EP1371448B1 - Machine à meuler à axe vertical - Google Patents

Machine à meuler à axe vertical Download PDF

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Publication number
EP1371448B1
EP1371448B1 EP03013283A EP03013283A EP1371448B1 EP 1371448 B1 EP1371448 B1 EP 1371448B1 EP 03013283 A EP03013283 A EP 03013283A EP 03013283 A EP03013283 A EP 03013283A EP 1371448 B1 EP1371448 B1 EP 1371448B1
Authority
EP
European Patent Office
Prior art keywords
axis
vertical
machine
workpiece
grinding
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.)
Expired - Lifetime
Application number
EP03013283A
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German (de)
English (en)
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EP1371448A1 (fr
Inventor
Claudio Tacchella
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.)
TACCHELLA MACCHINE SpA
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TACCHELLA MACCHINE SpA
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Classifications

    • 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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/04—Headstocks; Working-spindles; Features relating thereto
    • 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
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
    • B24B5/04—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces externally
    • B24B5/047—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces externally of workpieces turning about a vertical axis

Definitions

  • the present invention relates to a vertical-axis grinding machine.
  • Grinding machines are known (as shown in Figure 1 ) which comprise a workpiece support and rotation device for supporting and rotating a workpiece (shown by the dash line) about a horizontal axis (axis C); and at least one grinding head having at least one rotary wheel movable to and from the workpiece to remove surface portions of the workpiece rotating about horizontal axis C.
  • the grinding head is movable reversibly to and from the workpiece along a horizontal axis (axis X) perpendicular to axis C, and reversibly along a horizontal axis Z parallel to axis C to machine different axial portions of the workpiece.
  • the head also rotates about a vertical axis B to adjust the tilt angle of the wheel with respect to axis C and the workpiece; and the reference system is completed by a vertical axis Y perpendicular to horizontal axes X and Z.
  • GB-A-544 213 discloses a grinding machine as defined in the preamble of claim 1.
  • Number 1 in Figure 2 indicates as a whole a vertical-axis grinding machine in accordance with the teachings of the present invention.
  • grinding machine 1 comprises a workpiece support and rotation device 3 for supporting and rotating a workpiece 4 for grinding about a first axis B; and at least one grinding head 6 having at least one rotary grinding wheel 7 movable to and from workpiece 4 to remove surface portions of and so grind workpiece 4.
  • workpiece support and rotation device 3 defines a vertical or substantially vertical first axis B, i.e. sloping by only a few (e.g. 1-10) degrees with respect to the vertical.
  • workpiece support and rotation device 3 comprises a vertical supporting structure 9 having a bottom end fixed firmly to a flat rectangular base 10, and a top end from which projects a horizontal supporting structure 11 perpendicular to vertical supporting structure 9.
  • Vertical supporting structure 9 is bounded at the front by a flat rectangular wall 13, along which extends a straight vertical guide 15 fixed firmly to vertical supporting structure 9.
  • a bottom slide 17 can be set to a predetermined number of stable positions along straight vertical guide 15.
  • Slide 17 is fitted with a parallelepiped-shaped body 18, which houses an elastic supporting device (not shown in detail) for supporting a centre 20 extending outside body 18, upwards towards structure 11, and coaxially with axis B.
  • an elastic supporting device (not shown in detail) for supporting a centre 20 extending outside body 18, upwards towards structure 11, and coaxially with axis B.
  • the elastic supporting device can be set to two operating positions: a full-lock position, in which centre 20 is connected rigidly to body 18 and performs no movement along vertical axis B; and a second workpiece-support position, in which centre 20 is connected to an elastic member (not shown) housed inside body 18 and permitting a limited amount of movement (a few millimetres) of centre 20 along axis B and in opposition to the elastic member.
  • Centre 20 is made of metal (e.g. high-tensile steel), terminates with a conical end 20a, and engages a bottom end 4a of workpiece 4, with the end portion of conical end 20a inserted inside a conical locating hole (not shown) formed in an end wall of workpiece 4 and coaxial with axis B.
  • metal e.g. high-tensile steel
  • Horizontal supporting structure 11 carries a substantially parallelepiped-shaped body 22 facing parallelepiped-shaped body 18 and supporting a known spindle 24 coaxial with axis B and which engages in known manner a top end portion 4b of workpiece 4.
  • Parallelepiped-shaped body 22 also carries an electric motor 26 extending upwards and for rotating spindle 24 via a transmission (not shown) housed in body 22.
  • Grinding head 6 is carried by a guide and support structure 30 allowing head 6 a number of translation/rotation movements, including:
  • guide and support structure 30 comprises a vertical column member having a righttriangular cross section and defined by a first front rectangular wall 32 alongside and substantially coplanar with wall 13, a second lateral rectangular wall 33 perpendicular to the first wall, and a rear rectangular wall 34.
  • First rectangular wall 32 carries a first straight vertical guide 36, along which a first slide 37 travels along vertical axis Y. More specifically, guide 36 is defined by two spaced, parallel rails 38a, 38b extending along a central portion of front rectangular wall 32. Slide 37 is roughly parallelepiped-shaped, has two seats facing front wall 32 and housing respective rails 38a, 38b, and is moved along guide 36 by known actuating means (e.g. electric motors). First slide 37 carries a second straight guide 40 aligned with axis X and supporting a second slide 44, which is movable linearly and reversibly along second guide 40 by known actuating means (not shown).
