FR2519282A1 - Grinder for stepped shafts - uses plate shaped grinder with conical rim providing right angled edge with axial face - Google Patents
Grinder for stepped shafts - uses plate shaped grinder with conical rim providing right angled edge with axial face Download PDFInfo
- Publication number
- FR2519282A1 FR2519282A1 FR8124665A FR8124665A FR2519282A1 FR 2519282 A1 FR2519282 A1 FR 2519282A1 FR 8124665 A FR8124665 A FR 8124665A FR 8124665 A FR8124665 A FR 8124665A FR 2519282 A1 FR2519282 A1 FR 2519282A1
- Authority
- FR
- France
- Prior art keywords
- grinding wheel
- axis
- machining
- grinder
- parallel
- 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.)
- Granted
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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
- 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
- B24B5/042—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 for grinding several workpieces at once using one grinding wheel
-
- 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
- B24B5/01—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor for combined grinding of surfaces of revolution and of adjacent plane surfaces on work
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
Abstract
Description
La présente invention est relative à un procédé nouveau et à une rectifieuse d'un type egalement nouveau , pour usiner deux pièces à la fois,
On connaît des rectifieuses utilisant une meule plate à périphérie cylindrique de révolution ,pour usiner sur une pièce un contour également cylindrique de révolution . Pour cela , on dispose parallèlement entre eux , les iceux axes , celui de la meule et celui de la pièce .Périodiquement , pour compenser l'usure de la meule après un certain nombre de pièces , il est nécessaire de diamanter la face cylindrique périphérique de la meule afin de lui faire retrouver des génératrices parfaitement rectilignes
Par contre , lorsqu'on désire usiner sur la pièce à la fois un tourillon cylindrique et une face d'appui annulaire transversale , on pourrait continuer à utiliser une meule cylindrique du type précité , dont l'axe est parallèle à celui de la pièce.The present invention relates to a new process and to a grinding machine of an equally new type, for machining two parts at the same time,
Grinders are known using a flat grinding wheel with a cylindrical periphery of revolution, for machining a part that is also cylindrical of revolution. For this, there are in parallel between them, the iceux axes, that of the grinding wheel and that of the workpiece. Periodically, to compensate for the wear of the grinding wheel after a certain number of parts, it is necessary to diamond the peripheral cylindrical face of the grinding wheel to make it find perfectly straight generators
On the other hand, when it is desired to machine on the part both a cylindrical journal and a transverse annular bearing face, one could continue to use a cylindrical wheel of the aforementioned type, the axis of which is parallel to that of the part.
bans ce cas , l'usure de la meule prendrait place à la fois sur sa périphérie cylindrique et sur une zone annulaire périphérique d'une de ses faces transversales planes; L'inconvénient de cette disposition rfisulte du fait que , pour diamanter la meule après un certain nombre d'usinages, , il est nécessaire de lui enlever sur toute son épaisseur , la matière correspondant à la largeur de la zone périphérique annulaire 9 L'affttage de la meule serait donc une opération exagérément coûteuse
Pour éviter cet inconvénient , il est connu d'utiliser une meule-disque , dont la section méridienne périphérique a la forme d'un dièdre rectangle saillant , tandis que par ailleurs , sur la rectifieuse , on adopte pour l'axe de rotation de la meule , une inclinaison calculée par rapport à celle de l'axe i la pièce , de façon que dans la zone de contact avec celle-ci , la meule ait une arête de son dièdre rectangle de section parallèle à l'axe de la pièce , l'autre lui étant perpendiculaire , pour usiner ltépaulement. in this case, the wear of the grinding wheel would take place both on its cylindrical periphery and on an annular peripheral zone of one of its planar transverse faces; The disadvantage of this arrangement is that, to diamond the grinding wheel after a certain number of machining operations, it is necessary to remove over its entire thickness, the material corresponding to the width of the annular peripheral zone. of the grinding wheel would therefore be an excessively expensive operation
To avoid this drawback, it is known to use a disc wheel, the peripheral meridian section of which has the shape of a protruding right-angled dihedron, while moreover, on the grinding machine, the axis of rotation of the grinding wheel, an inclination calculated with respect to that of the axis i the part, so that in the zone of contact with the latter, the grinding wheel has an edge of its right dihedral rectangle of section parallel to the axis of the part, the other being perpendicular to it, to machine the shoulder.
