FR2746049A1 - Pliers formed with two branches - Google Patents
Pliers formed with two branches Download PDFInfo
- Publication number
- FR2746049A1 FR2746049A1 FR9603355A FR9603355A FR2746049A1 FR 2746049 A1 FR2746049 A1 FR 2746049A1 FR 9603355 A FR9603355 A FR 9603355A FR 9603355 A FR9603355 A FR 9603355A FR 2746049 A1 FR2746049 A1 FR 2746049A1
- Authority
- FR
- France
- Prior art keywords
- branches
- gripping
- gripping surfaces
- clamp
- electro
- 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
- 210000003323 beak Anatomy 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- 229910000599 Cr alloy Inorganic materials 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000011651 chromium Substances 0.000 claims description 3
- 239000000788 chromium alloy Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 210000001331 nose Anatomy 0.000 abstract 3
- 238000003486 chemical etching Methods 0.000 abstract 1
- 238000004381 surface treatment Methods 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H9/00—Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
- B23H9/008—Surface roughening or texturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B7/00—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
- B25B7/02—Jaws
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
Abstract
Description
La présente invention concerne une pince ainsi qu'un procédé de fabrication d'une pince. The present invention relates to a clamp and a method of manufacturing a clamp.
On connaît déjà dans l'état de la technique une pince du type comprenant deux branches munies chacune d'une surface de préhension d'un objet et reliées entre elles de manière à permettre le rapprochement des surfaces de préhension l'une vers l'autre ou l'écartement de ces surfaces l'une de l'autre. Already known in the prior art pliers of the type comprising two branches each provided with a gripping surface of an object and connected together so as to allow the gripping surfaces to move towards one another or the spacing of these surfaces from each other.
De façon classique, les surfaces de préhension sont formées sur des extrémités distales ou becs des branches. Conventionally, the gripping surfaces are formed on distal ends or beaks of the branches.
Habituellement, les surfaces de préhension comportent des dentures usinées sur les branches délimitant des stries successives séparées par des arêtes saillantes. Ces stries favorisent les amorces de rupture des branches. Cet inconvénient est d'autant plus prononcé que les extrémités distales des branches portant les surfaces de préhension sont longues et effilées. Usually, the gripping surfaces have teeth machined on the branches delimiting successive striations separated by projecting edges. These streaks favor the incipient fractures of the branches. This drawback is all the more pronounced as the distal ends of the branches carrying the gripping surfaces are long and tapered.
L'invention a pour but de proposer une pince dont les branches sont munies de surfaces de préhension n'altèrant pas la résistance et la solidité de ces branches. The object of the invention is to propose a clamp whose branches are provided with gripping surfaces which do not alter the resistance and solidity of these branches.
A cet effet, l'invention a pour objet une pince du type précité, caractérisée en ce que les surfaces de préhension sont formées par électro-érosion de portions de surfaces des branches. To this end, the invention relates to a clamp of the aforementioned type, characterized in that the gripping surfaces are formed by electro-erosion of portions of surfaces of the branches.
Suivant d'autres caractéristiques de cette pince:
- les surfaces de préhension sont formées sur des extrémités distales ou becs des branches
- les extrémités distales des branches sont coudées
- les portions de surface délimitent des surépaisseurs des becs dans la direction de rapprochement des branches
- les portions de surface sont sensiblement planes;
- les branches sont articulées entre elles au moyen d'une broche.According to other characteristics of this clamp:
- the gripping surfaces are formed on distal ends or beaks of the branches
- the distal ends of the branches are bent
- the surface portions delimit extra thicknesses of the spouts in the direction of approach of the branches
- the surface portions are substantially flat;
- the branches are hinged together by means of a pin.
L'invention a également pour objet un procédé de fabrication d'une pince comportant deux branches munies chacune d'une surface de préhension d'un objet et reliées entre elles de manière à permettre le rapprochement des surfaces de préhension l'une vers l'autre ou l'écartement de ces surfaces l'une de l'autre, caractérisé en ce que l'on forme les surfaces de préhension par électro-érosion de portions de surface des branches. The invention also relates to a method of manufacturing a gripper comprising two branches each provided with a gripping surface of an object and connected together so as to allow the gripping surfaces to move towards one another. other or the spacing of these surfaces from each other, characterized in that the gripping surfaces are formed by electro-erosion of surface portions of the branches.
Suivant d'autres caractéristiques de ce procédé
- les surfaces de préhension sont formées sur les branches avant de relier ces branches entre elles
- après formation des surfaces de préhension, les branches sont revêtues de chrome ou d'un alliage de chrome.According to other characteristics of this process
- the gripping surfaces are formed on the branches before connecting these branches together
- after the gripping surfaces have been formed, the arms are coated with chromium or a chromium alloy.
