• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
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  • 优先权
    • 专利摘要:
    The invention relates to a plant for treating a board blank (1), which plant comprises a transverse conveyor (2), a longitudinal conveyor (6), an edging or sawing device (12), an optimization computer and at least one measuring point (5) for measuring the quality data of the board, which measuring point (5) is located in connection with the transverse conveyor (2) and includes a line / video camera or cameras (13) and means for transmitting the measurement data to the optimization computer and means for centering the board (1) on the longitudinal conveyor (6) and for holding it in place relative to the center line (8) of the conveyor chain (7) of the longitudinal conveyor (6), the plant further comprising at least one second measuring point (15) after that measuring point (5) which is the first with respect to the running direction of the board blank (1), the second measuring point (15) for measuring shape data being located in connection with the longitudinal conveyor (6) and including a line / video camera or cameras (13) and means for transmitting the measurement data to the optimization computer, and for transmitting the measurement data from the first measuring point (5) and the second measuring point (15) to the optimization computer and joining to optimize the sawing / edging of the board blank (1). The invention also relates to a corresponding method for treating a board blank (1)
    公开号:SE1750824A1
    申请号:SE1750824
    申请日:2017-06-27
    公开日:2017-12-29
    发明作者:Kiiskinen Kari；Ropilo Juha；Ylönen Teemu
    申请人:Heinolan Sahakoneet Oy；
    IPC主号:
    专利说明:

    The invention relates to a plant and a method for treating a board blank. The invention relates in particular to a plant and a method according to the characterizing part of the independent claims.
    In a sawing process, unedged sideboard blanks arise when circular or band saws cut out pieces of the desired thickness from the outer surface of logs. The unedged silk board blanks from the saw line, which have an even thickness but which otherwise have an irregular shape, are processed into boards of even width by means of so-called The tradition is that whoever uses the edging, ie. the edge, determines approximately how wide the respective board blank should be and mechanically adjusts the blade blades of the machine to the desired width. According to surveys conducted by VTT in the 1970s, this procedure results in a value exchange of about 75 percent compared to a theoretical maximum. In a medium-sized Finnish sawmill, this 25 percent lower value exchange in practice meant that the sawmill lost several hundred thousand euros in annual income. In addition, the edging process was heavy and required a lot of labor.
    For the reasons mentioned above, a method was started to enable the automation of the edging process and the increase of the yield. The development work was facilitated by the fact that the price of microcomputers and electronic cameras fell and that data could be processed faster.
    An arrangement in which a chain conveyor laterally transports an uneduced board blank from a saw line to a feeder of an edging is known from these prior art edging processes. On the transverse conveyor is arranged a measuring point with the above video / line cameras to the measurement board shape (width and length) and also its error, depending on the application, as accurately as possible while the board blank runs through the camera area. It is possible to also install these cameras below the measuring point.
    After completing the measurement, the shape information of the board blank and also the information about its defects (twigs, rot, etc.), depending on the application, are sent to a computer which, through optimization, searches for the quality combination of thickness, width and length that gives the best results and can be processed the board in question in one of the process steps. The best optimization result seldom closely follows the physical centerline of the board blank. In practice, the center line is on a finished board on either side of the center line of the board blank or often obliquely relative to it. After receiving a finished optimization result, the optimization computer sends it to the other control automation in the edging machine for positioning the blank and the edging blade. When the feeder of the edging receives the board blank from the transverse conveyor, the board blank is set either hydraulically, or for example by means of an electric servo, in the desired position with regard to the center lines of the plant, the board blank and the optimized finished board. In this context, man also adjusts the edging of the edging to the optimized width. The board blank is pressure-resistant on the feed chain by means of rollers, after which the board blank is set in motion in the longitudinal direction and the cutting blades process a piece of sawdust with the desired width from the board blank.
    The disadvantages of the method are that the board blank moves after the measurement, and the board blank is positioned, for example, on the feed chain mechanically on the basis of the optimization result. In the mechanical positioning, the thin edges of the board blank are used and it is not possible to determine in advance exactly how they will behave. Positioning accuracy is poor, especially in the case of so-called "Through-sawn" board blanks from step l.
