China metal stamping parts encounter in the day-to-day production, punching is too large or too small (size may exceed the specification requirements) as well as with the punch size difference between the larger situation, in addition to considering forming convex, die design, machiningthe precision blanking clearance and other factors, you should also be considered from the following aspects to resolve.
China metal stamping parts encounter in the day-to-day production, punching is too large or too small (size may exceed the specification requirements) as well as with the punch size difference between the larger situation, in addition to considering forming convex, die design, machining the precision blanking clearance and other factors, you should also be considered from the following aspects to resolve.
(1). The punching edge wear, the material suffered tensile stress increases, metal stamping parts turn materials distort the trend of increase. Produce material tumbling, punching size will tend to be small.
(2) of the extreme pressure of the material, so that the material is plastically deformed, to cause punching increasingly large in size. Alleviate extreme pressure, punching size will tend to be small.
(3) the shape of the end portion of the punch blade. End repair a slant or curved, blanking force slowing turn not easy to produce material, twisted metal stamping parts, punching size will be increasingly large. The punch ends for the plane (no slant or curved), punching size relative will tend to be small.
Specific production practices for specific analysis should focus on specific issues, and to find a solution to the problem.