DE102006020429A1 - Ultrasonic guillotine has fixed anvil surface and cutting tool linked to energy source - Google Patents

Ultrasonic guillotine has fixed anvil surface and cutting tool linked to energy source Download PDF

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Publication number
DE102006020429A1
DE102006020429A1 DE200610020429 DE102006020429A DE102006020429A1 DE 102006020429 A1 DE102006020429 A1 DE 102006020429A1 DE 200610020429 DE200610020429 DE 200610020429 DE 102006020429 A DE102006020429 A DE 102006020429A DE 102006020429 A1 DE102006020429 A1 DE 102006020429A1
Authority
DE
Germany
Prior art keywords
tool
ultrasonic
counter
force
counter tool
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.)
Pending
Application number
DE200610020429
Other languages
German (de)
Inventor
Ulrich Vogler
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.)
Herrmann Ultraschalltechnik GmbH and Co KG
Original Assignee
Herrmann Ultraschalltechnik GmbH and Co KG
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 Herrmann Ultraschalltechnik GmbH and Co KG filed Critical Herrmann Ultraschalltechnik GmbH and Co KG
Priority to DE200610020429 priority Critical patent/DE102006020429A1/en
Priority to EP07003846.8A priority patent/EP1849569B2/en
Priority to US11/730,935 priority patent/US20070251362A1/en
Publication of DE102006020429A1 publication Critical patent/DE102006020429A1/en
Priority to HK07113899A priority patent/HK1105391A1/en
Priority to US12/588,063 priority patent/US20100024956A1/en
Priority to US13/850,358 priority patent/US20130213198A1/en
Pending legal-status Critical Current

Links

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
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/10—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating making use of vibrations, e.g. ultrasonic welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B29C65/083—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil
    • B29C65/085—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil using a rotary sonotrode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/743—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
    • B29C65/7443—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc by means of ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/745—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool
    • B29C65/7451—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool the severing tool and the welding tool being movable with respect to one-another
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/006—Preventing damaging, e.g. of the parts to be joined
    • B29C66/0062—Preventing damaging, e.g. of the parts to be joined of the joining tool, e.g. avoiding wear of the joining tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/816—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8161—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps said pressing elements being supported or backed-up by springs or by resilient material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824—Actuating mechanisms
    • B29C66/8242—Pneumatic or hydraulic drives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824—Actuating mechanisms
    • B29C66/8244—Actuating mechanisms magnetically driven
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/924—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/9261—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the displacement of the joining tools
    • B29C66/92611—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the displacement of the joining tools by controlling or regulating the gap between the joining tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/924—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/9261—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the displacement of the joining tools
    • B29C66/92651—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the displacement of the joining tools by using stops
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/929—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/95—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94
    • B29C66/951—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 by measuring or controlling the vibration frequency and/or the vibration amplitude of vibrating joining tools, e.g. of ultrasonic welding tools
    • B29C66/9513—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 by measuring or controlling the vibration frequency and/or the vibration amplitude of vibrating joining tools, e.g. of ultrasonic welding tools characterised by specific vibration frequency values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81415—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled
    • B29C66/81417—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled being V-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/87—Auxiliary operations or devices
    • B29C66/872—Starting or stopping procedures

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

An ultrasonic assembly subjects a work piece to ultrasonic emissions while it is positioned between an anvil plate and another tool. The ultrasonic sonotrode emitter is attached to a rider whose orientation and direction of travel may be altered with respect to the tool. The tool is coupled to an energy source that drives (FS) it towards the sonotrode. Also claimed is a commensurate operating process. The energy source is a mechanical spring, pneumatic, a hydraulic spring or an electromagnet.

Description

Die Erfindung betrifft eine Vorrichtung zum Bearbeiten von Werkstücken mittels Ultraschall, mit einem Ultraschallschwinggebilde und einem Amboss mit einem Gegenwerkzeug, wobei das Ultraschallschwinggebilde eine Ultraschallsonotrode aufweist, die über einen Schlitten in deren Achsrichtung und in Richtung des Gegenwerkzeugs verfahrbar ist.The The invention relates to a device for machining workpieces by means Ultrasound, with an ultrasonic oscillator and an anvil with a counter tool, wherein the ultrasonic vibrating an ultrasonic sonotrode that has over a carriage in the axial direction and in the direction of the counter tool is movable.

Vorrichtungen zum Bearbeiten von Werkstücken sind bekannt aus der EP-A-1 108 494, der EP-A-1 466 709, der DE-A- 696 21 134, der DE-U-295 07 068, der DE-A-35 29 686, der DE-A-197 16 018, der WO-A-96 109 919, der EP-A-1 112 823, der DE-A-195 81 256, der DE-A-44 39 284, der WO-A-96 014 202, der DE-A-10 2004 013 050, der DE-A-10 2004 013 049 und der DE-U-202 06 561. Mit derartigen Vorrichtungen können Thermoplaste, Fliese, Papiere und dergleichen bearbeitet, insbesondere geschnitten werden. Das Ziel ist dabei, durch Einsatz von Ultraschall, die Schneidkräfte zu reduzieren und/oder die Schnittkante zu optimieren.devices for machining workpieces are known from EP-A-1 108 494, EP-A-1 466 709, DE-A- 696 21 134, DE-U-295 07 068, DE-A-35 29 686, DE-A-197 16,018, WO-A-96 109 919, EP-A-1 112 823, DE-A-195 81 256, DE-A-44 39 284, WO-A-96 014 202, DE-A-10 2004 013 050, DE-A-10 2004 013 049 and DE-U-202 06 561. With such Devices can Thermoplastics, tile, papers and the like edited, in particular get cut. The goal is to use ultrasound the cutting forces to reduce and / or optimize the cutting edge.

