The invention discloses a method for improving
flame cutting and blanking precision of a
steel tube arch rib shell section
base metal steel plate, which comprises the following specific blanking steps: step 1, selecting raw materials, determining the steps of the
steel tube arch rib shell section
base metal cutting and blanking method and corresponding
raw material production equipment, and carrying out trial operation on the production equipment; step 2,
lofting a steel plate, performing
numerical control programming on a full-automatic
numerical control flame cutting machine, compiling a running track of a cutting
nozzle in a computer, and debugging related parameters; thirdly, before formal cutting, the cutting
torch is made to run for one round in an idle mode according to
numerical control programming, and the cutting running track is simulated; fourthly, the full-automatic numerical control
flame cutting
machine begins to conduct formal cutting, and after cutting is finished, four points of the shell section
base metal steel plate are still not
cut; the blanking and cutting precision of the steel
pipe arch rib shell section base
metal steel plate is improved, it is ensured that the blanking precision and quality of the steel plate are within the controllable range, and a foundation is laid for a series of subsequent
machining and manufacturing of the steel
pipe arch rib with the high precision requirement.