EP1955832A1 - Vibrating cutting device - Google Patents

Vibrating cutting device Download PDF

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Publication number
EP1955832A1
EP1955832A1 EP08370004A EP08370004A EP1955832A1 EP 1955832 A1 EP1955832 A1 EP 1955832A1 EP 08370004 A EP08370004 A EP 08370004A EP 08370004 A EP08370004 A EP 08370004A EP 1955832 A1 EP1955832 A1 EP 1955832A1
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EP
European Patent Office
Prior art keywords
cutting
longitudinal
notch
cutting element
cutting tool
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Granted
Application number
EP08370004A
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German (de)
French (fr)
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EP1955832B1 (en
EP1955832B9 (en
Inventor
Pascal Tierce
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Sinaptec
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Sinaptec
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Publication of EP1955832A1 publication Critical patent/EP1955832A1/en
Publication of EP1955832B1 publication Critical patent/EP1955832B1/en
Application granted granted Critical
Publication of EP1955832B9 publication Critical patent/EP1955832B9/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B7/00—Hand knives with reciprocating motor-driven blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B9/00—Blades for hand knives
    • B26B9/02—Blades for hand knives characterised by the shape of the cutting edge, e.g. wavy

Definitions

  • the present invention relates to a novel cutting device comprising a vibrating slender cutting element of the vibrating cutting blade type.
  • This vibrating slender cutting element may, as the case may be, comprise a tapered and cutting cutting edge, or comprise an untapered cutting edge capable of cooperating with another element comprising a sharp tapered edge.
  • the cutting device of the invention finds, for example, but not exclusively, its application as a manual cutting tool, particularly in the food industry.
  • a first type of cutting device used for example in the food industry, uses vertical cutting blades, and vibrating means for creating vertical vibrations in the blades.
  • the vibration of the blade is relatively simple because the cutting blade vibrates essentially along a single axis (vertical axis).
  • these cutting devices comprising a vibrating blade along a single vibratory axis, are generally mounted on slicing machines, and are not suitable for producing manual cutting tools, that is to say cutting tools. intended to be handled by a user during the cutting operation.
  • the cutting device comprises a flat surgical cutting blade whose distal portion is curved relative to the central longitudinal axis of the blade, so as to create a functional asymmetry, and vibrating means for creating longitudinal vibrations in the opposite proximal portion of the blade.
  • These longitudinal vibrations propagate towards the curved distal portion, and due to the aforementioned functional asymmetry, allow vibration of the blade distal end transversely in the plane of the blade.
  • the cutting blade also comprises upstream of the aforementioned functional asymmetry, a second asymmetry for creating a pivot point in the blade.
  • This cutting device has at least two disadvantages. On the one hand the mechanical assembly between the flat cutting blade and vibrating means, piezoelectric transducer type, is difficult to achieve. On the other hand, the functional asymmetry at the distal end of the blade adversely complicates the manufacture of the blade.
  • the cutting device disclosed in the international patent application WO 03/095028 ( Figures 19A and 19B ), comprises a vibrating monobloc cutting tool, which comprises a bar and a flat cutting blade located in the extension of the bar and connected to the bar by a transition zone.
  • the device further comprises vibrating means for creating in the bar vibrations which are oriented along the longitudinal axis of the bar. These longitudinal vibrations propagate in the cutting tool, and allow to obtain a vibration of the cutting blade with at least one transverse vibratory component in the plane of the blade.
  • a disadvantage of this cutting device lies in the formation of vibration nodes in the blade, which results in the formation, at the cutting edge of the blade, of static zones in which the blade does not vibrate or almost not . These vibration nodes in the blade are detrimental to the quality of the cut, and make this solution suitable only for very short blades.
  • the invention aims to propose a new cutting device comprising an improved vibrating cutting tool, which improves the quality of the vibration of the blade, and thus the quality of the cut, and whose manufacture is simpler only for the cutting device of the international patent application WO2005 / 084264 .
  • This new cutting device can advantageously be used as a manual cutting device; the invention is however not limited to this single application and the cutting device may optionally be adapted to a cutting machine.
  • the invention thus has as its first object a one-piece cutting tool intended to be assembled with vibrating means, so as to constitute the vibrating cutting tool of a cutting device.
  • This cutting tool is known, in particular by the international patent application WO 03/095028 above, in that it comprises a bar and a slender cutting element, located in the extension of the bar and connected to the bar by a transition zone, said cutting element having a longitudinal cutting edge and defining a longitudinal sectional plane (Y, Z) perpendicular to the plane (X, Z) of the cross section of the bar, said cutting element having a dimension (e), measured along the axis (X) perpendicular to this longitudinal section plane (Y, Z ), which is smaller than the dimension (D 1 ) of the cross section of the bar measured along the same axis (X).
  • the one-piece cutting tool comprises a first notch which is formed at least partly in the longitudinal cutting edge of the cutting element, and a second notch, which is made in a part of the cutting element diametrically opposed to the longitudinal cutting edge, and which is offset relative to the first notch along the longitudinal axis (A) of the cutting element and toward the distal free end of the cutting element.
  • these two notches diametrically opposed and offset along the longitudinal axis of the cutting element made it possible to improve the vibratory behavior of the cutting tool.
  • judiciously dimensioning these notches it is possible to avoid the formation of a vibration node (of zero or almost zero amplitude), at least at the longitudinal cutting edge of the elongate cutting element, in a distal zone that extends from the distal end (that is to say the free end of the blade opposite the bar) and over a very long length of the elongate cutting element.
  • the invention also has for another object a cutting device comprising a vibrating monobloc cutting tool referred to above and vibrating means.
  • the vibrating means make it possible to create, in the bar of the cutting tool, longitudinal vibrations, which are oriented along the longitudinal axis (A) of the cutting element, and which allow a vibration of the cutting element.
  • the notches of the cutting tool are made so as to obtain a vibration of the cutting element in said longitudinal cutting plane (Y, Z), without vibration node formation at least the longitudinal cutting edge of the cutting element, and in a distal zone (Z ') extending from the distal free end of the cutting element and at least three quarters of the length (L'). ) of the cutting element between this distal free end and the first notch. More preferably still, said distal zone (Z '), devoid of vibration node, extends from the distal free end of the cutting element to the first notch.
  • the vibrating means are designed to create, in the bar of the cutting tool, vibrations longitudinal with a predefined frequency (f) greater than 10KHz, and preferably greater than or equal to 20 KHz.
  • a vibrating cutting device 1 made according to a first embodiment of the invention.
  • This cutting device 1 has the general shape of a hand knife. It can advantageously be used to manually slice any type of material, and may especially, but not exclusively, be used for manual cutting of food products.
  • This cutting device 1 comprises a one-piece cutting tool 10 with a longitudinal central axis A, which is assembled with vibrating means 11.
  • This one-piece cutting tool 10 is made of metal, for example stainless steel or aluminum. titanium.
  • the one-piece cutting tool 10 comprises a bar 100 and a flat cutting blade 102, which is located in the extension of the bar 100, and is connected to the bar 100 by a junction zone 101.
  • the cutting blade 102 defines a plane longitudinal section referenced (Y, Z) on the Figures 1 to 4 .
  • This longitudinal section plane (Y, Z) corresponds to the longitudinal median plane of the blade 102, and is perpendicular to the transverse plane (X, Y) parallel to the cross section of the bar 100.
  • the bar 100 is of cylindrical shape. This particular form is not limiting of the invention, the bar 100 may have a completely different cross-sectional geometry [plane (X, Y)]) and for example a square, rectangular, oval cross section, etc. .
  • these vibrating means 11 make it possible to generate longitudinal vibrations in the bar 100, that is to say vibrations oriented in the direction parallel to the longitudinal axis A of the bar 100.
  • the structure and operation of these vibrating means 11 are known and therefore will not be detailed. It is simply recalled that these means of Vibration 11 comprises in the usual manner an electrically powered piezoelectric transducer, and a coupling element between this piezoelectric transducer and the bar 100, this coupling element allowing the amplification of the longitudinal vibrations generated by the piezoelectric transducer.
  • these vibrating means 11 are advantageously housed in a cylindrical casing, also acting as a gripping handle for the cutting device 1.
  • the cutting blade 102 is formed in a plate of length (L), width (I) and thin (e). With reference to Figures 2 and 3 the thickness (e) of the blade 102 is smaller than the dimension D 1 of the bar 100 in the transverse plane (X, Z) which corresponds to said thickness (e) and which is perpendicular to the longitudinal section plane (Y, Z).
  • This blade 102 has a longitudinal cutting edge 103 (lower edge of the blade on the figure 1 ), and a longitudinal edge 106 (upper edge of the blade on the figure 1 ) diametrically opposed to the longitudinal cutting edge 103.
  • the width (I) of the blade [largest dimension of the blade 102 in the longitudinal section plane (Y, Z)] is less than or equal to the corresponding dimension D 2 of the bar 100 in this same plane, so that the cutting tool 10 can be easily manufactured by simple machining with removal of material of an initial bar which has the same cross section as the bar 100, and whose length corresponds to the total length of the cutting tool 10.
  • the cutting blade 102 is centered on the bar 100 in the transverse plane (X, Z) ( figure 2 ).
  • the junction zone 101 connecting the bar 100 and the cutting blade 102 has two curved walls 101a which make it possible to achieve a gradual transition of material in the plane (X, Z) between the dimension D 1 in cross section in this plane of bar 100, and the thickness (e) lower blade 102.
  • these two curved walls 101 are symmetrical to each other with respect to the longitudinal central axis A of the bar 100, this feature not however being limiting of the invention.
  • the longitudinal edge 103 of the blade which forms the cutting edge, has a curved profile on a distal portion 103a which extends from the distal free end 102a of the blade 102 (free end of the blade farthest from the bar 100).
  • This distal curved portion 103a is the portion of the blade that is mainly used for cutting a material.
  • the cutting edge 103 of the blade 102 may be thinned, at least in its distal portion 103a ( figure 1 ), so as to form a sharp tapered edge.
  • the distal end 102a of the blade substantially forms a tip, facilitating the insertion of the blade into the material during cutting.
  • the cutting tool 10 has a first longitudinal notch 104 and a second longitudinal notch 105.
  • the first notch 104 is constituted by a cutout which is made at least partly in the longitudinal cutting edge 103 of the blade 102.
  • this cutout 104 is made over the entire thickness (e) of the blade 102 ( figures 3 and 4 ), and has a U-shaped longitudinal profile of length I 1 [ Figure 1 / profile of the cut in the longitudinal section plane (Y, Z)].
  • the longitudinal profile in U of the first blank 104 comprises two curved portions 104a and 104b connected by a central portion 104c, preferably substantially rectilinear.
  • this U-shaped longitudinal profile has a center of symmetry, the two curved portions 104a and 104b having the same radii of curvature and the bottom of the notch 104 corresponding to the said central portion 104c forming a plane parallel to the longitudinal central axis A.
  • said longitudinal profile of the notch 104 being asymmetrical in another variant.
  • this first notch 104 extends longitudinally in the proximal portion 102b of the cutting blade 102, in the transition zone 101 and in the distal portion 100b of the bar. This particular positioning of the first notch 104 along the longitudinal axis A is not limiting of the invention. In another variant, the first notch 104 may extend longitudinally only in the longitudinal cutting edge 103 of the cutting blade 102.
  • the second notch 105 is constituted by a cutout which is made in the longitudinal edge 106 of the blade, diametrically opposed to the cutting edge 103, and which is offset, with respect to the first notch 104, along the longitudinal axis A and in the direction of the blade distal end 102a 102.
  • this cutout 105 is also made over the entire thickness (e) of the blade 102 (FIG. figures 3 and 4 ), and has a U-shaped longitudinal profile of length I 2 [ Figure 1 / profile of the cut in the longitudinal section plane (Y, Z)].
  • the second notch 105 preferably has a longitudinal profile which is asymmetrical.
  • This asymmetrical longitudinal profile comprises two curved portions 105a and 105b connected by a central portion 105c, preferably substantially rectilinear.
  • the two curved portions 105a and 105b respectively have two radii of curvature Ra and Rb which are slightly different, and the bottom of the notch corresponding to the central part 105c above forms a plane which is slightly inclined with respect to the central longitudinal axis AT ( figure 1 angle ⁇ )
  • the second notch 105 is formed in the distal portion of the blade 102 which extends between the first notch 104 and the distal end 102a of blade 102, the two notches 104 and 105 being spaced apart from each other, along the longitudinal axis A, by a distance (d) which is not zero ( figure 1 ).
  • the second notch 105 is indeed offset, with respect to the first notch 104, along the longitudinal axis A and in the direction of the distal blade end 102a, but in such a way that the two notches overlap on part of their lengths (I 1 , I 2 ) in the section plane (Y, Z); in this case, the curved portion 105b proximal of the notch 105 is located at the right of the notch 104 along the Y axis, and the curved distal portion 105a of the notch 105 is located between the distal end 102a of the blade and the distal curved portion 104a of the first notch 104.
  • the vibrating means 11 when they are active, they generate longitudinal vibrations at least one predetermined frequency (f) for exciting at least one own mode of vibration of the cutting tool 10.
  • This frequency of excitation (f) is a function of the geometry of the cutting tool 10, and depends in particular on the length L of the cutting blade 102.
  • the cutting tool 10, and in particular the cutting blade 102 is dimensioned such that this frequency (f) is greater than 10KHz, and more preferably greater than 20KHz, so as to render the vibrations inaudible to the human ear (ultrasonic vibrations).
  • the vibrating means 11 may also be designed to generate multifrequency vibrations, having several (at least two) different frequencies.
  • Said longitudinal vibrations propagate in the bar 100 in the direction of the blade 102, the tool 10 acting as a resonator.
  • the blade 102 vibrates in its longitudinal section plane (Y, Z), with a vibration movement comprising two vibratory components: a longitudinal component along the Z axis and a transverse component along the axis Y.
  • the vibration amplitude of the cutting tool 10 in the cutting plane (Y, Z) (i.e., the resultant of the Y and Z vibratory components) is not identical at every point in the cutting plane. the tool, and in particular at any point of the cutting blade 102. It is symbolized on the figure 5 these amplitude variations by zones having different fillings, each type of filling corresponding to a range of amplitudes which is carried on a vertical scale. With reference to this scale of amplitudes of the figure 5 , the filling corresponding to the bottom of the scale identifies a vibration region of almost zero amplitude characteristic of a vibration node. In contrast, the filling corresponding to the top of the scale identifies a region in which the amplitudes of vibrations (resultant vibratory components in Y and Z) are maximum.
  • the distortion of the figure 5 allows to show that the vibration amplitudes of the blade 102 are advantageously maximum and substantially identical throughout the distal portion (Z1) of the blade 102 which extends substantially between the second notch 105 and the distal end 102a of the blade 102
  • the vibration amplitudes are large, and it There is no vibration knot formation in this region at the cutting edge 103.
  • the cutting quality is in very good consequence.
  • nodal region N (vibration node) in the cutting blade 102; however, this nodal region N is very small, and especially is located at the longitudinal edge 106 opposite the cutting edge 103. It is not detrimental to the quality of cut.
  • the cutting tool is different from the cutting tool 10 of the Figures 1 to 4 , in that its cutting element 102 'is a rectangular flat blade without notch.
  • the cutting tool is different from the cutting tool 10 of the Figures 1 to 4 only in that the cutting blade 102 does not have a notch.
  • the cutting tool is different from the cutting tool 10 of the Figures 1 to 4 only in that the cutting blade 102 has a single proximal notch 104.
  • the cutting tool is different from the cutting tool 10 of the Figures 1 to 4 only in that the cutting blade 102 has a single proximal notch 104 ', which is made exclusively in the blade 102, and which does not extend into the bar 100.
  • the cutting tool is different from the cutting tool 10 of the Figures 1 to 4 only in that the cutting blade 102 has a single distal notch 105.
  • the cutting tool is different from the cutting tool 10 of the Figures 1 to 4 only in that the cutting blade 102 has a distal notch 105, and an additional notch 107 in the bar 100.
  • the cutting tool is different from the cutting tool 10 of the Figures 1 to 4 , in that the cutting blade has the same shape as the blade 102 of Figures 1 to 4 but includes only a first proximal notch 104 ', which is made exclusively in the bar 100, and which does not extend into the blade 102.
  • zone Z1 at the end of the blade in which the amplitudes of vibrations are maximum, is disadvantageously very small, and increases the risk of rupture of the blade in this distal zone.
  • FIG. 13 the deformed of another variant embodiment of a vibrating cutting tool, which is in accordance with the invention.
  • the cutting tool is different from the cutting tool 10 of the Figures 1 to 4 only by the longitudinal position of the first notch 104; in this variant, said first notch 104 extends exclusively into the cutting blade 102.
  • the vibratory behavior of this variant is very satisfactory and comparable to that of the figure 5 .
  • FIG. 14 to 17 another variant embodiment of the invention, which differs from the variant of Figures 1 to 4 , essentially by the implementation of a cutting blade 102 and a longer bar 100, and by the presence of a third notch 107.
  • This third notch 107 extends in the distal portion of the bar 100, and is made in a portion of the bar 100 diametrically opposite the longitudinal cutting edge 103 of the blade.
  • This third notch 107 thus has the same orientation as the second distal notch 105.
  • the vibrations of the blade 102 at the cutting edge 103 are advantageously large and substantially homogeneous over a very wide zone Z 'which extends from the distal free end 102a of the cutting element 102 and over a longer distance. three quarters of the length L 'of the cutting element 102 between this distal free end 102a and the first notch 104.
  • the invention is not limited to the particular geometry of the cutting blade 102 of the appended figures, and in particular to the particular curved profile of the cutting edge 103 of this blade 102, said blade flat which may be generally made in any thin plate (e), and the cutting edge 103 may for example be rectilinear over its entire length or may have a curvilinear profile different from that of the accompanying figures.
  • the cutting blade 102 may be replaced by any elongate cutting element which is located in the extension of the bar 100, which defines a longitudinal sectional plane (Y, Z) perpendicular to the plane (X, Z) of the cross section of the bar, and whose dimension (e) in cross-section and in the direction (Z) perpendicular to this plane of section (Y, Z) is smaller than the dimension (D 1 ) corresponding, for example, and without limitation, the cutting blade 102 can be replaced by a cylindrical cutting rod which has a smaller diameter in cross-section than the diameter of the bar 100, and which is connected to the bar 100 by a frustoconical transition zone.
  • the invention is not limited to the shape and the particular dimensions of the notches 104, 105 and 107 U of the accompanying figures. It is up to the person skilled in the art to adapt the shape and dimensions of the notches 104, 105, 107, the longitudinal positions of the notches 104 and 105 in the blade 102, and where appropriate the longitudinal position of the notch 107 in the distal portion 100b of the bar 100, depending on the geometry and dimensions of the cutting tool 10, so as to obtain at the longitudinal cutting edge 103, a zone of vibration Z 'extended, which does not include vibration node, and wherein the vibration amplitudes are large and preferably substantially homogeneous.
  • the cutting element 102 (blade) has a longitudinal cutting edge 103 which is relatively thin and preferably tapered so as to be sharp.
  • the cutting device may comprise another cutting elongate element (fixed or movable) capable of cooperating with the vibrating cutting element 102 and allowing shear cutting between these two cutting elements. In this case for example, it is not necessary that the edge of cut 103 of the cutting element 102 vibrating is fine and cutting.

