Process for preparing a tape guide cylinder
OwnerMasamitsu Tanaka, Koji Kondo +1inventors
InventorsMasamitsu Tanaka, Koji Kondo, Mamoru Usami
Life of this patent
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Abstract
A process for preparing a tape guide cylinder is disclosed, which includes the steps of deep-drawing a sheet metal material progressively to form an elongated cylinder with a bottom, subjecting the resulting cylinder to flange-machining to form a flange at its open end, thereafter removing the bottom of the cylinder, subsequently trimming the flange from the cylinder, and finally subjecting the resulting cylinder at either of its ends to a beat-machining for finishing the shape of the elongated cylinder. The tape guide cylinder thus prepared may further be subjected at its circumference, to a precision finish for providing an outer diameter of less than 6 mm but more than 5.2 mm.
Claims19
A process for preparing a tape guide cylinder, said process comprising the steps of:
- (a) deep-drawing a sheet of metal progressively thereby forming an elongated cylinder having an exterior surface and an inner diameter of at least 4.8 mm, said elongated cylinder comprising a bottom portion and a top portion, wherein said bottom portion includes a closed bottom end and said top portion comprises an open upper end;
- (b) stamping said elongated cylinder thereby forming a flange below said open end of said top portion of said elongated cylinder, said flange separating said top and bottom portions, both of said portions being cylindrical;
- (c) removing said bottom end of said bottom portion from said elongated cylinder;
- (d) trimming said flange from said elongated cylinder;
- and
- (e) finishing said elongated cylinder by machining the exterior cylindrical surface of said elongated cylinder so as to thereby form said elongated cylinder to have an outer diameter of greater than or equal to 5.2 mm and less than 6 mm.
A process for preparing a tape guide cylinder comprising the steps of:
- (a) deep-drawing a sheet of metal progressively thereby forming an elongated cylinder having an inner diameter of at least 4.8 mm, said elongated cylinder comprising a bottom portion and a top portion, wherein said bottom portion comprises a closed bottom end and said top portion comprises an open upper and;
- (b) stamping said elongated cylinder thereby forming a flange below said open end of said top portion of said elongated cylinder, wherein said flange is adapted to connect said top and bottom portions, said flange separating said top and bottom portions, both of said portions being cylindrical;
- (c) removing said bottom end of said bottom portion from said elongated cylinder;
- (d) trimming said flange from said elongated cylinder;
- (e) die-shaping the outer surfaces of said top portion and said bottom portion of said elongated cylinder;
- (f) grinding the external surface of said hollow and elongated cylinder;
- and
- (g) precision finishing an exterior surface of said ground hollow and elongated cylinder thereby obtaining an outer diameter for said elongated cylinder of greater than or equal to 5.2 mm and less than 6 mm.
Dependencies are inferred from the claim text.