FR2500776A1 - Electric motor powered spindle with forced air cooling - uses an auxiliary asynchronous motor to drive fan forcing air through duct onto stator fins of the main motor - Google Patents
Electric motor powered spindle with forced air cooling - uses an auxiliary asynchronous motor to drive fan forcing air through duct onto stator fins of the main motor Download PDFInfo
- Publication number
- FR2500776A1 FR2500776A1 FR8104094A FR8104094A FR2500776A1 FR 2500776 A1 FR2500776 A1 FR 2500776A1 FR 8104094 A FR8104094 A FR 8104094A FR 8104094 A FR8104094 A FR 8104094A FR 2500776 A1 FR2500776 A1 FR 2500776A1
- Authority
- FR
- France
- Prior art keywords
- motor
- fan
- spindle
- electro
- electric motor
- 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
Links
- 238000001816 cooling Methods 0.000 title claims description 18
- 230000001360 synchronised effect Effects 0.000 claims abstract description 7
- 238000003801 milling Methods 0.000 claims abstract description 4
- 238000003754 machining Methods 0.000 claims description 7
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 241000555745 Sciuridae Species 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/12—Arrangements for cooling or lubricating parts of the machine
- B23Q11/126—Arrangements for cooling or lubricating parts of the machine for cooling only
- B23Q11/127—Arrangements for cooling or lubricating parts of the machine for cooling only for cooling motors or spindles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
Description
Electro-broche d'usinage. Electro-machining spindle.
L'invention concerne les électro-broches d'usinage, c'est-à-dire les ensembles constitués par un moteur électrique dont l'arbre du rotor est conçu et agencé pour constituer une broche rotative de réception directe d'un outil d'usinage, tel qu'une fraise ou un foret, par exemple, l'ensemble étant équipé d'un système de refroidissement. The invention relates to machining electro-spindles, that is to say assemblies constituted by an electric motor, the rotor shaft of which is designed and arranged to constitute a rotary spindle for direct reception of a tool. machining, such as a milling cutter or a drill, for example, the assembly being equipped with a cooling system.
Dans les ensembles connus de ce genre, le moteur électrique est du type asynchrone à rotor bobiné; le rotor subit donc un échauffement important par effet Joule et la chaleur qui s'en dégage se propage dans toutes les parties de l'ensemble. In known assemblies of this kind, the electric motor is of the asynchronous type with a wound rotor; the rotor therefore undergoes significant heating by the Joule effect and the heat which is released is propagated in all parts of the assembly.
Il est évidemment indispensable de limiter la température des différents organes de l'ensemble pour qu'il puisse fonctionner dans de bonnes conditions et que la précision des usinages exécutés avec les outils montés dans la broche ne soit pas perturbée par des effets de dilatation excessifs. On est donc conduit à équiper les ensembles de ce genre d'un système de refroidissement efficace.It is obviously essential to limit the temperature of the various members of the assembly so that it can operate in good conditions and that the precision of the machining operations carried out with the tools mounted in the spindle is not disturbed by excessive expansion effects. We are therefore led to equip assemblies of this kind with an effective cooling system.
A cet effet, deux solutions sont couramment utilisées. To this end, two solutions are commonly used.
