WO2011135447A1 - Outil de fraisage avec profil amélioré pour arrondir angulairement les bords de panneaux - Google Patents

Outil de fraisage avec profil amélioré pour arrondir angulairement les bords de panneaux Download PDF

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Publication number
WO2011135447A1
WO2011135447A1 PCT/IB2011/000925 IB2011000925W WO2011135447A1 WO 2011135447 A1 WO2011135447 A1 WO 2011135447A1 IB 2011000925 W IB2011000925 W IB 2011000925W WO 2011135447 A1 WO2011135447 A1 WO 2011135447A1
Authority
WO
WIPO (PCT)
Prior art keywords
milling tool
panels
edges
thickness
central portion
Prior art date
Application number
PCT/IB2011/000925
Other languages
English (en)
Inventor
Mauro Sandon
Original Assignee
Fravol Export S.R.L.
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 Fravol Export S.R.L. filed Critical Fravol Export S.R.L.
Priority to DE112011101513.5T priority Critical patent/DE112011101513B4/de
Publication of WO2011135447A1 publication Critical patent/WO2011135447A1/fr

Links

Classifications

    • 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
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C3/00—Milling particular work; Special milling operations; Machines therefor
    • B23C3/12—Trimming or finishing edges, e.g. deburring welded corners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/02—Milling-cutters characterised by the shape of the cutter
    • B23C5/12—Cutters specially designed for producing particular profiles
    • 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
    • B27G13/12—Cutter blocks; Other rotary cutting tools for profile cutting