    An arrangement in which a chain conveyor laterally transports an uneduced board blank from a saw line in the direction of a feeder of an edging plant is known as another edging process. When the feeder of the edging receives the board blank from the tooth transverse conveyor, a simple device places it on the feed chain so that the center lines of the board blank and the feed chain are substantially parallel. Board blank is pressed onto the feed chain by means of rollers and the board blank is set in motion in the longitudinal direction parallel to the chain. When the board has reached full speed, its end lies in a measuring point with the above-mounted video / line cameras to measure the shape of the board (thickness, width and length) and also its error, depending on the application, as accurately as possible while the board moves in the longitudinal direction. possible to also install these cameras below the measuring point. In a system with a camera, a board blank of 6 meters must move six meters in the longitudinal direction in order for the board blank to be measured in its entirety. The longitudinal distance can be shortened by increasing the number of cameras. The most common arrangement is to install 3 cameras at two meter intervals, whereby the board blank only needs to move two meters to measure a board blank of 6 meters over the entire length.
    After completing the measurement, the shape information of the board blank and also the information about its defects (twigs, rot, etc.), depending on the application, are sent to a computer which, through optimization, searches for the quality combination of thickness, width and length that gives the best economic results and can be processed out of board matter in a later process step. The best optimization result seldom closely follows the physical centerline of the board. In practice, the center line is on a finished board on either side of the center line of the board blank or often obliquely in the relative tilt.
    After obtaining a finished optimization result, the optimization computer sends it to the other control automation in the edging machine for positioning edging cutting blades. Just before the board blank reaches the cutting edge of the edging, the optimization result is demented and the edging of the board is started. Since the optimization result seldom follows the mechanical center line of the plant, a so-called "" Bevelled edge "" at which the cutting blade of the machine follows the center line according to the optimization result while the board blank runs through the edging.
    The disadvantages of the method are that the board blank has a large speed at the measuring point (approx. 5 - 8 m / s), which i.a. results in poor error measurement accuracy. In addition, it is difficult to optimize the quality and space is required in the longitudinal direction depending on the optimization time, and the optimization time for the board blank is limited as it prolongs the longitudinal distance. It is relatively demanding to keep the measuring point clean, and due to the high speed it is not possible to measure the length of the board blank in a reliable way. In addition, since the vet optimization result is not obtained until the optimization has been completed, the cutting blades can only be positioned after the measurement and the optimization and the board spacing increase considerably. This in turn limits the capacity to a maximum of about 50 ppm.
    The plant and the method according to the invention combine features of the above-described processes in a new way which has an inventive step. This results in such advantages in the treatment of board blanks which cannot be achieved with only one of the plants described above according to the state of the art.
    The plant and method according to the invention consist of at least two separate measuring points, wherein in the measuring point which is the first with respect to the running direction of the board blank a quality measurement of the board blank is performed and wherein in the measuring point which is the second in the running direction a shape measurement of the board blank. / lan combines the data from the first measuring point with the data from the second measuring point in the second measuring point or after it and optimizes the board to be processed out of the board blank on the basis of information obtained from an optimization computer. The optimization information is transferred to an edging 4 / sawing device which sets its cutting blades in motion according to the optimization result and processes the board blank into a finished board. The first measuring point is located in a place where the board blank is transported by a transverse conveyor, whereby a single transport speed gives as accurate information about the quality of the board blank as possible. The second measuring point is located on a longitudinal conveyor, the board blank lying firmly on the conveyor and no longer being moved in the relative line of the conveying conveyor. In this way, the edging / sawing device obtains the exact physical measurement of the board blank (length, width, thickness and how unedged it is) and position relative to the center line of the longitudinal conveyor without changing the board blank position after the measurement.
