Wire cut electrical discharge machining bed cutting wire's overspeed device tensioner

The utility model discloses a wire cut electrical discharge machining bed cutting wire's overspeed device tensioner, include: the fixed block, smooth rod, the lead screw, a handle, the slider, the apparatus further comprises a rotating shaft, the runner, fixing bolts, a smooth rod is welded respectively at both ends about the fixed block, through lead screw of bearing installation on the fixed block, handle of front end welding of lead screw, install a slider through threaded connection's mode on the lead screw, the both ends cover is on smooth rod about the slider, slider and smooth rod sliding connection, through pivot of bearing installation on the slider, a runner sets firmly in the pivot, install two fixing bolt through threaded connection's mode on the fixed block. The utility model is provided with advantages like simple structure and convenient usages.