CA2019278C - Apparatus for dividing workpieces, especially wood - Google Patents
Apparatus for dividing workpieces, especially wood Download PDFInfo
- Publication number
- CA2019278C CA2019278C CA 2019278 CA2019278A CA2019278C CA 2019278 C CA2019278 C CA 2019278C CA 2019278 CA2019278 CA 2019278 CA 2019278 A CA2019278 A CA 2019278A CA 2019278 C CA2019278 C CA 2019278C
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- CA
- Canada
- Prior art keywords
- dividing
- monitor
- workpiece
- tool
- line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B1/00—Methods for subdividing trunks or logs essentially involving sawing
- B27B1/007—Methods for subdividing trunks or logs essentially involving sawing taking into account geometric properties of the trunks or logs to be sawn, e.g. curvature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B31/00—Arrangements for conveying, loading, turning, adjusting, or discharging the log or timber, specially designed for saw mills or sawing machines
- B27B31/06—Adjusting equipment, e.g. using optical projection
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/525—Operation controlled by detector means responsive to work
- Y10T83/536—Movement of work controlled
Abstract
A television camera (4) is provided in the region of a band saw (1) so that, in the latter, the wood (7), firmly placed on a band saw carriage (2) to be adjustable transversely to the dividing plane (6') of the band saw (1), can be aligned with respect to the band saw (1). An image of the end face of the wood (7) to be divided which faces the band saw (1) is produced on a television screen (5). A line (6) symbolizing the plane (6') wherein the band saw (1) operates is provided on the television screen (5). In this way, it is possible to determine from the television screen (5) whether the wood (7) is correctly aligned with respect to the band saw (1) and/or to observe the aligning of the wood (7).
Description
_ 1 _ 'the invention relates to an apparatus for dividing workpieces, especially wood, wherein a tool for dividing the workpiece, for example a band saw or a frame saw, and the workpiece are movable relatively to each other along a predetermined travel route for p~rformzng the dividing work, and wherein 'the workpiece is fixed on a support to be adjustable transversely to the dividing plane, with an image recorder covering the workpiece, preferably a television camera.
The setting up of round timber or other work-pieces to be split up by a dividing means, particularly in the longitudinal directian, with respect ~to the divid-ing tool (band saw, frame saw, or the like), which is important for optimum guidance of the dividing plane (cutting plane), especially in sawmill~operation, is ~xaeuted, if auxiliary means are at all provided for this purpose, with the aid of light beams (shadows) or with the help of a laser beam.
The setting up of round timber or other work-pieces to be split up by a dividing means, particularly in the longitudinal directian, with respect ~to the divid-ing tool (band saw, frame saw, or the like), which is important for optimum guidance of the dividing plane (cutting plane), especially in sawmill~operation, is ~xaeuted, if auxiliary means are at all provided for this purpose, with the aid of light beams (shadows) or with the help of a laser beam.
2 _ These convent~.onal measures have the drawback that the work place must always be in darkness since light beams (shadows) or laser beams can hardly be seen, or cannot be seen at all, in sunlight and/or daylight. Recognition is practically not possible at all if wood in its bark is to be split up. When using a laser beam for setting up purposes, -the cutting plane can be indicated anly at a relatively short range (4 - 6 m).
Another disadvantage in the conventional measures resides in that the operator must constantly watch the wood or other workpiece to be divided, requiring continuous head movements which are very tiring.
A further drawback of the known measures resides in that adjustment of the workpiece to be split ,. with the aid of a laser beam requires a very expensive arrangement.
Ntoreover, the operator must be in the im~-mediate vicp.nity of the workpiece (wood) to be divided in order to be able at all to perform setting up (adjustment) of the workpiece to be divided.
a DE--A-2,70,985 discloses a device for the measurement, setting, and feeding of tree trunks to~a frame saw.
In this conventional device, -three television cameras are mounted so that they cover the tree trunk,to be fed -to the frame saw, from above and transmit data corresponding to its outer contour to a computer;
the latter controls a turning means for the tree trunk resting on the trunk carriages, which is linked to the carriages, in such, a way that the log is maximally favorably aligned with .regard to 'the cutting plane.
A similar apparatus is set forth in U.S.
Patent A-4,458,567 wherein two cameras are arranged laterally above a log; the log is to be oriented in such a way that the images of contours detected by the cameras are essentially mirror images of one another.
Neither the cameras provided in the device according to DE-A-2,740,985 nor those in the device in accordance with U.S. A-4,458,567 cover the end face of the workpiece to be divided, but rather detect merely its longitudinal sides so that it is merely possible with the known devices to turn logs to be split up into ' the position favorable for performing a dividing cut.
vThe conventional devices, thpugh, involve comparatively ., complicated installations utilizing computers which i 20 control the necessary turning movements of the log.
