EP0058177A1 - Device for machining cutting tools made of hard metal or steel - Google Patents
Device for machining cutting tools made of hard metal or steelInfo
- Publication number
- EP0058177A1 EP0058177A1 EP19810902296 EP81902296A EP0058177A1 EP 0058177 A1 EP0058177 A1 EP 0058177A1 EP 19810902296 EP19810902296 EP 19810902296 EP 81902296 A EP81902296 A EP 81902296A EP 0058177 A1 EP0058177 A1 EP 0058177A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flute
- grinding wheel
- grinding
- steel
- cutting tools
- 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.)
- Withdrawn
Links
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
- B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
- B24B19/02—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements
- B24B19/04—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements for fluting drill shanks
Definitions
- the present invention relates to a device for machining cutting tools made of hard metal or steel, comprising a first grinding wheel for straightening a flute in the solid and a second grinding wheel for straightening the back of the flute.
- the flute is first cut and ground with a first wheel, then a second wheel is used to correct the back of said flute. For each flute and its back, it is therefore necessary to make two passes, which causes time-outs to adjust the grindstones.
- the object of the present invention is to remedy these drawbacks and to reduce, on the one hand, the adjustment time by approximately 80% and, on the other hand, the machining time by 2/3.
- This object is achieved by the device according to the invention which is characterized in that the two grinding wheels are driven separately but act simultaneously in a single pass.
- FIG. 1 is a schematic view of the grinding wheels in the axis of the workpiece, in this case a drill bit
- FIG. 2 is a plan view of the grinding wheels and the drill bit, the grinding wheel of the back of the flute being shown parallel to the grinding wheel in the full of the flute to simplify the drawing, the arrows indicating the movements that the grinding wheels are likely to perform.
- the device shown shows the machining of the helical grooves and the adjustment of a bit.
- This device comprises a first grinding wheel 1 making it possible to straighten the flutes 2 of the drill bit 3 in full.
- This grinding wheel 1 is mounted on a carriage (not shown) capable of being moved in three planes perpendicular to each other and makes an angle determined from the pitch of the wick 3 with the horizontal axis of said wick which moves along its longitudinal axis (fig. 1 and 2).
- a second grinding wheel 4 is provided to perform the rectification of the back of the flute.
- this grinding wheel has been shown parallel to the grinding wheel 1 to simplify the drawing but, in reality, its axis is inclined by an angle ⁇ adjustable relative to the horizontal plane (fig.
- the grinding wheel 4 is movable in height and in two planes which intersect at right angles. Grinding wheels 1 and 4 are driven separately but work at the same time. Thanks to this simultaneous machining, the production time is reduced. two thirds compared to the machines which work as indicated in the preamble. Furthermore, the machining precision is increased, since the settings are deleted.
- the drive and advance of the drill bit 3 as well as the variations in the positions of the two grinding wheels 1, 4 are controlled by known copying devices and synchronized with the feed, so that the grinding wheels are brought automatically into the adequate position on the workpiece.
Abstract
Le dispositif comprend une premiere meule (1) pour rectifier dans le plein la goujure (2) d'une meche (3) et une seconde meule (4) pour rectifier dans le plein le dos de ladite goujure. Les deux meules (1, 4) travaillent en meme temps et sont reglables independamment dans leurs angles, leurs positions et leurs centrages. Grace a cette disposition, les temps de reglage sont reduits de 80% et ceux de production de 2/3. La precision d'usinage est augmentee par rapport aux dispositifs connus.The device comprises a first grinding wheel (1) for straightening the flute (2) in the solid with a wick (3) and a second grinding wheel (4) for fully grinding the back of said flute. The two grinding wheels (1, 4) work at the same time and are independently adjustable in their angles, their positions and their centering. Thanks to this arrangement, adjustment times are reduced by 80% and production times by 2/3. The machining precision is increased compared to known devices.
Description
Dispositif pour usiner des outils de coupe en métal dur ou en acier Device for machining cutting tools of hard metal or steel
La présente invention a pour objet un dispositif pour usi ner des outils de coupe en métal dur ou en acier, comprenant une première meule pour rectifier dans le plein une goujure et une seconde meule pour rectifier dans le plein le dos de la goujure.The present invention relates to a device for machining cutting tools made of hard metal or steel, comprising a first grinding wheel for straightening a flute in the solid and a second grinding wheel for straightening the back of the flute.
