EP3875233A1 - Ultraschall-schneidesystem - Google Patents

Ultraschall-schneidesystem Download PDF

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Publication number
EP3875233A1
EP3875233A1 EP21155145.2A EP21155145A EP3875233A1 EP 3875233 A1 EP3875233 A1 EP 3875233A1 EP 21155145 A EP21155145 A EP 21155145A EP 3875233 A1 EP3875233 A1 EP 3875233A1
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EP
European Patent Office
Prior art keywords
ultrasonic
cutting
inert
cutting tool
cutting system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP21155145.2A
Other languages
English (en)
French (fr)
Other versions
EP3875233B1 (de
EP3875233C0 (de
Inventor
François VULCAIN
Thierry Gautier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vulcain M Francois
Sodeva TDS SARL
Original Assignee
Vulcain M Francois
Sodeva TDS SARL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vulcain M Francois, Sodeva TDS SARL filed Critical Vulcain M Francois
Publication of EP3875233A1 publication Critical patent/EP3875233A1/de
Application granted granted Critical
Publication of EP3875233B1 publication Critical patent/EP3875233B1/de
Publication of EP3875233C0 publication Critical patent/EP3875233C0/de
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Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B26D7/086—Means for treating work or cutting member to facilitate cutting by vibrating, e.g. ultrasonically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/25—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member
    • B26D1/26—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis substantially perpendicular to the line of cut
    • B26D1/30—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis substantially perpendicular to the line of cut with limited pivotal movement to effect cut
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/08—Means for actuating the cutting member to effect the cut
    • B26D5/14—Crank and pin means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D2210/00—Machines or methods used for cutting special materials
    • B26D2210/02—Machines or methods used for cutting special materials for cutting food products, e.g. food slicers

Definitions

  • the technical field of the invention is that of ultrasonic cutting, and in particular of agrifood products.
  • the invention relates more particularly to a device for ultrasonic cutting of industrial products, in particular agrifood products, by means of a non-resonant blade.
  • Ultrasonic cutting is a process using an ultrasonic vibrating device setting in motion at high frequency a rigid blade having at least one sharp edge.
  • the ultrasonic vibrations of the rigid blade although of moderate amplitude, have such characteristics (speed, acceleration, frequency of vibration) that the object tends not to adhere to the blade and make it possible to increase the power of blade cut. Consequently, this cutting process is particularly suitable for cutting fragile products that do not tolerate large deformations under the effect of a blade, products rich in fat or sugar and therefore sticky, for cutting into parts of round products, for cutting products of different heights (typically varying between 10 and 120 mm), for cutting products of great thickness (typically from 60 to 200 mm), and again for cutting thin slices (from the order of 2 mm).
  • ultrasonic cutting makes it possible to meet many cutting objectives and constraints.
  • the sharpening operation has the consequence of impacting the vibratory characteristics of the blade and consequently of modifying the resonant frequency of the blade, which generates an imbalance of the electroacoustic assembly.
  • this sharpening operation is not always possible, in particular when the damage to the blade is too great.
  • the cutting machine comprising such an ultrasonic device is dimensioned to operate at a given frequency range, which imposes particular dimensional constraints on the blade.
  • these cutting machines using ultrasonic devices represent a significant investment and have the drawback of being not very versatile since they are generally sized and used for specific applications. Therefore, it may happen that these ultrasonic cutting machines are not suitable for cutting large-sized products.
  • the maximum width of a resonant blade is a function of the resonant frequency. The more frequent increases, the more the width of the blade decreases.
  • the maximum length of a resonant blade is around 400 mm for a titanium alloy blade. Therefore, the cutting of large-sized products requires the juxtaposition of several twin blades which complicates the installation and makes the cutting of large-sized products unsuitable because it is too expensive to put in place.
  • the invention aims to provide a system for cutting industrial products from a non-resonant cutting tool, for cutting agri-food products, which is particularly versatile, easily adaptable depending on the applications and requirements. dimensions of the products to be cut, having improved cutting qualities compared to ultrasonic cutting devices comprising non-resonant cutting tools of the state of the art.
