Efficient utilization method of round bamboo sections

Abstract

The efficient utilization method comprises the steps that the diameter and the wall thickness of the small end face of the round bamboo section obtained by sawing raw bamboo are measured, and the round bamboo section is fitted into a hollow circular truncated cone; obtaining a first subdivision number optimal solution and a second subdivision number optimal solution on the basis of the fine planing bamboo strip section size, the rough planing cutting amount and the fine planing cutting amount which are given by a client; selecting a smaller one from the optimal solutions of the first subdivision number and the second subdivision number as an optimal solution of the subdivision number of the round bamboo sections; on the basis of the obtained optimal solution, the round bamboo section is divided into a plurality of bamboo pieces in the length direction of the round bamboo section, then four-side rough planing processing is conducted on the bamboo pieces on the basis of the rough planing cutting amount, rough planed bamboo strips are obtained, then four-side finish planing processing is conducted on the rough planed bamboo strips on the basis of the finish planing cutting amount, and finish planed bamboo strips are obtained; and finishing the processing of the finish planing bamboo canes. According to the method, the sectioning number of the round bamboo sections can be optimally controlled, and the outturn percentage of the round bamboo sections is increased.

Description

Technical Field

[0001] The invention relates to a method for efficiently utilizing round bamboo segments in the production process of bamboo laminated timber, and belongs to the field of production and processing of bamboo laminated timber. Background Art

[0002] Bamboo is a green, low-carbon, fast-growing, and biodegradable biomass material, making it a promising new raw material for the processing and manufacturing of panels and household products. Bamboo laminated timber, composed primarily of standard bamboo strips, is assembled and pressed along the grain to form panels or squares. It is a fundamental raw material for various prefabricated components and household bamboo products, including furniture, home decor, and structural materials. Among all bamboo-based materials, bamboo laminated timber boasts the largest production volume and the widest range of applications.

[0003] The current production process for bamboo laminated timber generally involves sawing the original bamboo to equal lengths along the axial direction to produce round bamboo segments. These segments are then split along their length (or axial direction) (simply removing any protruding nodes or septa) to produce multiple strips of equal width. These strips are then rough-planed and fine-planed to produce fine-planed strips, which are then assembled and glued together to create the final laminated timber. In actual production and processing, the cross-sectional diameter and wall thickness of the original bamboo vary from base to tip, resulting in varying cross-sectional diameters and wall thicknesses for the round bamboo segments obtained from sawing. Based on requirements such as assembly and gluing, customers have requirements for the cross-sectional dimensions of the bamboo strips after fine planing (the length of the bamboo strips usually meets the requirements and is not considered), but the process of splitting round bamboo segments is fixed, that is, the number of bamboo strips split along the length of the round bamboo segment is pre-set, and the cutting amount of rough planing and fine planing is also pre-set. Therefore, in order to meet customer requirements, the number of bamboo strips obtained by splitting the round bamboo segment is often less than the number of bamboo strips that can actually be split from the round bamboo segment, that is, the round bamboo segment is not efficiently utilized, there is a lot of waste, and the production cost is invisibly increased. Summary of the Invention

[0004] The object of the present invention is to provide a method for efficiently utilizing round bamboo segments, which can optimize the control of the number of round bamboo segments cut and improve the yield of the round bamboo segments.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A method for efficiently utilizing round bamboo segments comprises the following steps: Step 1: Measure the diameter D2 and wall thickness t2 of the small end surface of the round bamboo segment obtained by sawing the original bamboo. The round bamboo segment is fitted into a hollow truncated cone, which is recorded as the fitted round bamboo segment; Step 2: Based on the cross-sectional dimensions of the fine-planing bamboo strips given by the customer and the rough planing cutting amount k1 and the fine planing cutting amount k2, the optimal solution for the first number of divisions x is obtained through the following equations 1) and 2). a 、The second optimal solution x b : 1); 2); In the above formulas 1) and 2), a0 and b0 are the width and thickness of the planed bamboo strips given by the customer; Step 3: Find the optimal solution x from the first number of subdivisions a and the second subdivision number is the optimal solution x b The smaller one is selected as the optimal solution x for the number of round bamboo segments to be divided; Step 4: Based on the obtained optimal solution x, the round bamboo segment is divided into a plurality of bamboo strips along the length direction of the round bamboo segment, and then the bamboo strips are rough-planed on four sides based on the rough-planing cutting amount k1 to obtain rough-planed bamboo strips, and then the rough-planed bamboo strips are fine-planed on four sides based on the fine-planing cutting amount k2 to obtain fine-planed bamboo strips; Step 5: Complete the processing of fine-planed bamboo strips.

