Method and device for processing bamboo

Abstract

The application discloses a processing method and device of bamboo, and relates to the field of material processing.The method comprises the following steps: processing round bamboo into bamboo board with a rectangular cross section; visually grading the end face of the bamboo board; establishing a bamboo fiber distribution density model; determining a sectioning position, and sectioning along the radial direction according to the relative value of fiber content distribution; independently grading and cold-pressing the bamboo slices obtained by sectioning; and respectively stacking and storing the bamboo slices with different thicknesses after vacuum drying and roller continuous drying. The bamboo slice sectioning device comprises a vacuum adsorption fixing device, which comprises a fixing device for adsorbing the bamboo board, and a fixing bottom plate, wherein a vacuum suction channel penetrating through the fixing bottom plate is arranged on the fixing bottom plate.The application can process the bamboo according to the fiber distribution along the radial direction of the bamboo wall, and prepare bamboo slices with different fiber contents and the same / different thicknesses, so that the uniform preparation and application of gradient variation bamboo are realized, the difference between units is eliminated, and materials and products with high strength and stable performance are more easily prepared.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of material processing, in particular to a processing method and device of bamboo. BACKGROUND

[0002] Bamboo is a natural biomass gradient composite material. In the height and diameter directions of the bamboo, the appearance size and performance of the bamboo have great variability. In the thickness direction of the bamboo wall, the physical and mechanical properties of the bamboo gradually change along with the gradient decrease of the vascular bundle content distribution density from the green bamboo to the yellow bamboo.

[0003] The processing and utilization methods of bamboo mainly include round bamboo and bamboo-based boards. The bamboo-based boards, such as bamboo integrated material, bamboo plywood, and reconstituted bamboo, are all bamboo boards prepared by processing bamboo into bamboo strips, bamboo splints, and bamboo bundles, and then by gluing, assembling, and pressing. However, the current processing of round bamboo and bamboo-based board units and boards regards bamboo as a homogeneous material for unified processing and utilization, without separate processing and utilization according to the gradient variability of the structure and performance of bamboo. This not only affects the yield of bamboo and the energy consumption of processing, but also causes instability and deformation of the structure and performance of the prepared units and boards, which is not conducive to the subsequent structural design, leading to the use of large materials for small purposes, the use of superior materials for ordinary purposes, or the use of superior materials for inferior purposes, and cannot fully utilize the characteristics of bamboo and efficiently utilize bamboo.

[0004] Therefore, there is an urgent need to design a technical solution for processing bamboo according to the fiber distribution in the radial direction of the bamboo wall to prepare bamboo thin sheets with different fiber contents and the same or different thicknesses. SUMMARY

[0005] The purpose of the present application is to provide a processing method and device of bamboo to solve the problems existing in the prior art, which can process bamboo according to the fiber distribution in the radial direction of the bamboo wall to prepare bamboo thin sheets with uniform fiber content in a single piece and different fiber contents in different pieces and the same or different thicknesses.

[0006] To achieve the above purpose, the present application provides the following solutions:

[0007] The present application provides a processing method of bamboo based on the natural gradient variability of the structure of bamboo. The natural gradient variability of the structure of bamboo refers to a natural and gradual structural feature existing from the outside to the inside of the bamboo. This structural feature makes the bamboo have different mechanical properties and physical properties at different positions, thereby giving the bamboo unique performance advantages. The processing method comprises the following steps:

[0008] S100, processing round bamboo into a flattened bamboo board with a rectangular cross section;

[0009] S200, visual grading of the end face of the bamboo board, taking a picture of the end face of the bamboo board, and according to the different colors of the fiber and parenchyma and the xylem, the distribution of the fiber content on the end face of the bamboo board is obtained by color contrast and gray value analysis;

[0010] S300, a model of the distribution density of the bamboo fiber is established, the relative value of the fiber content of the outermost layer is 1, and the relative value of the fiber content of the innermost layer is 0, and a fiber distribution density diagram of the entire rectangular cross section of the bamboo board in the thickness direction is established;

[0011] S400, according to the application requirement, the relative value interval of the fiber content is input, such as 0.1 or 0.2 or 0.3, and the machine processing determines the splitting position;

[0012] S500, splitting is performed according to the determined splitting position;

[0013] S600, the bamboo slices obtained by splitting are independently graded and cold-pressed according to different fiber content grades and different thicknesses;

[0014] S700, the bamboo slices with different thicknesses are dried respectively, and are stacked and stored after drying;

[0015] S800, application of the bamboo slices, different components are prepared according to the fiber content.

