Intelligent square timber sawing machine board cutting mode free switching mode

Abstract

The invention discloses an intelligent square timber sawing machine board cutting mode free switching mode which comprises the following steps that a visual identification system collects surface images of square timbers in a detection area and judges the types of the square timbers, and the types of the square timbers include square timbers with skins on the two sides, square timbers with skins on the single side and square timbers without skins on the two sides; selecting a corresponding board opening mode according to the type of the square timber and generating a square timber cutting line; the deviation rectifying assembly performs deviation rectifying treatment on square timber according to the square timber cutting line, and the deviation rectifying assembly comprises two sets of deviation rectifying rollers; the deviation rectifying assembly conveys the square timber subjected to deviation rectifying treatment to the saw cutting assembly for slitting; a square wood board is scanned through the visual recognition system, whether the square wood board is provided with the skin on the two sides or the skin on the single side or not on the two sides is judged, then according to the different kinds of square wood boards recognized visually, the preset board opening mode is utilized, free selection and switching are achieved, the manual board bridging time can be greatly shortened, the same machine table is used, and the board bridging efficiency is greatly improved. And sawing of various square timbers can be achieved, convenience and rapidness are achieved, and time and labor are saved.

Description

Technical Field

[0001] The invention belongs to the technical field of wood processing, and in particular relates to a free switching method of a board opening mode of an intelligent square wood sawing machine. Background Art

[0002] At present, most of the square wood sawing machines on the market belong to conventional mechanical square wood sawing machines. For example, the Chinese utility model patent with application number 201620922741.X discloses a square wood cutting device, which relates to a cutting device, including a base and a first bracket, a second bracket, and a third bracket installed on the base from left to right in sequence; the first bracket and the second bracket are jointly provided with an upper knife roller and a lower knife roller, and the upper knife roller and the lower knife roller are fixedly installed with cutting blades; the right end of the lower knife roller extends to the outside through the second bracket, and a chuck is fixedly provided at the right end of the lower knife roller; the right end of the lower knife roller is also provided with a clamping ring clamped on the chuck, and a ring groove is provided on the outer surface of the clamping ring; a screw rod is provided on the third bracket, and one end of the screw rod is close to the ring groove, and a handle is provided at the other end of the screw rod. The above device has a simple structure, is easy to operate, and enables the cut wood to have two different thicknesses.

[0003] However, when faced with different types of square timber raw materials, such as square timber with bark on both sides, square timber with bark on one side, and square timber without bark on both sides, traditional square timber saws require manual selection and separate sawing or require the addition of a backing to assist in sawing, which has low efficiency and high labor costs. Summary of the invention

[0004] The present invention provides a method for freely switching the board opening mode of an intelligent square wood sawing machine, aiming to solve the problem that the existing square wood sawing machine cannot freely adjust the sawing mode according to the type of square wood raw materials.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A method for freely switching the board opening mode of an intelligent square wood sawing machine includes the following steps:

[0007] Step 1: The visual recognition system collects the surface image of the square wood in the detection area and determines the type of the square wood, which is: square wood with skin on both sides, square wood with skin on one side, and square wood without skin on both sides;

[0008] Step 2: Select the corresponding board opening mode according to the square timber type and generate the square timber cutting line;

[0009] Step 3: The correction component corrects the square wood according to the square wood cutting line. The correction component includes two sets of correction rollers;

[0010] Step 4: The correction component transports the square timber after correction to the sawing component for cutting.

[0011] Furthermore, the board opening modes in step 2 include: a board opening mode with square wood with skin on both sides, a board opening mode with square wood with skin on one side, and a board opening mode with square wood without skin on both sides.

[0012] Furthermore, the board opening mode of square timber with skin on both sides includes: the visual recognition system collects the surface image of the square timber in the detection area, and extracts the inner contour curve of the square timber in the image; two irregular inner contour curves are fitted through a certain number of points respectively; the distance between the lines connecting two points in the two inner contour curves is calculated, and the line with the shortest distance is taken; two parallel preset cutting lines are preset between the two inner contour curves, and the preset cutting lines are perpendicular to the line with the shortest distance; the intersection points of the rotation axis of each correcting roller and the preset cutting lines are extracted, and the correction distances between the intersection points corresponding to each correcting roller and the lines to be cut are calculated.

