EP1136206B1 - Pivotable milling machine - Google Patents

Abstract

The device has a machine table (2) with stop (7) and milling unit with spindle (31) and milling tool. There is a bearing unit (30), adjustable in various directions, for pivoted bearing of the milling spindle, in vertical height direction and horizontal depth direction relative to the machine table. Part of the table is formed by an insert slide (15), which has a slot for the milling tool and is flush with the working surface (3) of the table. The insert can be moved downwards and is coupled to the bearing unit for the spindle, so that a downward movement of the spindle causes a synchronous movement of the insert.

Description

The invention relates to a swivel milling machine with the in the preamble of claim 1 specified features.

In swivel milling machines of this generic type on the market Type is the milling device in a storage facility on the machine stand kept a pivoting of the milling spindle with the Milling tool in a swivel range of +/- 45 ° backwards or forwards allows. The milling tool is in a table opening of the machine table arranged, the milling depth of the tool relative to the workpiece by shifting the on the machine table arranged milling stop takes place in the depth direction.

This milling depth infeed via the milling stop has the disadvantage that with Every change in the milling depth changes the lateral position of the workpiece. This also means that the workpiece must be transported through the milling machine Feed device, which is usually attached to a type of gallows and accesses the workpiece from above, in its lateral position be adjusted according to the adjustment of the milling stop. This is annoying and time-consuming with frequent changes in the milling depth.

In the known swivel milling machines is also for height adjustment the milling tool is provided a degree of stroke freedom along the spindle axis. When the spindle is swiveled out of the zero position, it has a lifting movement along the spindle axis, however, the milling depth also changes Episode. This in turn means that to compensate for this change in depth the milling stop and the feed device accordingly are to be adjusted.

From US-A-5 396 937 is a router table with a horizontal main table top and a hinged side pivot plate known. On the underside of the swivel plate is a carriage that is transverse to the feed direction of the workpiece slidably guided and in this direction a manual spindle drive adjustable. A hand milling device can be attached to the sled be flanged, its milling tool over corresponding recesses in the slide, the swivel top and the main table top in the Work area of the milling table intervenes.

With an inclined position of the swivel plate, an adjustment of the Carriage and thus the hand milling device whose milling tool both in Moved both deep and high.

Starting from the described problems of the prior art the invention is based on the object, a swivel milling machine to improve so that it is more rational and time-saving with high universality can be used for a wide variety of milling tasks.

This object is achieved by the features of claim 1 solved. So there is one multi-axis adjustable storage facility provided with three degrees of freedom, namely the previously usual pivoting of the milling device as well as an adjustment of the milling spindle in the vertical height direction and horizontal depth direction. This means that with a swiveled Position of the spindle whose height adjustment is parallel to the Causes spindle to itself, so - unlike a stroke along the spindle axis in the prior art - no change in the infeed depth takes place. In this respect there is no adjustment of the milling stop when adjusting the height of the milling tool necessary. By the further provided adjustable mounting of the milling spindle in the horizontal depth direction the machine can now basically carry out the milling depth feed directly an adjustment of the milling tool itself and not by the milling stop be made. This means that if the Milling depth infeed the feed device at a constant lateral position can remain and does not have to be adjusted. This brings you considerable rationalization effect when working with the invention Swivel milling machine with itself.

The above construction also brings in the area of the machine table a constructive simplification, since the milling stops are not must be more adjustable in the depth direction.

Due to the adjustability of the milling device in the depth direction of the Machine table is a side problem that the table opening in itself would have to offer enough space for the milling tool to accommodate this to allow lateral movement. However, this would be a relatively large distance and gap between work and safety the milling tool and the edge of the table opening. Around To remedy this situation, the invention sees in a preferred embodiment before part of the machine table through an insert slide form, which partially forms the table opening for the milling tool. This Insert slide can be moved in the depth direction and with the storage facility coupled for the milling spindle such that a depth shift the milling spindle in a synchronous depth adjustment of the insert slide is feasible. This means that the edge of the table opening with the usual "Air" can reach the milling tool. Will the latter adjusted laterally, the insert slide follows this adjustment movement, so that the gap between the milling tool and the edge of the table opening preserved. When replacing the milling tool, for example the insert slide can be made with a larger diameter cutter in its position relative to the milling spindle, i.e. regardless of the Bearing device for the milling spindle adjustable in the horizontal depth direction be as a preferred embodiment of the invention further provides. So that the insert slide can be moved so that the Edge of the table opening again up to the usual gap Milling tool reaches.

