A column tube single face square opening punch forming
processing method includes that a special die is adopted to process a column tube single face square opening on a 40T common punch device, the special die is composed of special components of an inner R type
cutting edge terrace die, a replaceable wedge type die, a wedge type discharging insert and the like. The
processing method includes concrete steps that: (1) punch
stroke is adjusted, and bottom dead center is at the position exactly
cutting off the wall of the square opening; (2) the orifice blade width of the replaceable wedge type die is 3-4mm, and main body is finished into square cone with small orifice and large cavity; (3) inner R of the
cutting edge terrace die is consistent with outer R of the processed column tube; (4) the oblique angles the insert of the replaceable wedge type die and the wedge type discharging insert are all 4 degrees; (5) part
processing, namely inserting part into the die, wedging the die, wedgingthe discharging insert and
die cutting, is carried out. The column tube single face square opening processed by the invention is uniform and consistent in hole pattern and R,
prism is burr-free, roughness reaches Ra1.6, appearance is beautiful, processing efficiency is high, processing precision meets the requirement that tolerance is less than 0.1mm, and the service life of easily damaged die can reach 20000-30000 pieces.
Pipe stress is uniform in terrace
die cutting, and orifice deformation is small; and the die not only can strengthen tube pillar inner hole but also can be fast dismounted,and need of rapid production is satisfied.