[0016] Optionally, the step S100 comprises:

[0017] S110, the round bamboo stem is cut into bamboo sections according to the required length of the board, and the bamboo sections are split into arc-shaped bamboo pieces;

[0018] S120, the arc-shaped bamboo pieces are processed into bamboo boards with a rectangular cross section.

[0019] Optionally, the step S500 comprises:

[0020] S510, a vacuum adsorption device is used to adsorb and fix the bamboo board;

[0021] S520, a planing tool is used to perform equal-thickness reciprocating splitting or unequal-thickness continuous splitting along the axial direction of the bamboo board from the end face of the bamboo board.

[0022] Optionally, in the step S120, the arc-shaped bamboo pieces with a width less than 4 cm are processed into bamboo pieces with a rectangular cross section by planing the upper and lower surfaces; and the arc-shaped bamboo pieces with a width greater than or equal to 4 cm are prepared into bamboo boards with flat rectangular cross sections on the upper and lower surfaces by softening, flattening and shaping.

[0023] Optionally, the length of the bamboo section is not more than 2 meters.

[0024] Optionally, the width of the arc-shaped bamboo piece is between 2 cm and 15 cm.

[0025] Optionally, in step S700, the bamboo sheet is dried to a moisture content of less than or equal to 8%.

[0026] Optionally, the bamboo sheet with a thickness of less than or equal to 0.8 mm is dried by a vacuum drying method; and the bamboo sheet with a thickness greater than 0.8 mm is dried by a roll-type continuous drying method.

[0027] The application further provides a bamboo processing device, which comprises a vacuum suction device, the vacuum suction device comprises a fixed bottom plate, a plurality of vacuum suction channels are formed in the fixed bottom plate, a vacuum suction device is connected to the top of the vacuum suction channels through a pipeline, and the bottom of the fixed bottom plate is used for suction of bamboo boards; a planing cutter is arranged obliquely below one side of the vacuum suction device, the height of the planing cutter can be adjusted, and the fixed bottom plate can drive the bamboo board to move horizontally along the planing cutter.

[0028] Optionally, a plurality of planing cutters are uniformly arranged obliquely below one side of the vacuum suction device, and the heights of the planing cutters are different.

[0029] The application has the following technical effects relative to the prior art:

[0030] The application is based on the natural gradient variation structure of bamboo, the bamboo is classified according to the fiber content through end face vision, the planing position and thickness are determined according to the different fiber content, and the bamboo with uneven structure and performance is uniformly prepared, that is, the single bamboo sheet prepared by planing the bamboo is more uniform in performance in each direction, the anisotropy is reduced, a stable structure and performance unit for researching and developing new bamboo materials with different performance requirements is provided, and the bamboo is used efficiently and appropriately. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings in the following description only constitute some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0032] Figure 1 It is a flowchart of the bamboo processing method of the application;

[0033] Figure 2 It is a schematic view of the end face image of the bamboo sheet and the bamboo board after gray scale processing;

[0034] Figure 3 It is a schematic view of the vascular bundle distribution density model of the end face of the bamboo sheet and the bamboo board from the outer layer to the inner layer;

[0035] Figure 4This is a diagram showing the location of the cross-section of bamboo cut with equal thickness.

[0036] Figure 5 A schematic diagram showing the arrangement of the vacuum adsorption device and the planing tool during equal-thickness splitting;

[0037] Figure 6 This is a schematic diagram illustrating the preparation of bamboo thin slices when splitting them into equal thicknesses.

[0038] Figure 7 This is a schematic diagram showing the arrangement of the vacuum adsorption device and the planing tool during unequal thickness splitting.

[0039] Figure 8 This is a schematic diagram of the process of splitting bamboo into equal-thickness sections.