    Compared with the solutions according to the state of the art, the plant and the method according to the invention have i.a. the following advantages and differences: - the quality measurement is performed when the speed of the board blank on the transverse conveyor is low, which results in a better measurement result, - the measurement of the physical measurements and the position in relation to the center line of the longitudinal conveyor is performed when the board is already in position the conveyor and is no longer moving in relation to the longitudinal conveyor chain line before it is edged / sawn, - the data from the first measuring point are combined with the data from the second measuring point in the second measuring point or after it, making it possible to use the optimization computer on the basis of the physical and the qualitative criteria optimize the board blank at the second measuring point or after it without the board board moving uncontrollably before it is edged / sawn, - the measuring quality generally increases because both measuring points give the best possible measuring results. Previous plants have shown significantly poorer qualitative or physical measurement data than the plant according to the invention. the longitudinal conveyor can maintain a high speed with a small board spacing without adversely affecting the quality measurement, whereby the production efficiency is not lower, and - if one measuring point is temporarily out of service, e.g. in the event of an error situation, the optimization can be performed on the basis of the measurement data from only the other measurement point. l / lan does not necessarily have to stop the production line for the time needed to eliminate the error.
    The plant and the method according to the invention are described in more detail in the following with reference to the accompanying drawing, in which Figure 1 is a simplified schematic view of the plant.
    Figure 1 is a simplified schematic view of the plant according to the invention. The plant comprises a transverse conveyor 2 which comes first in the running direction of the board blank 1 and which transports the board blank 1 in a direction which is transverse to its longitudinal axis 3. The running direction of the board blank 1 on the transverse conveyor 2 is indicated by an arrow 4. The cross-speed of the board blank 1 pure 2 is relatively low, typically about 1 m / s. In connection with the transverse conveyor 2, a first measuring point 5 is arranged with means for measuring the quality data of the board blank 1 and for sending them to an optimization computer. These means can, for example, consist of different types of video or line cameras 13 as well as different sensors of various kinds which make it possible to detect the quality of the board blank 1 (twigs, rot, twig holes and other defects). In the first measuring point 5 one or more cameras 13 can be installed, etc. The optimization computer collects the data from the first measuring point 5 and later combines them with data obtained from a second measuring point 15. l / joints to look at the board blank in the first measuring point can be placed on the transverse conveyor or both on and under it. The transverse conveyor 2 typically also includes means for inverting the board blank 1 and means for removing disqualified board blanks from the production line.
    The board blank 1 is moved from the transverse conveyor 2 to a longitudinal conveyor 6. On the longitudinal conveyor 6 the board blank 1 is centered on the center line of the feed chain 7 of the longitudinal conveyor 6, for example by means of guide means and after centering is poured into place relative to the center line on the longitudinal conveyor 6, for example by means of rollers which are pressed onto the board blank. The purpose of the centering is to place the center line 3 of the board blank 1 as close to the center line 8 of the longitudinal conveyor 6 of the longitudinal conveyor 6 as possible. The running direction of the longitudinal conveyor 6 is indicated by an arrow 11. On the longitudinal conveyor 6 the board blank 1 is typically raised to approx. / s.
    On the longitudinal conveyor 6 there is a second measuring point 15 for the measuring board blank 1 while the board blank is positioned / centered and is poured in place relative to the center line 8 on the longitudinal conveyor feed chain 7. The second measuring point 15 is provided with means for collecting the physical measurements of the board blank 1 (its shape data) and to send them to the optimization computer. These funds can, for example, consist of different types of video / line cameras 13 which make it possible to e.g. measure the thickness of the board, width, length and how unedged it is. At the second measuring point 15, one or more cameras 13 can be installed. Typically, the cameras 13 are three in number. In a system with a camera 13, a board blank of 1 meter must move six meters in the longitudinal direction in order for the piece to be measured in its entirety. The longitudinal distance can be shortened by increasing the number of cameras 13. In an arrangement with three cameras 13, the cameras are installed at 2-meter intervals, whereby the board blank 1 only needs to move 2 meters in order for a 6-meter board blank to be measured in its entirety. In addition, the cameras 13 may be located below the board blank 1 at the second measuring point 15. In addition, the shaping of the mold data may be performed after the board blank 1 has been centered, before the board blank is set in longitudinal motion. By using several cameras 13, it is possible to obtain a sufficiently accurate position indication in relation to the center line 8 of the supply chain 7 and it becomes possible to reduce the longitudinal layout of the plant to a minimum. More accurate information for use, however, is obtained from a complete longitudinal profile measurement of a moving board blank 1.
