Slotted component manufacture

B - Operations – Transporting – 23 – D

Patent

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Details

B23D 5/00 (2006.01) B23D 1/20 (2006.01)

Patent

CA 2242612

This invention relates to a method for manufacturing a plurality of longitudinally extending slots in the bore of a component (1). One example of such a component is the sleeve element of an automotive power steering rotary valve. More particularly the invention is directed towards a method of minimising burring of the slot edges of the sleeve component. The method comprises the steps of gripping said component (1) in a gripping means (2) of a workholding device, performing a first cutting operation (5) in which said slot is cut in said bore by a series of progressively deeper cutting strokes of a cutting tool (5), further machining (30) said bore of said component, said machining of said bore being carried out whilst the component remains gripped in said gripping means, characterised in that whilst said component remains gripped in said gripping means said slot undergoes a second cutting operation (5) similar to the first operation.

La présente invention concerne un procédé de réalisation d'une pluralité de rainures longitudinales dans l'alésage d'un composant (1). Ce composant peut notamment être l'élément de chemisage de la soupape à piston d'une direction assistée d'automobile. En l'occurrence, l'invention vise à ramener à un minimum le phénomène d'épaississement des bords affectant les bords de rainures de l'élément de chemisage. Le procédé consiste d'abord à immobiliser le composant (1) dans l'organe d'immobilisation (2) d'un dispositif porte-pièce. Le procédé consiste ensuite à exécuter une première opération de coupe (5) au cours de laquelle l'alésage est entaillé en une succession de passes de coupe de l'outil de coupe (5) de plus en plus profondes. Le procédé consiste enfin à poursuivre l'usinage (30) de l'alésage du composant. L'usinage de l'alésage s'effectue alors que le composant est immobilisé dans l'organe d'immobilisation. L'une des caractéristiques est que pendant que le composant est immobilisé dans l'organe d'immobilisation, la rainure subit une seconde opération de coupe (5) similaire à la première opération.

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Profile ID: LFCA-PAI-O-2002311

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