Welding of compression spring
Welding of compression spring
(OP)
whether we can weld compression spring to sheet metal panel?
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Welding of compression spring
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Welding of compression springWelding of compression spring(OP)
whether we can weld compression spring to sheet metal panel?
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RE: Welding of compression spring
RE: Welding of compression spring
G Roberts
RE: Welding of compression spring
RE: Welding of compression spring
I aggree with all of you that welding of spring is a bad idea due to High Carbon. But I want ti try it for certain application.
I have taken trial on resistance spot welding & I could weld the Spring with inactive turns.
But I am uncertain whether the weld / spring will withstand for dynamic conditions. Also I wish to know how to qualify such welding on spring?
RE: Welding of compression spring
1. Visual inspection of the weld. Look for obvious defects like cracks, porosity, etc. Other welding faults include burn-through, pitting, gaps between the spring and sheet, metal press-out between spring and sheet (spatter) and surface spatter, excessive indentation, and electrode fusing.
2. Destructive testing of the weld. Typical tests would be shear, peel, and torsion testing. Evaluate test for ultimate load/force. Evaluate fracture surfaces for cracks, pores, spatter, insufficient bonding/penetration/fusion, inclusions, etc. An intact weld will produce a weld button equal to the spot weld diameter. Destructive tesing should also include dynamic testing should as fatigue and impact conditions. Parts that pass an ultimate test will quite often fail these tests due to internal defects or cracks that nucleate and propagate during the test.
3. Metallurgical inspection of the weld. Prepare metallographic cross-sections and inspect for penetration, weld bead diameter, porosity, inclusions, blowholes, etc. Etch the cross-section with acid and evaluate the microstructure. Is the heat-affected zone excessive? The fusion zone will probably have a terrible microstructure (almost entirely untempered martensite). You may want to consider a low-temperature stress relief that will also serve to temper the martensite in the weld so that is will not be as brittle.