Extrusion device and extrusion method for hollow helicoid rotor profile with internal key groove

Abstract

The invention discloses an extrusion device and an extrusion method for a hollow helicoid rotor profile with an inner key groove. The device comprises an upper die and a lower die, wherein one end of the upper die is provided with at least one diversion chamber, and the other end of the upper die is provided with at least two shunting holes communicating with the diversion chamber; a shunting bridge is arranged between every two adjacent shunting holes; a blocking table is arranged at the intersection of every two shunting bridges; the end, away from the diversion chamber, of the upper die is connected with a die core; the end, connected with the upper die, of the lower die is at least provided with a first-stage welding chamber, the end, far away from the upper die, of the welding chamber communicates with an orifice of the lower die, and the end, far away from the upper die, of the die core is sequentially inserted into the welding chamber and the orifice of the lower die; the diversion chamber, the shunting holes, the welding chamber and the orifice of the lower die communicate in sequence; and a transition key structure and a key structure which are connected in a matching manner are arranged on the outer wall of the die core. According to the extrusion method based on the device, light alloy is adopted for direct extrusion forming of the hollow rotor, the machining efficiency and blank utilization rate are high, and the production cost is low.

Description

technical field [0001] The invention relates to the technical field of metal extrusion, in particular to an extrusion device and an extrusion method for a hollow helicoid rotor profile with internal key grooves. Background technique [0002] As the core components of superchargers, screw compressors, helical rotameters and other equipment, helicoidal rotors are widely used in important fields such as automobiles, machinery, chemicals, metallurgy, construction, mining and aerospace. At present, the processing of helicoidal rotors is mainly based on various cast or forged steel round bars, which are formed by traditional machining (such as hobbing, milling, turning, grinding, planing, etc.). On the one hand, traditional machining has high requirements for machine tool structure and tool design, and machining is difficult, which limits its application range, and the machining efficiency is low, raw materials are wasted, and the production cost is extremely high, which seriously...

AI Technical Summary

Problems solved by technology

However, there is currently a lack of extrusion methods and processes for helicoidal rotor profiles with continuous hollow and internal connection structures.

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