Patent ID: 6877938

Claim:
A machine-tool (M) for very high-speed machining comprising: a parallel structure comprising link bars ( 100 ), each linking bar having a first end and a second end, wherein the first end ( 110 ) of each link bar is linked to a mobile member ( 200 ) adapted to support at least one tool, and wherein the second end ( 120 ) of each link bar is linked to at least one driving means ( 300 ) with respect to a frame (B), said bars being equipped at the first and second end with a linkage ( 400 ) that permits a rotation along at least two axes, wherein the linkage ( 400 ) at the ends ( 110 , 120 ) of the bars are constituted by a combination of fictitious pivots ( 410 , 420 , 430 ) to form a joint, the degrees of freedom of which permit setting the parallel structure in motion, and wherein the profile of said link bars ( 100 ) allows torsional deformation without reaching their elastic limit, so that one of the fictitious pivots ( 430 ) forming the linkage ( 400 ) is formed by the elasticity of the bar ( 100 ) itself.