Cold-extrusion forming method for unsymmetrical ferrule blanks

A cold-extrusion forming method for unsymmetrical ferrule blanks, the method comprising:

• step 1, cutting a metal pipe to obtain a plurality of ferrule blanks:
• step 2, surface treating the ferrule blanks by first subjecting a surface of the ferrule blanks to a shot-blasting pretreatment and then successively subjecting the shot-blasted ferrule blanks to steps of washing, phosphating, washing, saponification and drying;
• step 3, cold extruding the surface treated ferrule blanks to become unsymmetrical ferrule blanks;
• wherein the cold extruding is performed by a device for cold extrusion, the device comprising:
• an automatic feeding means, which comprises a material hopper (1), the material hopper (1) is connected to an elevator (2), the elevator (2) is connected to a material tank (3), the material tank (3) is connected to a conveyor (4), an end of the conveyor (4) is provided with a feeding station (5), one side of the feeding station (5) is a cold extrusion lower die (6) and the other side is a disc material-conveying assembly (7), and an outer wall of a cold extrusion punch press (100) is provided with a transmission bevel gear assembly (8) which drives the disc material-conveying assembly (7) to be close to or away from the feeding station (5) so as to push the ferrule blank on the feeding station into the cold extrusion lower die (6);
• the transmission bevel gear assembly (8) comprises a first transmission shaft (9) and a second transmission shaft (10) which are provided on the outer wall of the cold extrusion punch press (100) and mesh with each other, the first transmission shaft (9) being horizontally arranged, and the second transmission shaft (10) being vertically arranged;
• and the disc material-conveying assembly (7) comprises a feeding frame (11), a disc (12), and a connecting rod (13) rotatably connected to the disc (12), with one end, away from the disc (12), of the connecting rod (13) being connected to a manipulator (14), an end of the manipulator (14) being located at a position corresponding to the feeding station (5), the disc (12) being arranged on the feeding frame (11) and rotatably connected to the feeding frame (11), and the manipulator (14) being slidably connected to the feeding frame (11).