Bans ces conditions , pendant l'usinage , on anime l'axe de la meule d'un mouvement de plongée oblique par rapport à la pièce . Après un certain nombre d'usinage ,il suffit de diamanter les deux faces tronconiques définies sur la meule par la section méridienne précitée ce diamantagesSectue en enlevant un minimum de matière0
Cette disposition est bien connue pour usiner une pièce à la fois,
La présente invention vise à augmenter la productivitd de la machine rectifieuse , en proposant un dispositif et un procédé de type nouveau , permettant d'usiner dt-xpièces à la fois
En effet , le procédé connu qui vient d'être rappelé permet d'usiner à la fois un tourillon cylindrique et un épaulement transversal plan , sur une pièce en utilisant une meule biconique à plongée oblique , à la condition que l'axe de rotation de la meule et celui de la pièce soient tous deux coplanaires . Par contre , si l'on plaçait de la même façon deux pièces cSte à côte , leurs deux axes étant parallèles entre eux , alors qu'une meule biconique à axe incliné travaillerait avec un mouvement de plongée oblique , la géométrie descriptive montre que les usinages ainsi effectués sur les pièces seraient des surfaces gauches différentes du plan transversal et du cylindre de révolution recherchés.In these conditions, during machining, the axis of the grinding wheel is animated with an oblique plunge movement relative to the part. After a certain number of machining operations, it suffices to diamond the two frusto-conical faces defined on the grinding wheel by the aforementioned meridian section, this diamenes follows by removing a minimum of material.
This arrangement is well known for machining one part at a time,
The present invention aims to increase the productivity of the grinding machine, by proposing a device and a method of new type, making it possible to machine dt-xpièces at the same time
Indeed, the known method which has just been recalled makes it possible to machine both a cylindrical journal and a flat transverse shoulder, on a workpiece using a bi-conical grinding wheel with oblique plunge, provided that the axis of rotation of the grinding wheel and that of the workpiece are both coplanar. On the other hand, if two cSte parts were placed in the same way side by side, their two axes being parallel to each other, while a biconical wheel with an inclined axis would work with an oblique plunge movement, the descriptive geometry shows that the machining thus carried out on the parts would be left surfaces different from the transverse plane and from the cylinder of revolution sought.
Pour éviter cet inconvénient , une machine selon l'invention comprend une meule d'usinage unique , entraînée en rotation , caractérisée en ce qu'elle a la forme d'une assiette , c'est-à-dire que son fond central de fixation est en creux , par rapport à sa périphérie d'usinage , laquelle comporte deux faces d'usinage à savoir - une première face transversale annulaire dont le plan est perpen
diculaire à celui de l'axe de rotation de la meule - une seconde face périphérique cylindrique de révolution , axée
sur l'axe géométrique de la meule,
Le procédé selon l'invention pour usiner un tourillon cylindrique et un épaulement transversal plan sur deux pièces à la fois , est caractérisé en ce qu'on monte les deux pièces c8te à côte sur une rectifieuse , leurs deux axes de rotation étant parallèles entre eux , tandis que l'usinage est assuré par une meule assiette selon l'invention , dont l'axe de rotation est parallèle à celui des deux pièces , tandis quten cours d'usinage , il est animé d'un mouvement de plongée oblique
Dans ces conditions , on voit que l'invention permet d'obtenir à la fois - un usinage géométriquement rigoureux des deux pièces - une usure répartie de la meule , dont la largeur utileleste cons
tante sur chacune des deux faces d'usinage , que la meule soit
neuve cu usée,
Le dessin annexé , donné à titre d'exemple non limitatif , permettra de mieux comprendre les caracteristiques de l'invention.To avoid this drawback, a machine according to the invention comprises a single machining wheel, driven in rotation, characterized in that it has the shape of a plate, that is to say that its central fixing base is hollow, relative to its machining periphery, which has two machining faces, namely - a first annular transverse face whose plane is perpen
dicular to that of the axis of rotation of the grinding wheel - a second cylindrical peripheral face of revolution, focused
on the geometric axis of the grinding wheel,
The method according to the invention for machining a cylindrical journal and a flat transverse shoulder on two parts at the same time, is characterized in that the two parts are mounted side by side on a grinding machine, their two axes of rotation being parallel to each other , while the machining is ensured by a plate wheel according to the invention, the axis of rotation of which is parallel to that of the two parts, while during machining, it is driven by an oblique plunge movement
Under these conditions, it can be seen that the invention makes it possible to obtain both - geometrically rigorous machining of the two parts - distributed wear of the grinding wheel, the useful width of which cons
aunt on each of the two machining faces, whether the grinding wheel is
new or used,
The appended drawing, given by way of nonlimiting example, will allow a better understanding of the characteristics of the invention.
