FR2600580A1

FR2600580A1 - Machining method and device for producing components of revolution made from multi-ply wood

Info

Publication number: FR2600580A1
Application number: FR8609490A
Authority: FR
Inventors: Rene Bessiere
Original assignee: Bessiere SA Entreprise
Current assignee: Bessiere SA Entreprise
Priority date: 1986-06-27
Filing date: 1986-06-27
Publication date: 1987-12-31

Abstract

Method and device for producing components of revolution made from multi-ply wood consisting of successive layers of intercrossed bonded wood, consisting in rough-cutting the component 10 held on a lathe by means of a cutter 1 rotating in a direction identical to the direction of rotation of the said component 10 while it moves along the latter, then in obtaining the desired shape by means of a fixed finishing tool 11 as it moves along the said component 10, the cutter 1 and the fixed tool 11 being held by the jacks 3, 12 immobilised on the moving carriages 5, 13 sliding on the guide rails 6, 14 by means of the jacks 7, 15, the position of the cutter 1 and of the fixed tool 11 being obtained by feelers 8, 16 bearing on forms 9, 17.

Description

La présente invention concerne un procédé et un dispositif pour réaliser des pièces de révolution en bois multiplis constitué de couches successives de bois collées. entrecroisées. The present invention relates to a method and a device for producing pieces of revolution in plywood consisting of successive layers of glued wood. intersecting.

On connait la réalisation de pièces de révolution au moyen de tours consistant à mettre en rotation la pièce à usiner autour de son axe de révolution alors que se déplace longitudinalement l'outil coupant effectuant l1arrachement des copeaux, ce procédé est applicable pour l'usinage des pièces en bois massif lorsque l'outil coupant se déplace selon le sens longitudinal des fibres, par contre il est pratiquement impossible de réaliser des pièces de révolution lorsque l'outil coupant se déplace selon le sens transversal des fibres car il provoque l'éclatement du bois, il en est de même lorsque l'on désire réaliser des pièces de révolution en bois multiplis compte tenu de l'alternance de bois de fil et de bout. We know the production of pieces of revolution by means of lathes consisting in rotating the workpiece around its axis of revolution while the cutting tool moves longitudinally removing the chips, this process is applicable for the machining of solid wood parts when the cutting tool moves in the longitudinal direction of the fibers, on the other hand it is practically impossible to produce pieces of revolution when the cutting tool moves in the transverse direction of the fibers because it causes the splitting of the wood, it is the same when you want to make pieces of revolution in plywood given the alternation of wood and end grain.

Le procédé et dispositif, objets de l'invention sont caractérisés en ce qu'ils consistent à engendrer la rotation de la pièce à usiner selon un même sens que le sens de rotation d'une fraise lors de son déplacement selon un sens parallèle à ladite pièce servant à dégrossir cette dernière, la forme définitive étant obtenue au moyen d'un outil fixe mobile selon un sens parallèle à ladite pièce. The method and device, objects of the invention are characterized in that they consist in causing the rotation of the workpiece in the same direction as the direction of rotation of a cutter during its movement in a direction parallel to said part used to trim the latter, the final shape being obtained by means of a fixed movable tool in a direction parallel to said part.

D'autres caractéristiques et avantages de l'invention ressortiront plus clairement de la description qui va suivre faîte en regard des dessins schématiques joints donnés à titre d'exemple non limitatif, où
- la figure 1 est une vue de dessus du dispositif d'usinage,
- la figure 2. une vue de face à l'aplomb de la fraise de dégrossissage,
- la figure 3, une vue de face à l'aplomb de l'outil fixe de finition.Other characteristics and advantages of the invention will emerge more clearly from the description which follows, made with reference to the attached schematic drawings given by way of nonlimiting example, where
FIG. 1 is a top view of the machining device,
- Figure 2. a front view perpendicular to the roughing cutter,
- Figure 3, a front view perpendicular to the fixed finishing tool.

