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Angle steel: weight per meter = 0.00785 * (side width + side width - side thickness) * side thickness Round steel: weight per meter = 0.00617 * diameter * diameter (rebar and round steel are the same) Flat steel: weight per meter = 0.00785 * thickness * side width Pipe: weight per meter = 0.02466 * wall thickness * (outer diameter - wall thickness) Plate: weight per meter = 7.85 * thickness * width Brass tube: weight per meter = 0.02670 * wall thickness * (outer diameter - wall thickness) Copper pipe: weight per meter = 0.02796 * wall thickness…

1. Allowable burr height of punching parts (1) limit value of burr of blanking parts It is not allowed that the burr of blanking parts exceeds a certain height. The limit value of burr height of stamping parts (mm) is shown in the table below.  (2) marking requirements for burrs in design drawings *Burr direction: burr side. *Parts requiring burring: coin or coin continue. Generally, do not press all the burrs on the fracture of the whole structural member, which will increase the cost. Try to use it in the following situations: the fracture exposed to the outside; Sharp edges…