EP1281491B1 - Apparatus and method for machining wooden, plastic or similar workpieces - Google Patents

Abstract

The machine tool machines workpieces (3). It has a longitudinal shaping unit (2) with at least one spindle. The workpiece is taken past this by a feeder (15), clamped in clamping jaws. At least some of the upper clamping jaws rest on interstices of the lower clamping jaws when seen in plan view, leaving a small free space for adjustment.

Description

The invention relates to a machine for processing workpieces made of wood, plastic or the like according to the preamble of claim 1 and a method for processing workpieces according to claims 25, 28, 30 and 34.

Such a machine is disclosed in EP-A-922 547. With such machines workpieces are processed from which window and door frames or window sash are made. In the Längsprofiliereinheit the workpieces are profiled on their long sides. For transporting the workpieces through the Längsprofiliereinheit feed rollers are provided in other machines, which are suspended on a support and rotatably driven. These feed rollers press on the workpieces, which are supported on tabletops and on which they are transported with the feed rollers through the machine. The feed rollers wear and dirty, so that the transport of the workpieces is impaired. In addition, the transport of short workpieces is problematic.

The invention has the object of providing the generic machine and the generic method in such a way that a reliable and easy transport through the machine, a dimensionally accurate positioning of the workpieces and a flexible clamping for different machining operations and different workpieces is created.

This object is achieved according to the invention in the generic machine with the characterizing features of claim 1 and the generic method according to the invention with the characterizing features of claims 25, 28, 30 and 34.

In the machine according to the invention, a tensioning unit is used as a feed unit in the Längsprofiliereinheit, with which the workpieces to be processed are not only clamped, but also transported by the Längsprofiliereinheit. Due to the feed unit according to the invention, feed rollers are no longer necessary in the Längsprofiliereinheit. The workpieces to be machined are reliably detected by the clamping unit and conveyed together with it through the machine. Slippage problems, as observed with feed rollers, do not occur. By using the clamping unit, the top surfaces of the workpieces are treated gently, which results in excellent machining quality. With the clamping unit and very short workpieces can be detected and edited. Since the clamping unit is moved in the longitudinal profile unit, each workpiece can be tracked, measured and positioned very precisely over the axes of the machine. It can be dispensed with limit switch, as used in conventional machines. The jaws are arranged above and below the workpiece, so that it is clamped from above and below. As a result, the workpiece can be easily processed on its longitudinal sides with appropriate tools. The upper and lower clamping jaws are arranged so that they, as seen in plan view, are arranged in a gap to each other and between them each have a small space. Such a design of the clamping device, the workpieces can be universally, flexibly and safely clamped. At least one of the upper jaws can advantageously be sunk in a lower end position, so that on the machine, for example, frames can be milled. The clamping jaw, which lies in the region of a frame part, in this case is sunk in the lower end position. In the same way, bores can be introduced into the upper side of the workpieces when the corresponding upper clamping jaw located in the region of the bore is sunk into the lower end position. The located between the upper and lower jaws small space ensures that the corresponding upper jaw moves securely in the lower end position can be. The workpieces can be processed in the clamped position with an extremely high accuracy and quality, especially thin and short parts. If the workpieces are handed over between individual machining processes, they remain attached the transfer always clamped, so that a highly accurate processing is guaranteed.

Further features of the invention will become apparent from the other claims, the description and the drawings.

Fig. 1

in perspektivischer Darstellung eine erfindungsgemäße Maschine,

Fig. 2

in Draufsicht und in schematischer Darstellung den Verfahrensablauf bei der Bearbeitung von Hölzern in einer ersten Ausführungsform einer erfindungsgemäßen Maschine,

Fig. 3

in einer Darstellung entsprechend Fig. 2 den Verfahrensablauf bei der Bearbeitung von Hölzern einer zweiten Ausführungsform einer erfindungsgemäßen Maschine,

Fig. 4

in perspektivischer Darstellung eine Vorschubeinheit der erfindungsgemäßen Maschine,

Fig. 5

in perspektivischer und vergrößerter Darstellung einen Teil der Vorschubeinheit gemäß Fig. 4,

Fig. 6

eine Draufsicht auf einen Teil der Vorschubeinheit gemäß Fig. 4,

Fig. 7 bis 11

den Verfahrensablauf bei der Übergabe der zu bearbeitenden Werkstücke von einer ersten Vorschubeinheit an eine zweite Vorschubeinheit,

Fig. 12

eine Transporteinheit der erfindungsgemäßen Maschine in einer Ausgangsstellung,

Fig. 13

die Transporteinheit gemäß Fig. 12 in der Arbeitsposition,

Fig. 14

in vergrößerter Darstellung einen Teil der Vorschubeinheit gemäß den Fig. 4 bis 6 in Seitenansicht,

Fig. 15

in vergrößerter Darstellung zwei Vorschubeinheiten der Maschine gemäß Fig. 2, von der Auslaufseite der Maschine aus gesehen;

Fig. 16

in perspektivischer Darstellung einen Teil der erfindungsgemäßen Maschine, auf der ein Umfälzvorgang durchgeführt wird,

Fig. 17a bis Fig. 17d

verschiedene Verfahrensschritte bei Durchführung des erfindungsgemäßen Verfahrens auf einer weiteren Ausführungsform einer erfindungsgemäßen Maschine,

Fig. 18

in Draufsicht eine weitere Ausführungsform einer erfindungsgemäßen Maschine,

Fig. 19a bis Fig. 19e

verschiedene Verfahrensabschnitte bei der Bearbeitung der Werkstücke auf einer weiteren Ausführungsform einer erfindungsgemäßen Maschine,

Fig. 20 und Fig. 21

jeweils in perspektivischer Darstellung unterschiedliche Spannsituationen einer weiteren Ausführungsform einer Vorschubeinheit der erfindungsgemäßen Maschine.

The invention will be explained in more detail with reference to an embodiment shown in the drawings. Show it

Fig. 1

in a perspective view of a machine according to the invention,

Fig. 2

in a plan view and in a schematic representation of the procedure in the processing of woods in a first embodiment of a machine according to the invention,

Fig. 3

2 shows the procedure in the processing of wood of a second embodiment of a machine according to the invention,

Fig. 4

a perspective view of a feed unit of the machine according to the invention,

Fig. 5

in a perspective and enlarged view of a part of the feed unit of FIG. 4,

Fig. 6

a plan view of a portion of the feed unit of FIG. 4,

Fig. 7 to 11

the procedure during the transfer of the workpieces to be processed from a first feed unit to a second feed unit,

Fig. 12

a transport unit of the machine according to the invention in a starting position,

Fig. 13

the transport unit according to FIG. 12 in the working position,

Fig. 14

in an enlarged view a part of the feed unit according to FIGS. 4 to 6 in side view,

Fig. 15

in an enlarged view, two feed units of the machine of Figure 2, viewed from the outlet side of the machine.

Fig. 16

in a perspective view a part of the machine according to the invention, on which a Umfälzvorgang is performed,

Fig. 17a to Fig. 17d

Various method steps in carrying out the method according to the invention on a further embodiment of a machine according to the invention,

Fig. 18

in plan view another embodiment of a machine according to the invention,

19a to Fig. 19e

Various process sections in the processing of the workpieces on a further embodiment of a machine according to the invention,

FIGS. 20 and 21

each in a perspective view different clamping situations of another embodiment of a feed unit of the machine according to the invention.