The invention is based on the object of indicating an apparatus of the above-discussed type which operates in a simple and reliable fashion and does not exhibit the above-enumerated disadvantages.
~~.,~~~
This has been accomplished in accordance with this invention in 'that the image recorder, detecting at least the end face of the workpiece to be split up, is mounted in the dividing plane of the dividing tool or, respectively, in case of a dividing tool with several dividing planes, in one of its dividing planes;
that 'the image recorder is connected with a monitor, preferably a television screen, on which there is pro-duced an image of at least the end face of the workpiece to be divided which faces the dividing tool and the image recorder; and that at least one line symbolizing the plane in which the dividing tool is effective is provided on the monitor:
When working with the apparatus according to 1~ this invention, the operator can observe from the monitor how the workpiece is to be adjusted with respect to the dividing tool for optimum alignment of the dividing plane. Thus, it is no longer necessary for the operator to see the wor~tpiece proper and the light or laser marker produced thereon. Consequently, work can be performed with 'the apparatus of this invention even over relatively long distances, i.e. the operator need no longer be stationed in the immediate vicinity of the workpiece but rather can also work in other rooms or departments.
_ 5 _ In a preferred embodiment, the provision is made that the image recorder is a television camera, it being recommended that the monitor is a television screen.
The apparatus of this invention is not limited to a specific splitting tool bu-t rather the provision can be made that the splitting tool is a band saw or that the splitting tool acts in several planes, for example being a frame saw, and that the screen displays lines symbolizing the various dividing planes, partic-ularly the planes wherein the saws of the frame saw are active. The apparatus according to the invention can also be utilized in conjunction with a circular saw or a finishing circular saw.
In one embodiment of an apparatus according to this invention, the provision can be made that additionally at least one further line is provided on the monitor, adjustable transversely to the line symbolizing the dividing plane, and that the further line can be set at a distance from the line symboliz-ing the f~.r5t dividing plane which distance corresponds to the distance of a second dividing plane from the first dividing plane. This embodiment offers the operator the possibility of setting up the cutting guide as early as during the first cut sa that also the second cut can be optimally guided, if a workpiece having a specific width is to be produced. Moreover, this embodiment offers the possibility of recognizing whether the desired workpiece can at all be made from the workpiece to be divided. This embodiment can also be utilized for making a V--type cut and, respectively, for the machining of wood according to specifications.
In a preferred embodiment of the invewtion, the provision is made that the monitor is arranged at the control desk of the apparatus in a position wherein it can be observed by the operator sitting at this desk.
Tn an advantageous embodiment of the inven-tian, the provision is made that the lines) is (are) represented by a (rubber) string or a rod attached to the monitor at the housing of the latter. Alternatively, it is possible that the at least one line is a line electronically generated on the monitor. The line on the monitor can also be a line written on the monitor by means of a pen (e. g. oCR signer.
rn one embodiment, the provision can be made .. that the outer contour of the cross section of the new workpiece, or several of such workpieces, to be produced by splitting from the workpiece, is reproduced on the monitor. This embodiment is especially useful in connection with an embodimewt wherein at least two lines are located on the monitor, of which at least one is adjustable.
~~~.~ ~~~'l~
Another embodiment of this invention provides that the image recorder and/or the camera is mounted at the dividing tool and/or to the frame thereof at a level lying above that of the workpiece to be split up.
This results in an especially satisfactory overview advantageous, in particular, for the machining of conical workpieces (wooden logs).
A practical embodiment of the invention resides in that the at least one line symbolizing -the dividing plane on the monitor can be shifted, for adjusting the apparatus, into a position coinciding with the image of the cutting plane on the monitor.
Advantageously, the feature is provided accord-r ing to this invention that the dividing tool is fixedly arranged and the warkpiece is movable on a conveyor carriage relatively to the dividing tool:
Additional details and features of the inven-tion and he mode of operation yith the aid of the apparatus of this invention can be seen from the following description of the embod3.ments illustrated in the drawings wherein: ' Figure 1 shows -the apparatus in a top view, Figure 2 shows the apparatus from the side, Figure 3 is a schematic view of a monitor an the switching desk, Figures 4-11 show various possibilities of locating lines on the monitar, and Figures 12 and 13 are circuit diagrams of embodiments of the apparatus according to the invention.
In the embodiment illustrated in Figures 1 and 2, the dividing apparatus is a band saw 1 and the workpiece 7 to be divided, round timber, is fixedly disposed on a band saw carriage 2. The band saw car-riage 2 can be adjusted in the direction of double 10~ arrow ll sothat the workpiece 7 can be aligned with respect to the band saw 1. In order to perform the splitting work,.the workpa:ece 7 is moved on 'the hand n saw carriage 2 toward the band saw 1 in the direction of double arrow 10.
