Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
132 words
A method of manufacturing annular metal parts having a deeply profiled cross-section, such as blank flanges, comprising heating a workpiece bloom to a forging temperature, upsetting and piercing the workpiece to form a pierced blank, roughing the pierced blank by applying a force acting at least on the outside and inside periphery of the blank while the blank is being rotated in order to form the blank into a ring having a substantially rectangular cross-section and an inside diameter which is equal to or slightly larger than the inside diameter of the finished part and, thereupon, rotating the ring and shaping it to the desired profile by directing a force on the front faces of the rotating ring and finish-rolling the ring to the final internal and external diameters of the part.
Claim 2
Independent Claim
132 words
A method of manufacturing annular metal parts having a deeply profiled cross-section, such as blank flanges, comprising heating a workpiece bloom to a forging temperature, upsetting and piercing the workpiece to form a pierced blank, roughing the pierced blank by applying a force acting at least on the outside and inside periphery of the blank while the blank is being rotated in order to form the blank into a ring having a substantially rectangular cross-section and an inside diameter which is equal to or slightly larger than the inside diameter of the finished part and, thereupon, rotating the ring and shaping it to the desired profile by directing a force on the front faces of the rotating ring and finish-rolling the ring to the final internal and external diameters of the part.
Claim 3
Dependent Claim
37 words
A method of manufacturing annular metal parts having a deeply profiled cross-section, according to claim 1, wherein during the roughing operation, forces are exerted simultaneously on the peripheral surfaces and the front surfaces of the rotating blank.
Claim 4
Dependent Claim
38 words
A method of manufacturing annular metal parts having a deeply profiled cross-section, according to claim 1, wherein during the finish-rolling operation, the material flow from the ring as it is being rotated is limited in the radial direction.
Claim 5
Independent Claim
160 words
A method of manufacturing annular workpieces having a deeply profiled cross section such as blank flanges, comprising heating a bloom or bar blank to a forging temperature, upsetting and piercing the heated blank, subsequently rough forming the upset and pierced blank in a first ring rolling process by rotating it and applying a force acting at least on the outside and inside of the rotating blank to form a ring having a substantially rectangular cross section with an inside diameter which is equal to and slightly larger than that of the finished workpiece and an outside diameter which is substantially smaller than the maximum diameter of the finished workpiece, and finally finish rolling the rough formed blank in another ring rolling process by applying a force acting on the front face of the rotating workpiece to shape the workpiece to profile and to finish roll it to the final diameter, with the inside diameter being subject to substantially no change.
Claim 6
Independent Claim
160 words
A method of manufacturing annular workpieces having a deeply profiled cross section such as blank flanges, comprising heating a bloom or bar blank to a forging temperature, upsetting and piercing the heated blank, subsequently rough forming the upset and pierced blank in a first ring rolling process by rotating it and applying a force acting at least on the outside and inside of the rotating blank to form a ring having a substantially rectangular cross section with an inside diameter which is equal to and slightly larger than that of the finished workpiece and an outside diameter which is substantially smaller than the maximum diameter of the finished workpiece, and finally finish rolling the rough formed blank in another ring rolling process by applying a force acting on the front face of the rotating workpiece to shape the workpiece to profile and to finish roll it to the final diameter, with the inside diameter being subject to substantially no change.