Method for integrally forming bicycle stem and handlebars

A method for integrally forming a bicycle stem and handlebars, comprising the following steps:

• Material Preparation Step S1:
• Using casting processing to form a metal billet (100) with an initial stem blank (100A) and a rough handle blank (100B);
• Pre-processing Step S2:
• Placing the metal billet (100) into a mold cavity (201) of a mold (200), each of two ends of the mold (200) having a punch opening (202) communicating with a space of the mold cavity (201), the mold cavity (201) including a first section (2011) and two second sections (2012) which are connected to two sides of the first section (2011), the initial stem blank (100A) located corresponding to the first section (2011), the rough handle blank (100B) located corresponding to each of the second sections (2012);
• Initial Forging Step S3:
• Processing the mold (200) containing the metal billet (100) so that the metal billet (100) is shaped in the mold cavity (201), after shaping, the metal billet (100) forming a stem part (101) and two handlebar parts (102), the stem part (101) and the two handlebar parts (102) are both solid and integrally formed;
• Punch Forging Step S4:
• Using two punch parts (301) of a punching device (300) aligned with the two punch openings (202) of the mold (200), inserting the two punch parts (301) into the mold cavity (201) through the corresponding punch openings (202) to punch the ends of the two handlebar parts (102) so as to form an end hole (103) at the end of each of the two handlebar parts (102), a depth of each end hole (103) being shorter than a length of each handlebar part (102), and
• Processing and Finishing Step S5:
• Removing the metal billet (100) with the end holes (103) formed by the punching device (300) from the mold (200), and processing and finishing a surface of the metal billet (100) and an interior of the end holes (103).