    When the measurement results are complete, the shape data of the board blank 1 is sent from the second measuring point 15 and its quality data from the first measuring point 5 to the optimization computer which, for example, searches for the combination of thickness, width, length and quality which gives the best economic result. question in a later process step. After the second measurement at the longitudinal conveyor 6, it is known exactly how the board blank 1 is positioned in relation to the center line 8 of the longitudinal conveyor feed chain 7 and supplements this information with the quality data obtained from the first measuring point 5 and which is immediately available. perform an optimization.The best optimization result seldom closely follows the physical centerline 9 of the board blank 1. In practice, the centerline lies on a finished board on either side the centerline 9 of the board blank or often obliquely in relation to it.
    After obtaining a finished optimization result, the optimization computer sends the optimization result to the control automation of an edging / sawing device 12 for positioning the cutting blade of the edging / sawing device. Just before the board blank 1 of the cutting edge of the near-edging / sawing device 12, position the cutting blades according to the optimization result and start the edging / sawing of the board blank 1. As the optimization result seldom follows the mechanical center line of the plant (center line 8 simultaneous and sk "Slanting / sawing" at which the cutting blade of the edging / sawing device 12 follows the center line according to the optimization result while the board blank 1 runs through the edging / sawing device in the plant and the method according to the invention can achieve significant advantages over prior art solutions. These benefits include that - the speed of the board blank 1 during the quality measurement in the first measuring point is relatively low, approx. 1 m / s, which gives good error measurement accuracy, - the high-quality error measurement enables effective optimization of the quality, - there will be plenty of time to optimize the board blank 1 before the second measurement point15 and further treatment of the board blank, - it is relatively easy to keep the first measuring point 5 clean on the production line, - the length of the board blank 1 is measured reliably, - the optimization result is known at an early stage, whereby the cutting blades can already be positioned in advance and can minimize the board gap and increase the capacity, - the board blank 1 does not move sideways in relation to the center line 8 of the longitudinal conveyor 6 of the conveyor 6 after the positioning measurement at the second measuring point 15, - the plant at best enables an accurate quality measurement in the first a complete profile measurement in the longitudinal direction at the second measuring point 15 so as to pray the best possible optimization results and yields are achieved, and - the measurement systems can, if necessary, constitute backup systems for each other if either of the measurements does not work for some reason.
    In the method according to the invention, a board blank 1 is transported to a first measuring point 5 in a movement transverse to its longitudinal axis by means of a cross-beam conveyor 2. In the first measuring point 5 a measurement of quality data is performed on the board blank to find out any flaws of the board blank, such as twigs , rot, twig or other defects. The measurements are made with a video / line camera 13 and one or more of them can be mounted in the measuring point. The data obtained is sent to an optimization computer which performs an optimization of the board blank 1 on the basis of the quality data. The fillings can be made from the top, bottom or both sides of the board 1. Typically, the plant also has means for turning the board 1 and for removing it from the production line, by means of which means one can use the boards to the same hob and sort out incorrect board elements. . The board blank 1 is moved from the transverse conveyor 2 to a longitudinal conveyor 6 and positioned on the center line 8 of the feed chain 7 of the longitudinal conveyor or as close to it as possible. The centering takes place, for example, mechanically with the aid of control means. After centering, the board blank 1 is poured into place in the inclined centerline 8 of the feed chain 7 by, for example, pressing it down with rollers.
    After completing the positioning and ensuring that the board blank 1 stays in place, the physical dimensions of the board blank 1 (its shape information), such as length, thickness, width and how uneven it are, are measured in a second measuring point 15. The measurements are performed with a or several video / line cameras 13 which may be located above and below the board blank 1. The loading can also be performed when the board blank 1 is still in place, but the best quality result is obtained when the board blank moves past the second measuring point 15 in the longitudinal direction. The data obtained are sent to the optimization computer and the quality data from the first measuring point 5 are combined with this data. It becomes possible to associate the quality data with the board blank 1, which is immovably positioned in relation to the center line 8 of the food chain 7, and to perform an optimization of the board blank based on both measurement results with the optimization computer.
