EP2511045B1 - Machine de ponçage pour le ponçage de panneaux de bois ou analogue - Google Patents

Machine de ponçage pour le ponçage de panneaux de bois ou analogue Download PDF

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Publication number
EP2511045B1
EP2511045B1 EP20120164267 EP12164267A EP2511045B1 EP 2511045 B1 EP2511045 B1 EP 2511045B1 EP 20120164267 EP20120164267 EP 20120164267 EP 12164267 A EP12164267 A EP 12164267A EP 2511045 B1 EP2511045 B1 EP 2511045B1
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EP
European Patent Office
Prior art keywords
axis
sanding machine
around
machine according
drive drum
Prior art date
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Application number
EP20120164267
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German (de)
English (en)
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EP2511045A1 (fr
Inventor
Fabio Balducci
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Viet Italia Srl Con Unico Socio
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Viet Italia Srl Con Unico Socio
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/04—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces
    • B24B21/12—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces involving a contact wheel or roller pressing the belt against the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/20—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground
    • B24B7/28—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground for grinding wood

Definitions

  • the present invention relates to a sanding machine for sanding wood panels or the like.
  • the present invention relates to a sanding machine, as e.g. known from document EP-A1-2 253 428 , comprising a conveyor belt, which has an upper transport line defining a substantially horizontal support plane for at least one panel, and is adapted to move the panel forward beneath a sanding device comprising, in turn, an upper tensioning drum, a lower drive drum, and an abrasive belt which is wound in a ring shape around the tensioning drum and the drive drum so as to sand an upper face of the panel.
  • a sanding machine as e.g. known from document EP-A1-2 253 428 , comprising a conveyor belt, which has an upper transport line defining a substantially horizontal support plane for at least one panel, and is adapted to move the panel forward beneath a sanding device comprising, in turn, an upper tensioning drum, a lower drive drum, and an abrasive belt which is wound in a ring shape around the tensioning drum and the drive drum so as to
  • the drive drum generally comprises a support shaft, which has a given first longitudinal axis, and is provided with two eccentric ends coaxial to each other and to a second longitudinal axis parallel to the first axis; and a cylindrical sleeve, which extends around the support shaft coaxially to the first axis, and is rotationally coupled to the support shaft so as to rotate, with respect to the support shaft, around said first axis.
  • the drive drum is moved around the second axis between a lowered operating position, in which the abrasive belt is arranged in contact with the upper face of the panel, and a raised rest position, in which the abrasive belt disengages the panel, by means of an actuating cylinder which is connected to a support frame of the drive drum, and has an output rod connected to a crank splined on one of the eccentric ends of the supporting shaft.
  • the known sanding machines of the above-described type have few drawbacks mainly deriving from the fact that the abrasive belt removes a greater quantity of material than that expected when the thickness of the panel is greater than a nominal value, it removes a lesser quantity of material than that expected when the thickness of the panel is less than the nominal value, and does not remove any material when the thickness of the panel is less than a threshold value.
  • the object of the present invention is to provide a sanding machine for sanding wood panels or the like which is free from the above-described drawbacks and which is simple and cost-effective to be implemented.
  • numeral 1 indicates, as a whole, a sanding machine for sanding wood panels 2 or the like having a substantially parallelepiped shape.
  • Sanding machine 1 comprises a supporting frame 3, and an infeed device 4 comprising, in turn, a conveyor belt 5, which is wound in a ring shape around a pair of motorized pulleys 6 mounted so as to rotate around respective longitudinal axes 7 which are parallel to each other and to a horizontal direction 8, has an upper transport line defining a horizontal support plane P for at least one panel 2, and is adapted to move panel 2 forward in a direction 9 which is horizontal and transversal to direction 8.
