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Concrete railway sleeper broken screw shaft removal - using activating bolt butt welded to broken surface and subsequently reusable
Concrete railway sleeper broken screw shaft removal - using activating bolt butt welded to broken surface and subsequently reusable
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机译:拆除混凝土轨枕的螺钉轴断裂-使用焊接在断裂表面上的对接螺栓,然后可重复使用
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摘要
The process for removing screw shafts which have broken off in a hole, esp. in a screw dowel (2), is applicable to the renovation of concrete railway sleepers (1). It involves connecting the screw shaft to an activating bolt for drawing it out. The activating bolt is butt-welded to the broken face of the screw shaft. After unscrewing the shaft, it can be cut off just above the welding point, to be used again. An electric welding device can be used, with its electrode forming the activating bo or the bolt can be a metal tube with a holes insulating plug at the top for insertion of an electric welder's electrode.
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