The gear shift block uses a 60kw high-frequency induction heating power supply for quenching heat treatment process

The shift paddle is an important part of the car and plays an extremely important role in the overall operation of the car. For this reason, in order to improve its service life, many manufacturers usually use 60kw high-frequency induction quenching power supply for quenching heat treatment. However, the previous quenching process always has defects of one kind or another. Zhengzhou Gou's has developed a new heat treatment process through continuous research. Today, we will talk about the heat treatment process of the shift paddle.

(1)Materials and processes used in shift paddles

The material used for the shift paddle is ZG45, the depth of the hardened layer in the induction quenching area is 1-2mm, and the hardness is 52-57HRC. This part is often quenched and heat treated on a high-frequency induction heating power supply, but there are some defects that cannot meet the requirements. Through continuous experimental research, Zhengzhou Gou's found that sensors are an important factor. So we designed a new type of sensor.

(2) Improvement of sensor structure

Taking into account the particularity of the part structure, in order to ensure that the quenching working surface is heated evenly and that there is a certain depth of the quenching layer without being quenched through, a high-efficiency dish-shaped double-turn inductor is used. The original inductor used is a three-strip single-turn inductor, which mainly relies on the single strip in the middle to heat the parts, and the heating efficiency is low (heat loss is large). The improved butterfly-shaped double-turn inductor is used, which mainly relies on the double strips in the middle to heat the parts. The current is distributed on the outside, which generates a stronger magnetic field than the original single-turn inductor. The effective part can be distributed compared with the conductive part. Obtain a larger proportion of voltage, and at the same time obtain a better ratio of anode current and gate current, so that the output power of the equipment meets the quenching requirements of parts, improves heating efficiency, and saves energy. We once conducted an experiment using two sets of inductors made of 6mm and 8mm copper tubes respectively. The results showed that after the inductor made of 6mm diameter copper tubes was heated, although the parts were not hardened, the heating area was narrower. After the inductor made of 8mm diameter is heated, the quenching problem is solved, but the quenching area is distributed in an oblique triangle, which also meets the requirements.

(3) Improvement of cooling method

When using a high-frequency induction heating power supply for induction hardening, the surface of the part is in a high-temperature distribution state. At the same time, the wall thickness of the thin end of the part is about 6.7mm, which is very thin, and the upper and lower dimensions are very different. Therefore, by immersing about 2/3 of the thin end wall thickness in a small special water tank, when heated, the thin end is cooled due to the heat absorption of the water, thus solving the problem of hardening of the thin wall end.

The inductor is an important part of the high-frequency induction heating power supply and a necessary part for the heat treatment of the workpiece. The quality of the inductor design directly affects the quality of the heat treatment of the workpiece. As a professional manufacturer of induction heating equipment, Zhengzhou Gou's is quite familiar with the manufacturing of inductors. If you want to make a sensor, you can contact us.