Sawing Facility And Method For Sawing A Sawing Material

Abstract

A sawing facility includes a rail guide, a saw arranged on the rail guide, a first carriage arranged on one side of the saw along the rail guide, and a second carriage arranged on the other side of the saw along the rail guide. The first carriage includes a first saw log support and a first carriage drive that can move the first carriage together with a first saw log on the rail guide and past the saw to saw the first saw log. The second carriage includes a second saw log support and a second carriage drive that can move the second carriage together with the second saw log on the rail guide and past the saw to saw the second saw log. The second saw log is loaded onto the second saw log support while the first saw log is sawed using the first carriage.

Claims

1. A sawing facility comprising: a rail guide having a first end and a second end, the rail guide defining a longitudinal direction from the first end to the second end; a saw arranged at a central area of the rail guide between the first end and the second end; a first saw log feeder arranged on a first side of the saw along the longitudinal direction; a second saw log feeder arranged on a second side of the saw opposite from the first side along the longitudinal direction; a first carriage arranged on the rail guide and configured to move along the rail guide back and forth, the first carriage comprising a first saw log support and a first carriage drive; and a second carriage arranged on the rail guide and configured to move along the rail guide back and forth, the second carriage comprising a second saw log support and a second carriage drive, wherein the first saw log feeder is configured to load a first saw log onto the first saw log support when the first carriage is moved to the first saw log feeder along the rail guide, wherein the second saw log feeder is configured to load a second saw log onto the second saw log support when the second carriage is moved to the second saw log feeder along the rail guide, wherein the first carriage drive is configured to move the first carriage together with the first saw log along the longitudinal direction past the saw in order to saw the first saw log along the longitudinal direction, wherein the second carriage drive is configured to move the second carriage together with the second saw log along the longitudinal direction past the saw in order to saw the second saw log along the longitudinal direction, and wherein the first and second carriage drives are configured to move the first and second carriages separately along the rail guide such that the first saw log is sawed using the saw while the second saw log is loaded onto the second saw log support and vice versa.

2. The sawing facility of claim 1, wherein the first saw log feeder is configured to load the first saw log onto the first saw log support in a feed direction defined transversely to the longitudinal direction.

3. The sawing facility of claim 1, wherein the first saw log feeder is arranged in a first feed area, the saw is arranged substantially centrally in a working area, and the second saw log feeder is arranged in a second feed area, and wherein the first and second feed areas adjoin the working area as viewed along the longitudinal direction.

4. The sawing facility of claim 3, wherein the first feed area and the second feed area do not overlap with the working area.

5. The sawing facility of claim 1, further comprising a first sawing product discharge configured to discharge a sawing product resulting from sawing the second saw log in a discharge direction transverse to the longitudinal direction.

6. The sawing facility of claim 5, wherein the first sawing product discharge is arranged on the first side of the saw along the longitudinal direction.

7. The sawing facility of claim 6, wherein the first sawing product discharge is arranged between the first saw log feeder and the saw.

8. The sawing facility of claim 6, further comprising a second sawing product discharge configured to discharge a sawing product resulting from sawing the first saw log.

9. The sawing facility of claim 8, wherein the second sawing product discharge is arranged on the second side of the saw along the longitudinal direction.

10. The sawing facility of claim 9, wherein the second sawing product discharge is arranged between the saw and the second saw log feeder.

11. The sawing facility of claim 8, wherein the second sawing product discharge is configured to discharge the sawing product resulting from sawing the first saw log transversely to the longitudinal direction.

12. The sawing facility of claim 5, wherein the first saw log feeder is configured to load the first saw log onto the first saw log support in a feed direction defined transversely to the longitudinal direction, and wherein the discharge direction is substantially opposite to the feed direction.

13. The sawing facility of claim 5, wherein the first sawing product discharge comprises a first basement discard chute configured to receive a slab produced during an initial sawing step of the second saw log.

14. The sawing facility of claim 1, further comprising a conveyor arranged at the saw, wherein the conveyor is configured to tilt about an axis of rotation extending parallel to the longitudinal direction.

15. The sawing facility of claim 1, wherein the saw comprises a band saw blade defining a sawing direction during sawing, and the sawing direction is oriented transversely to the longitudinal direction.

16. The sawing facility of claim 15, wherein the band saw blade has saw teeth on both sides as viewed along the longitudinal direction.

