EP3530425A1 - Outil de coupe pour un dispositif de coupe à ultrasons et dispositif de coupe à ultrasons - Google Patents

Outil de coupe pour un dispositif de coupe à ultrasons et dispositif de coupe à ultrasons Download PDF

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Publication number
EP3530425A1
EP3530425A1 EP18158735.3A EP18158735A EP3530425A1 EP 3530425 A1 EP3530425 A1 EP 3530425A1 EP 18158735 A EP18158735 A EP 18158735A EP 3530425 A1 EP3530425 A1 EP 3530425A1
Authority
EP
European Patent Office
Prior art keywords
cutting tool
cutting
sonotrode
screw
cutting device
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
EP18158735.3A
Other languages
German (de)
English (en)
Other versions
EP3530425B1 (fr
Inventor
Albert Büttiker
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.)
Telsonic Holding AG
Original Assignee
Telsonic Holding AG
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 Telsonic Holding AG filed Critical Telsonic Holding AG
Priority to EP18158735.3A priority Critical patent/EP3530425B1/fr
Publication of EP3530425A1 publication Critical patent/EP3530425A1/fr
Application granted granted Critical
Publication of EP3530425B1 publication Critical patent/EP3530425B1/fr
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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
    • 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
    • B26D1/0006—Cutting members therefor
    • 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
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
    • B26D7/2614—Means for mounting the cutting member