Abstract

The tool has an elongated cutting blade (102) fixed to a bar (100) by a transition zone (101). The blade includes a longitudinal cutting edge (103), and defines a longitudinal cutting plane perpendicular to a cross-section plane of the bar. A notch (104) is formed in a part in the blade's cutting edge. A notch (105) is formed in a longitudinal edge (106) of the blade, where the edge (106) is diametrically opposite to the cutting edge that is moved with respect to the notch (104) according to a longitudinal axis of the blade and towards a distal free end of the blade.

Description

Domaine techniqueTechnical area

La présente invention concerne un nouveau dispositif de coupe comportant un élément de coupe longiligne vibrant, du type lame de coupe vibrante. Cet élément de coupe longiligne vibrant peut selon le cas comporter un bord de coupe effilé et coupant, ou comporter un bord de coupe non effilé et apte à coopérer avec un autre élément comportant un bord effilé coupant. Le dispositif de coupe de l'invention trouve par exemple, mais non exclusivement, son application comme outil de coupe manuel, notamment dans le domaine agroalimentaire.The present invention relates to a novel cutting device comprising a vibrating slender cutting element of the vibrating cutting blade type. This vibrating slender cutting element may, as the case may be, comprise a tapered and cutting cutting edge, or comprise an untapered cutting edge capable of cooperating with another element comprising a sharp tapered edge. The cutting device of the invention finds, for example, but not exclusively, its application as a manual cutting tool, particularly in the food industry.

Art antérieurPrior art

Il est à ce jour connu d'utiliser des dispositifs de coupe comportant une lame vibrante, et de préférence une lame vibrante ultrasonore, et pouvant être utilisés pour trancher ou découper différents matériaux.It is known today to use cutting devices comprising a vibrating blade, and preferably an ultrasonic vibrating blade, and can be used to slice or cut different materials.

Un premier type de dispositif de coupe, utilisé par exemple dans le domaine agroalimentaire, met en oeuvre des lames de coupe verticales, et des moyens de mise en vibration permettant de créer des vibrations verticales dans les lames. Dans ces dispositifs de coupe, la mise en vibration de la lame est relativement simple car la lame de coupe vibre essentiellement suivant un axe unique (axe vertical). Néanmoins, ces dispositifs de coupe, comportant une lame vibrante selon un axe vibratoire unique, sont généralement montés sur des machines de tranchage, et ne sont pas adaptés pour réaliser des outils de coupe manuels, c'est-à-dire des outils de coupe destinés à être tenus en main par un utilisateur lors de l'opération de coupe.A first type of cutting device, used for example in the food industry, uses vertical cutting blades, and vibrating means for creating vertical vibrations in the blades. In these cutting devices, the vibration of the blade is relatively simple because the cutting blade vibrates essentially along a single axis (vertical axis). Nevertheless, these cutting devices, comprising a vibrating blade along a single vibratory axis, are generally mounted on slicing machines, and are not suitable for producing manual cutting tools, that is to say cutting tools. intended to be handled by a user during the cutting operation.

