The Cleveland Punch and Die tip for the day involves the punch stripper. Tooling life can be influenced by the stripping mechanism which allows the punching machine to withdraw or "strip" the punch from the material after the hole has been punched. If the stripper is not used correctly, punch life may be reduced. If the bottom of the stripper is not parallel with the material, or if it is cocked or uneven, the material will act as a wedge against the punch. As the machine tries to pull the punch from the material, the lateral force wedging the punch into the material will cause the punch face to pull or flake off. In extreme cases, the punch may even be pulled apart.
Some stripping mechanisms advance with the punch and actually make contact with the material, while others are manually adjusted for the specific punching application. Manual strippers should be adjusted for minimal free play between the bottom of the stripping mechanism and the top of the material. If your stripping mechanisms begin to wear, call your Cleveland Punch & Die representative to have them replaced. We can also supply a urethane punch stripper which slips directly over the punch and aids in stripping the material off of the punch in applications where a bulky ironworker stripper is not applicable.
No comments:
Post a Comment