Is the development prospect of automobile spring processing technology big?

At present, the machining equipment and production line of mechanical valve spring are developing towards the depth and breadth of numerical control (NC) and computer control (CNC). However, as spring materials and geometry changed, so did processing techniques.

1) Variable spring diameter, variable pitch and variable wire diameter (three variables) suspension spring to achieve non-forming processing. Conical rebar has been used for winding on CNC lathes due to the development of three transformer springs, but the final product and price are not ideal. Now, it is necessary to control the rolling speed and tensile force by the coil spring machine in the heated state to obtain the desired conical shape, and to quench it using the processing waste heat.

2) Hollow stable spring rod is made of low carbon boron steel plate, rolled and welded.

3) The torsion bar is made of high purity 45 steel, and after high frequency quenching, the surface has higher hardness and greater residual compressive stress, so as to improve the fatigue life and anti-relaxation.

4) The plate spring widely used in electronic products is basically formed by stamping and automatic bending. At present, the main development of composite materials combined technology.

5) Multi-stage shot peening and liquid nitriding processes are mainly developed for valve springs to improve surface residual compressive stress and fatigue life.