FR2821779A1 - High speed cylindrical grinding machine comprises part holding and rotating means, numerically controlled carriage carrying grindstone and means for holding and positioning cutting tool - Google Patents
High speed cylindrical grinding machine comprises part holding and rotating means, numerically controlled carriage carrying grindstone and means for holding and positioning cutting tool Download PDFInfo
- Publication number
- FR2821779A1 FR2821779A1 FR0103046A FR0103046A FR2821779A1 FR 2821779 A1 FR2821779 A1 FR 2821779A1 FR 0103046 A FR0103046 A FR 0103046A FR 0103046 A FR0103046 A FR 0103046A FR 2821779 A1 FR2821779 A1 FR 2821779A1
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- France
- Prior art keywords
- holding
- cutting tool
- carriage
- grinding wheel
- grinding machine
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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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q39/00—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation
- B23Q39/02—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station
- B23Q39/021—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station with a plurality of toolheads per workholder, whereby the toolhead is a main spindle, a multispindle, a revolver or the like
- B23Q39/022—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station with a plurality of toolheads per workholder, whereby the toolhead is a main spindle, a multispindle, a revolver or the like with same working direction of toolheads on same workholder
- B23Q39/024—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station with a plurality of toolheads per workholder, whereby the toolhead is a main spindle, a multispindle, a revolver or the like with same working direction of toolheads on same workholder consecutive working of toolheads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B3/00—General-purpose turning-machines or devices, e.g. centre lathes with feed rod and lead screw; Sets of turning-machines
- B23B3/16—Turret lathes for turning individually-chucked workpieces
- B23B3/161—Turret lathes for turning individually-chucked workpieces lathe with one toolslide carrying one turret head
- B23B3/162—Arrangements for performing other machining operations, e.g. milling, drilling
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q39/00—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation
- B23Q2039/008—Machines of the lathe type
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
Abstract
Description
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La présente invention concerne une machine à rectifier cylindrique, notamment à grande vitesse, du type dans lequel la pièce à rectifier est soumise à un mouvement de rotation par rapport à une meule d'usinage rotative notamment du type CBN (Nitrure de Bore Cubique). The present invention relates to a cylindrical grinding machine, in particular at high speed, of the type in which the workpiece to be grinded is subjected to a rotational movement with respect to a rotary machining wheel in particular of the CBN (Cubic Boron Nitride) type.
On sait que les machines à rectifier de type classique utilisent des meules"de forme"c'est-à-dire des meules dont le profil épouse le contour externe des pièces à rectifier, sur lesquelles elles sont appliquées. It is known that conventional type grinding machines use "shaped" grinding wheels, that is to say grinding wheels the profile of which conforms to the external contour of the workpieces to which they are applied.
La déposante a récemment développé des machines à rectifier à grande vitesse qui utilisent quant à elles des meules de faible largeur qui sont animées d'un mouvement de déplacement suivant deux axes orthogonaux par des moyens d'asservissement précis permettant à la meule de suivre rigoureusement les contours de la pièce. The applicant has recently developed high-speed grinding machines which use small grinding wheels which are moved in a movement along two orthogonal axes by precise servo means allowing the grinding wheel to follow the contours of the part.
Ces machines à rectifier permettent d'atteindre des vitesses périphériques de l'ordre de 120 m/s à 250 m/s qui sont très supérieures à celles atteintes avec les machines à rectifier conventionnelles (45 mis à 60 m/s). These grinding machines make it possible to reach peripheral speeds of the order of 120 m / s to 250 m / s which are much higher than those achieved with conventional grinding machines (45 set to 60 m / s).
On a constaté que de telles machines permettent de réduire les efforts de coupe sur les pièces, ce qui améliore à la fois les qualités géométriques et dimensionnelles de celles-ci ainsi que leur état de surface. It has been found that such machines make it possible to reduce the cutting forces on the parts, which improves both the geometric and dimensional qualities of these as well as their surface condition.
