The B4125 crankshaft uses a medium frequency induction heating machine for quenching heat treatment. What does its inductor look like?

When the B4125 crankshaft uses a medium frequency induction heating machine for quenching heat treatment, the quenching process is mainly implemented through an inductor. Therefore, the quality of the inductor directly affects the quenching process of the B4125 crankshaft. Today, the editor will tell you about the B4125 crankshaft quenching sensor.

B4125 crankshaft has 11 quenching parts in total, including 5 main journal surfaces, 4 connecting rod journal surfaces, 1 flange surface, and 1 thrust surface. The connecting rod journals are the same size and the main journals are available in 3 sizes. Based on the characteristics of the B4125 crankshaft, 4 types of open semi-annular sensors are designed, namely 2 types of main journal sensors, 1 type of connecting rod neck sensor and 1 type of flange-thrust surface sensor. Among them, the flange-thrust surface sensor can quench the flange surface and the thrust surface at one time. This type is relatively special. The key is to solve the heating matching problems of the flange surface and the thrust surface. The sensor that realizes fillet quenching is specially designed to ensure that the fillet quenching layer is evenly distributed. After the heating is completed, the water spray box attached to the sensor sprays liquid to cool the heated part of the workpiece. The entire process is realized through computer automatic control.

According to the actual production conditions, spray cooling and self-tempering processes are adopted. In order to meet the requirement of not changing the sensor during the quenching process, it was decided to use two independent machine tools to complete the quenching task of a B4125 crankshaft. That is, one machine tool completes the quenching of the main journal, and the other machine tool completes the quenching of the connecting rod neck, flange surface and thrust surface. Each machine tool has two stations, each station has an independent quenching transformer and sensor group, and the workpiece moves vertically and horizontally. In order to further reduce the operator's labor intensity and improve production efficiency, CNC technology is used to automate the entire induction heat treatment process (mechanical action and induction quenching process).

Although there is no need to replace the sensor when performing induction heating of the B4125 crankshaft, in order to expand the adaptability of the machine tool and have a certain degree of versatility to meet the production needs of multiple varieties and different batches of workpieces, a quick-change sensor was designed using the clamping principle. The connector realizes sensor, water, and electricity connection and has self-locking performance. The connection can be completed within tens of seconds, and the operation is convenient and reliable.

This article briefly introduces the inductor used for induction quenching of B4125 crankshaft. If you want to know the specific process of B4125 crankshaft quenching, you can read more books on heat treatment. I believe you will gain a lot.