A High Frequency Fluttering Cold Extrusion Die

Abstract

The invention discloses a high-frequency flutter cold extruding die. The die comprises a forming mechanism and a flutter generation mechanism. The flutter generation mechanism comprises two independent flutter generators. Each flutter generator comprises a cylinder barrel base, a cylinder barrel, a piston, a piston rod and a cylinder barrel top cover. The cylinder barrels are connected with the cylinder barrel bases and the cylinder barrel top covers in a welding mode. The piston rods and the upper ends of the pistons are located through shaft shoulders, and the piston rods and the lower ends of the pistons are connected through welding. The cylinder barrel bases are connected onto a lower die holder through bolts, the cylinder barrel top covers are connected with a lower die plate, and the two flutter generators are disposed in the same straight line symmetrically. The die is simple and compact in structure, low in production cost, capable of providing to different flutter applying modes, large in vibration output force, controllable in frequency and amplitude and capable of guaranteeing the size accuracy while 'difficultly forming parts' vibration extrusion is completed.

Description

technical field [0001] The invention relates to a vibration extrusion die, in particular to a high-frequency flutter cold extrusion die. Background technique [0002] Cold extrusion is to make the metal volume plastic transfer without destroying the metal, so as to achieve metal forming with less chips or no cutting. Compared with traditional mechanical processing methods, cold extrusion has less material consumption and higher production efficiency. , Superior mechanical properties, can form complex shape parts and so on. With the rapid development of the automobile manufacturing industry, the demand for high-precision and complex-shaped auto parts is increasing, especially some parts that are difficult to machine and have high processing costs, such as cylindrical spur gears, cylindrical helical gears and Spline shafts, etc. are also required to be directly formed by cold extrusion; however, when cold extruding such parts, due to their complex shape, the flow stress of th...

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