; Beside the frame of the band saw 1 and in the , proximity thereof; a camera 4 is adjustably mounted in the cutting plane as an image recording unit. The camera 4 is not to toucl~a the dividing tool or a part thereof since this would result in interfering i 20 vibrations.
_ g In opposition to the operator at the control desk 3, a monitor 5 is set up which, in case the camera 4 is designed as a television camera, is made to be a television screen.
Tt can be seen from the illustration of Figure 2 that the camera 4 is arranged in the pro~cimity of the band saw 1 in such a way 'that it looks on the workpiece ? obliquely from above, i.e. that it is mounted at a level lying above the workpiece 7 to be split up, so thab the viewing angle 9 encompasses the entire workpiece and the band~saw carriage 2 movable on tracks 8.
Figure 3 shows the image of the band saw car-riage 2 and of the workpiece 7 (round timber) produced on the monitor 5.
Lt can furthermore be seen fram Figure 3 -that a line 6 is provided on the monitor 5. The line 6 can be a simple rod adjustably arranged at the monitor 5, or also a rubber band or a line produced an the screen with a pen. However, it is preferred that the line 6 is produced in the monitor 5 electronically.
The line 6 symbolizes the plane 6' (Figure 1) in which the band saw 1 is effective. The line 6 is adjustable on the manitor 5 so that, in case of remounting of the camera 4 and/or of the band saw 1, the line 6 can be correspondingly aligned in the dividing plane 6°.
-- to -Figure 4 once again shows the image on the monitor 5 in a schematic view. Tt can be seen that, by adjusting the band saw carriage 2 in the direction of double arrow 11, the cutting plane 6', symbolized by the line 6 on the manitor 5, can be aligned with.
respect 'to the workpiece ? to be divided so that optimum guidance of the cut is achieved. this is of importance, for example, for the first-time working of round timber in order to remove slabs therefrom since unnecessary waste (slabs which are too thick) should be avoided.
In the embodiment shown in Figure 5, a further fine 12 is provided xn addition to line ~ on the moni-for 5; this further line is adjustable (double arrow 13) mechanically or in the scanning field of the monitor with the aid of a program provided for this purpose.
The spacing of line 12 from the zero line 6 can be set, for example, to the distance corresponding to the width of a workpiece to be made from the work-piece 7. This embodiment is especially suited for a V-cut and, respectively, far the dividing of lags into wood according to a specification. -Figure 5, finally, shows an embodiment with a zero line 6 and several movable lines 15. This embodiment is preferably employed far frame saws.
._ , Figure 6 also indicates that it is possible to generate on the monitor 5 an image symbolizing the outer contour of the workpiece to be manufactured, this being a rectangle in the illustrated embodiment, so that the operator can determine, from 'the monitor 5, whether it is at all possible to produce this workpiece from the workpiece blank 7. :Lf the answer is in the positive, after checking the moni-for 5, then the work--piece 7 can be aligned, for example by adjusting the band saw carriage 2 in the direction of double arrow 11, with respect to the zero line 5 in such a way that a maximally advantageous cutting guidance is ensured for the first cut. and the subsequent cuts.
Figures 7--11 show schematically monitors with images as they are obtained in case the camera 4 is arranged. as shown in Figure 2, above the workpiece (e. g. the log 7) to be divided.
The illustration of Figure 7 first of all shows the two lines 6 and 12 (as in Figure 5) and their align-ment lines 6° and 12', respectively. In the example of Figure 7, the spacing between the zero line ~ and the adjustable line 12 is set at '°20.0 cm", this value being displayed at 16 on the monitor. The alignment lines 6° and 12' emanate from points 17, 18 wherein the lines 6 and 12 intersect witkr'the outer contour of the log '~ at the top.
12 _ ~. ,.~ s~s ~n7hile Figure 7 shows the alignment of a "band saw, left", Figure 8 shows the analogous case for a "band saw, right'° .
Figures 9-11 show illustrations correspond-s ing analogously to Figure 7, produced with the use of frame saws (Figure 9), double-band saws and frame saws (Figure 10), and, respectively, in case o~
circular trimming saws (Figure 11) when the camera 4 is arranged above the.workpiece.
The camera 4 can also be equipped with a zoom lens. This~embodiment makes it possible in each case to vary (readjust? the zopm setting (optionally automaticallyD so that the dimension (e.g. the diameter) a~ the workpiece 7 is in all instances displayed on the screen 5 with identical size, independently o~ the distance from the lens of camera 4.