17. The sawing facility of claim 15, wherein the band saw blade is tilted by an angle with respect to a vertical direction.

18. The sawing facility of claim 1, wherein the first saw log feeder comprises a plurality of feeder steps such that the first saw log is conveyed stepwise onto the first saw log support.

19. The sawing facility of claim 1, wherein the first and second carriages are further configured to be coupled to one another for selective simultaneous travel on the rail guide when coupled.

20. A method of sawing a plurality of saw logs in a sawing facility, the sawing facility comprising a rail guide defining a longitudinal direction, a saw arranged at the rail guide, a first saw log feeder arranged on a first side of the saw along the longitudinal direction, a second saw log feeder arranged on a second side of the saw opposite from the first side along the longitudinal direction, a first carriage arranged on the rail guide and configured to move along the rail guide back and forth, and a second carriage arranged on the rail guide and configured to move along the rail guide back and forth, the first carriage comprising a first saw log support and a first carriage drive, the second carriage comprising a second saw log support and a second carriage drive, the method comprising: transferring a first saw log from the plurality of saw logs onto the first saw log support using the first saw log feeder; moving the first carriage together with the first saw log along the longitudinal direction past the saw, thereby sawing the first saw log along the longitudinal direction; transferring a second saw log from the plurality of saw logs onto the second saw log support using the second saw log feeder while the first saw log is sawed using the first carriage and the saw; and moving the second carriage together with the second saw log along the longitudinal direction past the saw, thereby sawing the second saw log along the longitudinal direction, when the sawing of the first saw log is interrupted or completed.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0071] Exemplary embodiments of the disclosure are shown in the drawings and are explained in more detail in the following description. Showing:

[0072] FIG. 1 is a schematic front view of an example sawing facility according to the principles of the present disclosure, with the sawing facility shown in a first processing position;

[0073] FIG. 2 is a schematic front view of the sawing facility of FIG. 1 shown in a second processing position;

[0074] FIG. 3 is a schematic front view of the sawing facility of FIG. 1 shown in a third processing position;

[0075] FIG. 4 is a schematic side view of an example saw log feed according to the principles of the present disclosure;

[0076] FIG. 5 is a schematic side view of an example saw log discharge according to the principles of the present disclosure; and

[0077] FIG. 6 is a schematic front view of a second example of a sawing facility according to the principles of the present disclosure.

DETAILED DESCRIPTION

[0078] FIG. 1 shows a first exemplary embodiment of a sawing facility according to the disclosure. The sawing facility is designated by reference numeral 100 in its entirety. In the present case, the sawing facility 100 is a band saw mill and comprises a band saw 10. In addition, the band saw mill 100 has a rail guide 12 by which a longitudinal direction 14 is defined. Viewed along the longitudinal direction 14, the band saw 10 is arranged in a central area of the rail guide 12 laterally adjacent to the rail guide, i.e., outside thereof. In other exemplary embodiments not shown, the sawing facility 100 may, for example, be a circular sawing facility.

[0079] The band sawing facility 100 further comprises a first saw log feeder 16 arranged upstream (in FIG. 1 on the left) of the band saw 10 laterally adjacent to and outside the rail guide 12. Furthermore, the band sawing facility 100 comprises a second saw log feeder 18 arranged downstream (in FIG. 1 on the right) of the band saw 10 laterally next to and outside the rail guide 12.

[0080] Further, the band sawing facility 100 comprises a first carriage 20. The first carriage 20 includes a first saw log support 22 and a first carriage drive 24. The first carriage drive 24 is integrated into the first carriage 20, for example, and may be configured as any type of motorized drive. In other advantageous exemplary embodiments, the first carriage drive 24 is arranged below the rail guide 12 or at an upstream or downstream end of the rail guide 12 and moves the first carriage via a cable pull. The first carriage 20 preferably has a number (e.g., two) of wheel axles (not shown) spaced apart from each other and aligned perpendicular to the rail guide 12, each having two pairs of running wheels 26, corresponding to the number of tensioning jacks on the carriage. By means of the pairs of running wheels 26, the first carriage 20 is guided on the rail guide 12.

[0081] The first saw log support 22 is configured to receive a first saw log 28. The first saw log 28 is, for example, a saw log in the form of a tree trunk. In FIG. 1, the first saw log 28 already lies on the first saw log support 22 and is fixed on the first saw log support 22 with the aid of two advantageous clamping blocks 30.

