油底壳压铸模斜抽芯设计

Oblique Core-Pulling Design of Die-Casting Die for the Oil Sump

针对抽出方向与分型面不平行,难以设计楔紧块的油底壳压铸模斜抽芯,通过计算斜抽芯成型投影面积,70MPa最大铸造压力条件下的压铸反力、抽芯力,选用了直径为Ф125mm的抽芯油缸,其插芯力比压铸反力大1/3以上。油缸油路设置单向阀,设计了利用油缸油压力与单向阀闭锁油压从而达到楔紧要求的斜抽芯结构。实际生产表明,在14MPa压铸机系统油压力下,内抽芯无后退现象。抽芯结构紧凑、简单可靠,保证了连续稳定生产。

Since the extraction direction is not parallel to the parting surface,it is difficult to design the angled core-pulling of the die-casting mould with oil pan for wedge block.Through calculating the projection area out of the angled core-pulling formation,the die-casting reaction force and core-pulling force under the maximum casting pressure of 70MPa,the core-pulling cylinder with a diameter of Ф125mm is selected,the core-pulling force of which is over 1/3 greater than the die-casting reaction force.A one-way valve is installed in the oil circuit of the oil cylinder,and the oil pressure of the oil cylinder and the locked oil pressure of the one-way valve are applied to produce the angled core-pulling structure meeting the wedge-caulking requirements.The actual production shows that no retrogression appears in the inner core-pulling under the oil pressure of 14MPa of the die-casting machine system.The core-pulling structure is compact,simple and reliable,which ensures sustainable and stable production.