초록 ▼

A cylindrical workpiece (20) is mounted onto and connected to a mandrel (14) that is itself mounted for rotation about a vertical axis (12). A first end portion of the workpiece (20) is housed within the mandrel (14). A second end portion projects axially outwardly beyond a radial forming surface (6

A cylindrical workpiece (20) is mounted onto and connected to a mandrel (14) that is itself mounted for rotation about a vertical axis (12). A first end portion of the workpiece (20) is housed within the mandrel (14). A second end portion projects axially outwardly beyond a radial forming surface (60) on the mandrel (14). A first forming roller (30) is mounted on a swing post (52) that is positioned by an adjustable length strut (56). The strut (56) is elongated to swing the post (52) downwardly and place the roller (30) inside the second end portion of the workpiece (20). Then, a lead screw (28) is used for pulling on a base (50) that supports the post (52). This pulls a convex face portion (32) of the roller (30) against the inside of the second end portion of the workpiece (20). Lead screw operation moves the roller (30), causing it to stretch the second end portion of the workpiece (20) and move it up onto and then move it radially outwardly along the forming surface (60). The movement of the roller (30) can be stopped before the roller (30) passes the outer diameter of the forming surface (60). Then, a second forming roller end cam can be used to bend the outer end part of the workpiece radially inwardly and then flat against an adjoining portion of the workpiece (20) that is in contact with the forming surface (60). Or, the roller (30) can be moved radially outwardly until it moves past the outer diameter of the forming surface (60).

대표청구항 ▼

A cylindrical workpiece (20) is mounted onto and connected to a mandrel (14) that is itself mounted for rotation about a vertical axis (12). A first end portion of the workpiece (20) is housed within the mandrel (14). A second end portion projects axially outwardly beyond a radial forming surface (6

A cylindrical workpiece (20) is mounted onto and connected to a mandrel (14) that is itself mounted for rotation about a vertical axis (12). A first end portion of the workpiece (20) is housed within the mandrel (14). A second end portion projects axially outwardly beyond a radial forming surface (60) on the mandrel (14). A first forming roller (30) is mounted on a swing post (52) that is positioned by an adjustable length strut (56). The strut (56) is elongated to swing the post (52) downwardly and place the roller (30) inside the second end portion of the workpiece (20). Then, a lead screw (28) is used for pulling on a base (50) that supports the post (52). This pulls a convex face portion (32) of the roller (30) against the inside of the second end portion of the workpiece (20). Lead screw operation moves the roller (30), causing it to stretch the second end portion of the workpiece (20) and move it up onto and then move it radially outwardly along the forming surface (60). The movement of the roller (30) can be stopped before the roller (30) passes the outer diameter of the forming surface (60). Then, a second forming roller end cam can be used to bend the outer end part of the workpiece radially inwardly and then flat against an adjoining portion of the workpiece (20) that is in contact with the forming surface (60). Or, the roller (30) can be moved radially outwardly until it moves past the outer diameter of the forming surface (60). APPLICATION The application is based upon, claims the benefit of priority of, and incorporates by reference the contents of prior Japanese Patent Application No. 2001-281937 filed on Sep. 17, 2001. mited. 8. The metering valve according to claim 7, further comprising a mechanical stop mounted on said valve member a predetermined distance away from said bushing when said shoulder and said first end edge of said bushing are engaged and arranged to selectively abut said bushing to limit the motion of said valve member relative to said bushing, whereby the extent of movement of said shoulder away from engagement with said first end edge of said bushing is limited. 9. The metering valve according to claim 7, further comprising a resilient bias mechanism to bias said valve member towards a position in which said shoulder and said first end edge of said bushing are engaged. 10. The metering valve according to claim 9, wherein said valve member is responsive a fluid pressure applied thereto, said bias mechanism resisting the effect of the fluid pressure applied thereto up to a threshold fluid pressure, after which the fluid pressure applied thereto is sufficient to move said valve member including said shoulder out of engagement with said first end edge of said bushing. 11. The metering valve according to claim 10, wherein the extent of movement of said shoulder away from said first end edge of said bushing it proportional to the fluid pressure above said threshold fluid pressure such that said annular flow opening correspondingly increases in area up to the limit of movement of said shoulder away from said first end edge of said bushing, after which said annular flew opening has a constant area independent of increasing fluid pressure. 12. The metering valve according to claim 11, further comprising a mechanical stop mounted on said valve member a predetermined distance away from said bushing when said shoulder and said first end edge of said bushing are engaged, said mechanical stop being arranged to selectively abut said bushing to limit the motion of said valve member relative to said bushing and, in turn, the extent of movement of said shoulder away from engagement with said first end edge of said bushing, wherein said constant area annular flow opening can be selected as a function of said predetermined distance between said mechanical stop and said bushing. 13. The metering valve according to claim 12, wherein said stop is a ring member mounted on an exterior of said valve member and arranged to abut said second end edge of said bushing to limit the motion of said valve member relative to said bushing. 14. The metering valve according to claim 12, wherein said predetermined distance between said mechanical stop and said bushing is variable by changing the position of said mechanical stop. 15. The metering valve according to claim 12, wherein said predetermined distance between said mechanical stop and said bushing is variable by changing a dimension of said mechanical stop. 16. A fuel injector comprising: an injector body including a fuel inlet and first and second fuel outlet paths, a portion of the admitted fuel leaving said injector body through said first fuel outlet path; a metering valve located in said injector body and comprising: a bushing having first and second end edges; a hollow elongate valve member slidably disposed within said bushing along an axial direction of said valve member, said valve member having opposing open and closed ends and a flow metering valve head located at said closed end, said valve member further including at least one transverse bore formed therethrough adjacent said closed end, wherein said valve head includes a shoulder sized so as to be selectively engageable with said first end edge of said bushing, and a radially inwardly tapering exterior diameter in the axial direction away from said shoulder, wherein an annular volume is defined between an interior of said bushing and an exterior of said valve member, a first axial end of said annular volume being selectively closed by engagement between said shoulder and said first end edge of said bushing and a second axial e