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RAL-GZ 615
DIN EN ISO 24041
Certification:
DIN EN ISO 9001:2008
Environmental Certification:
DIN EN ISO 14001:2009
Special holes
(DIN 24 041)
The following pictures show a large variety of special holes. Specific technical applications require many different perforations (including stampings) and also a more decorative design can thus be achieved.
Examples of special designs: indented oblong holes, various combinations of different shapes such as keyholes with round holes, square holes with round holes, round holes of different diameters, rasp-type, flap-type, louver-type perforations, round holes with tapered necks, stampings and slotted bridge perforations.
slotted bridge perforation
scheme of a slotted bridge perforation
triangular holes
indented oblong holes
flap-type perforation
rasp-type perforations
louver-type perforation
indented round holes
stampings
stampings
combined bridge and round holes (patented)
Technical Informations
Standards and sizes
Standards
Length and Width
Material Thickness
Squareness of cut plates
Parallelism
Flatness
Edge Bows
Wavy Edges
Blank Side and End Margins
Blank areas
Conical section of hole
Punching Burr and Shearing Burr
Missing holes / Punch Breakage
Beginning and end of perforated area
Cleanliness of the surface – Degreasing – Permissible surface
Surface finish
Hole Shapes
Round holes
DIN 24 041
RV round holes, staggered rows
RD round holes, diagonally staggered rows
RG round holes, straight rows
Square holes
DIN 24 041
QV square holes, staggered rows
QD square holes, diagonally staggered rows
QG square holes, straight rows
Hexagonal holes
DIN 24 041
HV hexagonal holes, staggered rows
Oblong holes
DIN 24 041
LV Oblong holes, staggered rows
LG Oblong holes, straight rows
LGE Oblong holes, straight rows, square