L'invention sera mieux comprise à la lecture de la description qui va suivre donnée uniquement à titre d'exemple et faite en se référant aux dessins annexés dans lesquels
- la figure 1 est une vue en perspective d'une pince selon l'invention ;
- la figure 2 est une vue de détail, de dessus, d'une extrémité distale d'une branche de la pince représentée à la figure 1
- la figure 3 est une vue schématique d'une installation d'électro-érosion pour la formation des surfaces de préhension de la pince représentée à la figure 1.The invention will be better understood on reading the description which follows, given solely by way of example and made with reference to the appended drawings in which
- Figure 1 is a perspective view of pliers according to the invention;
- Figure 2 is a detail view, from above, of a distal end of a branch of the forceps shown in Figure 1
FIG. 3 is a schematic view of an electro-erosion installation for the formation of the gripping surfaces of the clamp shown in FIG. 1.
On a représenté sur la figure 1 une pince 10 selon l'invention comprenant deux branches 12 articulées entre elles au moyens d'une broche 14. FIG. 1 shows a clamp 10 according to the invention comprising two branches 12 hinged together by means of a pin 14.
Chaque branche 12 comporte une extrémité proximale 16 formant poignée de saisie de la pince et une extrémité distale 18 ou bec pour la préhension d'un objet par la pince. Each branch 12 has a proximal end 16 forming a grip for gripping the pliers and a distal end 18 or spout for gripping an object by the pliers.
Dans l'exemple illustré sur la figure 1, les becs 18 sont coudés. In the example illustrated in Figure 1, the spouts 18 are bent.
Le bec 18 de chaque branche 12 comporte une surface 20 pour la préhension d'un objet. The spout 18 of each branch 12 has a surface 20 for gripping an object.
Les branches 12 sont articulées entre elles de manière à permettre le rapprochement des surfaces de préhension 20 l'une vers l'autre ou l'écartement de ces surfaces l'une de l'autre. The branches 12 are hinged together so as to allow the gripping surfaces 20 to move towards one another or the spacing of these surfaces from each other.
Les surfaces de préhension 20 sont formées par électro-érosion de portions de surface des branches. De préférence, ces portions de surface sont sensiblement planes. The gripping surfaces 20 are formed by electro-erosion of surface portions of the branches. Preferably, these surface portions are substantially planar.
En se référant à la figure 2, on voit que les portions de surface électro-érodées délimitent des surépaisseurs des becs dans la direction de rapprochement de ces branches. Un décrochement 22 sépare la surface de préhension 20 du reste de la branche correspondante 12. Referring to FIG. 2, it can be seen that the electro-eroded surface portions delimit extra thicknesses of the spouts in the direction of approach of these branches. A recess 22 separates the gripping surface 20 from the rest of the corresponding branch 12.
Dans le cas de la pince 10 illustrée sur la figure 1, les surfaces de préhension sont formées séparément sur chaque branche avant de relier les branches entre elles. In the case of the clamp 10 illustrated in Figure 1, the gripping surfaces are formed separately on each branch before connecting the branches together.
L'électro-érosion des surfaces de préhension est réalisée au moyen d'une installation classique 24 qui est illustrée sur la figure 3. The electro-erosion of the gripping surfaces is carried out by means of a conventional installation 24 which is illustrated in FIG. 3.
L'installation 24 comporte une cuve 26 contenant un liquide diélectrique 28 classique. The installation 24 comprises a tank 26 containing a conventional dielectric liquid 28.
L'installation 24 comporte de plus deux électrodes 30,32 reliées par un circuit électrique 33 aux bornes d'un générateur de tension continue 34. The installation 24 further comprises two electrodes 30, 32 connected by an electrical circuit 33 to the terminals of a DC voltage generator 34.
Une première électrode 30, immergée dans le liquide diélectrique 28, forme un support pour un bec 18 de branche sur lequel on veut former une surface de préhension 20. A first electrode 30, immersed in the dielectric liquid 28, forms a support for a branch nozzle 18 on which it is desired to form a gripping surface 20.
La seconde électrode 32, par exemple en graphite est partiellement immergée dans le liquide diélectrique 28 au droit de la première électrode 30 et du bec 18. The second electrode 32, for example made of graphite, is partially immersed in the dielectric liquid 28 in line with the first electrode 30 and the spout 18.
La seconde électrode 32 est écartée du bec 18 d'une distance adaptée que l'homme du métier saura déterminer selon les cas. The second electrode 32 is spaced from the spout 18 by a suitable distance that the skilled person will be able to determine as appropriate.
Dans l'exemple décrit, la tension aux bornes des électrodes 30,32 est d'environ 60 V et l'intensité dans le circuit 33 est d'environ 18 A. La surface de préhension 20 électro-érodée est formée en maintenant le courant dans le circuit 33 pendant environ 1 à 2 mn. In the example described, the voltage at the terminals of the electrodes 30.32 is approximately 60 V and the intensity in the circuit 33 is approximately 18 A. The electro-eroded gripping surface 20 is formed by maintaining the current in circuit 33 for approximately 1 to 2 min.
Après formation des surfaces de préhension 20 sur chacune des branches 12, ces dernières sont reliées entre elles pour former une pince telle que représentée sur la figure 1. After the gripping surfaces 20 have been formed on each of the branches 12, the latter are connected together to form a clamp as shown in FIG. 1.
Les branches sont éventuellement revêtues de chrome ou d'un alliage de chrome après électro-érosion. The branches are optionally coated with chromium or a chromium alloy after EDM.