With the machine described below, woods are processed; from which, for example, window or door frames or wings are assembled. In the machine but also wood can be edited, which are used for stairs, furniture parts in frame or tunnel construction or the like. The machine according to FIG. 1 has a transverse profiling unit 1 and a longitudinal profiling unit 2 lying at right angles to it. The timber 3 is machined on the face side with the transverse profiling unit. In the Längsprofiliereinheit 2, the woods are then profiled on their long sides.

The wood to be processed 3 are preferably centrally clamped in the Querprofiliereinheit 1 with a clamping device 4 in a predetermined position, which is on a carriage 5 'about a vertical axis 6 pivotally. The carriage 5 'can be moved along a cross slide 5, which is movable along a guide 7. Both carriages 5, 5 'are thus adjustable in mutually perpendicular directions.

The Querprofiliereinheit is provided with at least one saw 8, with which the respective end of the wood 3 can be sawn off. Depending on the position of the wood 3 relative to the saw 8, the front sides of the wood 3 perpendicular, but also acute-angled or obtuse-angled to the longitudinal direction of the wood sawn. In this case, the wood 3 is pivoted about the axis 6 with the clamping device 4 at the desired angle. For this purpose, a (not shown) motor drive is provided, with which the clamping device 4 can be automatically pivoted to the desired position. Advantageously, the clamping device 4 is connected to a CNC controller.

The saw 8 has a circular saw blade 9 which is rotatably driven about a horizontal axis. Following the saw 8, the Querprofiliereinheit 1 is provided with at least one vertical spindle 10, on which in a known manner a pin / slot tool 11 rotatably seated. With him the previously sawn end of the wood 9 is cross-profiled, for example, tapped or slotted or provided with a counter profile. The spindle 10 with the tool 11 may be adjustable in a known manner in the axial direction. In this case, sitting on the spindle 10 one above the other two or more tools with which the ends of the wood 3 can be processed in the desired manner. In addition, the spindle 10 may also be radially adjustable in order to adjust the spindle 10 to different diameters of the respective tool 11. The transverse profiling unit 1 can, as in the illustrated embodiment, be provided with a second spindle 10 for a further tool 11. This second spindle 10 is moved back and thus not in use. Instead of driving back this spindle 10, the clamping device 4 can be moved back by means of the carriage 5 'on the cross slide 5.

Subsequent to the spindle 10, the transverse profiling unit 1 is provided with at least one drilling and / or dowel unit 12. With her, the wood 3 can be provided following the Querprofiliervorgang with at least one bore and / or with at least one dowel.

The transverse profiling unit 1 can also have only the saw 8 and / or the spindle 10 and / or the unit 12.

The cross slide 5 is moved from the initial position shown in FIG. 1 along the guide 7 in the direction of arrow 13. The clamped wood 3 is sawed one after the other first with the saw 8 end, then cross-profiled and drilled and / or dowelled. Depending on the design of the machine, the cross slide 5 can be moved back to its original position in the transport direction 14 and the clamping device 4 are pivoted about the vertical axis 6, that in a renewed passage of the timber 3 by the Querprofiliereinheit 1 sawed the other end of the wood 3 and is cross-profiled. In this case, the wood 3 is first processed at both ends before being transferred to the Längsprofiliereinheit 2. Such a procedure is shown in FIG. The wood 3 is transported in the manner described twice by the Querprofiliereinheit 1 and this process both ends. Subsequently, the wood processed on both sides 3 of the Längsprofiliereinheit 2 is handed over, in which the timber 3 is longitudinally profiled in a manner to be described later.

When the cross slide 5 has reached the transfer position, the clamping device 4 is rotated so that the wood is parallel to the transport direction in the Längsprofiliereinheit 2. In this position, the wood can then be taken over by a feed unit 15 of the Längsprofiliereinheit 2. With her, the wood 3 is transported in its longitudinal direction by the Längsprofiliereinheit and thereby processed on its respective longitudinal side. The Längsprofiliereinheit 2 has seen in the machine of FIG. 1, in the transport direction of the timber 3, first drilling units 16 and at least one vertical spindle 17, on which at least one Längsprofilierwerkzeug 18 rotatably seated. In the illustrated embodiment, the Längsprofiliereinheit 2 provided with two spindles 17, on each of which at least one longitudinal profiling tool 18 is seated. With the drilling units 16 3 holes are made in the right in the transport direction longitudinal side and in the top and / or bottom of the wood. The Längsprofilierwerkzeug 18 profiled the right in the direction of transport longitudinal side of the wood 3. The Längsprofiliereinheit 2 may be equipped with other spindles. 1 shows, by way of example, a horizontal groove spindle 84 behind the second longitudinal profiling spindle 17.

Fig. 2 shows a first embodiment of the machine, in which the wood 3 is processed in the Querprofiliereinheit 1 in the manner described twice in succession at both ends. Subsequently, the wood 3 of the feed unit 15 is passed, which passes the wood to the drilling units 16 and the two Längsprofilierwerkzeugen 18 Längsprofiliereinheit 2. The Längsprofilierwerkzeuge 18 and the drilling units 16 are arranged so that the wood 3 is processed while passing on its right longitudinal side, as described above. Subsequent to the Längsprofilierwerkzeuge 18, the machine is provided with a second Längsprofiliereinheit 2 with further Längsprofilierwerkzeugen 18 and other drilling units 16. They are arranged so that the left longitudinal side is processed with them in the passage of the timber 3. As a result, only a single pass of the wood 3 through the Längsprofiliereinheiten 2 and thus through the whole machine is necessary. After processing both longitudinal sides, the wood 3 is fed by means of a transport device perpendicular to the transport direction 21 in the Längsprofiliereinheiten 2 another station or another magazine 24. This machine represents a continuous system in which the woods 3 are processed in a continuous process. The wood 3 is firmly clamped in the entire processing and at each time both in the transverse and in the Längsofofiliereinheiten 1, 2, so that an optimal processing quality and accuracy is achieved.

In a second embodiment of the machine according to FIG. 3, after being passed through the longitudinal profile unit 2, the processed wood 3 reaches a transverse conveyor 20 with which the wood is transported back to the transverse profiling unit 1. Two operations of such a machine will be described with reference to FIG. 3. In the first operation, the wood 3 is first transported in the transport direction 13 in the transverse profiling unit 1 in the manner described. With the circular saw blade 9 of the circular saw 8, the corresponding end of the wood 3 is sawn off and cross-profiled with the adjoining tool 11, for example, slotted or tapped. Subsequently, the wood 3 is drilled and / or dowelled with the drilling and / or dowel unit 12. Subsequently, the wood 3 is transferred to the feed unit 15 of the Längsprofiliereinheit 2. In the Längsprofiliereinheit the wood 3 is drilled with the drilling units 16 on its longitudinal side and at its top and / or bottom. Following this, the longitudinal side is longitudinally profiled with at least one of the two longitudinally profiled tools 18 spaced one behind the other. The processed at one end and on one longitudinal side of wood 3 then passes to the transverse conveyor 20, with which the wood is transported perpendicular to the transport direction 21 in the Längsprofiliereinheit 2 in the transport direction 22. The cross conveyor 20 transfers the wood 3 a transport device 23 which is parallel to the feed unit 15 and the wood 3 promotes back to Querprofiliereinheit 1. Here, the wood 3 is received by the clamping device 4 and aligned so that the other, not yet machined end of the wood sawed 3 with the saw 8, with the tool 11 cross-profiled, for example, slotted or tapped, and optionally with the drilling and / or dowel unit 12 is processed. The now processed at both ends of wood 3 is passed to the feed unit 15 of Längsprofiliereinheit 2 that the not yet processed longitudinal side of the wood 3 is passed to the drilling units 16 and the two Längsprofilierwerkzeugen 18. With the Drilling units 16, if necessary, this longitudinal side of the wood 3 drilled. With the following, about vertical axes rotatable tools 18, the timber 3 is longitudinal profiled.

