Coil welding

Process flow
Picking (unloading)	→	reel	→	welding	→	Weld inspection	→	roughing	→	tempering
↓		↓		↓		↓		↓		↓
Receive rough processing materials according to the technical requirements of the drawings		Check length, diameter, thickness		1. Submerged arc welding after electric welding, grinding, priming, grinding and smoothing 2. Internal welding root cleaning, grinding, submerged arc welding		UTflaw detection		Check the outer circle and inner hole size according to the drawing requirements		Tempering and tempering treatment after rough turning of the shaft head


Forging flaw detection	→	roughing	→	Welded barrel and outer panel	→	Stress relief annealing	→	finishing	→	first dynamic balance
↓		↓		↓		↓		↓		↓
UTflaw detection		Check the combination of the web and the shaft head		UT+MTflaw detection		Annealing		According to the requirements of the drawing, the size of each gear and the roll surface should be finished. If necessary, the roll surface needs to be ground.		G6.3/G2.5


Grinding roll surface	→	Chrome plated or painted	→	Fine axle head	→	Dynamic balance correction	→	paint	→	Inspection of finished product packaging
↓		↓		↓		↓		↓		↓
grind toRa<=0.8		Surface treatment according to drawing requirements		Finished to size		Secondary dynamic balance		Both end faces painted as required		According to customer requirements, the package will be shipped after passing the inspection.

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