FR2760674A1 - Rotary cutting tool with detachable cutters - Google Patents
Rotary cutting tool with detachable cutters Download PDFInfo
- Publication number
- FR2760674A1 FR2760674A1 FR9703049A FR9703049A FR2760674A1 FR 2760674 A1 FR2760674 A1 FR 2760674A1 FR 9703049 A FR9703049 A FR 9703049A FR 9703049 A FR9703049 A FR 9703049A FR 2760674 A1 FR2760674 A1 FR 2760674A1
- Authority
- FR
- France
- Prior art keywords
- cutting tool
- tool according
- cutting
- discs
- wedge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
- B27G13/00—Cutter blocks; Other rotary cutting tools
- B27G13/02—Cutter blocks; Other rotary cutting tools in the shape of long arbors, i.e. cylinder cutting blocks
- B27G13/04—Securing the cutters by mechanical clamping means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
- B27G13/00—Cutter blocks; Other rotary cutting tools
- B27G13/005—Tools composed of two or more rotating discs
Abstract
Description
La présente invention a pour objet un perfectionnement apporté aux outils de coupe rotatifs à couteaux amovibles. The present invention relates to an improvement made to rotary cutting tools with removable knives.
Des outils de coupe rotatifs du type concerné sont utilisés par exemple comme arbres de dégauchisseuses, comme arbres de coupe pour tondeuse à gazon, ceci non limitativement. Rotary cutting tools of the type concerned are used for example as jointer shafts, as cutting shafts for lawn mowers, this without limitation.
On connait du document EP O 117 991-B1 des outils de coupe à couteaux amovibles constitués d'un empilage de disques enfilés sur des tiges de serrage. Les disques comportent des découpes périphériques qui, mises bout à bout, déterminent une gorge longitudinale recevant une lame de coupe amovible. La lame de coupe est bloquée en position par la combinaison d'une découpe périphérique spécifique et de coins de maintien. Document EP 0 117 991-B1 discloses cutting tools with removable knives consisting of a stack of discs threaded on clamping rods. The discs have peripheral cutouts which, placed end to end, determine a longitudinal groove receiving a removable cutting blade. The cutting blade is locked in position by the combination of a specific peripheral cut and holding corners.
Cette structure est complexe et donc de mise en oeuvre onéreuse, limitant son application à des machines de coupe sophistiquées. This structure is complex and therefore expensive to use, limiting its application to sophisticated cutting machines.
Le besoin se fait donc sentir d'outils de coupe rotatifs à couteaux amovibles dans lesquels le blocage des lames de coupe et leur chargement sont opérés de manière fiable et simple, avec un coût de construction peu onéreux. There is therefore a need for rotary cutting tools with removable knives in which the blocking of the cutting blades and their loading are carried out in a reliable and simple manner, with an inexpensive construction cost.
Conformément à l'invention, ce résultat est obtenu avec un outil de coupe rotatif à couteau amovibles, du type comportant un empilage de disques métalliques enfilés sur un arbre, lesdits disques comportant des évidements périphériques, la juxtaposition des évidements des disques déterminant une ou plusieurs gorges réceptrices pour les couteaux de coupe, caractérisé en ce que les disques métalliques sont obtenus par fonderie sous pression. According to the invention, this result is obtained with a rotary cutting tool with removable knife, of the type comprising a stack of metal discs threaded on a shaft, said discs comprising peripheral recesses, the juxtaposition of the disc recesses determining one or more receiving grooves for cutting knives, characterized in that the metal discs are obtained by pressure casting.
Avantageusement, on prévoiera que les lames de coupe sont maintenues dans les gorges correspondantes par la coopération d'un ergot de positionnement de la lame, venu de matière avec le disque et d'un coin de blocage inséré dans ladite gorge et maintenu dans celle-ci de préférence sous l'action d'une vis. Advantageously, provision will be made for the cutting blades to be held in the corresponding grooves by the cooperation of a lug for positioning the blade, integrally formed with the disc, and a blocking wedge inserted in said groove and held therein. preferably under the action of a screw.