In the second, preferred mode of operation, both ends of the wood 3 are first processed in the transverse profiling unit 1, wherein the cross-carriage 5 passes through the cross-profiling unit 1 twice in the manner described. Then, the processed at both ends of wood 3 of the feed unit 15 is passed, which is located in the transfer position shown in Fig. 1. The wood 3 is passed with the feed unit 15 to the drilling units 16 and the Längsprofilierwerkzeugen 18 and machined on one longitudinal side. With the cross conveyor 20 and the transport device 23, the wood 3 is returned to the cross-profiling unit 1 and received by the clamping device 4. With the cross slide 5, the wood 3 is transported without processing by the Querprofiliereinheit 1 and the feed unit 15 is transferred so that the wood 3 is processed during transport through the Längsprofiliereinheit 2 on the other longitudinal side.

While the wood from the cross conveyor 20 is conveyed to the transport device 23, the feed unit 15 moves back to the transfer position, so that they can take over this wood immediately.

The machine according to Fig. 3 represents a circular plant in which the wood is transported twice through the machine. After passing the wood 2 through the machine twice, the finished wood is either fed to the cross conveyor 20 for further processing. However, it is also possible to transfer the finished wood 3 to the transverse conveyor 20, which transfers the finished wood 3 of the transport device 23, which deposits the wood in a magazine 24 (FIG. 3).

In the Querprofiliereinheit 1 two woods can be processed simultaneously, as is apparent from Figs. 7 to 11. The woods 3 are with their long sides together and are clamped in the clamping device 4. It is designed as a clamping pliers and has a lower jaw 25 and an upper jaw 26. The woods 3 are stretched between the two jaws 25, 26. The jaws 25, 26 have flat bearing surfaces 27, 28, so that the woods can be reliably clamped. The upper jaw 26 is adjustable in height direction 29 (FIG. 8). The entire clamping device 4 is transverse to the axis of the woods 3, as described, adjustable in the direction of arrow 13.

The lower jaw 25 is provided at the free end with an upwardly directed stop 31, which prevents slipping of the woods 3 transversely to the jaws 25, 26 and ensures an exact alignment or position of the woods 3. The clamping jaw 25 is pivotable about a horizontal axis 32 transverse to its longitudinal direction. If the woods 3 are to be transferred in a manner to be described to the feed unit 15 of Längsprofiliereinheit 2, the jaw 25 can be pivoted about the axis 32 so far down into a release position that the stopper 31 is outside the path of movement of the woods 3 (Fig . 8th).

7 shows the initial position during the transfer of the woods 3 from the clamping device 4 of the transverse profiling unit 1 into the advancing unit 15 of the longitudinal profiling unit 2. The clamping device 4 and the advancing unit 15 are spaced from each other in this starting position. In the region between the clamping device 4 and the feed unit 15 is an intermediate clamping device 33 which has two superimposed clamping jaws 34, 35, of which at least one is adjustable in height direction. In addition, the entire intermediate clamping device 33 is adjustable in height direction. In the area below the intermediate clamping device 33 is a Transfer unit 36, which has two spaced-apart horizontal, endlessly circulating belts 37, 38. They are each mounted on a support 39, 40, of which at least one is adjustable in height direction. Thereby, the distance between the two bands 37, 38 are easily adapted to the thickness of the transported timber 3. The entire transfer unit 36 is also adjustable in height direction.

To transfer the woods 3 from the clamping device 4 to the feed unit 15, the clamping device 4 is initially adjusted in the adjustment direction 30 against the intermediate clamping device 33. The two jaws 34, 35 of the clamping device 33 are adjusted so that the woods 3 can reliably enter between the jaws 34, 35. The clamping device 33 is located in the area outside the adjustment path of the clamping device 4 and its jaws 25, 26. The clamping device 4 is adjusted so far until the woods 3 completely between the jaws 34, 35 of the clamping device 33 are (Fig. 8). Once the woods 3 are completely retracted between the jaws 34, 35, one of the jaws, in the embodiment, the upper jaw 34 is adjusted against the woods 3, which are thereby reliably clamped between the jaws 34, 35 of the clamping device 33 (Fig. 8) , Subsequently, the lower jaw 25 of the clamping device 4 is pivoted about the axis 32 so far down that the stop 31 of the jaw 25 in the area below the woods 3 is located. Now, the clamping device 4 can be moved back in the direction of arrow 41. This is done by appropriate retraction of the cross slide 5, on which the clamping device 4 is arranged.

During the transfer of the wood 3 from the clamping device 4 in the intermediate clamping device 33, the transfer unit 36 is still in its initial position in the area below the intermediate clamping device 33 (Fig. 8). As soon as the clamping device 4 moved back, the transfer unit 36 is moved to its transfer position shown in Fig. 9. For this purpose, it is necessary that the transfer unit 36 is first moved back so far in its lowered position in the direction of arrow 42 that during the subsequent adjustment of the transfer unit 36 in the vertical direction (arrow 43 in Fig. 8), the bands 37, 38 at the of the feed unit 15th turned away side of the intermediate clamping device 33 at the height of the woods 3 can be raised. The two bands 37, 38 in this case have such a distance from each other that during the subsequent adjustment of the transfer unit 36 in the direction of the intermediate clamping device 33, the woods 3 between the two bands 37, 38 reach (Fig. 9). The distance between the two bands is adjusted so that they do not touch the timbers 3 when adjusting the transfer unit 36 in the transfer position. Once the transfer position shown in Fig. 9 is reached, at least one of the carriers 39, 40 of the transfer unit 36 is adjusted so that the woods 3 of the bands 37, 38 can be detected.

Once the bands 37, 38 have been adjusted in this way, the jaws 34, 35 of the intermediate clamping device 33 can be opened and thus the woods are released. Subsequently, the transfer unit 36 moves back with the tensioned woods 3 in the direction of arrow 30 (FIG. 9) so far that the clamping jaws 34, 35 of the intermediate clamping device 33 are in the area outside the woods 3. Subsequently, the intermediate clamping device 33 is moved away downwards (FIG. 10).

As soon as the intermediate clamping device 33 is located in the region outside the woods 3, the transfer unit 36 approaches the arrow 30 (FIG. 9) close to the advancing unit 15. Subsequently, a slider-like transport unit 77 is moved in the conveying direction 44 (FIG. 10), which conveys the woods 3 into the feed unit 15 of the longitudinal profile unit 2. The endlessly circulating Ribbons 37, 38 of the transfer unit 36 are in this case on the woods 3 and are taken along when moving circumferentially. The bands 37, 38 serve to guide the woods 3 and prevent axial displacement during this transfer process. The conveying direction 44 (FIG. 10) of the woods 3 lies perpendicular to its longitudinal axis. The feed unit 15 has to be described in more detail over its length uniformly distributed clamping jaws, with which the woods 3 are clamped on a support 45. The displacement of the woods 3 in the adjustment 44 is limited by stops 46 which are distributed over the length of the feed unit 15 and where the woods 3 come to rest.

