Patent ID: 7918008

Claim:
A method of manufacturing a column of a machine tool, comprising steps of: preparing a column front member provided with a plurality of slits on a face and a plurality of projection portions on ends of the column front member by laser cutting a sheet metal; preparing a column rear member provided with a plurality of slits on a face and a plurality of projection portions on ends of the column rear member by laser cutting a sheet metal; preparing two side covers provided with a plurality of slits on faces of the two side covers and a plurality of recess portions on outer surfaces of the two side covers by laser cutting a sheet metal; preparing ribs provided with a plurality of projection portions by laser cutting a sheet metal; and assembling the column front member and the column rear member by inserting the plurality of projection portions of the ribs into the plurality of slits of the column front member and the column rear member, and by inserting and fixing the plurality of projection portions of the ends of the column front member and the column rear member into the plurality of slits of the side covers.