De telles machines permettent en outre de remplacer les meules de rectification de formes complexes utilisées jusqu'alors, par des meules de grande simplicité qui leur confèrent un caractère polyvalent. Such machines also make it possible to replace grinding wheels of complex shapes previously used, with very simple grinding wheels which give them a versatile character.
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Cependant, dans certains cas, les pièces à rectifier possèdent des formes que les meules de rectification ne peuvent reproduire. Tel est par exemple le cas de la réalisation de volumes dont la largeur est inférieure à celle de la meule. On est alors contraint de réaliser une reprise sur une autre machine au moyen d'un outil de coupe approprié. Cette opération supplémentaire complique la gamme d'usinage de la pièce et augmente ainsi le coût de fabrication de celle-ci. However, in some cases, the workpieces have shapes that the grinding wheels cannot reproduce. This is for example the case of producing volumes whose width is less than that of the grinding wheel. We are then forced to make a recovery on another machine using an appropriate cutting tool. This additional operation complicates the machining range of the part and thus increases the cost of manufacturing it.
La présente invention se propose de remédier à cet inconvénient en permettant aux machines à rectifier, notamment de type à grande vitesse, de réaliser elles mêmes, et de façon automatique, nombre des opérations qui nécessitaient jusqu'à présent une étape de reprise. Elle contribue ainsi à l'amélioration du caractère polyvalent de ce type de machines à rectifier. The present invention proposes to remedy this drawback by allowing the grinding machines, in particular of the high speed type, to carry out themselves, and automatically, many of the operations which hitherto required a recovery step. It thus contributes to improving the versatile nature of this type of grinding machine.
La présente invention a ainsi pour objet une machine a rectifier cylindrique, notamment de type à grande vitesse, comportant des moyens de maintien et d'entraînement en rotation de la pièce à rectifier, un chariot porteur d'une meule de rectification apte à se déplacer suivant au moins deux axes orthogonaux sous l'action de moyens de commande, notamment de type numérique, caractérisée en ce que le chariot porte meule comporte : - des moyens de maintien d'au moins un outil de coupe, The present invention thus relates to a cylindrical grinding machine, in particular of the high speed type, comprising means for holding and driving in rotation the workpiece to be ground, a carriage carrying a grinding wheel capable of moving along at least two orthogonal axes under the action of control means, in particular of digital type, characterized in that the grinding wheel carriage comprises: - means for holding at least one cutting tool,
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- des moyens de positionnement de l'outil de coupe par rapport à la pièce en vue d'un usinage de celle-ci, et - des moyens permettant, lors de cette opération, d'escamoter la meule de rectification par rapport à la pièce. - means for positioning the cutting tool relative to the workpiece for machining thereof, and - means making it possible, during this operation, to retract the grinding wheel relative to the workpiece .
Afin de rendre entièrement automatique l'opération d'usinage au moyen de l'outil de coupe, les moyens de positionnement de celui-ci par rapport à la pièce pourront être contrôlés par les moyens de commande du chariot porte meule. In order to make the machining operation fully automatic by means of the cutting tool, the means for positioning the latter relative to the workpiece can be controlled by the control means of the grinding wheel carriage.
Dans un mode de mise en oeuvre de l'invention les moyens de positionnement de l'outil de coupe par rapport à la pièce pourront être constitués d'un chariot secondaire monté à coulissement sur une glissière verticale du chariot porte meule. In one embodiment of the invention, the means for positioning the cutting tool with respect to the workpiece may consist of a secondary carriage slidably mounted on a vertical slide of the grinding wheel carriage.
Bien entendu on pourra faire appel à plusieurs types d'outils de coupe qui seront spécifiques des usinages à effectuer, qui se trouveront à poste sur le chariot porte meule et que les moyens de commande associés à celui-ci pourront successivement, ou simultanément, mettre en fonction d'usinage. Of course, we can use several types of cutting tools which will be specific to the machining to be carried out, which will be stationed on the grinding wheel carriage and which the control means associated with it may successively, or simultaneously, put depending on machining.