  • the invention also aims to provide a system for cutting industrial products from a non-resonant cutting tool having the efficiency advantages of an ultrasonic cutting device using a resonant cutting tool known from the state of. the technique, while having an economic advantage and ease of implementation compared to ultrasonic cutting devices with resonant cutting tool known from the state of the art.
  • the ultrasonic transmitter may also be called an "ultrasonic transmitter", a term commonly used in the field.
  • the resonant assembly is said to be tuned to the ultrasonic wave if at least one dimension of each element forming the assembly, in general the length, is equal to a multiple of the half-wavelength of the ultrasonic wave. It is also said in this case that the element is resonant with the ultrasonic wave.
  • the cutting tool is said to be inert because it is not tuned, or not resonant, to the ultrasonic wave.
  • the inert cutting tool coupled to the resonant assembly, is vibrated by the resonant assembly, in a vibration according to a bending mode.
  • the ultrasonic vibrating device enables the inert cutting tool to vibrate regardless of the geometric configuration of the inert cutting tool.
  • the inert cutting tool vibrating at an ultrasonic frequency according to a bending mode, makes it possible to reduce the adhesion of the product during the cutting phase and also to improve the quality of cut by a non-stick effect.
  • the flexural vibration also helps to facilitate product separation under the cutting tool wire.
  • the ultrasonic cutting system comprises a means for setting the inert cutting tool in rotation making it possible to generating additional shear stress on the product by rotating said inert cutting tool.
  • the cutting system according to the invention makes it possible to improve the cutting power of an inert cutting tool by proposing a rotation of the inert cutting tool, simultaneously with the ultrasonic vibration, generating a non-stick effect.
  • the cutting system according to the invention using an inert cutting tool advantageously makes it possible to be able to modify the dimensions of the inert cutting tool so as to adjust them to the various formats of the products to be cut.
  • the inert cutting tool can also be sharpened without having a major impact on the vibratory properties of the tool.
  • the cutting tool non-resonant
  • the cutting tool can be interchanged according to the needs and the formats and the nature of the products to be cut while keeping the rest of the ultrasonic cutting system.
  • it is not necessary to provide an ultrasonic cutting system per type of inert cutting tool, which can represent an interest and an economic advantage.
  • the cutting system according to the invention advantageously combines an ultrasonic vibration of the inert cutting tool as well as a rotation of the inert cutting tool so as to mechanically generate an additional shearing force on the products to be cut to increase the cutting power of the inert cutting tool.
  • Cutting power relates the ability to cut a product as a function of the force exerted on the inert cutting tool.
  • the increased cutting power means that less force is sufficient to cut the product.
  • the ultrasonic cutting system may have one or more additional characteristics among the following, considered individually or according to any technically possible combination.
  • the resonant assembly comprises a first resonant element configured to vibrate according to a first traction / compression mode and a second resonant element. configured to vibrate according to a second mode of traction / compression, the inert cutting tool being positioned between the first resonant element and the second resonant element.
  • the first resonant element is an ultrasonic amplifier.
  • the ultrasonic amplifier can also be called a "booster" in English.
  • the ultrasonic amplifier has an amplification ratio greater than or equal to 1.
  • the ultrasonic amplifier resonating with the ultrasonic wave, transmits and amplifies the amplitude of the ultrasonic wave and therefore of the vibration according to the direction of propagation.
  • the amplitude of flexural vibration of the inert cutting tool is increased.
  • the ultrasonic amplifier has an amplification ratio of less than 1.
  • the vibration amplitude of the inert cutting tool is thus reduced, making it possible to reduce the ultrasonic energy transmitted to the product to be cut, in particular in the case where the product is fragile.
  • the second resonant element is a resonant mass.
  • the resonant mass constitutes a means of connection of the resonant assembly with the inert cutting tool.
  • the resonant mass also makes it possible to optimize the recentering of the passband of the resonant assembly around the frequency of the ultrasonic wave. Thus, the efficiency of vibrating the inert cutting tool is improved.
  • the ultrasonic transmitter is a piezoelectric transducer generating the ultrasonic wave the frequency of which is between 20 kHz and 100 kHz, preferably between 20 kHz and 40 kHz.