Examples far the design o~ the electronic section o~ the apparatus o~ this invention are il--lustra~ted in Figures l2 and l3. These will be explained hereinbelow:
In Figure l2, a microprocessor unit 31 accepts data from the PC or central computer 39 regarding a cutting site 38 and controls, by way of a driver stage 32, the motor 34 for the zoom adjust-meat of the zoom lens 30 of camera 4. The motor 34 is, for example, a DC synchronous motor or a stepping motor.
The actual value return signal to the micro-processor unit is transmitted via the generator 33 which can be a potentiometer, a pulse generator, or the like.
The actual value return signal is corrected by way of a corresponding functional curve (zoom ratio =
function of the position return signal.D and compared to the desired value (from PC or central computer) and readjusted.
In the image storage unit 35, the data far diverse linear or punctiform markers, as well as alphanumerical symbols (for display in the monitor) are stored and~or deposited.
The address counter 36 serves for readout from the image storage unit for indication on the monitor 5 via the D/A converter 37'.
An analog-to-digital converter 37' that may be included in certain cases'serves for object recognition, measurement, selective zoom adjustment, ~.nd so forth.
In case of Figure 13, intended especially for the division of panels and similar workpieces, the control 40 is utilized in order to control the movements of two separating units 41 and 42 by way of their drive mechanisms 43 and 44. Similar drive mechanisms are provided for the two separating _ 14 _ units (not shownD acting in directions perpendicular to the separating units 41, 42, the cwtting planes of which are symbolized by the lines 45, 47. The position of the lines 45, 46, 47 and 48 on the monitor 5 is adjusted to the desired position with the aid of the keyboard 49, with observation of the monitor 5 on which an image 7' of the workpiece 7 is displayed.
The thus-given desired values are transmitted via the ,.
control unit 54 by way of a positional control unit 5 to the adjustment drive units~43, 44 of the separating devices 41, 42 and thus the separating devices 41 ,42 are readjusted by follow-up.
If the apparatus of this invention is . used in frame saws or similar dividing Coals generating a large amount of dust and wood fragments during opera--tion, it is recommended to mount the camera 4 at a distance from the dividing tool.
Another disadvantage in the conventional measures resides in that the operator must constantly watch the wood or other workpiece to be divided, requiring continuous head movements which are very tiring.
A further drawback of the known measures resides in that adjustment of the workpiece to be split ,. with the aid of a laser beam requires a very expensive arrangement.
Ntoreover, the operator must be in the im~-mediate vicp.nity of the workpiece (wood) to be divided in order to be able at all to perform setting up (adjustment) of the workpiece to be divided.
a DE--A-2,70,985 discloses a device for the measurement, setting, and feeding of tree trunks to~a frame saw.
In this conventional device, -three television cameras are mounted so that they cover the tree trunk,to be fed -to the frame saw, from above and transmit data corresponding to its outer contour to a computer;
the latter controls a turning means for the tree trunk resting on the trunk carriages, which is linked to the carriages, in such, a way that the log is maximally favorably aligned with .regard to 'the cutting plane.
A similar apparatus is set forth in U.S.
Patent A-4,458,567 wherein two cameras are arranged laterally above a log; the log is to be oriented in such a way that the images of contours detected by the cameras are essentially mirror images of one another.
Neither the cameras provided in the device according to DE-A-2,740,985 nor those in the device in accordance with U.S. A-4,458,567 cover the end face of the workpiece to be divided, but rather detect merely its longitudinal sides so that it is merely possible with the known devices to turn logs to be split up into ' the position favorable for performing a dividing cut.
vThe conventional devices, thpugh, involve comparatively ., complicated installations utilizing computers which i 20 control the necessary turning movements of the log.
The invention is based on the object of indicating an apparatus of the above-discussed type which operates in a simple and reliable fashion and does not exhibit the above-enumerated disadvantages.
~~.,~~~
This has been accomplished in accordance with this invention in 'that the image recorder, detecting at least the end face of the workpiece to be split up, is mounted in the dividing plane of the dividing tool or, respectively, in case of a dividing tool with several dividing planes, in one of its dividing planes;
that 'the image recorder is connected with a monitor, preferably a television screen, on which there is pro-duced an image of at least the end face of the workpiece to be divided which faces the dividing tool and the image recorder; and that at least one line symbolizing the plane in which the dividing tool is effective is provided on the monitor:
When working with the apparatus according to 1~ this invention, the operator can observe from the monitor how the workpiece is to be adjusted with respect to the dividing tool for optimum alignment of the dividing plane. Thus, it is no longer necessary for the operator to see the wor~tpiece proper and the light or laser marker produced thereon. Consequently, work can be performed with 'the apparatus of this invention even over relatively long distances, i.e. the operator need no longer be stationed in the immediate vicinity of the workpiece but rather can also work in other rooms or departments.