Tel que représenté figures 1 et 2, le dispositif objet de l'inven- tion comporte un tour en l'occurrence vertical non représenté sur lequel la pièce 10 à usiner est maintenue entre la poupée motrice et la poupée mobile, parallèlement une fraise 1 rotative et son moteur 2 d'entrainement sont maintenus par un vérin 3 pneumatique ou hydraulique, le fût 4 de ce dernier est immobilisé sur un chariot mobile 5 coulissant sur un rail guide 6, le déplacement vertical de la fraise 1 et moteur 2 étant obtenu par un vérin vertical 7 pneumatique ou hydraulique, la fraise 1 et moteur 2 sont immobilisés par rapport au vérin 3 de manière inclinée et ce afin d'éviter le contact du moteur 2 avec la pièce à usiner lors d'un usinage en creux, durant le travail de la fraise 2 engendrant le dégrossissage de la forme à obtenir ladite fraise durant sa remontée provoquée par le vérin 7 est mise en position par le vérin 3 commandé par un palpeur 8 en appui sur la forme 9, durant le dégrossissage de la pièce 10 cette dernière est entraf- née selon une rotation de même sens que celui de la fraise 1 et ce afin d'augmenter la vitesse de coupe. As shown in FIGS. 1 and 2, the device which is the subject of the invention comprises a tower, in this case vertical, not shown, on which the workpiece 10 to be machined is held between the driving doll and the movable doll, in parallel with a rotary cutter 1 and its drive motor 2 are held by a pneumatic or hydraulic cylinder 3, the barrel 4 of the latter is immobilized on a mobile carriage 5 sliding on a guide rail 6, the vertical movement of the cutter 1 and motor 2 being obtained by a vertical pneumatic or hydraulic cylinder 7, the cutter 1 and motor 2 are immobilized relative to the cylinder 3 in an inclined manner and this in order to avoid contact of the motor 2 with the workpiece during hollow machining, during the work of the cutter 2 causing the roughing of the shape to obtain said cutter during its rise caused by the jack 7 is brought into position by the jack 3 controlled by a feeler 8 bearing on the shape 9, during the roughing of the part 10 the latter is rotated in the same direction as that of the cutter 1 in order to increase the cutting speed.

Selon la figure 3, lorsque la pièce 10 est dégrossie, l'outil fixe 11 raccordé au vérin 12 pneumatique ou hydraulique solidairé du chariot mobile 13 coulissant sur le guide 14 prend contact avec la pièce 10 animée de rotation au moyen du vérin 12 command par le palpeur 16 en appui sur la forme 17, le déplacement vertical de l'outil étant obtenu par le vérin 15 pneumatique ou hydraulique. According to FIG. 3, when the part 10 is roughened, the fixed tool 11 connected to the pneumatic or hydraulic cylinder 12 secured to the movable carriage 13 sliding on the guide 14 makes contact with the part 10 which is driven in rotation by means of the cylinder 12 controlled by the probe 16 rests on the form 17, the vertical displacement of the tool being obtained by the pneumatic or hydraulic jack 15.

Il va de soi que d'autres conceptions connues, pour provoquer les différents déplacements de la fraise 1 et outil 11 peuvent être utilisées sans pour cela sortir du cadre de l'invention. It goes without saying that other known designs for causing the different displacements of the cutter 1 and tool 11 can be used without departing from the scope of the invention.

Claims

CLAIMS 1 ") Machining process for producing multi-ply wooden revolution pieces, characterized in that it consists in roughing the piece (10) of multi-ply wood maintained on a lathe by means of a milling cutter (1) '' A rotation of the same direction as the direction of rotation of said part (10) during its movement along the latter then to obtain the desired shape by means of a fixed finishing tool (11) during its movement along the piece (10).

20) Machining device according to the machining method of claim 1 characterized in that it comprises a lathe on which is held the workpiece (10) to be machined, a rotary cutter (1) placed in parallel held by a cylinder ( 3) immobilized on a mobile carriage (5) sliding on a guide rail (6) whose displacement is generated by a jack (7), a fixed tool (11) parallel to the workpiece connected to a jack (12) integral with a mobile carriage (13) sliding on a guide rail (14) whose vertical movement is generated by a jack (15).

30) Machining device according to claim 2 characterized in that the cutter (1) is kept inclined relative to the part (10) to be machined in order to avoid contact of the motor with the part (10) during machining hollow.

4) Machining device according to claim 2 characterized in that the position of the cutter (1) and the stationary tool (11) during the machining of the part (10) is obtained by feelers (8, 16 ) pressing on a form (9) of roughing and (17) finishing during the movement of the carriages (5, 13) causing the actuators (3, 12) to act.

5) Machining device according to claim 2 characterized in that the rotation of the cutter (1) in a direction identical to the direction of rotation of the workpiece (10) generates an increase in the cutting speed.