  • the ultrasonic cutting system comprises a cutting support, the rotating means being fixed to the cutting support.
  • the cutting support provides a reaction to the shear stress applied by the inert cutting tool during the cutting phase.
  • the cutting support comprises a protective coating on an upper part, resistant to cutting and to the heat given off by the bending vibration of the inert cutting tool.
  • the protective coating of the cutting support is made of silicone or polyurethane with high mechanical strength.
  • the rotating means is positioned near a first end of the inert cutting tool so as to allow a pivot movement along an axis of rotation.
  • the pivot movement provides leverage.
  • the lever achieves an increased shear stress which would not be attainable by the force of the operator alone if the inert cutting tool were to describe a vertical translation. Thus the operator will be able to cut hard products, ie products with a high shear modulus.
  • the ultrasonic device is located on the inert cutting tool near the axis of rotation.
  • the apparent weight of the inert cutting tool is reduced, facilitating the handling of the inert cutting tool by the 'operator.
  • the ultrasonic device is located on the inert cutting tool at a distance from the axis of rotation.
  • the weight of the vibrator is involved in the leverage effect and results in a higher shear stress for the inert cutting tool.
  • the axis of rotation is substantially parallel to the direction of propagation of the ultrasonic wave.
  • the rotating means comprises a support part configured to provide a pivot connection with a rotating shaft, the rotating means comprising an interface part coupled to the rotating shaft. rotating shaft and attached to the inert cutting tool, the interface piece being configured to reflect the bending vibration of the inert cutting tool.
  • the interface part is made of stainless steel.
  • the inert part reflecting the vibration of the inert cutting tool, reduces the dissipation of ultrasonic energy in the rotating means, the greater part of the ultrasonic energy being thus used for the vibration of the machine. inert cutting tool.
  • the rotating means comprises a gripping means, positioned near a second end of the inert cutting tool.
  • the rotating means comprises a mechanical device, such as a jack or a motor, configured to apply a mechanical torque to the inert cutting tool.
  • the torque applied by the mechanical device makes it possible to assist the operator in handling the inert cutting tool and thus to achieve higher shear stresses.
  • the mechanical device can also make it possible to reduce the weight of the inert cutting tool in order to relieve the operator raising the inert cutting tool at the end of a cutting phase or to position the product.
  • the resonant assembly and the rotating means are removable.
  • the inert cutting tool is thus removable for sharpening or replacement.
  • the inert cutting tool can also be interchanged, in order to adapt to the type of product to be cut.
  • the inert cutting tool comprises a metal blade the thickness of which is less than or equal to 10 mm.
  • the blade is made of a titanium alloy.
  • the inert cutting tool comprises a first cutting edge.
  • the first cutting edge has a first cutting angle, less than or equal to 10 ° and a first thickness of sharpening wire less than or equal to 0.1 mm.
  • the first cutting edge exerts the shear stress on the product so as to cut the product.
  • the inert cutting tool comprises a second cutting edge, opposite the first cutting edge.
  • the first and second cutting edges make it possible to cut the product in a back-and-forth circular motion, cutting the product above and / or below.
  • the second cutting edge has a second cutting angle, less than or equal to 10 ° and a second thickness of sharpening wire less than or equal to 0.1 mm.
  • the ultrasonic cutting system comprises a means for tensioning the inert cutting tool.
  • the figure 1 shows a top view of an ultrasonic cutting system 101 according to a first embodiment according to the invention, intended to cut a product 1.
  • the ultrasonic cutting system 101 comprises an inert cutting tool 200 and an ultrasonic vibrating device 300.
  • the inert cutting tool 200 is coupled to the resonant assembly 320 so as to vibrate in a bending mode.
  • the ultrasonic cutting system 101 further comprises a rotating means 400 configured to allow a rotational movement of the inert cutting tool 200 along an axis of rotation Y, substantially parallel to the direction of propagation X.
  • the inert cutting tool 200 to be vibrated is for example a thin metal blade, that is to say having a thickness less than or equal to 10 mm, and advantageously between 0.5 mm and 10 mm.