Fig. 1

eine schematische Seitenansicht einer Schwenkfräsmaschine in Vorschubrichtung des Werkstückes gesehen,

Fig. 2

eine Frontansicht der Fräsmaschine aus Pfeilrichtung II gemäß Fig. 1 bei abgenommener Frontabdeckung,

Fig. 3 bis 6

schematische Vertikalschnitte der Fräsmaschine entlang der Schnittlinie III-III nach Fig. 2,

Fig. 7

eine schematische Draufsicht auf die Fräsmaschine von oben und

Fig. 8

eine schematische Draufsicht analog Fig. 7 bei abgenommenem Maschinentisch.

Further subclaims relate to preferred embodiments of the bearing device, the milling stop and the workpiece feed device. To avoid repetition, reference is made in this connection to the following description of an embodiment with reference to the accompanying drawings. Show it:

Fig. 1

a schematic side view of a swivel milling machine seen in the feed direction of the workpiece,

Fig. 2

2 shows a front view of the milling machine from the direction of arrow II according to FIG. 1 with the front cover removed,

3 to 6

schematic vertical sections of the milling machine along the section line III-III of FIG. 2,

Fig. 7

a schematic plan view of the milling machine from above and

Fig. 8

a schematic plan view analogous to FIG. 7 with the machine table removed.

As is clear from FIGS. 1 and 2, the swivel milling machine has one as a whole with 1 designated machine stand with several, not specified shown pillars and struts. A machine table 2 is arranged on it, the top of the work surface 3 of the milling machine forms. The machine stand 1 is by a front cover 4, side covers 5 and a rear cover 6 enclosed.

On the machine table 2 is a parallel to the feed direction V the Milling workpieces 45 (Fig. 3 to 6) running, vertical milling stop 7 mounted, which in the usual way from an inlet jaw 8 and there is a discharge jaw 9. The two jaws 8, 9 form between their mutually facing, vertically standing, bevelled end faces 10, 11 a gusset-shaped milling gap 12 through which the rotationally symmetrical Milling tool 13 in the machining area on the work surface 3 takes effect. In the machine table 2 there is also essentially a top view circular table opening 14 (Fig. 2 to 8) provided for the milling tool 13. This table opening 14 is in the machining area of the milling tool 13 not by the machine table 2 itself, but by an im Machine table arranged insert slide 15 formed in plan view approximately rectangular with a semicircular recess 16 in the the milling stop 7 facing side is formed. The top of the Insert slide 15 is in one plane with the working surface 3 of the machine table arranged. Furthermore, the insert slide 15 is closer in later to be discussed in the depth direction T displaceable in the machine table 2 stored.

As can also be seen from FIGS. 1 and 2, is in the rear area a vertically extending bearing column 17 is arranged on the machine stand, which clearly overlooks the machine table 2. At the top is one fixed, projecting boom 18, the control panel 19 of the milling machine assembled. About halfway between machine table 2 and Control panel 19 is on the bearing column 17 via a mounting block 20 Cantilever arm 21 attached, the usual at its free front end Feed device 22 for the milling workpieces 45, such as squared timbers, Wearing boards or the like. This feed device 22 is as such known and points downward from its housing, rubber-elastic, resiliently mounted rollers 23, which have a corresponding Drive can be set in rotation. The feed device 22 sets with these rollers 23 from above onto the respective workpiece 45 and pushes this in the feed direction V on the work surface 3 at the milling stop 7 along through the machine. Through a certain inclination the feed device 22 becomes the milling workpiece 45 in a known manner pressed against the milling stop 7, so that a clean guide of the Workpiece 45 takes place.

The cantilever arm 21 is in the mounting block 20 in the longitudinal direction of the arm 21 slidably mounted, the boom length via a spindle drive 24 and thus the position of the feed device 22 transverse to the feed direction V is variable. Furthermore, the mounting block 20 is around the vertical pivotally attached to the bearing column 17.

The height adjustment of the feed device 22 for position adjustment the rollers 23 to the height of the respective workpiece 45 is motorized in that the bearing column 17 in a corresponding height guide 25th is vertically displaceably attached to the machine stand 1. The drive takes place via a spindle drive 26, which is actuated by an electric motor 27 becomes. Via a sensor 28 coupled to the spindle drive 26 Height position of the cantilever arm 21 and thus the feed device 22 can be detected by the control device of the milling machine.

