Bidirectional double-punch can body stretcher

The utility model relates to a bidirectional double-punch can body stretcher, which is characterized in that in structural design, the design scheme that two sets of identical plunger driving mechanisms share one crankshaft is adopted, so that a pop-top can body stretcher with a bidirectional double-punch structure is formed. The scheme has the characteristics that the two sets of plunger driving mechanisms share one crankshaft and are arranged in a symmetrical layout manner, so that the inertia force of a pendulum bar, a sliding block, a plunger and other components during moving and counterforce generated in the can body forming process can be balanced, thereby significantly reducing the load of a crankshaft supporting bearing, reducing design and machining requirements of the bearing and prolonging the service life. In addition, one device can realize the productive capacity of two traditional can body stretchers, and saves manufacturing cost and reduces energy consumption as compared with the two traditional can body stretchers.