Disclosed is a friction welding machine, including a machine bed, a main shaft system, a power system, a movable sliding table mechanism, and an upsetting oil cylinder; specially, the main shaft system is fixedly arranged on the machine bed and is used for mounting a main shaft workpiece; the power system is fixedly arranged on the machine bed and in transmission connection with a main shaft of the main shaft system, the movable sliding table mechanism includes a tailstock assembly used for mounting a tailstock workpiece, an axle center adjusting device is fixedl arranged on the movable sliding table mechanism and can drive the tailstock assembly to move and lock the position of the tailstock assembly; the upsetting oil cylinder is fixedly arranged on the machine bed and can drive the movable sliding table mechanism to be close to or far away from the main ......

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