The fixation of the bearing column 17 in a certain height position on Machine stand is done by a clamping lever 29 from the rest Front of the machine, the clamping lever 29 via a corresponding Mechanics (dash-dotted lines in Fig. 1) on the bearing column 17 accesses. Also automatic clamping using a clamping cylinder is conceivable.

With a CNC control of the milling machine, the workpiece height in the control program for a specific workpiece and the feed device 22 by the automatic spindle drive 26 be moved to an appropriate height. Instead of the electric motor 27 can also a hydraulic or pneumatic cylinder for the drive the bearing column 17 are used in the vertical direction.

The multi-axis adjustable bearing device 30 for each Milling tool 13 carrying milling spindle 31 can be seen with reference to FIGS. 2 to 6 is to explain. Accordingly, the bearing device 30 is basically on in the depth direction T extending crossbars 32 of the machine stand 1 in this direction slidably mounted. A base support 33 is provided for this purpose, which is only indicated schematically in FIGS. 2 to 6. He can follow Kind of a carriage or conveyor basket on the cross members 32 slidable be hung up. The base support 33 can have lateral height guide cross members 34, on which an intermediate carrier 35 in the vertical direction is guided up and down. The vertical movement of this intermediate beam 35 is accomplished by means of two lateral spindle drives 36 which from an electric motor 37 on the base support 33 via a chain hoist 38 are driven.

In the intermediate carrier 35, a spindle carrier 39 is in turn horizontal and pivotable parallel to the feed direction V pivot axis 40 stored. The pivoting movement is carried out on the intermediate carrier 35 flanged electric motor 41, the over a chain hoist 42 accesses the bearing shaft 43 of the spindle carrier 39. The spindle motor 44 is suspended in the spindle carrier 39, on its output shaft the milling spindle 31 is seated with the respective milling tool 13. The milling spindle 31 is thus integrated directly into the spindle motor 44. The The pivot position of the spindle carrier 39 is otherwise by an angle encoder 46 detected on the bearing shaft 43. In this context can be seen from FIGS. 3 to 6 that the milling device with spindle carrier 39, spindle motor 44, milling spindle 31 and milling tool 13 in one Swivel angle S of - 45 ° (Fig. 4) - this means a tilted backwards Milling spindle 31- over 0 ° (Fig. 3) - this means a vertically after top milling spindle 31 - and + 45 ° (Fig. 5) to + 95 ° (Fig. 6) pivotable is. Due to the latter position, the swivel milling machine is particularly suitable for the conical face milling shown in FIG. 6.

The adjustment of the base support 33 of the bearing device 30 in the depth direction T along the crossbeams 32 is done manually via one on the machine stand 1 arranged hand spindle drive 47, the one on the front the machine can be operated via a rotary handle 48. In the handle 48 is integrated a counter that one of the depth position of the base support 33rd shows the corresponding value. This means that the set milling depth can be read become.

With the base support 33 is also a coupling crossbar 49 already addressed slide valve 15 connected so that with a depth adjustment the base support 33 and the insert slide 15 within the machine table 2 in the depth direction T according to the depth adjustment of the milling tool 13 is also adjusted.

In addition, there is a between crossbar 49 and insert slide 15 Adjustment spindle 50 arranged by a further rotary handle 41 on the Front of the insert slide 15 is actuated. With the help of this spindle drive 50, 51 is the relative position of the insert slide 15 in the depth direction based on the bearing device 30 and thus the milling tool 13 adjustable. This is necessary if the dimensioning or Position of the milling tool 13 due to a tool change or when pivoting the milling spindle 31 changes. This is very obvious understandable by comparing FIGS. 3 to 6. Depending on The insert slide has the swivel angle S and the type of tool 13 there 15 a different depth position relative to the storage device 30 on.

7 and 8 is the interaction between the depth adjustment of the milling tool 13 and the displacement of the insert slide 15 to explain. For example, if the milling depth should be based on the 7 and 8 reduced position shown with solid lines be that the position of the milling tool 13 shown in dashed lines is taken is, then only the rotary handle 48 for the adjustment of the To operate base support 33. As a result, the base support 33 becomes in the depth direction T moved, at the same time the insert slide 15 with after drives behind and remains in its close vicinity to the milling tool 13. This also means that only the jaws 8, 9 of the milling stop 7 in the feed direction V to the retracted position of the milling tool 13 adapted and accordingly to a narrower milling gap 12 must be moved together. There is no adjustment in the depth direction T. of the stop 7 required, so that the feed device 22 does not need to be adjusted when changing the milling depth. This means a considerable saving of time when working with the invention Swivel milling machine.

