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游梁式抽油机减速路大齿轮毛坯重1300kg,材质为OT700-2,加工后要求齿面硬度220～250HB。结构尺寸与传统的铸造工艺见图1。主要部位壁厚为90mm,属厚大断面球墨铸铁件。通过合理地选择与控制铸造工艺要素,实现了QT700-2大齿轮毛坯的无冒口铸造,铸态生产。
Beam pumping slowdown road gear blank weight 1300kg, made of OT700-2, after processing tooth surface hardness 220 ~ 250HB. Structure size and the traditional casting process shown in Figure 1. The main part of the wall thickness of 90mm, is a thick section ductile iron parts. By reasonably selecting and controlling the casting process elements, the QT700-2 gear blank has been realized without riser casting and as-cast production.