Eine bekannte Technik ist der freie Schnitt, bei dem ein Ultraschallwerkzeug als Schneidwerkzeug ausgebildet ist und eine Materialbahn oder ein Werkstück ohne Gegenwerkzeug geschnitten wird. Dabei bewegt sich das als Ultraschallmesser ausgebildete Ultraschallwerkzeug relativ zum Werkstück in Richtung der Schneidlinie. Das Ultraschallwerkzeug kann auch als rotierendes Messer ausgebildet sein. In diesem Fall wird zusätzlich noch eine Rotationsbewegung ausgeführt. Dieser freie Schnitt kommt hauptsächlich beim Schneiden von Gewebebahnen zum Einsatz. Die Schneidkraft resultiert bei diesem Verfahren hauptsächlich aus der Schnittgeschwindigkeit, der Schneidgeometrie, dem Schnittwinkel und dem Werkstück selbst.A well-known technique is the free cut, where an ultrasonic tool is designed as a cutting tool and a material web or a workpiece without Counter tool is cut. It moves as an ultrasonic knife trained ultrasonic tool relative to the workpiece in the direction the cutting line. The ultrasonic tool can also be used as a rotating Knife be formed. In this case, in addition, a rotation movement executed. This free cut is mainly used when cutting fabric webs Commitment. The cutting force mainly results in this process the cutting speed, the cutting geometry, the cutting angle and the workpiece even.

Eine weitere bekannte Technik ist der geformte Schnitt mit einem Gegenwerkzeug, bei dem zusätzlich ein Schneiddruck zwischen dem Ultraschallwerkzeug und dem Gegenwerkzeug aufgebaut wird. Auf diese Weise können nahezu beliebig hohe Schneidkräfte erzeugt werden. Die erforderliche Schneidkraft wird entweder durch eine kraftabhängige Zustellbewegung erzeugt oder über einen festen Spalt zwischen dem Ultraschallwerkzeug und dem Gegenwerkzeug. Durch diesen Spalt wird das zu bearbeitende Werkstück hindurchgezwängt.A Another known technique is the shaped cut with a counter tool, in addition a cutting pressure between the ultrasonic tool and the counter tool is built. In this way almost any high cutting forces can be generated become. The required cutting force is either by a force-dependent Delivery movement generated or over a fixed gap between the ultrasonic tool and the counter tool. Through this gap, the workpiece to be machined is forced through.

Eine weitere Technik ist der kontinuierlich geformte Schnitt. Hierbei kann das Ultraschallwerkzeug so ausgeführt sein wie beim freien Schnitt, zum Beispiel als Ultraschallmesser. Aber es wird eine zusätzliche Kraft auf das zu bearbeitende Werkstück ausgeübt, indem das Werkstück zwischen das Ultraschallmesser und das Gegenwerkzeug gedrückt wird. Der Schneiddruck erhöht sich dabei erheblich. Das Gegenwerkzeug kann dabei als einfache Platte oder als rotierender Zylinder ausgebildet sein. Ebenso ist es möglich, das Ultraschallwerkzeug ohne Schneidgeometrie auszuführen und die Schneidgeometrie in das Gegenwerkzeug zu legen.A Another technique is the continuously shaped cut. in this connection the ultrasonic tool can be made as in the free cut, for example as an ultrasonic knife. But it will be an extra Force applied to the workpiece to be machined by the workpiece between the ultrasonic knife and the counter tool is pressed. The cutting pressure elevated considerably. The counter tool can be as simple Plate or be designed as a rotating cylinder. Likewise is it is possible to carry out the ultrasonic tool without cutting geometry and Place the cutting geometry in the counter tool.

Eine weitere bekannte Technik besteht darin, eine getakteten geformten Schnitt auszuführen. Dabei wird zyklisch zwischen dem Ultraschallwerkzeug und dem Gegenwerkzeug eine Schneidkraft aufgebaut. Dabei kann die Schneidgeometrie im Ultraschallwerkzeug und/oder im Gegenwerkzeug vorgesehen sein. Das Werkstück wird bei diesem Verfahren eindimensional, zweidimensional oder sogar dreidimensional bearbeitet. Zusätzlich und überlagert zur Schnittkraft wird auf das Werkstück und auf das Gegenwerkzeug eine Schwingungsamplitude des Werkzeugs mit einer vorgegebenen Resonanzfrequenz, die zum Beispiel zwischen 20 und 60 kHz beträgt, aufgebracht. Das Ultraschallwerkzeug bewegt sich während des Taktes um einen Verschiebeweg in Richtung des Gegenwerkzeugs. Das Gegenwerkzeug ist in diesem Fall starr eingebaut und führt keine Bewegung durch. Berühren sich das Ultraschallwerkzeug und das Gegenwerkzeug, dann ist das Werkstück in der Regel durchtrennt. Es besteht auch die Möglichkeit, das Ultraschallwerkzeug fest einzuspannen und die Kraft sowie den Verfahrweg vom Gegenwerkzeug ausführen zu lassen. Bei beiden Varianten ist das eine Werkzeug fix eingespannt und die Zustellbewegung und die Schneidkraft wird vom anderen Werkzeug aufgebracht.A Another known technique is to have a clocked shaped Execute cut. This is cyclic between the ultrasonic tool and the counter tool built up a cutting force. The cutting geometry in the Ultrasonic tool and / or be provided in the counter tool. The workpiece becomes one-dimensional, two-dimensional or even three-dimensional in this method processed. additionally and superimposed to Cutting force is applied to the workpiece and on the counter tool a vibration amplitude of the tool with a given resonant frequency, for example, between 20 and 60 kHz, applied. The ultrasonic tool moves during the Clock by a displacement in the direction of the counter tool. The Counter tool is rigidly installed in this case and does not move by. Touch the ultrasonic tool and the counter tool, that's it workpiece usually severed. There is also the option of the ultrasonic tool firmly clamped and the force and the travel distance from the counter tool To run allow. In both variants, a tool is firmly clamped and the feed motion and the cutting force are from the other tool applied.

