Double-transverse-magnetic-field magnetic control micro-beam plasma arc welding seam tracking method used for ultrathin walled pipe welding

Abstract

The invention provides a double-transverse-magnetic-field magnetic control micro-beam plasma arc welding seam tracking method used for ultrathin walled pipe welding. Welding seam tracking of ultrathinwalled pipe welding can be achieved. A system adopted by the method mainly comprises a double-transverse-magnetic-field magnetic control micro-beam plasma arc welding seam tracking sensor, a data analysis module, a tracking control module and a welding torch position adjusting module. According to the method, scanning and sampling are carried out in the welding process by adopting a self-designedsingle-scanning five-direction swing collection method, a scanning area can be approximately regarded as a semicircle with the diameter slightly larger than the diameter of a welding seam, in the sampling process, the semicircular scanning area moves along with a welding torch, when welding is carried out through the welding torch, the welding seam is continuously scanned, information is collected by a Hall voltage sensor and transmitted to the data analysis module, then according to tracking principle that positions of points on the pipe surface scanned by the semicircular scanning area correspond to arc voltages one to one, after the data analysis module processes and converts the collected voltage signals, the position of the welding torch and welding seam deviation information at themoment can be obtained, then the tracking control module controls the welding torch adjusting module to adjust the position of a welding gun and a welding path, and therefore real-time tracking of thewelding seam is achieved. According to the double-transverse-magnetic-field magnetic control micro-beam plasma arc welding seam tracking method used for ultrathin walled pipe welding, the magnetic field technology is applied to scanning and sampling, welding seam forming is improved while the tracking precision is improved, and therefore the high-quality welding seam can be obtained, and the purpose of improving the performance of an ultrathin walled pipe is achieved.

Description

technical field [0001] The invention relates to a double transverse magnetic field magnetic control micro-beam plasma arc welding seam tracking method for ultra-thin-wall pipe welding. Background technique [0002] Ultra-thin-walled tubes refer to tubes with a diameter-to-wall thickness ratio of more than 100, which are widely used in many industrial sectors and can be used to manufacture metal hoses, bellows, torque tubes, heat exchanger tubes for heat exchangers, and instruments The resonant cylinder of the instrument is sometimes used to transport various corrosive media under high temperature and high pressure, complex vibration and alternating load. Ultra-wave wall pipes are divided into seamless pipes and seamed pipes. The former is processed by cold rolling, cold drawing and spinning, while the latter is made by rolling the strip into a round pipe and then welding. become. Because of the difference in production process, the performance of seamless pipe is better th...

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Problems solved by technology

[0007] To sum up, domestic and foreign scholars' research on the application of magnetic field technology to arc welding mainly focuses on the structure and properties of weld seam, the flow of molten pool metal and the influence of magnetic field on arc state, etc., and the application of magnetic field technology to improve the welding seam tracking method There are fewer studies, and there are no reports on the application of magnetic field technology to improve the seam tracking of ultra-thin-walled pipes to improve the performance of ultra-thin-walled pipes

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