Since in the longitudinal profiling the woods 3 can not lie next to each other, as in the transverse profiling, initially only one wood 3 is transported into the advancing unit 15. As soon as the wood 3 comes to rest against the stops 46, the clamping jaws are moved downwards and this wood 3 is clamped in the feed unit 15. Subsequently, the feed unit 15 in the feed direction 21 (Fig. 2 and 3) is moved so far until the next wood 3 can be promoted in the same manner by means of the transport unit 77 in the feed unit 15 and clamped there. FIG. 11 shows the situation in which the feed unit 15 has advanced accordingly and has transported the second wood 3 into the feed unit 15.

After this second wood 3 has been clamped in the feed unit 15, the upper support 39 of the transfer unit 36 is moved upward, so that the transfer unit 36 can be moved back against the adjustment direction 42 (FIG. 8). Subsequently, the transfer unit 36 is lowered again, so that it is available for the next transfer clock. Are the wood to be machined 3 long, only one wood can be clamped in the feed unit 15 with the appropriate length. Then the sled must 5 wait in the transfer position until the feed unit 15 is moved back after the delivery of the longitudinally profiled wood 3 back into the transfer area.

Depending on the wood width, the tensioning device 4 of the cross-profiling unit 1 can accommodate only one wood 3 or even more than two woods. If the wood 3 is as wide as the clamping elements of the clamping device 4, then the clamping device 4 takes only a wood 3 and passes it after processing in the Querprofiliereinheit 1 in the manner described the feed unit 15. Have the woods 3 a comparatively small width, can be clamped in the clamping device 4 three or more woods 3 contiguous. Depending on the length of these woods 3 and the feed unit 15, they can be clamped one behind the other in the feed unit 15. If the length of the feed unit 15 is not sufficient to clamp all the woods 3 one behind the other in the feed unit 15, the transfer of the remaining woods 3 takes place when the feed unit 15 returns to its transfer position after processing the wood taken up by it in the longitudinal supply unit 2. Then the remaining woods 3 can be transferred to the feed unit 15 in the manner described.

As long as the woods 3 are still clamped in the intermediate clamping device 33, bores in the wood 3 are advantageously attached to the drilling unit 12 of the transverse profiling unit 1, if necessary. During this drilling operation, the clamping device 4 can return to the starting position for receiving the next workpieces.

The feed unit 15 will be explained in more detail with reference to FIGS. 4 to 6 and 14. It has a carrier 47, which extends advantageously over the length of the feed unit 15. The carrier 47 is provided with a vertical rear wall 48, on the distributed over the length guide elements 49 are attached. These guide elements 49 are arranged in two horizontal, spaced-apart rows (FIGS. 4, 5 and 14). With the guide elements 49, the feed unit 15 is seated on two mutually parallel guide rails 50, 51 (FIG. 14) which are provided on a machine frame (not shown).

The rear wall 48 of the carrier 47 passes at the upper end in a lying perpendicular to her support member 52. At least one drive 53 for clamping jaws 54 is fastened to its underside. The drive 53 advantageously has lifting cylinders 56 (FIG. 14), which are fastened to the underside of the horizontal supporting part 52 and from which a piston rod 57 protrudes downwards. It is connected at the lower end via a crosspiece 58 with an upwardly directed rod-shaped support 59 which projects through at least one guide 60 and a guide bushing 61 above the support member 52 and carries the respective clamping jaw 54 at the upper free end. In this way, all the jaws 54 are independently adjustable in the height direction by a respective lifting cylinder 56. Thus, the individual jaws 54 can be adjusted independently. It is also possible to group the clamping jaws 54 into groups and to adjust them in groups together.

On the support member 52 at least one rake-like carrier 62 is mounted, in which the stops 46 are mounted for the woods 3. The stops 46 are advantageously stop bolts, which project perpendicularly over the clamping jaws 54, 55 facing the top of the carrier 62 and under the force of at least one compression spring 63 are. These move the stops 46 axially in a stop position.

The clamping jaws 54 have in plan view (FIG. 6) a quadrangular base body 64 which has a rectangular projection 65 at its longitudinal edge on the side of its clamping. This causes the jaws 54 on both sides of the projection 65 with rectangular recesses 66, 67 provided. All jaws 54 are the same and are at a distance next to each other in a row. The jaws 54 are advantageously screwed onto the upper end of the carrier 59, so that they can be easily and quickly replaced if necessary.

The clamping jaws 54 lie in the vertical direction opposite the clamping jaws 55, whose upper sides 68 form the support 45 (FIG. 10) for the wood 3 to be clamped. The jaws 55 are at the same height and are advantageously also limited independently adjustable in height direction. But it is also possible to adjust the lower jaws 55 together or in groups in the height direction. The adjustment can be done via cylinder. But it is possible to adjust the jaws 55 via a CNC axis.
The clamping jaws 55 are, as can be seen from FIG. 6, arranged at a gap to the clamping jaws 54, seen in plan view of the feed unit 15. The lower jaws 55 have a T-shape with a rectangular foot 69, which lies in plan view between adjacent jaws 54. The lower clamping jaws 55 are also provided with a web 70 lying at right angles to the foot 69, which, seen in plan view, engages in the recesses 66, 67 of adjacent upper clamping jaws 54. Between the individual jaws 54, 55 there is a small space, seen in plan view. Thereby, the upper jaws 54 can be adjusted in a manner to be described below down between the lower jaws 55 properly and without risk of contact.

The lower jaws 55 project transversely from a foot 71 (FIG. 14) which connects the jaws 55 to a lift cylinder 72. With the lifting cylinders 72, the lower jaws 55 can be lowered in a manner to be described, if, as with reference to FIG. 7 to 11 has been explained, the woods 3 are passed after the cross-profiling of the feed unit 15. The lifting cylinders 72 are mounted on the carrier 47.

The rake-shaped carrier 62 has horizontal, spaced-apart fingers 73 (FIGS. 4 and 14) between which the rod-shaped carriers 59 for the upper jaws 54 and the feet 71 for the lower jaws 55 project. The carrier 62 is provided with spaced-apart upright supports 74 on which the compression springs 63 of the stops 31 are supported at one end. The rake-shaped support 62 can be adjusted horizontally in the direction of arrow 75 on the support part 52 of the carrier 47 in order to adapt the position of the stops 46 to the cross-sectional shape of the wood 3 to be clamped. The drive provided for this purpose is not shown. The adjustment of the rake-shaped carrier 62 can be done manually; Advantageously, however, it is adjusted controlled, so that an automatic adjustment of the stops 46 is ensured with respect to the cross-sectional shape of the wood to be processed 3.

The feed unit 15 may also have two or more adjacent carriers 62, which are advantageously independently adjustable in the manner described in order to clamp a plurality of woods in a row, which are to be processed with different widths.

