Induction Hardening Automotive CV Joints
Induction Hardening Tempering Automotive CV Joints
Induction hardening is a common method for hardening automotive CV joints, which are components that transfer torque and rotation between the drive shaft and the wheels. CV joints are exposed to high stress and wear, so they need to have high hardness and durability on their surface. Induction hardening can provide these properties by heating and quenching the CV joints in a precise and controlled manner.
How to do the CV joints induction hardening coil?
The structure of the heating inductor for the spline part of the bell-shaped shell is shown in Figure 2, and the structure of the heating inductor for the inner cavity of the bell-shaped shell is shown in Figure 3.
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How to do automotive CV joints hardening and tempering process?
To do automotive CV joints hardening and tempering, you need to follow these steps:
- Prepare the CV joints for hardening by cleaning them and removing any grease or dirt. You also need to select the appropriate induction coil and quenching medium for the part geometry and material.
- Place the CV joints inside or near the induction coil, which generates an alternating magnetic field. This induces an electric current in the part, which causes it to heat up rapidly to a high temperature (usually above 800°C) for a short time (usually a few seconds).
- Quench the CV joints rapidly with water, oil, or a water-polymer solution. This cools the part quickly and prevents carbon from precipitating out of the steel. This creates a hard and brittle martensitic layer on the surface of the part.
- Temper the CV joints by heating them again to a lower temperature (usually between 150°C and 650°C) for a short time (usually a few seconds). This reduces the brittleness and increases the toughness and ductility of the part. Quench the part again to prevent further tempering due to residual heat.
- Check the hardness and quality of the hardened and tempered CV joints by using a hardness tester, a microscope, or other inspection tools. Make sure the hardness meets the specifications and there are no defects such as cracks, distortion, or decarburization.
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1 年Nice article Elin Wong. As you write, choosing the right coil is very important, to add to that, an equally important part is setting the right Frequency, Power and Motion parameters over time. Did you know you can get the desired result, without destructive testing by running simulations? Here is how a CV-Joint Hardening example looks in CENOS Induction Heating Feel free to write me a message if you'd like to learn more about it.