[0040] Figure 9 This is a schematic diagram of the process of splitting bamboo of unequal thickness.

[0041] Figure 10 This is a schematic diagram of a partial structure of a vacuum adsorption device;

[0042] Figure 11 for Figure 10 Front view sectional view;

[0043] Figure 12 for Figure 10 A side view sectional diagram.

[0044] In the diagram: 1-bamboo board, 2-bamboo sheet, 3-slicing tool, 4-vascular bundle, 5-fixed base plate, 6-vacuum channel. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] The purpose of this invention is to provide a bamboo processing method and apparatus to solve the problems existing in the prior art. It can perform layered processing along the radial direction of the bamboo wall according to the fiber distribution to prepare bamboo sheets with uniform fiber content in each sheet, while different sheets have different fiber content and the same or different thicknesses.

[0047] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0048] refer to Figures 1-12As shown, the present application provides a processing method for bamboo, which follows the gradient variation structure and performance of bamboo itself, classifies bamboo according to the fiber content at different positions in the radial direction through end surface visual measurement, standardizes the size and cross section of bamboo, and then processes bamboo according to fiber distribution in the radial direction of bamboo wall to prepare bamboo sheet materials with different fiber contents, different performances and same / different thicknesses. The purpose is to realize reasonable, efficient and scientific utilization of bamboo through controllable, flexible classification and uniform division. The method comprises the following steps:

[0049] The round bamboo rod is cut into bamboo sections of a certain length according to the required length of the board before being cut off, and the length of the bamboo section is not more than 2 meters based on the sharpness in the length direction of the bamboo;

[0050] The bamboo section is divided into arc-shaped bamboo pieces with a certain arc by a bamboo breaking machine, which is a mechanical device for dividing whole bamboo into bamboo pieces or strips according to the required size, and belongs to a known device, so it is not described here;

[0051] The arc-shaped bamboo pieces with a width less than 4 cm are planed on the upper and lower surfaces by a planing tool 3 to process them into bamboo pieces with a rectangular cross section. The arc-shaped bamboo pieces with a width greater than or equal to 4 cm are softened, flattened and shaped to prepare bamboo boards 1 with flat upper and lower surfaces and a rectangular cross section. The end of the bamboo piece or the end of the bamboo board is sawn to form a flat and undamaged cross section, so that the distribution of vascular bundles 4, i.e. the fiber distribution, can be clearly distinguished on the end surface;

[0052] The end surface of the bamboo board is continuously photographed by a high-speed camera with a full-frame resolution of ≥1280×1280 pixels and a full-frame frame rate of ≥30 fps. According to the different colors of vascular bundles 4, parenchyma and transport tissues, color contrast and gray value analysis are performed to process the end surface gray value, taking the gray value of vascular bundles 4 as 255 and the gray value of parenchyma as 0, and taking the content of vascular bundles 4 as the fiber content, so as to obtain the distribution of fiber content on the end surface of the bamboo board 1;

[0053] A vascular bundle 4 distribution density model in the radial direction of bamboo from green to bamboo yellow is established, i.e. a vascular bundle 4 distribution density model from the outermost layer to the innermost layer of bamboo, taking the relative value of the vascular bundle 4 content of the outermost layer as 1 and the relative value of the vascular bundle 4 content of the innermost layer as 0 to establish a vascular bundle 4 distribution density map in the thickness direction of the entire rectangular cross section of the bamboo board 1;

[0054] Controllable processing of the bamboo board 1 is performed according to the relative value of the fiber content distribution, taking 0.1 or 0.2 or 0.3 as the interval to determine the section position of the end surface of the bamboo board 1;

[0055] The bamboo board 1 is fixed by a high-stability vacuum adsorption device, the reference surface on the top of the bamboo board 1 is adhered and fixed by a fixed bottom plate 5, and the bamboo board 1 is fixed by continuous vacuum extraction, the vacuum degree is 0.8-2 atmospheres, the flatness and strong fixation of the split bamboo board 1 are ensured, the stability of the bamboo board 1 in the splitting process is ensured, and the bamboo board 1 is completely split in the thickness direction, the bamboo board 1 cannot be completely split caused by a mechanical fixing device is reduced, and the remaining large-thickness bamboo board 1 is avoided;