_ 5 _ In a preferred embodiment, the provision is made that the image recorder is a television camera, it being recommended that the monitor is a television screen.
The apparatus of this invention is not limited to a specific splitting tool bu-t rather the provision can be made that the splitting tool is a band saw or that the splitting tool acts in several planes, for example being a frame saw, and that the screen displays lines symbolizing the various dividing planes, partic-ularly the planes wherein the saws of the frame saw are active. The apparatus according to the invention can also be utilized in conjunction with a circular saw or a finishing circular saw.
In one embodiment of an apparatus according to this invention, the provision can be made that additionally at least one further line is provided on the monitor, adjustable transversely to the line symbolizing the dividing plane, and that the further line can be set at a distance from the line symboliz-ing the f~.r5t dividing plane which distance corresponds to the distance of a second dividing plane from the first dividing plane. This embodiment offers the operator the possibility of setting up the cutting guide as early as during the first cut sa that also the second cut can be optimally guided, if a workpiece having a specific width is to be produced. Moreover, this embodiment offers the possibility of recognizing whether the desired workpiece can at all be made from the workpiece to be divided. This embodiment can also be utilized for making a V--type cut and, respectively, for the machining of wood according to specifications.
In a preferred embodiment of the invewtion, the provision is made that the monitor is arranged at the control desk of the apparatus in a position wherein it can be observed by the operator sitting at this desk.
Tn an advantageous embodiment of the inven-tian, the provision is made that the lines) is (are) represented by a (rubber) string or a rod attached to the monitor at the housing of the latter. Alternatively, it is possible that the at least one line is a line electronically generated on the monitor. The line on the monitor can also be a line written on the monitor by means of a pen (e. g. oCR signer.
rn one embodiment, the provision can be made .. that the outer contour of the cross section of the new workpiece, or several of such workpieces, to be produced by splitting from the workpiece, is reproduced on the monitor. This embodiment is especially useful in connection with an embodimewt wherein at least two lines are located on the monitor, of which at least one is adjustable.
~~~.~ ~~~'l~
Another embodiment of this invention provides that the image recorder and/or the camera is mounted at the dividing tool and/or to the frame thereof at a level lying above that of the workpiece to be split up.
This results in an especially satisfactory overview advantageous, in particular, for the machining of conical workpieces (wooden logs).
A practical embodiment of the invention resides in that the at least one line symbolizing -the dividing plane on the monitor can be shifted, for adjusting the apparatus, into a position coinciding with the image of the cutting plane on the monitor.
Advantageously, the feature is provided accord-r ing to this invention that the dividing tool is fixedly arranged and the warkpiece is movable on a conveyor carriage relatively to the dividing tool:
Additional details and features of the inven-tion and he mode of operation yith the aid of the apparatus of this invention can be seen from the following description of the embod3.ments illustrated in the drawings wherein: ' Figure 1 shows -the apparatus in a top view, Figure 2 shows the apparatus from the side, Figure 3 is a schematic view of a monitor an the switching desk, Figures 4-11 show various possibilities of locating lines on the monitar, and Figures 12 and 13 are circuit diagrams of embodiments of the apparatus according to the invention.
In the embodiment illustrated in Figures 1 and 2, the dividing apparatus is a band saw 1 and the workpiece 7 to be divided, round timber, is fixedly disposed on a band saw carriage 2. The band saw car-riage 2 can be adjusted in the direction of double 10~ arrow ll sothat the workpiece 7 can be aligned with respect to the band saw 1. In order to perform the splitting work,.the workpa:ece 7 is moved on 'the hand n saw carriage 2 toward the band saw 1 in the direction of double arrow 10.
; Beside the frame of the band saw 1 and in the , proximity thereof; a camera 4 is adjustably mounted in the cutting plane as an image recording unit. The camera 4 is not to toucl~a the dividing tool or a part thereof since this would result in interfering i 20 vibrations.
_ g In opposition to the operator at the control desk 3, a monitor 5 is set up which, in case the camera 4 is designed as a television camera, is made to be a television screen.
Tt can be seen from the illustration of Figure 2 that the camera 4 is arranged in the pro~cimity of the band saw 1 in such a way 'that it looks on the workpiece ? obliquely from above, i.e. that it is mounted at a level lying above the workpiece 7 to be split up, so thab the viewing angle 9 encompasses the entire workpiece and the band~saw carriage 2 movable on tracks 8.
Figure 3 shows the image of the band saw car-riage 2 and of the workpiece 7 (round timber) produced on the monitor 5.
