Timber thickness adjustment device

FIELD: woodworking industry, particularly for measuring moving timber thickness.

SUBSTANCE: device comprises conveyer for feeding timber material to be adjusted to obtain predetermined timber thickness, thickness measuring means, processing unit to determine insufficient timber thickness, means to distinguish above timber from another ones. Thickness measuring means determines timber thickness in several points during conveyance thereof on the base of main output signals generated by displacement transducers. Displacement transducers are located in several locations along timber width. If timber has several parts of a given length with thicknesses deviated from tolerance band for predetermined value in conveyance direction one can come to conclusion that timber has insufficient thickness.

EFFECT: reduce time of thickness determination, increased quality thereof.

5 cl, 8 dwg

 

The technical field to which the invention relates.

This invention relates to a device for controlling the thickness of the wood material.

The level of technology

Wood materials for use as building materials, etc. are processed to given dimensions using special cutting systems. However, there are cases when treated material contains a portion of reduced thickness due to the warping of the material before entering the cutting process. In the case of wood material 100 with warping, as shown in Fig.7, with its longitudinal end, for example, the wood has a generally predetermined thickness t1, if it is part of the outside of the cut lines (upper and lower cut lines)shown in Fig cut. However, the thickness t2 of the Central part of the resulting wood-based material is less than the thickness t1. If a smaller thickness t2 is not within the margin of tolerance for the given thickness is t1, this woody material is discarded due to insufficient thickness. Similarly, the obtained wood material contains more than the thin part at its transversely opposite ends. When such wood material is used as material for laminated lumber, a gap between the materials. Because of this, do not provide sufficient area connection is the link between the materials. In addition, to the parts to be pressed to connect, you cannot apply the necessary pressure. This leads to defects in compound materials.

In this regard, it was common practice to have a controller, which visually monitored each cut the wood to determine the availability of parts with a reduced thickness. Unfortunately, because visual inspection is time consuming, the cutting system must be programmed to work with a lesser rate, so as to ensure synchronous operation of the cutting process control. Accordingly, the performance decreases. In addition, the control must be performed by qualified controller and therefore, the inspection results may vary depending on individual assessment of supervisors. As a result, the quality of manufactured wood material is not constant.

With this in mind, the purpose of this invention is to provide a device for controlling the thickness of a Board that performs control quickly and ensures stable quality of products.

The invention

The device control Board thickness according to this invention includes: a device conveyor feed wood material subject to regulation Board thickness given in the mask; device for measuring the thickness of a Board to determine the thickness of the Board at several points of the wood material as a dimension object as a conveyor feed him on the basis of the output signals of the displacement sensors located in several different places across the width of the wood material; a processing unit to determine that the wood is a material with insufficient thickness, if the results of measurement issued by the device measuring the thickness of a Board, it is determined that there is a set number of parts, having a thickness of boards, deviating from the fields of tolerance by a specified amount, in the direction of the feed conveyor; and a device for differences woody material is defined as having insufficient thickness, from other wood-based materials (paragraph 1 of the claims).

A device for controlling the thickness of a Board, made as stated above, the device dimensions Board thickness measure the thickness at several points of the wood material as of the measurement object when the pipeline flow. The processing unit determines the wood as a material with insufficient thickness, if you have a set number of parts, having a thickness of boards, deviating from the fields of tolerance in the direction of the feed conveyor. Wood material is defined as having insufficient t is Lino, different from other wood materials. Thus, a device for controlling the thickness of a Board, allowing for easy control and stable quality products without the aid of visual inspection.

