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 yqgm@yongqiang-group.com ;sales@yongqiang-group.com

The spring strength how to judge?

by:Yongqiang     2020-09-15
Limited due to the product structure, more spring has features of high strength and good performance in general. Request the material on the spring strength and toughness of the final performance guarantee. More strands of spring in the machining process, should pay attention to is:


1, bearing ring can be chosen according to the product requirements of cold and heat and two methods. Using thermal and spring are not allowed to be heated to spark or white, silicon manganese steel temperature is not higher than 850 ℃. With effective support circle should be effective contact, clearance shall not exceed 10% of the nominal gap between circle.


2, many strands of spring can be adjusted by the lead decision, winding line distance can make the necessary adjustments. Screw pitch desirable 3 ~ 14 times wire diameter, but generally take 8 ~ 13 times is preferred. The spring force and free height, and end ring, outside diameter and the steel wire performance is closely related, and can be adjusted through changing one or a few.


3, without supporting ring of spring and spring steel wire diameter interloper spring should not be welding head, but end wire should not have obvious loose, deburring. Would all the welding head more strands of spring, the weld length should be less than three times the cable diameter ( The longest not greater than 10 mm) 。 Heating length should be less than a circle, should be polished smooth after welding, gas welding when the welding parts should be partial annealing at low temperature.


4, spring general for phosphating surface treatment, can also be other processing. All must carry on the coating of zinc and cadmium, should be in addition to the hydrogen treatment after plating, after eliminating hydrogen extraction (3% Not less than 3) Second interview set processing, can not have fracture in the second-round exam. Spring should be cleared surface dirt, salt mark, scale, method can be used to blow sand or gasoline cleaning solution, but not by pickling.


5, important spring compression time is 24 hours, ordinary spring for 6 hours or continuous compression 3 ~ 5 times, each time to keep 3 ~ 5 seconds. The clearance between the spindle and when the compression spring with core shaft diameter 10% advisable, gap is too small, seldom operation, clearance is too large, easy to result in bending deformation of the spring. If press when one spring break, then the rest should deal with afresh.





tensile spring ( Also called torsion spring, tension spring) Is the spiral spring under axial tension, [ Tension spring are generally made of material with circular cross section. When not under load, tensile spring between the circle and circle are generally no clearance and tight.
Over the years, has become very popular as more and more people are trying it out.
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Along the way, Dongguan Yongqiang spring hardware Co.,Ltd. will face a wide range of challenges. The most successful will show our resolve by working through the challenges and finding ways to improve and grow.
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