Lt can furthermore be seen fram Figure 3 -that a line 6 is provided on the monitor 5. The line 6 can be a simple rod adjustably arranged at the monitor 5, or also a rubber band or a line produced an the screen with a pen. However, it is preferred that the line 6 is produced in the monitor 5 electronically.
The line 6 symbolizes the plane 6' (Figure 1) in which the band saw 1 is effective. The line 6 is adjustable on the manitor 5 so that, in case of remounting of the camera 4 and/or of the band saw 1, the line 6 can be correspondingly aligned in the dividing plane 6°.
-- to -Figure 4 once again shows the image on the monitor 5 in a schematic view. Tt can be seen that, by adjusting the band saw carriage 2 in the direction of double arrow 11, the cutting plane 6', symbolized by the line 6 on the manitor 5, can be aligned with.
respect 'to the workpiece ? to be divided so that optimum guidance of the cut is achieved. this is of importance, for example, for the first-time working of round timber in order to remove slabs therefrom since unnecessary waste (slabs which are too thick) should be avoided.
In the embodiment shown in Figure 5, a further fine 12 is provided xn addition to line ~ on the moni-for 5; this further line is adjustable (double arrow 13) mechanically or in the scanning field of the monitor with the aid of a program provided for this purpose.
The spacing of line 12 from the zero line 6 can be set, for example, to the distance corresponding to the width of a workpiece to be made from the work-piece 7. This embodiment is especially suited for a V-cut and, respectively, far the dividing of lags into wood according to a specification. -Figure 5, finally, shows an embodiment with a zero line 6 and several movable lines 15. This embodiment is preferably employed far frame saws.
._ , Figure 6 also indicates that it is possible to generate on the monitor 5 an image symbolizing the outer contour of the workpiece to be manufactured, this being a rectangle in the illustrated embodiment, so that the operator can determine, from 'the monitor 5, whether it is at all possible to produce this workpiece from the workpiece blank 7. :Lf the answer is in the positive, after checking the moni-for 5, then the work--piece 7 can be aligned, for example by adjusting the band saw carriage 2 in the direction of double arrow 11, with respect to the zero line 5 in such a way that a maximally advantageous cutting guidance is ensured for the first cut. and the subsequent cuts.
Figures 7--11 show schematically monitors with images as they are obtained in case the camera 4 is arranged. as shown in Figure 2, above the workpiece (e. g. the log 7) to be divided.
The illustration of Figure 7 first of all shows the two lines 6 and 12 (as in Figure 5) and their align-ment lines 6° and 12', respectively. In the example of Figure 7, the spacing between the zero line ~ and the adjustable line 12 is set at '°20.0 cm", this value being displayed at 16 on the monitor. The alignment lines 6° and 12' emanate from points 17, 18 wherein the lines 6 and 12 intersect witkr'the outer contour of the log '~ at the top.
12 _ ~. ,.~ s~s ~n7hile Figure 7 shows the alignment of a "band saw, left", Figure 8 shows the analogous case for a "band saw, right'° .
Figures 9-11 show illustrations correspond-s ing analogously to Figure 7, produced with the use of frame saws (Figure 9), double-band saws and frame saws (Figure 10), and, respectively, in case o~
circular trimming saws (Figure 11) when the camera 4 is arranged above the.workpiece.
The camera 4 can also be equipped with a zoom lens. This~embodiment makes it possible in each case to vary (readjust? the zopm setting (optionally automaticallyD so that the dimension (e.g. the diameter) a~ the workpiece 7 is in all instances displayed on the screen 5 with identical size, independently o~ the distance from the lens of camera 4.
Examples far the design o~ the electronic section o~ the apparatus o~ this invention are il--lustra~ted in Figures l2 and l3. These will be explained hereinbelow:
In Figure l2, a microprocessor unit 31 accepts data from the PC or central computer 39 regarding a cutting site 38 and controls, by way of a driver stage 32, the motor 34 for the zoom adjust-meat of the zoom lens 30 of camera 4. The motor 34 is, for example, a DC synchronous motor or a stepping motor.
The actual value return signal to the micro-processor unit is transmitted via the generator 33 which can be a potentiometer, a pulse generator, or the like.
The actual value return signal is corrected by way of a corresponding functional curve (zoom ratio =
function of the position return signal.D and compared to the desired value (from PC or central computer) and readjusted.
In the image storage unit 35, the data far diverse linear or punctiform markers, as well as alphanumerical symbols (for display in the monitor) are stored and~or deposited.
The address counter 36 serves for readout from the image storage unit for indication on the monitor 5 via the D/A converter 37'.