On a déjà proposé des outils de coupe manuels à lame vibrante, par exemple dans les demandes de brevet internationales WO03/095028 et WO2005/084264 . Ces outils de coupe manuels à lame vibrante sont principalement destinés à être utilisés dans le domaine chirurgical.It has already been proposed manual cutting tools with vibrating blade, for example in international patent applications WO03 / 095028 and WO2005 / 084264 . These manual vibrating blade cutting tools are primarily intended for use in the surgical field.

Dans la demande de brevet internationale WO2005/084264 , le dispositif de coupe comporte une lame de coupe chirurgicale plate dont la partie distale est courbée par rapport à l'axe longitudinal central de la lame, en sorte de créer une asymétrie fonctionnelle, et des moyens de mise en vibration permettant de créer des vibrations longitudinales dans la partie proximale opposée de la lame. Ces vibrations longitudinales se propagent en direction de la partie distale courbée, et grâce à l'asymétrie fonctionnelle précitée, permettent une mise en vibration de l'extrémité distale de lame transversalement dans le plan de la lame. De préférence, pour accentuer les vibrations transversales de l'extrémité distale de la lame, la lame de coupe comporte également en amont de l'asymétrie fonctionnelle précitée, une deuxième asymétrie permettant de créer un point de pivotement dans la lame. Ce dispositif de coupe présente au moins deux inconvénients. D'une part l'assemblage mécanique entre cette lame de coupe plate et des moyens de mise en vibration, de type transducteur piézoélectrique, est difficile à réaliser. D'autre part, l'asymétrie fonctionnelle au niveau de l'extrémité distale de la lame complique de manière préjudiciable la fabrication de la lame.In the international patent application WO2005 / 084264 , the cutting device comprises a flat surgical cutting blade whose distal portion is curved relative to the central longitudinal axis of the blade, so as to create a functional asymmetry, and vibrating means for creating longitudinal vibrations in the opposite proximal portion of the blade. These longitudinal vibrations propagate towards the curved distal portion, and due to the aforementioned functional asymmetry, allow vibration of the blade distal end transversely in the plane of the blade. Preferably, to accentuate the transverse vibrations of the distal end of the blade, the cutting blade also comprises upstream of the aforementioned functional asymmetry, a second asymmetry for creating a pivot point in the blade. This cutting device has at least two disadvantages. On the one hand the mechanical assembly between the flat cutting blade and vibrating means, piezoelectric transducer type, is difficult to achieve. On the other hand, the functional asymmetry at the distal end of the blade adversely complicates the manufacture of the blade.

Dans une variante particulière de réalisation, le dispositif de coupe, divulgué dans la demande de brevet internationale WO 03/095028 (figures 19A et 19B), comporte un outil de coupe monobloc vibrant, qui comprend un barreau et une lame de coupe plate située dans le prolongement du barreau et reliée au barreau par une zone de transition. Le dispositif comporte en outre des moyens de mise en vibration permettant de créer dans le barreau des vibrations qui sont orientées suivant l'axe longitudinal du barreau. Ces vibrations longitudinales se propagent dans l'outil de coupe, et permettent d'obtenir une mise en vibration de la lame de coupe avec au moins une composante vibratoire transversale dans le plan de la lame.In a particular variant embodiment, the cutting device, disclosed in the international patent application WO 03/095028 ( Figures 19A and 19B ), comprises a vibrating monobloc cutting tool, which comprises a bar and a flat cutting blade located in the extension of the bar and connected to the bar by a transition zone. The device further comprises vibrating means for creating in the bar vibrations which are oriented along the longitudinal axis of the bar. These longitudinal vibrations propagate in the cutting tool, and allow to obtain a vibration of the cutting blade with at least one transverse vibratory component in the plane of the blade.

Un inconvénient de ce dispositif de coupe réside dans la formation de noeuds de vibration dans la lame, ce qui se traduit par la formation, au niveau du bord de coupe de la lame, de zones statiques dans lesquelles la lame ne vibre pas ou quasiment pas. Ces noeuds de vibration dans la lame sont préjudiciables à la qualité de la coupe, et rendent cette solution adaptée uniquement pour des lames très courtes.A disadvantage of this cutting device lies in the formation of vibration nodes in the blade, which results in the formation, at the cutting edge of the blade, of static zones in which the blade does not vibrate or almost not . These vibration nodes in the blade are detrimental to the quality of the cut, and make this solution suitable only for very short blades.

Objectif de l'inventionObjective of the invention

L'invention vise à proposer un nouveau dispositif de coupe comportant un outil de coupe vibrant perfectionné, qui permet d'améliorer la qualité de la vibration de la lame, et de ce fait la qualité de la coupe, et dont la fabrication est plus simple que pour le dispositif de coupe de la demande de brevet internationale WO2005/084264 . Ce nouveau dispositif de coupe peut avantageusement être utilisé comme dispositif de coupe manuel ; l'invention n'est toutefois pas limitée à cette seule application et le dispositif de coupe peut éventuellement être adapté sur une machine de coupe.The invention aims to propose a new cutting device comprising an improved vibrating cutting tool, which improves the quality of the vibration of the blade, and thus the quality of the cut, and whose manufacture is simpler only for the cutting device of the international patent application WO2005 / 084264 . This new cutting device can advantageously be used as a manual cutting device; the invention is however not limited to this single application and the cutting device may optionally be adapted to a cutting machine.

Résumé de l'inventionSummary of the invention

L'invention a ainsi pour premier objet un outil de coupe monobloc destiné à être assemblé avec des moyens de mise en vibration, en sorte de constituer l'outil de coupe vibrant d'un dispositif de coupe. Cet outil de coupe est connu, notamment par la demande de brevet internationale WO 03/095028 précitée, en ce qu'il comporte un barreau et un élément de coupe longiligne, situé dans le prolongement du barreau et relié au barreau par une zone de transition, ledit élément de coupe comportant un bord de coupe longitudinal et définissant un plan de coupe longitudinal (Y,Z) perpendiculaire au plan (X,Z) de la section transversale du barreau, ledit élément de coupe présentant une dimension (e), mesurée suivant l'axe (X) perpendiculaire à ce plan de coupe longitudinal (Y,Z), qui est inférieure à la dimension (D1) de la section transversale du barreau mesurée suivant ce même axe (X).The invention thus has as its first object a one-piece cutting tool intended to be assembled with vibrating means, so as to constitute the vibrating cutting tool of a cutting device. This cutting tool is known, in particular by the international patent application WO 03/095028 above, in that it comprises a bar and a slender cutting element, located in the extension of the bar and connected to the bar by a transition zone, said cutting element having a longitudinal cutting edge and defining a longitudinal sectional plane (Y, Z) perpendicular to the plane (X, Z) of the cross section of the bar, said cutting element having a dimension (e), measured along the axis (X) perpendicular to this longitudinal section plane (Y, Z ), which is smaller than the dimension (D 1 ) of the cross section of the bar measured along the same axis (X).

De manière caractéristique selon l'invention, l'outil de coupe monobloc comporte une première encoche qui est réalisée au moins en partie dans le bord de coupe longitudinal de l'élément de coupe, et une deuxième encoche, qui est réalisée dans une partie de l'élément de coupe diamétralement opposée au bord de coupe longitudinal, et qui est décalée par rapport à la première encoche, selon l'axe longitudinal (A) de l'élément de coupe et en direction de l'extrémité libre distale de l'élément de coupe.According to the invention, the one-piece cutting tool comprises a first notch which is formed at least partly in the longitudinal cutting edge of the cutting element, and a second notch, which is made in a part of the cutting element diametrically opposed to the longitudinal cutting edge, and which is offset relative to the first notch along the longitudinal axis (A) of the cutting element and toward the distal free end of the cutting element.

Il a été constaté que la mise en oeuvre de ces deux encoches diamétralement opposées et décalées suivant l'axe longitudinal de l'élément de coupe permettait d'améliorer le comportement vibratoire de l'outil de coupe. En particulier, en dimensionnant judicieusement ces encoches, il est possible d'éviter la formation de noeud de vibration (d'amplitude nulle ou quasiment nulle), au niveau au moins du bord longitudinal de coupe de l'élément de coupe longiligne, dans une zone distale qui s'étend depuis l'extrémité distale (c'est-à-dire l'extrémité libre de la lame opposée au barreau) et sur une longueur très importante de l'élément de coupe longiligne.It was found that the implementation of these two notches diametrically opposed and offset along the longitudinal axis of the cutting element made it possible to improve the vibratory behavior of the cutting tool. In particular, by judiciously dimensioning these notches, it is possible to avoid the formation of a vibration node (of zero or almost zero amplitude), at least at the longitudinal cutting edge of the elongate cutting element, in a distal zone that extends from the distal end (that is to say the free end of the blade opposite the bar) and over a very long length of the elongate cutting element.

De préférence, mais de manière facultative selon l'invention, l'outil de coupe comporte les caractéristiques techniques additionnelles ci-après, prises isolément ou en combinaison :

  • la deuxième encoche est réalisée dans la partie distale de l'élément de coupe qui s'étend entre la première encoche et l'extrémité distale de l'élément de coupe ;
  • dans une variante de réalisation, la première encoche s'étend en totalité dans l'élément de coupe ; dans une autre variante de réalisation, la première encoche s'étend dans le barreau, dans la zone de transition et dans l'élément de coupe ;
  • l'outil de coupe comporte une troisième encoche qui s'étend en tout ou partie dans le barreau, et qui est réalisée dans une partie de l'outil de coupe diamétralement opposée au bord de coupe longitudinal ;
  • les première et deuxième encoches, et le cas échéant la troisième encoche, présentent des profils longitudinaux en forme de U, l'invention n'étant toutefois pas limitée à cette forme en U particulière ;
  • l'élément de coupe est constitué par une lame de coupe plate ;
  • l'élément de coupe est centré par rapport au barreau ;
  • la plus grande dimension (I) de l'élément de coupe, mesurée dans le plan de coupe longitudinal (Y,Z) suivant l'axe (Y) perpendiculaire à l'axe longitudinal (A) de l'élément de coupe, est inférieure ou égale à la dimension (D2) de la section transversale du barreau mesurée dans le plan de coupe longitudinal (Y,Z) suivant ce même axe (Y) ;
  • la longueur (L) de l'élément de coupe est supérieure à 5 cm, de préférence supérieure à 10 cm, et plus préférentiellement encore supérieure à 20 cm.
Preferably, but optionally according to the invention, the cutting tool has the following additional technical characteristics, taken separately or in combination:
  • the second notch is formed in the distal portion of the cutting element which extends between the first notch and the distal end of the cutting element;
  • in an alternative embodiment, the first notch extends entirely into the cutting element; in another variant embodiment, the first notch extends in the bar, in the transition zone and in the cutting element;
  • the cutting tool comprises a third notch which extends wholly or partly in the bar, and which is formed in a portion of the cutting tool diametrically opposite the longitudinal cutting edge;
  • the first and second notches, and if necessary the third notch, have longitudinal U-shaped profiles, the invention is however not limited to this particular U-shape;
  • the cutting element is constituted by a flat cutting blade;
  • the cutting element is centered with respect to the bar;
  • the largest dimension (I) of the cutting element, measured in the longitudinal section plane (Y, Z) along the axis (Y) perpendicular to the longitudinal axis (A) of the cutting element, is less than or equal to the dimension (D 2 ) of the cross section of the bar measured in the longitudinal section plane (Y, Z) along the same axis (Y);
  • the length (L) of the cutting element is greater than 5 cm, preferably greater than 10 cm, and more preferably still greater than 20 cm.

