WO1988001923A1 - Clamping device for workpieces - Google Patents
Clamping device for workpieces Download PDFInfo
- Publication number
- WO1988001923A1 WO1988001923A1 PCT/CH1987/000115 CH8700115W WO8801923A1 WO 1988001923 A1 WO1988001923 A1 WO 1988001923A1 CH 8700115 W CH8700115 W CH 8700115W WO 8801923 A1 WO8801923 A1 WO 8801923A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- plane
- workpiece
- clamping device
- workpieces
- clamping
- 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.)
- Ceased
Links
Classifications
-
- 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
- B25B1/00—Vices
- B25B1/06—Arrangements for positively actuating jaws
- B25B1/10—Arrangements for positively actuating jaws using screws
-
- 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
- B23H11/00—Auxiliary apparatus or details, not otherwise provided for
- B23H11/003—Mounting of workpieces, e.g. working-tables
-
- 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
- B25B1/00—Vices
- B25B1/06—Arrangements for positively actuating jaws
- B25B1/10—Arrangements for positively actuating jaws using screws
- B25B1/12—Arrangements for positively actuating jaws using screws with provision for disengagement
Definitions
- the invention relates to a clamping device for workpieces according to the preamble of patent claim 1.
- Such a jig is e.g. known from CH-A-623771.
- a vice is described with a bed (1) with a fixed jaw (2, 3) at each end of the bed (Fig. 1).
- a clamping jaw (4) movable along the bed (1), which is simultaneously pulled down against the bed (1) by means of an inclined spindle (9, 10) and against a workpiece or one of the fixed clamping jaws (2, 3) can be pressed.
- the spindle can be released from a toothing (16) on the bed (1) and pivoted in two oppositely inclined positions in order to counter the movable clamping jaw (4) at any point in opposite directions to be able to press a workpiece.
- the above-mentioned clamping device has the disadvantage, among other things, that the spindle (9, 10) will be tightened on the workpiece level. As a result, only a very limited displacement of the movable jaw (4) is possible. For workpieces of different widths, it is therefore often necessary to release them from the toothing (16). In addition, with the vice described it is hardly possible to clamp several different workpieces.
- the object of the invention is to ensure in a clamping device of the aforementioned type that several workpieces of different sizes can be clamped quickly and precisely.
- the advantages of the invention include that several workpieces of different sizes - in particular for tool making on wire EDM machines - can be clamped simultaneously and at precisely defined locations. Now the clamping force the workpiece is determined by the inclination of the chuck body to the latching plane, even wider workpieces can be clamped without problems. Since the clamping body is tightened on the snap-in level, it is possible - in contrast to the known solution - to clamp and unclamp the workpieces individually. Further advantages follow from the description below. There, the invention is explained in more detail using an example shown in the drawing. It shows:
- Fig. 1 is a top view of a jig
- FIG. 2 shows a cross section along the line A-A in FIG. 1
- the locking plane 2 consists of semicircular grooves that are equally spaced apart.
- the workpiece plane 3 is a flat surface on which cuboid depressions are made at fixed intervals. Stops 4 are fastened in these recesses by means of a screw 5 (partial cutout). The stops 4 are cuboids, the edges of which are as flat as possible.
- a clamping body 6 Between the locking level 2 and the workpiece level 3 there is a clamping body 6, at one end of which a semi-cylindrical locking part 7 is screwed by an Allen screw 8. At the other end of the clamping body 6, a rotatable cam 9 is provided, which is mounted by means of a pin 10.
- the cam 9 could also be connected to the clamping body 6 by means of a ball joint.
- a cuboid workpiece is clamped between the cam 10 and one of the stops 4.
- the clamping block 1 has a rectangular depression along the left underside.
- the clamping block 1 is thus mounted on a fastening strip 12 which has fastening holes 13 at precisely defined locations for mounting the clamping device on e.g. a wire EDM machine.
- FIG. 2 shows the clamping device according to the cross section AA in FIG. 1.
- the clamping block 1 has a slot in which the clamping body 6 is located. : he mounting bar 12 is screwed to the clamping block 1 with a screw 14.
- a support plate 15 is screwed onto the right underside of the clamping block 1 with a screw 16 and protrudes a little so that the workpiece 11 is flush with the underside of the clamping block 1.
- the upper left side of the clamping block 1 is provided with an alignment edge 17, a rectangular depression in the longitudinal direction. This edge 17 is completely flat and runs exactly parallel to the workpiece plane 3.
- the workpiece 11 is clamped by the stops 4, which are arranged one above the other, and by the cam 9.