An analog-to-digital converter 37' that may be included in certain cases'serves for object recognition, measurement, selective zoom adjustment, ~.nd so forth.
In case of Figure 13, intended especially for the division of panels and similar workpieces, the control 40 is utilized in order to control the movements of two separating units 41 and 42 by way of their drive mechanisms 43 and 44. Similar drive mechanisms are provided for the two separating _ 14 _ units (not shownD acting in directions perpendicular to the separating units 41, 42, the cwtting planes of which are symbolized by the lines 45, 47. The position of the lines 45, 46, 47 and 48 on the monitor 5 is adjusted to the desired position with the aid of the keyboard 49, with observation of the monitor 5 on which an image 7' of the workpiece 7 is displayed.
The thus-given desired values are transmitted via the ,.
control unit 54 by way of a positional control unit 5 to the adjustment drive units~43, 44 of the separating devices 41, 42 and thus the separating devices 41 ,42 are readjusted by follow-up.
If the apparatus of this invention is . used in frame saws or similar dividing Coals generating a large amount of dust and wood fragments during opera--tion, it is recommended to mount the camera 4 at a distance from the dividing tool.
Claims (14)
1. Apparatus for dividing a workpiece along a dividing plane, comprising a tool for dividing the workpiece, the tool and the workpiece being movable relatively to each other along a predetermined path for performing the dividing work, a support for supporting the workpiece to be adjustable transversely to the dividing plane, an rage recorder covering the workpiece, the image recorder detecting at least the end face of the workpiece to be split up, being mounted in a dividing plane of the dividing tool and being connected with a monitor for producing an image of at least the end face of the workpiece to be divided which faces the dividing tool and the image recorder, and at least one indicator line symbolizing the dividing plane being provided on the monitor.
2. Apparatus according to claim 1, wherein the dividing tool is one of a band saw and a frame saw.
3. Apparatus according to claim 1 or 2, wherein the image recorder is a television camera.
4. Apparatus according to claim 1, 2 or 3, wherein the monitor is a televison screen.
5. Apparatus according to any one of the preceding claims, wherein the dividing tool acts in several planes and is a frame saw, characterized in that multiple indicator lines are provided on the monitor which symbolize dividing planes in which the saws of tree frame saw are effective.
6. Apparatus according to any one of the preceding claims, characterized in that additionally at least one additional line is provided on the monitor which is adjustable transversely to the indicator line symbolizing the dividing plane, and that the additional line can be set at a selected distance from the indicator line symbolizing the first dividing plane, which distance corresponds to the distance of a second dividing plane from the first dividing plane.
7. Apparatus according to one of claims 1 to 6, characterized in that the monitor is arranged at a control desk of the apparatus in a position wherein it can be observed by the operator sitting at this desk.
8. Apparatus according to one of claims 1 to 7, characterized in that each indicator line is represented by one of a string and a rod attached to the monitor at the housing of the monitor and being in contact with the screen of the monitor.
9. Apparatus according to claim 8, wherein the string is a rubber string.
10. Apparatus according to one of claims 1 to 9, characterized in that the at least one indicator line is a line electronically generated on the monitor.
11. Apparatus according to one of claims 1 to 10, characterized in that an outer contour of the cross section of at least one cut workpiece to be produced by splitting from the workpiece is reproduced on the monitor.
12. Apparatus according to one of claims 1 to 11, characterized in that the at least one line symbolizing the dividing plane on the monitor can be shifted, for adjusting the apparatus, into a position coinciding with the image of the cutting plane on the monitor.
13. Apparatus according to one of claims 1 to 12, characterized in that the image recorder is mounted in the proximity of at least one of the dividing tool and the starting cut side of the workpiece.
