EP3470190A1 - Outil de fraisage destiné au traitement du bois, des matériaux en bois, des matières plastiques ou des métaux légers - Google Patents

Outil de fraisage destiné au traitement du bois, des matériaux en bois, des matières plastiques ou des métaux légers Download PDF

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Publication number
EP3470190A1
EP3470190A1 EP18198655.5A EP18198655A EP3470190A1 EP 3470190 A1 EP3470190 A1 EP 3470190A1 EP 18198655 A EP18198655 A EP 18198655A EP 3470190 A1 EP3470190 A1 EP 3470190A1
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EP
European Patent Office
Prior art keywords
machining
milling tool
tool
pressure ring
tool according
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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
EP18198655.5A
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German (de)
English (en)
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EP3470190B1 (fr
Inventor
Andreas Kisselbach
Jürgen Graef
Heiko Ehrensperger
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Leitz GmbH and Co KG
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Leitz GmbH and Co KG
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Application filed by Leitz GmbH and Co KG filed Critical Leitz GmbH and Co KG
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27C—PLANING, DRILLING, MILLING, TURNING OR UNIVERSAL MACHINES FOR WOOD OR SIMILAR MATERIAL
    • B27C5/00—Machines designed for producing special profiles or shaped work, e.g. by rotary cutters; Equipment therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27D—WORKING VENEER OR PLYWOOD
    • B27D5/00—Other working of veneer or plywood specially adapted to veneer or plywood
    • B27D5/006—Trimming, chamfering or bevelling edgings, e.g. lists
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G13/00—Cutter blocks; Other rotary cutting tools
    • B27G13/005—Tools composed of two or more rotating discs
    • B27G13/007—Tools composed of two or more rotating discs which are adjustable relatively to each other