Definitions

  • the invention relates to a cutting tool for an ultrasonic cutting device and ultrasonic cutting device according to the preambles of the independent claims.
  • Ultrasonic cutting devices for cutting textiles, films, rubber compounds, foods, etc. have long been known.
  • the high-frequency ultrasonic vibrations generated by the oscillating unit are used.
  • mechanical, high-frequency vibration energy is transmitted to a cutting tool, for example via a linearly excited vibration system.
  • an alternating voltage generated by a generator is transmitted at an ultrasonic frequency to a vibration system.
  • the oscillating system may consist of a converter, a booster or amplitude transformation piece and a sonotrode.
  • the converter is usually converted by the use of piezoceramics electrical energy into mechanical energy.
  • the vibration is passed on to the sonotrode.
  • the sonotrode also due to its geometric design, converts the output amplitude of the converter or amplitude transformation piece into a working amplitude.
  • the sonotrode is brought into contact with the material to be separated with a cutting tool, for example a blade or a knife.
  • the cutting tool can be made in one piece with the sonotrode.
  • the tool usually includes a cutting end which wears down.
  • the tool can be mounted as a separate part of the sonotrode, it can for Example be screwed on. The tool can then be replaced as a wear part.
  • an axial screw connection can be provided, as used for example in EP 0277823 A1 is shown.
  • the cutting tool must be made of two different materials, and moreover usually the thread material is heavier than the actual tool material.
  • Another possibility for fastening is to attach a slot to the freely oscillating end of the sonotrode into which a fastening end of a cutting tool is inserted.
  • the cutting tool is fixed with a screw, which is guided transversely to the direction of insertion of the tool through the sonotrode.
  • the attachment end either has a hole through which the screw can pass or at least one recess with which it can be brought up to the screw.
  • the attachment end of the tool and the slot in the sonotrode can thereby be shaped so that a large part of the tool rests against the inner surface of the slot, as shown for example in FIG JP2000326291 (A ) is disclosed.
  • the attachment end must form a significant part of the tool, resulting in an increased weight.
  • the publication JP 2010167535 (A ) shows a cutting tool in which the head of the fastening screw is sunk in the sonotrode. Lateral vibrations and noise can be avoided.
  • the position of the cutting tool in the sonotrode is limited in the known ultrasonic cutting devices essentially by the abutment of the attachment end to the screw and by the contact of the attachment end with the walls of the slot. However, this does not determine the position of the tool yet clearly.
  • the cutting tool can slip out of the sonotrode, for example, in case of vibrations or in case of non-uniform loads or execute a rotary movement around the screw.
  • JP2011-125972 and JP2000326291 show sonotrodes in which the slot has a tool shaft adapted to the recess so that the mounting end is mounted in the mounted state from all sides. The tool can then no longer rotate around the screw but still slip out of the slot unless the screw passes through a hole in the mounting end.
  • the tool has a significantly smaller width.
  • a correspondingly wider sonotrode must be made available, which can adversely affect the mass to be moved.
  • the object is achieved by a cutting tool for an ultrasonic cutting device.
  • the cutting tool includes a cutting end and a mounting end for insertion into a Tool holder or a sonotrode.
  • the cutting end is brought into contact with the workpiece to be cut in use. It may have a sharpened tip and / or one or more sharpened edges.
  • the cutting end and the attachment end may be made of different materials.
  • the cutting tool is in one piece and / or made of a material, such as hardened tool steel, tungsten carbide or tungsten.
  • the attachment end in particular the entire cutting tool, is essentially designed as a blade. That is, the attachment end has a body having a smaller extent in one direction than in the directions perpendicular thereto. In a longitudinal direction connecting the cutting end and the attachment end, and in a width direction perpendicular thereto, the attachment end has a larger extent than in a thickness direction perpendicular to these directions. The length and width are thus greater than the thickness of the cutting tool.
  • the cutting tool preferably performs linear oscillation in the longitudinal direction.
  • At least one positive-fit block facing away from at least one blade surface of the attachment end is arranged at the attachment end of the cutting tool.
  • the positive locking block points in particular in the direction of the smallest extension of the attachment ends.
  • at least one interlocking block is provided on both sides.
  • the form-fitting blocks extend in particular from the opposite leaf surfaces.
  • exactly one interlocking block is provided on a sheet surface.
  • it can also be arranged a number of form-fitting blocks on a sheet surface.
  • the interlocking block can interact with a complementary positive connection opening. While usually the cutting tool is fastened only by means of a clamp or screw connection, the interlocking block provides an additional safeguard, which can prevent, for example, the cutting tool from churning and slipping out of the socket on a tool holder or a sonotrode and / or rotating with respect to the socket ,
  • the form-fitting block has in particular a shock surface, with a directional component in the longitudinal direction.
  • the interlocking block is located at the attachment end, in an area where typically clamping forces act on the cutting tool anyway. The vibration of the cutting tool is therefore not disturbed.
