Spring manufacturing methods

Spring manufacturing method: in mechanical design, spring often have impact under cyclic loading, so the spring material should have high yield strength, fatigue strength, impact toughness and good heat treatment performance. The commonly used spring material with high quality carbon steel, alloy steel, non-ferrous metal alloys. Spring mainly include: the effect of controlling movement or limit position, example of the CAM mechanism, clutch, valve spring, etc. ; Spring cushion and vibration absorption, such as vehicle, playing yellow coupling in the spring, etc. ; Stored energy, such as clocks, instrument in spring; Measuring the force and torque, such as the spring in spring balance and force-measuring device; Spring manufacturing technology mainly includes the winding ends, the production of hook or surface machining, heat treatment and the process performance test and the necessary crush or shot peening strengthening processing. Winding method has two kinds of cold and hot roll. Diameter of less than eight 10 mm spring steel wire made of spring in the cold roll, cold roll, overheating in advance of the multi-purpose cold drawn spring processing of high quality carbon spring steel wire, rolled up only after low temperature tempering, to eliminate internal stress. Larger diameter of the spring steel wire to make spring when use hot rolled, according to different spring wire diameter, the hot temperature in the 800 - volume After 1000 ℃ range selection, rolled to quenching and tempering treatment. For important compression spring, in order to ensure that both ends of bearing surface and its vertical axis, end ring should be worn on special grinding machine, to lessen the chance of skew during loading on; For tensile and torsion spring, to facilitate the connection and loading, both ends should be made. In order to improve the bearing capacity of the spring, can crush, strong pull processing or shot peening treatment. Compression spring pressure processing is in after the spring roll, with more than the spring material elastic limit load spring compression to the ring in contact, keep 6 - at the same time 48 h, thus to produce plastic deformation in the spring wire, the residual stress in the spring after unloading. Because the direction of the residual stress and working stress, on the other hand, spring * big stress at work than without crush processing spring is small, so can improve the bearing capacity of the spring. The tensile spring is strong pull handle. Spring after crush, strong pull handle, do not allow any heat treatment again, unfavorable also in high temperature - 150 450 ℃ and long-term work under vibration condition, otherwise will lose the function.
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