On comprendra mieux l'invention à l'aide de la description faite ci-après d'un mode de mise en oeuvre donné à titre d'exemple non limitatif, en référence aux dessins annexés dans lesquels - la figure 1 est une vue en élévation d'un arbre de coupe conforme à l'invention, avec vue écorchée partielle au niveau de l'assemblage de deux disques, - la figure 2 est une vue de dessus d'un disque conforme à l'invention, - la figure 2A est une vue en coupe selon A-A de la figure 2, - la figure 3 est une vue agrandie en coupe d'une lame et de son coin de maintien - la figure 4 est une vue partielle en perspective d'une variante de mise en oeuvre. The invention will be better understood with the aid of the description given below of an embodiment given by way of nonlimiting example, with reference to the appended drawings in which - Figure 1 is an elevation view of a cutting shaft according to the invention, with a partial cutaway view of the assembly of two discs, - Figure 2 is a top view of a disc according to the invention, - Figure 2A is a sectional view along AA of Figure 2, - Figure 3 is an enlarged sectional view of a blade and its retaining wedge - Figure 4 is a partial perspective view of an alternative embodiment.
L'arbre de coupe généralement référencé (1 ) comporte essentiellement un arbre proprement dit (2) sur lequel sont enfilés une pluralité de disques (3 juxtaposés. The generally referenced cutting shaft (1) essentially comprises a proper shaft (2) on which are threaded a plurality of discs (3 juxtaposed.
On ne décrira pas plus en détails les structures extérieures à l'arbre permettant le positionnement et l'utilisation de celui-ci, pas plus que les aménagements spécifiques de l'arbre qui y correspondent. The structures external to the tree allowing the positioning and the use thereof will not be described in more detail, any more than the specific arrangements of the tree which correspond to it.
Les disques seront enfilés sur l'arbre pour venir en butée sur des anneaux de maintien (4). Ils seront bloqués en position et verrouillés longitudinalement par des anneaux de blocage (5). The discs will be threaded on the shaft to come into abutment on retaining rings (4). They will be locked in position and locked longitudinally by locking rings (5).
Les disques (3), tels que celui représenté à la figure 2, sont réalisés en fonderie sous pression. The discs (3), such as that shown in FIG. 2, are produced in a pressure foundry.
Ils présentent donc une certaine épaisseur ce qui limite leur nombre pour une longueur d'arbre donnée, entrainant une économie par rapport aux arbres de l'art antérieur.They therefore have a certain thickness which limits their number for a given shaft length, resulting in savings compared to the trees of the prior art.
Les disques (3) comportent respectivement - un évidement central (6) de section triangulaire à angles tronqués et arrondis, - un ou plusieurs évidements périphériques (7), - un ou plusieurs plots de positionnement relatif (8). The discs (3) respectively comprise - a central recess (6) of triangular section with truncated and rounded angles, - one or more peripheral recesses (7), - one or more pads for relative positioning (8).
L'évidement central (6) permet d'enfiler chaque disque sur l'arbre (2). L'arbre (2) aura une section correspondant à celle des évidements (6), assurant ainsi leur blocage en rotation relative par rapport à l'arbre. The central recess (6) allows each disc to be threaded onto the shaft (2). The shaft (2) will have a section corresponding to that of the recesses (6), thus ensuring their locking in relative rotation relative to the shaft.
Le positionnement relatif des disques l'un par rapport à l'autre est conforté par des plots de positionnement (8). Ils sont composés d'évidements femelle (9) coopérant avec des saillies (10). The relative positioning of the discs relative to each other is supported by positioning pads (8). They are composed of female recesses (9) cooperating with projections (10).
On assurera ainsi un positionnement relatif des disques l'un par rapport à l'autre et chaque disque est rendu solidaire en rotation des disques adjacents. This will ensure relative positioning of the discs relative to each other and each disc is made integral in rotation with the adjacent discs.
Les évidements périphériques (7) seront par exemple un nombre de trois par disque, selon une répartition angulaire à 1200. The peripheral recesses (7) will for example be three in number per disc, according to an angular distribution of 1200.
