Title:
【発明の名称】シ-ト材料に開孔を形成する方法および装置
Document Type and Number:
Japanese Patent JPS5819369
Kind Code:
B2
Abstract:
A method and an apparatus for producing openings in sheet metal material being provided in band form as well as a perforated sheet material produced by said method. The method comprises providing notches in the sheet material and stretching partial areas of the notched sheet material by a thickness-reducing processing step, whereby the notches which lie between the stretched partial areas of the notched sheet material are enlarged to form openings. The apparatus for producing openings in sheet metal material comprises roller means for producing notches in the sheet material and roller means for stretching partial areas of the notched sheet material by thickness reduction. The resulting perforated sheet metal material combines the advantages of punched sheet metal, i.e., mechanical stability, and expanded metal mesh, i.e., no loss of material during production of the openings in the sheet material.
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Inventors:
HANSU HIRUESUHAIMU
Application Number:
JP13224276A
Publication Date:
April 18, 1983
Filing Date:
November 01, 1976
Export Citation:
Assignee:
HILLESHEIM HANS
International Classes:
H01M4/74; B21D28/12; B21D28/26; B21D31/04; B26F1/38; B21D31/00; (IPC1-7): B21D31/04; B21D28/12
Attorney, Agent or Firm:
Fukami Hisaro
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