Figure 1 est une vue de face illustrant l'arrière d'une meule en train d'usiner simultanement deux pièces, conformé- ment au procédé selon l'invention
Figure 2 est une coupe suivant II-II (figure 1)
Figure 3 est une vue en perspective d'une meule selon l'invention
Figure 4 en est une vue en coupe axiale
Figure 5 est une vue en coupe analogue à la figure 2 montrant l'ensemble de la machine pendant les opérations d' usinage
On a représenté sur les dessins une meule qui, selon l'invention, a une forme dite n en assiette ".Autrement dit, autour de son moyeu central 2, la meule 1 comporte un fond piat 3 entouré par un rebords 4 dont les faces 5 et 6 sont tronconiques.La face 5 se raccorde à une face annulaire 7 dont le plan est perpendiculaire à l'axe de révolution8 de la meule.La face tronconique 6 se raccorde à une face péri phérique cylindrique 9. Bien entendu, l'ensemble est de révolution autour de l'axe 8.Figure 1 is a front view illustrating the rear of a grinding wheel simultaneously machining two parts, according to the method according to the invention
Figure 2 is a section along II-II (Figure 1)
Figure 3 is a perspective view of a grinding wheel according to the invention
Figure 4 is an axial sectional view
Figure 5 is a sectional view similar to Figure 2 showing the entire machine during machining operations
There is shown in the drawings a grinding wheel which, according to the invention, has a so-called n-shaped plate ". In other words, around its central hub 2, the grinding wheel 1 has a bottom piat 3 surrounded by a flanges 4 whose faces 5 and 6 are frustoconical. The face 5 is connected to an annular face 7 whose plane is perpendicular to the axis of revolution8 of the grinding wheel. The frustoconical face 6 is connected to a cylindrical peripheral face 9. Of course, the together is of revolution around axis 8.
Les faces 7 et 9 correspondent à une section méridienne sensiblement à angle droit, comme cela apparat sur la figure 4 . Elles définissent au niveau de leur raccordement, une arête circulaire 10. The faces 7 and 9 correspond to a meridian section substantially at right angles, as shown in FIG. 4. They define at their connection, a circular edge 10.
Selon l'invention, on utilise la meule-assiette 1 pour usiner simultanément deux pièces 11 et 12. Chacune des deux pièces 11 et 12 est montée à la manière habituelle, comme repré- senté sur la figure 5. Autrement dit, chaque pièce est montée entre un mandrin 13 avec toc d'entratnement et une contrepointe 14. L'ensemble fait tourner la pièce autour d'un axe qui est référencé 15 pour la pièce 11, et 16 pour la pièce 12. According to the invention, the plate wheel 1 is used to machine two parts 11 and 12 simultaneously. Each of the two parts 11 and 12 is mounted in the usual manner, as shown in FIG. 5. In other words, each part is mounted between a mandrel 13 with drive collar and a tailstock 14. The assembly rotates the part around an axis which is referenced 15 for part 11, and 16 for part 12.
Suivant une caractéristique de l'invention, les trois axes 8,15 et 16 sont tous parallèles à une mame direction. According to a characteristic of the invention, the three axes 8, 15 and 16 are all parallel to a same direction.