Ils comportent un ergot (11) formant redant coopérant avec une gorge (12) de la lame de coupe (13). La lame de coupe est positionnée grâce à l'ergot (11) et à la gorge (12). They comprise a lug (11) forming a rim cooperating with a groove (12) of the cutting blade (13). The cutting blade is positioned using the lug (11) and the groove (12).
Elle est maintenue en position et bloquée par un coin (14). It is held in position and blocked by a wedge (14).
L'évidement (7) comporte une paroi droite (15) sur laquelle est ménagé l'ergot (11) et une paroi en contre-dépouille (16). The recess (7) has a straight wall (15) on which the lug (11) is formed and a wall undercut (16).
Le coin (14) comporte une face plane (17) venant en appui contre la face arrière de la lame de coupe et une face inclinée (18) venant en appui contre la contre-dépouille (16). The corner (14) has a flat face (17) bearing against the rear face of the cutting blade and an inclined face (18) bearing against the undercut (16).
Le coin est inséré latéralement dans l'évidement (7). Il y est maintenu par vissage d'une vis sans tête à bout plat (19). The wedge is inserted laterally into the recess (7). It is held there by screwing a flat headless screw (19).
Pour une application plus spécifique à une tondeuse à gazon, il est possible de simplifier la structure eu égard à la nature du matériau à couper. Une telle structure est représentée à la figure 4;
Dans cette variante de mise en oeuvre, L'arbre est constitué par l'empilement de disques en étoile à trois branches (20) enfilés sur un axe central (21). Ils seront également réalisés en fonderie sous pression. For a more specific application to a lawn mower, it is possible to simplify the structure having regard to the nature of the material to be cut. Such a structure is shown in Figure 4;
In this variant of implementation, the shaft is constituted by the stack of star discs with three branches (20) threaded on a central axis (21). They will also be produced in a pressure foundry.
La lame coupante (22) est maintenue dans l'évidement (23) comme précédemment en (26), avec en outre une cale (24) formant coin qui est poussée par une autre cale pentue (25). The cutting blade (22) is held in the recess (23) as previously at (26), with a wedge wedge (24) which is further pushed by another sloping wedge (25).
Les lames de coupe pourront être inclinées selon l'angle désiré par rapport à la génératrice du cylindre de coupe, en fonction de la forme du disque et de l'évidement (26). The cutting blades can be inclined at the desired angle relative to the generatrix of the cutting cylinder, depending on the shape of the disc and the recess (26).
Une autre lame fixe ou contra-rotative (27) permet d'effectuer une coupe par cisaillement. Another fixed or counter-rotating blade (27) allows cutting by shearing.
Claims (9)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9703049A FR2760674B1 (en) | 1997-03-11 | 1997-03-11 | IMPROVEMENT IN ROTARY CUTTING TOOLS WITH REMOVABLE KNIVES |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9703049A FR2760674B1 (en) | 1997-03-11 | 1997-03-11 | IMPROVEMENT IN ROTARY CUTTING TOOLS WITH REMOVABLE KNIVES |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2760674A1 true FR2760674A1 (en) | 1998-09-18 |
FR2760674B1 FR2760674B1 (en) | 1999-05-28 |
Family
ID=9504748
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR9703049A Expired - Fee Related FR2760674B1 (en) | 1997-03-11 | 1997-03-11 | IMPROVEMENT IN ROTARY CUTTING TOOLS WITH REMOVABLE KNIVES |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2760674B1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003011541A1 (en) * | 2001-07-30 | 2003-02-13 | Key Knife, Inc. | Knife and apparatus for clamping a knife |