Definitions

  • the present invention relates to a milling tool with improved profile for angularly rounding the edges of panels according to the preamble of the main claim.
  • the milling tool in question is intended to perform an angular joining and rounding operation on the corners of the edges of the panels so as to join together continuously the mutually perpendicular sides of the said panels.
  • the panels are usually finished by applying strips which form the edges of the panels and which are then machined so as to round their corners with the desired profiles.
  • edging machines machines for angularly rounding the edges of panels, referred to below as “edging machines”, have been introduced onto the market, said machines being able to perform automatically complete rounding of the edges once mounted.
  • the tool according to the present invention is therefore intended to be advantageously used on these edging machines, namely on panel edging machines, which may also be very complex, being equipped with various workstations arranged in series and comprising for example an end-butting unit, milling unit, levelling unit, gluing unit, trimming unit, edging unit or other units.
  • Automatic machines are known in the market where a milling tool is able to follow the panels during their displacement between an entry gate and an exit gate and perform the angular rounding also of the corners which are associated with the two end sides of the advancing panels.
  • the edging tools have a curved circular profile with a radius of curvature equal to the thickness of the edge so as to join together correctly the two 90- degree sides of the panel, one of which is the top or bottom side and the other one a lateral or end side.
  • a milling cutter with a radius of curvature of 2 mm is used.
  • the ends of the curved profile of the milling cutter are provided with clearances inclined usually at an angle of 5-15 degrees and preferably 10 degrees so as to allow the tool to mill the edge of the panel without the risk of scoring its surfaces and ruining them.
  • the thickness of the edges to be applied to the panels to be rounded may vary usually from 0.4 mm to 3 mm.
  • the patent US 2003/106613 discloses a milling tool 1 for angularly rounding the edges of panels, which is provided with a substantially disc-shaped body centrally fixed to a rotating spindle and having a peripheral profile provided with inclined portions for the milling tool clearance.
  • Several milling blades arranged at regular intervals are mounted on the peripheral profile of the support body, along the circumference of said peripheral profile.
  • the simpler edging machines are equipped with the possibility of displacing the milling tool along an adjusting axis so as to allow the tangency with at least one side of the panel to be maintained upon variation in the thickness of the edge which is applied.
  • the other sides of the panel is, however, no longer correctly joined to the edge, with the drawback that a discontinuous line is visible, this not being appreciated by the market from an aesthetic point of view.
  • milling tools provided with multiple profiles having different radii of curvature have been developed.
  • the latter are mounted on edging machines provided with two mutually perpendicular adjusting axes.
  • edging machines provided with two mutually perpendicular adjusting axes.
  • the problem forming the basis of the present invention is therefore to overcome the drawbacks of the known solutions by providing a milling tool with improved profile for angularly rounding the edges of panels, able to round in an optimum manner the corners of the edges of the panels of different thickness without discontinuous lines being visible at the points where the sides of each panel are connected together.
  • Another object of the present invention is to provide a milling tool which can be produced at a low cost.
  • a further object of the present invention is to provide a milling tool which is constructionally simple and operationally entirely reliable.
  • FIG. 1 shows in schematic form a side view of a machine for angularly rounding panels, provided with a milling tool according to the present invention
  • FIG. 2 is a geometric drawing of the profile of the milling tool shown in a cross- sectional side view performed along a central diametral plane;
  • Figures 3 A and 3B show in schematic form two diametrally sectioned views of an example of a milling tool according to the invention, Figure 3A showing only the contour of the milling cutter and Figure 3B showing the milling tool in cross-section adjacent to a panel portion.
  • FIGS. 4A and 4B show an enlarged profile of an example of a milling tool according to the invention, associated with two different-thickness edges of respective panels.
  • edges B are applied, in a manner which is per se entirely conventional, to the periphery of the panels P by means of an intervening layer of glue which a dispensing device removes from a containing tank.
  • the glue is generally of the heat-meltable (EVA) type with a heat-reversible reaction, or of the polyurethane type, with a non heat-reversible reaction.
  • EVA heat-meltable
  • polyurethane polyurethane
  • the milling tool 1 in question may be used on a dedicated edging machine or may be provided on more complex edging machines for edging panels, where the edging machine forms an operating unit in series with other operating units such as an end- butting unit, a milling unit, a levelling unit, a gluing unit, a trimming unit or other units.
  • the milling tool 1 may be mounted on an edging machine intended to round the corners of the front and rear edges of panels as described in patent application IT PD2005A000120, in particular from page 5, line 17, to page 10, line 20, which are regarded as being included in the present patent and are specifically referred to.
  • the machine 2 shown in the accompanying figures, has in an entirely conventional manner, means for feeding the panels P, in particular made of chipboard, MDF or the like (not shown).
  • These means usually for example consist of a track-type conveyor belt which is able to feed the panels P individually in a horizontal position, in succession with each other, between an entry gate and an exit gate of the edging machine 2.
  • the support structure of the machine 2 is also provided with a milling unit 3 which has a motor 4 having, keyed onto its rotating spindle 5, the milling tool 1 according to the present invention.
  • the milling tool 1 is provided with a steel support body 6, with a substantially disc-shaped form, fixed centrally to the rotating spindle 5.
  • the outer perimeter of the support body 6 has, formed therein, a peripheral profile 7 with a curved form having its concavity directed towards the front so as to receive, in a position parallel to the axis of rotation X of the milling tool 1, a panel P to be milled on a corner A of its edge B.
  • the milling tool 1 rotates about its axis of rotation X, perpendicular to the direction of feeding Y of the panels P, and intercepts the latter at a corner A of the edge B so as to perform rounding thereof.
  • the milling tool 1 is intended to mill panels P having an edge B with a thickness varying between a first thickness SI and a second thickness S2 greater than the first thickness.
  • the peripheral profile 7 is provided at its end, in a manner entirely usual per se, with inclined portions 8 for the clearance of the milling tool 1.
  • the inclination is in the region of 10° and allows the tool to have a certain machining tolerance so that it does not score and damage the sides F of the panel P.
  • the peripheral profile 7 is shaped so as to define, in a symmetrical diametral cross-sectional plane, a curve formed by:
  • the lateral portions 700 are formed by arcs of a circumference which are substantially tangentially connected to the central portion 70.
  • the three portions are formed by arcs of circumferences with their centres at CI (central portion) and C2 (lateral portions), it being understood, however, that they may be similarly formed by curves which also differ slightly from perfect arcs of a circumference, while it is still possible to interpret them as having a mean radius of curvature which may be referred to.
  • the peripheral profile 7 is symmetrical with respect a radius bisecting its subtended angle, with therefore the two lateral portions 700 identical to each other.
  • the centre CI of the radius of curvature Rl of the central portion 70 therefore lies on this bisecting radius, while the two centres C2 of the radius of curvature R2 of the two lateral portions 700 lie with mirror symmetry relative to the bisecting radius, namely equally spaced from the bisecting radius.
  • the range of thicknesses of the edge B of the panel P in which the milling tool 1 is able to operate will lie within 2 mm, since in the case of panels with edges of widely varying thickness the tool 1 must be replaced with another tool 1 having a different peripheral profile 7.
  • the central portion 70 of the peripheral profile 7 defines a projecting convexity 9 with respect to the ideal arc of curvature 9' which would be defined by a perfectly circular rounded line.
  • This projecting convexity 9 is widened so as to be oriented in the direction of the tangent to the perpendicular sides F of the panel P to be joined together, by means of the lateral portions 700 of the peripheral profile 7.
  • the central portion 70 of the peripheral profile 7 defines a flattened convexity 10 with respect to the ideal arc of curvature 10' which would be defined by a perfectly circular rounded line.
  • This flattened convexity 10 is widened so as to be oriented in the direction of the tangent to the perpendicular sides F of the panel P to be joined together, by means of the lateral portions 700 of the peripheral profile 7.
  • the central portion 70 may extend substantially so as to join together the two perpendicular sides of the panel P without having to use for this purpose the lateral portions 700 of the peripheral profile 7, which act as inclined portions for the clearance of the milling tool.
  • the circle arcs connected to form the peripheral profile 7 are three in number.
  • a front coupling device 20 and vertical coupling device 21 are provided, the latter being formed preferably by an idle disc which is free to rotate with its axis parallel to the axis of the tool 1.
  • Pneumatic actuators are provided in order to keep the two coupling devices 20 and 21 constantly pressed against the panel and thus ensure the correct working position of the milling tool 1.
  • the milling unit 3 is provided with a support 30 consisting of a plate on which a milling head 33 is mounted and which supports the tool 1 and the two coupling devices 20 and 21.
  • the position of the milling head 33 may be adjusted in mutually perpendicular directions by displacing said head along the first and second guides 31, 32.
  • the milling head 33 in the case where it is required to mill the edges B with a different thickness S, the milling head 33 must be displaced along the two guides so as to centre it with respect to the edge B with the new thickness.
  • the milling tool 1 according to the invention is simple and inexpensive to manufacture and operationally entirely reliable.
  • the milling tool allows the joining together, within certain limits, of panel edges of varying thickness, without the connection lines of the sides F of the panels P being visible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Milling Processes (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