[0082] In order to change the position of the first saw log 28 on the first saw log support 22, for example to rotate it about the longitudinal direction 14 or to tilt it, it is preferred that the first carriage 20 comprises a turning and rotating mechanism, for example in the form of a saw log turner, which enables rapid rotation in both directions of rotation about the longitudinal direction 14.

[0083] The band sawing facility 100 further comprises a second carriage 32, which comprises a second saw log support 34 and a second carriage drive 36. The second saw log support 34 is configured to receive a second saw log 38 and to fix the latter, preferably via the clamping blocks 30, in a predetermined position on the second saw log support. The remaining features described with respect to the first carriage 20 apply in an analogous manner to the second carriage 32, without redundant explanation.

[0084] In FIG. 1, the second saw log feeder 18 is configured to transfer the second saw log 38 to the second saw log support 34. In the case of FIG. 1, the second saw log 38 is still arranged on the second saw log feeder 18, i.e., it has not yet been transferred to the second saw log support 34.

[0085] Both the first and the second saw log feeder 16, 18 preferably have one or a plurality of conveying techniques (for example roller conveyors, conveyor belts or cross-chain conveyors) by means of which the respective saw log 28, 38 can be transported both in the longitudinal direction 14 and in a transverse direction 40 extending transversely to the longitudinal direction 14 and can thus be fed to the respective saw log support 22, 34. In FIG. 1, a cross-chain conveyor 42 is indicated by way of example, by means of which the respective saw log 28, 38 can be conveyed in the transverse direction 40.

[0086] Furthermore, the band sawing facility 100 according to FIG. 1 comprises a first sawing product discharge 44, which is arranged upstream (in FIG. 1 on the left) of the band saw 10 when viewed from the band saw 10. Furthermore, the band sawing facility 100 comprises a second sawing product discharge 46, which is arranged downstream (in FIG. 1 on the right) of the band saw 10 when viewed from the band saw 10.

[0087] Both the first sawing product discharge 44 and the second sawing product discharge 46 are configured to discharge a sawing product 48 along the transverse direction 40, the sawing product 48 being formed by sawing the first and/or the second saw log 28, 38. However, the sawing product 48 is discharged along the transverse direction 40 in the opposite direction to the feed direction, i.e., away from the rail guide 12. An exemplary discharge of the sawing product 48 by the second sawing product discharge 46 is shown in FIG. 2. The produced sawing product 48 may, for example, be a board sawed off from the first and/or second cut material.

[0088] When viewed in the longitudinal direction 14, the band saw 100 can be divided into three distinct areas. Upstream of the band saw 10 (at the left outer edge of FIG. 1), a first feed area 50 is arranged in which the first saw log feeder 16 is arranged. The first feed area 50 extends in the downstream direction along the longitudinal direction 14 as far as the dimensioning of the first saw log feeder 16 requires.

[0089] Adjacent to the first feed area 50, but preferably not overlapping, is a working area 52. The working area 52 preferably extends both upstream and downstream of the band saw 10, with the band saw 10 being arranged substantially centrally in the working area 52. To the left and right (upstream and downstream) of the band saw 10 are arranged the first and second sawing product dischargers 44, 46 also within the working area 52. A second feed area 54, in which the second saw log feeder 18 is arranged, adjoins the downstream end of the working area 52 as shown on the right of FIG. 1.

[0090] In the case shown in FIG. 2, the band sawing facility 100 is shown in a second processing position in which the first carriage 20 has already passed the band saw 10 along the longitudinal direction 14 by means of the first carriage drive 24 with the first saw log 28 on the rail guide 12 and during this passing the first saw log 28 has already been sawed along the longitudinal direction 14. During this sawing, the sawing product 48 has been separated from the first saw log 28 and can thus be discharged via the second sawing product discharge 46 in the transverse direction 40. In the position of the first carriage 20 shown in FIG. 2, the first carriage 20 is about to be moved again in the upstream direction by the first carriage drive 24 in order to saw the first saw log 28 again along the longitudinal direction 14 when the first saw log 28 passes the band saw 10 again.

[0091] In FIG. 3, the band sawing facility 100 is shown in a third processing position in which the second carriage 32 has already been loaded with the second saw log 38 via the second saw log feeder 18 and the second saw log 38 thus rests on the second saw log support 34 and is preferably fixed thereon via the two clamping blocks 30.

