在制造高度较大的大中型铸件时,一般都是采用抽芯模造型,其外模组合块与中间抽芯的连接,过去常使用金属燕尾销,或用厚度为20～30毫米的木板条制作的导向销。使用燕尾销在组合外模时,安装在外模底部的燕尾销观察比较困难,同时用天车起吊中间抽芯时,由于抽芯模的重心难以控制,经常产生组合块连在中间抽芯上的现象。我们在YB32-500吨油压机的上、中、下三梁 In the manufacture of large and medium-sized high-level castings, the general is the use of core-pulling model, the outer module combination block and the middle of the core-pulling connection, the past often used metal swallowtail pin, or with a thickness of 20-30 mm wood strips Guide pin made. When the swallowtail pin is used to assemble the outer die, the swallowtail pins installed at the bottom of the outer die are more difficult to observe. In the meantime, when lifting the middle core with the crane, it is often difficult to control the center of gravity of the core pulling module. phenomenon. We are in the YB32-500 tons hydraulic machine on the middle and lower three beams