[0013] Furthermore, the single-sided skinned square timber board opening mode includes: the visual recognition system collects the surface image of the square timber in the detection area, extracts the inner contour curve of the skinned side of the square timber and the outer contour straight line of the non-skinned side in the image, and fits the inner contour curve through a certain number of points; calculates the distance from the point on the inner contour curve to the outer contour straight line respectively, and takes the point on the inner contour curve with the shortest distance; draws a parallel line to the outer contour straight line through the point, and uses the outer contour straight line and the parallel line as the preset cutting line; extracts the intersection point of the rotation axis of each correcting roller and the preset cutting line, and calculates the correcting distance between the intersection point corresponding to each correcting roller and the line to be cut.

[0014] Furthermore, the board opening mode of square timber without skin on both sides includes: the visual recognition system collects the surface image of the square timber in the detection area, and extracts the outer contour straight lines on both sides of the square timber in the image; the midline of the outer contour straight lines on both sides is used as the preset cutting line; the intersection point of the rotation axis of each correcting roller and the preset cutting line is taken, and the correcting distance between the intersection point corresponding to each correcting roller and the line to be cut is calculated.

[0015] Furthermore, the visual recognition system simultaneously captures the image of the correction roller, extracts two outer contour lines of the correction roller image, and calculates the rotation axis based on the two outer contour lines.

[0016] Furthermore, the deviation-correcting roller comprises: an upper roller, a lower roller, a transverse shifting assembly and an elastic member, wherein the upper roller is driven by the elastic member to approach the lower roller, and the transverse shifting assembly pushes the upper roller and the lower roller to synchronously move along the direction of their rotation axis.

[0017] Furthermore, the outer surface of the upper drum and / or the lower drum is provided with friction patterns.

[0018] Furthermore, the sawing assembly includes: a sawing pressure roller and a saw blade group.

[0019] Furthermore, the distances between adjacent saw blades in the saw blade group are the same.

[0020] Compared with the prior art, the present invention has the following technical effects:

[0021] 1. The present invention uses a visual recognition system to scan the square wood board to determine whether the square wood board has double-sided skin, single-sided skin, or no skin on both sides, and then uses a pre-set board opening mode according to different types of square wood boards identified visually, and freely chooses to switch, which can greatly reduce the time for manual board selection. The same machine can realize the sawing of multiple square woods, which is convenient, fast, time-saving and labor-saving.

[0022] 2. The present invention utilizes a visual scanning system to scan square timber, calculates various types of square wood boards, and then performs precise sawing, thereby being able to produce more primary boards, thereby increasing the yield of timber and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the device of the present invention;

[0024] Figure 2 It is a schematic diagram of the correction of the present invention;

[0025] Figure 3 is a schematic diagram of a deviation correction component of the present invention;

[0026] Figure 4 It is a schematic diagram of a square wood with skin on both sides of the present invention;

[0027] Figure 5 This is a schematic diagram of a single-sided bark-bearing square timber of the present invention;

[0028] Figure 6 It is a schematic diagram of a square wood without skin on both sides of the present invention.

[0029] In the figure: 1, visual recognition area; 2, deviation correction component; 21, upper roller; 22, lower roller; 23, transverse movement component; 24, elastic component;

[0030] 3. Sawing roller; 4. Saw blade assembly; 5. Square wood to be cut; 6. Preset cutting line. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in combination with specific embodiments of the present application and with reference to the accompanying drawings.

[0032] In a specific embodiment, the present invention provides a method for freely switching the opening mode of an intelligent square wood sawing machine, comprising the following steps:

[0033] Step 1: The visual recognition system collects the surface image of the square wood in the detection area and determines the type of the square wood, which is: square wood with skin on both sides, square wood with skin on one side, and square wood without skin on both sides;

[0034] Step 2: Select the corresponding board opening mode according to the square timber type and generate the square timber cutting line;

[0035] Step 3: The correction component corrects the square wood according to the square wood cutting line. The correction component includes two sets of correction rollers;

[0036] Step 4: The correction component transports the square timber after correction to the sawing component for cutting.

[0037] The board opening modes in step 2 include: a board opening mode with square wood with skin on both sides, a board opening mode with square wood with skin on one side, and a board opening mode with square wood without skin on both sides.

[0038] The board opening mode of square timber with skin on both sides includes: the visual recognition system collects the surface image of the square timber in the detection area, and extracts the inner contour curve of the square timber in the image; two irregular inner contour curves are fitted through a certain number of points respectively; the distance between the lines connecting two points in the two inner contour curves is calculated, and the line with the shortest distance is taken; two preset cutting lines 6 parallel to each other are preset between the two inner contour curves, and the preset cutting lines 6 are perpendicular to the lines with the shortest distance; the intersection points of the rotation axis of each correcting roller and the preset cutting lines 6 are extracted, and the correcting distances between the intersection points corresponding to each correcting roller and the lines to be cut are calculated.

