DE20321663U1 - CNC processing machine for splitting large format plates - Google Patents

Abstract

CNC processing machine for dividing large-format plates (14), in particular wood-based panels, into a plurality of plates having substantially different circumferential contours, with at least one processing table (1) and a cutting or cutting cutting tool (9), characterized by
a device for aligning and fixing the plate (14) on the processing table (1),
a device for attaching at least three reference surfaces to the plate (14),
means for cutting the plates (14) from the top towards the bottom to cut out the individual perimeter contours (K) without severing the plate (14) completely;
a device for turning the plate (14) through 180 °, so that the machined upper side of the plate comes to rest on the processing table (1),
a device for fixing the turned plate (14),
a device for determining the relative position of the plate (14) over the at least one defined point on each reference surface,
a device for cutting the plate ...

Description

The The invention relates to a CNC processing machine for splitting large format Plates, in particular wood-based panels, in a plurality of Plates having substantially different circumferential contours, with at least one machining table and a cutting or machining Processing tool.

A Such machine is used for example in the furniture industry used. From a large-format plate will not only side panels, but also drawer or door fronts cut out of different sizes and perimeter contours. To later with the finished piece of furniture on the one hand, the wood grain evenly and in the same direction and on the other hand when cutting the items to the lowest possible waste The location of the cutting plates is computer assisted established. These methods are known as "Nested Based Manufacturing". The large-format plate as a semi-finished product is placed on the processing table put on and fixed on it. Subsequently, the plates sawn or milled out. When cutting through of the semi-finished product, the support surface is damaged. As a clamping surface is therefore a sacrificial plate made of MDF (medium density fibreboard) or a vacuum table with a special Wear surface used. The milled out Parts need to be, especially with smaller ones Do not move surfaces, fix them from above. The Sacrificial plate can usually be used only once and is before the next processing of a semi-finished product. In addition to the cost of sacrificial plate increase the necessary set-up times for their replacement the manufacturing costs. The fixation of the smaller cut-out plates from above is especially if one after another completely different Circumferential contours are to be cut out, very expensive, since the fixing devices must be designed to be flexible. Another disadvantage is that the sacrificial plates disposed of consuming must be, since they are no longer usable, if theirs both surfaces were cut.

DE 195 27 727 A1 discloses a device for processing wood-based panels in a substantially horizontal position with a sawing and / or milling device, which is computer-controlled movable. The apparatus may additionally comprise a computer-controlled fixing device for the plates, a suction device for the removal of processing residues, means for removing the plate and / or means for mounting or removing the plate.

In the DE 195 17 295 A1 a device for feeding plate dividing systems is described with plate-shaped workpieces, in which the plate-shaped workpieces are transferred by means of a vacuum lifter from the plate stack on the support or leveling table.

Next Wood-based panels also come composites, sandwich panels or aluminum plates or other large-format building boards in question. In addition to the furniture industry, "Nested Based Manufacturing "also used in prefabricated houses polyurethane, polystyrene or their sandwich panels used are processed accordingly.

From Based on this problem, the "Nested Based Manufacturing "and in particular the use of a Sacrificial plate are avoided to fix the plate parts too simplify.

The problem solution takes place in a generic CNC processing machine by:
a device for aligning and fixing the plate ( 14 ) on the processing table ( 1 )
a device for attaching at least three reference surfaces to the plate ( 14 )
a device for cutting the plates ( 14 ) starting from the top in the direction of the bottom for cutting out the individual peripheral contours (K), without the plate ( 14 ) completely cut through,
a device for turning the plate ( 14 ) by 180 °, so that the machined top of the plate to rest on the processing table ( 1 ),
a device for fixing the turned plate ( 14 )
a device for determining the relative position of the plate ( 14 ) over the at least one defined point on each reference surface,
a device for cutting the plate ( 14 ) starting from the underside lying to Colonel along mirror-image peripheral contours (K '), so that the plate ( 14 ) is completely severed and the plurality of plates is obtained.

Thereby, that the semifinished product is not completely severed at first is completely dispensed with the use of a sacrificial plate become. The working table can consequently be equipped with a vacuum system be equipped for fixing the plate. This vacuum system also fixes the individual smaller plates with different ones Circumferential contours, if this from the back of the semifinished product be completely cut out. An elaborate Fixation from above can also be omitted, so that a significantly more rational production is possible.

The reference surfaces are produced on the side edges of the plate by milling. The machining ensures that no chips project from the side edge (If, for example, as a semi-finished chipboard is used) interfere with the scanning of the reference surfaces.

Preferably is after the first and / or second determination of the relative position the plate on the editing table a coordinate transformation performed to the machining tool accordingly to calibrate, d. H. at a defined point with the work to be able to start.

In front turning the plate is preferably in a device for Removing the chips transported. This can happen to a combined brush, blowing and suction device Acts that did not affect the processing during the extraction Chips are removed to turn when turning or second cutting the plate damages the surface to avoid flying or separated chips.