Un premier procédé consiste à réaliser, au sein même de l'ensemble, des circuits de circulation d'huile destinée à extraire les calories à l'endroit où elles sont produites pour les évacuer à l'extérieur de l'ensemble; une telle solution est efficace, mais elle est relativement coûteuse à réaliser et nécessite une installation de refroidissement de l'huile avant sa réintroduction dans l'ensemble mécanique.Un deuxième procédé consiste à refroidir l'ensemble en soufflant de l'air sur sa surface extérieure munie d'ailettes en vue d'augmenter la surface des échanges calorifiques, mais ce procédé ne donne pas entière satisfaction; on lui reproche, en effet, de manquer d'efficacité parce qu'il n'est pas très rationnel de prélever les calories sur la périphérie de l'ensemble, alors qu'elles sont produites, au contraire, dans la partie tout à fait centrale de l'ensemble, à savoir : au sein même du rotor du moteur électrique. Enfin, lorsque la turbine de ventilation est fixée sur l'arbre du moteur de l'électro-broche, elle tourne donc à la même vitesse que cet arbre, ce qui donne lieu à un niveau sonore très élevé. A first method consists in producing, within the assembly itself, oil circulation circuits intended to extract the calories at the place where they are produced in order to evacuate them outside the assembly; such a solution is effective, but it is relatively expensive to produce and requires an oil cooling installation before its reintroduction into the mechanical assembly. A second method consists in cooling the assembly by blowing air on its surface outer fitted with fins in order to increase the area of heat exchange, but this process is not entirely satisfactory; it is criticized, in fact, for lacking efficiency because it is not very rational to take calories from the periphery of the whole, while they are produced, on the contrary, in the part entirely central unit, namely: within the rotor of the electric motor. Finally, when the ventilation turbine is fixed on the motor shaft of the electro-spindle, it therefore rotates at the same speed as this shaft, which gives rise to a very high noise level.
Le but de l'invention est de réaliser une électrobroche qui ne présente pas les inconvénients précités des électro-broches connues. The object of the invention is to produce an electrospindle which does not have the aforementioned drawbacks of known electro-spindles.
A cet effet, suivant l'invention, le moteur électrique est du type synchrone à rotor à aimants permanents et le système de refroidissement est du type à circulation forcée d'air, soit par soufflage d'air, soit par aspiration d'air. To this end, according to the invention, the electric motor is of the synchronous type with permanent magnet rotor and the cooling system is of the type with forced air circulation, either by blowing air or by air suction.
Grâce à cette conception particulière, le dégagement de chaleur est considérablement moindre que dans les électro-broches classiques à moteur électrique asynchrone à rotor bobiné, puisque le rotor est équipé d'aimants permanents. L'échauffement du rotor à vide est moindre, mais c'est surtout en charge que la différence est importante parce que le glissement entre la vitesse de rotation du champ tournant inducteur et-la vitesse réelle de rotation de l'arbre du moteur est nulle et que, par conséquent, les pertes dans le fer du rotor sont nulles également. Thanks to this particular design, the heat generation is considerably less than in conventional electro-spindles with asynchronous electric motor with wound rotor, since the rotor is equipped with permanent magnets. The heating of the no-load rotor is less, but it is especially under load that the difference is important because the slip between the speed of rotation of the inductive rotating field and the actual speed of rotation of the motor shaft is zero and that, consequently, the losses in the iron of the rotor are also zero.
Il en résulte qu'un système de refroidissement par circulation forcée d'air, autrefois d'une efficacité insuffisante, pour des électro-broches à moteur asynchrone, est capable de fournir des résultats tout à fait satisfaisants avec une électro-broche à moteur synchrone à rotor à aimants permanents. As a result, a system of forced air circulation cooling, formerly of insufficient efficiency, for electro-spindles with asynchronous motor, is capable of producing completely satisfactory results with an electro-spindle with synchronous motor. with permanent magnet rotor.
La nouvelle solution suivant l'invention présente encore d'autres avantages. En effet, elle procure une amélioration du cosinus "phi" permettant de moins surdimensionner le convertisseur, surtout dans le cas d'une alimentation en parallèle, et de réduire les pertes dans le stator du moteur. Elle assure une vitesse de rotation de la broche d'usinage rigoureusement stable, indépendamment des variations de la puissance qu'elle est appelée à fournir. Elle permet de simplifier considérablement, en particulier, le montage des roulements arrière, par rapport à celui nécessité par l'utilisation d'un système de refroidissement par huile, et de réduire le bruit d'environ lOdb par la suppression du groupe de refroidissement par huile.De plus, étant donné qu'un moteur synchrone à rotor à aimants permanents est réversible, en cas d'arrêt de sécurité il travaille en génératrice et assure un freinage sans qu'on ait besoin de l'alimenter en courant électrique. The new solution according to the invention has still other advantages. In fact, it provides an improvement in the cosine "phi" making it possible to oversize the converter less, especially in the case of a parallel supply, and to reduce losses in the stator of the motor. It ensures a rigorously stable spindle speed, regardless of variations in the power it is called upon to supply. It makes it possible to considerably simplify, in particular, the mounting of the rear bearings, compared to that required by the use of an oil cooling system, and to reduce noise by around 10 dB by eliminating the cooling group by In addition, given that a synchronous motor with permanent magnet rotor is reversible, in the event of a safety stop it works as a generator and ensures braking without the need to supply it with electric current.