  • actuating means e.g. electric motors
  • Head 6 comprises a central parallelepiped-shaped body 45 connected to a central portion of second slide 44 by an articulated joint 47 enabling central parallelepiped-shaped body 45 to move about axis Z, which is also perpendicular to second slide 44, thus forming an axis of rotation C rotating about axis Z.
  • central body 45 On a first side, central body 45 carries a first lateral parallelepiped-shaped body 48 housing the electric motor and transmission (not shown) for driving a first disk wheel 7a rotating about an axis D1 perpendicular to axis Z; and, on a second side, central body 45 carries a second lateral parallelepiped-shaped body 49 housing the electric motors and transmissions (not shown) for driving a second disk wheel 7b and a third disk wheel 7c located at opposite ends of second body 49 and both rotating about an axis D2 perpendicular to axis Z and parallel to axis D1.
  • the workpiece is placed (e.g. by means of a pickup and conveying device having a robotized arm - not shown) with bottom end 4a resting on centre 20, so that conical end 20a engages the locating hole in workpiece 4.
  • the position of workpiece 4 is adjusted so that the axis of workpiece 4 is coincident with axis B of machine 1; spindle 24 is then connected to the top end 4b of workpiece 4 in known manner not shown; and the pickup and conveying device (not shown) releases workpiece 4 and is withdrawn so that grinding of workpiece 4 can commence.
  • an electronic control unit starts electric motor 26 to rotate workpiece 4 about axis B.
  • the electronic unit of machine 1 also starts the electric motors controlling rotation of one or more of wheels 7a, 7b and 7c, and operates the actuators governing reversible linear movement of first slide 37 and second slide 44, and rotation of head 6 about axis Z.
  • Head 6 can thus move and approach workpiece 4 so that at least one of wheels 7a, 7b and 7c contacts the surface of workpiece 4 to remove material and so grind workpiece 4.
  • the movement of slide 37 along axis Y provides for positioning the wheel at different heights and so machining different axial portions of workpiece 4; the movement of slide 44 along axis X provides for moving the wheel towards or away from the workpiece; and rotation of the head about axis Z provides for tilting the wheel plane with respect to the axis of workpiece 4, thus enabling a complete grinding cycle of the workpiece.
  • the Figure 2 machine can be controlled by an electronic unit 50 comprising a video terminal 51 and a keyboard 52, and for controlling rotation of workpiece 4 by electric motor 26, and the movement along axes X and Y and rotation about axis Z of head 6.
  • an electronic unit 50 comprising a video terminal 51 and a keyboard 52, and for controlling rotation of workpiece 4 by electric motor 26, and the movement along axes X and Y and rotation about axis Z of head 6.
  • the electronic unit reads a number of coded instructions controlling a sequence of workpiece and head movements with respect to the above machine axes to perform a complete machining cycle.
  • coded instructions are designed for a conventional machine (i.e. of the type in Figure 1 )
  • electronic unit 50 may comprise a translating circuit (software or hardware) for converting conventional grinding machine control data into machine 1 data by translating the reference systems of the two machines, whereby:
  • Figure 3 shows a variation 1a of the Figure 2 machine, which comprises a workpiece support and rotation device 3 of the type described above; a grinding head 6 located on a first (right) side of workpiece support and rotation device 3, and having the structure described above; and an auxiliary grinding head 6a located on a second (left) side of workpiece support and rotation device 3.
  • Auxiliary grinding head 6a is carried by a guide and support structure 30a located on a second side of workpiece support and rotation device 3, and having a specular structure with respect to guide and support structure 30 described above.
  • Auxiliary head 6a is thus movable along a horizontal axis X1 parallel to axis X, along a vertical axis Y1 parallel to axis Y and perpendicular to axis X1, and along an axis Z1 parallel to axis Z and perpendicular to the plane containing axes X1 and Y1.
  • Grinding machine 1a may perform grinding operations using only one of heads 6, 6a; or both heads 6, 6a may simultaneously machine axially spaced portions of workpiece 4.
  • Figure 4 shows, schematically, a further variation 1b of the Figure 2 grinding machine.
  • Machine 1b comprises a workpiece support and rotation device substantially similar to device 3, and for rotating workpiece 4 about a vertical axis B.
  • Grinding machine 1b comprises a number of heads 6, 6a, 6b, 6c (four in the example shown, but which may obviously differ in number) located on a first and second side of device 3.
  • a first number of heads two heads 6 and 6a in the example shown
  • a second number of heads are carried by the same guide and support structure 30a on a second side of device 3.
  • Heads 6, 6a, 6b, 6c are movable along respective horizontal axes X, X1, X2, X3 to and from workpiece 4, are movable along respective vertical axes Y, Y1, Y2, Y3 to machine different axial portions of workpiece 4, and each head 6, 6a, 6b, 6c can also rotate about a respective axis Z, Z1, Z2, Z3 perpendicular to the respective pair of axes X,Y, X1,Y1, X2,Y2, X3,Y3.
  • at least one of heads 6, 6a, 6b, 6c has at least one grinding wheel 7; and at least one of heads 6, 6a, 6b, 6c has tools 52 for performing other than grinding operations, e.g. milling and/or turning and/or drilling.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Crushing And Grinding (AREA)
  • Liquid Crystal Substances (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Claims (12)