In the specified device for controlling the thickness of the Board (item 1 of the claims), the processing unit may determine the wood as a material having insufficient thickness, based on at least one of the conditions: part, having a thickness of boards, deviating from the fields of tolerance, has the specified length L1 or more in the direction of the feed conveyor, and there are at least a given number of parts, having a length L1 or more, per unit length of the wood material, and a part having a thickness of boards, deviating from the fields of tolerance, has the specified length L2 (>L1 or more in the direction of the feed conveyor (item 2). In this case, the determination of whether or not the Board thickness is insufficient or not, is based on two factors, including the degree of length in the direction of the feed conveyor parts that are different in thickness from the field of tolerance, and frequency of appearance parts with insufficient thickness. Due to this, you can determine whether or not the width of the Board is insufficient.

In the above device for controlling the thickness of the Board (item 1) displacement sensors can be located in the Central part of the Board and in places near opposite ends of the width (paragraph 3). In this case, the Board thickness is measured at three points, including the center point. This ensures reliable detection of warpage or shrinkage of the wood material.

In the above device for controlling the thickness of the Board (item 1) to the processing unit can be connected to an input device for inputting a reference value to determine a product with insufficient thickness (paragraph 4). In this case, the reference value for determining product with insufficient thickness can easily be changed. This allows you to program the correct reference value in accordance with the type or the like required of the wood material.

In the above device for controlling the thickness of the Board (item 1) discriminating device may be a device that marks the only wood material is defined as material that does not have a sufficient thickness (paragraph 5). In this case, the marking provides a definitive and easy recognition products with insufficient thickness.

Brief description of drawings

In the drawings shows:

figure 1 and figure 2 - relative location of the pipeline and displacement sensors of the device for controlling the thickness of a Board according to one variant of implementation of the present invention, a top view and a vertical section;

figure 3 - flowchart (first half) of the device DL is controlling the thickness of a Board according to the invention;

4 is a flowchart (second half) of the device for controlling the thickness of a Board according to the invention;

5 is a graphical flow chart of the control device for controlling the thickness of a Board according to the invention;

6 is a graphical diagram of the operations of the marking device for controlling the thickness of a Board according to the invention; and

7 and Fig - warped wood material in the form of a longitudinal end, and the wood material is treated to align its thickness, respectively.

Description of the preferred option of carrying out the invention

Figure 3 and 4 shows a block diagram of an apparatus for controlling the thickness of a Board according to one variant of implementation of the present invention. Two flowcharts together represent a single device. As shown in figure 3, at a distance from each other there are three pairs of sensors 2 move, with each pair of sensor 2 is located at the top and bottom of the wood material 1 supplied by pipeline. For simplicity of the drawing of the three pairs of sensors 2 are shown spaced away from each other in the direction of the conveyor feed direction X in the figure), but in reality these pairs of sensors are located adjacent to each other. In addition, these pairs of sensors are not on the same line relative to the width direction (the Y direction in the figure) (detailed what the Scripture will be given below). Each pair of spaced vertical sensor 2 measures move the appropriate distance to the upper side and the lower side of the wood material 1. Each of the sensors 2 move is connected through a gain block with 3 graphalloy controller 4. The output signal of the sensor 2 displacement is amplified in the amplifying unit 3, and then graphalloy the controller 4 calculates the thickness of a Board based on the amplified signals are passed to a pair of gain blocks 3, and the actual distance between a pair of sensors 2, located at a distance from each other in the vertical direction. Device for controlling the thickness of a Board for this determination the Board thickness can be easily performed by using a laser displacement sensors with a charge-coupled series LK), gain blocks (series LK) and graphalloy controllers (RJ), offered by the company KEYENCE CORPORATION.

The appropriate Board thickness output signal grafenhofer controller 4 is transmitted to the programmable controller 6 shown in figure 4, through the terminal 5, while the programmable controller is used as a processing unit. Programmable controller 6 is connected to the control panel 11 having a circular sensor 7 sensor 8 wood material, the electromagnetic valve 9 and the touch panel 10. The angular sensor 7 provides the t output signal, specifies the dimension of the wood material 1, while the programmable controller 6 calculates the length of the wood material 1 based on the period of time during which it is fed the output signal of the measurement, and the speed of a conveyor feed. The sensor 8 wood material passes to the programmable controller 6 digital information on woody material 1 passing by him. Panel 11 control passes to the programmable controller 6 the value entered via the touch panel 10. Programmable controller 6, in turn, gives the panel 11 control information on the amount of wood material (serviceable item/defective item), etc. Solenoid valve 9 is connected to the source 12 of compressed air and a marking device 13. The electromagnetic valve 9 is shown in the figure, the position is opened and thereby ensures the release of the marking device 13 paint of the selected color.

