Coil expanding machine

The utility model relates to the technical field of coil expansion, and discloses a coil expansion machine which comprises a supporting body, one end of the inner wall of the supporting body is fixedly connected with two miniature hydraulic telescopic rods, the other miniature hydraulic telescopic rod is fixedly connected to the other end of the supporting body, and the other miniature hydraulic telescopic rod is fixedly connected to the other end of the supporting body. And the micro hydraulic telescopic rod is arranged, so that the coil can be expanded conveniently, force applied to the two ends is the same, and scales are arranged on the outer surface of the micro hydraulic telescopic rod. The coil expanding device has the following advantages and effects that through the arrangement of the micro hydraulic telescopic rod, the micro oil pump and the handle, a worker puts a coil into the expanding groove in the expanding ball, tightly holds the handle, presses the switch and starts the micro oil pump, so tha