铸钢旋转平双耳的挤压铸造

Preparation of Steel Traverse Plain Double Ear by Squeezing Casting

采用间接挤压铸造,水平分型,1模4件生产铸钢旋转平双耳。配备的侧挤缸带动侧抽杆进行零件孔的成形。采用内置水冷铜管调节模具温度。为防止模具表面温度过高及钢液对模具的冲击,模具表面喷涂绝热涂料。试生产结果表明,新工艺材料利用率接近75%,成品率可达92.5%。得到的产品内部无缩松、缩孔缺陷,表面光洁,组织致密,符合技术要求。

Production of steel traverse plain double ear by indirectional casting was performed, in which the horizontal parting with four-part-in-mould was adopted. Liquid metal was squeezed to fill the cavity and solidify formation by bottom punch, and the castings were pulled by the top tray driving the knockout pin based on the upper punch impelling the top tray in the squeezing casting machine. In addition, the casting pole was formed by assembling side-oil cylinder to drive the side-pole. The mould was cooled by inner-set water-cooled copper pipe. Meanwhile, surface of the mould was coated the special coating to prevent a higher surface temperature on the mould as well as the impaction of liquid steel to the mould. The trial production verifies that the material rate can reach up to or more than 90% with 92.5% production sound rate in the squeezing casting. In addition, the castings with shrinkage porosity(hole) free and clean surface as well as sound microstructure can be successfully produced.