If the plate is stored after turning on a second processing table The production is further streamlined because of the first processing table then becomes free for re-placement, so that is convenient can work in opposite directions.

A preferred CNC processing machine is characterized by two processing tables and a pivoting device for lifting the plate from the first processing table, Turn by 180 ° and place on the second working table out.

Preferably are both processing tables with a vacuum device for Fix the plate provided.

To the Aligning the plate, the first processing table preferably Attacks on. By the stops leaves Align the plate easily. Because of the relative position the plate through the three reference surfaces detected by probes can, by a coordinate transformation, the editing tool individually adjusted to a defined starting point. The location of the stops on the machining table is therefore freely selectable.

To turning the plate, its relative position again over determines the reference surfaces, with the probes always at the same height (Z-direction) at the side edges of the Attack plate, causing inaccuracies in the transfer detected and possibly also via a coordinate transformation can be charged.

The Swiveling device is preferably between the two machining tables arranged. The first processing table has recesses, to intervene in the arms of the pivoting devices, so that the first Machining table a "closed" surface having. On the arms of the pivoting device is preferably also provided a vacuum device, so that the plate on both the first processing table as well as later pivoting or turning and dropping on the second working table the applied vacuum is fixed on the arms.

With Help a drawing is an embodiment of the Invention will be explained in more detail below. It shows:

1 the schematic representation of the CNC processing machine;

2 the first processing table in an enlarged view 1 with applied semifinished product;

3 a representation of the scanning of the reference surfaces on the semifinished product;

4 the first cutting or machining of the semifinished product;

5 an enlarged view 4 ;

6 the transfer station of the CNC processing machine;

7 the transfer of the semifinished product from the first processing table to the second processing table in a first position;

8th the transfer of the semifinished product from the first processing table to the second processing table in a second position;

9 the transfer of the semifinished product from the first processing table to the second processing table in a third position;

10 the placed on the second processing table plate;

11 the mirrored processing of the semi-finished product on the second processing table from the back.

1 shows the perspective view of the CNC processing machine with the two processing tables 1 . 2 , which in Y-direction on each a frame 4a . 4b are arranged displaceably. Across the racks 4a . 4b There is a bridge 8th , at the two cutting tools 9 . 10 on sledges 19 . 20 are slidably mounted in the X direction. The cutting tool 9 Edits this on the first editing table 1 resting semi-finished and the cutting tool 10 After processing it on the second processing table 2 was filed. Between the editing tables 1 . 2 is a swivel device 3 arranged, the three arms 5 . 6 . 7 having. The poor 5 . 6 . 7 grab in recesses 11 . 12 . 13 in the working table 1 a (compare 8th ). The top of the arms 5 . 6 . 7 ends in the same plane as the support surface of the editing table 1 , so here's a closed surface to rest the semifinished product 14 is available.

The bearing surfaces of the machining tables 1 . 2 and the arms 5 . 6 . 7 are with a plurality of openings 15 provided, which communicate with a vacuum device, so that to the plate 14 a vacuum can be applied for fixing. At the cutting tools 9 . 10 it can be saws or cutters.

The plate 14 as a semi-finished product is first manually or by means of a handling device not shown here on the editing table 1 hung up. The poor 5 . 6 . 7 the pivoting device 3 lie within the recesses 11 . 12 . 13 of the editing table 1 , For fixing the plate 14 are at the editing table 1 three attacks 16 . 17 . 18 intended.

At the side edges of the plate 14 be after fixing on the working table 1 provided at least three milled and / or ground reference surfaces on which at least one defined point is present, the one on the carriage 19 . 20 the cutting tools 9 . 10 attached probe 21 . 22 can be detected. Through these three points, the relative position of the plate 14 on the processing table 1 determined and can then be defined by means of coordinate transformation to an absolute position in space. About a corresponding displacement of the cutting tool 9 in the X direction and moving the editing table 1 on the rack 4a in the Y direction can be the zero point at which with the cutting out of the plate 14 must be started. Subsequently, then by appropriate displacement of the work table 1 and the sled 19 the different contours K from the plate 14 cut out, taking the depth of the cutting tool 9 is set so that the plate 14 not completely severed.

When the contours K are all cut out, the working table becomes 1 moved to the outer end of the processing plant, so that he laterally next to the machining table 2 is placed. About the pivoting device 3 becomes the partially severed plate 14 on the editing table 2 filed with the bottom first, like this one 6 - 9 in individual representations can be removed. Is the plate lying 14 on the processing table 2 on, the vacuum is in the arms 5 . 6 . 7 solved and vacuum on the machining table 2 put on, leaving the plate 14 on the processing table 2 is fixed. The poor 5 . 6 . 7 the pivoting device 3 panning in the first working table 1 back so that he is ready with a new semi-finished product 14 to be equipped.