L'invention sera mieux comprise à la lecture de la description qui va suivre et à l'examen des dessins annexés qui montrent, à titre d'exemple, un mode de réalisation de l'invention. The invention will be better understood on reading the description which follows and on examining the appended drawings which show, by way of example, an embodiment of the invention.
Sur ces dessins
La figure 1 est une coupe longitudinale de l'ensemble de l'électro-broche équipée de son système de refroidissement, et
La figure 2 est une coupe transversale faite suivant la ligne. 11-11 de la fig. 1.On these drawings
FIG. 1 is a longitudinal section of the assembly of the electro-spindle equipped with its cooling system, and
Figure 2 is a cross section taken along the line. 11-11 of fig. 1.
L'électro-broche équipée de son système de refroidissement représentée sur les figures 1 et 2 comporte un corps 1 de forme générale cylindrique tubulaire sur les extrémités duquel sont montés, respectivement, un palier avant 2 et un palier arrière 3 qui servent de supports à la broche rotative 5 de l'électro-broche, par l'intermédiaire de roulements 6 et 7 respectivement. L'extrémité avant du palier 2 est fermée par un chapeau 8. La broche rotative 5 constitue elle-même l'arbre du rotor 11 d'un moteur électrique synchrone 9 à aimants permanents formés de barreaux 12 et d'une cage d'écureuil qui permet le démarrage et amène le moteur à sa vitesse de synchronisme. The electro-spindle equipped with its cooling system shown in FIGS. 1 and 2 comprises a body 1 of generally tubular cylindrical shape on the ends of which are mounted, respectively, a front bearing 2 and a rear bearing 3 which serve as supports for the rotary spindle 5 of the electro-spindle, by means of bearings 6 and 7 respectively. The front end of the bearing 2 is closed by a cap 8. The rotary spindle 5 itself constitutes the shaft of the rotor 11 of a synchronous electric motor 9 with permanent magnets formed of bars 12 and a squirrel cage which allows starting and brings the engine to its synchronous speed.
Le nez 17 de la broche 5 est aménagé de toute manière classique appropriée de manière à pouvoir recevoir des outils d'usinage, tels que fraises ou forets, munis de queues coniques pourvues d'encoches de positionnement circonférentiel coopérant avec des dés 18 du nez de broche, suivant une structure bien connue qui ne fait pas partie de l'invention et qu'on ne décrira pas en détail ici, pas plus que les moyens habituels de blocage et de déblocage des outils. The nose 17 of the spindle 5 is arranged in any suitable conventional manner so as to be able to receive machining tools, such as milling cutters or drills, provided with conical shanks provided with circumferential positioning notches cooperating with dice 18 of the nose of spindle, according to a well-known structure which is not part of the invention and which will not be described in detail here, any more than the usual means for locking and unlocking tools.
Le système de refroidissement par circulation forcée d'air comporte un ventilateur désigné dans son ensemble par 21 et dont l'orifice de refoulement d'air est relié à une tuyère tubulaire annulaire 22 montée coaxialement sur l'extrémité arrière de l'électro-broche. Dans-l'exemple, le ventilateur est du type axial dont les pales obliques 21' sont montées sur l'arbre 23 du rotor 24 d'un moteur électrique asynchrone 25 dont le stator 26 est porté par une carcasse cylindrique 27 fixée sur l'extrémité arrière de la paroi
tubulaire intérieure 31 de la tuyère 22, l'extrémité arrière de la paroi extérieure 32 de ladite tuyère étant munie d'une grille de protection 33 destinée à éviter l'introduction de corps étrangers dans le ventilateur 21.The forced air circulation cooling system includes a fan designated as a whole by 21 and the air discharge orifice of which is connected to an annular tubular nozzle 22 mounted coaxially on the rear end of the electro-spindle . In the example, the fan is of the axial type, the oblique blades 21 'of which are mounted on the shaft 23 of the rotor 24 of an asynchronous electric motor 25, the stator 26 of which is carried by a cylindrical carcass 27 fixed on the rear end of the wall
inner tubular 31 of the nozzle 22, the rear end of the outer wall 32 of said nozzle being provided with a protective grid 33 intended to prevent the introduction of foreign bodies into the fan 21.
