Special-shaped spring with conventional spring slightly difference is spring itself is irregular, bending and a large number of the Angle of the complicated design, and manufacture craft is also relatively have a requirement, equipment is also more requirements, generally is the computer machine winding, because of the winding Angle, bending, so production speed is slow, because of its complexity, shaped spring production and processing, often can represent a company's technology level.
special-shaped spring processing is
the first: big spring processing, big spring because the wire diameter is very big, hot wire diameter reached 16 -
200 mm, so it is also known as hot springs, hot roll technology on its production process, it is easy to distort after heating forming, and the resilience is very small, when making forming after quenching after treatment.
the second: locomotive spring, is known as the locomotive spring is because its yield strength or you could say hardness is very high, its production process and the big spring processing broadly similar, only in the early spring material of rolling, rolling, drawing, etc are more strict.
the third:
compression spring, because can withstand the force is not usually big so it is called 'compression spring.
Production process compared with the former two high difficulty is not a class, it in the process of remanufacturing due to considering the qualified finished product made from finished goods, so in addition to such as the design of locomotive spring and spring manufacture process, its pre-production material cross section is round, a bit of a special requirement which facilitates made after ability can keep its reply.
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Further dialogue of Yongqiang between the approaches, the chapter concludes, could lead to actionable advice on more robust policies that drive both structural change and competitiveness upgrading.