Composite material structure and processing method thereof

A method of processing a composite material structure, the method comprising:

• providing the composite material structure, the composite material structure comprises a first metal member and a second metal member bonded together, wherein a bonding surface is formed between the first metal member and the second metal member, a material of the first metal member is different from a material of the second metal member, the second metal member comprises a main body;
• drilling a first hole through the first metal member so that one end of the first hole reaches the bonding surface, a circular bonding line is formed in the bonding surface adjacent to the one end of the first hole, and the circular bonding line is exposed from the first hole;
• and
• processing the main body of the second metal member from the first hole of the first metal member by hot melting to define a second hole and a sleeve surrounding the second hole, wherein the sleeve extends into the first hole, and the sleeve covers the bonding line.

A composite material structure comprising:

• a first metal member defining a first hole therethrough;
• and
• a second metal member bonded to the first metal member, a material of the first metal member being different from a material of the second metal member, the second metal member comprises a main body and a sleeve protruding from the main body, the sleeve extends into the first hole and abuts against an inner wall of the first hole, a second hole is defined by the sleeve, the second hole communicates with the first hole;
• wherein the sleeve is formed by processing the main body of the second metal member from the first hole of the first metal member through hot melting.