Es besteht auch die Möglichkeit, den Verfahrweg zu begrenzen. Dies kann zum Beispiel durch einen exakt einstellbaren Endanschlag erfolgen, oder durch genau positionierbare und fixierbare Schlitten, die zum Beispiel von einer Spindel mit Servomotor angetrieben werden. Hierdurch lässt sich ein bestimmter Schweißspalt einstellen. Soll das Werkstück vollständig durchtrennt werden, dann muss dieser Schweißspalt auf Null oder nahezu Null eingestellt werden.It there is also the possibility to limit the travel path. This can be done for example by a exactly adjustable end stop, or by exactly positionable and fixable slide, for example, by a spindle with Servo motor to be driven. This makes it possible to set a specific welding gap. If the workpiece is completely cut through be, then this welding gap set to zero or nearly zero.

Als problematisch hat sich bei diesen Techniken herausgestellt, dass dann, wenn das Werkstück durchtrennt ist, es zu einem Kontakt zwischen dem Ultraschallwerkzeug und dem Gegenwerkzeug kommt. Die Schneidkraft presst die Flächen aufeinander, die mit der vorherrschenden Frequenz von 20 bis 60 kHz aufeinander schlagen. Hierbei entstehen unkontrollierte Kräfte, Bewegungen und Schwingungen, die unter anderem auch hörbar sind. Innerhalb sehr kurzer Zeit verschleißen sowohl das Ultraschallwerkzeug als auch das Gegenwerkzeug, indem Eingrabungen und Verformungen an den Kontaktflächen entstehen. Dieser Verschleiß kann durch härtere Ausführung der Kontaktflächen, zum Beispiel durch eine Beschichtung oder einen härteren Stahl reduziert, jedoch nicht komplett verhindert werden. Jedoch können nicht beliebig viele Materialien beziehungsweise beliebige Härtegrade beim Ultraschallbearbeiten eingesetzt werden, da die verwendbaren Werkstoffe für die Werkzeuge sehr limitiert sind. Die Schnittqualität nimmt mit Zunahme des Verschleißgrades der Werkzeuge stark ab, weshalb dieses häufig gewechselt werden müssen.A problem that has been found in these techniques is that when the workpiece is severed, contact between the ultrasonic tool and the counter tool occurs. The cutting force compresses the surfaces that strike each other at the prevailing frequency of 20 to 60 kHz. This creates uncontrolled forces, movements and vibrations, which are also audible. Within a very short time, both the ultrasonic tool and the counter tool wear out, resulting in burial and deformation at the contact surfaces. This wear can be reduced by harder execution of the contact surfaces, for example by a coating or a harder steel, but not completely prevented. ever However, as many materials or arbitrary degrees of hardness can not be used in ultrasonic machining, since the materials that can be used for the tools are very limited. The quality of cut decreases sharply as the degree of wear of the tools increases, which is why it must be changed frequently.

Elektronische Regelungen sind zur Verminderung des Verschleißes zwar denkbar und auch schon teilweise realisiert. Jedoch kann auch durch eine schnelle Abschaltung des Ultraschalls beziehungsweise eine schnelle Aufhebung der Schnittkraft beziehungsweise ein schnelles Wegfahren des Ultraschallwerkzeugs vom Gegenwerkzeug eine Kontaktierung nicht ausgeschlossen werden. Aufgrund der hohen Frequenz der Ultraschallwerkzeuge kommt es nach wie vor zu einer relativ hohen Anzahl an Kontakten. Wird zum Beispiel mit einer Frequenz von 20 kHz gearbeitet und wird innerhalb von 1 ms die Rückstellbewegung des Ultraschallwerkzeugs eingeleitet, dann kommt es während dieser 1 ms immer noch zu 20 Kontakten zwischen dem Ultraschallwerkzeug und dem Gegenwerkzeug.electronic Regulations are conceivable and even to reduce wear partially realized. However, it can also be fast shutdown of the ultrasound or a rapid cancellation of the cutting force or a fast driving away of the ultrasonic tool from the counter tool a contact can not be excluded. Because of the high Frequency of ultrasonic tools is still one relatively high number of contacts. For example, with a frequency worked from 20 kHz and is within 1 ms, the return movement initiated the ultrasonic tool, then it comes during this 1 ms still to 20 contacts between the ultrasonic tool and the counter tool.

Als problematisch hat sich außerdem herausgestellt, dass eine exakte Einstellung des Ultraschallwerkzeugs zum Gegenwerkzeug das Kontaktierungsproblem nicht löst, da die relative Position der Komponenten zueinander durch eine Vielzahl von Variablen beeinflusst wird. Erwärmt sich zum Beispiel das Ultraschallwerkzeug, so verändert sich die Spalthöhe aufgrund der Ausdehnung, was sich direkt auf die Schnittqualität auswirkt. Andere Variablen sind die Raumtemperatur, die Prozesstemperatur, Kraftschwankungen und so weiter.When In addition, has problematic proved that an exact adjustment of the ultrasonic tool the counter tool does not solve the contacting problem, since the relative position of the components to each other by a variety is influenced by variables. For example, when the ultrasonic tool heats up, so changed the gap height due to the expansion, which directly affects the quality of the cut. Other variables are the room temperature, the process temperature, Force fluctuations and so on.

Der Erfindung liegt die daher die Aufgabe zugrunde, eine Vorrichtung zum Bearbeiten von Werkstücken mittels Ultraschall und/oder ein Verfahren zum Betreiben einer derartigen Vorrichtung bereitzustellen, mit welcher eine bessere Schnittqualität sowie eine längere Standzeit der Werkzeuge erzielt werden kann.Of the Invention is therefore the object of a device for machining workpieces by means of ultrasound and / or a method for operating such To provide apparatus with which a better cut quality as well a longer one Tool life can be achieved.

Diese Aufgabe wird bei einer Vorrichtung zum Bearbeiten von Werkstücken mittels Ultraschall der eingangs genannten Art erfindungsgemäß dadurch gelöst, dass ein Kraftspeicher für das Gegenwerkzeug vorgesehen ist, mit dem das Gegenwerkzeug in Richtung der Ultraschallsonotrode mit einer Kraft beaufschlagt wird.These Task is in a device for machining workpieces by Ultrasound of the aforementioned type according to the invention thereby solved, that a power storage for the counter tool is provided with which the counter tool in the direction the ultrasonic sonotrode is acted upon by a force.