As has been explained with reference to FIGS. 7 to 11, the woods 3 from the cross-profiling unit 1 are not transferred directly to the advancing unit 15 of the longitudinal profiling unit 2 but with the aid of the transfer unit 36. It is in relation to the transfer position (FIG. 9) arranged on the feed unit 15 that the belts 37, 38 of the transfer unit 36 only a small distance from the jaws 54, 55 of the feed unit 15 have. This allows the woods 3 easily from the transfer unit 36 in the feed unit 15 transport. In order to achieve a trouble-free and optimal transfer of the woods 3, the lower jaws 55 are slightly lowered so far before the transfer of the woods that the support side 68 of the lower jaws 55 is below the support level of the lower belt 38 of the transfer unit 36. Thereby, the wood 3 can be easily transported between the two jaws 54, 55 of the feed unit 15.

The stops 46 are adjusted by appropriate displacement of the rake-shaped carrier 62 in the direction of displacement 75 before the transfer of the woods 3 in the necessary position. The upper jaws 54 are slightly adjusted during the transfer, so that they do not hinder the transfer process. As soon as the woods 3 bear against the stops 46 distributed over the length of the feed unit, the upper and lower clamping jaws 54, 55 are moved together by actuating the corresponding lifting cylinders 56, 72. As a result, the woods 3 are optimally clamped between the clamping jaws 54, 55 of the feed unit 15. The clamping takes place in such a way that the longitudinal side of the woods 3 to be machined by the longitudinal profiling tools 18 is exposed, so that this longitudinal side can be processed without hindrance by the clamping jaws 54, 55. During longitudinal profiling, the feed unit 15 is reliably displaced along the guide rails 50, 51. Since the guide elements 49 are arranged distributed over the length of the carrier 47 and also mounted in two spaced apart with sufficient distance horizontal rows, the support 47 can be moved properly and without risk of Verkantens. This ensures a very accurate processing of the woods 3.

The feed unit 15 not only forms the transport device for the timbers in the Längsprofiliereinheit 2, but also at the same time the clamping device. As a result, the highly accurate machining of the woods 3 is also optimally ensured during the longitudinal profiling process.

As shown in FIG. 14, the longitudinal side of the woods 3 to be machined projects sufficiently far beyond the clamping jaws 54, 55 of the feed unit. As a result, the required processing can be made on this long side. Fig. 5 shows that on this longitudinal side of the wood 3, for example, two holes 76 in the longitudinal side and two holes 76 have been mounted in the top of the timber 3 with the drilling units 16. The drive of the feed unit 15 is designed as a CNC axis, so that the tensioned timber 3 can be moved exactly in the position for drilling. In the area in which the two holes 76 are mounted in the top of the wood 3, the corresponding upper jaw 54 of the feed unit 15 has been lowered. As a result, the wood 3 is exposed at this point, so that with the corresponding drilling unit 16, the holes can be mounted. Since the drive of the feed unit 15 is designed as a CNC axis, the corresponding jaws 54, which could interfere with the further processing of the timber 3 in Längsprofiliereinheit 2, before the transfer of the woods 3 in the feed unit under the support plane 68 of the lower jaws 55 are lowered by the corresponding lifting cylinder 56 is actuated. The clamped in the feed unit 15 wood 3 can then drive exactly relative to the machine-fixed drilling units 16, the locationally attach the necessary holes.

The transport unit 77 with which the timbers 3 are pushed from the transfer unit 36 into the advancing unit 15 in the described manner will be described with reference to FIGS. 12 and 13.

The transport unit 77 has a plate-shaped carrier 78, which has on its side facing the wood 3 spaced-apart Andruckbacken 79. The Andruckbacken 79 extend over the height of the carrier 78 and the wood 3. The front sides of the Andruckbacken 79 are rounded, so that they lie only linearly on the wood 3. The transport unit 77 is adjusted with a drive (not shown), preferably with lifting cylinders, in the direction of the stops 46 in the feed unit 15.

The transport unit 77 is located in the transfer area of the timbers 3 from the transverse to the longitudinal profile unit and is part of the transfer unit 36. The transport unit 77 is actuated when the timbers 3 are pushed between the open clamping jaws 54, 55 of the advancing unit 15. The jaws 54, 55 remain open until the wood 3 has been brought by means of the transport unit 77 to the stops 46 for conditioning. Then, the jaws 54, 55 of the feed unit 15 are actuated so that they clamp the wood 3. Only when this clamping operation is completed, the transport unit 77 is returned to its original position.

With the transport unit 77 slightly curved woods 3 can also be pressed straight over their length in order to be able to work even such woods properly despite their longitudinal curvature. If the curved timber 3 is brought into abutment with the transport unit 67 on the stops 46 of the feed unit 15 in the manner described, the transport unit 77 is moved further in the direction of the stops 46 by further pressurization. In this case, the wood 3 is straightened adjacent to the stops 46 (FIG. 13), so that it rests with its one longitudinal side against the stops 46. The transport unit 77 remains in its printing position according to FIG. 13 until the clamping jaws 54, 55 of the feed unit 15 have clamped the straight-pressed wood 3. The elasticity of the Jaws 54, 55 is so high that the wood 3 remains after returning the transport unit 77 in the feed unit 15 in its straight pressed position.

2 and 15 show the machine with two Längsprofiliereinheiten, which is thus equipped with two feed units 15. As shown in FIG. 15, these two feed units 15 are of the same design, but arranged in mirror image with respect to one another. Are the woods 3 clamped in the manner described in the right in Fig. 2 feed unit 15, then the woods are passed with her to the drilling units 16 and the Längsprofilierwerkzeugen 18, with which the right in the direction of transport 21 longitudinal side of the woods 3 is processed. The left-hand feed unit 15 in FIG. 2 is located in a transfer area 80 (FIG. 2) which is provided in the area between the duplicate drilling units 16 and longitudinal profiling tools 18. The two feed units 15 are arranged to one another, seen in the direction of transport 21 (Fig. 15), that their jaws 54, 55 have only a very small distance from each other. The woods 3 are clamped in a feed unit 15 so that they protrude sufficiently far beyond the jaws 54, 55 in the manner described. This supernatant is so large that the other feed unit 15 with its jaws 54, 55 can clamp the wood in this area.

Fig. 15 shows the machine from the outlet side. The right feed unit 15 has the wood 3 has passed past the corresponding tools in the Längsprofiliereinheit 2 that in Fig. 15, the left longitudinal side of the timber 3 has been profiled, which is in the direction of passage of the wood 3 through the machine, the right longitudinal side. When this feed unit 15 moves into the transfer area 80, the clamping jaws 54, 55 of the left-hand feed unit 15 in FIG. 15 are opened so far that the wood 3 with its projecting area passes unhindered between the jaws of this feed unit 15 can retract. The rake-shaped carrier 62 with the stops 46 is moved in the direction of the wood 3, that the stops 46 come to rest on him. Subsequently, the clamping jaws 54, 55 of this feed unit 15 are closed, thereby tensioning the wood 3 at the projecting area. Subsequently, the jaws 54, 55 of the right in Fig. 15 feed unit 15 can be opened so that this wood 3 is only stretched by the jaws 54, 55 of the left feed unit 15. The right feed unit 15 according to FIG. 15 can then travel back to take over the next woods 3 from the cross profiling unit 1 in the manner described. The left feed unit 15 in FIG. 15 now guides the tool 3 past the corresponding tools in such a way that the longitudinal side of the wood 3, which is on the right in FIG. 15, is profiled, which in the direction of passage of the wood 3 is the left longitudinal side.

The two feed units 15 are moved on opposite sides in the manner described on a frame part 81 with the guide rails 50, 51.

