我厂铸造车间3t 冲天炉单轨加料原限位装置如图1所示。由于料桶的上升惯性无法避免,所以极易损坏限位开关,三两天就需更换。为此,对限位装置进行了改造(如图2)。利用极限位置的原理,将压触点改为圆弧面,其 I plant casting workshop 3t cupola monorail feeding original limit device shown in Figure 1. Due to the rising inertia of the bucket can not be avoided, so easy to damage the limit switch, three days to be replaced. To this end, the limit device has been modified (Figure 2). The use of the principle of limit position, the pressure contact to arc surface, its