Die erfindungsgemäße Vorrichtung besitzt den wesentlichen Vorteil, dass das Gegenwerkzeug nicht starr gehalten wird, sondern eine Kraft in Richtung der Ultraschallsonotrode ausübt, was bedeutet, dass das Gegenwerkzeug auch ausweichen kann, wenn diese Kraft von der Ultraschallsonotrode überschritten wird. Ändert sich zum Beispiel aufgrund von Temperaturschwankungen der Schneidspalt, dann wird das Gegenwerkzeug entweder nachgeführt oder weicht der Ultraschallsonotrode aus, wodurch zum einen eine hohe Schnittqualität beibehalten wird, zum anderen die Abnutzung an den Arbeitsflächen der Werkzeuge wesentlich vermindert wird.The inventive device has the significant advantage that the counter tool is not rigid but a force is exerted in the direction of the ultrasonic sonotrode, which means that the counter tool can also dodge, if this Force is exceeded by the ultrasonic sonotrode. Changes for example due to temperature variations of the cutting gap, then the counter tool is either tracked or gives way to the ultrasonic sonotrode which, on the one hand, maintains a high quality of cut, on the other hand the wear on the work surfaces of the Tools is significantly reduced.

Bei einer Weiterbildung ist vorgesehen, dass die Verfahrkraft des Schlittens größer ist als die Zustellkraft des Kraftspeichers, insbesondere um den Faktor 1,2 bis 5,0, bevorzugt um 1,5 bis 2,0. Hierdurch wird bewirkt, dass beim Zustellen der Ultraschallsonotrode und/oder beim Einführen des Werkstücks zwischen die Ultraschallsonotrode und das Gegenwerkzeug nicht die Ultraschallsonotrode, sondern das Gegenwerkzeug ausweicht, wodurch verhindert wird, dass die Arbeitsflächen beschädigt werden. Dabei beträgt die Verfahrkraft des Schlittens mindestens 50 N, insbesondere einen Wert von 200 N bis 5000 N, bevorzugt 800 N bis 2000 N.at a development is provided that the traversing force of the carriage is larger as the delivery force of the energy storage, in particular by the factor 1.2 to 5.0, preferably 1.5 to 2.0. This causes when delivering the ultrasonic sonotrode and / or during insertion of the workpiece between the ultrasonic sonotrode and the counter tool not the Ultrasonic sonotrode, but the counter-tool evades, causing prevents the work surfaces from being damaged. The traversing force is thereby of the carriage at least 50 N, in particular a value of 200 N. to 5000 N, preferably 800 N to 2000 N.

Erfindungsgemäß ist der Kraftspeicher eine mechanische, pneumatische und/oder hydraulische Feder oder ein Magnet, insbesondere ein Elektromagnet. Dabei ist die vom Kraftspeicher aufbringbare Kraft so bemessen, dass sie sehr viel kleiner ist als die Verfahrkraft des Schlittens beziehungsweise der Ultraschallsonotrode, wobei die vom Kraftspeicher aufgebrachte Kraft die Schnittkraft darstellt.According to the invention Power storage a mechanical, pneumatic and / or hydraulic spring or a magnet, in particular an electromagnet. Here is the from the Force memory can be applied force so that they are very much is smaller than the displacement of the carriage or the ultrasonic sonotrode, wherein the applied from the energy storage Force represents the cutting force.

Typische Schneidkräfte liegen zwischen 10 N und 2000 N. Dabei gilt, dass mit zunehmender Dicke des Werkstücks auch die Schneidkräfte zunehmen. Der von der mechanischen Feder gebildete Kraftspeicher kann zum Beispiel eine Wendelfeder, Tellerfeder oder Blattfeder sein. Insbesondere ist die Kraft des Kraftspeichers auf gewünschte Werte einstellbar.typical cutting forces lie between 10 N and 2000 N. It holds that with increasing Thickness of the workpiece also the cutting forces increase. The force accumulator formed by the mechanical spring can, for example, a coil spring, plate spring or leaf spring be. In particular, the force of the energy storage is desired values adjustable.

Gemäß einem bevorzugten Ausführungsbeispiel ist die Resonanzfrequenz des Ambosses mit Gegenwerkzeug kleiner als die Resonanzfrequenz des Schwinggebildes, insbesondere um den Faktor 102 bis 104, bevorzugt um den Faktor 103. Diese Ausgestaltung hat den wesentlichen Vorteil, dass das Gegenwerkzeug mit seiner Arbeitsfläche an der Position der maximalen Auslenkung, d.h. am Scheitelpunkt der Arbeitsfläche der Ultraschallsonotrode verharrt, da aufgrund der geringeren Eigenfrequenz des Gegenwerkzeugs dieses nicht der hochfrequenten Bewegung der Ultraschallsonotrode folgen kann. Die Eigenresonanz des Ambosssystems ist deutlich kleiner als die Eigenresonanz des Ultraschallschwinggebildes, insbesondere der Ultraschallsonotrode. Hierdurch wird ein unkontrolliertes Aufschwingen des Gegenwerkzeugs verhindert.According to a preferred embodiment, the resonance frequency of the anvil with counter-tool is smaller than the resonant frequency of the oscillatory structure, in particular by the factor 10 2 to 10 4 , preferably by the factor 10 3 . This embodiment has the significant advantage that the counter tool with its working surface at the position of the maximum deflection, ie at the apex of the working surface of the ultrasonic sonotrode persists because this can not follow the high frequency movement of the ultrasonic sonotrode due to the lower natural frequency of the counter tool. The natural resonance of the anvil system is significantly smaller than the natural resonance of the ultrasound oscillating structure, in particular the ultrasound sonotrode. As a result, an uncontrolled swinging of the counter tool is prevented.

Das Aufschwingen wird vorteilhaft noch dadurch vermindert, dass der Amboss und insbesondere Kraftspeicher für das Gegenwerkzeug ein Dämpfungselement aufweist. Dieses Dämpfungselement kann auch allgemein im Ambosssystem untergebracht sein, zum Beispiel als Dämpfungselement am Gegenwerkzeug, insbesondere als Reibungsdämpfer. Eine ebenfalls einfache Maßnahme sieht vor, dass die Lager derart ausgeführt sind, dass die Lagerreibung diese dämpfende Eigenschaft besitzt.The swinging is advantageously further reduced by the fact that the anvil and especially energy storage for the counter tool Dämp having. This damping element can also be accommodated generally in the anvil system, for example as a damping element on the counter tool, in particular as a friction damper. Another simple measure provides that the bearings are designed such that the bearing friction has this damping property.