In another embodiment, not shown, the machine is provided with feed units 15 arranged one above the other in pairs, of which the upper feed units are arranged above a horizontal axis upwardly above the lower feed units 15. By such a design, the performance of the machine is increased because a feed unit can already go back to the respective transfer position, while the second feed unit passes the wood 3 at the respective Längsprofiliereinheit.

The longitudinal feed of the woods 3 in the Längsprofiliereinheit 2 by means of the feed unit 15 allows accurate tracking, surveying and positioning of the wood over the axes. Thereby are ensures high manufacturing precision and high process reliability. The milling and drilling operations are carried out in one machine, so that a complete machining of parts on the machine is possible. Since the woods 3 are always clamped during their transport through the transverse and the longitudinal profile unit 1, 2 and do not slip on table surfaces or attacks, the corresponding side of the woods is treated gently. Also, no chip rolling occurs. With the feed unit 15 and with the clamping device 4, it is possible to pass the woods 3 several times to the corresponding tools 11, 18 in order to carry out different operations on the wood 3. In this case, the respective spindles 10, 17 are each radially and / or axially adjusted in order to bring the necessary for the different operations cutting blade into engagement.

Since the woods 3 are firmly clamped during the entire processing and also during the various transfer procedures, the position of the woods 3 can be determined exactly at any time. This makes it possible to edit the woods 3 with this machine with high manufacturing precision. In particular, the holes and / or recesses can be attached to the machine-fixed drilling units 16 in the described manner in the longitudinal profile unit 2, since the timbers 3 with the feed units 15 can be positioned exactly relative to the drilling units 16.

Since the drive of the feed unit 15 is designed as a CNC axis, 3 dives can be made on the wood. This is to be understood as profilings which do not extend over the entire length of the wood 3. Due to the high positioning accuracy, the corresponding tools can be retracted exactly into the wood and moved out of it.

Since the feed unit 15 is moved CNC-controlled and also the tools 18 and their spindles 17 are CNC-controlled transversely to the direction of movement of the feed units 15 can be moved by interpolation from these two mutually perpendicular movements of the spindle 17 and the feed unit 15 any Contour of the long side of the woods can be achieved. So can be produced on the woods bends, wavy lines and the like without problems.

With the clamping device 4 and the feed unit 15 and very short woods 3 can be reliably processed. This eliminates complex special production.

The machine parts are constructed as modules, so that the machines can be put together in different ways. Thus, the construction of the machine is independent of its length, since with appropriate machine lengths a corresponding number of modules is put together. The modules can be assembled to the machine so that they can work as a right or left unit.

The magazine 24 (Fig. 1) may be formed so that it is automatically removed from the wood to be processed 3 and entered into the machine and returned after editing. The machine can operate without user assistance, because a high process security is guaranteed.

Since the woods 3 are not transported to a stop fitting through the machine, but each clamped by means of the clamping device 4 and the feed unit 15, a variable chip removal on wood 3 is easily controlled via the spindle position. This results in a high degree of flexibility and optimal use of raw wood.

The spindle guides are advantageously made of polymer concrete, whereby an optimal vibration decoupling of the spindles is achieved.

The spindles may, for example, have a length of 700 mm and a variable stroke of 650 mm. This gives a complete freedom in spindle occupation, i. the choice of tools to be mounted on the spindles. This makes it easy to configure the woodworking.

Since all the movements of the wood and tools are controlled by electrical axes, this results in high precision, great variability and a considerable simplification of the configuration. Since precise control of the position of the wood 3 within the machine is ensured at all times via the controlled axes, the light barriers used in conventional window machines can be omitted, which are often considerable sources of error of the known window machines. If the machine is designed as a continuous system according to FIG. 2, mechanisations of the machine can be dispensed with, such as return conveyors, pivoting devices and the like. For the positioning of the woods 3 a length stop is not required, resulting in very small length tolerances of the machined woods 3. Since the timbers are controlled via the electronic axes, at least in the machining phases, limit switches in the feed of the machine for tracking the woods can be omitted. Due to the controlled cycle of the machine is a buffer or magazine and their management is not necessary.

Since the wood 3 are transported in the transverse and in the longitudinal profiling each with the clamping device 4 and the feed unit 15, table tops are for supporting and supporting the woods not necessary anymore. The associated problems in terms of wear and interruption of the management of spindles thereby eliminated. Also, the existing on conventional window machines right stops can be omitted, which caused problems in terms of wear, the Einfräs- and Einstellarbeiten, the guide interruption in the field of spindles and with regard to an optimal chip detection.

The feed units used in the conventional window machines in the form of feed rollers and the associated problems eliminated. Feed rollers can wear out and become dirty, which impairs the transport of the timber through the window machine. In addition, the feed rollers must be adjusted. Due to the feed beam, the tools on the window machine are difficult to access. The position of the woods in the machine must be monitored in such a feed unit by limit switches, which can lead to problems.

If the woods are put together to form a window or door frame or wing, this frame or wing is then transported through the windowing machine and a milling is done. In these Umfräsarbeiten the feed bar is a hindrance. For the milling of small frames or wings, an additional milling trolley is required. In particular, such Umfräswagen are not useful for studio windows in which the frame parts partially at angles not equal to 90 ° join each other.

Such problems do not occur in the machine described, because the feed unit 15 can also be used during milling. As shown in FIG. 16, the frame 82 composed of the woods 3 machined in the machine is machined, in particular milled, on the outside of the frame parts. The frame 82 becomes with its one frame part 3 applied to the stops 46 of the feed unit 15 and clamped in the manner described with the jaws 54, 55. Since the further frame parts protrude perpendicularly from the clamped frame part 3, those clamping jaws 54 which lie in the region of these transversely projecting frame parts are lowered below the support plane 68 of the lower clamping jaws 55 (FIG. 14) before the frame 82 is clamped. The lowering of the corresponding clamping jaws 54 takes place program-controlled as a function of the frame 82 to be milled. Thus, the frame 82 can be easily inserted and tensioned into the feed unit 15. The lowered jaws 54 take the lying in their displacement travel stops 46 against the force of the compression springs 63. As shown in FIG. 6, the jaws 54 in the region of the base body 64 are so wide that they can simultaneously detect two stops 46 and press down.

Fig. 16 shows a sash 82 with a rung 83. With the feed unit 15, two or more adjacent frames 82 can be clamped to mill the outsides. The number of simultaneously clamped frame 82 depends on the length of the feed unit 15 and the length or width of the frame.

With the feed unit 15, the wood 3 is held during its transport through the machine, especially in the area of the respective tools. Thus, a left pressure, as provided in conventional window machines, omitted. Due to the fixed clamping in all feed or clamping devices arise on the wood 3 no impressions, grooves and the like.

With reference to the drawings, the machine has been described as an angle machine having the transverse and the Längssprofiliereinheit 1, 2, which are perpendicular to each other. The described feed unit 15 may also be provided in a machine that does not have a Querprofiliereinheit with which the woods 3 are thus processed only on at least one longitudinal side.

The machine according to FIGS. 17a to 17d is mainly used for the production of furniture parts and has no transverse profiling unit. The woods 3 are placed either by hand or a magazine on the feed unit 15 and clamped with the upper and lower jaws 54, 55. The woods 3 are in this case brought with their one end face on a machine-fixed stop 85 to the plant to obtain a length reference. Thus, the woods can be edited on their abutting stop 85 on the front side 86 in a manner to be described, the woods are on the jaws 54, 55 in the transport direction. Once the woods 3 aligned on the longitudinal stop 85 and clamped with the clamping jaws 54, 55, the stopper 85 is removed from its stop position and the feed unit 15 transported in the transport direction 21.