    After obtaining a finished optimization result, the optimization computer sends the optimization result to the control automation of an edging / sawing device 13 for positioning the cutting blade of the edging / sawing device. Just before the board blank 1 reaches the cutting blades of the edging / sawing device 12, position them according to the optimization result and start edging / sawing the board blank 1. Since the optimization result seldom follows the mechanical center line of the plant (center line 8 on the longitudinal conveyor 6 supply chain 7) , you start at the same time ens.k. oblique edging / sawing at which the cutting blade of the edging / sawing device 12 follows the center line according to the optimization result while the board blank 1 runs through the edging / sawing device.
    Only a few preferred embodiments of the plant and method according to the invention have been described above. They do not limit the scope of the invention without the scope of the invention being defined by the following claims.
    权利要求:
    Claims (1)
    [1]
    A plant for treating a board blank (1), which plant comprises a transverse conveyor (2), a longitudinal conveyor (6), an edging or sawing device (12), an optimization computer and at least one first measuring point (5) for measuring the quality data of the board, which measuring point (5) is located in connection with the transverse conveyor (2) and includes single-line / video camera or cameras (13) and means for transmitting the measurement data to the optimization computer and means for centering the board ( 1) on the longitudinal conveyor (6) and to pour it into place in the relative center line (8) on the conveyor chain (7) of the longitudinal conveyor (6), characterized in that the plant also comprises at least one second measuring point (15) after the measuring point (5) which is the first with respect to the running direction of the board blank (1), the second measuring point (15) for measuring shape data being located in connection with the longitudinal conveyor (6) and including a line / video camera or cameras (13) and means for transmitting the measurement data to the optimization computer, and for transmitting the measurement data from the first measurement point (5) and the second measurement point (15) to the optimization computer and joining to optimize the sawing / edging of the board blank ( Installation according to claim 1, characterized in that the line / video camera or cameras (13) in the first measuring point (5) can be located above, below or on both sides of the transverse conveyor (2). Plant according to Claim 1 or 2, characterized in that the line / video camera or cameras (13) in the second measuring point (15) can be located above, below or on both sides of the longitudinal conveyor (6). A method for treating a board blank (1), which method comprises the following steps: the board blank (1) is transported to a first measuring point (5) with a transverse conveyor (2), on the board blank (1) a measurement of quality data is performed in the first measuring point (5), the quality data is transferred to an optimization computer, the board blank (1) is moved from the transverse conveyor (2) to a longitudinal conveyor (6), - the board blank (1) is positioned on the longitudinal conveyor (6) , and the board blank (1) is kept immobile in relation to the center line (8) of the conveyor chain (7) of the longitudinal conveyor (6), characterized in that - a second measuring point (15) is placed for measuring shape data in connection with the longitudinal conveyor (6). ), the shape data from the second measuring point (15) is transferred to the optimization computer, the optimization computer combines the measuring data from the first measuring point (5) and the second measuring point (15) with each other and performs an optimization of the board blank (1), optim the cutting information is transferred to an edging or sawing device (12), and the cutting blade of the edging or sawing device (12) is set according to the optimization result to obtain the best possible end result. Method according to claim 4, characterized in that the measurements in the first measuring point (5) are performed with one or more line / video cameras (13) which can be placed above, below or on both sides of the transverse conveyor (2). . Method according to Claim 4 or 5, characterized in that the measurements at the second measuring point (15) are carried out with one or more line / video cameras (13) which can be placed above, below or on both sides of the longitudinal conveyor (6).
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    同族专利:
    公开号 | 公开日
    FI20165534A|2017-12-29|
    SE540631C2|2018-10-09|
    FI127905B|2019-05-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FI20165534A|FI127905B|2016-06-28|2016-06-28|Apparatus and method to handle a board preform|
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