  • the inert cutting tool 200 has a length and a height adapted to the product to be cut, preferably a flattened parallelepipedal shape.
  • the profile of the cutting tool does not influence the bending vibration, so the cutting tool can have a single-sided or bifacial profile.
  • the inert cutting tool 200 has a length of between 200 mm and 1000 mm.
  • the inert cutting tool 200 has a height of between 20 mm and 100 mm.
  • the inert cutting tool 200 is advantageously made of a material having relevant acoustic properties in the implementation of ultrasonic cutting, such as a high modulus of elasticity, for example of titanium alloy.
  • the material can also have physicochemical properties allowing compatible use in the food industry, such as corrosion resistance and a low transfer rate.
  • the inert cutting tool 200 has a first longitudinal end 201 and a second longitudinal end 202.
  • the inert cutting tool 200 also comprises a first flank 210A and a second flank 210B preferably corresponding to the two largest faces of the inert cutting tool 200.
  • the first and the second flank 210A, 210B are partially connected to each other by a first cutting edge 211, stretching from the first end 201 to the second end 202, intended to make the cut in the product 1.
  • the figure 2 shows an enlargement of the first embodiment of the ultrasonic cutting system 101 according to the invention, particularly centered on the device for vibrating by ultrasound 300. Certain elements are not shown so as to improve the clarity of the image. figure 2 .
  • the ultrasonic wave emitted by the ultrasonic transmitter 310 which we will also call “compression wave”, is longitudinal, at a fixed frequency, and propagates in the direction of propagation X.
  • Ultrasonic transmitter 310 is electrically powered by an ultrasonic generator, not shown in the drawings, configured to acoustically vibrate the ultrasonic transmitter at a frequency in the ultrasonic range.
  • the ultrasonic transmitter 310 is configured to vibrate at a frequency between 20 kHz and 100 kHz, preferably between 20 kHz and 40 kHz.
  • the resonant assembly 320 is coupled to the ultrasonic transmitter 310 and is configured to vibrate in resonance with the transmitter at the wave frequency of compression and to transmit this compression wave in the direction of propagation X.
  • the resonant assembly 320 is said to be resonant, or tuned, to the compression wave. Consequently, the resonant assembly 320 has dimensions, advantageously the dimension along the direction of propagation X, which are multiples of the half wavelength of the compression wave. Thus, a mode of vibration, in traction / compression in the direction of propagation X, is established within the resonant element 320.
  • the resonant element 320 comprises a first resonant element and a second resonant element.
  • the first resonant element is an ultrasonic amplifier 330, also called an ultrasonic booster or an ultrasonic booster, configured to amplify the displacement amplitude of the compression wave.
  • An amplification ratio of the ultrasonic amplifier 330 can advantageously be greater than 1 and preferably of the order of 1.5.
  • the amplification ratio of the ultrasonic amplifier 330 can also be less than 1.
  • the ultrasonic amplifier 330 is for example an axially symmetrical part, made of stainless steel or of a titanium alloy. In the exemplary embodiment illustrated in figure 1 and at the figure 2 , the ultrasonic amplifier 330 has a length L B.
  • the length L B of the ultrasonic amplifier 330 along the direction of propagation X is preferably equal to the half-length of the compression wave and makes it possible to tune the ultrasonic amplifier 330 to the compression wave.
  • Ultrasonic transmitter 310 and ultrasonic amplifier 330 are coupled to transmit the compression wave from ultrasonic transmitter 310 to ultrasonic amplifier 330.
  • the second resonant element is a resonant mass 340.
  • the resonant mass 340 has, for example, axial symmetry. In the exemplary embodiment illustrated in figure 1 and the figure 2 , the resonant mass 340 has a length L M.
  • the resonant mass 340 can for example be made of a titanium alloy.
  • the length L M of the resonant mass 340 is preferably equal to the half-length of the compression wave and makes it possible to tune the resonant mass 340 to the compression wave.
  • the length of the compression wave propagating in a titanium alloy is about 25 cm.