Par ailleurs, l'axe 8 de la meule 1 est porté par un chariot porte-ioule 17 qui coulisse comme indiqué par la flèche
rouble 19, sur deux glissières 18 dont la direction est ori entée obliquement par rapport à celle des axes 8 > 15et 16. Furthermore, the axis 8 of the grinding wheel 1 is carried by an ioule-carrying carriage 17 which slides as indicated by the arrow
ruble 19, on two slides 18, the direction of which is oriented obliquely to that of axes 8> 15 and 16.
L'ensemble constitue un porte-meule à plongés oblique.The assembly constitutes an oblique plunge grinding wheel holder.
Par ailleurs, le chariot 17 porte à la manière habituelle un appareil à diamenter 20 comportant une 10 lette de diamantage profilée 21. Cette molette 21 tourne sur la pé riphflérie de la meule 1 pour rafraîchir son profil de taille, en fonction de l'usure. L'axe de plongée 22 de l'appareil à diamanter 20 est orienté obliquement par rapport à l'axe 8 que porte le chariot 17. Furthermore, the carriage 17 carries in the usual way a gear 20 having a profiled diamond wheel 21. This wheel 21 rotates on the periphery of the wheel 1 to refresh its size profile, depending on wear . The plunging axis 22 of the diamond-cutting device 20 is oriented obliquely with respect to the axis 8 carried by the carriage 17.
Le fonctionnement est le suivant:
On se propose usiner simultanément deux pièces 11 et 12 dont chacune comporte, d'une part une partie cylindrique 23, d'antre part un épaulement transversal plan 24. Dans ltexem- ple illustré, on suppose que le raccordement entre le cylindre 23 et ltépaulement 24 se fait sans congé.Dans ce cas, l'ar8te circulaire 10 de la meule 1 reste à angle tif . Bien entendu, il suffirait d'arrondir cette arête 10 suivant un petit rayon, pour définir un congé au raccordement entre le cylindre 23 et l'épaulement 24.The operation is as follows:
It is proposed to machine two parts 11 and 12 simultaneously, each of which comprises, on the one hand a cylindrical part 23, on the other hand a plane transverse shoulder 24. In the example illustrated, it is assumed that the connection between the cylinder 23 and the shoulder 24 is done without leave. In this case, the circular edge 10 of the grinding wheel 1 remains at a sharp angle. Of course, it would suffice to round this edge 10 along a small radius, to define a fillet at the connection between the cylinder 23 and the shoulder 24.
Comme illustré sur les figure 1 et 5, les pièces sont montées de façon que leurs deux axes 15et 16 arbërrt paralléles entre eux , et parallèles à l'axe 8 autour duquel tourne la meule 1. La meule 1 est animée d'un mouvement de plongée oblique, parallèle à la direction de la flèche double 19. Dans ces conditions, la meule 1 usine simultanément par ses deus faces 7 et 9, qui rectifient, la première l'epaulement transversal plat 24, la seconde la portée cylindrique 23. As illustrated in FIGS. 1 and 5, the parts are mounted so that their two axes 15 and 16 arbërrt parallel to each other, and parallel to the axis 8 around which the grinding wheel 1 rotates. The grinding wheel 1 is driven by a movement of oblique plunge, parallel to the direction of the double arrow 19. Under these conditions, the grinding wheel 1 works simultaneously by its two faces 7 and 9, which first rectify the flat transverse shoulder 24, the second the cylindrical bearing 23.
Du fait de la forme en assiette de la meule 1, on voit que pour la diamanter après une certaine durée de servica, c'est-à-dire pour rafraîchir la forme géométrique des faces de travail 7 et 9i la quantité de matière à éliminer sur la meule 1 par diamantage reste pratiquement constante tout au long de la vie de la meule. En effet, le mouvement de plongée de la molette de diamantage 21 s'effectuant suivant la direction oblique de l'axe 22 (figure 4), laquelle correspond sensiblement à la direction des génératrices définissant les deux faces tronconiques 5 et 6, on voit que l'épaisseur 25 dukbord périphérique de la meule assiette 1 reste sensiblement constante. Due to the plate shape of the grinding wheel 1, it can be seen that to diamond it after a certain period of servica, that is to say to refresh the geometric shape of the working faces 7 and 9i, the quantity of material to be removed. on the grinding wheel 1 by diamond dressing remains practically constant throughout the life of the grinding wheel. Indeed, the plunging movement of the diamond wheel 21 taking place in the oblique direction of the axis 22 (FIG. 4), which corresponds substantially to the direction of the generatrices defining the two frustoconical faces 5 and 6, it can be seen that the peripheral dukbord thickness 25 of the plate grinding wheel 1 remains substantially constant.