Definitions

  • Milling tool for machining wood, wood-based materials, plastics or light metals, with a machining side and a spindle side and with a first, rotatable about a rotation axis housing, stationary machining tool and at least a second machining tool, the coaxial with the first machining tool between a rest position and a machining position displaced is arranged.
  • Such a milling tool is used for profiling edges and corners on plate-shaped workpieces.
  • the profile radius of the milling tool must also be adapted to the edge strip thickness.
  • frequent tool changes result with production stoppages. For this reason, some solutions with switchable tools have been developed in order to be able to change the profile without removing and installing the tools. Partially even under rotation of the tool.
  • the initially mentioned milling tool is for example from the DE 199 15 672 A1 known.
  • differently profiled cutting are appropriate.
  • the cutting edge with the largest radius is always fixed in machining position.
  • a differently profiled cutting edge with a smaller radius is pushed into its machining position and completely covers the profile of the first cutting edge except for the circumferential profile outlet.
  • the change of the cutting profile is carried out by a linear movement of one of the movably arranged machining tools, the pneumatic is triggered.
  • the disadvantage of this is that a separate control is necessary for each movable machining tool, which leads to a complex construction with more than two differently profiled cutting.
  • a milling tool is known in which the differently profiled cutting are not brought by axial, but by radial move in their processing position.
  • the cutting edges are arranged on radially displaceable blade carriers and the pneumatically induced axial movement of the coaxially arranged actuating elements is converted by means of conical bevels into a radial movement of the blade carriers.
  • a separate control must be carried out for each movable machining tool.
  • the processing tools not in working position must be withheld by pneumatic pressure against the centrifugal forces, which requires high adjustment forces at high speeds.
  • the individual processing tools are mounted individually in the tool head and axially displaceable. This allows them to be easily moved from a rest position to a machining position. A machining tool is firmly positioned in the machining position. Unnecessary editing tools are retracted in their rest position. During machining, the activated machining tool must always be held in its machining position by an external force against cutting pressure and spring restoring forces. Since the individual processing tools are arranged outside the axis of rotation, speed-dependent centrifugal forces act on the processing tools, which requires a very precise storage in order to avoid a widening of the diameter of the cutting under load.
  • the DE 10 2014 008 033 A1 discloses a milling tool in which differently profiled cutting edges are arranged on rotatably adjustable cutting carriers. A profile change takes place by means of a defined synchronous rotational movement of the cutter carriers. Without increasing the complexity of this milling tool, a change of more than three profiles is possible.
  • the DE 74 26 183 U discloses a milling tool which is composed of two positively associated with each other tool bodies, which are formed approximately symmetrical and carry the cutting.
  • the tool bodies are arranged displaceable relative to one another via a threaded spindle.
  • the US 4,551,165 A discloses an automatic cutting edge changer for exchanging the cutting edges on a tool. If a sensor detects wear or chipping on the cutting edges, the cutting edge changer moves the cutting tip out of its cutting position and inserts a new cutting edge.
  • the from the DE 10 2011 004 536 A1 known Mehrprofilfräsvoriques is equipped with a first tool, which is located in a working position and a second tool that can be brought into a working position. Between a sliding cylinder for the second tool and the tool, an additional spindle is provided. When the second tool is in the working position, the machining profile of the second tool superimposes the machining profile of the first tool so that a workpiece to be machined receives the second machining profile.
  • the DE 10 2013 226 214 A1 discloses an apparatus for processing a workpiece made of wood, wood-based materials, plastics or the like, which has two milling tools for contour machining of an edge of the workpiece.
  • the second milling tool is adjustable relative to the first milling tool between a rest position in which the first milling tool can be brought into engagement with the workpiece, and a machining position in which the second milling tool is engageable with the workpiece.
  • a third milling tool which is arranged coaxially to the other two milling tools, the edge can be milled flush on the workpiece.
  • the present invention seeks to ensure an automatic profile change of at least two, preferably three or more profiles while the tool is stationary without tool change process.
  • the generic milling tool is characterized in that the at least second machining tool for displacement in the axial direction with a rotatable about the axis of rotation in the housing arranged cam plate can be brought into connection.
  • the mechanism for changing the profile occupies a small space and the milling tool is simple.
  • a plurality of second processing tools may be provided.
  • the cam plate provided with axially facing cams is incrementally rotatable. This makes it possible to bring the machining tools in their processing position by an axial reciprocating movement.
  • the first machining tool is preferably rigidly connected to a base body which is non-rotatably coupled to the housing.
  • the machining tool is bolted to the base body.
  • the cam may be connected to a sleeve-shaped pressure ring which has at least one, preferably three, radially inwardly projecting balls (as sliding blocks) which runs in a meandering circumferential groove (as a backdrop) of a rotatably connected to the housing latching sleeve and forms a slotted guide, wherein the inner diameter of the pressure ring is greater than the outer diameter of the detent sleeve.