After the plate 14 on the second working table 2 was fixed, are not shown here on the slide 20 of the cutting tool 10 fixed probe, which is identical to the probe 21 is formed, the reference surfaces or the defined points scanned on the reference surfaces, so that again the absolute position of the plate 14 can be determined and the cutting tool 10 by appropriate displacement of the machining table 1 or the carriage 20 can be brought into the zero position. By means of coordinate transformation, the data of the contours K are converted into data of the played contours K ', so that in the second operation the mirrored contours K' from the back of the plate 14 can be cut out, leaving thereby the plate 14 then completely severed. The smaller plates are over the working table 2 fitting vacuum on the top of the machining table 2 fixed and can be removed there after they have been completely cut out, by hand or by means of a handling system.

At the sled 19 . 20 is next to the touch probes 21 and the cutting tools 9 . 10 provided a suction device not shown here, which sucks the respective chips immediately. Before the plate 14 from the first processing table 1 on the second working table 2 is discarded, the plate is 14 passed on a suction, blowing and brushing unit, not shown here, to remove chips that have not been sucked off immediately during processing, to damage the surface of the plate 14 when turning or editing the back to avoid.

The contours K, K 'can by vertical cuts or through the surface of the plate 14 oblique cuts (for example by means of a pivotable about the X or Y axis unit or a 5-axis robot head unit) are cut out. For slanted cuts, the plate parts are mitred. As a processing plant and conventional machining centers (for example, in C-frame design as a jib or portal machine with movable portal) used when two machines are faced with the machining side. Every working table 1 . 2 can with its own associated pivoting device 3 be provided so that an alternating field processing is possible. Likewise, between these two machines, a swivel device 3 which are the plate from the working table 1 on the editing table 2 sets.

1

processing table

2

processing table

3

Pivot means

4a

frame

4b

frame

5

poor

6

poor

seven

poor

8th

bridge

9

cutting tool

10

cutting tool

11

recess

12

recess

13

recess

14

Semi-finished / plate

15

opening

16

attack

17

attack

18

attack

19

carriage

20

carriage

21

probe

K

contour

K '

mirrored contour

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 19527727 A1 [0003]
• - DE 19517295 A1 [0004]

Claims (10)

CNC processing machine for splitting large format plates ( 14 ), in particular wood-based panels, into a plurality of panels with substantially different circumferential contours, with at least one processing table ( 1 ) and a cutting or cutting cutting tool ( 9 ), characterized by means for aligning and fixing the plate ( 14 ) on the processing table ( 1 ) means for attaching at least three reference surfaces to the plate ( 14 ), a device for cutting the plates ( 14 ) starting from the top in the direction of the bottom for cutting out the individual peripheral contours (K), without the plate ( 14 ) completely cut through, a means for turning the plate ( 14 ) by 180 °, so that the machined top of the plate to rest on the processing table ( 1 ), a device for fixing the turned plate ( 14 ) means for determining the relative position of the disk ( 14 ) over the at least one defined point on each reference surface, means for cutting the plate ( 14 ) starting from the underside lying to Colonel along mirror-image peripheral contours (K '), so that the plate ( 14 ) is completely severed and the plurality of plates is obtained. CNC processing machine according to claim 1, characterized in that after the first and / or second determination of the relative position of the plate ( 14 ) a coordinate transformation is feasible to the machining tool ( 9 . 10 ) to calibrate. CNC processing machine according to claim 1, characterized in that the plate ( 14 ) is transportable before turning in a device for removing the chips. CNC processing machine according to claim 1, characterized in that the plate ( 14 ) after turning on a second working table ( 2 ) can be stored. CNC processing machine according to claim 1, characterized characterized in that the mirror-image position of the peripheral contours (K ') taken into account together with the coordinate transformation becomes. CNC processing machine according to claim 4, characterized by two processing tables ( 1 . 2 ) and a pivoting device ( 3 ) for lifting the plate ( 14 ) from the first processing table ( 1 ), Turning the plate by 180 ° and placing it on the second working table ( 2 ). CNC processing machine according to claim 6, characterized in that the processing tables ( 1 . 2 ), with a vacuum device for fixing the plate ( 14 ) are provided. CNC processing machine according to claim 6, characterized in that the first processing table ( 1 ) for aligning the plate ( 14 ) Attacks ( 16 . 17 . 18 ) having. CNC processing machine according to claim 6, characterized in that the first processing table ( 1 ) Recesses ( 11 . 12 . 13 ), in the arms ( 5 . 6 . 7 ) of the pivoting device ( 3 ) intervene and the arms ( 5 . 6 . 7 ) of the pivoting device ( 3 ) with the top of the processing table ( 1 ) lie in one plane. CNC processing machine according to claim 9, characterized in that the arms ( 5 . 6 . 7 ) of the pivoting device ( 3 ) with a vacuum device for holding the plate ( 14 ) are provided.