L'invention a également pour autre objet un dispositif de coupe comportant un outil de coupe monobloc vibrant visé précédemment et des moyens de mise en vibration. Les moyens de mise en vibration permettent de créer, dans le barreau de l'outil de coupe, des vibrations longitudinales, qui sont orientées suivant l'axe longitudinal (A) de l'élément de coupe, et qui permettent une mise en vibration de l'élément de coupe (102) dans le plan de coupe longitudinal (Y,Z) de cet élément de coupe et avec au moins une composante vibratoire transversale qui est perpendiculaire à l'axe longitudinal (A) de l'élément de coupe.The invention also has for another object a cutting device comprising a vibrating monobloc cutting tool referred to above and vibrating means. The vibrating means make it possible to create, in the bar of the cutting tool, longitudinal vibrations, which are oriented along the longitudinal axis (A) of the cutting element, and which allow a vibration of the cutting element. the cutting element (102) in the longitudinal cutting plane (Y, Z) of this cutting element and with at least one transverse vibratory component which is perpendicular to the longitudinal axis (A) of the cutting element.

De préférence, les encoches de l'outil de coupe sont réalisées en sorte d'obtenir une mise en vibration de l'élément de coupe dans ledit plan de coupe longitudinal (Y,Z), sans formation de noeud de vibration au niveau au moins du bord longitudinal de coupe de l'élément de coupe, et dans une zone distale (Z') qui s'étend depuis l'extrémité libre distale de l'élément de coupe et sur au moins les trois quart de la longueur (L') de l'élément de coupe entre cette l'extrémité libre distale et la première encoche. Plus préférentiellement encore, ladite zone distale (Z'), exempte de noeud de vibration, s'étend depuis l'extrémité libre distale de l'élément de coupe et jusqu'à la première encoche.Preferably, the notches of the cutting tool are made so as to obtain a vibration of the cutting element in said longitudinal cutting plane (Y, Z), without vibration node formation at least the longitudinal cutting edge of the cutting element, and in a distal zone (Z ') extending from the distal free end of the cutting element and at least three quarters of the length (L'). ) of the cutting element between this distal free end and the first notch. More preferably still, said distal zone (Z '), devoid of vibration node, extends from the distal free end of the cutting element to the first notch.

Plus particulièrement, les moyens de mise en vibration sont conçus pour créer, dans le barreau de l'outil de coupe, des vibrations longitudinales avec une fréquence prédéfinie (f) supérieure à 10KHz, et de préférence supérieure ou égale à 20 KHz.More particularly, the vibrating means are designed to create, in the bar of the cutting tool, vibrations longitudinal with a predefined frequency (f) greater than 10KHz, and preferably greater than or equal to 20 KHz.

Brève description des dessinsBrief description of the drawings

L'invention et ses avantages seront mieux compris à la lecture de la description détaillée qui va suivre, laquelle description est faite uniquement à titre d'exemple non limitatif et non exhaustif de l'invention, et en référence au aux figures annexées parmi lesquelles :

  • la figure 1 est une vue de côté d'un dispositif de coupe vibrant, conforme à une première variante de réalisation de l'invention,
  • les figures 2 et 3 sont respectivement des vues de dessus et de dessous du dispositif de coupe de la figure 1,
  • la figure 4 est une représentation en perspective du dispositif de coupe des figures 1 à 3,
  • la figure 5 représente une déformée (exagérée) de l'outil de coupe des figures 1 à 4,
  • les figures 6 à 12 représentent respectivement les déformées (exagérées) de sept variantes de réalisation d'un outil de coupe, qui ne sont pas conformes à l'invention et dont le comportement vibratoire n'est pas satisfaisant,
  • la figure 13 représente une déformée (exagérée) d'une deuxième variante de réalisation d'un outil de coupe conforme à l'invention,
  • la figure 14 est une vue de côté d'un dispositif de coupe vibrant, conforme à une troisième variante de réalisation de l'invention,
  • les figures 15 et 16 sont respectivement des vues de dessus et de dessous du dispositif de coupe de la figure 14,
  • la figure 17 est une représentation en perspective du dispositif de coupe des figures 14 à 16,
  • la figure 18 représente une déformée (exagérée) d'un outil de coupe comportant les mêmes encoches que l'outil de coupe des figures 14 à 17,
  • la figure 19 représente une déformée (exagérée) d'une quatrième variante de réalisation d'un outil de coupe conforme à l'invention
The invention and its advantages will be better understood on reading the detailed description which follows, which description is made solely by way of nonlimiting and non-exhaustive example of the invention, and with reference to the appended figures among which:
  • the figure 1 is a side view of a vibrating cutting device, according to a first embodiment of the invention,
  • the Figures 2 and 3 are respectively top and bottom views of the cutting device of the figure 1 ,
  • the figure 4 is a perspective representation of the cutting device of Figures 1 to 3 ,
  • the figure 5 represents a (exaggerated) distortion of the cutting tool of the Figures 1 to 4 ,
  • the Figures 6 to 12 respectively represent the (exaggerated) deformations of seven embodiments of a cutting tool, which are not in accordance with the invention and whose vibration behavior is not satisfactory,
  • the figure 13 represents a deformed (exaggerated) of a second variant embodiment of a cutting tool according to the invention,
  • the figure 14 is a side view of a vibrating cutting device according to a third embodiment of the invention,
  • the Figures 15 and 16 are respectively top and bottom views of the cutting device of the figure 14 ,
  • the figure 17 is a perspective representation of the cutting device of Figures 14 to 16 ,
  • the figure 18 represents an (exaggerated) distortion of a cutting tool having the same notches as the cutting tool of Figures 14 to 17 ,
  • the figure 19 represents an (exaggerated) distortion of a fourth variant embodiment of a cutting tool according to the invention

Description détailléedetailed description

On a représenté aux figures 1 à 4, un dispositif de coupe vibrant 1, réalisé conformément à une première variante de réalisation l'invention. Ce dispositif de coupe 1 a la forme générale d'un couteau à main. Il peut avantageusement être utilisé pour trancher manuellement tout type de matériau, et peut notamment, mais pas exclusivement, être utilisé pour la coupe manuelle de produits agro-alimentaires.Representatives Figures 1 to 4 , a vibrating cutting device 1, made according to a first embodiment of the invention. This cutting device 1 has the general shape of a hand knife. It can advantageously be used to manually slice any type of material, and may especially, but not exclusively, be used for manual cutting of food products.

Ce dispositif de coupe 1 comporte un outil de coupe monobloc 10 d'axe central longitudinal A, qui est assemblé avec des moyens de mise en vibration 11. Cet outil de coupe monobloc 10 est par exemple en métal, et notamment en acier inoxydable ou en titane.This cutting device 1 comprises a one-piece cutting tool 10 with a longitudinal central axis A, which is assembled with vibrating means 11. This one-piece cutting tool 10 is made of metal, for example stainless steel or aluminum. titanium.

L'outil de coupe monobloc 10 comporte un barreau 100 et une lame de coupe plate 102, qui est située dans le prolongement du barreau 100, et est reliée au barreau 100 par une zone de jonction 101. La lame de coupe 102 définit un plan de coupe longitudinal référencé (Y, Z) sur les figures 1 à 4. Ce plan de coupe longitudinal (Y, Z) correspond au plan médian longitudinal de la lame 102, et est perpendiculaire au plan transversal (X ,Y) parallèle à la section transversale du barreau 100.The one-piece cutting tool 10 comprises a bar 100 and a flat cutting blade 102, which is located in the extension of the bar 100, and is connected to the bar 100 by a junction zone 101. The cutting blade 102 defines a plane longitudinal section referenced (Y, Z) on the Figures 1 to 4 . This longitudinal section plane (Y, Z) corresponds to the longitudinal median plane of the blade 102, and is perpendicular to the transverse plane (X, Y) parallel to the cross section of the bar 100.

Dans l'exemple particulier illustré, le barreau 100 est de forme cylindrique. Cette forme particulière n'est pas limitative de l'invention, le barreau 100 pouvant présenter une toute autre géométrie en section transversale [plan(X,Y)]) et par exemple une section transversale carrée, rectangulaire, ovale, etc....In the particular example illustrated, the bar 100 is of cylindrical shape. This particular form is not limiting of the invention, the bar 100 may have a completely different cross-sectional geometry [plane (X, Y)]) and for example a square, rectangular, oval cross section, etc. .

A son extrémité proximale 100a opposée à la lame 102, le barreau 100 est fixé solidement aux moyens de mise en vibration 11. Ces moyens de mise en vibration 11 permettent de générer dans le barreau 100 des vibrations longitudinales, c'est-à-dire des vibrations orientées dans la direction parallèle à l'axe longitudinal A du barreau 100. La structure et le fonctionnement de ces moyens de mise en vibration 11 sont connus et ne seront donc pas détaillés. Il est simplement rappelé que ces moyens de mise en vibration 11 comportent de manière usuelle un transducteur piézoélectrique alimenté électriquement, et un élément de couplage entre ce transducteur piézoélectrique et le barreau 100, cet élément de couplage permettant l'amplification des vibrations longitudinales générées par le transducteur piézoélectrique. Dans l'exemple particulier illustré sur les figures 1 à 4, ces moyens de mise en vibration 11 sont avantageusement logés dans un boîtier cylindrique, faisant également office de poignée de préhension pour le dispositif de coupe 1.At its proximal end 100a opposite to the blade 102, the bar 100 is firmly fixed to the vibrating means 11. These vibrating means 11 make it possible to generate longitudinal vibrations in the bar 100, that is to say vibrations oriented in the direction parallel to the longitudinal axis A of the bar 100. The structure and operation of these vibrating means 11 are known and therefore will not be detailed. It is simply recalled that these means of Vibration 11 comprises in the usual manner an electrically powered piezoelectric transducer, and a coupling element between this piezoelectric transducer and the bar 100, this coupling element allowing the amplification of the longitudinal vibrations generated by the piezoelectric transducer. In the particular example illustrated on Figures 1 to 4 these vibrating means 11 are advantageously housed in a cylindrical casing, also acting as a gripping handle for the cutting device 1.

La lame de coupe 102 est formée dans une plaque de longueur (L), de largeur (I) et de faible épaisseur (e). En référence aux figures 2 et 3, l'épaisseur (e) de la lame 102 est inférieure à la dimension D1 du barreau 100 dans le plan transverse (X, Z) qui correspond à ladite épaisseur (e) et qui est perpendiculaire au plan de coupe longitudinal (Y,Z). Cette lame 102 comporte un bord de coupe longitudinal 103 (bord inférieur de la lame sur la figure 1), et un bord longitudinal 106 (bord supérieur de la lame sur la figure 1) diamétralement opposé au bord de coupe longitudinal 103.The cutting blade 102 is formed in a plate of length (L), width (I) and thin (e). With reference to Figures 2 and 3 the thickness (e) of the blade 102 is smaller than the dimension D 1 of the bar 100 in the transverse plane (X, Z) which corresponds to said thickness (e) and which is perpendicular to the longitudinal section plane (Y, Z). This blade 102 has a longitudinal cutting edge 103 (lower edge of the blade on the figure 1 ), and a longitudinal edge 106 (upper edge of the blade on the figure 1 ) diametrically opposed to the longitudinal cutting edge 103.