  • the at least one positive locking block extends over the entire width of the blade surface. In interaction with a complementary form-fit opening so twisting the Schneidmaschineschws can be prevented. If the interlocking block has a substantially constant cross section across the width, then the mass of the interlocking block is also distributed uniformly over the width of the cutting tool.
  • the at least one positive locking block extends in a direction perpendicular to the longitudinal direction, which connects the cutting end and the attachment end.
  • the Positive locking block can then prevent slipping and turning the cutting tool.
  • the cutting tool can also be pushed laterally in a direction perpendicular to the longitudinal direction in a corresponding receptacle on a tool holder or in a sonotrode.
  • the tight fit also allows cutting with higher amplitudes.
  • the at least one interlocking block may have a bevel at the edge, which facilitates insertion of the cutting tool into a receptacle.
  • Forming blocks can be arranged mirror-symmetrically to each other.
  • two positively locking blocks arranged on opposite leaf surfaces can be mirror-symmetrical to each other.
  • the entire cutting tool is formed with mirror symmetry except for the cutting end.
  • the mirror symmetry exists with respect to at least one plane that is parallel to the longitudinal direction, that is, the direction connecting the cutting end and the attachment end.
  • the mirror symmetry with respect to two mutually perpendicular planes, wherein one of the mirror planes is parallel to the longitudinal direction and the width direction and one of the mirror planes is parallel to the longitudinal direction and the thickness direction.
  • the at least one positive locking block has a trapezoidal cross section.
  • the cross-section preferably results in a plane along the longitudinal direction, which connects the free end and the attachment end, and preferably perpendicular to the width direction, ie in a plane parallel to the thickness direction, in which the attachment end preferably has the smallest extent.
  • the longer baseline abuts the leaf surface and the shorter baseline points away from the leaf surface.
  • the cross section preferably has the shape of an isosceles trapezium.
  • the legs of the trapezium with the leaf surface form an angle of 90 ° or 45 °.
  • the cutting tool can then be made without much effort.
  • a recess is provided at the end of the attachment end, which has in particular in the longitudinal direction. This allows the cutting tool to be brought close to a fastening screw in a sonotrode or in a tool holder.
  • the recess has, for example, a round contour in order to adapt to the round diameter of the screw. Both sides of the recess remain clamping surfaces.
  • the length of the cutting tool is for example between 20 and 30 mm.
  • the width of the cutting tool is for example 7-12 mm.
  • the thickness of the cutting tool is for example 0.05-3mm.
  • the at least one positive locking block extends, for example, 1-3 mm away from the blade surface.
  • the width and / or the thickness of the cutting tool tapers at the transition from the attachment end to the cutting end, preferably the width by 0.5-1 mm and / or the thickness by 0.25-0.45 mm.
  • the object is also achieved by an ultrasonic cutting device with a sonotrode and a cutting tool, in particular as described above.
  • the cutting tool includes a cutting end and a mounting end.
  • the sonotrode has at least one screw hole which serves to receive a screw for fixing the cutting tool to the sonotrode.
  • At least one interlocking block extends away and at the sonotrode at least one complementary form-fitting recess is provided.
  • the interlocking block forms a positive connection with the form-fitting recess when the cutting tool is mounted in the sonotrode.
  • the positive connection acts at least in a longitudinal direction which connects the cutting end and the attachment end.
  • the positive locking block has, in particular, a stop surface with a direction component in the longitudinal direction, and the positive connection opening has, in particular, a stop surface complementary thereto.
  • the interlocking connection clearly defines the position of the cutting tool in the sonotrode, at least with respect to the longitudinal direction.
  • the interlocking block and the form-fitting recess are formed so that a relative angular alignment between the sonotrode and cutting tool with respect to the screw axis is set.
  • positive locking block and the form-fitting recess extend, for example, in a direction perpendicular to the longitudinal direction.
  • the sonotrode may have a contact surface on which the cutting tool is applied and fixed with a screw.
  • the sonotrode has at one end two legs which form a slot into which the attachment end of the cutting tool can be inserted.
  • the at least one complementary form-fitting recess is provided.
  • sonotrode and cutting tools form a symmetrical arrangement.
  • the attachment end of the cutting tool is bordered by the legs of the sonotrode.
  • the attachment end in particular the entire cutting tool, is designed essentially as a blade.
  • Forming blocks preferably extend from the sheet surfaces on both sides, which further preferably have a trapezoidal cross section, as described above.
  • On the inner sides of the legs are complementary positive openings.
  • the slot in the sonotrode is then formed as symmetrical as the attachment end of the cutting tool, which has a favorable effect on the stability of the linear oscillations.
  • the slot at the fixed end of the legs on a widening The length and width of the expansion determines the flexibility of the legs. These are on the one hand allow easy insertion of the cutting tool, on the other hand allow a reliable clamping force can be applied by the screw.
  • the expansion preferably has a rounded inner contour to prevent notches.
  • One of the legs may have less mass than the other leg.
  • the lighter leg on the outside of a flattening, so that the contact surface and the contact between the cutting tool and sonotrode is not affected.
