Wire electrical discharge machined rupture disk and method

A method of constructing a rupture disk, comprising the steps of:

• a) providing a disk blank having a central axis, a peripheral flange and a concave convex portion that is surrounded by the peripheral flange;
• b) rotating the disk blank and a cutting wire relative to each other;
• c) during said rotating, scoring the surface of the concave convex portion with the wire to form a scored recess, wherein the wire is an electrical discharging machine wire that contacts the disk concave convex portion while scoring said surface, said wire having a diameter;
• d) wherein the wire is advanced toward the disk central axis as the score is formed in steps “b” and “c”;
• e) wherein the wire is spaced away from the peripheral flange in step “d”;
• and
• f) the scored recess having a maximum width that is greater than the wire diameter.

A method of constructing a rupture disk, comprising the steps of:

• a) providing a disk blank having a peripheral flange and a concave convex portion having concave and convex surfaces and surrounded by the peripheral flange;
• b) rotating the disk blank upon a turntable, wherein the turntable contacts the concave surface of the disk concave convex portion;
• c) during the rotating of step “b”, scoring the surface of the concave convex portion with a wire of a wire electrical discharging machine, said wire having an outer surface with a shaped surface;
• and
• d) wherein the score includes a curved part that has the same curvature as the curvature of at least a part of the outer surface of the wire.

A method of constructing a rupture disk, comprising the steps of:

• a) providing a disk blank having a peripheral flange and a concave convex portion that is surrounded by the peripheral flange, said concave convex portion having concave and convex surfaces and a central axis;
• b) rotating the disk blank upon a turntable and about said central axis, wherein the turntable contacts the disk concave surface;
• c) during the rotating of step “b”, scoring the convex surface with a wire of a wire electrical discharging machine;
• d) wherein the wire has a circular cross section and the score has a cross section that is formed by the wire in step “c” and which score has a first part that corresponds in shape to the cross section of the wire and a second part generated by movement of the wire toward the disk central axis.