[0056] The bamboo board 1 is fixed by a high-stability vacuum adsorption device, the reference surface on the top of the bamboo board 1 is adhered and fixed by a fixed bottom plate 5, and the bamboo board 1 is fixed by continuous vacuum extraction, the vacuum degree is 0.8-2 atmospheres, the flatness and strong fixation of the split bamboo board 1 are ensured, the stability of the bamboo board 1 in the splitting process is ensured, and the bamboo board 1 is completely split in the thickness direction, the bamboo board 1 cannot be completely split caused by a mechanical fixing device is reduced, and the remaining large-thickness bamboo board 1 is avoided;

[0057] When the bamboo board 1 is continuously split, the reference surface on the top of the bamboo board 1 is adhered and fixed by a fixed bottom plate 5, and the bamboo board 1 is fixed by continuous vacuum extraction, the vacuum degree is 0.8-2 atmospheres, the flatness and strong fixation of the split bamboo board 1 are ensured, the stability of the bamboo board 1 in the splitting process is ensured, and the bamboo board 1 is completely split in the thickness direction, the bamboo board 1 cannot be completely split caused by a mechanical fixing device is reduced, and the remaining large-thickness bamboo board 1 is avoided;

[0058] When the bamboo board 1 is continuously split, the reference surface on the top of the bamboo board 1 is adhered and fixed by a fixed bottom plate 5, and the bamboo board 1 is fixed by continuous vacuum extraction, the vacuum degree is 0.8-2 atmospheres, the flatness and strong fixation of the split bamboo board 1 are ensured, the stability of the bamboo board 1 in the splitting process is ensured, and the bamboo board 1 is completely split in the thickness direction, the bamboo board 1 cannot be completely split caused by a mechanical fixing device is reduced, and the remaining large-thickness bamboo board 1 is avoided;

[0059] The bamboo board 1 is fixed by a high-stability vacuum adsorption device, the reference surface on the top of the bamboo board 1 is adhered and fixed by a fixed bottom plate 5, and the bamboo board 1 is fixed by continuous vacuum extraction, the vacuum degree is 0.8-2 atmospheres, the flatness and strong fixation of the split bamboo board 1 are ensured, the stability of the bamboo board 1 in the splitting process is ensured, and the bamboo board 1 is completely split in the thickness direction, the bamboo board 1 cannot be completely split caused by a mechanical fixing device is reduced, and the remaining large-thickness bamboo board 1 is avoided;

[0060] The bamboo sheet 2 with different thicknesses is dried in different forms, wherein the bamboo sheet 2 with a thickness of less than or equal to 0.8 mm is dried by vacuum drying; the vacuum drying is a known technology, which is a drying method under vacuum and lower than atmospheric pressure. Under the vacuum condition, the boiling point of water is reduced, and the evaporation speed is accelerated, so that the drying speed can be accelerated at a lower temperature. The vacuum drying is a method of heating and drying under the condition of lower than atmospheric pressure by stacking the bamboo sheet 2 in a closed container, and the boiling point of water is reduced under the negative pressure condition, so that the internal moisture of the bamboo sheet 2 can be rapidly boiled and vaporized at a lower temperature, the water vapor pressure is increased, and the internal and external water vapor pressure gradient is formed, and most of the internal moisture of the bamboo sheet 2 is outwardly seeped under the action of the pressure gradient in the form of steam. Thus, the drying speed can be accelerated under the premise of ensuring the drying quality, and the bamboo sheet 2 with a thickness greater than 0.8 mm is dried by roll-type continuous drying, which is a known mature technology, and thus is not described herein; the drying is performed until the water content is less than or equal to 8%;

[0061] The bamboo sheet 2 is applied: the bamboo sheet 2 with high fiber content can be used to prepare high-strength plates or components; the bamboo sheet 2 with less fiber content can be used to prepare low-density, high-toughness packaging materials or non-structural components.

