EP0738197B1 - Procede et appareil de meulage - Google Patents
Procede et appareil de meulage Download PDFInfo
- Publication number
- EP0738197B1 EP0738197B1 EP94904232A EP94904232A EP0738197B1 EP 0738197 B1 EP0738197 B1 EP 0738197B1 EP 94904232 A EP94904232 A EP 94904232A EP 94904232 A EP94904232 A EP 94904232A EP 0738197 B1 EP0738197 B1 EP 0738197B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- workpiece
- grinding wheel
- grinding
- speed
- feed
- 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
Links
Images
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
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/02—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation according to the instantaneous size and required size of the workpiece acted upon, the measuring or gauging being continuous or intermittent
-
- 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
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
-
- 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
- B24B41/007—Weight compensation; Temperature compensation; Vibration damping
Definitions
- This invention relates to a method of grinding a workpiece having a cylindrical surface and to apparatus for carrying out said method.
- chatter-marks can be reduced by absolute truing of the grinding wheel, but this is time consuming and expensive, especially when the grinding surface is a super-abrasive such as diamond or CBN.
- the wheel and workpiece rotational speeds are controlled to minimise the growth of charter and to optimise the grinding process. This is achieved by measuring the precession of lobes about the grinding wheel and workpiece and determining an exponential charter growth index using the measured lobe precessions.
- the index is stated to be a measure of the rate of growth of charter and is also a measure of the stability of the grinding process concerned.
- a control unit is used to generate control signals for the motors which rotate the grinding wheel and workpiece respectively.
- a method of grinding a cylindrical workpiece surface in which the speed of rotation of the grinding wheel and/or the speed of rotation of the workpiece is changed in a relatively slow manner one or more times during the final stage of grinding, such rotational speed change extending into the final dwell period in which sizing occurs, thereby to reduce chatter-marks on the workpiece, the speed change effected not being dependent on vibration sensing of the grinding wheel or the workpiece.
- the method and apparatus of the invention may be applied to internal as well as external grinding.
- the rotational speed variation is preferably practised by rotational speed change which includes one or more changes in the rotational speed of the workpiece.
- any change made will usually be decelerative.
- the rotational speed of the grinding wheel is kept constant.
- the one or more rotational speed changes may be initiated either after a predetermined number of rotations of the workpiece where the number of turns per grinding cycle is controlled and/or at a predetermined feed distance before the feed position for final sizing, as indicated in more detail below.
- the speed variations effected may therefore be linear, reduce or increase at a rate relative to the above variables, or be of other controlled forms such as sinusoidal.
- the speed change is normally initiated during the slow approach to size feed and always extends into the final dwell period in which sizing occurs.
- Figure 1 is a typical feed diagram for the grinding wheel in a grinding process for grinding a cylindrical workpiece.
- the grinding wheel feed includes a fine feed period 10 immediately prior to a stationary final dwell period 12 (size dwell) in which sizing occurs.
- a change in the rotational speed of the workpiece is initiated in the fine feed period, and this speed change or one or more further speed changes is extended into at least part of the final dwell period 12.
- the means 22 is preferably constituted by a servo-controller, which automatically initiates one or more changes in the workspeed at the aforesaid time and for the aforesaid period, for example dependently on the feed position, the number of turns of the workpiece in the grinding cycle, and/or component size.
- the or each change effected is not sudden, but is a relatively slow change which may be linear, sinusoidal or of any other desired form.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Claims (9)
- Une méthode de meulage d'une surface de pièce à usiner cylindrique dans laquelle la vitesse de rotation de la meule et/ou la vitesse de rotation de la pièce à usiner sont changées d'une manière relativement ente une ou plusieurs fois au cours de la phase finale du meulage, un tel changement de vitesse de rotation se prolongeant dans le temps d'arrêt final au cours duquel le calibrage a lieu, afin de réduire les marques de broutage sur la pièce à usiner, le changement de vitesse effectué ne dépendant pas de la détection des vibrations de la meule ou de la pièce à usiner.
- L'appareil de meulage d'une surface de pièce à usiner cylindrique comprenant une machine de meulage équipée d'une meule, d'une avance de meule, d'une unité de commande d'avance de meule, d'un dispositif de rotation de la meule, d'un support de pièce à usiner, d'un dispositif de rotation de la pièce à usiner, et d'un dispositif de commande adapté pour changer automatiquement la vitesse de rotation de la meule et/ou de la pièce à usiner d'une manière relativement lente, au cours de la phase finale du meulage et se prolongeant dans le temps d'arrêt final au cours duquel le calibrage a lieu afin que la vitesse de rotation de la meule et/ou de la pièce à usiner puissent être changées une ou plusieurs fois dans le but de réduire les marques de broutage sur la pièce à usiner, le changement de vitesse effectué ne dépendant pas de la détection des vibrations de la meule ou de la pièce à usiner.