[0039] The single-sided skinned square timber board opening mode includes: the visual recognition system collects the surface image of the square timber in the detection area, extracts the inner contour curve of the skinned side of the square timber and the outer contour straight line of the non-skinned side in the image, and fits the inner contour curve through a certain number of points; calculates the distance from the point on the inner contour curve to the outer contour straight line respectively, and takes the point on the inner contour curve with the shortest distance; draws a parallel line to the outer contour straight line through the point, and takes the outer contour straight line and the parallel line as the preset cutting line 6; extracts the intersection point of the rotation axis of each correcting roller and the preset cutting line 6, and calculates the correcting distance between the intersection point corresponding to each correcting roller and the line to be cut.

[0040] The board opening mode of square timber without skin on both sides includes: the visual recognition system collects the surface image of the square timber in the detection area, extracts the outer contour straight lines on both sides of the square timber in the image; takes the midline of the outer contour straight lines on both sides as the preset cutting line 6; takes the intersection point of the rotation axis of each correcting roller and the preset cutting line 6, and calculates the correcting distance between the intersection point corresponding to each correcting roller and the line to be cut.

[0041] Preferably, the visual recognition system simultaneously captures the image of the deflection correction roller, extracts two outer contour lines of the deflection correction roller image, and calculates the rotation axis according to the two outer contour lines.

[0042] like Figure 3 As shown, the deviation-correcting roller includes: an upper roller 21, a lower roller 22, a transverse shifting assembly 23 and an elastic member 24. The upper roller 21 is driven by the elastic member 24 to approach the lower roller 22, and the transverse shifting assembly 23 pushes the upper roller 21 and the lower roller 22 to move synchronously along the direction of their rotation axis.

[0043] like Figure 3 As shown, the outer surfaces of the upper drum 21 and / or the lower drum 22 are provided with friction patterns.

[0044] like Figure 1 As shown, the sawing assembly includes: a sawing pressure roller 3 and a saw blade group 4.

[0045] like Figure 1 As shown, the distances between adjacent saw blades in the saw blade set 4 are the same.

[0046] like Figure 2 As shown, taking the board opening mode of the square wood with skin on both sides as an example, after the square wood 5 to be cut enters the visual recognition area 1, the front and rear of the square wood 5 to be cut are clamped by two groups of correction rollers in the correction component 2 respectively; Figure 3 As shown, the timber 5 to be cut is between the upper roller 21 and the lower roller 22. The elastic force of the elastic member 24 pushes the upper roller 21 toward the lower roller 22, so that the timber 5 to be cut is clamped between the upper roller 21 and the lower roller 22. There is a large friction between the timber 5 to be cut and the upper roller 21 / lower roller 22, which can clamp the timber 5 to be cut and move. The transverse moving assembly 23 adopts a screw transmission structure driven by a servo motor. The upper roller 21 / lower roller 22 is driven to rotate by the corresponding motor. The moving direction of the transverse moving assembly 23 is consistent with the rotation axis of the upper roller 21 / lower roller 22. The upper roller 21, the lower roller 22 and the timber 5 to be cut clamped by the upper roller 21 and the lower roller 22 are driven to move by the transverse moving assembly 23. Figure 1As shown, the intersection of the rotation axis of the front correcting roller and one of the preset cutting lines in the horizontal plane is set to A2, and the intersection of the rotation axis of the rear correcting roller and one of the preset cutting lines in the horizontal plane is set to B2; an initial comparison line is also preset, and the intersection of the rotation axis of the front correcting roller and the initial comparison line is set to A1, and the intersection of the rotation axis of the rear correcting roller and the initial comparison line is set to B1; it is assumed that point C2 is the point for correcting the position to be cut. The rotation axis of two sets of correcting rollers, the cutting line of the built-in saw blade group 4, etc. can be built into the visual software of the visual recognition system in advance to form a background image, and the image of the square wood 5 to be cut obtained by shooting is compared and calculated with the background image. It is also possible to shoot the two sets of correcting rollers in real time to obtain the corresponding rotation axis. According to the preset cutting line obtained by the square timber 5 to be cut, the moving distance of the correcting roller clamping the front of the square timber 5 to be cut is: LC-LA, and the moving distance of the correcting roller clamping the rear of the square timber 5 to be cut is: LC-LB. The two groups of correcting rollers are controlled by PLC to move the corresponding distances along their axial directions, and the clamped square timber 5 to be cut is moved to the corresponding specifications at one time, so that the square timber 5 to be cut is moved into place.