Les outils de coupe, associés à leurs moyens de maintien et de positionnement pourront former des modules, éventuellement interchangeables aptes à se fixer sur le chariot porte meule en fonction des travaux à effectuer. Chacun des modules pourra être pourvu de ses propres moyens de commande. The cutting tools, associated with their holding and positioning means may form modules, possibly interchangeable capable of being fixed on the grinding wheel carriage as a function of the work to be carried out. Each of the modules can be provided with its own control means.
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Par ailleurs, la filtration des copeaux résultant de l'usinage effectué par l'outil de coupe pourra être assurée par les moyens de filtration associés au chariot porte meule. Furthermore, the filtration of the chips resulting from the machining carried out by the cutting tool can be ensured by the filtration means associated with the grinding wheel carriage.
On décrira ci-après, à titre d'exemple non limitatif, des formes d'exécution de la présente invention, en référence au dessin annexé sur lequel :
La figure 1 est une vue de dessus schématique d'une machine à rectifier suivant l'invention. Embodiments of the present invention will be described below, by way of non-limiting example, with reference to the appended drawing in which:
Figure 1 is a schematic top view of a grinding machine according to the invention.
La figure 2 est une vue schématique à échelle agrandie d'un exemple d'usinage susceptible d'être mis en oeuvre sur une machine à rectifier suivant l'invention. Figure 2 is a schematic view on an enlarged scale of an example of machining capable of being implemented on a grinding machine according to the invention.
La figure 3 est une vue de dessus schématique partielle d'une variante de mise en oeuvre d'une machine à rectifier suivant l'invention. Figure 3 is a partial schematic top view of an alternative embodiment of a grinding machine according to the invention.
La figure 4 est une vue de face de la variante de mise en oeuvre représentée sur la figure 3. FIG. 4 is a front view of the variant embodiment shown in FIG. 3.
La machine à rectifier représentée sur les figures 1 à 4 est essentiellement constituée d'un bâti en granit 1 qui supporte une tête porte pièce 3 et une tête porte pointe 5 qui assurent le maintien et l'entraînement en rotation d'une pièce à rectifier 7 de forme cylindrique. The grinding machine shown in Figures 1 to 4 consists essentially of a granite frame 1 which supports a workpiece head 3 and a point head 5 which maintain and rotate the workpiece to be ground 7 of cylindrical shape.
De façon connue, la machine à rectifier comporte un chariot porte meule 9 qui assure le maintien et l'entraînement en rotation d'une meule 11, notamment une meule de type CBN. Le chariot porte meule 9 est apte à effectuer un déplacement X parallèlement à l'axe uu'de la pièce à rectifier 7 et un déplacement Y orthogonal au In known manner, the grinding machine comprises a grinding wheel carriage 9 which maintains and rotates a grinding wheel 11, in particular a grinding wheel of the CBN type. The grinding wheel carriage 9 is capable of carrying out a movement X parallel to the axis uu 'of the workpiece 7 and a movement Y orthogonal to the
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premier, sous l'action de moyens de commande numériques 13, notamment pilotés par des moyens logiciels. Ainsi, de façon conventionnelle, lorsque l'on effectue une rectification cylindrique, les moyens de commande 13 contrôlent le déplacement du chariot porte meule 9, de façon qu'au cours du déplacement de celui-ci la meule 11 suive le profil externe de la pièce 7 à rectifier. first, under the action of digital control means 13, in particular controlled by software means. Thus, conventionally, when a cylindrical grinding is carried out, the control means 13 control the movement of the grinding wheel carriage 9, so that during the movement thereof the grinding wheel 11 follows the external profile of the part 7 to be corrected.