Dans les machines connues pour usiner des outils de coupe tels que mèches, mèches à centrer, alésoirs, fraises en bout, fraises circulaires, etc., on taille et rectifie d'abord la goujure avec une première meule, puis on utilise une seconde meule pour rectifier le dos de ladite goujure. Pour chaque goujure et son dos, il faut donc effec tuer deux passages, ce qui provoque des temps morts pour régler les meules.In known machines for machining cutting tools such as bits, centering bits, reamers, end mills, circular milling cutters, etc., the flute is first cut and ground with a first wheel, then a second wheel is used to correct the back of said flute. For each flute and its back, it is therefore necessary to make two passes, which causes time-outs to adjust the grindstones.
La présente invention a pour but de remédier à ces inconvénients et de réduire, d'une part, le temps de réglage d'environ 80 % et, d'autre part, le temps d'usinage de 2/3. Ce but est atteint par le dispositif selon l'invention qui est caractérisé en ce que les deux meules sont entraînées séparément mais agissent simultanément en une seule passe.The object of the present invention is to remedy these drawbacks and to reduce, on the one hand, the adjustment time by approximately 80% and, on the other hand, the machining time by 2/3. This object is achieved by the device according to the invention which is characterized in that the two grinding wheels are driven separately but act simultaneously in a single pass.
Le dessin annexé représente, à titre d'exemple, une forme d'exécution du dispositif objet de l'invention. La fig. 1 est une vue schématique des meules dans l'axe de la pièce à usiner, en l'occurrence une mèche, et la fig. 2 est une vue en plan des meules et de la mèche, la meule de rectifiage du dos de la goujure étant représentée parallèle à la meule de rectifiage dans le plein de la goujure pour simplifier le dessin, les flèches indiquant les déplacements que les meules sont susceptibles d'effectuer.The accompanying drawing shows, by way of example, an embodiment of the device which is the subject of the invention. Fig. 1 is a schematic view of the grinding wheels in the axis of the workpiece, in this case a drill bit, and FIG. 2 is a plan view of the grinding wheels and the drill bit, the grinding wheel of the back of the flute being shown parallel to the grinding wheel in the full of the flute to simplify the drawing, the arrows indicating the movements that the grinding wheels are likely to perform.
Le dispositif représenté montre l'usinage des rainures hélicoïdales et le détalonnage d'une mèche. Ce dispositif comprend une première meule 1 permettant de rectifier dans le plein les goujures 2 de la mèche 3. Cette meule 1 est montée sur un chariot (non représenté) susceptible d'être
déplacé dans trois plans perpendiculaires les uns aux autres et fait un angle déterminé d' après le pas de la mèche 3 avec l'axe horizontal de ladite mèche qui se déplace selon son axe longitudinal (fig. 1 et 2) . Pour effectuer le rectifiage du dos de la goujure, en l'occurrence le détalonnage, on a prévu une seconde meule 4. Dans la fig. 2, cette meule a été représentée parallèle à la meule 1 pour simplifier le dessin mais, en réalité, son axe est incliné d'un angle α réglable par rapport au plan horizontal (fig. 1) . La meule 4 est déplaçable en hauteur et dans deux plans qui se coupent à angle droit. Les meules 1 et 4 sont entraînées séparément mais travaillent en même temps. Grâce à cet usinage simultané, le temps de production est réduit des. deux tiers par rapport aux machines qui travaillent comme indiqué dans le préambule. Par ailleurs, la précision d'usinage est augmentée, vu que les réglages sont supprimés.The device shown shows the machining of the helical grooves and the adjustment of a bit. This device comprises a first grinding wheel 1 making it possible to straighten the flutes 2 of the drill bit 3 in full. This grinding wheel 1 is mounted on a carriage (not shown) capable of being moved in three planes perpendicular to each other and makes an angle determined from the pitch of the wick 3 with the horizontal axis of said wick which moves along its longitudinal axis (fig. 1 and 2). To perform the rectification of the back of the flute, in this case the recalibration, a second grinding wheel 4 is provided. In FIG. 2, this grinding wheel has been shown parallel to the grinding wheel 1 to simplify the drawing but, in reality, its axis is inclined by an angle α adjustable relative to the horizontal plane (fig. 1). The grinding wheel 4 is movable in height and in two planes which intersect at right angles. Grinding wheels 1 and 4 are driven separately but work at the same time. Thanks to this simultaneous machining, the production time is reduced. two thirds compared to the machines which work as indicated in the preamble. Furthermore, the machining precision is increased, since the settings are deleted.