[0006] The advantages of the present invention are: In the production process of bamboo composite materials, the present invention can optimize the calculation of the number of round bamboo segments to be cut based on the customer's requirements for the cross-sectional dimensions of fine-planing bamboo strips and the processing loss parameters of rough planing and fine planing cutting amounts, thereby greatly improving the utilization rate of round bamboo segments, reducing waste, increasing the yield rate, and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is an implementation flow chart of the method for efficiently utilizing round bamboo segments of the present invention.

[0008] Figure 2 It is a schematic diagram of the three-dimensional structure of the fitted round bamboo segment.

[0009] Figure 3 It is a schematic diagram illustrating the implementation of the method for efficiently utilizing round bamboo segments of the present invention. DETAILED DESCRIPTION

[0010] like Figures 1 to 3 As shown, the present invention proposes a method for efficiently utilizing round bamboo segments, comprising the steps of: Step 1: Measure the small end diameter D2 and wall thickness t2 of the round bamboo segment obtained by sawing (axially equal length sawing) the original bamboo. The round bamboo segment is fitted into a hollow truncated cone, recorded as fitted round bamboo segment 10, which is used to perform the following steps 2), 3), AB, and ac. In other words, the small end diameter D2 and wall thickness t2 measured in step 1 are used as the small end diameter D2 and wall thickness t2 of the fitted round bamboo segment 10, respectively. The round bamboo segment here refers to the round bamboo segment after the protruding bamboo nodes (or bamboo septa) on the surface have been removed, so that it can be subjected to the following cutting process; Step 2: Based on the cross-sectional dimensions of the fine-planing bamboo strips given by the customer and the rough planing cutting amount k1 and the fine planing cutting amount k2, the optimal solution for the first number of divisions x is obtained through the following equations 1) and 2). a 、The second optimal solution x b : 1); 2); In the above formulas 1) and 2), a0 and b0 are the cross-sectional dimensions of the planed bamboo strips given by the customer, i.e., the width and thickness of the planed bamboo strips. The length of the planed bamboo strips is the height h of the fitted round bamboo segment 10 and is fixed. Step 3: Optimal solution x from the first number of subdivisions a and the optimal solution for the second subdivision number x b The smaller one is selected as the optimal solution x for the number of round bamboo segments to be divided; Step 4: Based on the obtained optimal solution x, the round bamboo segment is split into a plurality of bamboo pieces 20 along the length direction (or axial direction) of the round bamboo segment (equally divided along the circumference of the round bamboo segment). The bamboo pieces 20 are then rough-planed on four sides based on the rough-planing cutting amount k1 (removing the main bamboo green layer, bamboo yellow layer, and natural curved surface), resulting in roughly rectangular rough-planed bamboo strips 30. The rough-planed bamboo strips 30 are then fine-planed on four sides based on the fine-planing cutting amount k2 (precision cutting to ensure that the bamboo strip surface meets the predetermined roughness requirements while ensuring that the cross-sectional dimensions and straightness meet the standards), resulting in fine-planed bamboo strips 40. Step 5: Complete the processing of the fine-planed bamboo strips and wait for the subsequent assembly and gluing of the fine-planed bamboo strips to obtain bamboo laminated materials.

[0011] The present invention provides a method for processing round bamboo segments into finely planed bamboo strips, achieving efficient utilization of the round bamboo segments. In the present invention, the optimal solution x for the number of round bamboo segment divisions is the maximum number of divisions that, given the round bamboo segment dimensions, finely planed bamboo strip specifications, and processing losses, achieves the maximum volume of finely planed bamboo strips that meet the required specifications. Therefore, based on the optimal solution x, the round bamboo segment is divided into a corresponding number of bamboo strips, which are then processed through rough planing and fine planing. This approach significantly improves the utilization rate of the round bamboo segments, reduces waste, increases the yield of bamboo strips, and reduces production costs.

[0012] In addition, according to actual production and processing experience, the present invention has concluded that when splitting round bamboo segments, the optimal solution x for the number of splits should be obtained based on the small end face 12. In other words, only in this way can the processing of finely planed bamboo strips be achieved.

[0013] In this industry, the production and processing process of bamboo laminated timber is generally to saw the original bamboo into equal lengths along its own length direction or axial direction to obtain round bamboo segments, and then simply remove the protruding bamboo nodes or bamboo partitions on the round bamboo segments, and then split the round bamboo segments into multiple bamboo strips of equal width along the length direction or axial direction of the round bamboo segments, and then rough-planed and fine-planed the bamboo strips to obtain fine-planed bamboo strips, and then the bamboo strips are assembled and glue-pressed to finally obtain bamboo laminated timber.