- the stops 4 and the cam 9 form a kind of triangle.
- the edges of the stops 4 towards the workpiece 11 and the workpiece plane 3 are flat, and the angle between these edges is exactly 90 °.
- the edges of the cuboid workpiece 11 are also flat towards the stops 4 and the workpiece plane 3, and form a right angle. Because the stops 4 are precisely defined
- the starting point or zero point is known exactly.
- the stops 4 arranged in pairs one above the other are screwed on at precisely defined intervals, so that the starting or zero points for further workpieces (not shown) are also known.
- Such a clamping device has proven particularly useful for tool making on wire EDM machines, it advantageously consisting of a rustproof metal.
- an edge finder With an edge finder, a cuboid similar to the tool 11 shown, which has a bore whose coordinates to the corner are known exactly, the zero point for the eroding wire is determined precisely.
- several programs for the workpieces can be entered one after the other, and the workpieces can be produced successively automatically. The workpieces can be loaded outside the machine.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
Description
Einspannvorrichtung für Werkstücke Clamping device for workpieces
Die Erfindung betrifft eine Einspannvorrichtung für Werkstücke nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a clamping device for workpieces according to the preamble of patent claim 1.
Eine solche Einspannvorrichtung ist z.B. bekannt aus CH-A-623771. Dort wird ein Schraubstock beschrieben mit einem Bett (1) mit je einer festen Spannbacke (2, 3) an jedem Bettende (Fig. 1). Dazwischen ist eine längs des Bettes (1) bewegliche Spannbacke (4) angeordnet, die mittels einer geneigten Spindel (9, 10) zugleich gegen das Bett (1) niedergezogen und gegen ein Werkstück, bzw. einer der festen Spannbacken (2, 3) gepresst werden kann. Die Spindel kann zur Grobverstellung der beweglichen Spannbacke (4) aus einer Verzahnung (16) am Bett (1) gelöst und in zwei entgegenge- setzt geneigten Lagen verschwenkt werden, um die bewegliche Spann¬ backe (4) an beliebiger Stelle in entgegengesetzten Richtungen gegen ein Werkstück anpressen zu können.Such a jig is e.g. known from CH-A-623771. There a vice is described with a bed (1) with a fixed jaw (2, 3) at each end of the bed (Fig. 1). In between there is a clamping jaw (4) movable along the bed (1), which is simultaneously pulled down against the bed (1) by means of an inclined spindle (9, 10) and against a workpiece or one of the fixed clamping jaws (2, 3) can be pressed. For rough adjustment of the movable clamping jaw (4), the spindle can be released from a toothing (16) on the bed (1) and pivoted in two oppositely inclined positions in order to counter the movable clamping jaw (4) at any point in opposite directions to be able to press a workpiece.
Die oben genannte Einspannvorrichtung hat unter anderem den Nachteil, dass der Spindel (9, 10) auf der Werkstückebene angezogen werden wird. Dadurch ist nur eine sehr beschränkte Verschiebung des beweglichen Spannbackens (4) möglich. Bei Werkstücken verschiedener Breite muss deshalb öfters aus der Verzahnung (16) ausgeklinkt werden. Zudem ist es mit dem beschriebenen Schraubstock kaum möglich, mehrere verschiedene Werkstücke einzuspannen.The above-mentioned clamping device has the disadvantage, among other things, that the spindle (9, 10) will be tightened on the workpiece level. As a result, only a very limited displacement of the movable jaw (4) is possible. For workpieces of different widths, it is therefore often necessary to release them from the toothing (16). In addition, with the vice described it is hardly possible to clamp several different workpieces.
Die Erfindung stellt sich nun die Aufgabe, bei einer Einspannvor¬ richtung der vorgenannten Art zu gewährleisten, dass mehrere Werkstücke verschiedener Grosse schnell und präzise eingespannt werden können.The object of the invention is to ensure in a clamping device of the aforementioned type that several workpieces of different sizes can be clamped quickly and precisely.
Diese Aufgabe wird erfindungsgemäss gelöst durch die Merkmale des Patentanspruches 1.This object is achieved according to the invention by the features of patent claim 1.
