Fixture for assembling and expanding electric machine rotor bar

The title of the utility model is a fixture for assembling and expanding an electric machine rotor bar, and the utility model relates to a fixture for assembling and expanding a traction electric machine copper rotor bar. By adopting the utility model, problems described in the following can be solved, length of the rotor bar stretching out of two ends of a rotor core are determined through marking lines when a present electric machine copper rotor bar is assembled and expanded, operation is complex, the rotor bar cannot be accurately positioned, lengths, stretching out of two ends of a rotor core, of the rotor bar are different, two ends of the rotor bar are not fixed when the rotor bar is expanded, and the rotor bar is easy to slip off from a rotor core groove when the expanding force is over large or the direction is inclined. A ring non-driving end pressure plate are connected to a driving end pressure plate through four screws, the inner circle of the non-driving end pressure plate is provided with a ring stage, and four bolts are uniformly connected to the periphery of the ring stage. By adopting the fixture for assembling and expanding the electric machine rotor bar, workers' labor intensity is reduced, positioning precision of the rotor bar and the expanding effect are improved, the size is small, the weight is light, the floor space is small, so the fixture is suitable for assembling and expanding a batch of copper rotor bars at the same time.