Hydro -cylinder special welding machine

The utility model discloses a hydro -cylinder special welding machine, including clamping device, welding machine, welder and stack, preheating device, still include PLC, clamping device includes chassis, first and second supports, the first and second removal seats, the chassis top surface is equipped with the fixed slot, and first and second remove the seat establishes respectively on the fixedslot, and two remove the seat drives from top to bottom through lifting the cylinder, being equipped with corresponding a pair of support respectively on the first and second removal seats and connecing the slider, hold in the palm to connect the top surface of slider to be the inclined plane, the activity is inlayed and is equipped with the ball on the inclined plane, both ends on the chassis topsurface are established respectively to first and second supports, be connected with cylinder bottom face crimping piece through die clamping cylinder on first support, be connected with jar top surface crimping piece through