Clinch nut and method for manufacturing one such nut
AssigneeBollhoff Otalu S.A.
InventorsJean-Philippe GRIS, Mohamed-Tahar RAHAL
Life of this patent
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Abstract
Method for manufacturing a clinch nut, comprising: cold forging a steel body including a weight percentage of carbon comprised between 0.15% and 0.25% inclusive to form a workpiece including a pliable section designed to deform into a crimping bead and a connection section, applying a heat treatment to the workpiece, and tapping the connection section to form an internal thread.
Claims6
A method for manufacturing a clinch nut, comprising:
- cold forging a steel body to form a workpiece including a pliable section designed to deform into a crimping bead, and a connection section, the steel body comprising a weight percentage of carbon comprised between 0.15% and 0.25% inclusive,
- heating of the workpiece at an annealing temperature comprised between 630° C. and 720° C. inclusive by means of a furnace which has been previously heated to the annealing temperature, and
- tapping the connection section to form an internal thread
A clinch nut, comprising a pliable section designed to deform into a crimping bead, and a connection section comprising an internal thread, the nut being made from steel comprising a weight percentage of carbon comprised between 0.15% and 0.25% inclusive, a weight percentage of manganese comprised between 0.9% and 1.2% inclusive and a weight percentage of boron comprised between 0.0008% and 0.0050% inclusive.
Dependencies are inferred from the claim text.