De préférence, tel qu'illustré, la largeur (I) de la lame [plus grande dimension de la lame 102 dans le plan de coupe longitudinal (Y,Z)] est inférieure ou égale à la dimension D2 correspondante du barreau 100 dans ce même plan, de telle sorte que l'outil de coupe 10 peut être facilement fabriqué par simple usinage avec enlèvement de matière d'un barreau initial qui présente la même section transversale que le barreau 100, et dont la longueur correspond à la longueur totale de l'outil de coupe 10. De préférence également, mais non nécessairement, la lame de coupe 102 est centrée sur le barreau 100 dans le plan transverse (X,Z) (figure 2).Preferably, as illustrated, the width (I) of the blade [largest dimension of the blade 102 in the longitudinal section plane (Y, Z)] is less than or equal to the corresponding dimension D 2 of the bar 100 in this same plane, so that the cutting tool 10 can be easily manufactured by simple machining with removal of material of an initial bar which has the same cross section as the bar 100, and whose length corresponds to the total length of the cutting tool 10. Also preferably, but not necessarily, the cutting blade 102 is centered on the bar 100 in the transverse plane (X, Z) ( figure 2 ).

En référence à la figure 2, la zone de jonction 101 reliant le barreau 100 et la lame de coupe 102 comporte deux parois courbes 101 a qui permettent de réaliser une transition progressive de matière dans le plan (X,Z) entre la dimension D1 en section transversale dans ce plan du barreau 100, et l'épaisseur (e) plus faible de la lame 102. Dans l'exemple particulier illustré, ces deux parois courbes 101 a sont symétriques l'une de l'autre par rapport à l'axe central longitudinal A du barreau 100, cette caractéristique n'étant toutefois pas limitative de l'invention.With reference to the figure 2 , the junction zone 101 connecting the bar 100 and the cutting blade 102 has two curved walls 101a which make it possible to achieve a gradual transition of material in the plane (X, Z) between the dimension D 1 in cross section in this plane of bar 100, and the thickness (e) lower blade 102. In the particular example illustrated, these two curved walls 101 are symmetrical to each other with respect to the longitudinal central axis A of the bar 100, this feature not however being limiting of the invention.

De préférence, mais non nécessairement, le bord longitudinal 103 de la lame, qui forme le bord de coupe, présente un profil courbe sur une portion distale 103a qui s'étend depuis l'extrémité libre distale 102a de la lame 102 (extrémité libre de la lame la plus éloignée du barreau 100). Cette portion courbe distale 103a est la portion de la lame qui est principalement utilisée pour la coupe d'un matériau.Preferably, but not necessarily, the longitudinal edge 103 of the blade, which forms the cutting edge, has a curved profile on a distal portion 103a which extends from the distal free end 102a of the blade 102 (free end of the blade farthest from the bar 100). This distal curved portion 103a is the portion of the blade that is mainly used for cutting a material.

De préférence, mais non nécessairement, le bord de coupe 103 de la lame 102 peut être aminci, au moins dans sa portion distale 103a (figure 1), en sorte de former un bord effilé coupant.Preferably, but not necessarily, the cutting edge 103 of the blade 102 may be thinned, at least in its distal portion 103a ( figure 1 ), so as to form a sharp tapered edge.

De préférence également, mais non nécessairement, l'extrémité distale 102a de la lame forme sensiblement une pointe, facilitant l'insertion de la lame dans le matériau lors de la découpe.Also preferably, but not necessarily, the distal end 102a of the blade substantially forms a tip, facilitating the insertion of the blade into the material during cutting.

Conformément à une première caractéristique de l'invention, l'outil de coupe 10 comporte une première encoche longitudinale 104 et une deuxième encoche longitudinale 105.According to a first characteristic of the invention, the cutting tool 10 has a first longitudinal notch 104 and a second longitudinal notch 105.

La première encoche 104 est constituée par une découpe qui est réalisée au moins en partie dans le bord longitudinal de coupe 103 de la lame 102. Dans l'exemple particulier illustré, cette découpe 104 est réalisée sur toute l'épaisseur (e) de la lame 102 (figures 3 et 4), et présente un profil longitudinal en forme de U, de longueur I1 [Figure 1/profil de la découpe dans le plan de coupe longitudinal (Y,Z)].The first notch 104 is constituted by a cutout which is made at least partly in the longitudinal cutting edge 103 of the blade 102. In the particular example illustrated, this cutout 104 is made over the entire thickness (e) of the blade 102 ( figures 3 and 4 ), and has a U-shaped longitudinal profile of length I 1 [ Figure 1 / profile of the cut in the longitudinal section plane (Y, Z)].

Dans l'exemple illustré (figure 1), le profil longitudinal en U de la première découpe 104 comporte deux parties courbes 104a et 104b raccordées par une partie centrale 104c, de préférence sensiblement rectiligne. En référence à la figure 1, ce profil longitudinal en U présente un centre de symétrie, les deux parties courbes 104a et 104b ayant les même rayons de courbure et le fond de l'encoche 104 correspondant à la partie centrale 104c précitée formant un plan parallèle à l'axe central longitudinal A. Ceci n'est toutefois pas limitatif de l'invention, ledit profil longitudinal de l'encoche 104 pouvant être asymétrique dans une autre variante.In the illustrated example ( figure 1 ), the longitudinal profile in U of the first blank 104 comprises two curved portions 104a and 104b connected by a central portion 104c, preferably substantially rectilinear. With reference to the figure 1 , this U-shaped longitudinal profile has a center of symmetry, the two curved portions 104a and 104b having the same radii of curvature and the bottom of the notch 104 corresponding to the said central portion 104c forming a plane parallel to the longitudinal central axis A. However, this is not a limitation of the invention, said longitudinal profile of the notch 104 being asymmetrical in another variant.

Dans l'exemple particulier des figures 1 à 4, cette première encoche 104 s'étend longitudinalement dans la partie proximale 102b de la lame de coupe 102, dans la zone de transition 101 et dans la partie distale 100b du barreau. Ce positionnement particulier de la première encoche 104 suivant l'axe longitudinal A n'est pas limitatif de l'invention. Dans une autre variante, la première encoche 104 peut s'étendre longitudinalement uniquement dans le bord longitudinal de coupe 103 de la lame de coupe 102.In the particular example of Figures 1 to 4 this first notch 104 extends longitudinally in the proximal portion 102b of the cutting blade 102, in the transition zone 101 and in the distal portion 100b of the bar. This particular positioning of the first notch 104 along the longitudinal axis A is not limiting of the invention. In another variant, the first notch 104 may extend longitudinally only in the longitudinal cutting edge 103 of the cutting blade 102.

La deuxième encoche 105 est constituée par une découpe qui est réalisée dans le bord longitudinal 106 de lame, diamétralement opposé au bord de coupe 103, et qui est décalée , par rapport à la première encoche 104, suivant l'axe longitudinal A et en direction de l'extrémité distale 102a de lame 102. Dans l'exemple particulier illustré, cette découpe 105 est également réalisée sur toute l'épaisseur (e) de la lame 102 (figures 3 et 4), et présente un profil longitudinal en forme de U, de longueur I2 [Figure 1/profil de la découpe dans le plan de coupe longitudinal (Y,Z)].The second notch 105 is constituted by a cutout which is made in the longitudinal edge 106 of the blade, diametrically opposed to the cutting edge 103, and which is offset, with respect to the first notch 104, along the longitudinal axis A and in the direction of the blade distal end 102a 102. In the particular example illustrated, this cutout 105 is also made over the entire thickness (e) of the blade 102 (FIG. figures 3 and 4 ), and has a U-shaped longitudinal profile of length I 2 [ Figure 1 / profile of the cut in the longitudinal section plane (Y, Z)].

Plus particulièrement, en référence à la figure 1, la deuxième encoche 105 présente, de préférence, un profil longitudinal qui est asymétrique. Ce profil longitudinal asymétrique comporte deux parties courbes 105a et 105b raccordées par une partie centrale 105c, de préférence sensiblement rectiligne. Les deux parties courbes 105a et 105b présentent respectivement deux rayons de courbures Ra et Rb qui sont légèrement différents, et le fond de l'encoche correspondant à la partie centrale 105c précitée forme un plan qui est légèrement incliné par rapport à l'axe central longitudinal A (figure 1/ angle α)More particularly, with reference to the figure 1 the second notch 105 preferably has a longitudinal profile which is asymmetrical. This asymmetrical longitudinal profile comprises two curved portions 105a and 105b connected by a central portion 105c, preferably substantially rectilinear. The two curved portions 105a and 105b respectively have two radii of curvature Ra and Rb which are slightly different, and the bottom of the notch corresponding to the central part 105c above forms a plane which is slightly inclined with respect to the central longitudinal axis AT ( figure 1 angle α)

Dans l'exemple particulier illustré, la deuxième encoche 105 est réalisée dans la partie distale de la lame 102 qui s'étend entre la première encoche 104 et l'extrémité distale 102a de lame 102, les deux encoches 104 et 105 étant espacées l'une de l'autre, suivant l'axe longitudinal A, d'une distance (d) non nulle (figure 1). Dans une autre variante, il est concevable que la deuxième encoche 105 soit certes décalée, par rapport à la première encoche 104, suivant l'axe longitudinal A et en direction de l'extrémité distale 102a de lame 102, mais de telle sorte que les deux encoches se chevauchent sur une partie de leurs longueurs (I1, I2) dans le plan de coupe(Y,Z) ; dans ce cas, la partie courbe 105b proximale de l'encoche 105 se trouve située au droit de l'encoche 104 suivant l'axe Y, et la partie distale courbe 105a de l'encoche 105 est située entre l'extrémité distale 102a de la lame et la partie courbe distale 104a de la première encoche 104.In the particular example illustrated, the second notch 105 is formed in the distal portion of the blade 102 which extends between the first notch 104 and the distal end 102a of blade 102, the two notches 104 and 105 being spaced apart from each other, along the longitudinal axis A, by a distance (d) which is not zero ( figure 1 ). In another variant, it is conceivable that the second notch 105 is indeed offset, with respect to the first notch 104, along the longitudinal axis A and in the direction of the distal blade end 102a, but in such a way that the two notches overlap on part of their lengths (I 1 , I 2 ) in the section plane (Y, Z); in this case, the curved portion 105b proximal of the notch 105 is located at the right of the notch 104 along the Y axis, and the curved distal portion 105a of the notch 105 is located between the distal end 102a of the blade and the distal curved portion 104a of the first notch 104.

