MANUFACTURING PROCESS FOR FORMING A SHARP FEATURE IN AN AXIAL SEALING FLUID TRANSPORT FITTING
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United States of America Patent
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Issued Date -
Jun 22, 2023
app pub date -
Oct 31, 2022
filing date -
Dec 17, 2021
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Abstract
A coining apparatus for forming a sealing surface in an end portion of a tube includes an inner portion having a first bead forming surface and an outer portion having a second bead forming surface. The outer portion is arranged concentric to the inner portion with a radial gap formed therebetween. The first bead forming surface and the second bead forming surface each lead towards the gap and are tapered in opposing radial directions. The radial gap provides a pathway for a flow of deformed tube material or a flow of fluid during the formation of an engaging bead in the sealing surface as caused by engagement of the first bead forming surface and the second bead forming surface with the end portion of the tube. The formation of the engaging bead via the coining process results in at least a portion of the engaging bead being work hardened.
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