Stamping technology: anti chip jumping

Jumping crumbs:

Due to high-speed punching, the punch eats into the material, resulting in a vacuum between the end of the punch and the material, so the material will be adsorbed and jumped out of the mold cavity after punching. This causes the material belt to be crushed during the travel, and Deformation. Its punching contour shape, gap, material characteristics and thickness, punching oil selection and dosage, SPM speed, blunt cutting edge, punching depth-----, etc. are the main factors that affect chip jumping. In-plant The most commonly used mold coating and air suction, and the change of blanking taper, air blowing method, punch end face change method, ejector rod design, lower mold grab method, blanking contour change method, lower mold edge Angle trimming method and depth of penetration,---and other adjustment methods are used in combination with practice.

Example of anti-jumping chip method:

a. Covering method

b. Inverted taper

c. Class hole u0026 grab hook.

d. Repair R arc

e. Unloading contour to change contour