Die Vorteile der Erfindung sind unter anderem, dass mehrere Werk¬ stücke verschiedener Grosse - insbesondere für den Werkzeugbau auf Drahterodiermaschinen - gleichzeitig und an genau definierten Orten eingespannt werden können. Da nunmehr die Einspannkraft auf das Werkstück bestimπt wird durch die Neigung des Einspann¬ körpers zur Einrastebene, sind auch breitere Werkstücke unproblema¬ tisch einzuspannen. Da der Einspannkörper auf der Einrastebene angezogen wird, ist es - im Gegensatz zu der bekannten Lösung -möglich, die Werkstücke einzeln ein- und auszuspannen. Weitere Vorteile folgen aus der nachfolgenden Beschreibung. Dort wird die Erfindung anhand eines in der Zeichnung dargestellten Beispieles näher erläutert. Dabei zeigt:The advantages of the invention include that several workpieces of different sizes - in particular for tool making on wire EDM machines - can be clamped simultaneously and at precisely defined locations. Now the clamping force the workpiece is determined by the inclination of the chuck body to the latching plane, even wider workpieces can be clamped without problems. Since the clamping body is tightened on the snap-in level, it is possible - in contrast to the known solution - to clamp and unclamp the workpieces individually. Further advantages follow from the description below. There, the invention is explained in more detail using an example shown in the drawing. It shows:
Fig. 1 eine Obenansicht einer Einspannvorrichtung, undFig. 1 is a top view of a jig, and
Fig. 2 einen Querschnitt gemäss der Linie A-A in Fig. 1FIG. 2 shows a cross section along the line A-A in FIG. 1
In Fig. 1 ist ein Einspannblock 1 mit einer Einrastebene 2 und einer Werkstückebene 3 gezeigt. Die Einrastebene 2 besteht aus halbkreisförmigen Nuten, die gleich ässig beabstandet sind. Die Werkstückebene 3 ist eine plane Fläche, auf der in festen Abständen quaderförmige Vertiefungen angebracht sind. In diesen Vertiefungen sind Anschläge 4 mittels einer Schraube 5 (Teilausschnitt) befestigt. Die Anschläge 4 sind Quader, dessen Kanten möglichst plan sind. Zwischen der Einrastebene 2 und der Werkstückebene 3 befindet sich ein Einspannkörper 6, an dessen eine Ende ein halbzylinder- förmiger Einrastteil 7 von einer Inbusschraube 8 angeschraubt ist. Am anderen Ende des Einspannkörpers 6 ist ein drehbarer Nocken 9 vorgesehen, der mittels eines Stiftes 10 gelagert ist. Der Nocken 9 könnte auch mittels eines Kugelgelenkes mit dem Einspannkörper 6 verbunden sein. Zwischen dem Nocken 10 und einem der Anschläge 4 ist ein quaderförmiges Werkstück eingespannt. Der Einspannblock 1 hat längs der linken Unterseite eine rechteckige Vertiefung. Damit ist der Einspannblock 1 auf einer Befestigungs¬ leiste 12 angebracht, die an genau definierten Plätzen Befestigungs- löcher 13 besitzt für die Montage der Einspannvorrichtung auf z.B. eine Drahterodiermaschine.1 shows a clamping block 1 with a latching plane 2 and a workpiece plane 3. The locking plane 2 consists of semicircular grooves that are equally spaced apart. The workpiece plane 3 is a flat surface on which cuboid depressions are made at fixed intervals. Stops 4 are fastened in these recesses by means of a screw 5 (partial cutout). The stops 4 are cuboids, the edges of which are as flat as possible. Between the locking level 2 and the workpiece level 3 there is a clamping body 6, at one end of which a semi-cylindrical locking part 7 is screwed by an Allen screw 8. At the other end of the clamping body 6, a rotatable cam 9 is provided, which is mounted by means of a pin 10. The cam 9 could also be connected to the clamping body 6 by means of a ball joint. A cuboid workpiece is clamped between the cam 10 and one of the stops 4. The clamping block 1 has a rectangular depression along the left underside. The clamping block 1 is thus mounted on a fastening strip 12 which has fastening holes 13 at precisely defined locations for mounting the clamping device on e.g. a wire EDM machine.
