Method of producing connector fittings for pipes
AssigneeKabushiki Kaisha Taishin Seisakusho
InventorYoshio Sasahara
Life of this patent
Estimating the term…
Abstract
A method of producing connector fittings for pipes by using press machine comprising the steps of forming a semicircular recess in the upper surface of each of a pair of blanks placed in parallel and contact with each other as a first step, and forming a semicircular inner recess for holding flange of a pipe simultaneously with forming a pair of parts in which bolt holes are formed.
Claims3
A method of producing connector fittings for pipes, comprising attaching a first upper die to an upper die set and a first lower die to a lower die set, respectively, said first upper die having a hole formed in the central part thereof in which a pressure die can be inserted, said first lower die having a cavity formed in the upper surface thereof, placing a pair of blanks in the cavity of said first lower die, pressing said blanks with said pressure die so as to form a semicircular recess in the upper surface of said blanks, attaching a second upper die to said upper die set and a second lower die to said lower die set, respectively, said second upper die having a cavity in its lower surface to receive a second pressure die, said second lower die having a cavity formed in the upper surface thereof, placing said pair of blanks in the cavity of said second lower die, and pressing said blanks with said second pressure die thereby forming a pair of connector fittings, each having a semicircular inner recess for holding flange of a pipe and a pair of surface in which bolt holes are formed.
Dependencies are inferred from the claim text.