La majeure partie de la tuyère 22 est de forme générale tronconique qui va en s'élargissant de l'arrière vers l'avant de telle manière que l'extrémité avant de la paroi intérieure de la tuyère aboutit sur la périphérie du palier arrière 3. Le corps cylindrique 1 est pourvu d'ailettes longitudinales 36 qui s'étendent, en direction radiale, en regard de la section annulaire de 11 extrémité avant de la tuyère 22. The major part of the nozzle 22 is of generally frustoconical shape which widens from the rear towards the front in such a way that the front end of the internal wall of the nozzle ends on the periphery of the rear bearing 3. The cylindrical body 1 is provided with longitudinal fins 36 which extend, in the radial direction, opposite the annular section of the front end of the nozzle 22.
En d'autres termes, le diamètre de 1' extrémité avant de la paroi extérieure 32 de la tuyère correspond au diamètre sur lequel se trouvent les sommets des ailettes 36. Ainsi, les filets d'air soufflé par le ventilateur lèchent lesdites ailettes comme indiqué par les flèches 37 et évacuent dans l'atmosphère les calories qui prennent naissance au sein du moteur électrique principal 9.Etant donne que le ventilateur 21 est entrain par un moteur électrique asynchrone indépendant 25, sa vitesse est constante et son efficacité est toujours maximum, quelle que soit la valeur de la vitesse de rotation de la broche porte-outil 5 en fonction du diamètre de l'outil utilisé; de plus, le bruit qu'il produit est relativement faible
On ne reviendra pas sur les avantages de conception d'une telle électrobroche, puisque ceux-ci ont déjà été exposés en détail plus haut.In other words, the diameter of the front end of the outer wall 32 of the nozzle corresponds to the diameter on which the tops of the fins 36 are located. Thus, the threads of air blown by the fan lick said fins as indicated by the arrows 37 and discharge into the atmosphere the calories which arise within the main electric motor 9. As the fan 21 is driven by an independent asynchronous electric motor 25, its speed is constant and its efficiency is always maximum, whatever the value of the speed of rotation of the tool-holder spindle 5 as a function of the diameter of the tool used; moreover, the noise it produces is relatively low
We will not return to the design advantages of such an electrospindle, since these have already been described in detail above.
A titre de variante, la circulation forcée d'air de refroidissement produite par le ventilateur 25, pourrait être produite, non pas par refoulement, comme dans l'exemple décrit plus haut, mais par aspiration comme indiqué par les flèches 37' en traits interrompus. Au moins dans ce cas, il conviendrait que la tuyère 22 soit prolongée le long des ailettes 36 du corps cylindrique, comme indiqué en 16. As a variant, the forced circulation of cooling air produced by the fan 25 could be produced, not by discharge, as in the example described above, but by suction as indicated by the arrows 37 'in broken lines . At least in this case, the nozzle 22 should be extended along the fins 36 of the cylindrical body, as indicated in 16.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8104094A FR2500776A1 (en) | 1981-03-02 | 1981-03-02 | Electric motor powered spindle with forced air cooling - uses an auxiliary asynchronous motor to drive fan forcing air through duct onto stator fins of the main motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8104094A FR2500776A1 (en) | 1981-03-02 | 1981-03-02 | Electric motor powered spindle with forced air cooling - uses an auxiliary asynchronous motor to drive fan forcing air through duct onto stator fins of the main motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2500776A1 true FR2500776A1 (en) | 1982-09-03 |
