Method of manufacturing the thread of a nut in a screw and nut system
AssigneeAktiebolaget Skf
InventorsEric Allegri, Gilles Pajean
Life of this patent
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Abstract
A method of manufacturing a nut in a screw and nut system comprises a first material removal stage to form an internal thread of which the value of the nominal diameter is lower than a predetermined final nominal diameter value and a second plastic deformation stage of the thread formed during the first stage to obtain the predetermined final value by material displacement.
Claims13
A method of manufacturing an internal thread of a nut configured to be used in a screw-and-nut system, the method comprising:
- forming the internal thread in the nut with a material removal stage, a nominal diameter value of the internal thread being less than a predetermined final nominal diameter value, and
- after forming the internal thread, during a plastic deformation stage, displacing material of the internal thread formed during the material removal stage to obtain the predetermined final nominal diameter value,
- the method including forming a groove on the internal thread during the material removal stage.
A method of manufacturing an internal thread of a nut configured to be used in a screw-and-nut system, the method comprising:
- forming an internal thread having a nominal diameter in the nut by removing material from an inner wall of the nut, and
- after forming the internal thread, increasing the nominal diameter of the internal thread by plastic deformation of the internal thread without removing material from the inner wall of the nut,
- the method including forming a groove in a surface of the internal thread.
A method of manufacturing an internal thread of a nut configured to be used in a screw-and-nut system, the method comprising:
- forming an internal thread having a nominal diameter in the nut by removing material from an inner wall of the nut, and
- after forming the internal thread, increasing the nominal diameter of the internal thread by plastic deformation of the internal thread without removing material from the inner wall of the nut,
- the method including forming a chamfer at a vertex of the internal thread and wherein increasing the nominal diameter of the internal thread incudes deforming the chamfer.
Dependencies are inferred from the claim text.