Fuel filling port, stretching component
Handling of common and specific issues with fuel ports and stretching parts in production:
(1) When the cutting edge wears out, the tensile stress on the material increases, and the tendency for the stamped part to flip and twist increases. When flipping materials, the punching size will tend to decrease.
(2) The strong pressure on the material causes plastic deformation, which can lead to an increase in punching size. When reducing the pressure, the punching size will tend to be smaller.
(3) The shape of the end of the convex die blade. If a slope or arc is made at the end, due to the reduced cutting force, the punching part is less likely to flip or twist, resulting in a larger punching size. When the end of the punch is flat (without a slope or arc), the punching size will relatively decrease.
Inspection method for grinding oil stones on fuel ports and stretching parts:
1. First, wipe the surface of the outer covering with clean gauze, and then polish it with an oilstone (20 × 20 × 100mm or larger). For areas with arcs and difficult to reach areas, use relatively small oilstones (such as 8 × 100mm semi-circular oilstones).
2. The selection of oil stone particle size depends on the surface condition (such as roughness, galvanizing, etc.). Suggest using fine-grained oilstone. The direction of oilstone polishing is basically along the longitudinal direction, and it fits well with the surface of the stamped part. In some places, horizontal polishing can also be added.
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