Hydraulic turbine whole casting runner casting technology based on 3D printing technology
The working load and stress of the whole casting runner products are large,and the internal quality requirements of the castings are strict.Due to the structural characteristics of the product such as complex structure and small operation space,it is difficult to form the runner and control the size.At the same time,the product has many shortcomings such as hot knots and difficult shrinkage,and is prone to turbulence in the casting process,and slag inclusion is not easy to float.In view of the above difficulties,a set of 3D printing sand core runner integral casting technology was developed,through the reasonable design of riser and gating system,and the advanced MAGMA simulation software was used to analyze and optimize the runner casting process,and solve the problems of shrinkage and slag inclusion in the casting process.Through 3D printing,the dimensional accuracy of the runner is guaranteed.The actual test results of the castings show that all the indicators meet the requirements.
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