Pipe joints or couplings – Nonmetal to metal – Internal member
Patent
1992-07-01
1994-05-10
Nicholson, Eric K.
Pipe joints or couplings
Nonmetal to metal
Internal member
285259, 2853345, 285349, 285379, 29508, F16L 3320
Patent
active
053102240
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a process for manufacturing a hose coupling component, which comprises a pipe sleeve, which is provided at a first end with a periferal flange projecting from the lateral surface of the sleeve, said flange having a side facing towards a second end of the pipe sleeve and inclined towards said first end, said flange forming an outer limitation of a circumferential groove which is open towards said first end for a gasket ring, said pipe sleeve having as well between its ends a portion with a circumferential profile. The invention also relates to a hose coupling component of this type.
Such a coupling component is used, for example, in hose connections between a turbo charger unit and an air cooler in turbo charged internal combustion engines. The hose connections are intended to absorb the relative movement between the spring suspended engine and the charge-air cooler rigidly mounted on the vehicle frame and it must therefore be able to withstand high temperatures, excessive pressure and mechanical stresses.
A known hose coupling of the type in question consists of an inner pipe sleeve, over which a flexible hose is forced, and an outer ring which is pressed over the hose coaxially with the inner sleeve. The inner sleeve is made of aluminum and the details described in the introduction, such as the flange, the periferal gasket groove and the profiles are made by turning a sleeve blank. In addition to these details, a radial flange is made during the lathe turning of the sleeve blank axially inside the first mentioned flange. The radial flange is intended, inter alia, to serve as an end abutment for the hose and thereby assure that the hose will always be forced the same distance onto the sleeve for assembly, which is important to prevent variations in the total length of the hose and the hose connection between vehicles produced on the assembly line.
This known coupling component, due to its two flanges and the periferal gasket groove at one end, thus has a relatively complicated shape which cannot be produced effectively in any other manner than by machining.
SUMMARY
The purpose of the present invention is to achieve, through a simple modification of the design of the known coupling component, a simpler and less expensive method for its manufacture.
This is achieved according to the invention by virtue of the fact that a bowl is pressed from a sheet metal element, that the upper edge portion of the bowl is folded, so that said flange and the circumferential groove are formed, that the bottom of the bowl is cut away, and that a portion between the flange and an opposite end of the sheet metal element is press rolled so that a profile in the form of a depression is formed in the lateral surface of the pipe sleeve.
This simplification of the end portion of the pipe sleeve due to elimination of the flange serving as a hose abutment, makes it possible to manufacture the pipe sleeve of the coupling component by a pressing process instead of by machining. The depression formed between the two steps serves as a reference for axially positioning the hose on the sleeve. The hose can thus be made with an inner periferal bead at a specific distance from the end of the hose, and when the hose is forced onto the sleeve, the bead will slip into the depression and indicate the correct relative positioning of the components.
BRIEF DESCRIPTION OF PREFERRED EMBODIMENTS
The invention will be described in more detail below with reference to examples shown in the accompanying drawings, where
FIG. 1 shows a partially sectioned side view of a previously known coupling component with hose,
FIG. 2 is a view corresponding to FIG. 1 of a coupling component according to the invention, and
FIGS. 3a and 3b are cross-sections through the inner pipe sleeve in FIG. 2 in different stages of manufacture.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
FIG. 1 shows a known design, where 1 designates a corrugated hose of elastic material, which is forced onto an inner coupling
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patent: 4693502 (1987-09-01), Oetiker
patent: 5127157 (1992-07-01), Oetiker
AB Volvo
Nicholson Eric K.
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