14. Apparatus according to one of claims 1 to 12, characterized in that the image recorder is mounted in the zone of the finished cut side of the workpiece.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT0155889A AT393986B (en) | 1989-06-26 | 1989-06-26 | DEVICE FOR DIVIDING WORKPIECES, IN PARTICULAR WOOD |
| AT1558/89 | 1989-06-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2019278A1 CA2019278A1 (en) | 1990-12-26 |
| CA2019278C true CA2019278C (en) | 2000-02-01 |
Family
ID=3515993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2019278 Expired - Lifetime CA2019278C (en) | 1989-06-26 | 1990-06-19 | Apparatus for dividing workpieces, especially wood |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5251141A (en) |
| EP (1) | EP0406219B1 (en) |
| AT (2) | AT393986B (en) |
| CA (1) | CA2019278C (en) |
| DE (1) | DE59002370D1 (en) |
| ES (1) | ES2043352T3 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6219585B1 (en) * | 1994-07-21 | 2001-04-17 | Silvatech Corporation | Three dimensional log scanning device for a log positioning and saw system |
| ES2141889T3 (en) * | 1994-09-19 | 2000-04-01 | Totani Giken Kogyo Kk | MACHINE TO MANUFACTURE BAGS. |
| FR2726781A1 (en) * | 1994-11-15 | 1996-05-15 | Logsys | Log=handling and =cutting installation |
| DE19852170C1 (en) * | 1998-11-12 | 2000-02-24 | Mohr Adolf Maschf | System for cutting stacked sheet type material e.g. paper or cardboard with rear table part for receiving material, also at least one camera for monitoring position of material to be cut in region of feed unit, giving precise positioning |
| US6929043B2 (en) * | 2001-07-24 | 2005-08-16 | Valley Machine Works Ltd. | Optimized board edger and method of operation thereof |
| US7156730B1 (en) * | 2003-07-21 | 2007-01-02 | Fmc Technologies, Inc. | Method and system for achieving acceptable process time |
| US7163038B2 (en) * | 2004-03-01 | 2007-01-16 | Globe Machine Manufacturing Company | Systems and methods for end squaring and dividing elongated materials |
| WO2008143861A1 (en) * | 2007-05-15 | 2008-11-27 | Hudson Sharp Machine Co. | Method of making and inspecting bags |
| US20080302226A1 (en) * | 2007-06-07 | 2008-12-11 | Credo Technology Corporation | Power tool having imaging device and display device |
| DE102011102997B4 (en) * | 2011-05-24 | 2016-07-14 | Paul Wassmer | Method for controlling a sawing device and corresponding sawing device |
| CN109968456B (en) * | 2019-04-12 | 2020-11-27 | 山东工业职业学院 | Automatic longitudinal cutting system for slope corrugated wood board |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1918599C3 (en) * | 1969-04-12 | 1973-11-08 | Fritz 6731 Helmbach Seeber | Device for processing round wood |
| SE7610080L (en) * | 1976-09-10 | 1978-03-11 | Kockums Ind Ab | KIT AND DEVICE FOR ADJUSTING A STOCK TO THE OPTIMAL DOCTOR IN FRONT OF A SAW |
| FI64760C (en) * | 1981-05-29 | 1984-01-10 | Ahlstroem Oy | FOERFARANDE FOER INRIKTNING AV EN STOCK |
| US4471823A (en) * | 1982-08-10 | 1984-09-18 | Npi New Products Investment Ab | Log processing positioning means |
| US4688296A (en) * | 1983-09-09 | 1987-08-25 | The State Of Western Australia Department Of Agriculture | Means for breaking down carcasses |
| DE3601523C1 (en) * | 1986-01-20 | 1987-07-16 | Manfred Richter | Process for positioning and measuring workpieces on machining lines |
| US4977805A (en) * | 1986-04-10 | 1990-12-18 | Corley Manufacturing Company | Edging apparatus |
| US4879659A (en) * | 1987-11-24 | 1989-11-07 | Bowlin William P | Log processing systems |
| GB2221187B (en) * | 1988-05-17 | 1993-02-24 | Amada Co Ltd | Device and method for measuring shape and dimensions of workpiece in sawing machine,and device for automatically adjusting position of saw blade guide |
| US4941100A (en) * | 1988-11-30 | 1990-07-10 | Mcfarlane Arthur M G | Automatic edger saw |
-
1989
- 1989-06-26 AT AT0155889A patent/AT393986B/en not_active IP Right Cessation
-
1990
- 1990-06-19 CA CA 2019278 patent/CA2019278C/en not_active Expired - Lifetime
- 1990-06-22 US US07/542,417 patent/US5251141A/en not_active Expired - Lifetime
- 1990-06-22 ES ES90890189T patent/ES2043352T3/en not_active Expired - Lifetime
- 1990-06-22 AT AT90890189T patent/ATE93177T1/en not_active IP Right Cessation
- 1990-06-22 EP EP19900890189 patent/EP0406219B1/en not_active Expired - Lifetime
- 1990-06-22 DE DE9090890189T patent/DE59002370D1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| US5251141A (en) | 1993-10-05 |
| CA2019278A1 (en) | 1990-12-26 |
| ATA155889A (en) | 1991-07-15 |
| ES2043352T3 (en) | 1993-12-16 |
| ATE93177T1 (en) | 1993-09-15 |
| EP0406219A1 (en) | 1991-01-02 |
| EP0406219B1 (en) | 1993-08-18 |
| DE59002370D1 (en) | 1993-09-23 |
| AT393986B (en) | 1992-01-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed | ||
| MKEC | Expiry (correction) |
Effective date: 20121202 |