The welding process of steel wheel spoke rim is an important part of the wheel manufacturing process, and its quality is directly related to the overall performance and safety of the wheel. The following is a detailed description of the welding process:

1. Preparation before welding

1. Material selection and processing :

a. The material of the spokes and rims is usually steel, such as SPHC hot-rolled steel plates, etc. The appropriate thickness and specifications are selected according to specific needs.

b. The materials are pre-treated, including shearing, shot blasting, rust removal, oxidation and other steps to ensure the cleanliness and impurity-free of the welding surface.

2. Design and positioning :

a. According to product design requirements, the spokes and rims are designed with precise size and shape.

b. Before welding, ensure that the spokes and rims are positioned accurately, usually using fixtures or positioning pins to fix them to ensure stability and consistency during the welding process.

2. Welding process

1. Rim butt welding :

a. Rim butt welding often uses the flash butt welding process, which is a resistance welding method that can meet the welding strength and appearance requirements.

b. During operation, the jaws and electrodes tighten the two ends of the workpiece, turn on the power, and gradually bring the two ends of the workpiece closer together. Under the action of the large current, resistance heat is generated, causing the metal at the two ends to melt and begin to flash; at the same time, a rapid forging force is applied to make the materials at the two ends tightly combined together.

2. Welding of spokes and rims :

a. The welding of spokes and rims is mostly done by argon-rich gas shielded welding or CO2 welding. These welding methods can provide good welding quality and reduce welding defects.

b. For large wheels, submerged arc welding process can also be used. The welding equipment is usually a special automatic welding machine to ensure welding efficiency and welding quality.

3. Control of welding parameters :

a. During the welding process, welding parameters such as welding current, voltage, welding speed, etc. need to be strictly controlled to ensure the quality and performance of the weld.

b. The setting of welding parameters should be adjusted and optimized according to the specific welding materials and welding processes.

3. Treatment and inspection after welding

1. Weld seam treatment :

a. After welding is completed, the weld needs to be cleaned and trimmed to remove slag and spatter to make the weld surface flat and smooth.

b. For welds that require subsequent processing, grinding or polishing is required according to specific requirements.

2. Inspection and testing :

a. The welded spokes and rims are strictly inspected and tested, including appearance inspection, dimension measurement, dynamic balancing test, etc.

b. The appearance inspection mainly checks whether the welds have defects such as cracks and slag inclusions; the size measurement ensures that the spokes and rims after welding meet the design requirements; the dynamic balancing test is used to detect the rotational stability and balance of the wheels.

3. Quality Control :

a. Establish a complete quality control system to strictly control and manage every link in the welding process.

b. Regularly maintain and service welding equipment to ensure the normal operation of the equipment and the stability of welding quality.

In summary, the welding process of steel wheel spoke rim is a complex and delicate process, which requires strict control of the quality and parameters of each link. Through reasonable welding process and strict quality control measures, it can be ensured that the welded spoke rim has good performance and quality stability.