Bamboo wood processing method and device

Abstract

The invention discloses a bamboo wood processing method and device, and relates to the field of material processing, and the method comprises the following steps: processing a round bamboo stalk into a bamboo plate with a rectangular cross section; visually grading the end surfaces of the bamboo boards; establishing a bamboo fiber distribution density model; determining a subdivision position, and carrying out subdivision along the radial direction according to a fiber content distribution relative value; the bamboo slices obtained through subdivision are subjected to independent graded cold pressing and aging; and the bamboo sheets with different thicknesses are stacked and stored after being subjected to vacuum drying and roller type continuous drying. The bamboo sheet subdivision device comprises a vacuum adsorption fixing device, the vacuum adsorption fixing device comprises a fixing device used for adsorbing bamboo sheets, and a vacuum pumping channel penetrating through a fixing bottom plate is formed in the fixing bottom plate. The bamboo sheet subdivision device can conduct layered processing in the radial direction of the bamboo wall according to fiber distribution, bamboo sheets with different fiber contents and the same / different thicknesses are prepared, and the bamboo sheet subdivision efficiency is improved. Uniform preparation and application of the gradient variation bamboo wood are achieved, the difference between units is eliminated, and materials and products which are high in strength and stable in performance are easier to prepare.

Description

Technical Field

[0001] The invention relates to the technical field of material processing, in particular to a bamboo material processing method and device. Background Art

[0002] Bamboo is a natural biomass gradient composite material. The appearance and performance of bamboo stalks vary greatly in height and diameter. Along the thickness of the bamboo wall, from green to yellow, the physical and mechanical properties of bamboo change gradually as the density of vascular bundle content distribution decreases.

[0003] The main processing and utilization methods of bamboo include round bamboo and bamboo artificial board. Among them, bamboo artificial board, such as bamboo integrated material, bamboo plywood, reconstituted bamboo, etc., are all processed into bamboo boards by gluing, assembling and pressing bamboo into standard bamboo strips, bamboo strips, bamboo bundles, etc.; however, at present, whether it is round bamboo or bamboo artificial board unit and board bamboo processing, bamboo is uniformly processed and utilized as a homogeneous material, and is not processed and utilized separately according to the gradient variation of bamboo structure and performance. This will not only affect the bamboo yield and processing energy consumption, but also the prepared units and boards will have structural and performance instability and easy deformation, which is not conducive to the structural design for subsequent use, resulting in the use of large materials for small purposes and the ordinary use of high-quality materials or the inferior use of high-quality materials, and the characteristics of bamboo cannot be fully utilized and bamboo cannot be used efficiently.

[0004] Therefore, it is urgent to design a technical solution to prepare bamboo sheets with different fiber contents and the same / different thicknesses by performing layered processing according to the fiber distribution along the radial direction of the bamboo wall. Summary of the invention

[0005] The purpose of the present invention is to provide a bamboo processing method and device to solve the problems existing in the above-mentioned prior art, and to be able to perform layered processing along the radial direction of the bamboo wall according to the fiber distribution, so as to prepare a single piece of bamboo sheet with uniform fiber content, while different pieces have different fiber contents and the same or different thicknesses.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present invention provides a bamboo processing method, which is based on the natural gradient variation structure of bamboo. The natural gradient variation structure of bamboo refers to a natural, gradual structural feature existing from the outside to the inside of the bamboo. This structural feature enables the bamboo to have different mechanical properties and physical properties in different parts, thereby giving the bamboo unique performance advantages. The processing method includes the following steps:

[0008] S100, processing the round bamboo stalks into flattened bamboo boards having a rectangular cross section;

[0009] S200, visual grading of bamboo board end surface, photographing the bamboo board end surface, and obtaining the distribution of fiber content on the bamboo board end surface through color contrast and gray value analysis based on the different shades of color of fibers, parenchyma and conductive tissues;

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

[0011] S400, according to application requirements, input the relative value interval of fiber content, such as 0.1 or 0.2 or 0.3, and the machine processes to determine the splitting position;

[0012] S500, performing segmentation according to the determined segmentation position;

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

[0014] S700, drying bamboo slices of different thicknesses respectively, and stacking and storing them after drying;

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

[0016] Optionally, step S100 includes:

[0017] S110, cutting the round bamboo stalks into bamboo segments according to the required length of the board, and splitting the bamboo segments into arc-shaped bamboo pieces;

[0018] S120, processing the curved bamboo pieces into bamboo boards with rectangular cross-sections.