  • Sanding machine 1 further comprises a sanding unit 10 comprising, in turn, an abrasive belt 11 wound in a ring shape around a lower drive drum 12 and an upper tensioning drum 13 of the known type, which is mounted so as to rotate around a longitudinal axis 14 thereof which is parallel to axes 7, and is movable, with respect to frame 3, in a direction 15 which is vertical and orthogonal to directions 8 and 9 between a lowered rest position and a raised operating position.
  • a sanding unit 10 comprising, in turn, an abrasive belt 11 wound in a ring shape around a lower drive drum 12 and an upper tensioning drum 13 of the known type, which is mounted so as to rotate around a longitudinal axis 14 thereof which is parallel to axes 7, and is movable, with respect to frame 3, in a direction 15 which is vertical and orthogonal to directions 8 and 9 between a lowered rest position and a raised operating position.
  • drum 12 comprises a support shaft 16, which has a longitudinal axis 17 parallel to axes 7 and 14, and is provided with two eccentric ends 18, which are coaxial to each other and to a longitudinal axis 19 parallel to axis 17, and are rotationally coupled to frame 3 so as to allow shaft 16 to rotate, with respect to frame 3, around axis 19.
  • Shaft 16 further comprises a crank 20, which is splined on one of the ends 18, and extends radially outwards from said end 18.
  • Drum 12 further comprises a cylindrical sleeve 21, which extends around shaft 16 coaxially to axis 17, and is rotationally coupled to shaft 16 so as to rotate, with respect to shaft 16 and under the thrust of an actuating device 22 of the known type, around said axis 17.
  • Drum 12 is movable around axis 19 between a lowered operating position, in which belt 11 is arranged in contact with an upper face 23 of panel 2, and a raised rest position, in which belt 11 disengages said face 23.
  • Drum 12 is moved, and normally kept, in its lowered operating position by gravity under the thrust of its own weight, and is moved from its lowered operating position to its raised rest position by an actuating device 24 ( figure 3 ) comprising a rocker arm 25 which is rotationally coupled to the crank 20 so as to rotate, with respect to shaft 16, around axis 19.
  • an actuating device 24 ( figure 3 ) comprising a rocker arm 25 which is rotationally coupled to the crank 20 so as to rotate, with respect to shaft 16, around axis 19.
  • Device 24 further comprises a first actuating cylinder 26, which is connected to frame 3, and has an output rod 27, which is connected to a first arm of the rocker arm 25, and is movable between a backward position ( figure 3 ) and an extracted position (not shown); and a second actuating cylinder 28, which is fixed to a second arm of the rocker arm 25, and has an output rod 29, which is provided with a free end adapted to be arranged in contact with crank 20, and is movable to and from a backward position ( figure 3 ).
  • drum 12 and device 24 will now be described with reference to figure 3 and starting when rod 27 is arranged in its forward extracted position, rod 29 is arranged in its backward position, and drum 12 is arranged in its raised rest position.
  • rocker arm 25 rotates around axis 19 in a clockwise direction
  • crank 20 and drum 12 rotate around axis 19 also in a clockwise direction by gravity under the thrust of the weight of drum 12, and drum 12 is arranged in its lowered operating position in contact with the upper face 23 of panel 2 independently of the effective thickness of said panel 2.
  • rod 29 When drum 12 is arranged in contact with panel 2, rod 29 is moved into a forward extracted position so as to exert on drum 12 a torque around axis 19, in any case lower than the torque with opposite sign which is exerted on drum 12 by the weight of said drum 12.
  • drum 12 oscillates around axis 19 in a clockwise direction under the thrust of its own weight when the thickness of panel 2 decreases, and in an anticlockwise direction under the thrust of panel 2 and cylinder 28 when the thickness of panel 2 increases.
  • rod 29 is again moved to its backward position, and rod 27 is again moved to its forward extracted position so as to rotate the rocker arm 25 in an anticlockwise direction and to allow rod 29 to move crank 20 in an anticlockwise direction around axis 19 and drum 12 to its raised rest position.
  • device 24 comprises a limit member 30, which is mounted to the rocker arm 25 on the opposite side to cylinder 28 with respect to crank 20, is movable with respect to the rocker arm 25 to and from cylinder 28 so as to selectively control the oscillation of drum 12 around axis 19, and furthermore is movable to a limit position (not shown), in which member 30 locks crank 20 against the rod 29 of cylinder 28 so as to prevent it from oscillating around axis 19.
  • cylinder 28 is eliminated and replaced with a shock absorber device comprising a pushing member cooperating with crank 20 and a spring interposed between the rocker arm 25 and said pushing member.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Claims (11)

  1. Machine de ponçage pour le ponçage de panneaux de bois (2) ou analogues comprenant un dispositif d'alimentation (4), qui définit un plan de support (P) pour au moins un panneau (2), et est apte à faire avancer le panneau (2) dans une direction donnée (9) ; un dispositif de ponçage (10) monté au-dessus du plan de support (P) et comprenant, à son tour, un tambour d'entraînement (12), un tambour de tension (13), et une courroie abrasive (11) qui est enroulée sous forme d'anneau autour desdits tambours d'entraînement et de tension (12, 13), de manière à poncer une face supérieure (23) du panneau (2), le tambour d'entraînement (12) comprenant un arbre de support (16), qui présente un premier axe longitudinal (17), et est pourvu de deux extrémités excentriques (18) coaxiales entre elles et avec un second axe longitudinal (19) parallèle au premier axe (17), et un manchon cylindrique (21) qui est monté de manière rotative sur l'arbre de support (16) ; un premier dispositif d'actionnement (22) pour déplacer le manchon cylindrique (21) autour du premier axe (17) ; et un second dispositif d'actionnement (24) pour déplacer le tambour d'entraînement (12), par rapport au plan de support (P), autour du second axe (19) d'une position de fonctionnement abaissée à une position de repos relevée ; et caractérisée en ce que le tambour d'entraînement (12) et le second dispositif d'actionnement (24) sont connectés entre eux de manière à permettre, en service, que le tambour d'entraînement (12) se déplace autour du second axe (19) en fonction d'un profil de ladite face supérieure (23).
  2. Machine de ponçage selon la revendication 1, dans laquelle lesdits premier et second axes (17, 19) sont agencés de manière à permettre que le poids du tambour d'entraînement (12) déplace le tambour d'entraînement (12) jusqu'à sa position de fonctionnement abaissée, et normalement l'y maintienne.
  3. Machine de ponçage selon la revendication 1 ou 2 et comprenant, en outre, un dispositif amortisseur (28), qui est apte à permettre au tambour d'entraînement (12) d'osciller autour du second axe (19) en fonction du profil de ladite face supérieure (23).
  4. Machine de ponçage selon l'une quelconque des revendications précédentes, dans laquelle le second dispositif d'actionnement (24) comprend des moyens de poussée (29) qui sont aptes à être agencés en contact avec l'une desdites extrémités excentriques (18), et sont mobiles de manière à déplacer le tambour d'entraînement (12) de sa position de fonctionnement abaissée à sa position de repos relevée.
  5. Machine de ponçage selon la revendication 4, dans laquelle le second dispositif d'actionnement (24) comprend, en outre, des moyens d'actionnement (25) pour déplacer les moyens de poussée (29), et un dispositif amortisseur (28) qui s'intercale entre les moyens d'actionnement (25) et les moyens de poussée (29).
  6. Machine de ponçage selon l'une quelconque des revendications précédentes, dans laquelle le second dispositif d'actionnement (24) comprend un premier cylindre d'actionnement (28), qui présente une première tige de sortie (29) apte à être agencée en contact avec l'une desdites extrémités excentriques (18), et est mobile de manière à permettre à la première tige de sortie (29) de déplacer le tambour d'entraînement (12) de sa position de fonctionnement abaissée à sa position de repos relevée.
  7. Machine de ponçage selon la revendication 6, dans laquelle la première tige de sortie (29) est mobile d'une position arrière vers une position sortie avant, de manière à exercer sur l'arbre de support (16) un couple donné autour du second axe (19).
  8. Machine de ponçage selon la revendication 7 et comprenant, en outre, un dispositif de commande pour commander sélectivement le fonctionnement du premier cylindre d'actionnement (28) et, par conséquent, la poussée exercée par la première tige de sortie (29) sur l'arbre de support (16).
  9. Machine de ponçage selon l'une quelconque des revendications 6 à 8, dans laquelle le second dispositif d'actionnement (24) comprend, en outre, un mécanisme à manivelle (25) pour déplacer le premier cylindre d'actionnement (28) autour du second axe (19).
  10. Machine de ponçage selon la revendication 9, dans laquelle le second dispositif d'actionnement (24) comprend, en outre, un bras oscillant (25), qui est monté de manière à tourner, par rapport à l'arbre de support (16), autour du second axe (19), et présente un premier bras, auquel est fixé le premier cylindre d'actionnement (28) ; et un second cylindre d'actionnement (26), qui est connecté à un cadre de support (3) du tambour d'entraînement (12), et présente une seconde tige de sortie (27), qui est connectée à un second bras du bras oscillant (25), et est mobile entre une position arrière et une position sortie avant, de manière à déplacer le bras oscillant (25) autour du second axe (19).
  11. Machine de ponçage selon l'une quelconque des revendications 6 à 10, dans laquelle l'arbre de support (16) comprend, en outre, une manivelle (20), qui est couplée d'une manière angulairement fixe à l'une desdites extrémités excentriques (18), et est apte à se mettre en prise avec la première tige de sortie (29).
EP20120164267 2011-04-15 2012-04-16 Machine de ponçage pour le ponçage de panneaux de bois ou analogue Active EP2511045B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000200A ITBO20110200A1 (it) 2011-04-15 2011-04-15 Macchina levigatrice per la levigatura di pannelli di legno o simili

