ATA502173A - Process to perforate sheet metal panel by initial presentation of cutter to one side followed by action of press in reverse direction
- Google Patents
Process to perforate sheet metal panel by initial presentation of cutter to one side followed by action of press in reverse direction
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pirna Guss & FarbenglaswerkefiledCriticalPirna Guss & Farbenglaswerke
Publication of ATA502173ApublicationCriticalpatent/ATA502173A/en
Application grantedgrantedCritical
Publication of AT346520BpublicationCriticalpatent/AT346520B/en
Perforating, Stamping-Out Or Severing By Means Other Than Cutting
(AREA)
Abstract
In a process to perforate a sheet metal panel (1) with a matrix (2) and a die (3), the margin around the intended hole is stretched to form a curved profile prior to operation of the die. After operation of the die, the sheet metal panel is presented to the reverse side of the matrix where the curvature is removed by a press.
AT502173A1972-06-221973-06-07
DEVICE FOR SEPARATING A PROFILE GLASS RIBBON, IN PARTICULAR WITH A U-LIKE CROSS SECTION
AT346520B
(en)