  • the length L B of the ultrasonic amplifier 330 and the length L M of the resonant mass 340 granted to the compression wave at 20 kHz are multiples of 12.5 cm.
  • the resonant assembly 320 encloses the inert cutting tool 200 on either side.
  • the resonant assembly 320 makes rigid contact of the ultrasonic amplifier 330 and of the resonant mass 340 on a portion of the cutting tool. inert 200.
  • the ultrasonic amplifier 330 is in rigid contact on the first flank 210A.
  • the resonant mass 340 is in rigid contact on the second flank 210B.
  • the resonant mass 340 is preferably aligned with the ultrasonic amplifier 330 along the direction of propagation X.
  • the compression wave established within the resonant assembly 320 passes through the portion of the inert cutting tool 200 in the direction of the thickness.
  • the contact surface between the amplifier 330 and the first flank 210A also called the span, has a very good flatness so that the compression wave can be transmitted efficiently, without loss.
  • the range between the amplifier 330 and the first flank 210A can be reduced to a few tens of square millimeters in order to facilitate the transmission of the compression wave.
  • the range between the resonant mass 340 and the second flank 210B can also be reduced to a few tens of square millimeters in order to facilitate transmission.
  • the figure 2 presents an example of displacement d at a given instant within the ultrasonic amplifier 330 and the resonant mass 340 along the direction of propagation X.
  • the displacement d describes a curve taking the shape of a sinusoid whose period is equal to the length L B of the ultrasonic amplifier 330 plus the length L M of the resonant mass 340.
  • the positive values of the displacement d signify a displacement in the direction of the direction of propagation X and the negative values of the displacement d signify a displacement in the opposite direction of the direction of propagation X.
  • the ultrasonic amplifier 330 is contracted while the resonant mass 340 is expanded.
  • the propagation of the compression wave in the resonant element 320 imposes continuity between the ultrasonic amplifier 330 and the resonant mass 340, vibrating in phase opposition.
  • the portion of the inert cutting tool 200 clamped in the center of the resonant assembly 320 is driven by the compression wave and moves according to the repeated pulls and compressions of the ultrasonic amplifier 330 and of the resonant mass 340 .
  • the portion of the inert cutting tool 200 undergoes a displacement d in the opposite direction of the direction of propagation X.
  • the portion of the inert cutting tool 200 undergoes a vibration in the direction of X propagation, driven by the compression wave.
  • the vibration of the portion of the inert cutting tool 200 causes a vibration of the inert cutting tool 200 according to a displacement perpendicular to the first and second flanks 210A, 210B.
  • the vibration which we will call bending mode vibration, propagates through the rest of the inert cutting tool 200, depending on the length of the inert cutting tool 200.
  • the inert cutting tool 200 does not need to be tuned (or resonant) for the bending vibration mode to propagate. Thus, the length, thickness and height of the inert cutting tool 200 can be adjusted to the dimensions of the product 1 to be cut.
  • the figure 3 schematically shows a sectional view along a plane II of the first embodiment of the ultrasonic cutting system 101, the plane II being materialized on the figure 5 .
  • the figure 3 shows an enlargement of the first embodiment visible in the figure 2 , particularly centered on the device for vibrating by ultrasound 300. However, certain elements are not shown so as to improve the clarity of the image. figure 3 .
  • the ultrasonic amplifier 330 and the resonant mass 340 are held in contact against the first and second flanks 210A, 210B of the inert cutting tool 200 by means of a first removable attachment 350.
  • the first attachment removable 350 allows the separation of the resonant assembly 320 and the disassembly of the inert cutting tool 200. Thus it is easy to change or remove the inert cutting tool 200.
  • the first removable fixing 350 is for example a stud, passing through the thickness of the inert cutting tool 200, fixed in two housings each made in the ultrasonic amplifier 330 and the resonant mass 340.
  • the inert cutting tool 200 can have an opening 220 through which the first removable attachment 350 can pass through.
  • the first removable attachment 350 can also be integral with the inert cutting tool 200 without the disassembly of the resonant assembly 320 being made impossible, the ultrasonic amplifier 330 and the resonant mass 340 being attached to the first. removable fixing 350.
