Process for manufacturing heavily stressed valve spring
A technology of valve spring and manufacturing process, which is applied in the field of manufacturing process of high-stress valve spring, can solve the problems of free length fluctuation of walking spring and high product manufacturing cost that affect the quality, concentricity and helix angle of spring products, and achieve quality improvement and Product qualification rate, production cost reduction, and the effect of concentricity improvement
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[0044] The specific implementation of the high-stress valve spring manufacturing process of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0045] see figure 2 , figure 2 It is the process flow chart of high stress valve spring manufacture of the present invention, as can be seen from the diagram, the process flow of spring manufacture of the present invention:
[0046] Coil spring → first tempering → grinding spring → chamfering → stress optimization (SOF) → second tempering → first shot peening → second shot peening → hot pressing → load classification → oiling.
[0047] Each process in the above process is described below.
[0048] The coil spring process is to roll the steel wire blank into a semi-finished spring.
[0049] The first tempering process is to roll and shape it into a semi-finished spring for the first low-temperature tempering to relieve stress.
[0050] The spring grinding process is to grind the...
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