[0014] Here, the length direction (or axial direction) of the original bamboo is consistent with the length direction (or axial direction) of the round bamboo segment. In addition, because the cross-section of the round bamboo segment is not a regular circular ring, when measuring the small end diameter D2 and wall thickness t2 of the round bamboo segment, measurements should be made from multiple radial directions, and the average or other reasonable values ​​should be taken to avoid taking the maximum or minimum values.

[0015] In this industry, rough planing is the initial shaping of bamboo strips, while fine planing is the precise control of size to ensure that the specifications of fine planed bamboo strips meet customer needs.

[0016] In actual implementation, after step 3), the following steps are also included: Step A: Calculate the maximum width a and maximum thickness b that can be achieved by cutting the round bamboo segment into bamboo strips using the following equations 3) and 4): 3); 4); In the above equations 3) and 4), D2 and t2 are the diameter and wall thickness of the small end surface 12 of the fitted round bamboo segment 10, respectively, and x is the optimal solution for the number of round bamboo segment segments obtained in step 3); Step B: If the width a0 and thickness b0 of the planed bamboo strips specified by the customer are smaller than the maximum width a and maximum thickness b, respectively, proceed to step 4). Otherwise, this indicates that the round bamboo segment cannot be dissected according to the obtained optimal solution x to obtain planed bamboo strips of the required specifications, and the process ends.

[0017] In practical applications, the above formulas 1) and 2) are derived by reverse deduction of the derived formulas 3) and 4) for calculating a and b.

[0018] In actual implementation, step 4) also includes the following steps: Step a: Calculate the volume V of the fitted round bamboo segment 10 based on the following formula 5): 5); In the above formula 5), ​​h is the height of the fitted round bamboo segment 10, R1 and t1 are the radius and wall thickness of the large end surface 11 of the fitted round bamboo segment 10, and R2 and t2 are the radius and wall thickness of the small end surface 12 of the fitted round bamboo segment 10; Step b: based on the height h of the fitting circle bamboo section 10 and the width a0 and thickness b0 of the planed bamboo strip given by the customer, the volume V of the planed bamboo strip 40 obtained in step 4) is calculated j ; Step c: based on the optimal solution x, the utilization rate q of the circle bamboo section is calculated by formula 6): q=V j x / V 6).

[0019] Here, the circle bamboo section involved in the present application refers to the circle bamboo section obtained by cutting the original bamboo along the length direction or axial direction of the original bamboo, and removing the surface protruding nodes or bamboo joints, which can be subjected to the following cutting process. In practice, the circle bamboo section is not a regular cylinder, but actually has a large end and a small end, therefore, according to the actual structure of the circle bamboo section, the present application considers or fits the circle bamboo section as a hollow circular truncated cone structure, i.e. the fitting circle bamboo section 10, as shown in Figure 2 , the fitting circle bamboo section 10 has a large end face 11 and a small end face 12, and the whole fitting circle bamboo section 10 has a hollow cavity 13 along the length direction or axial direction (i.e. straight line O1O2) of the fitting circle bamboo section 10. As shown in Figure 2 , the radius of the small end face 12 of the fitting circle bamboo section 10 is O2A2, which is R2, and the diameter is D2, and the wall thickness of the small end face 12 is t2. Similarly, the radius of the large end face 11 is O1A1, which is R1, and the diameter is D1, and the wall thickness of the large end face 11 is t1. D2 is less than D1, and in addition, the height of the whole fitting circle bamboo section 10 is h, which is consistent with the circle bamboo section.

[0020] In the industry, according to the use of bamboo integrated material (such as furniture, home decoration, structural material, etc.), the customer has different requirements for the specifications of the planed bamboo strip, that is, the width and thickness a0 and b0 of the planed bamboo strip are given by the customer, and the length of the planed bamboo strip is the height h of the circle bamboo section, which is determined when the original bamboo is cut along the length direction, that is, the length (i.e. the height h of the circle bamboo section) of the circle bamboo section obtained after cutting the original bamboo meets the length requirement of the planed bamboo strip. And according to the production and processing experience, the customer will give the rough planing cutting amount k1, the planing cutting amount k2 and other processing loss parameters according to the quality of the original bamboo and other factors.

[0021] Here, the customer refers to the manufacturer and the like who processes and manufactures bamboo integrated material.