Gemäß einer bevorzugten Ausführungsform sind die Ultraschallsonotrode und das Gegenwerkzeug ausschließlich koaxial aufeinander zu bewegbar. Dies wird durch qualitativ hochwertige Führungen innerhalb des Ultraschallschwingsystems sowie innerhalb des Ambosssystems erreicht. Die Qualität des Schnitts beziehungsweise der Schweißung wird dadurch wesentlich erhöht. Dabei kann die Ultraschallsonotrode und/oder das Gegenwerkzeug eine Schneidkante und/oder eine Schweißkante aufweisen.According to one preferred embodiment the ultrasonic sonotrode and the counter tool exclusively coaxial movable towards each other. This is due to high quality guides within the ultrasonic vibration system as well as within the anvil system reached. The quality of the Section or the weld is thereby essential elevated. In this case, the ultrasonic sonotrode and / or the counter tool a cutting edge and / or a welding edge exhibit.

Eine Weiterbildung sieht vor, dass ein Festanschlag für den Schlitten, mit welchem die Ultraschallsonotrode verfahren wird, vorgesehen ist. Hierdurch wird eine definierte Zustellung und die Einstellung eines exakten Schweiß- oder Schneidspaltes ermöglicht und außerdem die Ultraschallsonotrode optimal fixiert.A Continuing provides that a hard stop for the sled, with which the ultrasonic sonotrode is moved, is provided. hereby will be a defined delivery and the setting of an exact welding or cutting gap allows and also the ultrasonic sonotrode optimally fixed.

Für eine weitere Optimierung der Schnittgeschwindigkeit und Verringerung des Verschleißes der Werkzeuge kann die Einschwingzeit des Ultraschallsystems verlängert werden. Längere Einschwingzeiten sind vorteilhaft hinsichtlich des Verschleißes, verursachen jedoch eine längere Schneidzeit.For another Optimization of the cutting speed and reduction of tool wear the settling time of the ultrasound system can be extended. longer Settling times are advantageous in terms of wear, cause but a longer one Cutting time.

Die Schweißflächen können zusätzlich im gleichen, die Schneidkante aufweisenden Werkzeug vorhanden sein, oder es können zusätzliche Werkzeuge mit der Schweißfläche vorgesehen sein.The Welding surfaces can also be in the same, the cutting edge having tool, or there may be additional Tools provided with the welding surface be.

Die eingangs genannte Aufgabe wird erfindungsgemäß auch mit einem Verfahren zum Betreiben der obigen Vorrichtung gelöst, indem die Ultraschallsonotrode insbesondere über das Werkstück das Gegenwerkzeug in eine Arbeitslage verschiebt und dabei eine Zustellkraft auf das Werkstück ausübt.The The object mentioned above is according to the invention also with a method for operating the above device by the ultrasonic sonotrode especially about the workpiece that Moves counter tool in a working position while a Zustellkraft on the workpiece exercises.

Die Ultraschallsonotrode wird also nicht nur so weit zugestellt, bis sie das Werkstück berührt, sondern die Ultraschallsonotrode verschiebt das Gegenwerkzeug und drückt dabei mit einer vorgegebenen Zustellkraft auf das Werkstück. Bei diesem Vorgang wird das Gegenwerkzeug um einen Arbeitsweg verschoben. Durch die Auslenkung des Gegenwerkzeugs wird sichergestellt, dass das Werkstück, welches über das Gegenwerkzeug an die Ultraschallsonotrode angedrückt wird, vollständig bearbeitet, insbesondere vollständig durchtrennt, wird. Dabei spielen temperaturbedingte Längenänderungen im gesamten System keine Rolle. Die geringe Eigenfrequenz, resultierend aus Masse, Federrate und Dämpfung des Gegenwerkzeugs, verhindert eine Beschädigung der Arbeitsflächen, da das Gegenwerkzeug am äußeren Scheitelpunkt des Ultraschallwerkzeugs stehen bleibt.The Ultrasonic sonotrode is thus not only delivered so far, until she the workpiece touched, but the ultrasonic sonotrode shifts the counter tool and presses doing so with a predetermined feed force on the workpiece. at This process, the counter tool is moved to a work path. The deflection of the counter tool ensures that the workpiece, which over the counter tool is pressed against the ultrasonic sonotrode, Completely edited, in particular completely is severed. Temperature-related changes in length play a role here throughout the system does not matter. The low natural frequency, resulting from mass, spring rate and damping the counter tool, prevents damage to the work surfaces since the counter-tool at the outer vertex the ultrasonic tool stops.

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus den Unteransprüchen sowie der nachfolgenden Beschreibung, in der unter Bezugnahme auf die Zeichnung zwei besonders bevorzugte Ausführungsbeispiele im Einzelnen beschrieben sind. Dabei können die in der Zeichnung dargestellten sowie in der Beschreibung und in den Ansprüchen erwähnten Merkmale jeweils einzeln für sich oder in beliebiger Kombination erfindungswesentlich sein.Further Advantages, features and details of the invention will become apparent the dependent claims as well as the following description, with reference to FIG the drawing two particularly preferred embodiments described in detail are. It can those shown in the drawing and in the description and in the claims mentioned Features individually for themselves or be essential to the invention in any combination.

In der Zeichnung zeigen:In show the drawing:

1 einen schematischen Aufbau einer ersten Ausführungsform der erfindungsgemäßen Vorrichtung, und 1 a schematic structure of a first embodiment of the device according to the invention, and

2 einen schematischen Aufbau einer ersten Ausführungsform der erfindungsgemäßen Vorrichtung. 2 a schematic structure of a first embodiment of the device according to the invention.

