Downpipe hollow cutting device

The utility model discloses a downcast pipe cutting device belonging to the manufacturing field of metallic cold bending sheet processing device. The cutting device is mainly consisting of a pressing mechanism(1) and a cutter mechanism(2). Wherein, the pressing mechanism consists of an inlaid clutch(6) arranged on a mounting board, a pressing module(5) with a restoring spring(4), a guiding block(10), an oil cylinder mounting holder(9) and a pressing oil cylinder joint(8) fixed onto the inlaid clutch(6) through a pin(7). The cutter mechanism consists of a guiding rail(20) arranged on the mounting holder(12), the flexible knife pedestal(13) with an flexible knife(19), the fixed knife mounting board(18) with a fixed knife(17), a cutting oil cylinder joint(15), a bracket(16) and a plug pin(14). The utility model has the advantages of reasonable design, compactly integrated structure, simple and reliable action, convenient processing and maintenance, long application lifetime, effectively improved work efficiency and cutting quality, and thus is suitable to be used for the cutting and processing operations after all types of downcast pipes are formed.