野外地质勘探队修配车间经常要修理加工岩心管和套管丝扣。一般加工岩心管、套管（直径89—146毫米）需要特制套管车床，但目前野外队不能全都配备这种专用车床。为了解决这个问题，我们在外单位的经验启示下，采取了领导、工人、技术人员三结合方法，经过半个月的努力，试制了一件附属胎具——胀胎，用它可在普通车床上加工岩心管。这种胀胎结构甚简单，加工制造也很容易，它由顶丝杆和胀盘组成（如下图）。不同 Field geology exploration team repair shop often repair and processing core pipe and casing threaded. General processing of the core pipe, casing (diameter 89-146 mm) need special casing lathe, but the field team can not be equipped with this special lathe. In order to solve this problem, under the inspiration of outside units, we adopted a combination of leadership, workers and technicians. After half a month’s hard work, we tried out an accessory tire-inflation tire, which can be used in ordinary lathes On the processing of core pipe. This inflated tire structure is very simple, easy manufacturing, it consists of top screw rod and expansion disc (Figure below). different