Figure 1 and 2 shows the spatial arrangement of the conveyor and sensor move relative to each other. Figure 1 shows a top view, and figure 2 is a vertical cross-section. As shown in figures 1 and 2, the conveyor 14 includes the path 15 of the conveyor feed, lots of rollers 16, 17, 18, driven by a motor (not shown), the side guides 19 (shown only in figure 1) for linear movement of the tree of the aqueous material 1. After processing for regulating the thickness to a predetermined value at the previous stage of the wood material 1 is fed along the direction X with the set of drive rollers 16, 17, 18. On the path of the feed conveyor 15 has a hole 15A and three pairs of sensors 2 move above and below the hole 15A. The upper displacement sensors 21U, 22U, 23U contain each light emitting part of the E1, E2 and EZ and the light receiving part of R1, R2, R3 on the bottom side for emitting/receiving laser light. On the other hand, the lower sensors 21L, 22L, 23L move contain each light emitting part and light receiving part on the upper side for the emission/reception of laser light, while emitting/light receiving part are opposite the emitting/light receiving parts of the upper sensors 21U, 22U, 23U move.

Light emitting parts E1, E2, E3 upper sensors 21U, 22U, 23U move are located in different locations Y1, Y2, Y3 width (Y-direction). Namely, the light-emitting part of the E1 sensor 21U move is in place Y1, located in the middle of the width, while the light emitting part E2, EZ sensors 22U, 23U move where Y2, Y3 near opposite ends of the width. The lower sensors 21L, 22L, 23L move are as described above. Part to insufficient thickness of the wood material 1 due to what ograblenie or bend, often observed in any of these locations Y1, Y2, Y3. Therefore, the specified location of the sensor provides reliable detection bias. The reason for the location offset relative to each other sensors 21U, 22U, 23U and 21L, 22L, 23L move relative to the feed direction (X-direction) is that each sensor 2 move has a bit more length in the direction of the width of the workpiece, so that these sensors cannot be placed along the same line. If the displacement sensor is sufficiently short relative to the width of the wood material 1, the sensors can be located on one line.

Below is a description of the operation of the device for controlling the thickness of the boards with links to graphical diagram shown in figure 5. Graphical flowchart of operations performed by a programmable controller 6. First used the touch panel 10 for pre-commissioning programmable controller 6 of the terms, on the basis of which is determined defective/defective wood material 1. Namely, the wood material is determined as defective, if, for example, failure of a thickness exceeding permissible values Δt (= 0.25 mm) deviation relative to the nominal thickness of a Board has a specified length L1 (= 60 mm) or more and if not less than the specified number of parts of insufficient thickness, having a length L1 or Bo is her present on the unit of length (= 1 m). On the other hand, one disadvantage of thickness more than the specified value Δt that passes through a given length L2 (= 300 mm) or more, forms the condition for determining wood material as defective. Because these conditions vary depending on the quality required of woody material, prepared several sets of conditions that define the above numerical values, so you can use conditions.