  • the ball or the balls are preferably arranged (with play) in a radial bore in the inner wall of the pressure ring and thereby preferably radially adjustable by means of a grub screw to the locking sleeve.
  • the at least one ball can be guided either clockwise or counterclockwise is, can turn at the direction reversal of the stroke no reversal point.
  • an overlap in the running direction of the ball is preferably provided at the reversal points of the groove.
  • the cam is preferably rotatably connected to the pressure ring and slidably connected in the axial direction. It is advantageous if at least one compression spring acting in the axial direction is provided between the pressure ring and the base body.
  • each displaceably arranged machining tool has regularly spaced cylinder pins on a pitch circle, which run parallel to the axis of rotation and can be brought into operative connection with cams arranged on the cam disk. This simplifies the engagement of the cam disc with the respective machining tool.
  • the at least one compression spring is preferably axially guided in a spring ring and the spring ring is rotatably supported via a thrust bearing to the pressure ring. Between the fixed machining tool and the one or more sliding machining tools (at least second machining tool) one or three compression springs are arranged in each case.
  • the pressure ring can be provided on the spindle side with a closed circumferential end face, which serves as a running surface for a rolling element.
  • Each machining tool is preferably provided with a plurality of cutting edges, wherein the cutting edges are identically profiled on each individual machining tool, but each of the machining tools has differently profiled cutting edges. It is also conceivable that two processing tools have cutting edges that are identically profiled.
  • the profiles of the cutting edges are preferably radii or chamfers and the stationary machining tool carries the cutting edge with the largest radius.
  • the respectively active cutting profile can be indexed and made visible to the viewer.
  • a processing apparatus which is provided with a tool designed according to the invention has an axially movable actuating device, with which a disengagement movement and a return stroke can be executed, and which has at least one pressure element and a rolling element.
  • the pressure element is preferably a sprung bolt and the rolling element is a ball roller.
  • a method for operating this processing device is characterized in that in the disengagement movement of the actuator in a first step, the contact between the axially movable machining tools and the cam is achieved, in a second step on the meandering groove in the detent sleeve and the at least one ball in the pressure ring, the cam disk is set in rotation, the rotational movement of the cam disk is completed in the subsequent return stroke of the actuator and in a third step at the end of the return stroke the axially movable machining tools again come to rest on the cam.
  • the milling tool consists of a base body 4, which carries a fixedly connected by screws 29 first machining tool 1 with a first cutting profile 31 and at least a second axially displaceable machining tool 2 with a second cutting profile 32.
  • the main body 4 is provided with a flange portion 30 with holes for receiving machining tools 1, 2, 3 and with an interface for attachment to a rotatable drive (machine spindle, not shown) executed, for. B. a bore 25, advantageously with a conical bore for backlash centering.
  • the milling tool is closed by a housing 11 which is connected via grub screws 40, which engage in corresponding grooves 44 in the base body 4, rotationally fixed and axially displaceable with this (see. FIG. 5 ).
  • the illustrated embodiment has a fixed to the base body 4 screwed tool 1 with a cutting profile 31 and two axially movable machining tools 2, 3, each with a cutting profile 32, 33, which are guided on different coaxial cylindrical surfaces of the base body 4.
  • the movable machining tools 2, 3 are clamped in the axial direction relative to the fixed tool 1 and cylinder pins 37, 38, they are rotatably and axially slidably connected to the base body 4.
  • the cylindrical pins 37, 38 engage through the bores 37.1, 38.1 in the flange of the base body 4 in order to cooperate with a cam disk 7.
  • the protruding in the axial direction cam 17 cam plate 7 is rotatably mounted in the base body 4 and fixed axially by a locking ring 10.
  • the axial position of the movable machining tools 2, 3 is changed by the angular position of the cam disk 4 between a working position and a rest position. If the position of the cams 17 is such that none of the processing tools 2, 3 has contact with the cams 17 via the cylinder pins 37, 38, both axially displaceable processing tools 2, 3 engage with their backplanar surface 39 on the base body 4 and the cutting profiles 32, 33 are outside the machining position (in rest position). The solid machining tool 1 is in working position. If the position of the cams 17 is such that one of the two axially displaceable machining tools 2, 3 bears against the cams 17 of the cam disk 7 with its cylinder pins 37, then this machining tool 2, 3 is in its working position with its cutting profile.
  • the different edge profiles (radii and chamfers) to be produced are distributed over the machining tools 1, 2, 3 so that the fixed machining tool 1 has the largest profile radius and the smaller profile radii and chamfer profiles are assigned to the axially displaceable machining tools 2, 3. If all the cutting profiles 31, 32, 33 are designed so that they have the same reference point for the "glue joint" in the working position, the profile of the fixed machining tool 2, 3 is always overlapped by the profile of an axially displaceable machining tool 1, so that only this axially displaceable machining tool 2, 3 profiling.
  • the locking sleeve 5 is fixedly connected to the housing 4, z. B. on grub screws 34.
  • the locking sleeve 5 has a circumferential substantially zigzag groove 18, which serves as a backdrop for a slotted guide.
  • the groove 18 has a semicircular cross section and serves as a raceway for at least one ball 19.
