Select high-quality raw materials such as aluminum alloy, carbon fiber or titanium alloy for bicycle frames, and precisely cut them into required pipes or prepreg blanks by CNC equipment according to the size and specifications of the frame design drawings.
For metal frames, perform bending and reducing forming processes on pipes to ensure the pipe curvature matches the frame design; for carbon fiber frames, lay prepreg layers on the frame mold according to mechanical design.
For metal frames, use TIG welding to precisely weld formed pipes to ensure joint strength and flatness; for carbon fiber frames, put the layered mold into an autoclave and cure it by controlling temperature and pressure.
Grind and polish the welds of the welded metal frame to remove burrs and unevenness; trim the edges of the molded carbon fiber frame to ensure a smooth surface and accurate dimensions.
Drill holes at designated positions on the frame as designed for installing components like derailleurs and brakes; then conduct pre-assembly tests to verify the adaptability of each component installation position.