  • the handling of the inert cutting tool 200 can be carried out by means of a flange 430.
  • the flange 430 can for example be fixed to the resonant assembly 320.
  • the flange 430 is advantageously arranged at level d 'a vibration node so as to reduce the propagation of the compression wave in the flange 430.
  • the flange 430 may for example include a ring 490 bearing on a bearing 480 made in the flange 430, minimizing the contact surface between the flange 430 and the resonant assembly 320.
  • the flange 430 can advantageously comprise two parts held by two screws so as to make it removable.
  • the figure 4 schematically shows, in top view, the first embodiment of the ultrasonic cutting system 101 also presented in the figure 1 .
  • the figure 4 presents in particular an enlargement of the ultrasonic cutting system 101 centered on the axis of rotation Y.
  • the rotating means 400 comprises a support part 420 and a rotation shaft 460.
  • the support part 420 and the rotation shaft 460 are configured to provide a pivot connection through which the axis of rotation Y passes.
  • the inert cutting tool 200 is coupled to the rotation shaft 460, thus allowing a rotation around the support part 420 to be described.
  • the rotating means 400 includes an interface part 410.
  • the inert cutting tool 200 is coupled to the rotating shaft 460 by means of the part. interface 410.
  • the interface piece 410 provides a mechanical connection with the inert cutting tool 200 and also allows the disassembly of the inert cutting tool 200.
  • the interface piece 410 is disposed near the first end 201 of the inert cutting tool 200.
  • the acoustic impedance and the dimensions of the interface piece 410 are chosen so as to promote the reflection of the vibration. in bending within the inert cutting tool 200. Thus the bending vibration does not dissipate in the rotation shaft 460 and the support part 420 or other adjoining elements.
  • the contact surface between the interface piece 410 and the inert cutting tool 200 is of the order of a few square centimeters.
  • the interface part 410 can also be made of a material having a high acoustic impedance, such as for example stainless steel.
  • the interface part 410 can also have good thermal resistance so that it does not deform as a result of the heating generated by the friction during the propagation of the bending vibration.
  • the interface part 410 is made of a material having a melting point greater than 500 ° C.
  • the inert cutting tool 200 can thus achieve a complete or partial rotation around the axis of rotation Y.
  • the complete rotation allows for example a rotary cutting of a plurality of products 1, each product 1 being, for example, arranged around the axis of rotation Y at a distance from the axis of rotation Y less than the length of the inert cutting tool 200.
  • the figure 5 shows a side view of the first embodiment of the ultrasonic cutting system 101.
  • the ultrasonic cutting system 101 comprises in particular a cutting support 500, not shown in the preceding figures.
  • the cutting support 500 may include a flat surface on which the product 1 is placed, making it possible to support the product 1 during the cutting phase.
  • the cutting support 500 comprises a protective coating on the upper part.
  • the protective coating is resistant to the cutting force and to the heat generated by the bending vibration of the inert cutting tool 200.
  • the protective coating may for example be made of silicone or be a polyurethane strip of high mechanical strength.
  • the support part 420 is fixed to the cutting support 500.
  • the term “lower” will denote the movement which, following the white arrow on the figure 5 , brings the inert cutting tool 200 closer to the cutting support 500.
  • the term “up” will denote the reverse movement.
  • the cutting edge 211 is advantageously facing the cutting support 500 so as to penetrate into the product 1 when the inert cutting tool 200 is lowered.
  • the ultrasonic cutting system 101 may include a gripping means 440 is arranged near the second end 202 of the inert cutting tool 200, making it possible to put the cutting tool. inert cup 200 rotating around the Y axis.
  • the gripping means 440 may be a handle that the operator can grip.
  • the gripping means 440 is fixed to the flange 430.
  • the inert cutting tool 200 rotating around the Y axis, offers a leverage effect making it possible to increase the shear stress on the product to be cut 1.
  • the leverage effect is notably characterized by a ratio of the distances between a first distance and a second distance, the ratio of the distances being advantageously strictly greater than 1.