[0092] During the initial processing step of the first and second saw logs 28, 38, it is usually customary to cut off a slab (a piece of wood that cannot be used economically). Depending on whether the first or the second saw log 28, 38 is initially sawn, the slab accumulates either upstream or downstream of the band saw 10 and is discharged from the further processing process at these respective points.

[0093] For discharging the sawing products, a first conveyor 56 belonging to the first sawing product discharge 44 is preferably configured to be moved in the transverse direction 40 in such a way that the resulting slab can fall into a basement opening (in the case of FIG. 3 into the sheet plane) in order to be discharged, the basement opening being called here a first basement discard chute 58 (see FIG. 4). Furthermore, downstream of the band saw 10, a second conveyor 60 belonging to the second sawing product discharge 46 is configured to be moved also in the transverse direction 40 in order to allow a slab resulting downstream to fall into an opening arranged below the second conveyor 60, the opening being referred to herein as a second basement discard chute 62 (see FIG. 4).

[0094] To ensure discharge of the slab into the first or second basement discard chutes 58, 62, respectively, upstream and downstream, a conveyor 64 is tiltable (upwardly, i.e., out of the sheet plane) about an axis of rotation 66 parallel to the longitudinal axis 14. The conveyor 64 is, for example, a roller conveyor or another conveyor arranged between the first and second sawing product dischargers 44, 46, more specifically between the first and second conveyors 56, 60, when viewed along the longitudinal direction 14. Viewed in the transverse direction 40, the conveyor 64 is arranged between a band saw blade 68 (see FIG. 5) and a band saw column 70. In FIG. 3, the conveyor 64 is a roller conveyor.

[0095] FIG. 4 shows a schematic view of the first or second saw log feeder 16, 18. As can be seen, the first or second saw log 28, 38 is conveyed by means of the saw log feeder 16, 18 stepwise onto the first or second saw log support 22, 34. In the case shown in FIG. 4, a saw log 28, 38 is already on the saw log support 22, 34. In addition, it is schematically shown in FIG. 4 that by means of the saw log feeder 16, 18, saw logs having various width dimensions can be conveyed through the saw log feeder 16, 18 onto this saw log support 22, 34.

[0096] In FIG. 4, it is further shown that the feed of the saw log 28, 38 is preferably monitored and/or controlled by measurement technology, wherein in FIG. 4 an optical sensor system 72 is arranged above the saw log support 22, 34. The optical sensor system 72 can preferably be in the form of a camera which communicates with a controller (not shown) in such a way that the feed of the saw log 28, 38 can be controlled via the images captured by the camera 72. In addition, FIG. 4 schematically shows the first and second basement discard chutes 58, 62, respectively.

[0097] FIG. 5 shows a schematic view of the first and second sawing product discharge 44, 46, respectively. Both the sawing process and the saw log feeder and discharge are preferably monitored (audio-)visually by an operator 74 sitting in a driver's cab 76 in order to detect disturbance and faults in the band sawing facility 100 as early as possible. In FIG. 5, it can be seen that preferably both the band saw 10 or the band saw blade 68 and the first and second saw log supports 22, 34 are each tilted by an angle α of 17° with respect to a vertical direction 78, by way of example, since such an angle has proven to be particularly advantageous. The band saw blade 68 is further clamped between two spaced band saw rollers (not shown) and rotates about them, thereby defining a sawing direction 79.

[0098] FIG. 6 shows a second exemplary embodiment of the band sawing facility 100. In this exemplary embodiment, the first and second carriages 20, 32 are coupled to each other via a coupling 80 in such a way that the first and second saw log supports 22, 34 can preferably be used synergistically for supporting an overlong saw log 82 without having to use a carriage with larger dimensions as a substitute. The coupling 80 between the first and second carriages 20, 32 is preferably mechanical (via catch hooks), (electro-)magnetic or virtual.

[0099] By way of example, in the case of virtual coupling, it is possible for the first and second carriage drives 24, 36 to be coordinated with each other in such a way that the first and second carriages 20, 32 move directly behind each other at a predefined distance, whereby the master-slave principle, for example, is suitable for this type of control. Here, for example, the second carriage 32 as master can control the movement of the first carriage 20 via a coupling of the two drive controls.

[0100] In the case shown in FIG. 6, both the saw log feeder and the sawing product discharge are designed with increased dimensions according to the dimensions of the extra-long saw log 82.