Whisper sharpening

USES AND BENEFITS

The term Whisper sharpening of punches means the various possible punch geometries, made only on demand. Sharpening benefits are:

• noise reduction
• reduction of vibrations or recoil for all the machine components
• reduction of scrap pulling
• tonnage reduction
• easy extraction
• Less sheet metal deformation

Tools with special sharpening require a deeper penetration on the die, giving a greater loading to the punch holders springs.

The most commonly used sharpenings are the following:

DVS

for shearing tools and high thicknesses

DWP

for balanced loadings and high thicknesses

DWNT

for thin thicknesses and nibbling processes with big shapes

WNT

for thin thicknesses and nibbling processes with small shapes

WN

for high thicknesses and nibbling processes with fast machines

Find here below an illustrative table concerning tonnage reduction, considering DWP shear with standard depth.