Abstract:
On usine la barre, selon un profil longitudinal et/ou circonférentiel souhaité, par des outils rotatifs (3) portés par un plateau principal (5) entraîné en rotation sur le châssis (20), les outils étant liés au plateau par des supports d'outils (4) mobiles radialement sur ce plateau, et on commande, en fonction dudit profil souhaité, un déplacement radial des supports d'outils en fonction de la position axiale de la barre par rapport au châssis et/ou de la position circonférentielle des outils par rapport à la barre. Pour commander ledit déplacement radial, on entraîne en rotation, coaxialement au plateau principal (5), un plateau secondaire (6) comportant des moyens d' actionnement (42) des supports d'outils (4), agencés de manière que la position des supports d'outils soit fonction de la position angulaire relative entre le plateau principal et le plateau secondaire et, pour ajuster le positionnement radial des outils en permanence lors de la rotation du plateau principal (5), on modifie ladite position angulaire relative.
Abstract:
The bar is machined, according to a required longitudinal and/or circumferential profile, by rotating tools carried by a main plate driven in rotation on the frame, the tools being connected to the plate by tool supports radially mobile on this plate, and depending on the required profile, a radial movement of the tool supports is controlled according to the axial position of the bar in relation to the chassis and/or the circumferential positions of the tools in relation to the bar. To control the radial movement, a secondary plate is driven in rotation coaxially to the main plate. The secondary plate including a device for actuating tool supports, arranged so that the positions of the tool supports depend on the relative angular position between the main plate and the secondary plate and, to permanently adjust the radial positioning of the tools during the rotation of the main plate, the relative angular position is modified.
Abstract:
Device for manufacturing elongate parts of revolution, in particular made of wood, having a variable cross section in the longitudinal direction, by machining a bar (B), the device comprising a fixed chassis (1) bearing guide means (2) for guiding said bar in translation and maintaining it fixed in rotation, a turning assembly (4) which is rotated and comprises a plate (41) and at least two rotating tools (3) supported by movable supports (5) guided with respect to the plate and on which the tools are rotated about respective axes of rotation (A2) substantially parallel to the main axis, and the device comprises means for controlling the position of the supports which comprise drive means (92) fastened to the chassis and mechanical transmission means (71 to 76) providing a connection between said drive means and said supports (5), such that the distance between the axes of the tools and the main axis is continuously adjustable by controlling said drive means (92).