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(11) | EP 0 315 281 B1 |
| (12) | EUROPEAN PATENT SPECIFICATION |
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| (54) |
A device for working on work-pieces by means of pressure Vorrichtung zur Werkstückbearbeitung durch Druckmittel Appareil de déformation de pièces de travail au moyen de pression |
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| Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention). |
[0001] The invention is related to an apparatus as for example known from EP-A-0 088 152 for manufacturing work pieces using pressure, such as bending, punching etc, said apparatus comprising principally a fixing surface and a carrier with respect to the table, for a thereon affixed pressure device such as a hydraulic cylinder.
[0002] An apparatus of the type described in the preamble is usually used for a single pressure stroke, for example the punching of work pieces, where the direction of the stroke is not suitable for pipe bending. The invention aims at providing a similar apparatus which is universal but nevertheless constructionally simple.
[0003] Thereto the invention provides an apparatus wherein the carrier is adapted to an axis parallel to the table, crossing the pressure axis of the pressure device.
[0004] Thanks to the pivoting, the pressure device can be brought under any desired angle regarding the table. Especially in the first position wherein the pressure line falls vertically on the table, and in the second position wherein it runs parallel thereto.
[0005] Other features and advantages of the invention will be evident from the detailed description of an embodiment herebelow.
[0006] In the drawing is:
Fig. 1: A plan view in perspective of the apparatus according to the invention wherein the pressure axis of the pressure device is vertical to the table.
Fig. 2: A similar perspective plan view to fig. 1 whereby the pressure axis of the pressure device runs parallel to the table.
[0007] In the figures a support table is indicated with the number 1, which can be mounted on any frame in any way desired.
[0008] The surface of the table 1 serves as a fixing surface 2, for the work piece to be machined. An example of which will be illustrated later hereunder.
[0009] A pivoting support 3 in the shape of a U shaped yoke straddles the table 1, so that the vertical cheeks or arms 4, of the yoke 3, are situated on either side of the table 1.
[0010] The free end of each arm posesses two through holes, 5, 6, through which a pivot pin 7 extends into the side of the table 1, and a locking pin 8 respectively. The two pivot pins 7 on both sides of the table form a hinge or pivot line A-A which runs parallel to the fixing surface 2 of the table 1. In the indicated construction the line A-A runs at a determined distance below the fixing surface 2, which distance is equal to the distance D between the front edge of the pivot arm 4, and the pivot line A-A. In the indicated construction each arm is also S or Z shape constructed, such that the body 9 of the yoke 3 springs out above the fixing table 1 with regard to the axis A-A.
[0011] This body plate 9 carries a pressure unit 10, in the form of a hydraulic cylinder which is operated via a pressure source 11, and a two way valve 12. The cylinder ram 13 moves up and down on a line B-B in figure 1.
[0012] According to a feature of the invention the pressure line B-B crosses the pressure line A-A, whereby the distance between these two lines is at least equal to distance D.
[0014] This gives the advantage that the workpiece W on the fixing table can project on both sides of the table beyond the arms 4, whereby a movement of the workpiece is possible in the direction P1.
[0015] If the ram 13 of the cylinder 10 is fitted with a punch tool, and the fixing surface of 2 of the fixing table 1 is fitted with an anvil, then a punch unit is created very simply with the arrangement shown in fig. 1.
[0016] It will be noticed that the punch tool can be simply and easily fastened to the fixing table 2 using dowels 15 and the pre-drilled holes 16 in the table.
[0018] In the shown position of the apparatus the ram 13 of the cylinder 10 can naturally be fitted at will with any pressure tool for the thereon appropriate position.
[0019] Fig. 2 shows the apparatus in fig. 1 in an other position whereby the yoke 3 is pivoted counter clockwise following the arrow P2. This pivoting can be achieved by removing the locking pin 8 from the hole 6, lowering the yoke thereafter, and replacing locking pin 6 in the arm 4 in a second hole 17, in the side of the table 1.
[0020] In this position the cylinder 10 with ram 13 lies in such a way, that the pressure line B-B runs parallel to the fixing surface 2 of the table 1. Seeing that the distance between the pivot line A-A and the fixing surface of the table 1 is equal to distance D, the front of arm 4 lies level with or under the fixing surface of the table 1, so that the workpiece can project beyond the yoke arms 4.
[0021] This is indicated by a tubular workpiece W that is supported by two blocks 19, mounted at a distance from each other.
[0022] The ram 13 can push against the side of the workpiece W along a line B-B, whereby a bending action takes place.
1. An apparatus for the manufacturing of workpieces using pressure, such as bending,
punching etc, said apparatus comprising principally a fixing surface (2), a carrier
(3) having a pressure unit (10) fitted thereon such as a hydraulic cylinder, and adjustable
in relation to the fixing surface (2), characterized in that the carrier (3) is adapted
to be pivoted about an axis (A-A), parallel to the fixing surface (2) and crossing
the pressure axis (B-B) of the pressure unit (10).
2. An apparatus according to claim 1, characterized in that the carrier (3) is provided
with one or two pivot arms (4), the side edge thereof nearest to the pressure axis
(B-B) is located at a certain distance from the pivot axis (A-A), said pivot axis
(A-A) extending for a least one half of said distance underneath the table surface.
3. An apparatus according to claim 1 or 2 characterized in that the distance between
the offset crossing pressure and pivot axes (A-A) is at least equal to half said distance.
1. Machine permettant de fabriquer des pièces en utilisant une pression, par exemple,
par cintrage, poinçonnage etc., ladite machine comprenant principalement une surface
de fixation (2), un support (3) sur lequel est montée une unité de pression (10) telle
qu'un vérin hydraulique, et qui est réglable en position relative par rapport à la
surface de fixation (2), caractérisée en ce que le support (3) est adapté pour pivoter
autour d'un axe (A-A) parallèle à la surface de fixation (2) et qui croise l'axe de
pression (B-B) de l'unité de pression (10).
2. Machine selon la revendication 1, caractérisée en ce que le support 53) est muni d'un
ou de deux bras pivotants (4), dont le côté le plus proche de l'axe de pression (B-B)
est placé à une certaine distance de l'axe de pivotement (A-A), ledit axe de pivotement
(A-A) s'étendant en un point placé à un écartement au-dessous de la surface de la
table qui est égal à au moins la moitié de cette certaine distance.
3. Machine selon la revendication 1 ou 2, caractérisée en ce que la distance entre les
axes croisés et décalés, de pression et de pivotement (A-A), est au moins égale à
la moitié de ladite certaine distance.
1. Vorrichtung zur Herstellung von Werkstücken mittels Druck, wie Biegen, Stanzen und
dergleichen, wobei diese Vorrichtung eine im wesentlichen feststehende Fläche (2)
aufweist, weiterhin einen Träger (3), in dem eine Druckeinrichtung (10), wie ein Hydraulikzylinder,
eingebaut und bezüglich der feststehenden Fläche (2) einstellbar ist, dadurch gekennzeichnet,
dass der Träger (3) um eine parallel zur feststehenden Fläche (2) verlaufende Achse
(A-A) schwenkbar ist, die die Druckachse (B-B) der Druckeinrichtung (10) kreuzt.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Träger (3) mit einem
oder zwei Schwenkarmen (4) versehen ist, deren der Druckachse (B-B) am nächsten liegender
Seitenrand in einem bestimmten Abstand zur Schwenkachse (A-A) liegt, und dass diese
Schwenkachse (A-A) um zumindest die Hälfte dieses Abstandes unterhalb der Tischfläche
liegt.
3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Abstand zwischen
den sich versetzt kreuzenden Druck- und Schwenkachsen (A-A) zumindest gleich ist der
Hälfte dieses Abstandes.