Abstract
Since the casting process of large castings is complicated, the optimization of process parameters has a significant impact on product quality. In this paper, main technical parameters of male thread casting in screw expansion power machine were compared and analyzed with simulation analysis method and an applicable speed and temperature for male thread casting was obtained by mainly considering the entrapped air and the surface defect density. In general, the analysis methods provided herein, offers a viable way to optimize the quality of large machine components while casting. This can benefit the productivity and cost saving.
Highlights
The filling process during casting is unstable and hard to control
Main technical parameters of male thread casting in screw expansion power machine were compared and analyzed with simulation analysis method and an applicable speed and temperature for male thread casting was obtained by mainly considering the entrapped air and the surface defect density
The analysis methods provided offers a viable way to optimize the quality of large machine components while casting
Summary
The filling process during casting is unstable and hard to control It accompanied by liquid metal flow, temperature variation, flow area shifting and other complex phenomenon. It can cause product defects, such as blowholes, short-poured and cold shut. The researchers simulated the filling process of liquid metal flow into a rectangular cavity with two-dimensional method, and it proved to be a stepwise vertical filling process. On this basis, the computer numerical simulation for filling process started blooming.
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