En fonctionnement, lorsque les moyens de mise en vibration 11 sont actifs, ils génèrent des vibrations longitudinales à au moins une fréquence (f) prédéfinie permettant d'exciter au moins un mode propre de vibration de l'outil de coupe 10. Cette fréquence d'excitation (f) est fonction de la géométrie de l'outil de coupe 10, et dépend notamment de la longueur L de la lame de coupe 102. De préférence, l'outil de coupe 10, et notamment la lame de coupe 102, est dimensionnée de telle sorte que cette fréquence (f) est supérieure à 10KHz, et plus préférentiellement supérieure à 20KHz, en sorte de rendre les vibrations inaudibles pour l'oreille humaine (vibrations ultrasonores). Les moyens de mise en vibration 11 peuvent également être conçus pour générer des vibrations multifréquences, présentant plusieurs (au moins deux) fréquences différentes.In operation, when the vibrating means 11 are active, they generate longitudinal vibrations at least one predetermined frequency (f) for exciting at least one own mode of vibration of the cutting tool 10. This frequency of excitation (f) is a function of the geometry of the cutting tool 10, and depends in particular on the length L of the cutting blade 102. Preferably, the cutting tool 10, and in particular the cutting blade 102, is dimensioned such that this frequency (f) is greater than 10KHz, and more preferably greater than 20KHz, so as to render the vibrations inaudible to the human ear (ultrasonic vibrations). The vibrating means 11 may also be designed to generate multifrequency vibrations, having several (at least two) different frequencies.

Lesdites vibrations longitudinales se propagent dans le barreau 100 en direction de la lame 102, l'outil 10 faisant office de résonateur. Sous l'effet de ces vibrations, la lame 102 vibre dans son plan de coupe longitudinal (Y,Z), avec un mouvement de vibration comportant deux composantes vibratoires : une composante longitudinale suivant l'axe Z et une composante transversale suivant l'axe Y.Said longitudinal vibrations propagate in the bar 100 in the direction of the blade 102, the tool 10 acting as a resonator. Under the effect of these vibrations, the blade 102 vibrates in its longitudinal section plane (Y, Z), with a vibration movement comprising two vibratory components: a longitudinal component along the Z axis and a transverse component along the axis Y.

Tel que cela apparaît plus clairement sur la figure 5, les deux encoches 104 et 105 permettent d'améliorer le comportement vibratoire de la lame de coupe dans son plan de coupe (Y,Z). On a représenté sur cette figure 4, la déformée de l'outil de coupe 10 lors du fonctionnement des moyens de mise en vibration 11. Cette déformée a été calculée de manière usuelle au moyen d'un logiciel de simulation utilisant une méthode de calcul par éléments finis. Sur cette figure 5, les déformations de l'outil de coupe ont été volontairement exagérées, afin de mieux faire apparaître le comportement vibratoire de l'outil de coupe 10.As it appears more clearly on the figure 5 the two notches 104 and 105 make it possible to improve the vibratory behavior of the cutting blade in its cutting plane (Y, Z). We have shown on this figure 4 , the deformation of the cutting tool 10 during operation of the vibrating means 11. This deformation has been calculated in the usual manner by means of a simulation software using a finite element calculation method. On this figure 5 the deformations of the cutting tool have been deliberately exaggerated, in order to better show the vibratory behavior of the cutting tool 10.

L'amplitude de vibration de l'outil de coupe 10 dans le plan de coupe (Y , Z) (c'est-à-dire la résultante des composantes vibratoires en Y et en Z) n'est pas identique en tout point de l'outil, et notamment en tout point de la lame de coupe 102. On a symbolisé sur la figure 5, ces variations d'amplitude par des zones ayant des remplissages différents, chaque type de remplissage correspondant à une gamme d'amplitudes qui est reportée sur une échelle verticale. En référence à cette échelle d'amplitudes de la figure 5, le remplissage correspondant au bas de l'échelle identifie une région de vibrations d'amplitude quasiment nulle caractéristique d'un noeud de vibration. A l'opposé, le remplissage correspondant au haut de l'échelle identifie une région dans laquelle les amplitudes de vibrations (résultante des composantes vibratoires en Y et en Z) sont maximales.The vibration amplitude of the cutting tool 10 in the cutting plane (Y, Z) (i.e., the resultant of the Y and Z vibratory components) is not identical at every point in the cutting plane. the tool, and in particular at any point of the cutting blade 102. It is symbolized on the figure 5 these amplitude variations by zones having different fillings, each type of filling corresponding to a range of amplitudes which is carried on a vertical scale. With reference to this scale of amplitudes of the figure 5 , the filling corresponding to the bottom of the scale identifies a vibration region of almost zero amplitude characteristic of a vibration node. In contrast, the filling corresponding to the top of the scale identifies a region in which the amplitudes of vibrations (resultant vibratory components in Y and Z) are maximum.

La déformée de la figure 5 permet de montrer que les amplitudes de vibration de la lame 102 sont avantageusement maximales et sensiblement identiques dans toute la partie distale (Z1) de la lame 102 qui s'étend sensiblement entre la deuxième encoche 105 et l'extrémité distale 102a de la lame 102. En outre, sur toute la région Z' du bord de coupe longitudinal 103, qui s'étend entre l'extrémité distale 12a de la lame 102 et le début de la première encoche 104, les amplitudes de vibrations sont importantes, et il n'y pas de formation de noeud de vibration dans cette région au niveau du bord de coupe 103. La qualité de coupe est en conséquence très bonne. Sur cette figure 5, on peut également noter la formation d'une région nodale N (noeud de vibration) dans la lame de coupe 102 ; cependant, cette région nodale N est très peu étendue, et surtout est localisée au niveau du bord longitudinal 106 opposé au bord de coupe 103. Elle n'est donc pas préjudiciable à la qualité de coupe.The distortion of the figure 5 allows to show that the vibration amplitudes of the blade 102 are advantageously maximum and substantially identical throughout the distal portion (Z1) of the blade 102 which extends substantially between the second notch 105 and the distal end 102a of the blade 102 In addition, over the entire region Z 'of the longitudinal cutting edge 103, which extends between the distal end 12a of the blade 102 and the beginning of the first notch 104, the vibration amplitudes are large, and it There is no vibration knot formation in this region at the cutting edge 103. The cutting quality is in very good consequence. On this figure 5 , one can also note the formation of a nodal region N (vibration node) in the cutting blade 102; however, this nodal region N is very small, and especially is located at the longitudinal edge 106 opposite the cutting edge 103. It is not detrimental to the quality of cut.

A titre de comparaison, on a représenté sur les figures 6 à 12, les déformées de six variantes de réalisation d'un outil de coupe vibrant, qui ne sont pas conformes à l'invention, et dont le comportement vibratoire n'est pas satisfaisant.By way of comparison, it has been shown that Figures 6 to 12 , the deformed six embodiments of a vibrating cutting tool, which are not in accordance with the invention, and whose vibration behavior is not satisfactory.

Sur la figure 6, l'outil de coupe se différencie de l'outil de coupe 10 des figures 1 à 4, en ce que son élément de coupe 102' est une lame plate rectangulaire sans encoche.On the figure 6 , the cutting tool is different from the cutting tool 10 of the Figures 1 to 4 , in that its cutting element 102 'is a rectangular flat blade without notch.

Sur la figure 7, l'outil de coupe se différencie de l'outil de coupe 10 des figures 1 à 4, uniquement en ce que la lame de coupe 102 ne comporte pas d'encoche.On the figure 7 , the cutting tool is different from the cutting tool 10 of the Figures 1 to 4 only in that the cutting blade 102 does not have a notch.

Sur la figure 8, l'outil de coupe se différencie de l'outil de coupe 10 des figures 1 à 4, uniquement en ce que la lame de coupe 102 comporte une seule encoche proximale 104.On the figure 8 , the cutting tool is different from the cutting tool 10 of the Figures 1 to 4 only in that the cutting blade 102 has a single proximal notch 104.

Sur la figure 9, l'outil de coupe se différencie de l'outil de coupe 10 des figures 1 à 4, uniquement en ce que la lame de coupe 102 comporte une seule encoche proximale 104', qui est réalisée exclusivement dans la lame 102, et qui ne s'étend pas dans le barreau 100.On the figure 9 , the cutting tool is different from the cutting tool 10 of the Figures 1 to 4 only in that the cutting blade 102 has a single proximal notch 104 ', which is made exclusively in the blade 102, and which does not extend into the bar 100.

Sur la figure 10, l'outil de coupe se différencie de l'outil de coupe 10 des figures 1 à 4, uniquement en ce que la lame de coupe 102 comporte une seule encoche distale 105.On the figure 10 , the cutting tool is different from the cutting tool 10 of the Figures 1 to 4 only in that the cutting blade 102 has a single distal notch 105.

Sur la figure 11, l'outil de coupe se différencie de l'outil de coupe 10 des figures 1 à 4, uniquement en ce que la lame de coupe 102 comporte une encoche distale 105, et une encoche supplémentaire 107 dans le barreau 100.On the figure 11 , the cutting tool is different from the cutting tool 10 of the Figures 1 to 4 only in that the cutting blade 102 has a distal notch 105, and an additional notch 107 in the bar 100.

Sur la figure 12, l'outil de coupe se différencie de l'outil de coupe 10 des figures 1 à 4, en ce que la lame de coupe a la même forme que la lame 102 des figures 1 à 4, mais comporte uniquement une première encoche proximale 104', qui est réalisée exclusivement dans le barreau 100, et qui ne s'étend pas dans la lame 102.On the figure 12 , the cutting tool is different from the cutting tool 10 of the Figures 1 to 4 , in that the cutting blade has the same shape as the blade 102 of Figures 1 to 4 but includes only a first proximal notch 104 ', which is made exclusively in the bar 100, and which does not extend into the blade 102.

Dans les réalisations des figures 6, 7, 8, 9, 10 et 11, on peut noter la formation d'un noeud de vibration important N qui s'étend jusqu'au bord de coupe longitudinal 103 de la lame, et qui de ce fait est préjudiciable à la qualité de la coupe.In the achievements of figures 6 , 7 , 8 , 9 , 10 and 11 it can be noted the formation of an important vibration node N which extends to the longitudinal cutting edge 103 of the blade, and which is therefore detrimental to the quality of the cut.

Dans la réalisation de la figure 12, on peut noter la formation d'une zone Z2 d'amplitudes extrêmement faibles, qui s'étend sur toute la largeur de la lame, et qui est préjudiciable à la qualité de coupe.In the realization of the figure 12 it can be noted the formation of a zone Z2 of extremely small amplitudes, which extends over the entire width of the blade, and which is detrimental to the quality of cut.

En outre, sur les figures 11 et 12, on peut noter que la zone Z1 à l'extrémité de la lame, dans laquelle les amplitudes de vibrations sont maximales, est de manière désavantageuse très peu étendue, et augmente les risques de rupture de la lame dans cette zone distale.In addition, figures 11 and 12 it may be noted that the zone Z1 at the end of the blade, in which the amplitudes of vibrations are maximum, is disadvantageously very small, and increases the risk of rupture of the blade in this distal zone.

On a représenté sur la figure 13, la déformée d'une autre variante de réalisation d'un outil de coupe vibrant, qui est conforme à l'invention. Sur la figure 13, l'outil de coupe se différencie de l'outil de coupe 10 des figures 1 à 4, uniquement par la position longitudinale de la première encoche 104 ; dans cette variante, ladite première encoche 104 s'étend exclusivement dans la lame de coupe 102. Le comportement vibratoire de cette variante est très satisfaisant et comparable à celui de la figure 5.We have shown on the figure 13 , the deformed of another variant embodiment of a vibrating cutting tool, which is in accordance with the invention. On the figure 13 , the cutting tool is different from the cutting tool 10 of the Figures 1 to 4 only by the longitudinal position of the first notch 104; in this variant, said first notch 104 extends exclusively into the cutting blade 102. The vibratory behavior of this variant is very satisfactory and comparable to that of the figure 5 .

