重型商用车平衡轴支架铁型覆砂铸造工艺设计与优化OACSTPCD

Taking the balance shaft bracket of a heavy commercial vehicle as the research object,based on the structural characteristics and quality requirements of the balance shaft bracket,the sand-lined metal mold casting process scheme of the balance shaft bracket was preliminarily designed and the sample was trial produced.The cutting results of the sample revealed severe shrinkage and porosity defects in the thick area at the root of the balance shaft.The filling and solidification process of the balance shaft bracket casting was simulated using AnyCasting software,and the predicted shrinkage and porosity positions of the casting were consistent with the actual situation.Based on the analysis of the filling and solidification process of the balance shaft bracket and the causes of casting defects,the initial casting process scheme was optimized.The simulation results of the optimized process scheme showed that the shrinkage and porosity defects of the balance shaft bracket casting have been basically eliminated.According to the optimized casting process scheme,a trial production of the sample was conducted again.The cutting results of the sample showed that the shrinkage and porosity defects in the thick area at the root of the original balance shaft have been completely eliminated,and the internal quality of the balance shaft bracket casting met the requirements.