Squeezing enlarging enlarged bottom pile support disc forming machine

The utility model relates to a squeezing enlarging enlarged bottom pile support disc forming machine which belongs to an arm replaceable squeezing enlarging perfusion enlarged bottom pile support disc forming device. The utility model resolves the technical difficulties in the prior art such as the big diameter of machine rack, difficult repairing, small extruding force and limited versatility of the existing support disc forming device. The technical proposal of the utility model is that the forming machine comprises an oil cylinder; a machine rack which is composed of an upper support seat, two vertical plates and a lower support seat; a pair of replaceable support arms that is composed of an upper support arm, a link pin and a lower support arm; and an upper link pin, an lower link pin and a bolt; Moreover, the utility model also comprises an upper jointing block and a lower jointing block. The oil cylinder is jointed with the upper support seat, and the upper end of the upper jointing block is jointed with a piston shaft. The lower part of the upper jointing block is jointed via the link pin with the upper end of the upper support arm. The two ends of the upper link pin are arranged in the guide slots of the vertical plates. The lower end of the lower jointing block is jointed with the lower support seat, and the upper part of the lower jointing block is jointed with the lower end of the lower support arm by dint of the lower link pin.