Title:
FRICTION JOINING STRUCTURE OF GALVANIZED STEEL MATERIAL
Document Type and Number:
Japanese Patent JPS5684186
Kind Code:
A
Abstract:
PURPOSE: To increase a finishing coefficients higher than those of blasted surface and improve joints strength by point-hammering at least one surface in roughing the galvanized surfaces mutually and frictinally joining these.
CONSTITUTION: The surface B of one of the galvanized steel materials to be frictionally joined is tapped with the pointed ends of tapping bars and is thereby dented. The other surface A to be joined with this is similarly tapped or blasted. Here, the tapped surfaces are provided with dents of 50W100pcs/cm2 by steel-made tapping bars with acute-angled ends of Hv=350W450 Vickers hardness and 1W4mm outside diameters and these are joined by means of high tensile bolts.
Inventors:
MATSUMOTO MASAMI
Application Number:
JP16206579A
Publication Date:
July 09, 1981
Filing Date:
December 13, 1979
Export Citation:
Assignee:
TOMOEGUMI IRON WORKS
International Classes:
E04B1/38; B23K20/12; F16B5/02; (IPC1-7): B23K20/12
Domestic Patent References:
| JPS492734U | 1974-01-11 |