Die 1 zeigt eine insgesamt mit 10 bezeichnete Vorrichtung zum Bearbeiten eines Werkstücks 12 mittels Ultraschall. Die Vorrichtung 10 besteht aus einem Ultraschallschwinggebilde 14 sowie einem Amboss 16, der unterhalb des Ultraschallschwinggebildes 14 angeordnet ist. Der Amboss 16 befindet sich in einem Maschinengestell 18, an dessen Arm 20 das Ultraschallschwinggebilde 14 über einen in Richtung des Doppelpfeils 22 verfahrbaren Schlitten 24 befestigt ist. Außerdem ist ein Festanschlag 26 erkennbar, dessen Position in Richtung des Doppelpfeils 28 einstellbar ist. Das Ultraschallschwinggebilde 14 weist einen Konverter 30 sowie eine Ultraschallsonotrode 32 auf, deren Arbeitsfläche 34 an der Oberseite des Werkstücks 12 anliegt. Der Amboss 16 ist mit einer Einstellvorrichtung 36 versehen, die im Maschinengestell 18 gelagert ist. An der Einstellvorrichtung 36 ist ein von einer mechanischen Feder 38, insbesondere einer Wendelfeder, gebildeter Kraftspeicher 40 befestigt, an welchem wiederum ein Gegenwerkzeug 42 gelagert ist. Die Arbeitsfläche 44 des Gegenwerkzeugs 42, die beim gezeigten Ausführungsbeispiel als Schneidkante dargestellt ist, liegt an der Unterseite des Werkstücks 12 an und befindet sich gegenüber der Arbeitsfläche 34 der Ultraschallsonotrode 32.The 1 shows a total with 10 designated device for machining a workpiece 12 by ultrasound. The device 10 consists of an ultrasonic oscillator 14 as well as an anvil 16 , which is below the ultrasound waveform 14 is arranged. The anvil 16 is located in a machine frame 18 , on whose arm 20 the ultrasonic vibrating structure 14 over one in the direction of the double arrow 22 movable slide 24 is attached. There is also a hard stop 26 recognizable, its position in the direction of the double arrow 28 is adjustable. The ultrasonic vibrating structure 14 has a converter 30 and an ultrasonic sonotrode 32 on, whose working surface 34 at the top of the workpiece 12 is applied. The anvil 16 is with an adjustment device 36 provided in the machine frame 18 is stored. At the adjustment device 36 is one of a mechanical spring 38 , in particular a spiral spring, formed energy storage 40 attached, on which in turn a counter tool 42 is stored. The work surface 44 of the counter tool 42 , which is shown in the embodiment shown as a cutting edge, lies on the underside of the workpiece 12 and is opposite the work surface 34 the ultrasonic sonotrode 32 ,

Das Ultraschallschwinggebilde 14 und der Amboss 16 sind achsparallel, insbesondere koaxial zueinander ausgerichtet. Mit der Einstellvorrichtung 36 kann das Gegenwerkzeug 42 mit einer vorbestimmten Kraft, insbesondere Zustellkraft FS auf das Werkstück 12 gepresst werden. Diese Zustellkraft FS wird in der Feder 38 gespeichert.The ultrasonic vibrating structure 14 and the anvil 16 are axially parallel, in particular coaxially aligned with each other. With the adjustment device 36 can be the counter-tool 42 with a predetermined force, in particular delivery force F S on the workpiece 12 be pressed. This feed force F S is in the spring 38 saved.

Ferner ist erkennbar, dass das Gegenwerkzeug 42 im Maschinengestell 18 in einem Lager 48 in Richtung der Vertikalachse 46 verschieblich gelagert ist, wobei das Lager 48 eine Lagerreibung aufweist, welche eine Dämpfung D bewirkt. Das Gegenwerkzeug 42 besitzt eine Masse m. Außerdem weist die Feder 38 eine Federkonstante c auf. Somit ergibt sich für den Amboss 16 eine Resonanzfrequenz fA = f(m, c, D), die sich aus der Masse m des Gegenwerkzeugs 42, der Federkonstante c der Feder 38 sowie der Dämpfung D des Lagers 48 bestimmt.Furthermore, it can be seen that the counter tool 42 in the machine frame 18 in a warehouse 48 in the direction of the vertical axis 46 is slidably mounted, the bearing 48 has a bearing friction, which causes a damping D. The counter tool 42 has a mass m. In addition, the spring points 38 a spring constant c. This results in the anvil 16 a resonance frequency f A = f (m, c, D) resulting from the mass m of the counter tool 42 , the spring constant c of the spring 38 and the damping D of the bearing 48 certainly.

Aus der 1 ist noch erkennbar, dass der Schlitten 24 mit einer insbesondere einstellbaren Verfahrkraft FV auf den Festanschlag 26 drückt. Dabei ist die Verfahrkraft FV wesentlich größer als die Zustellkraft FS (FV >> FS), so dass das Werkstück 12 zusammen mit dem Gegenwerkzeug 42 verschoben und die Feder 38 komprimiert und die Kraft FS in der Feder 38 gespeichert wird.From the 1 is still recognizable that the sled 24 with a particular adjustable traversing force F V on the fixed stop 26 suppressed. In this case, the displacement force F V is substantially greater than the feed force F S (F V >> F S ), so that the workpiece 12 together with the counter tool 42 moved and the spring 38 compressed and the force F S in the spring 38 is stored.

Nachfolgend wird die Arbeitsweise der Vorrichtung 10 beschrieben.The operation of the device will be described below 10 described.