  • the first distance is defined between the axis of rotation Y and the gripping means 440 and the second distance is defined between the axis of rotation Y and the position of the product 1.
  • a shear stress exerted by the cutting edge 211 penetrating into the product 1 is equal to a force exerted by the operator on the gripping means 440 multiplied by the ratio of the distances.
  • the closer the product is positioned to the Y axis of rotation the greater the leverage effect.
  • the first cutting edge 211 has a low cutting angle, less than 10 ° and a sharpening wire thickness less than or equal to 0.1 mm.
  • the cutting edge 211 can also include machined elements increasing the cutting power, such as micro-teeth.
  • the ultrasonic cutting system 101 comprises a tensioning means 600 making it possible to exert a mechanical tension F on the inert cutting tool 200, according to the length of the inert cutting tool 200.
  • the mechanical tension F can be applied between the support part 420 and the flange 430.
  • the mechanical tension F makes it possible to reduce the torsion of the inert cutting tool 200 during the cutting phase.
  • the mechanical tension F can also contribute to reducing the bending amplitude of the inert cutting tool 200, in particular when the product 1 is fragile and when the bending amplitude is liable to degrade the surface condition of the sections of the product. 1.
  • the mechanical tension F can also help to reduce the mechanical deformation of the inert cutting tool 200 during cutting of a product 1, improving the cutting quality.
  • the tensioning means 600 can for example be a C-shaped frame coupled to the support piece 420 and to the flange 430.
  • the tensioning means 600 can also include a screw and a thumbwheel allowing the adjustment to be made. mechanical tension F on the inert cutting tool 200.
  • the rotating means 400 comprises a mechanical device 450 configured to apply a mechanical torque to the inert cutting tool 200.
  • the ultrasonic cutting system 102 is identical to the first exemplary embodiment described above with the exception of the elements which will be described below.
  • the mechanical device 450 can be a hydraulic or pneumatic cylinder or an electric motor.
  • the mechanical device 450 can assist the operator or apply the torque alone to the inert cutting tool 200 during the cutting phase.
  • the mechanical device 450 can also facilitate the handling of the inert cutting tool 200 by the operator, for example to raise the inert cutting tool 200, once the product 1 has been sliced.
  • one end of the mechanical device 450 can be placed near the second end 202 of the inert cutting tool 200, for example on the flange 430.
  • the other end of the mechanical device 450 can be fixed to a rigid element. (not shown in the drawings) relative to the support part 420.
  • the torque exerted by the mechanical device 450 on the flange 430 makes it possible to lower or raise the inert cutting tool 200.
  • the mechanical device 450 can, for example, be a pneumatic cylinder or an electric motor.
  • the figure 8 illustrates a third exemplary embodiment of an ultrasonic cutting system 103 according to the invention.
  • the ultrasonic cutting system 103 is identical to the exemplary embodiments described above with the exception of the elements which will be described below.
  • the inert cutting tool 200 may have a second cutting edge 212.
  • the second cutting edge 211 is opposed to the first cutting edge 212, partially connecting the first and second flanks 210A, 210B and extending from the first end 201 to the end. second end 202 of the inert cutting tool 200.
  • the second cutting edge 212 is intended to cut the product 1.
  • the addition of the second cutting edge 212 makes it possible to cut the product 1 by lowering the inert cutting tool 200 or by raising the inert cutting tool 200. Another possible use is to cut the product 1 according to a movement. reciprocating circular, by making a first section of the product 1 by lowering the inert cutting tool 200 and then making a second section of the product 1 by raising the inert cutting tool 200.
  • the addition of the second cutting edge 212 makes it possible to produce a through cut of the product 1, without the need to resort to a cutting support 500.
  • the second cutting edge 212 has a low cutting angle, less than 10 ° and a sharpening wire thickness less than or equal to 0.1 mm.
  • the cutting edge 212 can also include machined elements increasing the cutting power, such as micro-teeth.
  • a characteristic common to the embodiments presented in the figure 1 to figure 8 is the arrangement of the ultrasonic vibrating device 300.
  • the ultrasonic vibrating device 300 is disposed on the inert cutting tool 200 at a distance from the axis of rotation Y.