- Une méthode conformément à la revendication 1 ou un appareil conformément à la revendication 2 dans lequel le changement de la vitesse de rotation inclut un ou plusieurs changements de la vitesse de rotation de la pièce à usiner.
- Une méthode ou un appareil conformément à la revendication 1 ou à la revendication 2 dans lequel le changement de vitesse est du type à décélération.
- Une méthode ou un appareil conformément à n'importe laquelle des revendications 1 à 4 dans laquelle la vitesse de la meule est gardée constante.
- Une méthode ou un appareil conformément à n'importe laquelle des revendications 1 à 5 dans lequel un ou plusieurs changements de vitesse de rotation sont initiés soit après un nombre prédéterminé de rotations de la pièce à usiner, où le nombre de tours par cycle de meulage est contrôle, et/ou à une distance d'avance prédéterminée avant la position d'avance pour le calibrage final.
- Une méthode ou un appareil conformément à n'importe laquelle des revendications 1 à 5 dans lequel la vitesse de rotation est servocommandée en fonction du temps, de la position d'avance de la meule, de la taille du composant et/ou du nombre de tours du composant.
- Une méthode ou un appareil conformément à la revendication 6 ou 7 dans lequel les variations de vitesse effectuées sont linéaires ou sinusoïdales, et diminuent ou augmentent à un taux relatif auxdites variables.
- Une méthode ou un appareil conformément à l'une des revendications précédente dans lequel le changement de vitesse est initié au cours de l'approche lente d'avance de calibrage.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9215349A GB2268895B (en) | 1992-07-18 | 1992-07-18 | Grinding method and apparatus |
PCT/GB1994/000047 WO1995019241A1 (fr) | 1992-07-18 | 1994-01-13 | Procede et appareil de meulage |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0738197A1 EP0738197A1 (fr) | 1996-10-23 |
EP0738197B1 true EP0738197B1 (fr) | 1999-10-06 |
Family
ID=26301281
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94904232A Expired - Lifetime EP0738197B1 (fr) | 1992-07-18 | 1994-01-13 | Procede et appareil de meulage |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0738197B1 (fr) |
AU (1) | AU5837194A (fr) |
DE (1) | DE69421094T2 (fr) |
ES (1) | ES2138068T3 (fr) |
GB (1) | GB2268895B (fr) |
WO (1) | WO1995019241A1 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2291608B (en) * | 1994-07-23 | 1996-11-06 | Western Atlas Uk Ltd | Grinding method and apparatus |
EP1224057B1 (fr) * | 1999-10-27 | 2003-07-09 | Unova U.K. Limited | Procede de rectification de maneton |
CN108555697A (zh) * | 2017-11-02 | 2018-09-21 | 中国航发哈尔滨东安发动机有限公司 | 一种转子叶尖的磨削方法 |
JP2023000307A (ja) * | 2021-06-17 | 2023-01-04 | 株式会社ディスコ | 研削装置 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH595187A5 (fr) * | 1975-12-20 | 1978-02-15 | Studer Ag Fritz | |
EP0116267B1 (fr) * | 1982-12-16 | 1988-01-27 | CENTRE DE RECHERCHES SCIENTIFIQUES ET TECHNIQUES DE L'INDUSTRIE DES FABRICATIONS METALLIQUES, en abrégé C.R.I.F. | Procédé et dispositif pour rectifier une pièce quelconque par enlèvement de matière à l'aide d'une meule |
US4604834A (en) * | 1985-10-03 | 1986-08-12 | General Electric Company | Method and apparatus for optimizing grinding |
-
1992
- 1992-07-18 GB GB9215349A patent/GB2268895B/en not_active Expired - Fee Related
-
1994
- 1994-01-13 AU AU58371/94A patent/AU5837194A/en not_active Abandoned
- 1994-01-13 EP EP94904232A patent/EP0738197B1/fr not_active Expired - Lifetime
- 1994-01-13 WO PCT/GB1994/000047 patent/WO1995019241A1/fr active IP Right Grant
- 1994-01-13 DE DE69421094T patent/DE69421094T2/de not_active Expired - Fee Related
- 1994-01-13 ES ES94904232T patent/ES2138068T3/es not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
GB2268895B (en) | 1995-06-28 |
GB2268895A (en) | 1994-01-26 |
DE69421094D1 (de) | 1999-11-11 |
DE69421094T2 (de) | 2000-01-20 |
ES2138068T3 (es) | 2000-01-01 |
GB9215349D0 (en) | 1992-09-02 |
EP0738197A1 (fr) | 1996-10-23 |
WO1995019241A1 (fr) | 1995-07-20 |
AU5837194A (en) | 1995-08-01 |
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