  • the locking sleeve 5 cooperates with a pressure ring 9, which is connected via at least one ball 19, preferably three balls, via the groove 18 with the latching sleeve 5 movable ,
  • the movement between locking sleeve 5 and pressure ring 9 is positively guided by the meandering course of the groove 18.
  • the pressure ring 9 is in turn connected via projections 15 which engage in grooves 16 of the cam plate 7, rotationally fixed and axially displaceable with this.
  • the actuator 21 is arranged on the spindle side and via holes 23 with a linear movement unit, for. B. a pneumatic piston (not shown) connected.
  • the actuating device 21 has at least one spring-loaded pin 35, which acts on the housing 11, and at least one radially inwardly seated rolling element 36, which acts on the pressure ring 9.
  • the pressure ring 9 has in the contact region of the at least one rolling element 36 via a continuous continuous Tread. In the processing state, there is no contact between the actuating device 21 and the milling tool (gap), so that the milling tool can be driven in rotation.
  • the rotating milling tool is first stopped.
  • the profile change can be divided into four phases.
  • phase 1 the housing 11 is first pushed by the disengagement of the actuator 21 via the spring-loaded bolts against the force of the springs 26, 27 in the direction of the machining side A.
  • the housing 11 takes over its end face, the two axially movable machining tools 2, 3 with, until they strike the stationary machining tool 1, so that the cylinder pins 37, 38 outside of the contact area with the cam 7 get and no longer contact between the backplane 39 and consists of the base body 4.
  • the total spring force of the sprung bolts 35 must be greater than the total spring force of the springs 26, 27.
  • the cam disc 7 is relieved, whereby the friction decreases in their subsequent rotational movement.
  • the sprung bolts 35 are not compressed.
  • the rolling element 36 presses against the running surface of the pressure ring 9 and also displaces it axially in the direction of the machining side A.
  • the sprung bolts 35 yield in the process. Since the housing 11 is locked against rotation via the contact with the spring-loaded bolts 35 and the housing 11 is in turn rotationally coupled via positive engagement with the base body 4 and the latching sleeve 5, an axial movement of the pressure ring 9 via the slide guide causes a rotational movement of the pressure ring 9 enforced until the at least one ball 19 reaches the processing-side reversal point of the slotted guide. About the interlocking elements 15, 16, the rotational movement of the pressure ring 9 is transmitted to the cam plate 7. The cams 17 assume a different position relative to the machining tools 2, 3.
  • Phase 3 begins.
  • the rotational movement of pressure ring 9 and cam 7 is now by the spring force causes the springs 28 and continues until the at least one ball 19 reaches the spindle-side reversal point of the backdrop. In this position, the pressure ring 9 and with it the cam disc 7 is locked.
  • phase 4 the axially displaceable machining tools 2, 3 are moved by means of the springs 26, 27 in the direction of the spindle side B until, depending on the position of the cam disc 7 either with its cylinder pins 37, 38 on the cam 17 of the cam disc 7 or with its back plane surface 39 abut the base body 4.
  • the actuator 21 After completion of the profile change, the actuator 21 has no contact with the tool more (gap).
  • the substantially zigzagging groove 16 of the locking sleeve 5 is designed so that the cam 7 in incremental steps always in the same direction - ie either clockwise or counterclockwise - rotates, so after completion of an operating cycle consisting of disengagement and return movement (Back and forth), the cam 17 of the cam 7 in an altered rotational position to the machining tools 2, 3 are.
  • the oblique areas of the substantially zigzag groove 16 have different pitches.
  • an overlap of the zigzag groove 16 is required only at the reversal points from the large to the small pitch.
  • the groove areas in the direction of the disengagement movement triggered by the actuating device 21 have a greater pitch than the groove areas in the direction of the return movement triggered by the springs 28. Due to the different gradients, the frictional resistance can be adapted to different forces in the disengagement and return stroke and the wear of the backdrop can be reduced.
  • the slope of the steeper running groove areas decreases in the direction of movement of the ball 19 degressive. Such a Nutverlauf the force pulse can be reduced in a sudden onset disengagement and the wear on the slide guide can be minimized.
  • slotted guide and cams or cylindrical pins 37, 38 is suitably coordinated so that after each actuation cycle another tool is brought into working position. Due to the bias of the springs 28 and the zigzag course of the groove 16, the device engages after each switching cycle (profile change) in the new position.
  • each angular position clearly a cutting profile 31, 32, 33 can be assigned, the angular position of the pressure ring 9 relative to the housing 11 for indexing the respective active cutting profile 31, 32, 33rd be used on the spindle side B of the milling tool by z. B. on the housing 11 an indexing mark 43 is attached to the pressure ring 9 and different markings 42 for the various cutting profiles 31, 32, 33, so that always the indexing mark opposite profile marking the active cutting profile 31, 32, 33 indicates (Principle "parking disc").
  • This possibility of detecting the active cutting profile 31, 32, 33 is particularly required for referencing the machine control during initial startup or after faults.
  • the markings 42 mounted on the spindle side are clearly visible from the operator side, while the cutting profiles 31, 32, 33 are generally not accessible, since they are covered by a suction hood.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Milling Processes (AREA)
EP18198655.5A 2017-10-11 2018-10-04 Outil de fraisage destiné au traitement du bois, des matériaux en bois, des matières plastiques ou des métaux légers Active EP3470190B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017123681.3A DE102017123681C5 (de) 2017-10-11 2017-10-11 Fräswerkzeug zum Bearbeiten von Holz, Holzwerkstoffen, Kunststoffen oder Leichtmetallen

