前叉下管铸件的铸造工艺设计

介绍了前叉下管铸件的结构及技术要求,详细阐述了其铸造工艺设计:采取垂直分型,膨润土湿型砂造型;采用底注式浇注系统,圆锥形直浇道的截面面积为972 mm2,横浇道与直浇道、内浇道相连接,横浇道为截面积1 200 mm2的标准梯形浇道,内浇道的截面面积为420mm2,选用六角形浇口杯,浇注速度为8.12kg/s,浇注时间为5s,浇注温度为1580℃;采用12个尺寸为30mm×60mm×75mm的冷铁,选用腰形暗冒口,尺寸为a=50 mm,b=100 mm,h=100 mm;选择扁形出气孔。模拟结果显示,整个铸件未发现有缩孔、缩松等铸造缺陷,而且工艺出品率也达到了76.53%。

Casting Process Design of Front Fork Tube

The structure and technical requirements of front fork tube were introduced. The casting process was elaborated as follows：vertical parted mould,wet bentonite mould sand and bottom gating system were used. The sectional area of conical sprue, trapezoidal runner and ingates were 972 mm2,1 200 mm2 and 420 mm2,respectively. The pouring cup was hexagonal and the pouring was carried out at 8.12 kg/s for 5 s at 1 580 ℃. There were 12 chills in the size of 30 mm×60 mm×75 mm and a frustumshaped blind riser in the size of a=50 mm,b=100 mm,h=100 mm and a fiat air outlet were used. Simulation results show that no shrinkage and other casting defects were found and the rate of finished products reached 76.53 %.