In Fig. 2 ist die Einspannvorrichtung gemäss dem Querschnitt A-A in Fig. 1 dargestellt. Es wurden dieselben Bezugszeichen für dieselben Elemente wie in Fig. 1 verwendet. Wie aus dieser Figur ersichtlich, besitzt der Einspannblock 1 einen Schlitz, in dem sich der Einspannkörper 6 befindet. :ie Befestigungsleiste 12 ist mit einer Schraube 14 an dem Einspannblock 1 angeschraubt. Eine Auflageplatte 15 ist auf der rechten Unterseite des Einspann¬ blocks 1 mit einer Schraube 16 angeschraubt, und steht ein wenig vor, so dass das Werkstück 11 bündig mit der Unterseite des Ein- spannblockes 1 ist. Die linke Oberseite des Einspannblockes 1 ist mit einer Ausrichtkante 17, einer rechteckigen Vertiefung in Längsrichtung, versehen. Diese Kante 17 ist völlig plan und verläuft genau parallel zur Werkstückebene 3.FIG. 2 shows the clamping device according to the cross section AA in FIG. 1. The same reference numerals have been used for the same elements as in FIG. 1. As can be seen from this figure, the clamping block 1 has a slot in which the clamping body 6 is located. : he mounting bar 12 is screwed to the clamping block 1 with a screw 14. A support plate 15 is screwed onto the right underside of the clamping block 1 with a screw 16 and protrudes a little so that the workpiece 11 is flush with the underside of the clamping block 1. The upper left side of the clamping block 1 is provided with an alignment edge 17, a rectangular depression in the longitudinal direction. This edge 17 is completely flat and runs exactly parallel to the workpiece plane 3.
Die Wirkungsweise der obigen Einspannvorrichtung ist nun wie folgt:The operation of the above clamping device is now as follows:
Das Werkstück 11 wird von den Anschlägen 4, die übereinander angeordnet sind, und von dem Nocken 9 eingespannt. Die Anschläge 4 und der Nocken 9 bilden dabei eine Art Dreieck. Die Kanten der Anschläge 4 zum Werkstück 11 und zur Werkstückebene 3 hin sind plan, und der Winkel zwischen diesen Kanten ist genau 90°. Die Kanten des quaderförmigen Werkstückes 11 sind zu den Anschlägen 4 und zur Werkstückebene 3 hin ebenfalls plan, und bilden einen rechten Winkel. Da sich die Anschläge 4 an genau definiertenThe workpiece 11 is clamped by the stops 4, which are arranged one above the other, and by the cam 9. The stops 4 and the cam 9 form a kind of triangle. The edges of the stops 4 towards the workpiece 11 and the workpiece plane 3 are flat, and the angle between these edges is exactly 90 °. The edges of the cuboid workpiece 11 are also flat towards the stops 4 and the workpiece plane 3, and form a right angle. Because the stops 4 are precisely defined
Plätzen befinden, ist der Anfangspunkt oder Nullpunkt genau bekannt. Die paarweise übereinander angeordneten Anschläge 4 sind auf genau definierten Abständen angeschraubt, so dass auch die Anfangs¬ oder Nullpunkte für weitere (nicht dargestellte) Werkstücke bekannt sind. Eine solche Einspannvorrichtung hat sich besonders bewährt für den Werkzeugbau auf Drahterodiermaschinen, wobei sie vorteil¬ hafterweise aus einem rostfreien Metall besteht. Mit einem Kanten¬ sucher, einem Quader ähnlich wie das gezeigte Werkzeug 11, der eine Bohrung besitzt, deren Koordinaten zur Ecke genau bekannt sind, wird der Nullpunkt für den Erodierdraht genaustens bestimmt. Dadurch können mehrere Programme für die Werkstücke nacheinander eingegeben werden, und die Werkstücke sukzessive automatisch hergestellt werden. Die Bestückung der Werkstücke kann ausserhalb der Maschine stattfinden. Es können mehrere Werkstücke eingespannt werden, so dass der Abschnitt bei der Herstellung mehrerer Werk¬ stücke geringer ist, als bei der herkömmlichen Art, wo nur ein Werkstück eingespannt werden kann. Im letzten Fall muss zudem für die Herstellung mehrerer Werkzeuge eine genaue Positionszeichnung erstellt werden. Da die Werkstückgrösse nunmehr kleiner und der Anfangspunkt der Herstellung genauestens bekannt ist, sind nicht mehr unbedingt ESU-Stähle für den Werkzeugbau auf Drahterodier- maschinen benötigt. Mit einer (nicht dargestellten) Messuhr längs der Ausrichtkante 17 kann problemlos und schnell eine Genauigkeit von +/- 3 um des hergestellten Werkzeuges eingehalten werden. Die Befestigungslöcher (Längs- und Querbohrungen) für das Werkzeug können vor dem Erodieren im weichen Werkstück gebohrt werden. Das Werkstück wird dann gehärtet und anschliessend erodiert. Auf diese Art können nicht nur Stempel sondern auch Matrizen hergestellt werden, bei denen die Aussenform schon fertig ist. Es versteht sich, dass die erfindungsgemässe Einspannvorrichtung auch für Senkerodiermaschinen besonders geeignet ist. Places, the starting point or zero point is known exactly. The stops 4 arranged in pairs one above the other are screwed on at precisely defined intervals, so that the starting or zero points for further workpieces (not shown) are also known. Such a clamping device has proven particularly useful for tool making on wire EDM machines, it advantageously consisting of a rustproof metal. With an edge finder, a cuboid similar to the tool 11 shown, which has a bore whose coordinates to the corner are known exactly, the zero point for the eroding wire is determined precisely. As a result, several programs for the workpieces can be entered one after the other, and the workpieces can be produced successively automatically. The workpieces can be loaded outside the machine. Several workpieces can be clamped, so that the section when producing several workpieces is smaller than in the conventional type, where only one workpiece can be clamped. In the latter case, it must also an exact position drawing is created for the production of several tools. Since the workpiece size is now smaller and the starting point of production is known exactly, ESR steels are no longer absolutely necessary for toolmaking on wire EDM machines. With a dial gauge (not shown) along the alignment edge 17, an accuracy of +/- 3 µm of the tool produced can be maintained quickly and easily. The mounting holes (longitudinal and transverse holes) for the tool can be drilled in the soft workpiece before eroding. The workpiece is then hardened and then eroded. In this way, not only stamps but also matrices can be produced, in which the outer shape is already finished. It goes without saying that the clamping device according to the invention is also particularly suitable for die-sinking EDM machines.