  1. Machine à meuler comprenant un dispositif de support et de rotation de pièce (3) pour supporter et faire tourner une pièce (4) à meuler autour d'un premier axe B, et au moins un porte-meule (6) ayant au moins une meule (7 ; 7a, 7b, 7c) pouvant être rapproché et éloigné de la pièce pour retirer des portions de surface de la pièce (4) et ainsi la meuler ;
    ledit dispositif de support et de rotation de pièce (3) définissant un premier axe B essentiellement vertical et comprenant :
    - une structure de support verticale (9) ;
    - une pointe de centrage (20), portée par ladite structure de support verticale (9), qui est coaxiale audit premier axe vertical B et qui entre en prise avec une première extrémité de ladite pièce (4) ; et
    - une broche (24), portée par ladite structure de support verticale (9), qui est coaxiale audit premier axe vertical B et qui entre en prise avec une deuxième extrémité de ladite pièce (4) ;
    caractérisée en ce que ladite pointe de centrage (20) est accouplée à un dispositif de support élastique qui peut être réglé dans deux positions de fonctionnement : une première position de blocage complet, dans laquelle ladite pointe de centrage (20) est accouplée fixement à ladite structure de support verticale (9) et ne fait aucun mouvement le long du premier axe vertical B ; et une deuxième position de support de pièce, dans laquelle ladite pointe de centrage (20) est accouplée à un organe élastique pour permettre un déplacement limité de ladite pointe de centrage (20) le long dudit premier axe vertical B.
  2. Machine selon la revendication 1, dans laquelle ladite pointe de centrage (20) est située en dessous de ladite broche (24).
  3. Machine selon la revendication 1 ou 2, dans laquelle ladite structure de support verticale comprend un guide vertical rectiligne (15) et un coulisseau (17) supportant ladite pointe de centrage (20) ; ledit coulisseau (17) pouvant être positionné dans un nombre prédéterminé de positions stables le long dudit guide vertical rectiligne (15).
  4. Machine selon l'une quelconque des revendications précédentes, dans laquelle une structure de guidage et de support (30) permet audit porte-meule (6) un certain nombre de mouvements de translation/rotation, comprenant :
    - un mouvement de translation linéaire dans des sens opposés le long d'un axe vertical Y parallèle audit premier axe vertical B ;
    - un mouvement de translation linéaire dans des sens opposés le long d'un axe horizontal X perpendiculaire audit axe vertical Y ;
    - un mouvement de rotation angulaire dans des sens de rotation opposés autour d'un axe Z perpendiculaire au plan contenant lesdits axes horizontal X et vertical Y.
  5. Machine selon la revendication 4, dans laquelle ladite structure de guidage et de support (30) comprend :
    - un organe vertical supportant un premier guide rectiligne (36) et un premier coulisseau (37) pouvant être déplacé de manière réversible par des moyens d'entraînement le long dudit premier guide rectiligne (36) et dudit axe vertical Y ;
    - un deuxième guide rectiligne (40) porté par ledit premier coulisseau (37) et un deuxième coulisseau (44) pouvant être déplacé par des moyens d'entraînement le long dudit deuxième guide rectiligne (40) et dudit axe horizontal X ;
    ledit porte-meule (6) étant porté par ledit deuxième coulisseau (44) et pouvant être déplacé angulairement par rapport audit deuxième coulisseau (44), autour dudit axe Z.
  6. Machine selon la revendication 4 ou 5, dans laquelle ledit porte-meule comprend au moins une meule (7a, 7b, 7c) pouvant être déplacée angulairement autour d'un axe de rotation (D1, D2) transversal audit axe Z.
  7. Machine selon la revendication 6, dans laquelle ledit porte-meule comprend au moins une première meule (7a) et au moins une deuxième meule (7b, 7c), qui peuvent être déplacées angulairement autour d'un premier et d'un deuxième axes de rotation respectifs (D1, D2) espacés l'un de l'autre, transversaux audit axe Z, et situés de part et d'autre dudit axe Z.
  8. Machine selon l'une quelconque des revendications précédentes, dans laquelle ledit porte-meule (6) est situé sur un premier côté dudit dispositif de support et de rotation de pièce (3) ; un porte-meule auxiliaire (6a) étant situé sur un deuxième côté dudit dispositif de support et de rotation de pièce (3).
  9. Machine selon la revendication 8, dans laquelle une structure de guidage et de support auxiliaire (30a) permet audit porte-meule auxiliaire (6a) un certain nombre de mouvements de translation/rotation, comprenant :
    - un mouvement de translation linéaire dans des sens opposés le long d'un axe vertical Y1 parallèle audit premier axe vertical B ;
    - un mouvement de translation linéaire dans des sens opposés le long d'un axe horizontal X1 perpendiculaire audit axe vertical Y1 ;
    - un mouvement de rotation angulaire dans des sens de rotation opposés autour d'un axe Z1 perpendiculaire au plan contenant lesdits axes horizontal X1 et vertical Y1.
  10. Machine selon l'une quelconque des revendications précédentes, dans laquelle au moins un porte-meule auxiliaire (6a, 6b, 6c) exécute sur ladite pièce des opérations d'usinage autres que des opérations de meulage et, en particulier, des opérations de fraisage et/ou de tournage et/ou de perçage.
  11. Machine selon la revendication 10, dans laquelle une structure de guidage et de support (30, 30a) permet audit porte-meule auxiliaire (6a, 6b, 6c) un certain nombre de mouvements de translation/rotation, comprenant :
    - un mouvement de translation linéaire dans des sens opposés le long d'un axe vertical (Y1, Y2, Y3) parallèle audit premier axe vertical B ;
    - un mouvement de translation linéaire dans des sens opposés le long d'un axe horizontal (X1, X2, X3) perpendiculaire audit axe vertical (Y1, Y2, Y3) ;
    - un mouvement de rotation angulaire dans des sens de rotation opposés autour d'un axe (Z1, Z2, Z3) perpendiculaire au plan contenant lesdits axes horizontaux et verticaux.
  12. Machine selon l'une quelconque des revendications précédentes, dans laquelle une structure de guidage et de support (30) permet audit porte-meule (6) un certain nombre de mouvements de translation/rotation, comprenant :
    - un mouvement de translation linéaire dans des sens opposés le long d'un axe vertical Y parallèle audit premier axe vertical B ;
    - un mouvement de translation linéaire dans des sens opposés le long d'un axe horizontal X perpendiculaire audit axe vertical Y ;
    - un mouvement de rotation angulaire dans des sens de rotation opposés autour d'un axe Z perpendiculaire au plan contenant lesdits axes horizontal X et vertical Y ; ladite machine comprenant un circuit de traduction pour convertir les données commandant une machine à meuler connue en nouvelles données utilisables par ladite machine (1), par traduction des systèmes de référence des deux machines, par lequel :
    - l'axe Z de la machine connue est converti en ledit axe vertical Y ;
    - l'axe X de la machine connue est converti en ledit axe horizontal X;
    - l'axe C de la machine connue est converti en ledit premier axe vertical B ;
    - l'axe B de la machine connue est converti en l'axe C.
EP03013283A 2002-06-14 2003-06-12 Machine à meuler à axe vertical Expired - Lifetime EP1371448B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2002TO000514A ITTO20020514A1 (it) 2002-06-14 2002-06-14 Macchina di rettifica ad asse verticale
ITTO20020514 2002-06-14

