Abstract The specification discloses a method of manufacturing an insert for an end fitting from a length of tubular material, the insert having a B.S.P. nipple or like nipple on the end thereof, comprising the steps of forming, by means of a first punch which is inserted within the tube and co-operates with a first die located around the length adjacent one end of the tube, an enlargement of the bore of the tube at the one end thereof and an external annular abutment facing axially away from the one end where the enlargement joins the tube, and then forming the enlargement at the one end to provide the required external sealing face of the nipple. There is also disclosed a hose end fitting comprising an insert made by this method combined with a ferrule surrounding at least part of the insert and defining with the other end thereof an annular space for receiving an end portion of a hose, the end of the ferrule remote from the other end of the insert being swaged inwardly to engage the insert and hold the ferrule against relative axial movement with respect to the insert.
A method of manufacturing an improved insert for an end fitting from a length of tubular material which insert has a B.S.P. nipple or like nipple on the end thereof, an outwardly directed circumferential rib spaced along the insert from the nipple and an annular radial abutment surface where the nipple joins the remainder of the insert, which surface faces toward the rib, which method comprises (a) forming the rib at a location part way along the length of the tubular material by means of a first punch and die combination operable to form the rib while supporting the bore of the tubular material against collapse, (b) forming by means of second punch and die combination an enlargement at one end of the tubular material to form the radial abutment surface and to start forming the nipple and (c) engaging a third punch and die combination with said enlargement to finish form the nipple.
Claim 2
Independent Claim
154 words
A method of manufacturing an improved insert for an end fitting from a length of tubular material which insert has a B.S.P. nipple or like nipple on the end thereof, an outwardly directed circumferential rib spaced along the insert from the nipple and an annular radial abutment surface where the nipple joins the remainder of the insert, which surface faces toward the rib, which method comprises (a) forming the rib at a location part way along the length of the tubular material by means of a first punch and die combination operable to form the rib while supporting the bore of the tubular material against collapse, (b) forming by means of second punch and die combination an enlargement at one end of the tubular material to form the radial abutment surface and to start forming the nipple and (c) engaging a third punch and die combination with said enlargement to finish form the nipple.
Claim 3
Dependent Claim
48 words
A method as claimed in claim 1 wherein the first punch and die combination form the rib by applying an axial force to one end of the tubular material to expand the wall of the tubular material into a recess in a die member surrounding the tubular material.
Claim 4
Dependent Claim
33 words
A method as claimed in claim 1 wherein the rib is used to hold the length of tubular material against axial movement during forming by the second and third punch and die combination.