Powder metallurgy has experienced rapid development in China in recent years. Seizing the opportunities of the era and operating within a favourable external environment, Kaiyang Powder Metallurgy Company has persevered through arduous endeavours and continuous innovation. Within a mere decade, it has surged to the forefront of the industry. Numerous technological breakthroughs have been achieved, such as the assembly of multiple powder metallurgy products.

The advancement of powder metallurgy has increasingly enabled its application in multi-step, structurally complex, and irregularly shaped products, particularly automotive components. However, constrained by the forming principle of powder metallurgy (stamping principle), product blanks often cannot be formed in a single operation. They must be pressed into two or more separate blanks, assembled into composite blanks, and then processed through subsequent steps to achieve the required product. Kaiyang Powder Metallurgy Company, drawing upon its robust technical foundation and extensive practical production experience, has accumulated substantial expertise in researching the principles, methodologies, and key technologies of powder metallurgy component assembly.

1. Formed blank assembly:

The formed blanks are assembled as a loose fit, as illustrated in Figure (1). Blank A's outer diameter is slightly smaller than Blank B's inner diameter. The two blanks are precisely assembled by hand using locating slots and bonded together through sintering:

2. Sintered blank assembly:

Sintered blanks are assembled as an interference fit, as illustrated in Figure (II). After sintering, the outer diameter of blank A is slightly larger than that of blank B. Using locating grooves, blank A is pressed into blank B by machine force to form a press-fit assembly:

Powder metallurgy component assembly can be categorised into formed blank assembly and sintered blank assembly. Assembly methods include loose fitting, interference fit, and reinforced pin assembly (intermediate between the two); assembly between parts of identical materials, assembly between parts of different materials, and copper diffusion bonding assembly. The specific assembly method must be determined based on the product's process, structure, and technical requirements.

The significance of powder metallurgy assembly processes:

The assembly of powder metallurgy components overcomes the limitations of traditional powder metallurgy, reducing the need for subsequent machining operations. This enables their broader application across electrical, mechanical, and automotive sectors.