Pneumatic plate shearing machine

The utility model relates to a pneumatic plate shearing machine, including the frame, set up at the supporting seat of frame bottom, set up at the blade unit of frame front end and be used for controlling the drive unit of blade unit motion, the blade unit includes blade and bottom knife unit, it connects to go up blade and drive unit, the bottom knife unit is portable to be fixed in the frame, when the blade pushes down in the drive unit drive, leave the space between the cutting edge of last blade and the cutting edge of bottom knife unit, and the size in this space is adjusted through moving the bottom knife unit. Compared with the prior art, the utility model discloses the adjustable gap length of going up between blade and the bottom knife to be applicable to the sheet material of different thickness, strong adaptability, and the shearing of orthodrome board on the basis of satisfying the intensity of lathe own, can be realized to the great degree of depth aditus laryngis of thisplate shearing machine de