The primary purpose of turning train wheels is to ensure that the geometric shape and surface quality of the wheels meet standard requirements, thereby improving the contact performance between the wheels and the steel rails and enhancing operational safety. Specifically, the objectives of wheel turning include the following:

Geometric Shape Correction:

Train wheels may lose their original geometric shape due to wear, deformation, or other factors during operation. Turning can correct the geometric shape of the wheels to meet design standards, ensuring compatibility and stability between the wheels and rails.

Surface Quality Improvement:

The smoothness and cleanliness of the wheel surface are crucial for the safe and comfortable operation of vehicles. Turning can remove surface wear and defects, restoring the wheel surface to a smooth, polished condition, reducing friction and noise between the wheels and steel rails, and enhancing ride comfort.

Dimensional Control:

Dimensions such as wheel diameter and flange width significantly impact vehicle performance and safety. Turning allows precise control of wheel dimensions to ensure compliance with standard requirements, thereby guaranteeing normal vehicle operation.

Removal of Surface Cracks and Defects:

Train wheels may develop surface cracks and defects due to various external forces and wear during operation, compromising their strength and safety. Turning can eliminate these cracks and defects,prolonging the wheel's service life and enhancing operational safety.

In summary, turning train wheels aims to ensure that the wheels' geometric shape, surface quality, and dimensions meet standard requirements, thereby improving the contact performance between wheels and steel rails and enhancing operational safety and reliability.