it is widely used inoil pipelines, machinery and equipment, the main frame and deck, wind powertower and other industries. In most of the domestic manufactories welding are alwaysprocessed by manual, semi-automated mode, which exist lots of problems likeworkers work intensity, great dependence on the operation level of workers, it isvery difficult to guarantee the quality of welding component especiallywhen mass-produced appearing, production efficiency is difficult to ascend andalso other difficult issues. Therefore, at this stage focus on the development ofintelligent seam tracking technology is particularly necessary. In the narrow gapsubmerged arc welding process, the welding wire in the groove has a strictrequirement of position, according to the objective requirement of the narrow gapsubmerged arc welding tracking, to develop a new type of electromagnetic compositesensor based on the principle of Magnet-controlling and inductance has importantresearch value and practical significance.This paper make overview and summary from the welding robots, the seamtracking sensors, dynamic seam tracking study of these three aspects, combined withthe characteristics of narrow gap welding seam tracking, found that the key problemof narrow gap submerged arc welding tracking which need to be solved. Proposedcomposite seam tracking method based on magnetic and inductive. Specific contentsare as follows：Make study of the theory on magnetic controlling and inductance technology, thebasic principle and the working process of the seam tracking sensor are introduced,coaxial coil calculation model is established and analyzed, through calculation,analysis the influence of parameters on the output sensor itself. Analyzed themovement law of the arc column from two angles of microcosmic andmacroscopic, established the sensor arc length analysis model， these analysestheoretically provide a basis for composite sensor realize seam tracking.Combined with the basic laws of electromagnetism and the optimization theory,using ANSYS software to establish3d model of the sensor’s magnetic field andANSYS software of finite element analysis was carried out on the sensormodule, analyze and optimize the coil horizontal distance, mutual inductance coil length, the thickness of the coil element,coil end angle and other factors. The sensorparameters are determined according to the optimization results, provide sufficientevidence for realization of seam tracking.In view of the sensor signals are susceptible to interference, and thecharacteristics of the signal is weak, designed the optical coupling circuit and acamplifying rectifier circuit, Determined the height adjustment scheme，built the seamtracking test platform, made the sensor for seam tracking experiments, extract arcdeviation from scanning signals and the vertical position of the sensor coil measureddata and the simulation results are compared, analysis the influence of the outputsignal and the sensor height range, through a lot of experiments and analysis, provethe feasibility of this sensor used in seam tracking.According to the analysis of welding process, establish geometric analysis modelof this motion mechanism, a motion model is established based on two differentcontrol methods of the precision analysis model, determined the relevant factorsand established the simulation effect diagram, analyzed the different adjustment effectand the adjustment error.