Wie bereits erwähnt, fährt das Ultraschallschwinggebilde 14 mittels des Schlittens 24 in Richtung des Ambosses 16, bis die Arbeitsfläche 34 der Ultraschallsonotrode 32 auf dem Werkstück 12 aufsitzt. Anschließend drückt die Ultraschallsonotrode 32 das Werkstück 12 zusammen mit dem Gegenwerkzeug 42 so weit in Richtung der Einstellvorrichtung 36, d.h. in der 1 nach unten, bis der Schlitten 24 am Festanschlag 26 aufsitzt. Dadurch baut sich in der Feder 38 eine Zustellkraft oder Schneidkraft FS auf, mit der die Arbeitsfläche 44 an der Unterseite des Werkstücks 12 anliegt und das Werkstück 12 an die Arbeitsfläche 34 der Ultraschallsonotrode 32 presst.As already mentioned, the ultrasonic oscillator moves 14 by means of the carriage 24 in the direction of the anvil 16 until the work surface 34 the ultrasonic sonotrode 32 on the workpiece 12 seated. Then presses the ultrasonic sonotrode 32 the workpiece 12 together with the counter tool 42 so far in the direction of the adjustment 36 ie in the 1 down to the sled 24 on the hard stop 26 seated. This builds up in the spring 38 a feed force or cutting force F S , with the working surface 44 at the bottom of the workpiece 12 abuts and the workpiece 12 to the work surface 34 the ultrasonic sonotrode 32 pressed.

Sodann wird die Ultraschallsonotrode 32 in Gang gesetzt, so dass die Arbeitsfläche 34 mit dem eingestellten Ultraschall schwingt, wie bei 50 dargestellt. Dadurch wird das Werkstück 12 durchtrennt und die Arbeitsfläche 44 des Gegenwerkzeugs 42 dringt in das Werkstück 12 ein. Die Schnittkraft FS wird ausschließlich durch das Gegenwerkzeug 42 aufgebracht, da die Ultraschallsonotrode 32 am Festanschlag 26 anliegt.Then the ultrasound sonotrode 32 set in motion, leaving the work surface 34 vibrates with the adjusted ultrasound, as at 50 shown. This will make the workpiece 12 severed and the work surface 44 of the counter tool 42 penetrates into the workpiece 12 one. The cutting force F S is exclusively due to the counter tool 42 Applied because the ultrasonic sonotrode 32 on the hard stop 26 is applied.

Sobald das Werkstück 12 durchtrennt ist, kommen die Arbeitsflächen 34 und 44 kurzzeitig in Kontakt, wobei nun aber das Gegenwerkzeug 42 in dieser Position verharrt. Das Gegenwerkzeug 42 kann der hochfrequent schwingenden Arbeitsfläche 34 der Ultraschallsonotrode 32 nicht folgen, da die Eigenfrequenz oder Resonanzfrequenz des Gegenwerkzeugs 42 wesentlich niedriger liegt, insbesondere um den Faktor 103, als die Schwingfrequenz der Ultraschallsonotrode 32. Daher verharrt die Arbeitsfläche 44 in Ruhe. Dies kann durch geeignete Wahl der Masse m, der Federkonstante c sowie der Dämpfung D erreicht werden. Da sich die Arbeitsflächen 34 und 44 dennoch berühren, und um einer übermäßigen Abnutzung vorzubeugen, besitzen sie eine Härte von mindestens 55 HRC.As soon as the workpiece 12 is severed, come the work surfaces 34 and 44 briefly in contact, but now the counter-tool 42 remains in this position. The counter tool 42 can the high-frequency vibrating work surface 34 the ultrasonic sonotrode 32 do not follow, since the natural frequency or resonant frequency of the counter tool 42 is much lower, in particular by a factor of 10 3 , than the oscillation frequency of the ultrasonic sonotrode 32 , Therefore, the work surface remains 44 in peace. This can be achieved by a suitable choice of the mass m, the spring constant c and the damping D. As the work surfaces 34 and 44 nevertheless, and to prevent excessive wear, they have a hardness of at least 55 HRC.

Bei einer Weiterbildung ist die Arbeitsfläche 44 des Gegenwerkzeugs 42 nicht nur als Schneidkante ausgebildet, sondern weist gleichzeitig auch eine Schweißfläche auf, so dass mit dem Gegenwerkzeug 42 nicht nur geschnitten, sondern auch geschweißt werden kann. Auf diese Weise können aus mehreren Lagen bestehende Werkstücke 14 gleichzeitig geschnitten und die einzelnen Lagen miteinander verschweißt werden. Dies ist insbesondere bei Schlauchbeutelanlagen wünschenswert, in denen die einzelnen Schlauchbeutel befüllt und anschließend voneinander getrennt werden.In a training is the work surface 44 of the counter tool 42 not only formed as a cutting edge, but at the same time also has a welding surface, so that with the counter tool 42 not only cut, but also welded. In this way, consisting of several layers of workpieces 14 cut simultaneously and the individual layers are welded together. This is particularly desirable in tubular bag systems in which the individual tubular bags are filled and then separated from each other.

In der 2 weist der Amboss eine Schneidkante 44 und eine Schweißkante 52 auf, wobei die Schweißkante 52 z.B. am Maschinengestelle 18 befestigt ist. Das Werkstück 12 wird erfährt dann sowohl eine Schweißbearbeitung und wird geschnitten. Die Schneidkante 44, die empfindlich ist und geschützt werden muss, ist federnd gelagert.In the 2 the anvil has a cutting edge 44 and a welding edge 52 on, with the welding edge 52 eg on the machine frame 18 is attached. The workpiece 12 will then undergo both a welding and will be cut. The cutting edge 44 , which is sensitive and must be protected, is spring-mounted.

Claims (14)