When transported in the transport direction 21, the woods 3 first pass into the working area of the tool 87, with which a corresponding processing on the end face 86 of the woods 3 is made. The tool 87 can be removed from a tool magazine 88, in which cutters, drills, angle units, saws, etc. can be arranged. The tool 87 is seated on a carriage 89 which can be moved transversely to the transport direction 21 and which can be moved along a guide 90 perpendicular to the transport direction 21 in the transport direction 91 between the tool magazine 88 and the processing station. After machining the end face 86, the wood 3 is transported with the feed unit 15 in the transport direction 21 on to a subsequent tool 92. It also sits on a carriage 93 which is perpendicular to the transport direction 21 between a further tool magazine 94 and its processing point along a guide 95 can be moved. The tool magazine 94 may be the same design as the tool magazine 88 and different tools for longitudinal processing, cross-processing, for drilling or sawing the woods 3 included. With the feed unit 15, the woods 3 are guided past the rotating tool 92, which processes the right in the direction of transport 21 longitudinal side of the woods 3.

If the longitudinal processing of the wood 3 is completed, the feed unit 15 is moved back against the transport direction 21 to the operator. After releasing the clamping device, it removes the wood 3 and turns it around its transverse axis by 180 ° (FIG. 17b). This turned wood 3 is again clamped between the jaws 54, 55 of the feed unit 15. The wood 3 is applied after the turning process with its machined end face 86 to the machine-fixed stopper 85, which can be adjusted in this case from the position shown in Fig. 17a in the position shown in FIG. 17b. But it is also possible to provide a second machine-fixed stop to align the partially processed wood 3. After clamping, the feed unit 15 is moved again in the transport direction 21. The tool 87 is used to machine the other end face 96 of the wood 3 (FIG. 17c). Thus, a trouble-free processing of this end face is possible, the wood 3 is clamped between the jaws 54, 55, that the wood 3 protrudes sufficiently far in the transport direction 21 via the feed unit 15. After machining the end face 96, the tool 87 is moved back transversely to the transport direction 21. The feed unit 15 is then moved further in the transport direction 21 and the wood 3 is guided past the tool 92, with which now the other longitudinal side of the wood 3 is processed. Once the longitudinal processing of the wood 3 is completed, the feed unit 15 is moved back to the starting position (FIG. 17d). The operator can then at the two opposite longitudinal sides and the two end faces 86, 96 processed wood 3 of the feed unit 15 refer (Fig. 17d).

In the method described, the wood 3 is moved twice through the machine by means of the feed unit 15, wherein at each pass an end face and a longitudinal side of the wood 3 is processed.

Fig. 18 shows an embodiment in which the wood 3 is machined in a single pass through the machine at both longitudinal sides and at both end faces. The wood to be processed is either manually by an operator or via a magazine on the clamping unit of the feed unit 15 abandoned. The wood is clamped between the jaws 54, 55 of the feed unit. The front in the transport direction 21 end of the wood 3 protrudes sufficiently far beyond the feed unit 15, so that with the tool 87, the end face 86 of the wood 3 can be edited. After this end face machining, the tool 87 is moved back by means of the carriage 89 and the feed unit 15 is moved further in the transport direction 21. The wood 3 then passes into the region of the tool 92, with which the right in the direction of transport 21 longitudinal side of the wood 3 is processed. According to the previous embodiment, the wood 3 protrudes sufficiently far beyond the clamping jaws 54, 55, so that this longitudinal side can be processed properly.

In the transport direction 21 behind the tool 92, the wood 3 is transferred to a second feed unit 15, which is arranged on the opposite side of the guide 97 for the two feed units 15 in mirror image. The wood 3 is transferred to the further feed unit 15 so that the wood 3 projects beyond its feed unit 15 with its end opposite to the transport direction 21. The further feed unit 15 has the jaws 54, 55, with which the wood is clamped at the top and bottom. The wood 3 is clamped in the transfer with the jaws 54, 55 of the further feed unit 15, as long as the jaws 54, 55 of the other feed unit 15 keep the wood 3 still tense, In this way, a perfect transfer of the wood 3 is guaranteed, as it is always looking forward to this transfer.

After transfer, the further feed unit 15 is moved further in the transport direction 21. With a tool 98, which is adjustable transversely to the transport direction 21 by means of a carriage 99, the left in the direction of transport 21 longitudinal side of the wood 3 is processed. With the following in the direction of transport 21 tool 100, which is also mounted on a carriage 101, then the rear in the transport direction 21 end face 96 of the wood 3 is processed.

After passing through the machine, the wood 3 is machined on both end faces 86, 96 and on the right and left longitudinal sides. The wood 3 is then removed from the feed unit 15 and continued perpendicular to the transport direction 21 after loosening the clamping device.

With this machine, the woods 3 by means of two feed units 15, which are advantageously the same design and arranged in mirror image to each other, processed at its two opposite longitudinal sides. This machine works very productively. As has been described with reference to the embodiments according to FIGS. 1 to 16, bores can also be produced in the other embodiments in the upper and lower sides of the woods 3.

As in the previous embodiment, the machine each has a magazine 88, 94 for the tools 86, 92. In this way, an aggregate is always in use, so that the machine has a high productivity or short throughput times. It is also possible to provide only one unit for the longitudinal and the transverse machining. Then, however, a non-productive time for changing the tools for the transverse and the longitudinal processing must be accepted.

According to the previous embodiment, the machine according to FIGS. 19a to 19e has two feed units 15, which are arranged on opposite sides of the guide 97 in mirror image of one another. Both feed units 15 are advantageously identical. The operator clamps the wood 3 to be processed into the feed unit 15, as has been explained with reference to FIG. 17. The feed unit 15 is then moved past in the transport direction 21 to the tools 87, 92, with which in the manner described in the transport direction 21 front end face 86 and the right in the direction of transport longitudinal side of the wood 3 are processed.

In the transport direction behind the tool 92 is the second feed unit 15, to which the wood 3 is transferred, as has been explained in detail with reference to FIG. 18 (FIG. 19c). With this second feed unit 15, the wood 3 is reversed opposite to the transport direction 21 along the guide 97. In this case, the wood 3 is machined on its other end face 96 and on the right in the transport direction of this second feed unit 15 longitudinal side with the tools 92, 87. After passing through the machine twice, the wood is thus processed on its two longitudinal sides and on its two end faces 86, 96. With the second feed unit 15, the wood 3 is moved back again after the second pass in the transport direction 21 (FIG. 19e), with the two tools 87, 92 being moved back. Then that will be done processed wood of the second feed unit 15 taken. Meanwhile, the operator can clamp the next wood 3 to be processed into the first feed unit 15.

FIGS. 20 and 21 show the possibility of reliably gripping wide, flat workpieces 3 with suction clamps in the feed unit 15. For this purpose, the upper jaws 54 are adjusted downwards (FIG. 20), so that all the clamping jaws 54, 55 are at the same height.