Publications (2)

Publication Number Publication Date
EP3470190A1 true EP3470190A1 (fr) 2019-04-17
EP3470190B1 EP3470190B1 (fr) 2020-09-02

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EP18198655.5A Active EP3470190B1 (fr) 2017-10-11 2018-10-04 Outil de fraisage destiné au traitement du bois, des matériaux en bois, des matières plastiques ou des métaux légers

Country Status (3)

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EP (1) EP3470190B1 (fr)
CN (1) CN109648652B (fr)
DE (1) DE102017123681C5 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202000024274A1 (it) * 2020-10-14 2022-04-14 Eima S R L Assemblaggio di utensile rotativo

Citations (11)

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Publication number Priority date Publication date Assignee Title
DE7426183U (de) 1973-11-13 1974-11-07 Sanvito C & C Zusammengesetztes Fräswerkzeug, hauptsächlich zur Bearbeitung von Kanten
US4551165A (en) 1982-04-22 1985-11-05 National Research Development Corporation Mycorrhizal seed pellets
DE19915672A1 (de) 1999-04-07 2000-10-19 Homag Maschinenbau Ag Vorrichtung zum Bearbeiten von Kanten eines plattenförmigen Werkstückes mit mehreren Spanwerkzeugen
EP2011614A1 (fr) * 2007-07-06 2009-01-07 SCM GROUP S.p.A. Appareil de fraisage
DE202010010704U1 (de) 2010-07-27 2011-11-14 Ledermann Gmbh & Co. Kg Bearbeitungsvorrichtung
DE102011004536A1 (de) 2011-02-22 2012-08-23 Homag Holzbearbeitungssysteme Gmbh Fräsmotor mit mehreren Spindeln und einzeln austauschbaren Werkzeugen
DE102013010359A1 (de) 2012-06-22 2013-12-24 Biesse S.P.A. Fräsgruppe zur Bearbeitung von Platten aus Holz oder ähnlichem
DE102013226214A1 (de) 2013-12-17 2015-06-18 Homag Holzbearbeitungssysteme Gmbh Bearbeitungsvorrichtung
DE102014008033A1 (de) 2014-06-03 2015-12-03 Leitz Gmbh & Co. Kg Fräswerkzeug
EP2974840A1 (fr) * 2014-07-17 2016-01-20 Schiavon S.r.l. Outil rotatif a ecartement reglable
EP3354386A1 (fr) * 2017-01-25 2018-08-01 Ledermann GmbH & Co. KG Mandrin et système d'outil comprenant un mandrin

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DE102010009525A1 (de) * 2010-02-26 2011-09-01 Homag Holzbearbeitungssysteme Ag Vorrichtung zum Bearbeiten der Schmalflächen von bevorzugt plattenförmigen Werkstücken
DE102011004537A1 (de) * 2011-02-22 2012-08-23 Homag Holzbearbeitungssysteme Gmbh Bearbeitungsvorrichtung mit Tastrolle
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Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7426183U (de) 1973-11-13 1974-11-07 Sanvito C & C Zusammengesetztes Fräswerkzeug, hauptsächlich zur Bearbeitung von Kanten
US4551165A (en) 1982-04-22 1985-11-05 National Research Development Corporation Mycorrhizal seed pellets
DE19915672A1 (de) 1999-04-07 2000-10-19 Homag Maschinenbau Ag Vorrichtung zum Bearbeiten von Kanten eines plattenförmigen Werkstückes mit mehreren Spanwerkzeugen
EP2011614A1 (fr) * 2007-07-06 2009-01-07 SCM GROUP S.p.A. Appareil de fraisage
DE202010010704U1 (de) 2010-07-27 2011-11-14 Ledermann Gmbh & Co. Kg Bearbeitungsvorrichtung
DE102011004536A1 (de) 2011-02-22 2012-08-23 Homag Holzbearbeitungssysteme Gmbh Fräsmotor mit mehreren Spindeln und einzeln austauschbaren Werkzeugen
DE102013010359A1 (de) 2012-06-22 2013-12-24 Biesse S.P.A. Fräsgruppe zur Bearbeitung von Platten aus Holz oder ähnlichem
DE102013226214A1 (de) 2013-12-17 2015-06-18 Homag Holzbearbeitungssysteme Gmbh Bearbeitungsvorrichtung
DE102014008033A1 (de) 2014-06-03 2015-12-03 Leitz Gmbh & Co. Kg Fräswerkzeug
EP2974840A1 (fr) * 2014-07-17 2016-01-20 Schiavon S.r.l. Outil rotatif a ecartement reglable
EP3354386A1 (fr) * 2017-01-25 2018-08-01 Ledermann GmbH & Co. KG Mandrin et système d'outil comprenant un mandrin

Also Published As

Publication number Publication date
CN109648652A (zh) 2019-04-19
DE102017123681B4 (de) 2020-01-09
DE102017123681A1 (de) 2019-04-11
CN109648652B (zh) 2022-03-08
EP3470190B1 (fr) 2020-09-02
DE102017123681C5 (de) 2022-01-27

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