[0047] Similarly, the correction methods in the single-side peeled square wood opening mode and the double-side unpeeled square wood opening mode are the same as the correction methods of the double-side peeled square wood opening mode mentioned above, and will not be repeated here.

[0048] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A method for freely switching the opening mode of an intelligent square timber sawing machine, characterized in that: The following steps are involved: Step 1: The visual recognition system collects the surface image of the square wood in the detection area and determines the type of the square wood, which is: square wood with skin on both sides, square wood with skin on one side, and square wood without skin on both sides; Step 2: Select the corresponding board opening mode according to the square timber type and generate the square timber cutting line; Step 3: The correction component corrects the square wood according to the square wood cutting line, and the correction component includes two sets of correction rollers; Step 4: The correction component transports the square timber after correction to the sawing component for cutting.

2. The method for freely switching the opening mode of the intelligent square wood sawing machine according to claim 1 is characterized in that: The board opening modes in step 2 include: a board opening mode with square wood with skin on both sides, a board opening mode with square wood with skin on one side, and a board opening mode with square wood without skin on both sides.

3. The method for freely switching the opening mode of the intelligent square wood sawing machine according to claim 2 is characterized in that: The board opening mode of square timber with skin on both sides includes: a visual recognition system collects surface images of square timber in a detection area and extracts inner contour curves of the square timber in the image; two irregular inner contour curves are fitted through a certain number of points respectively; the distance between the lines connecting two points in the two inner contour curves is calculated, and the line with the shortest distance is selected; two preset cutting lines (6) parallel to each other are preset between the two inner contour curves, and the preset cutting lines (6) are perpendicular to the line with the shortest distance; the intersection points of the rotation axis of each correcting roller and the preset cutting lines (6) are extracted, and the correcting distances between the intersection points corresponding to each correcting roller and the lines to be cut are calculated.

4. The method for freely switching the opening mode of the intelligent square wood sawing machine according to claim 2 is characterized in that: The single-sided skinned square timber board opening mode includes: a visual recognition system collects a surface image of the square timber in a detection area, extracts an inner contour curve of the skinned side of the square timber and an outer contour straight line of the non-skinned side in the image, and fits the inner contour curve through a certain number of points; respectively calculates the distance from the point on the inner contour curve to the outer contour straight line, and takes the point on the inner contour curve with the shortest distance; draws a line parallel to the outer contour straight line through the point, and uses the outer contour straight line and the parallel line as a preset cutting line (6); extracts the intersection point of the rotation axis of each correcting roller and the preset cutting line (6), and calculates the correcting distance between the intersection point corresponding to each correcting roller and the line to be cut.

5. The method for freely switching the opening mode of the intelligent square wood sawing machine according to claim 2 is characterized in that: The board opening mode of square wood without skin on both sides includes: the visual recognition system collects the surface image of the square wood in the detection area, extracts the outer contour straight lines on both sides of the square wood in the image; takes the midline of the outer contour straight lines on both sides as the preset cutting line (6); takes the intersection point of the rotation axis of each correcting roller and the preset cutting line (6), and calculates the correcting distance between the intersection point corresponding to each correcting roller and the line to be cut.

6. The method for freely switching the opening mode of the intelligent square wood sawing machine according to claim 1 is characterized in that: The visual recognition system simultaneously collects the image of the correction roller, extracts two outer contour lines of the image of the correction roller, and calculates the rotation axis according to the two outer contour lines.

7. The method for freely switching the opening mode of the intelligent square wood sawing machine according to claim 1 is characterized in that: The deviation-correcting roller comprises: an upper roller (21), a lower roller (22), a transverse shifting assembly (23) and an elastic member (24); the upper roller (21) is driven by the elastic member (24) to approach the lower roller (22); and the transverse shifting assembly (23) pushes the upper roller (21) and the lower roller (22) to synchronously move along the direction of their rotation axes.

8. The method for freely switching the opening mode of the intelligent square wood sawing machine according to claim 1 is characterized in that: The outer surfaces of the upper roller (21) and / or the lower roller (22) are provided with friction patterns.

9. The method for freely switching the opening mode of the intelligent square timber sawing machine according to claim 1 is characterized in that: The sawing assembly comprises: a sawing pressure roller (3) and a saw blade assembly (4).

10. The method for freely switching the opening mode of the intelligent square wood sawing machine according to claim 1, characterized in that: The distances between adjacent saw blades in the saw blade group (4) are the same.

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