A compressor crankshaft semi-solid squeeze casting forming mold and forming process

Abstract

The invention provides a semi-solid extruding and casting molding mould and molding process of a compressor crankshaft. The mould comprises an upper mould and a lower mould, wherein a closed space is formed by carrying out die assembly on the upper mould and the lower mould and serves as a cavity of a extruding and casting piece of the compressor crankshaft; a puncher pin passes through a hole at the center of the lower mould to enter the cavity; a template of the upper mould is fixedly connected with a lug boss part at the top of the upper mould through a pressing rod; the top of a mould core is fixedly connected to the template of the upper mould through a thread; a piston rod passes through the center of the template of the upper mould; the flange end at the lower part of the piston rod is in threaded connection with a pressurizing plate to drive the pressurizing plate to move in the space of a groove at the upper part of the upper mould; the bottom face of the pressurizing plate is connected with an annular lug boss; and the mould core passes through a middle hole of the annular lug boss and is inserted into the top of the mould cavity. In the molding process, semi-solid slurry is adopted to fill the mould, a casting temperature is low, and a mould filling process is gentle; and an extruding and casting method is adopted for molding. Therefore, the molding mould and the molding process have the advantages that the material utilization rate is high, the service life of the molding mould is long, tissues of a molded piece are dense, and the production efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of compressor crankshaft forming, and in particular relates to a compressor crankshaft semi-solid extrusion casting forming die and forming process. Background technique [0002] At present, the production of compressor crankshaft mainly adopts the method of metal mold gravity casting. Due to the large gating and riser system, the material utilization rate is low, the scrap rate is high, the processing volume of castings is large, and the production efficiency is low. [0003] The semi-solid forming technology originated in the 1970s, has gone through basic research, technology development, and equipment development, and has now entered the stage of industrial application. Compared with liquid metal casting, semi-solid metal has a certain volume fraction of spherical primary solid phase, and semi-solid metal formed parts are dense, with high mechanical properties, less machining, and long mold life; compared...

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Problems solved by technology

[0005] So far, there are no relevant reports on the application of semi-solid forming technology to the production of compressor crankshafts.

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