  • the mass difference preferably contributes to the compensation of the weight of the screw head, so that the longitudinal vibration is not disturbed by the asymmetry of a fastening screw which has a thread and a generally thickened head.
  • a leg may have a screw hole with a screw head countersink.
  • the screw head depression contributes to the mass reduction and also compensates for at least a part of the weight of the screw head.
  • the screw hole is provided with screw head depression on a lighter leg.
  • the screw head can then be partially sunk, so that even a remainder of the head protrudes with an outer attack surface for a tool from the sonotrode.
  • At least one screw hole has an internal thread. There is thus no nut necessary for fastening the screw.
  • a screw hole on a heavy one Leg serves to hold the screw, a screw hole on a lighter leg for applying and / or sinking the screw head.
  • the positive locking block and the form-locking recess extend in a direction perpendicular to the longitudinal direction, so that the cutting tool can be inserted laterally into the sonotrode.
  • the ultrasonic cutting device comprises a screw for insertion into the screw holes and for generating a clamping force between the legs.
  • the screw has in particular a head, which preferably has a recess.
  • the head is tapered, in particular conical executed.
  • the screw can then take a firm seat in the screw hole, whereby friction and thus heat development is largely prevented.
  • the screw also preferably has a cylindrical portion which serves for optimum positioning.
  • FIG. 1 shows a cutting tool 1 for an ultrasonic cutting device 10 (see FIG. 5 ) in perspective view.
  • the cutting tool 1 comprises a cutting end 2 and a fixing end 3 for insertion into a tool holder or a sonotrode 11 (see FIG FIG. 5 ).
  • the cutting tool 1 is designed essentially as a blade, wherein the dimensions in the longitudinal direction 25 which connects the cutting end 2 and a fastening end 3 and the width direction 26 perpendicular thereto are greater than the thickness 29 in a thickness direction 27 perpendicular to both directions 25, 26 ,
  • a recess 7 is provided, so that the cutting tool is close to a fastening screw 15 (see FIG. 5 ) can be pushed.
  • FIG. 2 shows the cutting tool 1 in a first plan view perpendicular to the width direction 26 (see FIG. 1 ).
  • the positive locking blocks 4 are arranged mirror-symmetrically to each other. Except for the cutting end 2, the entire cutting tool 1 is mirror-symmetrical with respect to a plane 5 which is parallel to the direction 25 which connects the cutting end 2 and the attachment end 3.
  • the thickness 29 of the cutting tool 1 tapers at a transition 31 from the attachment end 3 to the cutting end 2.
  • the length 35 of the cutting tool 1 is for example 20 to 30 mm.
  • the maximum thickness 29 of the cutting tool 1 is for example 0.05 to 3 mm.
  • FIG. 3 shows the cutting tool 1 in a second plan view.
  • the interlocking blocks 4 extend over the entire width 30 of the sheet surface 8. At the edges are bevels 33, which are the insertion of the positive locking blocks 4 in the Form gleichausEnglishept 17 (see FIG. 5 ) facilitate.
  • the width of the cutting tool 1 tapers at the transition 31 from the attachment end 3 to the cutting end 2.
  • the maximum width 30 of the cutting tool (1) is 7 to 12 mm.
  • FIG. 4 shows a mounting end 3 in a sectional view.
  • the symmetrically arranged positive locking blocks 4 each have a cross section 6 in the form of a trapezoid.
  • One side edge 9 defines the direction of an impact surface 28 (see FIG. 3 ) with a component which points in the longitudinal direction 25.
  • a complementary surface not shown in the figure creates a positive connection, which prevents slipping and twisting of the cutting tool.
  • FIG. 5 shows an ultrasonic cutting device 10 in a perspective view.
  • the ultrasonic cutting apparatus 10 includes a cutting tool 1 as shown in FIGS Figures 1-4 is shown and a sonotrode 11.
  • a screw 15 is provided for fixing the cutting tool 1.
  • the form-fitting blocks 4 of the cutting tool form a positive connection with complementary form-fitting recesses 17 on the sonotrode 11.
  • the sonotrode 11 has at one end two legs 12a, 12b, which form a slot 13, in which the attachment end 3 of the cutting tool 1 in a insertion direction 34, which corresponds to the width direction 26 (see FIG. 1 ), is insertable.
  • FIG. 6 shows a free end of a sonotrode 11 in a first plan view.
  • the positive engagement recesses 17 are provided on the inner sides 16 of the legs 12a, 12b.
  • the slot 13 has at the fixed ends of the legs 12a, 12b an expansion 18, which has a rounded inner contour 19.
  • One of the legs 12a has on the outer side a flattening 20, and thus has less mass than the other leg 12b. With a screw inserted 15 (balde FIG. 5 ) so the weight of the screw head 23 (see FIG. 8 ) compensated.
  • FIG. 7 shows the free end of the sonotrode 11 in a sectional view.
  • screw holes 14a, 14b are arranged for receiving a screw 15 (see FIG. 5 ), which provides a clamping force of the legs 12a, 12b.
  • a conical screw head countersink 21 is additionally provided, which merges into a cylindrically shaped recess 36.
  • the shape of the screw hole 14a allows accurate centering and positioning of the screw.
  • the screw hole 14b on the heavier leg 12b has an internal thread 22.
  • FIG. 8 shows a fastening screw 15 in a sectional view.
  • the screw 15 has a head 23 in which a recess 24 is provided. At the end of the fastening screw 15, which is opposite the head 23, an external thread 31 is provided.
  • the screw 15 has a conically shaped portion 37, which merges into a cylindrical portion 38. The screw 15 can thus be well centered and positioned.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Knives (AREA)
EP18158735.3A 2018-02-27 2018-02-27 Outil de coupe pour un dispositif de coupe à ultrasons et dispositif de coupe à ultrasons Active EP3530425B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP18158735.3A EP3530425B1 (fr) 2018-02-27 2018-02-27 Outil de coupe pour un dispositif de coupe à ultrasons et dispositif de coupe à ultrasons

