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1. (WO2013159908) COVER METAL-SHEET FOR THE USE IN MEDIUM AND HIGH VOLTAGE SWITCHGEARS, AND METHOD OF MAKING THE SAME

Pub. No.:    WO/2013/159908    International Application No.:    PCT/EP2013/001213
Publication Date: Fri Nov 01 00:59:59 CET 2013 International Filing Date: Wed Apr 24 01:59:59 CEST 2013
IPC: H02B 1/01
F16B 5/02
F16B 39/24
Applicants: ABB TECHNOLOGY AG
Inventors: KLASKA, Arne
GENTSCH, Dietmar
FAN, Zhenhua
Title: COVER METAL-SHEET FOR THE USE IN MEDIUM AND HIGH VOLTAGE SWITCHGEARS, AND METHOD OF MAKING THE SAME
Abstract:
The invention relates to a cover metal-sheet for the use in medium and high voltage switchgears, by which the metal sheet is applied with openings for inserting srewed connections, and a method of making the same, according to the preamble of claim 1 and 5. In order to integrate shaped spring elements with defined force/deformation characteristics in sheet parts in order to reduce needed parts, and save time of manufacturing, the openings are deformed in the direction antipodal and/or in the same direction to the screwing direction and that the area around the opening is treated by hardening and tempering in that way, that the implemented deformed and hardened area around the opening is an integrated spring element.