Suivant l'invention, le chariot porte meule 9 est pourvu d'un chariot secondaire 15 qui est apte à effectuer un déplacement Z, orthogonal aux déplacements X et Y, par coulissement sur une glissière verticale 16. Le chariot secondaire 15 est pourvu d'un porte outils 17 sur lequel est fixé un outil 19 du type de ceux utilisés en tournage. Le déplacement du chariot secondaire 15 suivant l'axe Z est également contrôlé par les moyens de commande 13. According to the invention, the grinding wheel carriage 9 is provided with a secondary carriage 15 which is capable of carrying out a movement Z, orthogonal to the movements X and Y, by sliding on a vertical slide 16. The secondary carriage 15 is provided with a tool holder 17 on which is fixed a tool 19 of the type used in turning. The movement of the secondary carriage 15 along the Z axis is also controlled by the control means 13.
Dans ces conditions, avant ou après l'opération de rectification, les moyens de commande 13 amèneront l'outil 19 au niveau de l'axe uu'de la pièce à rectifier 7, en déplaçant du haut vers le bas le chariot secondaire 15 sur la glissière 16, de façon que l'outil 19 puisse entrer en contact avec la pièce 7 et que la meule 11 se trouve alors dégagée. Under these conditions, before or after the rectification operation, the control means 13 will bring the tool 19 to the level of the axis uu ′ of the part to be rectified 7, by moving the secondary carriage 15 from top to bottom. the slide 16, so that the tool 19 can come into contact with the part 7 and the grinding wheel 11 is then released.
Dans l'exemple représenté sur la figure 2 on souhaite réaliser, au moyen de l'outil 19, d'une part une portée 21 sur la pièce 7 et d'autre part un volume de dépouille 22. Dans un premier temps, les moyens de commande 13 déplaceront le chariot porte meule 9 suivant In the example shown in FIG. 2, it is desired to produce, by means of the tool 19, on the one hand a bearing surface 21 on the part 7 and on the other hand a clearance volume 22. Firstly, the means 13 will move the grinding wheel carriage 9 next
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l'axe Y pour réaliser la portée 21, puis, dans un second pour re temps, ils le déplaceront suivant l'axe X pour réaliser le volume de dépouille 22. Une fois l'opération d'usinage terminée les moyens de commande 13 ramèneront le chariot 15 à sa position de départ.
the Y axis to achieve the scope 21, then, in a second for re time, they will move it along the X axis to achieve the clearance volume 22. Once the machining operation is completed the control means 13 will bring the carriage 15 in its starting position.
Le chariot porte meule peut être pourvu de plusieurs chariots secondaires équipés d'outils spécifiques, qui pourront être mis en oeuvre de façon successive ou simultanée. The grinding wheel trolley can be provided with several secondary trolleys equipped with specific tools, which can be implemented successively or simultaneously.
Dans l'exemple de mise en oeuvre représenté sur les figures 3 et 4 le chariot porte meule 9 est ainsi pourvu de deux glissières verticales 16 et 16'sur lesquelles sont montés à coulissement deux chariots secondaires 15, 15'pourvus d'outils 19, 19'. Pendant l'opération de rectification les chariots secondaires 15, 15'sont en position haute (figure 4), si bien que leurs outils
respectifs 19, 19'se trouvent hors de portée de la pièce 7. Ensuite, les moyens de commande 13 mettent le ou les outils 19, 19'en position d'usinage, commandent la mise en oeuvre de cette dernière opération, puis ramènent les outils en position de repos. In the example of implementation shown in FIGS. 3 and 4, the grinding wheel carriage 9 is thus provided with two vertical slides 16 and 16 ′ on which two secondary carriages 15, 15 ′ are slidably mounted, fitted with tools 19, 19. During the rectification operation, the secondary carriages 15, 15 'are in the high position (Figure 4), so that their tools
19, 19 ′ are out of reach of the part 7. Then, the control means 13 put the tool or tools 19, 19 ′ in the machining position, control the implementation of this last operation, then bring the tools in rest position.
