焊接检验规范 英文.docx

management work of quality departmentno. qms-is-005ver.a/0pages.4welding production and acceptance standard of sheet metal partswuxi fucare industrial co., ltdauthor date checker date approver date revision recordveraudit table numberrevised content overviewamenderauditorapprovereffective datesent to: purchasing department production departmentquality department technology department1. standard1.1 according to the national standards of the peoples republic of china: gb/t19804-2005welding- general tolerances for welded constructions- dimensions for lengths and angles-shape and position.2. specific requirements2.1 requirements of sheet metal before welding2.1.1 all raw materials must meet the requirements of drawing, or shall not be used in material preparation and production. 2.1.2 for the welding steel the flatness shall be no more than 2/1000; the bending is no bigger than 0.3% of the whole length.2.1.3 before welding, the deformation of spare parts must be alignment and leveling.2.1.4 according to the requirements of parts size, material thickness, welded seam size specifications, workers shall choose different specifications welding wire.2.2 welding process requirements2.2.1 welding should in accordance with the drawings, technical and process requirements , if the work piece welded wrong ,treating it as defective products ,welding and cutting again.2.2.2 when welding，the place where require grooves must be grooved. if there are no grooves in the welding material, worker must chamfer and than report the problem to supervisor.2.2.3 when welding, work piece must meet the dimension, form and position tolerances. form and position tolerances of non processing surface shall refer to level c grade of tolerance in gb/t19804-2005 .2.2.4when substitute material is needed for welding .if the thickness of the substitute material cant meet the drawing requirements, it cant be used without technical departments written permission.2.2.5 welded seam must meet the drawings demands. if the length of require intermittent welding size doesnt be demanded in the drawing , welding 8-10mm in every 50mm interval, every welding spot shall be uniform.2.2.6 continuous welded shall be straight and smooth, no obvious rugged, weld penetration, crater, welding pore and undercut. weld corner shall meet the demands of drawings, if there is no demands, ensure the weld corner as big as the minimum thickness of the border upon parts.2.2.7 after welding, polishing every weld seam, clear away the welding slag and peripheral burr.2.2.8 parts which required bending cannot be welded without technical departments written consent.2.2.9 in welding process, parts which need to be struck can be lightly hammering with a small hand hammer to reach the required size. do not hammering with a hammer in the sheet metal plane.3. welding tolerance3.1welding parts linear dimensional tolerances(c) unit :mmbasic dimensions23030120120400300100010002000tolerance requirement134683.2angle dimension tolerance(c) unit:nominal size040040010001000angle tolerance145 303.3straightness, flatness, peace line tolerance（g） unit: mmbasic dimensions3012012040040010001000200020004000tolerance requirement1.525.59114.demands and standards for welding post processing.4.1 weld smoothness.4.2 after welding, the facade of the work piece shall be polished with emery cloth. touched smooth, no welding slag, welding spot and burr. make sure the work piece side flush and surfacing4.3 the weld of the box type work piece shall not be higher than the plane. after puttying the welding line shall be covered, it should be hardly to look out the welding line.4.4 for passing parts, especially the plane which will not be processed again, must be protected, avoided from the damage of electric arc and welding slag, and the welding line shall not be