On a représenté sur les figures 14 à 17, une autre variante de réalisation de l'invention, qui se différencie de la variante des figures 1 à 4, essentiellement par la mise en oeuvre d'une lame de coupe 102 et d'un barreau 100 plus longs, et par la présence d'une troisième encoche 107. Cette troisième encoche 107 s'étend dans la partie distale du barreau 100, et est réalisée dans une partie du barreau 100 diamétralement opposée au bord de coupe longitudinal 103 de la lame. Cette troisième encoche 107 a ainsi la même orientation que la deuxième encoche distale 105.We have shown on Figures 14 to 17 , another variant embodiment of the invention, which differs from the variant of Figures 1 to 4 , essentially by the implementation of a cutting blade 102 and a longer bar 100, and by the presence of a third notch 107. This third notch 107 extends in the distal portion of the bar 100, and is made in a portion of the bar 100 diametrically opposite the longitudinal cutting edge 103 of the blade. This third notch 107 thus has the same orientation as the second distal notch 105.

On a représenté sur la figure 18, la déformée d'un outil de coupe vibrant, dont la lame 102 présente la même géométrie que la lame des figures 1 à 4, mais qui comporte trois encoches 105, 04 et 107 identiques à celles du dispositif des figures 14 à 17. Dans cette variante, on peut noter la formation de zones nodales N1, N2 et N3 (noeuds de vibration). D'une part, ces zones nodales N1, N2 et N3 sont très peu étendues. D'autre part et surtout les deux zones nodales N1 et N2 sont localisées au niveau du bord 106 opposé au bord de coupe longitudinal 103, et la zone nodale N3 est très éloignée de l'extrémité distale 102a. Les vibrations de la lame 102 au niveau du bord de coupe 103 sont avantageusement importantes et sensiblement homogènes sur une zone Z' très étendue, qui s'étend depuis l'extrémité libre distale 102a de l'élément de coupe 102 et sur une longueur supérieure au trois quart de la longueur L' de l'élément de coupe 102 entre cette l'extrémité libre distale 102a et la première encoche 104.We have shown on the figure 18 , the deformed of a vibrating cutting tool, whose blade 102 has the same geometry as the blade of Figures 1 to 4 , but which has three notches 105, 04 and 107 identical to those of the device of the Figures 14 to 17 . In this variant, it is possible to note the formation of nodal zones N1, N2 and N3 (vibration nodes). On the one hand, these nodal areas N1, N2 and N3 are very small. On the other hand and especially the two nodal areas N1 and N2 are located at the edge 106 opposite the longitudinal cutting edge 103, and the nodal area N3 is very far from the distal end 102a. The vibrations of the blade 102 at the cutting edge 103 are advantageously large and substantially homogeneous over a very wide zone Z 'which extends from the distal free end 102a of the cutting element 102 and over a longer distance. three quarters of the length L 'of the cutting element 102 between this distal free end 102a and the first notch 104.

On a représenté sur la figure 19, la déformée d'un outil de coupe, qui est conforme à l'invention, et qui se différencie de l'outil de coupe des figures 14 à 18, uniquement par le positionnement longitudinal de la première encoche 104. Dans cette variante, ladite première encoche 104 s'étend exclusivement dans la lame de coupe 102. Le comportement vibratoire de cette variante est très satisfaisant.We have shown on the figure 19 , the deformation of a cutting tool, which is in accordance with the invention, and which is different from the cutting tool of Figures 14 to 18 only by the longitudinal positioning of the first notch 104. In this variant, said first notch 104 extends exclusively into the cutting blade 102. The vibratory behavior of this variant is very satisfactory.

L'invention n'est pas limitée aux exemples particuliers de réalisation qui viennent d'être décrits en référence aux figures annexées, mais s'étend à tout dispositif de coupe défini dans les revendications annexées.The invention is not limited to the particular embodiments which have just been described with reference to the appended figures, but extends to any cutting device defined in the appended claims.

En particulier, et de manière non exhaustive, l'invention n'est pas limitée à la géométrie particulière de la lame de coupe 102 des figures annexées, et en particulier au profil courbe particulier du bord de coupe 103 de cette lame 102, ladite lame plate pouvant être d'une manière générale réalisée dans toute plaque de faible épaisseur (e), et le bord de coupe 103 pouvant par exemple être rectiligne sur tout sa longueur ou pouvant présenter un profil curviligne différent de celui des figures annexées.In particular, and in a non-exhaustive manner, the invention is not limited to the particular geometry of the cutting blade 102 of the appended figures, and in particular to the particular curved profile of the cutting edge 103 of this blade 102, said blade flat which may be generally made in any thin plate (e), and the cutting edge 103 may for example be rectilinear over its entire length or may have a curvilinear profile different from that of the accompanying figures.

Plus généralement encore, dans le cadre de l'invention, la lame de coupe 102 peut être remplacée par tout élément de coupe longiligne qui est situé dans le prolongement du barreau 100, qui définit un plan de coupe longitudinal (Y,Z) perpendiculaire au plan (X,Z) de la section transversale du barreau, et dont la dimension (e) en section transversale et dans la direction (Z) perpendiculaire à ce plan de coupe (Y,Z) est inférieure à la dimension (D1) correspondante en section transversale du barreau 100. Par exemple, et de manière non exhaustive, la lame de coupe 102 peut être remplacée par une tige de coupe cylindrique qui présente en section transversale un diamètre plus faible que le diamètre du barreau 100, et qui est reliée au barreau 100 par une zone de transition tronconique.More generally still, in the context of the invention, the cutting blade 102 may be replaced by any elongate cutting element which is located in the extension of the bar 100, which defines a longitudinal sectional plane (Y, Z) perpendicular to the plane (X, Z) of the cross section of the bar, and whose dimension (e) in cross-section and in the direction (Z) perpendicular to this plane of section (Y, Z) is smaller than the dimension (D 1 ) corresponding, for example, and without limitation, the cutting blade 102 can be replaced by a cylindrical cutting rod which has a smaller diameter in cross-section than the diameter of the bar 100, and which is connected to the bar 100 by a frustoconical transition zone.

L'invention n'est pas limitée à la forme et aux dimensions particulières des encoches 104, 105 et 107 en U des figures annexées. Il revient à l'homme du métier d'adapter la forme et les dimensions des encoches 104, 105, 107, les positions longitudinales des encoches 104 et 105 dans la lame 102, et le cas échéant la position longitudinale de l'encoche 107 dans la partie distale 100b du barreau 100, en fonction de la géométrie et des dimensions de l'outil de coupe 10, en sorte d'obtenir au niveau du bord de coupe longitudinal 103, une zone de vibration Z' étendue, qui ne comporte pas de noeud de vibration, et dans laquelle les amplitudes de vibrations sont importantes et de préférence sensiblement homogènes.The invention is not limited to the shape and the particular dimensions of the notches 104, 105 and 107 U of the accompanying figures. It is up to the person skilled in the art to adapt the shape and dimensions of the notches 104, 105, 107, the longitudinal positions of the notches 104 and 105 in the blade 102, and where appropriate the longitudinal position of the notch 107 in the distal portion 100b of the bar 100, depending on the geometry and dimensions of the cutting tool 10, so as to obtain at the longitudinal cutting edge 103, a zone of vibration Z 'extended, which does not include vibration node, and wherein the vibration amplitudes are large and preferably substantially homogeneous.

Dans les variantes de réalisation des figures annexées, l'élément de coupe 102 (lame) comporte un bord longitudinal de coupe 103 qui est relativement fin et de préférence effilé en sorte d'être coupant. Ceci n'est pas limitatif de l'invention. Dans une autre variante de l'invention, le dispositif de coupe peut comporter un autre élément longiligne coupant (fixe ou mobile) apte à coopérer avec l'élément de coupe 102 vibrant et permettant une découpe par cisaillement entre ces deux éléments de coupe. Dans ce cas par exemple, il n'est pas nécessaire que le bord de coupe 103 de l'élément de coupe 102 vibrant soit fin et coupant.In the alternative embodiments of the accompanying figures, the cutting element 102 (blade) has a longitudinal cutting edge 103 which is relatively thin and preferably tapered so as to be sharp. This is not limiting of the invention. In another variant of the invention, the cutting device may comprise another cutting elongate element (fixed or movable) capable of cooperating with the vibrating cutting element 102 and allowing shear cutting between these two cutting elements. In this case for example, it is not necessary that the edge of cut 103 of the cutting element 102 vibrating is fine and cutting.

Claims (15)

