steel space frame blanking process
A. The construction personnel should carefully check the construction drawings, and if any problems are found, they should immediately raise them to the technical person in charge to avoid problems.
solve the problem in time.
B. The size of important nodes must be staked out or calculated.
C. The measuring tools used for stakeout, blanking and component assembly and inspection must be qualified measuring tools verified by the measurement and testing department.
D. The cutting line for blanking must be correct and clear, with allowances for welding shrinkage and cutting edge processing.
E. The cutting of parts should be cut by shearing machine, flame cutting machine, combined punching and shearing machine, bow sawing machine, etc., depending on the specific situation, and manual cutting should be avoided as much as possible. See the table for the allowable deviation of various cutting methods and cutting surfaces
F. Local nicks with a depth of more than 1mm on the cutting surface, cuts with a depth of more than 2mm, and residual
The remaining burrs should be repaired and polished.
|Cutting method and allowable deviation of cutting surface|
|Automatic and semi-automatic cutting||±1.5mm|
|The non-perpendicular slope of the cutting surface is||≤1.5mm|
|Cutting bevel angle||±3°|
|Cutting edge dullness||±2.0mm|
G. The welding groove form of the component must be selected according to the welding symbol marked on the drawing and the groove form and size.