The process flow of hardware axle processing mainly includes the following steps:

1. Material preparation: Select suitable raw materials according to product requirements, such as carburized steel, quenched and tempered steel, nitride steel, etc.

2. Forging: The raw materials are heated and forged into the desired shape to enhance the strength and toughness of the material.

3. Normalizing or annealing: Heat treatment is performed on the forged workpiece to eliminate forging stress and improve the structure and properties of the material.

4. Punch the top hole: Punch the top hole at one end of the workpiece for positioning and support in subsequent processing.

5. Roughing: Preliminary cutting of the workpiece is performed to remove most of the allowance and approach the final shape.

6. Semi-finishing and finishing: The workpiece is further machined to achieve the required accuracy and surface roughness. For precision hardware shaft parts, the finishing process may need to be arranged before or after quenching heat treatment according to the specific situation.

7. Heat treatment: such as carburizing, quenching, tempering, low temperature aging, etc., to improve the hardness and wear resistance of the workpiece. It should be noted that the hardened parts cannot be machined with general tools.

8. Rough grinding and fine grinding: Grinding the workpiece to achieve higher accuracy and surface quality. For precision shaft parts, finishing is also required.

9. Secondary surface processing: such as the processing of threads, splines, keyways, etc., the accuracy requirements of these secondary surfaces are also relatively high.

10. Quality inspection: Conduct a comprehensive quality inspection of the finished workpiece to ensure that it meets the design requirements.

In the entire process, it is necessary to choose the processing methods and equipment reasonably, and strictly control the processing parameters and process conditions to ensure the quality and efficiency of the processing. At the same time, it is also necessary to properly dispose of the waste generated during the processing to protect the environment and the health of employees.