Publications (2)

Publication Number Publication Date
EP2511045A1 EP2511045A1 (fr) 2012-10-17
EP2511045B1 true EP2511045B1 (fr) 2015-04-01

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EP (1) EP2511045B1 (fr)
IT (1) ITBO20110200A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
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CN107803713A (zh) * 2017-09-30 2018-03-16 成都千佳世纪家具有限责任公司 实木制家具的表面处理方法

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CN107186588A (zh) * 2017-07-13 2017-09-22 安徽盛美金属科技有限公司 一种金属板打磨抛光机的升降机构
CN108857594B (zh) * 2018-06-29 2024-05-31 安徽扬子地板股份有限公司 仿古地板及其表面处理方法、砂光机
CN108673010B (zh) * 2018-08-13 2023-07-18 南京皓焜自动化科技有限公司 一种用于机器人焊接的工作台
CN112157546B (zh) * 2020-10-28 2022-06-03 史东旭 一种圆形木板边缘打磨装置
CN112706007B (zh) * 2021-01-06 2022-07-01 广州敏实汽车零部件有限公司 一种打磨设备及应用其的打磨方法
CN114393483A (zh) * 2022-01-28 2022-04-26 陈国发 一种木板单面打磨设备
CN114486450B (zh) * 2022-02-24 2023-12-22 山东省国土空间生态修复中心 一种岩矿鉴定用矿物样品处理装置
CN115446705B (zh) * 2022-10-21 2024-03-08 唐山市汉沽管理区宅本木业有限公司 一种木材打磨装置及其使用方法

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DE1477943A1 (de) * 1964-09-25 1969-07-31 Weber Dipl Ing Heinz Breitbandschleifmaschine mit Kontaktwalze
US3415017A (en) * 1965-05-13 1968-12-10 Zech Murray Corp Apparatus for finishing workpieces under controlled pressures
IT1394415B1 (it) * 2009-05-18 2012-06-15 Scm Group Spa Metodo per sagomare una superficie di un oggetto e apparato sagomatore

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107803713A (zh) * 2017-09-30 2018-03-16 成都千佳世纪家具有限责任公司 实木制家具的表面处理方法

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ITBO20110200A1 (it) 2012-10-16
EP2511045A1 (fr) 2012-10-17

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