| FR2500776B1 FR2500776B1 (en) | 1984-12-07 |
Family
ID=9255758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8104094A Granted FR2500776A1 (en) | 1981-03-02 | 1981-03-02 | Electric motor powered spindle with forced air cooling - uses an auxiliary asynchronous motor to drive fan forcing air through duct onto stator fins of the main motor |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2500776A1 (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4534686A (en) * | 1982-01-08 | 1985-08-13 | Fanuc Ltd. | Spindle head unit |
| US4580471A (en) * | 1982-05-17 | 1986-04-08 | Fanuc Limited | Motor-incorporated spindle head unit |
| EP0878896A4 (en) * | 1996-11-07 | 1999-04-28 | Fanuc Ltd | Air cooled motor |
| EP1065028A1 (en) * | 1999-06-30 | 2001-01-03 | H.S.D. S.r.l. | A drive spindle |
| EP1819613A4 (en) * | 2004-12-08 | 2009-03-04 | Portec Inc | Motorized pulley |
| EP2065126A1 (en) | 2007-11-27 | 2009-06-03 | Veneta Elettro Meccanica s.r.l. | Servo-ventilated electrospindle for machining marble, granite and other stony materials |
| EP2151725A1 (en) | 2008-08-06 | 2010-02-10 | Forest Line Albert | Method and device for accurately detecting contact between a rotating tool and a part machined by the tool |
| FR3000628A1 (en) * | 2012-12-27 | 2014-07-04 | Technofan | DEVICE FOR ELECTRICALLY DRIVING A LOAD |
| CN105108548A (en) * | 2015-09-09 | 2015-12-02 | 江苏华雕机械有限公司 | Pneumatic and manual double-purpose tool-changing oriented air-cooling electric spindle for composite carving and milling |
| CN106041635A (en) * | 2016-07-22 | 2016-10-26 | 宁波海天精工股份有限公司 | Thermal insulation cooling mechanism of electric main shaft bearing pedestal |
| WO2019098915A1 (en) * | 2017-11-16 | 2019-05-23 | Novator Ab | A drilling machine and a method of cooling a drilling machine |
| EP3876399A1 (en) * | 2020-03-06 | 2021-09-08 | ALSTOM Transport Technologies | Motor comprising a built-in fan |
| CN113798553A (en) * | 2021-09-06 | 2021-12-17 | 浙江闽立电动工具有限公司 | A high-efficiency magnetic drill |
| IT202100032816A1 (en) * | 2021-12-28 | 2023-06-28 | Scm Group Spa | Improved electrospindle |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU174048A1 (en) * | Ю. Д. Врагов, Ю. Н. Гондин , В. В. Самойлов | DEVICE FOR ROTATION OF SPINDLE OF METAL-CUTTING MACHINES | ||
| US2323850A (en) * | 1940-10-07 | 1943-07-06 | Heald Machine Co | Air cooled spindle mounting for machine tools and the like |
| US2343875A (en) * | 1941-08-09 | 1944-03-14 | Bell Aircraft Corp | Machine tool |
| US3219855A (en) * | 1963-08-07 | 1965-11-23 | Gorton George Machine Co | Compressed air cooled spindle unit |
| DE2248511A1 (en) * | 1967-12-12 | 1973-09-13 | Mladen Mazuranic-Jankovic | MACHINE FOR GEARING IN THE ABROWING PROCESS |
| FR2177070A1 (en) * | 1972-03-22 | 1973-11-02 | Rockwell International Corp | |
| DE2453504A1 (en) * | 1974-11-12 | 1976-05-13 | Fortuna Werke Maschf Ag | Ventilator on tool spindle electric motor - has magnetic coupling part fitted to impeller, other part to spindle |
| FR2384585A1 (en) * | 1977-03-25 | 1978-10-20 | Meidensha Electric Mfg Co Ltd | Motor driven milling head - has mandrel with tapped hole secured by component slid through hollow motor shaft |