L'entraînement et l'avance de la mèche 3 ainsi que les variations des positions des deux meules 1, 4 sont cαmman- dés par des dispositifs de copiage connus et synchronisés avec l'avance, de sorte que les meules sont amenées automatiquement dans la position adéquate sur la pièce en travail.
The drive and advance of the drill bit 3 as well as the variations in the positions of the two grinding wheels 1, 4 are controlled by known copying devices and synchronized with the feed, so that the grinding wheels are brought automatically into the adequate position on the workpiece.
Claims
1. Dispositif pour usiner des outils de coupe en métal dur ou en acier, comprenant une première meule pour rectifier dans le plein une goujure et une seconde meule pour rectifier dans le plein le dos de la goujure, caractérisé en ce que les deux meules (1, 4) sont entraînées séparément mais agissent simultanément en une seule passe.1. Device for machining cutting tools made of hard metal or steel, comprising a first grinding wheel to straighten a flute fully and a second grinding wheel to straighten the back of the flute, characterized in that the two grinding wheels ( 1, 4) are driven separately but act simultaneously in a single pass.
2. Dispositif selon la revendication 1, caractérisé en ce que des moyens permettent de régler les deux meules (1,2. Device according to claim 1, characterized in that means make it possible to adjust the two grinding wheels (1,
4) dans leurs angles, leurs positions et leurs centrages indépendamment.4) in their angles, their positions and their centering independently.
3. Dispositif selon la revendication 2, caractérisé en ce que les positions des deux meules (1, 4) sont commandées par des dispositifs de copiage synchronisés avec l'avance de la pièce en travail (3) . 3. Device according to claim 2, characterized in that the positions of the two grinding wheels (1, 4) are controlled by copying devices synchronized with the advance of the workpiece (3).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH6333/80 | 1980-08-22 | ||
| CH633380A CH628832A5 (en) | 1980-08-22 | 1980-08-22 | Device for machining cutting tools hard metal or steel. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0058177A1 true EP0058177A1 (en) | 1982-08-25 |
Family
ID=4307887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19810902296 Withdrawn EP0058177A1 (en) | 1980-08-22 | 1981-08-19 | Device for machining cutting tools made of hard metal or steel |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0058177A1 (en) |
| JP (1) | JPS57501228A (en) |
| CH (1) | CH628832A5 (en) |
| WO (1) | WO1982000610A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2654663A1 (en) * | 1989-11-17 | 1991-05-24 | Diamoutils | Diamond-containing rotary cutting tool (cutter), and method for producing it |
| DE10027544A1 (en) * | 2000-06-02 | 2001-12-13 | Kennametal Inc | Drill tip for a twist drill and method for producing a flute in the area of a drill tip for a twist drill |
| GB0016943D0 (en) * | 2000-07-10 | 2000-08-30 | Dormer Tools Sheffield Ltd | Drills and their manufacture |
| GB0701242D0 (en) | 2007-01-23 | 2007-02-28 | Rolls Royce Plc | Milling cutter manufacturing method |
| EP3804906A1 (en) | 2019-10-10 | 2021-04-14 | Fraisa SA | Method for producing a sheath-side cutting geometry in a full material shaft tool for material processing |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR836107A (en) * | 1937-09-20 | 1939-01-11 | Method of manufacturing, from a hardened steel bar and in a continuous manner, twist drills or the like and automatic machine for carrying out the method | |
| US2477730A (en) * | 1941-07-28 | 1949-08-02 | Fouquet Eugene | Automatic machine for grinding drills |
| DE1577301C3 (en) * | 1966-08-03 | 1981-04-09 | Braum, H. Normann | Machine for making twist drills |
-
1980
- 1980-08-22 CH CH633380A patent/CH628832A5/en not_active IP Right Cessation
-
1981
- 1981-08-19 EP EP19810902296 patent/EP0058177A1/en not_active Withdrawn
- 1981-08-19 WO PCT/CH1981/000091 patent/WO1982000610A1/en not_active Application Discontinuation
- 1981-08-19 JP JP50267181A patent/JPS57501228A/ja active Pending
Non-Patent Citations (1)
| Title |
|---|
| See references of WO8200610A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CH628832A5 (en) | 1982-03-31 |
| JPS57501228A (en) | 1982-07-15 |
| WO1982000610A1 (en) | 1982-03-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 19820421 |
|
| AK | Designated contracting states |
Designated state(s): DE FR NL |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 19831112 |