L'invention concerne un outil de fraisage avec un profil amélioré pour arrondir angulairement des panneaux ayant des bords dont les épaisseurs sont comprises entre deux valeurs (S1, S2). L'outil de fraisage selon l'invention est muni d'un profil périphérique (7) pour fraiser les coins (A) des bords (B) des panneaux (P), formés de manière à définir une courbe dans un plan en section transversale diamétral symétrique formé par une portion centrale (70) ayant un premier rayon de courbure (R1) compris entre les deux valeurs d'épaisseur (S1, S2) des bords des panneaux, et par deux parties latérales (700) qui sont connectées de manière continue à la partie centrale (70), chacune ayant au moins un deuxième rayon de courbure (R2) supérieur à celui des deux épaisseurs (S1, S2).
PCT/IB2011/000925 2010-04-30 2011-04-29 Outil de fraisage avec profil amélioré pour arrondir angulairement les bords de panneaux WO2011135447A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112011101513.5T DE112011101513B4 (de) 2010-04-30 2011-04-29 Fräswerkzeug mit verbessertem Profil zum schrägen Runden der Ecken von Platten

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPD2010A000137A IT1399939B1 (it) 2010-04-30 2010-04-30 Utensile fresatore con profilo perfezionato per l'arrotondatura angolare di bordi di pannelli
ITPD2010A000137 2010-04-30

Publications (1)

Publication Number Publication Date
WO2011135447A1 true WO2011135447A1 (fr) 2011-11-03

Family

ID=43088073

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2011/000925 WO2011135447A1 (fr) 2010-04-30 2011-04-29 Outil de fraisage avec profil amélioré pour arrondir angulairement les bords de panneaux

Country Status (3)

Country Link
DE (1) DE112011101513B4 (fr)
IT (1) IT1399939B1 (fr)
WO (1) WO2011135447A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110076377A (zh) * 2019-05-09 2019-08-02 河南平原光电有限公司 一种提高钛合金材料槽腔圆角加工效率方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111085730A (zh) * 2019-12-18 2020-05-01 成都四威高科技产业园有限公司 一种精密装配零件圆角加工方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1044772A2 (fr) * 1999-04-07 2000-10-18 Homag Maschinenbau Ag Dispositif pour travailler des bords de pièces en forme de plaques avec plusieurs outils d'usinage
US20030106613A1 (en) 1999-09-17 2003-06-12 Kurt Kalmbach Machining assembly including a rotating tool and exhaust hood
DE10323806B3 (de) * 2003-05-23 2004-06-24 Ima Klessmann Gmbh Holzbearbeitungssysteme Verfahren und Bearbeitungsaggregat zum Bündigfräsen und Abziehen eines an plattenförmige Werkstücke angebrachten Kantenbandes

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1092887B (it) 1978-02-28 1985-07-12 Stefani Spa G Dispositivo per arrotondare gli angoli e/o gli spigoli di un pannello in movimento,in particolare da abbinare ad una macchina bordatrice,tenonatrice e simile
DE4030138A1 (de) 1990-09-24 1992-03-26 Klessmann Ima Norte Maschfab Maschine zum anbringen und buendigfraesen von kantenstreifen
ITPD20050120A1 (it) 2005-05-02 2006-11-03 Fravol Exp Srl Dispositivo per l'arrotondatura angolare di pannelli
DE202007017278U1 (de) 2007-12-11 2008-03-13 Heßler, Christoph, Dr. Tragbare Maschine zur Eckenbearbeitung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1044772A2 (fr) * 1999-04-07 2000-10-18 Homag Maschinenbau Ag Dispositif pour travailler des bords de pièces en forme de plaques avec plusieurs outils d'usinage
US20030106613A1 (en) 1999-09-17 2003-06-12 Kurt Kalmbach Machining assembly including a rotating tool and exhaust hood
DE10323806B3 (de) * 2003-05-23 2004-06-24 Ima Klessmann Gmbh Holzbearbeitungssysteme Verfahren und Bearbeitungsaggregat zum Bündigfräsen und Abziehen eines an plattenförmige Werkstücke angebrachten Kantenbandes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110076377A (zh) * 2019-05-09 2019-08-02 河南平原光电有限公司 一种提高钛合金材料槽腔圆角加工效率方法

Also Published As

Publication number Publication date
DE112011101513B4 (de) 2021-12-23
DE112011101513T5 (de) 2013-02-21
ITPD20100137A1 (it) 2011-10-31
IT1399939B1 (it) 2013-05-09

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