  • the ultrasonic vibrating device 300 is disposed on the second end 202 of the inert cutting tool 200.
  • the weight of the ultrasonic vibrator 300 is also a factor in the torque exerted on the inert cutting tool 200 and contributes to the leverage effect in a positive manner.
  • the figure 9 schematically shows a fourth embodiment of the ultrasonic cutting system 104.
  • the ultrasonic cutting system 104 is identical to the exemplary embodiments described above except for the elements which will be described below.
  • the ultrasonic vibrating device 300 is disposed on the inert cutting tool 200 near the axis of rotation Y.
  • the ultrasonic vibrating device 300 is disposed on the first end 201 of the. inert cutting tool 200.
  • the interface piece 410 is advantageously fixed to the flange 430 which serves as a connection means between the rotating means 400 and the inert cutting tool 200.
  • the gripping means 440 advantageously remains fixed. on the flange 430 so that the bending vibration within the inert cutting tool 200 is not transmitted to the operator.
  • the operator can more easily handle and reassemble the inert cutting tool 200.
  • the figure 10 schematically represents a fifth embodiment of the ultrasonic cutting system 105.
  • the ultrasonic cutting system 105 is identical to the exemplary embodiments described above with the exception of the elements which will be described below.
  • the support piece 420 is fixed to the cutting support 500 so that the axis of rotation Y is perpendicular to the cutting support 500.
  • the inert cutting tool describes a rotation in a plane parallel to the cutting support 500.
  • This embodiment of the cutting system 105 allows the product 1 to be cut in a section parallel to the cutting support 500.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Turning (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP21155145.2A 2020-03-02 2021-02-04 Ultraschall-schneidesystem Active EP3875233B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2002079A FR3107664B1 (fr) 2020-03-02 2020-03-02 Système de découpe ultrasonore

Publications (3)

Publication Number Publication Date
EP3875233A1 true EP3875233A1 (de) 2021-09-08
EP3875233B1 EP3875233B1 (de) 2023-08-16
EP3875233C0 EP3875233C0 (de) 2023-08-16

Family

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Family Applications (1)

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EP21155145.2A Active EP3875233B1 (de) 2020-03-02 2021-02-04 Ultraschall-schneidesystem

Country Status (2)

Country Link
EP (1) EP3875233B1 (de)
FR (1) FR3107664B1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1463279A (fr) 1966-01-07 1966-12-23 Seni Le Trappeur S A A Nouveau procédé de réalisation de motifs décoratifs sur des articles en cuir ou analogue
EP0712699A1 (de) * 1994-11-15 1996-05-22 Mecamatic Aufschnittschneidvorrichtung zum Schneiden von Pâté en Croûte und von anderen laibförmigen Nahrungsmitteln
EP0813937A2 (de) * 1996-06-17 1997-12-29 Soremartec S.A. Vorrichtung und Verfahren zum Schneiden von Lebensmitteln
EP3037181A1 (de) * 2014-12-23 2016-06-29 Sodeva TDS Ultraschallschneidevorrichtung, insbesondere für lebensmittel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1463279A (fr) 1966-01-07 1966-12-23 Seni Le Trappeur S A A Nouveau procédé de réalisation de motifs décoratifs sur des articles en cuir ou analogue
EP0712699A1 (de) * 1994-11-15 1996-05-22 Mecamatic Aufschnittschneidvorrichtung zum Schneiden von Pâté en Croûte und von anderen laibförmigen Nahrungsmitteln
EP0813937A2 (de) * 1996-06-17 1997-12-29 Soremartec S.A. Vorrichtung und Verfahren zum Schneiden von Lebensmitteln
EP3037181A1 (de) * 2014-12-23 2016-06-29 Sodeva TDS Ultraschallschneidevorrichtung, insbesondere für lebensmittel

Also Published As

Publication number Publication date
FR3107664A1 (fr) 2021-09-03
EP3875233B1 (de) 2023-08-16
EP3875233C0 (de) 2023-08-16
FR3107664B1 (fr) 2022-02-25

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