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH3670/86-8 | 1986-09-12 | ||
| CH367086 | 1986-09-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1988001923A1 true WO1988001923A1 (en) | 1988-03-24 |
Family
ID=4260985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CH1987/000115 Ceased WO1988001923A1 (en) | 1986-09-12 | 1987-09-09 | Clamping device for workpieces |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0290479A1 (en) |
| AU (1) | AU7870487A (en) |
| WO (1) | WO1988001923A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU619306B2 (en) * | 1988-06-24 | 1992-01-23 | Arthur William Thomas Crotty | Concrete products |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR341243A (en) * | 1904-03-14 | 1904-08-02 | Hermann Schoening | horizontal vice |
| CH272038A (en) * | 1949-04-09 | 1950-11-30 | Schmidt Leonhard | Parallel vice. |
| US2992665A (en) * | 1959-06-08 | 1961-07-18 | Mertz David | Vise |
| FR2371268A1 (en) * | 1976-11-22 | 1978-06-16 | Apparate & Werkzeugbau Ag | VICE |
| US4243213A (en) * | 1979-01-18 | 1981-01-06 | Georgian Michael T | Adjustable precision grinding and machinist vise |
| EP0050194A1 (en) * | 1980-10-21 | 1982-04-28 | Fribosa Ag | Clamp |
| DE8605155U1 (en) * | 1986-02-26 | 1986-04-17 | Gärtner, Erwin, 8531 Lenkersheim | Device for holding and fixing workpieces for their processing on the clamping frames of EDM machines, such as wire EDM machines, etc. |
| WO1986006014A1 (en) * | 1985-04-12 | 1986-10-23 | Jung Woong Choi | Electrode holder for electric discharge processing machines |
-
1987
- 1987-09-09 EP EP19870905584 patent/EP0290479A1/en not_active Withdrawn
- 1987-09-09 AU AU78704/87A patent/AU7870487A/en not_active Abandoned
- 1987-09-09 WO PCT/CH1987/000115 patent/WO1988001923A1/en not_active Ceased
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR341243A (en) * | 1904-03-14 | 1904-08-02 | Hermann Schoening | horizontal vice |
| CH272038A (en) * | 1949-04-09 | 1950-11-30 | Schmidt Leonhard | Parallel vice. |
| US2992665A (en) * | 1959-06-08 | 1961-07-18 | Mertz David | Vise |
| FR2371268A1 (en) * | 1976-11-22 | 1978-06-16 | Apparate & Werkzeugbau Ag | VICE |
| US4243213A (en) * | 1979-01-18 | 1981-01-06 | Georgian Michael T | Adjustable precision grinding and machinist vise |
| EP0050194A1 (en) * | 1980-10-21 | 1982-04-28 | Fribosa Ag | Clamp |
| WO1986006014A1 (en) * | 1985-04-12 | 1986-10-23 | Jung Woong Choi | Electrode holder for electric discharge processing machines |
| DE8605155U1 (en) * | 1986-02-26 | 1986-04-17 | Gärtner, Erwin, 8531 Lenkersheim | Device for holding and fixing workpieces for their processing on the clamping frames of EDM machines, such as wire EDM machines, etc. |
Also Published As
| Publication number | Publication date |
|---|---|
| AU7870487A (en) | 1988-04-07 |
| EP0290479A1 (en) | 1988-11-17 |
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