Outil de coupe monobloc (10) destiné à être assemblé avec des moyens de mise en vibration (11), en sorte de constituer l'outil de coupe vibrant d'un dispositif de coupe (1), ledit outil de coupe (10) comportant un barreau (100) et un élément de coupe longiligne (102) situé dans le prolongement du barreau (100) et relié au barreau (100) par une zone de transition (101), ledit élément de coupe (102) comportant un bord de coupe longitudinal (103) et définissant un plan de coupe longitudinal (Y,Z) perpendiculaire au plan (X,Z) de la section transversale du barreau, ledit élément de coupe (102) présentant une dimension (e), mesurée suivant l'axe (X) perpendiculaire à ce plan de coupe longitudinal (Y,Z), qui est inférieure à la dimension (D1) de la section transversale du barreau mesurée suivant ce même axe (X), caractérisé en ce qu'il comporte une première encoche (104) qui est réalisée au moins en partie dans le bord de coupe longitudinal (103) de l'élément de coupe (102), et une deuxième encoche (105), qui est réalisée dans une partie (106) de l'élément de coupe (102) diamétralement opposée au bord de coupe longitudinal (103), et qui est décalée par rapport à la première encoche (104), selon l'axe longitudinal (A) de l'élément de coupe (102) et en direction de l'extrémité libre distale (102a) de l'élément de coupe (102).One-piece cutting tool (10) to be assembled with vibrating means (11) so as to constitute the vibrating cutting tool of a cutting device (1), said cutting tool (10) comprising a bar (100) and an elongate cutting element (102) located in the extension of the bar (100) and connected to the bar (100) by a transition zone (101), said cutting element (102) having an edge of longitudinal section (103) and defining a longitudinal sectional plane (Y, Z) perpendicular to the plane (X, Z) of the cross-section of the bar, said cutting element (102) having a dimension (e), measured according to the axis (X) perpendicular to this longitudinal sectional plane (Y, Z), which is smaller than the dimension (D 1 ) of the cross section of the bar measured along the same axis (X), characterized in that it comprises a first notch (104) which is made at least partly in the longitudinal cutting edge (103) of the section (102), and a second notch (105), which is formed in a portion (106) of the cutting element (102) diametrically opposed to the longitudinal cutting edge (103), and which is offset from the first notch (104) along the longitudinal axis (A) of the cutting element (102) and towards the distal free end (102a) of the cutting element (102). Outil de coupe selon la revendication 1, caractérisé en ce que la deuxième encoche (105) est réalisée dans la partie distale de l'élément de coupe (102) qui s'étend entre la première encoche (104) et l'extrémité distale (102a) de l'élément de coupe (102).Cutting tool according to claim 1, characterized in that the second notch (105) is formed in the distal portion of the cutting element (102) which extends between the first notch (104) and the distal end ( 102a) of the cutting element (102). Outil de coupe selon l'une des revendications 1 ou 2, caractérisé en ce que la première encoche (104) s'étend en totalité dans l'élément de coupe (102).Cutting tool according to one of claims 1 or 2, characterized in that the first notch (104) extends completely into the cutting element (102). Outil de coupe selon l'une des revendications 1 ou 2, caractérisé en ce que la première encoche (104) s'étend dans le barreau (100), dans la zone de transition (101) et dans l'élément de coupe (102).Cutting tool according to one of claims 1 or 2, characterized in that the first notch (104) extends in the bar (100), in the transition zone (101) and in the cutting element (102). Outil de coupe selon l'une des revendications 1 à 4, caractérisé en ce qu'il comporte une troisième encoche (107) qui s'étend en tout ou partie dans le barreau (100), et qui est réalisée dans une partie de l'outil de coupe (10) diamétralement opposée au bord de coupe longitudinal (103).Cutting tool according to one of claims 1 to 4, characterized in that it comprises a third notch (107) which extends wholly or partly in the bar (100), and which is made in a part of the cutting tool (10) diametrically opposed to the longitudinal cutting edge (103). Outil de coupe selon l'une des revendications 1 à 5, caractérisé en ce que les première et deuxième encoches (104, 105), et le cas échéant la troisième encoche (107), présentent des profils longitudinaux en forme de U.Cutting tool according to one of claims 1 to 5, characterized in that the first and second notches (104, 105), and if necessary the third notch (107), have U-shaped longitudinal profiles. Outil de coupe selon la revendication 6, caractérisé en ce que le profil longitudinal en U de la deuxième encoche (105) est asymétrique.Cutting tool according to claim 6, characterized in that the U-shaped longitudinal profile of the second notch (105) is asymmetrical. Outil de coupe selon l'une des revendications 1 à 7, caractérisé en ce que l'élément de coupe (102) est constitué par une lame de coupe (102) plate.Cutting tool according to one of claims 1 to 7, characterized in that the cutting element (102) consists of a flat cutting blade (102). Outil de coupe selon l'une des revendications 1 à 8, caractérisé en ce que l'élément de coupe (102) est centré par rapport au barreau (100).Cutting tool according to one of claims 1 to 8, characterized in that the cutting element (102) is centered with respect to the bar (100). Outil de coupe selon l'une des revendications 1 à 9, caractérisé en ce que la plus grande dimension (I) de l'élément de coupe (102), mesurée dans le plan de coupe longitudinal (Y,Z) suivant l'axe (Y) perpendiculaire à l'axe longitudinal (A) de l'élément de coupe (102), est inférieure ou égale à la dimension (D2) de la section transversale du barreau (100) mesurée dans le plan de coupe longitudinal (Y,Z) suivant ce même axe (Y).Cutting tool according to one of Claims 1 to 9, characterized in that the largest dimension (I) of the cutting element (102) measured in the longitudinal section plane (Y, Z) along the axis (Y) perpendicular to the longitudinal axis (A) of the cutting element (102) is less than or equal to the dimension (D 2 ) of the cross-section of the bar (100) measured in the longitudinal sectional plane ( Y, Z) along this same axis (Y). Outil de coupe selon l'une des revendications 1 à 10, caractérisé en ce que la longueur (L) de l'élément de coupe (102) est supérieure à 5 cm, de préférence supérieure à 10 cm, et plus préférentiellement encore supérieure à 20 cm.Cutting tool according to one of claims 1 to 10, characterized in that the length (L) of the cutting element (102) is greater than 5 cm, preferably greater than 10 cm, and more preferably still greater than 20 cm. Dispositif de coupe vibrant (1) comportant un outil de coupe monobloc vibrant et des moyens de mise en vibration (11), caractérisé en ce que l'outil de coupe (10) est conforme à l'une des revendications 1 à 11, et en ce que les moyens de mise en vibration (11) permettent de créer, dans le barreau (100) de l'outil de coupe (10), des vibrations longitudinales, qui sont orientées suivant l'axe longitudinal (A) de l'élément de coupe (102), et qui permettent une mise en vibration de l'élément de coupe (102) dans le plan de coupe longitudinal (Y,Z) de cet élément de coupe (102) et avec au moins une composante vibratoire transversale qui est perpendiculaire à l'axe longitudinal (A) de l'élément de coupe (102).Vibrating cutting device (1) having a cutting tool vibrating monobloc and vibrating means (11), characterized in that the cutting tool (10) is according to one of claims 1 to 11, and in that the vibrating means (11) enable longitudinal vibrations to be created in the bar (100) of the cutting tool (10), which are oriented along the longitudinal axis (A) of the cutting element (102), and which make it possible to in vibration of the cutting element (102) in the longitudinal cutting plane (Y, Z) of this cutting element (102) and with at least one transverse vibratory component which is perpendicular to the longitudinal axis (A) of the cutting element (102). Dispositif selon la revendication 12, caractérisé en ce que les encoches (104, 105,...) de l'outil de coupe (10) sont réalisées en sorte d'obtenir une mise en vibration de l'élément de coupe (102) dans ledit plan de coupe longitudinal (Y,Z), sans formation de noeud de vibration au niveau au moins du bord longitudinal de coupe (103) de l'élément de coupe (102), et dans une zone distale (Z') qui s'étend depuis l'extrémité libre distale (102a) de l'élément de coupe (102) et sur au moins les trois quart de la longueur (L') de l'élément de coupe (102) entre cette l'extrémité libre distale (102a) et la première encoche (104).Device according to Claim 12, characterized in that the notches (104, 105, ...) of the cutting tool (10) are designed to vibrate the cutting element (102). in said longitudinal section plane (Y, Z), without vibrating node formation at least at the longitudinal cutting edge (103) of the cutting element (102), and in a distal zone (Z ') which extends from the distal free end (102a) of the cutting element (102) and over at least three quarters of the length (L ') of the cutting element (102) between this free end distal (102a) and the first notch (104). Dispositif selon la revendication 13, caractérisé en ce que les encoches (104, 105,...) de l'outil de coupe (10) sont réalisées en sorte d'obtenir une mise en vibration de l'élément de coupe (102) dans ledit plan de coupe longitudinal (Y,Z), sans formation de noeud de vibration au moins niveau du bord longitudinal de coupe (103) de l'élément de coupe (102), et dans une zone distale (Z') qui s'étend depuis l'extrémité libre distale (102a) et jusqu'à la première encoche (104).Device according to claim 13, characterized in that the notches (104, 105, ...) of the cutting tool (10) are designed to vibrate the cutting element (102). in said longitudinal section plane (Y, Z), without vibrating node formation at least at the level of the longitudinal cutting edge (103) of the cutting element (102), and in a distal zone (Z ') which extends from the distal free end (102a) to the first notch (104). Dispositif selon l'une des revendications 11 à 14, caractérisé en ce que les moyens de mise en vibration (11) sont conçus pour créer, dans le barreau (100) de l'outil de coupe (10), des vibrations longitudinales avec une fréquence prédéfinie (f) supérieure à 10KHz, et de préférence supérieure ou égale à 20 KHz.Device according to one of Claims 11 to 14, characterized in that the vibrating means (11) are designed to create vibrations in the bar (100) of the cutting tool (10). longitudinal with a predefined frequency (f) greater than 10KHz, and preferably greater than or equal to 20 KHz.
EP08370004A 2007-02-12 2008-02-11 Vibrating cutting device Active EP1955832B9 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0700972A FR2912338B1 (en) 2007-02-12 2007-02-12 VIBRATING CUTTING DEVICE

Publications (3)

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EP1955832A1 true EP1955832A1 (en) 2008-08-13
EP1955832B1 EP1955832B1 (en) 2011-05-18
EP1955832B9 EP1955832B9 (en) 2011-09-21

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EP08370004A Active EP1955832B9 (en) 2007-02-12 2008-02-11 Vibrating cutting device

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EP (1) EP1955832B9 (en)
AT (1) ATE509741T1 (en)
FR (1) FR2912338B1 (en)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
GB2497083A (en) * 2011-11-29 2013-06-05 Kenwood Ltd Blade with vibratory piezoelectric drive for a food processor
US20190168476A1 (en) * 2017-05-25 2019-06-06 Mun Hyun LEE Juicer having improved juicing performance

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US2649860A (en) * 1952-04-07 1953-08-25 John E E Royer Surgical instrument
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US3086288A (en) * 1955-04-20 1963-04-23 Cavitron Ultrasonics Inc Ultrasonically vibrated cutting knives
DE8802255U1 (en) * 1988-02-22 1988-07-21 Haushaltprodukte Vertriebs Gmbh, 5430 Montabaur, De
DE8813657U1 (en) * 1988-10-31 1989-06-08 Juckel, Karl-Heinz, Dipl.-Kaufm., 8000 Muenchen, De
WO2003095028A1 (en) 2002-05-13 2003-11-20 Axya Medical, Inc. Ultrasonic soft tissue cutting and coagulation systems
WO2005084264A2 (en) 2004-02-27 2005-09-15 Ethicon Endo-Surgery, Inc Ultrasonic surgical blade having transverse and longitudinal vibration
FR2874478A1 (en) * 2004-08-26 2006-03-03 Jean Louis Anxoine Knife for cutting stems of e.g. flowers, has knife blade with cut, where stem of flower is placed in cut and knife is pulled in opposite direction of flower so that movement of knife permits to cut stem in tapered manner at specific degrees

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2649860A (en) * 1952-04-07 1953-08-25 John E E Royer Surgical instrument
GB782643A (en) * 1955-03-07 1957-09-11 Gustav Jecker New and improved scalpel
US3086288A (en) * 1955-04-20 1963-04-23 Cavitron Ultrasonics Inc Ultrasonically vibrated cutting knives
DE8802255U1 (en) * 1988-02-22 1988-07-21 Haushaltprodukte Vertriebs Gmbh, 5430 Montabaur, De
DE8813657U1 (en) * 1988-10-31 1989-06-08 Juckel, Karl-Heinz, Dipl.-Kaufm., 8000 Muenchen, De
WO2003095028A1 (en) 2002-05-13 2003-11-20 Axya Medical, Inc. Ultrasonic soft tissue cutting and coagulation systems
WO2005084264A2 (en) 2004-02-27 2005-09-15 Ethicon Endo-Surgery, Inc Ultrasonic surgical blade having transverse and longitudinal vibration
FR2874478A1 (en) * 2004-08-26 2006-03-03 Jean Louis Anxoine Knife for cutting stems of e.g. flowers, has knife blade with cut, where stem of flower is placed in cut and knife is pulled in opposite direction of flower so that movement of knife permits to cut stem in tapered manner at specific degrees

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2497083A (en) * 2011-11-29 2013-06-05 Kenwood Ltd Blade with vibratory piezoelectric drive for a food processor
US20190168476A1 (en) * 2017-05-25 2019-06-06 Mun Hyun LEE Juicer having improved juicing performance
US11479006B2 (en) * 2017-05-25 2022-10-25 Kwanghui Lee Juicer having improved juicing performance

Also Published As

Publication number Publication date
FR2912338A1 (en) 2008-08-15
EP1955832B1 (en) 2011-05-18
ATE509741T1 (en) 2011-06-15
FR2912338B1 (en) 2009-04-03
EP1955832B9 (en) 2011-09-21

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