Stepping beam structure for automatic production of crankshaft forgings

The invention discloses a stepping beam structure for automatic production of crankshaft forgings. The stepping beam structure comprises a front beam, a rear beam, a welding block, a connecting block, a clamp seat, a protection box, an upper limiting block, a lower limiting block, an inner shaft sleeve, an outer shaft sleeve, a pin shaft, a cushion block, a spring and a clamp. The front beam is used as a positioning end, and the clamp seat is directly fixed on the front beam through a screw; the inner sleeve and the outer shaft sleeve are fixed to the rear beam through screws, a spring is arranged in the pin shaft, and the clamp seat and the pin shaft are connected together and can stretch out and draw back in the inner shaft sleeve and the outer shaft sleeve. The front end of the stepping beam has a precise blank positioning effect, and meanwhile, the rear end of the stepping beam has a certain expansion and contraction amount, so that equipment alarm caused by blank length deviation when the stepping beam c