Zhengzhou Gou's takes you to understand the various processes for quenching crankshafts using ultrasonic induction quenching equipment

The crankshaft is an important part of the engines of automobiles, motorcycles, tractors, etc. It undergoes repeated cyclic motion during work. Therefore, improving its wear resistance and service life is the top priority in crankshaft heat treatment. Many manufacturers often use ultrasonic induction quenching equipment to quench crankshafts to meet their performance requirements. Based on his many years of experience, Zhengzhou Gou's will explain to you the advantages and disadvantages of various quenching processes.

1. When the crankshaft does not rotate, use an opening and closing inductor to heat the journal that needs to be heated, and perform liquid spray quenching. Later, a semi-automatic crankshaft quenching machine tool was developed to perform large-scale crankshaft journal quenching. The advantage is low labor intensity, but the disadvantage is uneven hardening area. For example, the hardening layer is wide at the top dead center of the connecting rod journal and hardened at the bottom dead center. Area narrow etc. This process has been used for more than 60 years, and some automobile crankshafts and tractor crankshafts are still produced using this process. 

2. The crankshaft does not rotate. The half-ring main coil and the half-ring auxiliary coil are coupled to heat the crankshaft neck. The advantage is that the heating time is short. The heating time of one journal is about 4 seconds. The equipment occupies a smaller area than the rotating quenching device: the life of the inductor. Long, etc., but this process does not solve the curved corner quenching technology.

3. Crankshaft rotation quenching uses a double half-ring inductor to almost completely cover the crankshaft journal. The advantages of this process are high heating efficiency and short time. Currently, it is only used in car crankshafts.

4. Crankshaft rotation heating uses a semi-ring type inductor and is mass-produced on a semi-automatic or fully-automatic crankshaft quenching machine. The advantage is that the temperature in the quenching zone is uniform and the width is consistent through power pulsation and other technologies. The biggest advantage is that it can Journal fillet quenching improves the fatigue strength of the crankshaft and is currently a widely used crankshaft quenching process.

In summary, using a semi-annular inductor for rotating heating quenching is the best process for crankshaft quenching. Zhengzhou Gou's is a manufacturer that specializes in manufacturing and selling ultrasonic induction quenching equipment. This equipment has complete functions and is easy to operate. Moreover, we can also make induction sensors for you according to your workpiece. It is your first choice for crankshaft quenching. More information about crankshaft quenching processes or equipment can be found on the company website.