results for this questionWhat kind of machine does spot weld use?What kind of machine does spot weld use?Standard machines are gear chain driven,with knurlers optional.(Knurlers are for welding coated materials such as galvanized,aluminized,and galvanneal).Seam Welding,alternative method Many of the Spot Weld,Inc.standard machines can be modified to include a Rapid-Fire option.Seam Welders Abstract High-frequencyelectric resistance weldingis one of the most common process for production of longitudinalseamweldedcarbon steel pipes suitable for line pipe,casing and tubing.In this pipe production process,the hot rolled strip goes into the forming mill where it is gradually cold formed into a tubular shape in several stages of forming rolls and its edges are continuously joined by a combination of localized electrical resistance heating and forge pressure.High frequency electric resistance welding generally involves high temperature,forge pressure and subsequent cooling,and as the result of this thermal cycle occurs significant microstructural changes.These microstructural changes provides a wealth of information on weld seam quality and edge preparation of hot rolled strips.MICROSTRUCTURAL CHANGES IN THE FORGE WELD AREA DURING HIGH
Was this helpful?People also askWhat do you mean by high frequency welding?What do you mean by high frequency welding?High frequency welding (HFW) steel pipe is that ERW pipe produced with a welding current frequency equal to or greater than 70 kHZ.Through high-frequency current welding resistance,the heat generated in the contact objects,so the objected surface are heated to the plastic state,then with or without forging to achieve a combination of steels.Differences between ERW Steel Pipe and HFW Steel PipeCompany News ,page1.
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