On peut bien entendu, suivant l'invention, équiper les machines à rectifier de moyens de positionnement divers supportant tout type d'outils de coupe appropriés à l'usinage à effectuer sur la pièce 7. It is of course possible, according to the invention, to equip the grinding machines with various positioning means supporting any type of cutting tools suitable for the machining to be carried out on the part 7.
Dans un mode de mise en oeuvre de l'invention, les moyens de maintien et de fonctionnement d'un outil 19 constituent un module apte à se fixer sur le chariot In one embodiment of the invention, the means for holding and operating a tool 19 constitute a module capable of being fixed on the carriage
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porte meule éventuellement de façon interchangeable. La commande des éléments de chaque module peut être assurée par les moyens de commande 13 du chariot porte meule 9 ou par des moyens indépendants. grinding wheel holder possibly interchangeably. The control of the elements of each module can be ensured by the control means 13 of the grinding wheel carriage 9 or by independent means.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0103046A FR2821779A1 (en) | 2001-03-06 | 2001-03-06 | High speed cylindrical grinding machine comprises part holding and rotating means, numerically controlled carriage carrying grindstone and means for holding and positioning cutting tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0103046A FR2821779A1 (en) | 2001-03-06 | 2001-03-06 | High speed cylindrical grinding machine comprises part holding and rotating means, numerically controlled carriage carrying grindstone and means for holding and positioning cutting tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2821779A1 true FR2821779A1 (en) | 2002-09-13 |
Family
ID=8860801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR0103046A Pending FR2821779A1 (en) | 2001-03-06 | 2001-03-06 | High speed cylindrical grinding machine comprises part holding and rotating means, numerically controlled carriage carrying grindstone and means for holding and positioning cutting tool |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2821779A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102441793A (en) * | 2011-11-07 | 2012-05-09 | 宁波威玛斯车业有限公司 | Process for manufacturing central axis of bicycle hub |
| CN114473603A (en) * | 2022-02-16 | 2022-05-13 | 烟台汽车工程职业学院 | Feed control device of numerical control machine tool |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04372302A (en) * | 1991-06-20 | 1992-12-25 | Kiwa Giken Kk | Spindle for complex machine tool |
| DE19546863A1 (en) * | 1994-12-21 | 1996-06-27 | Komet Stahlhalter Werkzeug | Finish-machining equipment for hardened work |
| DE19902137C1 (en) * | 1999-01-20 | 2000-06-29 | Ilg Gmbh | Machine tool for grinding workpieces has grinder and workpiece holder movable on machine tool stand in different directions parallel to vertical wall to engage workpiece and grinder |
-
2001
- 2001-03-06 FR FR0103046A patent/FR2821779A1/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04372302A (en) * | 1991-06-20 | 1992-12-25 | Kiwa Giken Kk | Spindle for complex machine tool |
| DE19546863A1 (en) * | 1994-12-21 | 1996-06-27 | Komet Stahlhalter Werkzeug | Finish-machining equipment for hardened work |
| DE19902137C1 (en) * | 1999-01-20 | 2000-06-29 | Ilg Gmbh | Machine tool for grinding workpieces has grinder and workpiece holder movable on machine tool stand in different directions parallel to vertical wall to engage workpiece and grinder |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 017, no. 256 (M - 1413) 20 May 1993 (1993-05-20) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102441793A (en) * | 2011-11-07 | 2012-05-09 | 宁波威玛斯车业有限公司 | Process for manufacturing central axis of bicycle hub |
| CN114473603A (en) * | 2022-02-16 | 2022-05-13 | 烟台汽车工程职业学院 | Feed control device of numerical control machine tool |
| CN114473603B (en) * | 2022-02-16 | 2023-01-17 | 烟台汽车工程职业学院 | Feed control device of numerical control machine tool |
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