METHODS AND APPARATUS FOR MAKING RING-SHAPED PARTS

专利名称：METHODS AND APPARATUS FOR MAKING

RING-SHAPED PARTS OUT OF A COMPOSITEMATERIAL, AS WELL AS PREFORMSTHEREFOR

发明人：OLRY, PIERRE,COUPE, DOMINIQUE,JOUIN,

JEAN-MARIE

申请号：EP96922939.2申请日：19960618公开号：EP0833972B1公开日：19990922

摘要：Preforms for making ring-shaped parts out of a composite material may beproduced by winding a strip (1) of fibrous material around an elliptical mandrel (10) toform an elliptical sleeve that may then be cut at an angle either before or after one ormore densifying steps. The cutting plane is tilted relative to a straight cross-section ofthe elliptical sleeve, and the inner and outer portions of the cut rings are machined toform circular elements. Such elements may be used to produce ring-shaped parts madeof a composite material having a reduced susceptibility to delamination when subjectedto circumferential stress. The adjacent layers are needled during the winding process. Auniform needling surface density may be achieved by controllably moving the needleboard (5) and the elliptical mandrel (10) relative to one another as the mandrel rotates,in order to compensate for the eccentricity of the mandrel cross-section. Such methodsare particularly useful for producing brake disc preforms.

申请人：SOCIETE NATIONALE D'ETUDE ET DE CONSTRUCTION DE MOTEURS

D'AVIATION, \"S.N.E.C.M.A.\CONSTRUCTION DE MOTEURS D'AVIATION, \"S.N.E.C.M.A.\"

地址：FR

国籍：FR

代理机构：Joly, Jean-Jacques

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