The invention relates to a method for
flanging a slant notch of a cylindrical shell, comprising the following steps: moulding and
punching are carried out on 8 parts along the periphery of the cylindrical shell parts, 8 slant
flanging notches are correspondingly arranged along the periphery of the cylindrical shell; first, sheet
metal is produced into a sector and then rolled into a cone and then welded and corrected; afterwards,
laser is adopted to
cut the cone into kerves of the notches, the method of mould
stamping is adopted to stamp all 8 notches in a
stroke; a wedge block is adopted to transform vertical
ram pressure of a
punching machine into horizontal
ram pressure which is exerted on 8 slotting parts, so that both internal mould and external mould can move; an
active structure can be adopted to a female groove, when
stamping is carried out, the outside female groove is first put in place, and then the inside male groove moves and is flanged.The invention has the advantages that high-accuracy part
stamping is realized by using an ordinary pressure
machine.The mechanism features good implementation effect, satisfies high-accuracy engine part
processing requirements and enjoys good TOP.In addition, the
processing efficiency is high; when specialized equipment is not used, the method of the invention is a reliable and economical method for
processing similar parts.