EP1577069A2 (en) * | 2004-03-16 | 2005-09-21 | Key Knife, Inc. | High speed planer head |
US7708040B2 (en) | 2004-03-16 | 2010-05-04 | Key Knife, Inc. | High speed planer head |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1432580A (en) * | 1921-03-05 | 1922-10-17 | Jacques L Vauclain | Milling cutter |
US2969816A (en) * | 1959-05-11 | 1961-01-31 | Atlanta Oak Flooring Company | Cylindrical cutter head having multidrum axially aligned sections with angularly disposed blades |
FR2327010A1 (en) * | 1975-10-10 | 1977-05-06 | Hoffmann Hans Georg | HAND TOOL FOR WORK BY REMOVING CHIPS, AND PROCESS FOR ITS MANUFACTURING |
EP0005906A1 (en) * | 1978-05-31 | 1979-12-12 | Wadkin Public Limited Company | Rotary cutterblock and method for its manufacture |
EP0117991A1 (en) * | 1983-02-09 | 1984-09-12 | Samvaz S.A. | Cutting tool with exchangeable cutting bits |
US4538655A (en) * | 1984-06-25 | 1985-09-03 | Shopsmith, Inc. | Cutter head system |
DE9010999U1 (en) * | 1990-07-25 | 1990-10-11 | Michael Weinig Ag, 6972 Tauberbischofsheim, De | |
US5201353A (en) * | 1991-07-25 | 1993-04-13 | Weill Theodore C | Reconfigurable debarker head |
DE19519597C1 (en) * | 1995-05-29 | 1996-03-07 | Reinhold W Dr Ing Elsen | Angle=cut knife shaft with spiral knives to make wood chips |
-
1997
- 1997-03-11 FR FR9703049A patent/FR2760674B1/en not_active Expired - Fee Related
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1432580A (en) * | 1921-03-05 | 1922-10-17 | Jacques L Vauclain | Milling cutter |
US2969816A (en) * | 1959-05-11 | 1961-01-31 | Atlanta Oak Flooring Company | Cylindrical cutter head having multidrum axially aligned sections with angularly disposed blades |
FR2327010A1 (en) * | 1975-10-10 | 1977-05-06 | Hoffmann Hans Georg | HAND TOOL FOR WORK BY REMOVING CHIPS, AND PROCESS FOR ITS MANUFACTURING |
EP0005906A1 (en) * | 1978-05-31 | 1979-12-12 | Wadkin Public Limited Company | Rotary cutterblock and method for its manufacture |
EP0117991A1 (en) * | 1983-02-09 | 1984-09-12 | Samvaz S.A. | Cutting tool with exchangeable cutting bits |
US4538655A (en) * | 1984-06-25 | 1985-09-03 | Shopsmith, Inc. | Cutter head system |
DE9010999U1 (en) * | 1990-07-25 | 1990-10-11 | Michael Weinig Ag, 6972 Tauberbischofsheim, De | |
US5201353A (en) * | 1991-07-25 | 1993-04-13 | Weill Theodore C | Reconfigurable debarker head |
DE19519597C1 (en) * | 1995-05-29 | 1996-03-07 | Reinhold W Dr Ing Elsen | Angle=cut knife shaft with spiral knives to make wood chips |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003011541A1 (en) * | 2001-07-30 | 2003-02-13 | Key Knife, Inc. | Knife and apparatus for clamping a knife |
US6968879B2 (en) | 2001-07-30 | 2005-11-29 | Key Knife, Inc. | Knife and apparatus for clamping a knife |
EP1577069A2 (en) * | 2004-03-16 | 2005-09-21 | Key Knife, Inc. | High speed planer head |
EP1577069A3 (en) * | 2004-03-16 | 2005-12-21 | Key Knife, Inc. | High speed planer head |
EP1640127A2 (en) * | 2004-03-16 | 2006-03-29 | Key Knife, Inc. | High speed planer head |
EP1640127A3 (en) * | 2004-03-16 | 2006-10-18 | Key Knife, Inc. | High speed planer head |
US7708040B2 (en) | 2004-03-16 | 2010-05-04 | Key Knife, Inc. | High speed planer head |
US7798186B2 (en) | 2004-03-16 | 2010-09-21 | Key Knife, Inc. | High speed planer head |
Also Published As
Publication number | Publication date |
---|---|
FR2760674B1 (en) | 1999-05-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
GC | Lien (pledge) constituted | ||
ST | Notification of lapse | ||
RN | Application for restoration | ||
IC | Decision of the director general to declare irreceivable or to reject an appeal |