MANUFACTURE OF LONG SMALL DIAMETER STEEL FRAME

PURPOSE:To prevent bending to be generated in a frame easily by cutting a steel plate to a specified length, making it into cylindrical form and after joining facing parts in axial direction by welding, heating the symmetric part of welded part at a specified temperature. CONSTITUTION:A steel plate...

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Bibliographische Detailangaben
Hauptverfasser:	INAO HIROSHI, MITSUZAWA TETSUHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS SOLDERING OR UNSOLDERING TRANSPORTING WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	PURPOSE:To prevent bending to be generated in a frame easily by cutting a steel plate to a specified length, making it into cylindrical form and after joining facing parts in axial direction by welding, heating the symmetric part of welded part at a specified temperature. CONSTITUTION:A steel plate of specified thickness is cut to a specified length and length and formed at cylindrical form to obtain a frame 1. Facing part 2 in axial direction of the steel plate formed to a cylinder is welded extending an entire length to form a weld zone 3. Then, symmetric part 4 of the weld zone 3 is heated at a specified temperature to correct bending caused by contraction strain deriving from the welding. By this way, bending of the frame 1 can be prevented by simple work and long with a small diameter steel frame 1 can be manufactured at low cost.