The invention discloses an automobile rear wall outer plate
punching device which comprises a
workbench and a rack, a supporting seat is arranged at the top end of the
workbench, a
punching piece is movably arranged on the rack in the longitudinal direction, and the
punching piece is located above the supporting seat; a reserved hole site is formed in the middle of the supporting seat in a penetrating mode, an inner ring cavity is formed in the supporting seat, and a plurality of adsorption holes communicating with the inner ring cavity are formed in the two sides of the top end of the supporting seat. A
temporary storage groove is formed in the position, corresponding to the reserved hole position, of the top end of the
workbench, a connecting channel is formed in the workbench, and the connecting channel is connected with the output end of an arranged negative pressure generator. Through the arrangement of the adsorption path, the
scrap removing path, the adjusting
assembly and other structures, waste in the
temporary storage tank is sucked and transferred through the same negative pressure source. According to the design, an additional
electric control valve or independent
scrap removing equipment is not needed, automatic switching of the adsorption function and the
scrap removing function can be completed through mechanical linkage, waste accumulation is effectively avoided, and the
machining cleanliness and the working efficiency are improved.