Reed Induction Heating Equipment

The circular spring is an important spring part for supporting and damping the car body. It is made of 60Si2Mn steel bar with a diameter of 14.53mm. The manufacturing and processing flow of the round spring is: blanking, heating, rolling, heat treatment, heat setting, shot peening, phosphating and painting. At the same time, the surface condition is required to be high, the dephosphorization layer is ≤ 0.1mm, and the hardness of heat treatment is 47 - 51hrc. The heat treatment of the round spring should adopt the protective atmosphere heating or induction heating. Some enterprises are limited by the equipment conditions. The resistance heating method is used to heat and quench the round spring, and good results are obtained.

The resistance heating method is to heat the workpiece with its own resistance after it is electrified. In the process of workpiece heating, because the round spring is a slender and easily deformed part, in order to ensure that the workpiece has a small deformation, the round spring heating fixture is designed and manufactured, as shown in figure 8-90. The clamp chuck is made of Y4 steel and lined with graphite. Consider the round spring heating fixture, as shown in figure 8-90. The clamp chuck is made of Y4 steel and lined with graphite. Considering that the current of heating parts is large, two cables are used for wire connection, the two poles are connected with heating spring parts, and the other two poles are connected with transformers. The schematic diagram of cable connection is shown in figure 8-91. In addition, the heating groove of the workpiece is made with channel steel as the support and refractory brick as the lining; the copper sheet is padded between the collet and graphite, and the copper bolt is used for connecting the cable and the collet to reduce the resistance of the collet.