-
1981
- 1981-03-02 FR FR8104094A patent/FR2500776A1/en active Granted
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU174048A1 (en) * | Ю. Д. Врагов, Ю. Н. Гондин , В. В. Самойлов | DEVICE FOR ROTATION OF SPINDLE OF METAL-CUTTING MACHINES | ||
| US2323850A (en) * | 1940-10-07 | 1943-07-06 | Heald Machine Co | Air cooled spindle mounting for machine tools and the like |
| US2343875A (en) * | 1941-08-09 | 1944-03-14 | Bell Aircraft Corp | Machine tool |
| US3219855A (en) * | 1963-08-07 | 1965-11-23 | Gorton George Machine Co | Compressed air cooled spindle unit |
| DE2248511A1 (en) * | 1967-12-12 | 1973-09-13 | Mladen Mazuranic-Jankovic | MACHINE FOR GEARING IN THE ABROWING PROCESS |
| FR2177070A1 (en) * | 1972-03-22 | 1973-11-02 | Rockwell International Corp | |
| DE2453504A1 (en) * | 1974-11-12 | 1976-05-13 | Fortuna Werke Maschf Ag | Ventilator on tool spindle electric motor - has magnetic coupling part fitted to impeller, other part to spindle |
| FR2384585A1 (en) * | 1977-03-25 | 1978-10-20 | Meidensha Electric Mfg Co Ltd | Motor driven milling head - has mandrel with tapped hole secured by component slid through hollow motor shaft |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4534686A (en) * | 1982-01-08 | 1985-08-13 | Fanuc Ltd. | Spindle head unit |
| US4580471A (en) * | 1982-05-17 | 1986-04-08 | Fanuc Limited | Motor-incorporated spindle head unit |
| EP0878896A4 (en) * | 1996-11-07 | 1999-04-28 | Fanuc Ltd | Air cooled motor |
| US6078115A (en) * | 1996-11-07 | 2000-06-20 | Fanuc Ltd | Air-cooled motor |
| EP1065028A1 (en) * | 1999-06-30 | 2001-01-03 | H.S.D. S.r.l. | A drive spindle |
| US6472782B1 (en) | 1999-06-30 | 2002-10-29 | H.S.D. S.R.L. | Drive spindle with two-stage static deflector |
| EP1819613A4 (en) * | 2004-12-08 | 2009-03-04 | Portec Inc | Motorized pulley |
| EP2065126A1 (en) | 2007-11-27 | 2009-06-03 | Veneta Elettro Meccanica s.r.l. | Servo-ventilated electrospindle for machining marble, granite and other stony materials |
| EP2151725A1 (en) | 2008-08-06 | 2010-02-10 | Forest Line Albert | Method and device for accurately detecting contact between a rotating tool and a part machined by the tool |
| FR3000628A1 (en) * | 2012-12-27 | 2014-07-04 | Technofan | DEVICE FOR ELECTRICALLY DRIVING A LOAD |
| CN105108548A (en) * | 2015-09-09 | 2015-12-02 | 江苏华雕机械有限公司 | Pneumatic and manual double-purpose tool-changing oriented air-cooling electric spindle for composite carving and milling |
| CN106041635A (en) * | 2016-07-22 | 2016-10-26 | 宁波海天精工股份有限公司 | Thermal insulation cooling mechanism of electric main shaft bearing pedestal |
| CN106041635B (en) * | 2016-07-22 | 2018-01-05 | 宁波海天精工股份有限公司 | A kind of heat-insulated cooling body of electric mainshaft bearing seat |
| WO2019098915A1 (en) * | 2017-11-16 | 2019-05-23 | Novator Ab | A drilling machine and a method of cooling a drilling machine |
| EP3876399A1 (en) * | 2020-03-06 | 2021-09-08 | ALSTOM Transport Technologies | Motor comprising a built-in fan |
| FR3108002A1 (en) * | 2020-03-06 | 2021-09-10 | Alstom Transport Technologies | Motor including integrated fan |
| CN113798553A (en) * | 2021-09-06 | 2021-12-17 | 浙江闽立电动工具有限公司 | A high-efficiency magnetic drill |
| IT202100032816A1 (en) * | 2021-12-28 | 2023-06-28 | Scm Group Spa | Improved electrospindle |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2500776B1 (en) | 1984-12-07 |
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