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8124665A FR2519282B1 (en) | 1981-12-31 | 1981-12-31 | MACHINE FOR SIMULTANEOUSLY GRINDING TWO PIECES, COMPRISING AT LEAST ONE CYLINDRICAL RANGE AND A CROSS-SHOULDER |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8124665A FR2519282B1 (en) | 1981-12-31 | 1981-12-31 | MACHINE FOR SIMULTANEOUSLY GRINDING TWO PIECES, COMPRISING AT LEAST ONE CYLINDRICAL RANGE AND A CROSS-SHOULDER |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2519282A1 true FR2519282A1 (en) | 1983-07-08 |
FR2519282B1 FR2519282B1 (en) | 1986-06-20 |
Family
ID=9265637
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8124665A Expired FR2519282B1 (en) | 1981-12-31 | 1981-12-31 | MACHINE FOR SIMULTANEOUSLY GRINDING TWO PIECES, COMPRISING AT LEAST ONE CYLINDRICAL RANGE AND A CROSS-SHOULDER |
Country Status (1)
Country | Link |
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FR (1) | FR2519282B1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0169971A1 (en) * | 1984-07-17 | 1986-02-05 | Luciano Barbisan | Universal grinding machine for mass production |
EP0170764A1 (en) * | 1984-07-17 | 1986-02-12 | Luciano Barbisan | Grinding machine for crankshafts of diesel or internal-combustion engines |
FR2725394A1 (en) * | 1994-10-06 | 1996-04-12 | Taille De Pierre Andre Soc | Machine tool for shaping of workpieces to predetermined profile |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1527703A (en) * | 1965-05-20 | 1968-06-07 | E C S Engineering Const Switze | Device for machining rotating parts by means of a rotating tool, for example cylindrical surface grinding machines or grinding machines |
FR2047919A1 (en) * | 1969-06-25 | 1971-03-19 | Heald Machine Co | |
US3636664A (en) * | 1969-12-24 | 1972-01-25 | Landis Tool Co | Grinding wheel advancing apparatus |
US4170851A (en) * | 1977-09-20 | 1979-10-16 | Cincinnati Milacron Heald Corp. | Grinding machine |
FR2447778A1 (en) * | 1979-01-30 | 1980-08-29 | Toyoda Machine Works Ltd | GRINDING MACHINE WITH DIMENSIONAL CONTROL DEVICE |
-
1981
- 1981-12-31 FR FR8124665A patent/FR2519282B1/en not_active Expired
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1527703A (en) * | 1965-05-20 | 1968-06-07 | E C S Engineering Const Switze | Device for machining rotating parts by means of a rotating tool, for example cylindrical surface grinding machines or grinding machines |
FR2047919A1 (en) * | 1969-06-25 | 1971-03-19 | Heald Machine Co | |
US3636664A (en) * | 1969-12-24 | 1972-01-25 | Landis Tool Co | Grinding wheel advancing apparatus |
US4170851A (en) * | 1977-09-20 | 1979-10-16 | Cincinnati Milacron Heald Corp. | Grinding machine |
FR2447778A1 (en) * | 1979-01-30 | 1980-08-29 | Toyoda Machine Works Ltd | GRINDING MACHINE WITH DIMENSIONAL CONTROL DEVICE |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0169971A1 (en) * | 1984-07-17 | 1986-02-05 | Luciano Barbisan | Universal grinding machine for mass production |
EP0170764A1 (en) * | 1984-07-17 | 1986-02-12 | Luciano Barbisan | Grinding machine for crankshafts of diesel or internal-combustion engines |
FR2725394A1 (en) * | 1994-10-06 | 1996-04-12 | Taille De Pierre Andre Soc | Machine tool for shaping of workpieces to predetermined profile |
Also Published As
Publication number | Publication date |
---|---|
FR2519282B1 (en) | 1986-06-20 |
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