Title:
METHOD OF SINKING COUNTER SINK IN PLATE BLANK
Document Type and Number:
Japanese Patent JPS52132490
Kind Code:
A
Abstract:
Counter-sunk seats are formed around preliminary holes in a work piece. Material of the work piece is thereby forced into the preliminary holes, and extruded through the preliminary holes, while other material of the work piece is extruded into a slit, previously formed in the work piece adjacent the preliminary holes, preventing undesirable swelling of the work piece.
More Like This:
| JP2012115882 | EMBOSSED THIN PLATE MATERIAL, AND SEAT SLIDE RAIL FOR VEHICLE |
| JP5352155 | Manufacturing method of hollow tube |
| WO/2016/032347 | A DIE OR PUNCH FOR A PRESS TOOL |
Inventors:
NAKANISHI YOSHITAKA
Application Number:
JP4851676A
Publication Date:
November 07, 1977
Filing Date:
April 30, 1976
Export Citation:
Assignee:
NAKANISHI YOSHITAKA
International Classes:
B21D22/02; B21D22/04; B21D28/24; B21D28/26; B26F1/00; B21D28/34; (IPC1-7): B21D28/02; B21D28/34; B26F1/02; B26F1/44
Domestic Patent References:
| JP38005958A | ||||
| JPS5041760A | 1975-04-16 | |||
| JP36008527A |