Automatic knocking-over machine

The invention relates to the field of lithium batteries, in particular to an automatic knocking-over machine which comprises a frame body, a feeding module, a preheating module, an ejection module and a knocking-over module, the frame body is provided with a plurality of rotating stations, and each rotating station is provided with a corresponding material disc used for receiving a battery cap body; the feeding module comprises an input belt used for conveying battery caps and a first suction cup used for conveying the battery caps on the input belt to the material disc, the preheating module comprises at least two sets of heating devices, and the heating temperatures of the heating devices on rubber rings of the battery caps in the material disc are sequentially increased from upstream to downstream. The ejection module comprises a pressing tool for pressing the rubber ring on the material disc and an ejection core for ejecting the assembled semi-finished product out of the rubber ring; the ring stripping mo