As shown in figure 5, the first programmable controller 6 waits for the supply of woody material (stage S1). The arrival and passing of the wood material 1 is easily detected based on changes of the output signals of the sensors 2 move. When applying wood material 1 programmable controller 6 performs the measurement of the thickness of the boards (stage S2). Measuring the thickness of a Board lasts as long as the distance feed wood material 1 reaches the measuring length or until the time of passage of the wood material 1 (stage S2-S3 repeated cyclically). If at the stage S2 is determined that the lack of thickness exceeds the permissible value Δt, the programmable controller 6 performs the measurement of the length L1 to the length of the insufficient thickness. The length can easily identify with what ispolzovaniem feed speed (a constant value) and duration of the condition, when there is a deficiency thickness above the acceptable value Δt failure, and the duration is measured in hours in the programmable controller 6. In addition, the programmable controller 6 monitors the presence of lack of thickness exceeding the allowable value Δt failure occurring on a length of at least length L as a single event and counts the number n of occurrences of an event during the measurement.

When the length of feed wood material 1 reaches a length dimension, the programmable controller 6 proceeds to the step S4 to determine whether the wood material 1 is defective or not. In other words, the system determines whether or not the specified length L is less than L1, and the specified number n is less than N or not, or whether or not the specified length L not less than L2 or not. The definition is immediate, since the speed of operation of the programmable controller 6 a lot more feed speed. If it is determined that the wood is not defective, then the programmable controller 6 increases the reference intact wood materials per unit at the stage S7 and returns to the step S1 to repeat the same process with the next woody material 1. If, on the other hand, the wood material is determined as defective, then the programmable controller 6 vyd the em on stage S5 command to the marking. At stage S6 programmable controller 6 increases the count of defective wood materials by one and then returns to the step S1. It should be noted that reference good products and defective products displayed on the panel 11 control.

When given the command for marking, the programmable controller 6 performs an operation of marking shown on the graphical diagram in Fig.6, in parallel to the processes shown in figure 5, a multitasking way. First programmable controller 6 sets the operation of the marking on stage S51 figure 6. Namely, by using the touch panel 10 is programmed period of time between the determination of defective wood material 1 and the advent of defective wood material 1 under the marking unit 13 (see figure 4). On the basis of this programmable controller 6 starts the timer and waits for the time of marking (stage S52). During the labeling programmable controller 6 activates (gives energy) electromagnetic valve 9 (see figure 4), so that compressed air is supplied to the marking unit 13 for marking (emission of red paint, for example) defective wood material 1. After a predetermined period of time for marking (stage S54) programmable controller 6 turns off the electromagnetic valve 9 (stage S55) to the end of the operation Mar is irowiki.

Thus, the wood material 1 with insufficient thickness is detected at the end of the feed-length measurement and is separated from the other normal wood material on the basis of marks. Visual inspection is not required and therefore it is possible to increase the feed rate to provide high-speed control. In addition, quality control remains the same as the thickness of the Board is measured using displacement sensors located in different places. In line with this, you can get wood materials of consistent quality.

In the above embodiment, since the lack of thickness tends to manifest itself in any of the locations Y1, Y2, Y3, shown in figure 1, the wood material 1, as mentioned above, the thickness of the Board is measured in these three points. In the case of the object of control is the timber of relatively small diameter, thickness measurement Board at three points essentially provides the control with 100% reliability. However, the number of measurement points can be increased or decreased depending on the width or type of wood material, or from the required quality. It should however be noted that the thickness of the Board can preferably be measured at least at two points, as the measurement in one point has the risk of low reliability.

Although the above described embodiment of the example of the wood material 1 in the form of a Board, you can control the lumber with a square cross-section for use as a column or beam (having a square or rectangular cross-section) in relation to the vertical/horizontal size of its parts, as well as controlled by the thickness of the Board. In addition, you can control the width of the wood material in the form of a Board with a pair of displacement sensors located on transversely opposite ends of the wood material, as well as control the thickness of the Board, or to consider the size in width as the thickness of the Board" in a broad sense.

In the previous embodiment, the work on the preliminary adjustment of the thickness of the Board is executed before the control. Maximum Board thickness is usually limited by the location of the manufacturing tools and therefore deviations in the positive direction does not occur. However, the aforementioned device for controlling the thickness of the Board can similarly be applied to wood materials, pre-processed, which can cause errors in the positive direction.