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18158735.3A EP3530425B1 (fr) 2018-02-27 2018-02-27 Outil de coupe pour un dispositif de coupe à ultrasons et dispositif de coupe à ultrasons

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EP3530425A1 true EP3530425A1 (fr) 2019-08-28
EP3530425B1 EP3530425B1 (fr) 2020-10-28

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0277823A1 (fr) 1987-02-04 1988-08-10 Taga Electric Co. Ltd. Dispositif de coupe à ultrasons
JP2000326291A (ja) 1999-05-19 2000-11-28 Sonotec Co Ltd 処理刃ホルダー
EP1525961A1 (fr) * 2003-10-20 2005-04-27 Kraft Foods Holdings, Inc. Dispositif pour couper a l'aide des ultrasons
JP2010167535A (ja) 2009-01-23 2010-08-05 Sonotec Co Ltd 加工具ホルダー
JP2011125972A (ja) 2009-12-18 2011-06-30 Seidensha Electronics Co Ltd 超音波カッター装置
WO2011130024A1 (fr) * 2010-04-12 2011-10-20 Branson Ultrasonics Corporation Système ultrasonique et procédé de découpe de matériaux mous et lame de cornet à ultrasons associée

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0277823A1 (fr) 1987-02-04 1988-08-10 Taga Electric Co. Ltd. Dispositif de coupe à ultrasons
JP2000326291A (ja) 1999-05-19 2000-11-28 Sonotec Co Ltd 処理刃ホルダー
EP1525961A1 (fr) * 2003-10-20 2005-04-27 Kraft Foods Holdings, Inc. Dispositif pour couper a l'aide des ultrasons
JP2010167535A (ja) 2009-01-23 2010-08-05 Sonotec Co Ltd 加工具ホルダー
JP2011125972A (ja) 2009-12-18 2011-06-30 Seidensha Electronics Co Ltd 超音波カッター装置
WO2011130024A1 (fr) * 2010-04-12 2011-10-20 Branson Ultrasonics Corporation Système ultrasonique et procédé de découpe de matériaux mous et lame de cornet à ultrasons associée

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