[0022] Figure 3 As shown in Figure 3 , the small end face 12 of the fitting circle bamboo section 10 is fitted as a hollow circular truncated cone. In Figure 3 , the small end face 12 is circular, and according to the optimal solution x obtained, the cross section of the cut bamboo piece 20 can be obtained, and then the maximum width a and the maximum thickness b that can be achieved by cutting the bamboo strip can be obtained. Figure 3 The figure shows the situation that the bamboo section 10 is divided into eight equal parts according to the obtained optimal solution x (x=8), and each bamboo piece 20 is of equal width. From the figure, it can be seen that a maximum size rectangular shape can be found based on the cross-sectional shape of the bamboo piece 20, so that the maximum width a and the maximum thickness b are obtained. Then, based on the rough planing cutting amount k1 and the fine planing cutting amount k2 given by the customer, the bamboo piece 20 is planed around the four sides, and the rough planed bamboo strip 30 and the fine planed bamboo strip 40 are obtained in succession. Figure 3 As can be seen, a maximum size rectangular shape can be found based on the cross-sectional shape of the bamboo piece 20, so that the maximum width a and the maximum thickness b are obtained. Then, based on the rough planing cutting amount k1 and the fine planing cutting amount k2 given by the customer, the bamboo piece 20 is planed around the four sides, and the rough planed bamboo strip 30 and the fine planed bamboo strip 40 are obtained in succession.

[0023] Here, the rough planing cutting amount k1 refers to the planing thickness implemented on each side around the four sides of the bamboo piece 20, and similarly, the fine planing cutting amount k2 refers to the planing thickness implemented on each side around the four sides of the rough planed bamboo strip 30.

[0024] Here, the length of the rough planed bamboo strip 30 and the fine planed bamboo strip 40 is equal to the height h of the fitted bamboo section 10 or the circular bamboo section, and the two end faces of the circular bamboo section except the four circumferential sides do not need to be planed.

[0025] The advantages of the present application are: In the production process of bamboo integrated material, based on the cross-sectional size requirements of the fine planed bamboo strip and the rough planing and fine planing cutting amount processing loss parameters given by the customer, the present application can optimize the calculation of the number of circular bamboo sections, greatly improve the utilization rate of the circular bamboo sections, reduce waste, improve the yield, and reduce the production cost.

[0026] The above describes the preferred embodiments of the present application and the technical principles used thereby. For those skilled in the art, any equivalent changes, simple replacements, etc. based on the technical solutions of the present application without departing from the spirit and scope of the present application are within the protection scope of the present application.

Claims

1. A method for efficiently utilizing round bamboo segments, characterized in that: Including steps: Step 1: Measure the diameter D2 and wall thickness t2 of the small end surface of the round bamboo segment obtained by sawing the original bamboo. The round bamboo segment is fitted into a hollow truncated cone, which is recorded as the fitted round bamboo segment; Step 2: Based on the cross-sectional dimensions of the fine-planing bamboo strips given by the customer and the rough planing cutting amount k1 and the fine planing cutting amount k2, the optimal solution for the first number of divisions x is obtained through the following equations 1) and 2). a 、The second optimal solution x b : 1）； 2）； In the above formulas 1) and 2), a0 and b0 are the width and thickness of the planed bamboo strips given by the customer; Step 3: Find the optimal solution x from the first number of subdivisions a and the second subdivision number is the optimal solution x b The smaller one is selected as the optimal solution x for the number of round bamboo segments to be divided; Step 4: Based on the obtained optimal solution x, the round bamboo segment is divided into a plurality of bamboo strips along the length direction of the round bamboo segment, and then the bamboo strips are rough-planed on four sides based on the rough-planing cutting amount k1 to obtain rough-planed bamboo strips, and then the rough-planed bamboo strips are fine-planed on four sides based on the fine-planing cutting amount k2 to obtain fine-planed bamboo strips; Step 5: Complete the processing of fine-planed bamboo strips.

2. The method for efficiently utilizing round bamboo segments according to claim 1, wherein: After step 3), the method further includes: Step A: Calculate the maximum width a and maximum thickness b that can be achieved by cutting the round bamboo segment into bamboo strips using the following equations 3) and 4): 3）； 4）； In the above formulas 3) and 4), D2 and t2 are the diameter and wall thickness of the small end face of the fitted round bamboo segment, respectively, and x is the optimal solution for the number of round bamboo segment segments obtained in step 3); Step B: If the width a0 and thickness b0 of the finely planed bamboo strips provided by the customer are respectively smaller than the maximum width a and the maximum thickness b, then execute step 4), otherwise end.

3. The method for efficiently utilizing round bamboo segments according to claim 2, wherein: The step 4) further includes the following steps: Step a: Calculate the volume V of the fitted round bamboo segment based on the following formula 5): 5）； In the above formula 5), ​​h is the height of the fitting round bamboo segment, R1 and t1 are the radius and wall thickness of the large end surface of the fitting round bamboo segment, and R2 and t2 are the radius and wall thickness of the small end surface of the fitting round bamboo segment; Step b: Calculate the volume V of the planed bamboo strips obtained in step 4) j ; Step c: Based on the optimal solution x, the utilization rate q of the round bamboo segment is calculated using the following formula 6): q=V j ×x / V 6).

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