Vorrichtung (10) zum Bearbeiten von Werkstücken (12) mittels Ultraschall, mit einem Ultraschallschwinggebilde (14) und einem Amboss (16) mit einem Gegenwerkzeug (42), wobei das Ultraschallschwinggebilde (14) eine Ultraschallsonotrode (32) aufweist, die über einen Schlitten (24) in deren Achsrichtung (46) und in Richtung des Gegenwerkzeugs (42) verfahrbar ist, dadurch gekennzeichnet, dass ein Kraftspeicher (40) für das Gegenwerkzeug (42) vorgesehen ist, mit dem das Gegenwerkzeug (42) in Richtung der Ultraschallsonotrode (32) mit einer Kraft (FS) beaufschlagt wird.Contraption ( 10 ) for machining workpieces ( 12 ) by means of ultrasound, with an ultrasonic oscillating structure ( 14 ) and an anvil ( 16 ) with a counter tool ( 42 ), wherein the ultrasonic oscillator ( 14 ) an ultrasonic sonotrode ( 32 ), which via a carriage ( 24 ) in its axial direction ( 46 ) and in the direction of the counter tool ( 42 ), characterized in that a force accumulator ( 40 ) for the counter tool ( 42 ) is provided, with which the counter tool ( 42 ) in the direction of the ultrasonic sonotrode ( 32 ) is acted upon by a force (FS). Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Verfahrkraft (FV) des Schlittens (24) größer ist als die Zustellkraft (FS) des Kraftspeichers (40) (FV >> FS), insbesondere um den Faktor 1,2 bis 5,0 und bevorzugt um den Faktor 1,5 bis 2,0.Apparatus according to claim 1, characterized in that the displacement force (F V ) of the carriage ( 24 ) is greater than the delivery force (F S ) of the energy storage device ( 40 ) (F V >> F S ), in particular by a factor of 1.2 to 5.0 and preferably by a factor of 1.5 to 2.0. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Verfahrkraft (FV) des Schlittens (24) mindestens 50 N beträgt.Device according to one of the preceding claims, characterized in that the traversing force (F V ) of the carriage ( 24 ) is at least 50 N. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Kraftspeicher (40) eine mechanische Feder (38), eine pneumatische und/oder hydraulische Feder oder ein Magnet, insbesondere ein Elektromagnet, ist.Device according to one of the preceding claims, characterized in that the energy store ( 40 ) a mechanical spring ( 38 ), one pneumatic and / or hydraulic spring or a magnet, in particular an electromagnet, is. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Resonanzfrequenz (fA) des Ambosses (16) kleiner ist als die Resonanzfrequenz (fS) des Schwinggebildes (14) (fA >> fS), insbesondere um den Faktor 102 bis 104, bevorzugt um den Faktor 103.Device according to one of the preceding claims, characterized in that the resonance frequency (f A ) of the anvil (f A ) 16 ) is smaller than the resonance frequency (f S ) of the oscillatory structure ( 14 ) (f A >> f S ), in particular by the factor 10 2 to 10 4 , preferably by the factor 10 3 . Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Kraftspeicher (40) für das Gegenwerkzeug (42) ein Dämpfungselement aufweist.Device according to one of the preceding claims, characterized in that the energy store ( 40 ) for the counter tool ( 42 ) has a damping element. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Ultraschallsonotrode (32) und das Gegenwerkzeug (42) ausschließlich koaxial (46) aufeinander zu bewegbar sind.Device according to one of the preceding claims, characterized in that the ultrasonic sonotrode ( 32 ) and the counter tool ( 42 ) are exclusively coaxial (46) to each other to be moved. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Ultraschallsonotrode (32) und/oder das Gegenwerkzeug (42) eine Schneidkante (44) und/oder eine Schweißkante aufweist beziehungsweise aufweisen.Device according to one of the preceding claims, characterized in that the ultrasonic sonotrode ( 32 ) and / or the counter tool ( 42 ) a cutting edge ( 44 ) and / or have or have a welding edge. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass die Schneidkante (44) federnd gelagert ist.Device according to claim 8, characterized in that the cutting edge ( 44 ) is spring-mounted. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass die Schweißkante am Maschinengestell (18) gelagert ist.Apparatus according to claim 8, characterized in that the welding edge on the machine frame ( 18 ) is stored. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass ein Festanschlag (26) für den Schlitten (24) vorgesehen ist.Device according to one of the preceding claims, characterized in that a fixed stop ( 26 ) for the sledge ( 24 ) is provided. Verfahren zum Verwenden einer Vorrichtung (10) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Ultraschallsonotrode (32), insbesondere über das Werkstück (12), das Gegenwerkzeug (42) in eine Arbeitslage verschiebt und dabei eine Zustellkraft (FS) auf das Werkstück (12) ausübt.Method for using a device ( 10 ) according to one of the preceding claims, characterized in that the ultrasonic sonotrode ( 32 ), in particular over the workpiece ( 12 ), the counter-tool ( 42 ) in a working position and thereby a feed force (F S ) on the workpiece ( 12 ) exercises. Verfahren nach Anspruch 12, dadurch gekennzeichnet, dass das Gegenwerkzeug (42) dabei um einen Teilbetrag eines maximalen Verschiebewegs verschoben wird.Method according to claim 12, characterized in that the counter-tool ( 42 ) is thereby shifted by a partial amount of a maximum displacement. Verfahren nach Anspruch 12 oder 13, dadurch gekennzeichnet, dass die Resonanzfrequenz des Gegenwerkzeugs (42) so gewählt wird, dass dieses bei schwingender Ultraschallsonotrode (32) am Scheitelpunkt der Arbeitsfläche (34) in der Ultraschallsonotrode (32) verharrt.Method according to claim 12 or 13, characterized in that the resonance frequency of the counter-tool ( 42 ) is selected so that this vibrating ultrasonic sonotrode ( 32 ) at the vertex of the workspace ( 34 ) in the ultrasonic sonotrode ( 32 ) persists.
DE200610020429 2006-04-26 2006-04-26 Ultrasonic guillotine has fixed anvil surface and cutting tool linked to energy source Pending DE102006020429A1 (en)

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DE200610020429 DE102006020429A1 (en) 2006-04-26 2006-04-26 Ultrasonic guillotine has fixed anvil surface and cutting tool linked to energy source
EP07003846.8A EP1849569B2 (en) 2006-04-26 2007-02-26 Device for machining workpieces using ultrasound and method for operating such a device
US11/730,935 US20070251362A1 (en) 2006-04-26 2007-04-05 Device for processing workpieces using ultrasound and method for operating that device
HK07113899A HK1105391A1 (en) 2006-04-26 2007-12-19 Device for machining workpieces using ultrasound and method for operating such a device
US12/588,063 US20100024956A1 (en) 2006-04-26 2009-10-02 Device for processing workpieces using ultrasound and method for operating that device
US13/850,358 US20130213198A1 (en) 2006-04-26 2013-03-26 Device for processing workpieces using ultrasound and method for operating that device

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