[0062] The processing device for bamboo material of the present application comprises a planing cutter 3, a drying device, a high-speed camera and a vacuum suction device, wherein the planing cutter 3, the drying device and the high-speed camera all adopt existing known devices, the vacuum suction device is installed on an existing three-dimensional moving device, the vacuum suction device comprises a fixed bottom plate 5, a plurality of vacuum suction channels 6 penetrating through the fixed bottom plate 5 are formed in the fixed bottom plate 5, a vacuum suction device such as a vacuum pump is connected to the top of the vacuum suction channels 6 through a pipeline, the bottom of the fixed bottom plate 5 is in a planar structure or has a smooth arc structure with an inner recess, and the bottom thereof is used to suction the upper surface of the bamboo plate 1; the vacuum suction device continuously performs vacuum suction on the vacuum suction channels 6 through the vacuum suction device, so that a negative pressure is formed between the bamboo plate 1 and the fixed bottom plate 5, and the fixed bottom plate 5 suction-absorbs the main material; the planing cutter 3 is arranged obliquely downward on one side of the vacuum suction device, the height of the planing cutter 3 can be adjusted, and the fixed bottom plate 5 can drive the bamboo plate 1 to move horizontally along the planing cutter 3.

[0063] Example 1

[0064] The bamboo material is a natural biomass gradient composite material, and the appearance size and performance of the bamboo stalk have great variability in the height and diameter directions of the bamboo stalk. In this embodiment, the Phyllostachys edulis is taken as an example, the diameter is reduced from 14 cm to 6 cm, and the basic density is increased from 0.696 g / cm 3 to 0.793 g / cm 3, the compressive strength increased from 45 MPa to 65 MPa, and the tensile strength increased from 180 MPa to 212 MPa. The bamboo wall is a composite material composed of 52% (volume fraction) parenchyma, 40% fiber tissue and 8% conducting tissue, and the vascular bundle 4 as a reinforcing body, the tensile strength and modulus are as high as 656.24 MPa and 37.19 GPa, respectively, which are more than ten times of the parenchyma (40.02 MPa and 1.7 GPa), and along the thickness direction of the bamboo wall, from the green bamboo to the yellow bamboo, the physical and mechanical properties of the bamboo are gradiently changed with the decreasing distribution density gradient of the vascular bundle 4 content, and the theoretical tensile strength of the bamboo at the green bamboo part with 80% vascular bundle 4 content can reach 750 MPa, while the tensile strength of the bamboo at the yellow bamboo part with 15% vascular bundle 4 content is only 150 MPa, and the air-dry shrinkage rate of the green bamboo is 19% higher than that of the yellow bamboo.

[0065] The processing method of the bamboo of the embodiment is as follows:

[0066] The market-purchased bamboo segments that have been cut off have a length of 1.2 m, a small head diameter of more than 10 cm, and a small head wall thickness of more than 8 mm;

[0067] The bamboo segments are classified according to a thickness interval of 1 mm, such as 8.5-9.4 mm for a 9 mm grade, 9.5-10.4 mm for a 10 mm grade, 10.5-11.4 mm for an 11 mm grade, and the like;

[0068] The bamboo segments are split: the bamboo segments with the same wall thickness grade are split by a bamboo breaking machine to obtain arc-shaped bamboo pieces with a width of 9 cm;

[0069] Softening: the split arc-shaped bamboo pieces are softened in a high-pressure tank with a saturated steam pressure of 0.8-0.9 MPa and a temperature of 170-200 ℃ for 8-10 min.

[0070] The softened arc-shaped bamboo pieces are flattened according to a known bamboo flattening process, and the green bamboo is reserved;

[0071] The flattened bamboo board 1 is fixed by a vacuum adsorption fixing device under a vacuum degree of 1 atmosphere;

[0072] The end surface of the bamboo board 1 is photographed by a camera, and gray scale processing and classification are performed: the relative value of the fiber content of the outermost layer of the bamboo board 1 is 1, the relative value of the fiber content of the innermost layer is 0, the classification is performed with an interval of 0.2, and the number of splitting layers and the splitting position are determined;

[0073] The distance between the splitting tool and the fixed bottom plate 5 is adjusted under the conditions of a slicing method, a temperature of 50-70°C, and a moisture content of more than 30%, and the flattened bamboo board 1 is cut into a first layer of bamboo pieces 0.5 mm thick with a high fiber content, with the green side as the reference surface.

[0074] Then, the bamboo board 1 is cut into bamboo pieces by reciprocating second, third, and fourth times, until all the bamboo pieces are cut;

[0075] The cut bamboo pieces 2 are cold-pressed and stored under the action of a shaping device at a pressure of 1.0 MPa for 12 hours.

[0076] The bamboo pieces 2 are dried by a multi-stage cycle process of vacuum, moisture removal, vacuum pressure retention, moisture removal, and pressure retention in a vacuum environment with a negative pressure of 0.3 MPa.

[0077] The bamboo pieces 2 are cut from the 8 mm thick bamboo board 1 from the outermost side inward, and the first, third, fifth, and seventh layers are selected for fiber content and tensile property calculation, as shown in Table 1:

[0078] Table 1 Performance indicators of bamboo pieces cut at different positions of the bamboo wall

[0079]

[0080]

[0081] Application of bamboo pieces 2 with different moduli and strengths: bamboo pieces 2 with high modulus, high strength, and high fiber content can be used in high-strength applications such as wind turbine blades and unmanned aerial vehicle wings, and bamboo pieces 2 with low performance can be used in the preparation of bamboo boards and flexible components such as one-time forming curved frames and furniture.

[0082] Example Two

[0083] This example is an improvement on Example One. In this example, the end surface of the bamboo board 1 is photographed and recorded by a camera, and gray scale processing and grading are performed: the relative value of the fiber content of the outermost layer of the bamboo board 1 is 1, the relative value of the fiber content of the innermost layer is 0, and the end surface fiber content is graded at intervals of 0.1.

[0084] Bamboo pieces 2 with a thickness of 0.3 mm are sliced at intervals of 0.1, bamboo pieces 2 with a thickness of 0.5 mm and 0.8 mm are sliced at intervals of 0.2, and bamboo veneers with a thickness greater than 0.8 mm are sliced at intervals of 0.5.

[0085] The bamboo sheet 2 is cut out from the bamboo board 1 by adjusting the distance between the splitting cutter and the fixed bottom plate 5 under the conditions that the temperature is kept at 50-70 DEG C and the moisture content is above 30%, and the bamboo sheet 2 is cut out from the bamboo board 1 by taking the bamboo green skin as the reference surface;

[0086] Then, the bamboo sheet 2 is cut out from the bamboo board 1 by taking 0.2 interval, and the thickness of the bamboo sheet 2 is 0.5 mm and 0.8 mm;

[0087] The bamboo sheet 2 is cold-pressed and placed under the action of the shaping device at a pressure of 1.0 MPa for 12 h;

[0088] The bamboo sheet 2 with the thickness of 0.3 mm, 0.5 mm and 0.8 mm is dried by adopting the multi-stage cycle process of vacuum, moisture removal, vacuum pressure preservation, moisture removal and pressure preservation in the vacuum environment with the negative pressure of 0.3 MPa;

[0089] The bamboo sheet 2 with the thickness of 1 mm and 2 mm is dried by adopting the continuous belt type, and the drying time is 30 min, and then the bamboo sheet 2 is placed under pressure;

[0090] The bamboo sheet 2 is cut out from the bamboo board 1 by taking 0.2 interval, and the thickness of the bamboo sheet 2 is 0.5 mm and 0.8 mm;

[0091] Table 2: Performance index of the bamboo sheet with different thickness

[0092]

[0093]

[0094] The first, second and third layers of the bamboo sheet 2 are used for preparing the bamboo straw and the bamboo cup, and the fourth, fifth and sixth layers of the bamboo sheet 2 are used for preparing the unmanned aerial vehicle shell member.

[0095] The above embodiment is used for helping to understand the method and the core idea of the present application; meanwhile, according to the idea of the present application, the specific embodiment and the application range can be changed by the person skilled in the art. Therefore, the content of the present application should not be understood as the limitation of the present application.

Claims

1. A method for processing bamboo, characterized by: The method is based on the natural gradient variation structure of bamboo, and the bamboo is classified according to the fiber content through end face vision, and the planing position and thickness are determined according to the different fiber content, so that the bamboo with uneven structure and performance is homogenized, that is, the single bamboo sheet is planed to make the performance of the bamboo sheet more uniform in each direction, reduce anisotropy, provide a stable structure and performance unit for the development of new bamboo materials with different performance requirements, realize the appropriate use and efficient use of bamboo, and specifically comprises the following steps: S100, the round bamboo stem is processed into a flattened bamboo board with a rectangular cross section; S200, the end face of the bamboo board is visually classified, the end face of the bamboo board is photographed, the fiber distribution of the end face of the bamboo board is obtained through color contrast and gray value analysis according to the different colors of fiber, parenchyma and conducting tissue; S300, a bamboo fiber distribution density model is established, the relative value of the outermost fiber content is 1, and the relative value of the innermost fiber content is 0, and a fiber distribution density diagram of the entire rectangular cross section of the bamboo board in the thickness direction is established; S400, according to the application requirement, the relative value interval of the fiber content is input, and the machine processing determines the sectioning position; S500, sectioning is performed according to the determined sectioning position; S600, the bamboo sheet obtained by sectioning is independently classified and cold-pressed according to different fiber content grades and different thicknesses; S700, the bamboo sheets with different thicknesses are dried respectively, and are stacked after drying; S800, the bamboo sheet application, different components are prepared according to the fiber content.

2. The bamboo processing method according to claim 1, characterized in that: Step S100 includes: S110, the round bamboo stem is cut into bamboo sections according to the required board length, and the bamboo sections are sectioned into arc-shaped bamboo pieces; S120, the arc-shaped bamboo pieces are processed into bamboo boards with a rectangular cross section.

3. The bamboo processing method according to claim 1, characterized in that: Step S500 includes: S510, a vacuum adsorption device is used to adsorb and fix the bamboo board; S520, a planing tool is used to perform equal-thickness reciprocating sectioning or unequal-thickness continuous sectioning along the axial direction of the bamboo board from the end face of the bamboo board.

4. The bamboo processing method according to claim 2, characterized in that: In step S120, the arc-shaped bamboo pieces with a width less than 4cm are planed into bamboo pieces with a rectangular cross section by planing the upper and lower surfaces; the arc-shaped bamboo pieces with a width greater than or equal to 4cm are prepared into bamboo boards with flat rectangular cross sections on the upper and lower surfaces by softening, flattening and shaping.

5. The bamboo processing method according to claim 2, characterized in that: The length of the bamboo section is not more than 2 meters.

6. The bamboo processing method according to claim 2, wherein: The width of the arc-shaped bamboo piece is between 2cm and 15cm.

7. The method of processing bamboo as claimed in claim 1, wherein: In step S700, the bamboo sheet is dried to a moisture content of less than or equal to 8%.

8. The method of processing bamboo as claimed in claim 1, wherein: The bamboo sheet with a thickness of less than or equal to 0.8mm is dried by vacuum drying; the bamboo sheet with a thickness greater than 0.8mm is dried by roll-type continuous drying.

9. The method of processing bamboo as claimed in claim 1, wherein: In step S400, the relative value interval of the fiber content is 0.1, 0.2 or 0.

3.

10. A processing device for bamboo for implementing the processing method according to any one of claims 1-9, characterized by: The vacuum adsorption device includes a fixed bottom plate, a plurality of vacuum suction channels are formed in the fixed bottom plate, a vacuum suction device is connected to the top of the vacuum suction channel through a pipeline, and the bottom of the fixed bottom plate is used to adsorb the bamboo board; a planing tool is arranged obliquely below one side of the vacuum adsorption device, the height of the planing tool can be adjusted, and the fixed bottom plate can drive the bamboo board to move horizontally along the planing tool.

11. The bamboo processing device according to claim 10, characterized in that: The plurality of planing cutters are arranged in the oblique lower side of the vacuum adsorption device, and the heights of the planing cutters are different.

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