L'électro-érosion permet d'obtenir des surfaces de préhension rugueuses ne présentant pas de zones de fragilisation des becs 18 de la pince. Electro-erosion makes it possible to obtain rough gripping surfaces that do not have zones of embrittlement of the beaks 18 of the pliers.
La rugosité des surfaces de préhension peut être contrôlée en réglant les différents paramètres de l'installation 24, notamment l'intensité du courant et le temps d'application de ce courant. The roughness of the gripping surfaces can be controlled by adjusting the various parameters of the installation 24, in particular the intensity of the current and the time of application of this current.
L'invention ne se limite pas au mode de réalisation décrit précédemment. The invention is not limited to the embodiment described above.
En particulier, les branches de la pince ne sont pas nécessairement articulées entre elles au moyen d'une broche 14. Elles peuvent être tout simplement reliées entre elles par soudage de leurs extrémités proximales comme dans le cas des pinces appelées "brucelles". In particular, the branches of the clamp are not necessarily articulated with one another by means of a pin 14. They can be simply connected to each other by welding their proximal ends as in the case of clamps called "tweezers".
Ainsi, l'invention peut s'appliquer à toute pince comportant deux branches reliées entre elles. Thus, the invention can be applied to any clamp comprising two branches connected to each other.
L'invention comporte de nombreux avantages. The invention has many advantages.
En particulier, les surfaces de préhension formées par électro-érosion permettent d'obtenir un effort de préhension équivalent à celui obtenu par des surfaces de préhension classiques constituées de dentures, ceci sans risque de fragilisation des becs de la pince, même lorsque ceux-ci sont longs et effilés. In particular, the gripping surfaces formed by electro-erosion make it possible to obtain a gripping force equivalent to that obtained by conventional gripping surfaces made up of teeth, this without risk of weakening the tongs of the forceps, even when these are long and slender.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9603355A FR2746049B1 (en) | 1996-03-18 | 1996-03-18 | CLAMP AND METHOD FOR MANUFACTURING THE CLAMP |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9603355A FR2746049B1 (en) | 1996-03-18 | 1996-03-18 | CLAMP AND METHOD FOR MANUFACTURING THE CLAMP |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2746049A1 true FR2746049A1 (en) | 1997-09-19 |
| FR2746049B1 FR2746049B1 (en) | 1998-04-17 |
Family
ID=9490274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9603355A Expired - Fee Related FR2746049B1 (en) | 1996-03-18 | 1996-03-18 | CLAMP AND METHOD FOR MANUFACTURING THE CLAMP |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2746049B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009087174A1 (en) * | 2008-01-09 | 2009-07-16 | Knipex-Werk C. Gustav Putsch Kg | Pliers as middle cutter or side cutter |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2372676A1 (en) * | 1976-12-06 | 1978-06-30 | Brunon Louis | Hard surface finish for hammer head - has series of projecting irregular nodules formed by electroerosion or spark-discharge |
| WO1987005483A1 (en) * | 1986-03-13 | 1987-09-24 | Micrins Surgical Instruments, Ltd. | Hand held surgical tool |
| US4761028A (en) * | 1987-05-11 | 1988-08-02 | Andrew Tool Company | Single-piece tweezers |
| US5036733A (en) * | 1988-04-12 | 1991-08-06 | Tiholiz Ivan C | Co-aptive instruments with non-slip surfaces and method for their manufacture |
| NL9200491A (en) * | 1992-03-16 | 1993-10-18 | Dutch Ophthalmic Res Ct Int Bv | Method for producing a pair of tweezers, and tweezers produced in this way |
| US5257558A (en) * | 1992-11-17 | 1993-11-02 | Ormco Corporation | Medical/dental pliers |
-
1996
- 1996-03-18 FR FR9603355A patent/FR2746049B1/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2372676A1 (en) * | 1976-12-06 | 1978-06-30 | Brunon Louis | Hard surface finish for hammer head - has series of projecting irregular nodules formed by electroerosion or spark-discharge |
| WO1987005483A1 (en) * | 1986-03-13 | 1987-09-24 | Micrins Surgical Instruments, Ltd. | Hand held surgical tool |
| US4761028A (en) * | 1987-05-11 | 1988-08-02 | Andrew Tool Company | Single-piece tweezers |
| US5036733A (en) * | 1988-04-12 | 1991-08-06 | Tiholiz Ivan C | Co-aptive instruments with non-slip surfaces and method for their manufacture |
| NL9200491A (en) * | 1992-03-16 | 1993-10-18 | Dutch Ophthalmic Res Ct Int Bv | Method for producing a pair of tweezers, and tweezers produced in this way |
| US5257558A (en) * | 1992-11-17 | 1993-11-02 | Ormco Corporation | Medical/dental pliers |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009087174A1 (en) * | 2008-01-09 | 2009-07-16 | Knipex-Werk C. Gustav Putsch Kg | Pliers as middle cutter or side cutter |
| US8479399B2 (en) | 2008-01-09 | 2013-07-09 | Knipex-Werk C. Gustav Putsch Kg | Pliers as middle cutter or side cutter |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2746049B1 (en) | 1998-04-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |