DE3238197C1

DE3238197C1 - Automatically controlled portal milling machine

Info

Publication number: DE3238197C1
Application number: DE19823238197
Authority: DE
Inventors: Otto 8630 Coburg Waldrich
Original assignee: Waldrich Siegen Werkzeugmaschinenfabrik GmbH
Current assignee: Waldrich Siegen Werkzeugmaschinenfabrik GmbH
Priority date: 1982-10-15
Filing date: 1982-10-15
Publication date: 1984-05-24

Abstract

NC-controlled portal milling machine with a stationary portal (1), a cross beam (2) arranged on the front side (1a) of the portal (1), a milling head (3) transversely displaceable on this cross beam (2), and a milling carriage (4) vertically displaceable on the milling head (3) along a vertical centre axis (M1), as well as a machine bed (7) which is passed through the portal (1) and on which a machine table (8) can be displaced at right angles to the cross beam (2) by means of a drive device (9-12). Arranged on the rear side (1b) of the portal (1) is a second, stationary portal (1') of the same type, the cross beam (2'), milling head (3') and milling carriage (4') of which are provided on the side (1'a) of the second portal (1') remote from the first portal (1). The distance (a) between the vertical centre axes (M1, M2) of the milling carriages (4, 4') is roughly as large as or larger than the length (L) of the machine table (8). The machine bed (1) is also passed through the second portal (1'), and a second machine table (8') provided with a separate drive device (9'-12') is displaceably arranged on this common machine bed (7).

Description

Die Portalfräsmaschine weist ein erstes, stationäres Portal 1 auf, an dessen Vorderseite la ein Querbalken 2 in Richtung W höhenbeweglich angeordnet ist. Der Querbalken 2 trägt einen horizontal in Richtung Yverschiebbaren Frässupport 3. An diesem Frässupport 3 ist The portal milling machine has a first, stationary portal 1, on the front side la a cross bar 2 is arranged vertically movable in the direction W. is. The crossbeam 2 carries a milling support that can be displaced horizontally in the Y direction 3. There is 3 on this milling support

ein Frässchlitten 4 in Richtung Z vertikal verschiebbar gelagert. Der Frässchlitten 4 weist eine vertikale Mittelachse M1 auf. An seinem unteren Ende kann ein Universalfräskopf 5 angeordnet sein, der um die Mittelachse M1 in Richtung C und ferner um eine horizontale Achse B schwenkbar ist. Dieser Universal-Fräskopf 5 trägt den Fräser 6.a milling slide 4 mounted so as to be vertically displaceable in the Z direction. The milling carriage 4 has a vertical central axis M1. At its lower end A universal milling head 5 can be arranged around the central axis M1 in the direction C and is also pivotable about a horizontal axis B. This universal milling head 5 carries the cutter 6.

Auf einem Maschinenbett 7, welches durch das Portal 1 hindurchgeführt ist, ist ein Maschinentisch 8 mittels einer Antriebsvorrichtung 9 - 12 senkrecht zum Querbalken 3 verschiebbar. Die Antriebsvorrichtung kann aus einem Antriebsmotor 9, einem Getriebe 10 und einer Spindel 11 bestehen, welche mit einer am Maschinentisch 8 angeordneten Mutter 12 zusammenwirkt. On a machine bed 7, which is passed through the portal 1 is, a machine table 8 is vertical by means of a drive device 9-12 can be moved to crossbar 3. The drive device can consist of a drive motor 9, a gear 10 and a spindle 11, which are connected to a machine table 8 arranged nut 12 cooperates.

In Abstand von der Rückseite 1 b des Portals 1 ist ein zweites gleichartiges Portal 1' angeordnet. Der Querbalken 2', der Frässupport 3' und Frässchlitten 4' sind dabei auf der dem ersten Portal 1' abgewandten Seite 1'a des zweiten Portals 1' angeordnet. Die vertikale Mittelachse des Frässchlittens 4' ist mit M 2 bezeichnet. Das Maschinenbett 7 ist auch durch das zweite Portal hindurchgeführt. Auf dem gemeinsamen Maschinenbett 7 ist ein zweiter Maschinentisch 8' angeordnet, der mit einer eigenen Antriebsvorrichtung 9'-12' versehen ist. At a distance from the back 1 b of the portal 1 is a second similar one Portal 1 'arranged. The crossbeam 2 ', the milling support 3' and milling slide 4 ' are on the side 1'a of the second portal facing away from the first portal 1 ' 1 'arranged. The vertical center axis of the milling carriage 4 'is designated by M 2. The machine bed 7 is also passed through the second portal. On the common Machine bed 7, a second machine table 8 'is arranged, which has its own Drive device 9'-12 'is provided.

Die Ausgestaltung des Universal-Fräskopfes 5' entspricht der Ausgestaltung des Universal-Fräskopfes 5.The design of the universal milling head 5 'corresponds to the design of the universal milling head 5.

Die Länge »L« des zweiten Maschinentisches 8' ist so groß wie die Länge »L« des ersten Maschinentisches 8.The length "L" of the second machine table 8 'is as great as that Length »L« of the first machine table 8.

Der Abstand a der vertikalen Mittelachsen M 1 und M 2 ist in etwa so groß oder größer als die Länge »L« des Maschinentisches 8 oder 8'.The distance a between the vertical central axes M 1 and M 2 is approximately as large or greater than the length "L" of the machine table 8 or 8 '.

Zur Steuerung der Stellmotoren an den Portalen 1, 1: welche die Bewegung in Richtung 1% Z, C und B bewirken und zur Steuerung der Tischantriebsmotoren 9, 9= die die Bewegung in Richtung X bewirken, ist eine NC-Steuerung vorgesehen. To control the servomotors on the portals 1, 1: which control the movement in direction 1% Z, C and B and to control the table drive motors 9, 9 = which cause the movement in the X direction, an NC control is provided.

Damit auch Werkstücke bearbeitet werden können, deren Länge größer ist als die Länge »L« eines Maschinentisches, ist das Maschinenbett 7 auf einer Seite der Fräsmaschine verlängert, so daß es gemessen von der Mittelachse Ml des Frässchlittens 4 eine Länge »L 1« aufweist, die größer ist als die Länge »L« des Maschinentisches. Außerdem ist an den einander zugekehrten Seiten der beiden Maschinentische 8 und 8' eine Kupplungsvorrichtung 19 vorgesehen, mit welcher beide Maschinentische 8, 8' miteinander verbunden werden können. Macht man hierbei die Länge »L 1« des Maschinenbettes 7 beispielsweise eineinhalbmal so groß wie die Länge »L« eines Maschinentisches 8 oder 8', so erhält man bei zusammengekuppelten Tischen 8, 8' eine maximale Arbeitslänge, die eineinhalbmal so groß ist wie die Arbeitslänge »L« eines Tisches. Auf der anderen Seite des Maschinenbettes, wo das Portal 1' angeordnet ist, braucht man jedoch in diesem Fall das Maschinen bett nicht zu verlängern, es kann dort die Länge L aufweisen. So that workpieces can also be machined whose length is greater is than the length "L" of a machine table, the machine bed 7 is on a Side of the milling machine extended so that it measured from the central axis Ml of the Milling slide 4 has a length "L 1" which is greater than the length "L" of the Machine tables. In addition, is on the facing sides of the two machine tables 8 and 8 'a coupling device 19 is provided with which both machine tables 8, 8 'can be connected to one another. Make the length »L 1« of the Machine bed 7, for example, one and a half times as large as the length "L" of a machine table 8 or 8 ', with tables 8, 8' coupled together, you get a maximum working length, which is one and a half times the working length "L" of a table. On the other Side of the machine bed where the portal 1 'is arranged, however, is needed in In this case, not to extend the machine bed, it can have the length L there.

Im Gegensatz hierzu müßte man bei einer herkömmlichen Portalfräsmaschine das Maschinenbett auf beiden Seiten um jeweils eine halbe Tischlänge »L« verlängern, was mit einem entsprechend höheren Platzbedarf der Fräsmaschine verbunden wäre. Bei zusammengekuppelten Tischen gemäß F i g. 4 arbeitet jeweils nur ein Frässchlitten 4, nämlich der rechte Frässchlitten, währund der andere stillgesetzt ist.In contrast, you would have to with a conventional portal milling machine extend the machine bed on both sides by half a table length »L«, which would be associated with a correspondingly higher space requirement for the milling machine. With tables coupled together according to FIG. 4 only one milling slide works at a time 4, namely the right milling slide, while the other is stopped.

Sollen zwei spiegelbildliche Werkstücke überarbeitet werden, die kürzer sind als die halbe Länge eines Maschinentisches 8, 8', dann werden diese Werkstücke auf den einander zugekehrten Hälften der Maschinentische 8, 8' aufgespannt. Während der Bearbeitung der Werk- stücke werden dann die Tische 8, 8' allfeinander zubewegt, bis sie gemäß F i g. 1 ihre strichpunktierte Mittelstellung erreicht haben. Der rechte Maschinentisch wird dabei in Richtung bewegt, der linke Maschinentisch 8' jeweils um den gleichen Betrag in entgegengesetzter Richtung - X Die Bewegungen entlang den übrigen Achsen K Z, W B und C verlaufen dabei zum Teil entgegengesetzt zueinander. Spiegelbildliche Werkstücke, die länger sind als die halbe Tischlänge, kann man auch dadurch bearbeiten, daß man gemäß F i g. 3 beide -Maschinentische 8 und 8' in ihre rechte Ausgangsposition bringt. Es werden dann beide Tische von rechts nach links gleichzeitig in Richtung +X bewegt, wobei ein Teil der Bewegungen entlang der übrigen Bewegungsachsen X,Z, W, Bund Centgegengesetzt zueinander verläuft. If two mirror-image workpieces are to be revised, the are shorter than half the length of a machine table 8, 8 ', then these Workpieces are clamped on the mutually facing halves of the machine tables 8, 8 '. While the work is being pieces are then the tables 8, 8 'in a row moved until it is shown in FIG. 1 have reached their dash-dotted middle position. The right machine table is moved in the same direction as the left machine table 8 'by the same amount in opposite directions - X The movements along the other axes K Z, W B and C run partially in opposite directions to each other. Mirror-image workpieces that are longer than half the table length, can also be processed in that according to FIG. 3 both machine tables 8 and 8 'in their right starting position. Both tables are then from Moved right to left simultaneously in the + X direction, being part of the movements runs along the other axes of movement X, Z, W, and Bund cents opposite to one another.

Sollen zwei identische Werkstücke gleichzeitig bearbeitet werden, so bringt man ebenfalls die beiden Maschinentische 8 und-8' in ihre in F i g. 3 dargestellte Ausgangspositionen und bewegt dann die Tische in Richtung + X Dabei erfolgen die Bewegungen entlang der Bewegungsachsen K Z, W und C an beiden Portalen 1 und t' jeweils in der gleichen Richtung. If two identical workpieces are to be machined at the same time, the two machine tables 8 and 8 'are likewise brought into their position in FIG. 3 starting positions shown and then moves the tables in the + X direction the movements take place along the movement axes K Z, W and C on both portals 1 and t 'each in the same direction.

Soll nur ein Werkstück bearbeitet werden, welches nicht länger ist als ein Maschinentisch, so bewegt man den einen Maschinentisch, beispielsweise den Maschinentisch 8', in seine äußerste linke Stellung und schaltet die Steuerung des linken Portals 1' sowie der Antriebsvorrichtung 9' - 12' völlig ab. Should only one workpiece be machined, which is no longer as a machine table, one machine table, for example the one, is moved Machine table 8 ', in its extreme left position and switches the control of the left portal 1 'and the drive device 9' - 12 'completely.

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Claims

Claim: Automatically controlled portal milling machine with a stationary portal arrangement with two crossbeams arranged back against back to accommodate at least one milling support with a vertically movable milling slide, as well as with one passed through the portal arrangement under the milling supports Machine bed on which a machine table arrangement by means of a feed drive device Mounted to be longitudinally displaceable is characterized in that the portal arrangement consists of two separate portals (1, 1 '), each of which has a machine table (8, 8') assigned to length "L" with its own feed drive device (9-12, 9'-12 ') is, the distance (a) of the vertical central axes (M 1, M2) of the milling carriages (4, 4 ') of the two portals (1, 1') at least as large as the length "L" of the machine tables (8, 8'l that the machine bed (7) on one side of the milling machine measured from the Central axis (M1) of one milling slide (4) has a length "L 1" which is greater is as the length "L" of a machine table (8,8 '), and that on those facing each other Sides of both machine tables (8, 8 ') a coupling device known per se (19) is provided with which the two machine tables (8, 8 ') can be connected to one another are.

The invention relates to an automatically controlled portal milling machine with a stationary portal arrangement, two crossbeams arranged back against back to accommodate at least one milling support with a vertically movable milling slide, as well as with one passed through the portal arrangement under the milling supports Machine bed on which a machine table arrangement by means of a feed drive device Is mounted longitudinally displaceable.

In such a known portal milling machine (CH-PS 431 234) there is a milling support each on the front and back of a shared portal arranged vertically movable milling carriage. There's a on the machine bed relatively long machine table mounted displaceably, the simultaneous It is used to hold two workpieces and a model.

With this milling machine, you can choose between two of the same model at the same time or mirror-inverted workpieces are processed. Simultaneous editing of two completely different workpieces is not possible, since only one is common Machine table is available. In these cases, only one workpiece can be machined at a time so that one of the two milling units stands still and the capacity of the machine is not fully utilized. The arrangement of the two milling units on a common Portal also has the disadvantage that only relatively short workpieces are processed can be. For larger workpieces, a very long and heavy portal construction would result result. Although in the known portal milling machine the machine table is a relatively has a great length, since it can also accommodate the model in addition to the two workpieces workpieces that are longer than a third of the length of the machine table can be used not edited because the The length of the machine bed is not sufficient.

The invention is based on the object of an automatically controlled Portal milling machine with a stationary portal arrangement of the type mentioned at the beginning Art to create that with a small footprint with good capacity utilization except the simultaneous production of two identical or mirror-inverted workpieces also the simultaneous processing of two different workpieces and enables the machining of particularly long workpieces.

This is achieved according to the invention in that the portal arrangement consists of two separate portals, each with a machine table of length »L« is assigned with its own feed drive device, the spacing of the vertical The center axes of the milling slides of the two portals are at least as large as the Length "L" of the machine tables, that the machine bed is on one side of the milling machine, measured from the center axis of the milling carriage, has a length »L 1« which is greater than the length "L" of a machine table, and that on those facing each other A coupling device known per se is provided on both machine tables on both sides is, with which both machine tables can be connected to one another.

This new type of milling machine has two separate milling machines a smaller space requirement. It is very universal with good capacity utilization applicable. Not only identical or mirror-inverted workpieces can be used on it, such as B. pressing tools for the automotive industry are processed, but at the same time also two completely different workpieces, since the portals in one sufficient Are arranged spaced from each other and also two independently movable Machine tables are available. Furthermore, particularly long workpieces can also be used can be processed by moving the two machine tables by means of the coupling device combines to form a double-length table, which is then in its full length a assigned to the two portals for processing this particularly long workpiece can be. By using two machine tables, each with its own Both machine tables can use the drive device for many machining operations operated in such a way that they move towards each other. This makes the guides both milling supports and both crossbeams by the cutting force components positively burdened, d. H. towards the respective portal. As a result, one can make better use of today's high cutting performance. This results in at the same time better utilization of the capacity of the portal milling machine.

The invention is shown in the following, using one in the drawing Embodiment explained in more detail. It shows F i g. I made a longitudinal section the portal milling machine according to the line 1-1 of Fig.

2, fig. 2 a cross section the portal milling machine according to the line 11-lI of Fig. 1, F i g. 3 the schematic Representation of a mode of operation of the milling machine, FIG. 4 the schematic representation the operating mode for a particularly long workpiece.