How do we solve the problem of continuous hardening layer of variable cross-section parts when the ball head thrust rod is quenched using ultrasonic induction heating equipment?

In order to improve the wear resistance and service life of the ball putter, we need to perform quenching heat treatment on the ball putter. We mostly use ultrasonic induction heating equipment for its quenching heat treatment. However, for ball head thrust rods with large cross-section changes, it is still difficult to perform quenching heat treatment with ultrasonic induction heating equipment. For details of the difficulty, please refer to "Zhengzhou Gou's Analysis Ball" In the article "Technical Difficulties in Induction Heat Treatment of Head Thrust Rod Using Super Audio Induction Heating Equipment", today, we will talk about the problem of continuous hardening layer in variable cross-section parts, our solutions and its application.

For parts whose cross-section changes are not too large, when we use ultrasonic induction heating equipment for quenching, we design a profiling inductor based on the traditional one-time heating quenching inductor. The effective circle of the inductor is designed according to the shape of the part, so that the effective The gap between the ring and all parts of the part should be even or the gap at the root of the step should be further reduced. This technology is used for parts such as various flanges with fillet quenching and ball pins with little change in cross-section.

For parts with large cross-sectional changes, a rectangular inductor is designed. The heating characteristic of the rectangular inductor is to form a transverse magnetic field and form an axial induced current on the surface of the part, that is, transverse magnetic field and longitudinal current heating. The advantage of this technology is that the shielding effect of the step is weakened, the induced current can be obtained at a certain depth at the root of the step, and the surface heating zone is continuous, thereby making the hardening zone continuous. Suitable for various stepped shafts, ball screws, screws and other parts with small cross-sectional changes.

For parts with large cross-section changes, the design of the inductor needs to be further improved. On the basis of the rectangular inductor, a circular effective ring dedicated to heating the root of the step is added, and a magnetic conductor is installed. This technology is a development of transverse magnetic field heating technology. It was developed in the 1990s and has been applied in the heat treatment of large step shafts.

We can see from the above description that the key to solving technical difficulties lies in the sensor. The sensor is an important part of the equipment and is a part that performs heat treatment on the workpiece. Zhengzhou Gou's has been engaged in the production and sales of ultrasonic induction heating equipment for nearly 20 years, and has a good understanding of the design and production of sensors. If you want to know more about sensors, please feel free to leave us a message.