Now finds a milling tool change, for example, in that in FIGS. 7 and 8 position with solid lines instead and it becomes a Milling tool with a smaller diameter installed (see dotted Outline in FIGS. 7 and 8), so only the insert slide 15 through Actuation of the turning handle 51 can be adjusted relative to the base support 33, around the table opening 14 formed by the insert slide again close to the Approach the contour of the reduced-diameter milling tool 13 '(see dash-dotted contour in Fig. 2). That the semicircular section of the Table opening 14 in insert slide 15 has a constant diameter, remains in this approached position in front of and behind the Milling tool 13 ', however, is semi-crescent-shaped towards the stop 7 widening gap.

It remains to be added that with a CNC-controlled machine all manual Actuating functions through appropriate servomotors and measuring systems via corresponding inputs on a PLC keyboard or via program memory can be controlled automatically. That also includes a possible adjustment of the inlet and outlet jaws 8, 9, if this is desired as an option. In connection with the insert slide 15 With a CNC control the slide can be controlled automatically by a servomotor to the respective tool diameter with an air gap of z. B. 2 mm to the tool.

Claims (11)

1. Pivoted milling machine, comprising

   a machine stand (1);

   a worktable (2) disposed thereon, having an opening (14) for a milling tool (13, 13');

   a milling stop (7) disposed on the worktable (2); and

   a milling device which is mounted in the machine stand (1) and comprises a milling spindle (31) that supports the milling tool (13, 13') and is driven by a spindle motor (4); characterized by

   a triaxially adjustable bearing equipment (30) for bedding the milling device (13, 13', 31, 44) individually pivoted and adjustably relative to the work table (2) in a vertical direction of height (H) and a horizontal direction of depth (T).
2. Pivoted milling machine according to claim 1, characterized by a slide insert (15) that constitutes part of the worktable (2),

   the slide insert (15) at least sectionally forming the opening (14) for the milling tool (13, 13');

   the top side of the slide insert (15) being level with the working surface (3) of the worktable (2); and

   the slide insert (15) being displaceable in the direction of depth (T) and coupled with the bearing equipment (30) for the milling device (13, 13', 31, 44) in such a way that any displacement in depth of the milling device (13, 13', 31, 44) is convertible into synchronous adjustment in depth of the slide insert (15).
3. Pivoted milling machine according to claim 2, characterized in that the slide insert (15) is adjustable in position relative to the milling device (13, 13', 31, 44).
4. Pivoted milling machine according to one of claims 1 to 3, characterized in that the bearing equipment (30) comprises a base support (33) which is adjustable in the direction of depth (T) of the worktable; an intermediate support (35) which is bedded therein for height adjustment; and a spindle support (39) which, in the intermediate support (35), is pivoted about a horizontal pivot axis (40) that extends parallel to the direction of feed (V) of the work piece through the milling machine.
5. Pivoted milling machine according to claim 4, characterized in that the intermediate support (35) and the spindle support (39) are adjustable by servomotors (37, 41).
6. Pivoted milling machine according to claim 4 or 5, characterized in that the base support (33) is manually adjustable preferably by a hand-operated spindle drive (47).
7. Pivoted milling machine according to claim 2, characterized in that adjustment of the slide insert (15) relative to the milling device (13, 13', 31, 44) takes place by way of a manual adjusting device, in particular by way of an adjusting spindle (50) that cooperates with a base support (33).
8. Pivoted milling machine according to one of claims 1 to 7, characterized in that the run-out jaw (9) of the milling stop (7) is stationary in the direction of depth (T) and the run-in jaw (8) thereof is variably adjustable.
9. Pivoted milling machine according to one of claims 1 to 8, characterized in that the milling device (13, 13', 31, 44) is bedded in the bearing equipment (30) for pivoting by an angle (S) of between -45° and +95°.
10. Pivoted milling machine according to one of claims 1 to 9, characterized in that a work piece feeder (22) is disposed above the worktable (2) on a bearing column (17) which is guided for height adjustment on the machine stand (1) and which is mounted for motor-operated up and down displacement.
11. Pivoted milling machine according to one of claims 1 to 10, characterized in that the milling spindle (31) is integrated into the spindle motor (44).

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