The clamping jaws 54 are provided on their support side with frame seals 102 (FIG. 20), which protrude beyond the lower clamping jaws 55 in the lowered position of the clamping jaws. In addition, the jaws 54 are each provided with at least one passage opening 103. The flat wood 3 (FIG. 21) is placed on the clamping jaws 54, 55, with the projecting frame seals 102 resting cleanly on the support side of the wood 3. Negative pressure is then generated via the openings 103, through which the flat wood 3 is pulled firmly against the clamping jaws 54, 55 and held reliably. The jaws 54 thus form Saugspanner, which are connected in a known manner to a suction system.

In the described embodiments, the upper and lower jaws 54, 55 are each arranged in a gap to each other. But it is also possible not all jaws 54, 55 to arrange gap, but only a part of these jaws. Thus, for example, the first upper and lower jaws 54, 55 lie exactly above each other, while only the subsequent jaws 54, 55 are in gap. By such a design, the wood 3 is stretched safely and stably in the region of its front side for the transverse processing. Even shorter woods 3 can be safely clamped by this.

Claims (34)

1. Apparatus for machining of workpieces (3) made out of wood, plastics or the like, with at least one longitudinal profiling unit (2) comprising at least one longitudinal profiling spindle, the length of which the workpiece (3) is travelling with at least one feed unit (15) and which comprises clamp jaws (54, 55),
   characterised in that the clamp jaws (54, 55) are disposed at the top of and on the bottom of the workpiece (3) in such manner, that at least part of the upper clamp jaws (54) is situated at gaps to the lower clamp jaws (55), seen as top view onto the feed unit (15), a small free space existing between the individual clamp jaws (54, 55), seen as top view.
2. Apparatus according to claim 1,
   characterised in that the feed unit (15) comprises upper and lower clamp jaws (54, 55), disposed respectively within a row.
3. Apparatus according to claim 1 or 2,
   characterised in that at least a part of the upper clamp jaws (54) of the feed unit (15) is adjustable with a drive (53).
4. Apparatus according to one of the claims 1 to 3,
   characterised in that the upper clamp jaws (54) of the feed unit (15) are separately adjustable.
5. Apparatus according to one of the claims 1 to 4,
   characterised in that the upper clamp jaws (54) are situated respectively on a support (59) connected with the drive (53).
6. Apparatus according to one of the claims 3 to 5,
   characterised in that the drive (53) comprises lift cylinders (56), by which the supports (59) of the upper clamp jaws (54) are adjustable.
7. Apparatus according to one of the claims 1 to 6,
   characterised in that the lower clamp jaws (55) of the feed unit (15) are displacable with at least one lift cylinder (72).
8. Apparatus according to one of the claims 1 to 7,
   characterised in that the clamp jaws (54, 55) of the feed unit (15), seen as top view, have a complementary contour.
9. Apparatus according to one of the claims 1 to 8,
   characterised in that the feed unit (15) is provided lengthwise with stops (46) which the workpiece (3) touches with its long side.
10. Apparatus according to claim 9,
    characterised in that the stops (46) are mounted in at least one support (62).
11. Apparatus according to claim 10,
    characterised in that the support (62) is adjustable transversely to the transport direction of the workpieces (3).
12. Apparatus according to claim 10 or 11,
    characterised in that the support (62) is formed rake-shaped.
13. Apparatus according to one of the claims 10 to 12,
    characterised in that the supports (59) for the upper clamp jaws (54) of the feed unit (15) project through the support (62) of the stops (46).
14. Apparatus according to one of the claims 1 to 13,
    characterised in that the feed unit (15) comprises at least one support (47), which is movable lengthwise along at least one guide (50, 51) as part of the apparatus.
15. Apparatus according to one of the claims 1 to 14,
    characterised in that the longitudinal profiling unit (2) comprises at least two feed units (15), placed mirror-inverted to one another.
16. Apparatus according to claim 15,
    characterised in that the feed units (15) comprise respectively upper and lower clamp jaws (54, 55).
17. Apparatus according to claim 16,
    characterised in that the clamp jaws (54, 55) are disposed at least partially with a gap to one another with a small free space between them, seen as top view.
18. Apparatus according to one of the claims 15 to 17,
    characterised in that the feed units (15) are juxtaposed to each other in the transport direction of the workpieces (3).
19. Apparatus according to one of the claims 16 to 18,
    characterised in that the clamp jaws (54, 55) of the feed units (15) are directed against each other.
20. Apparatus according to one of the claims 16 to 19,
    characterised in that the feed units (15) are juxtaposed within a transfer zone (80) within which the clamp jaws (54, 55) of the feed units (15) overlap the same workpiece (3).
21. Apparatus according to one of the claims 15 to 20,
    characterised in that the feed units (15) are guided at a common part of the frame (81) of the apparatus.
22. Apparatus according to one of the claims 1 to 21,
    characterised in that the drive of the feed unit (15) is performed as CNC-axis.
23. Apparatus according to one of the claims 1 to 22,
    characterised in that the feed unit (15) for clamping of broad workpieces (3) is provided with suction cups (54).
24. Apparatus according to one of the claims 1 to 23,
    characterised in that the upper clamp jaws (54) are part of suction cups.
25. Method for machining of workpieces (3) within an apparatus according to one of the claims 1 to 24, at which the workpieces (3) are clamped within at least one feed unit (15) and are transported together with it through the apparatus,
    characterised in that the workpieces (3) are clamped above and below within the feed unit (15) and are transferred between different machining operations, the workpieces (3) continuously clamped during the transfer.
26. Method according to claim 25,
    characterised in that the workpieces (3) are machined at at least one longitudinal side.
27. Method according to claim 26,
    characterised in that the workpieces (3) are drilled during machining of the long side at at least one stationary drilling unit (16).
28. Method for machining of workpieces (3) within an apparatus according to one of the claims 1 to 24, the workpieces (3) clamped in at least one feed unit (15) and transported together with it through the apparatus,
    characterised in that the workpieces (3) are clamped within the feed unit (15) above and below and machined during a first passage through the machine at one front end (86) and at one long side and during a second passage at the other front end (96) and at the other long side.
29. 29. Method according to claim 28,
    characterised in that the feed unit (15) is returned after the first passage to its initial position, the workpiece (3) taken off and, turned by 180°, is again clamped in the feed unit (15), which subsequently is driven once more through the apparatus.
30. Method for machining of workpieces (3) within an apparatus according to one of the claims 1 to 24, the workpieces (3) clamped in at least one feed unit (15) and transported with it through the apparatus,
    characterised in that the workpieces (3) are clamped in a first feed unit (15), that while transporting through the apparatus, the workpiece (3) is machined at its one long side or at its one front face (86) and its one long side, that subsequently the workpiece (3) is transferred to a second feed unit (15) with which the workpiece (3) is further transported through the apparatus, the workpiece (3) being machined at its other long side or at its other front face (96) and its other long side.
31. Method according to claim 30,
    characterised in that the workpiece (3) always remains solidly clamped during its transfer from the first to the second feed unit (15).
32. Method according to claim 30 or 31,
    characterised in that the workpiece (3) with the two feed units (15) is transported through the apparatus in the same direction.
33. Method according to claim 30 or 31,
    characterised in that the workpiece (3) is transported with the second feed unit (15) through the apparatus opposite to the first feed unit (15).
34. Method for the machining of workpieces (3) in an apparatus according to one of the claims 1 to 24, at which the workpieces (3) are clamped in at least one feed unit (15) and transported together with it through the apparatus,
    characterised in that the workpieces (3) are fixed in the feed unit (15) by suction cups.

Images