Publications (2)

Publication Number Publication Date
EP1371448A1 EP1371448A1 (fr) 2003-12-17
EP1371448B1 true EP1371448B1 (fr) 2009-03-11

Family

ID=11459409

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03013283A Expired - Lifetime EP1371448B1 (fr) 2002-06-14 2003-06-12 Machine à meuler à axe vertical

Country Status (5)

Country Link
EP (1) EP1371448B1 (fr)
AT (1) ATE424967T1 (fr)
DE (1) DE60326513D1 (fr)
ES (1) ES2322248T3 (fr)
IT (1) ITTO20020514A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008045842B4 (de) * 2008-09-05 2012-07-12 Emag Holding Gmbh Verfahren und Schleifmaschine zum Schleifen lang gestreckter Werkstücke
KR200448827Y1 (ko) * 2010-01-11 2010-05-26 최성용 목탄 표면 연마장치
DE102012025308B4 (de) 2012-12-22 2018-04-05 Emag Holding Gmbh Schleifmaschine mit Abrichtvorrichtung
CN113649867A (zh) * 2021-08-25 2021-11-16 天津市康浩鑫隆科技有限公司 一种用于工件侧面打磨的工业机器人
CN113798953A (zh) * 2021-08-27 2021-12-17 龙兵 一种塑料板生产用边缘打磨装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB544213A (en) * 1941-02-11 1942-04-01 Nat Broach & Mach Improvements in or relating to finish-cutting of metal surfaces

Also Published As

Publication number Publication date
ITTO20020514A1 (it) 2003-12-15
ITTO20020514A0 (it) 2002-06-14
ATE424967T1 (de) 2009-03-15
EP1371448A1 (fr) 2003-12-17
DE60326513D1 (de) 2009-04-23
ES2322248T3 (es) 2009-06-18

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