Patent ID: 11890701
Assignee: SHANGHAI INSTITUTE OF OPTICS AND FINE MECHANICS, CHINESE ACADEMY OF SCIENCES
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 13:
14. An electrode cap for resistance spot welding, which comprises:
a cylindrical electrode cap body (1);
a contact surface (3) with a welding surface (31), a circumference (32), and a groove (33), wherein the groove (33) is located in the center of the contact surface (3), a upper edge of the groove (33) is connected with the welding surface (31), and the circumference (32) is the outer diameter of the welding surface (31);
a side surface (2) which is a transition area from the electrode cap body (1) to the contact surface (3), and has a shape of an arc surface or a tapered surface;
wherein an upper surface and a lower surface of the side surface (2) are respectively connected with the contact surface (3) and one end of the electrode cap body (1) in the form of arc;
which further comprises a ring-shaped ridge (4) located on the welding surface (31) or groove (33), and a cross-sectional shape of the ring-shaped ridge (4) is a straight line, a curve or a combination of a straight line and a curve.