1. The device controlling the thickness of a Board containing a conveyor device of the filing of the trees is on material be regulated to a predetermined value of the thickness of a Board, a measuring device Board thickness to determine the thickness of the Board at several points of the wood material as a dimension object as a conveyor feed on the basis of the output signals of the displacement sensors located in several different places across the width of the wood material, the processing unit to determine whether the wood material with insufficient thickness, if the results of measurement issued by the device measuring the thickness of a Board, it is determined that there is a set number of parts of a given length, having a thickness of boards, deviating from the fields of tolerance on specified preset value in the direction of the feed conveyor, and a device to distinguish wood material defined as having insufficient thickness, from other wood materials.

2. The device controlling the thickness of a Board according to claim 1, characterized in that the processing unit determines the wood as a wood material having insufficient thickness, based on at least one of the conditions: part, having a thickness of boards, deviating from the fields of tolerance, has the specified length L1 or more in the direction of the feed conveyor and there are at least a specified number of parts, having a length L1 or more, per unit length, etc is LESNOGO material, and part of having a Board thickness deviating from the field that has the specified length L2 (>L1) or more in the direction of conveyor flow.

3. The device controlling the thickness of a Board according to claim 1, wherein the displacement sensors are located in the Central part and the places near the opposite width ends.

4. The device controlling the thickness of a Board according to claim 1, characterized in that the specified processing unit connected to the input device for input of a reference value for determination of wood material with insufficient thickness.

5. The device controlling the thickness of a Board according to claim 1, characterized in that the discriminating device performs marking only wood material is defined as material that does not have a sufficient thickness.



 

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FIELD: woodworking industry, particularly for measuring moving timber thickness.

SUBSTANCE: device comprises conveyer for feeding timber material to be adjusted to obtain predetermined timber thickness, thickness measuring means, processing unit to determine insufficient timber thickness, means to distinguish above timber from another ones. Thickness measuring means determines timber thickness in several points during conveyance thereof on the base of main output signals generated by displacement transducers. Displacement transducers are located in several locations along timber width. If timber has several parts of a given length with thicknesses deviated from tolerance band for predetermined value in conveyance direction one can come to conclusion that timber has insufficient thickness.

EFFECT: reduce time of thickness determination, increased quality thereof.

5 cl, 8 dwg

FIELD: measurement technology.

SUBSTANCE: sensor has tactile part and image forming aid. Tactile part of sensor has transparent flexible case and many groups of markers disposed inside flexible case. Any group of markers is made of many dyed markers. Markers composing different groups have different color in any group. Behavior of dyed markers is photographed by means of image forming aid in case when object touches flexible case. Different groups of markers preferably have different spatial disposition. Measurement is carried out by means of multi-channel reading-out which uses color or optical spectrum for tactile optical sensor to get info for many degrees of freedom at any point on surface.

EFFECT: improved precision of measurement.

33 cl, 21 dwg

FIELD: measuring technique.

SUBSTANCE: method comprises generating thermocapillary flow in the layer of liquid by means of laser beam, which leads to the dynamic deformation of the free surface of the liquid as a hollow, determining the thickness of the layer from the time interval between the moment of switching in of the laser beam and the moment of the beginning of the measurements of the diameter or the distribution of the intensity of light spot observed on the screen mounted in the cross-section of the laser beam reflected from the hollow.

EFFECT: reduced measurement time and simplified method.

3 dwg

FIELD: measuring equipment engineering.

SUBSTANCE: device contains light source, photo-electric transformer, signals processing block, indicator, which are located in body and connected to direct voltage source. signals processing block is made in form of first, second and third delay elements, first, second, third, fourth, fifth and sixth AND circuit, first, second OR circuits, first, second, third, fourth, fifth, sixth counters, first, second and third triggers, generator, transformer of direct code to auxiliary code, division block, permanent memorizing device and register.

EFFECT: decreased error of measurement.

3 cl, 6 dwg

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