[0019] Optionally, step S500 includes:

[0020] S510, uses vacuum adsorption device to adsorb and fix bamboo board;

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

[0022] Optionally, in step S120, curved bamboo strips with a width less than 4 cm are processed into bamboo strips with rectangular cross-sections by planing the upper and lower surfaces; curved bamboo strips 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 segment does not exceed 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 slices are dried to a moisture content of less than or equal to 8%.

[0026] Optionally, bamboo slices with a thickness of ≤0.8 mm are dried by vacuum drying; bamboo slices with a thickness of more than 0.8 mm are dried by roller continuous drying.

[0027] The present invention also provides a bamboo processing device, including a vacuum adsorption device, the vacuum adsorption device including a fixed bottom plate, a plurality of vacuum channels penetrating the fixed bottom plate are opened on the fixed bottom plate, the top of the vacuum channel is connected to the vacuum device through a pipeline, and the bottom of the fixed bottom plate is used for adsorbing bamboo board materials; a planing tool is provided at an oblique lower part of 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 materials to move horizontally along the planing tool.

[0028] Optionally, a plurality of planing tools are evenly arranged at an oblique lower portion of one side of the vacuum adsorption device, and the heights of the planing tools are all different.

[0029] Compared with the prior art, the present invention has achieved the following technical effects:

[0030] The present invention is based on the natural gradient variation structure of bamboo. The bamboo is graded according to the fiber content through end face vision, and the sliced ​​position and thickness are determined according to the different fiber contents, so that the bamboo with uneven structure and performance is homogenized, that is, the performance of a single bamboo slice sliced ​​from the bamboo is more uniform in all directions, and the anisotropy is reduced. A unit with stable structure and performance is provided for the research and development of new bamboo materials with different performance requirements, thereby realizing the appropriate application and efficient utilization of bamboo. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 The figure is a schematic diagram of the process of the bamboo material processing method of the present invention;

[0033] Figure 2 It is a schematic diagram of the end surface images of the bamboo pieces and bamboo boards of the present invention after grayscale processing;

[0034] Figure 3 It is a schematic diagram of the vascular bundle distribution density model from the outer layer to the inner layer of the end surface of the bamboo slice and the bamboo board of the present invention;

[0035] Figure 4This is the position diagram of the cross section of bamboo material with equal thickness;

[0036] Figure 5 It is a schematic diagram of the arrangement of the vacuum adsorption device and the planing tool during equal thickness sectioning;

[0037] Figure 6 Schematic diagram of bamboo slice preparation for equal thickness segmentation;

[0038] Figure 7 It is a schematic diagram of the arrangement of the vacuum adsorption device and the planing tool for unequal thickness sectioning;

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

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

[0041] Fig.10 It is a schematic diagram of the local structure of the vacuum adsorption device;

[0042] Fig.11 for Fig.10 A schematic diagram of the main cross-section of

[0043] Fig.12 for Fig.10 Schematic side cross-sectional view of .

[0044] In the figure: 1-bamboo board, 2-bamboo slice, 3-slicing tool, 4-vascular bundle, 5-fixed bottom plate, 6-vacuum channel. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] The purpose of the present invention is to provide a bamboo processing method and device to solve the problems existing in the above-mentioned prior art, and to be able to perform layered processing along the radial direction of the bamboo wall according to the fiber distribution, so as to prepare a single piece of bamboo sheet with uniform fiber content, while different pieces have different fiber contents and the same or different thicknesses.

[0047] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0048] refer to Figures 1 to 12As shown, the present invention provides a bamboo processing method, which follows the gradient variation structure and performance of the bamboo itself, and is graded according to the different fiber contents at different positions in the radial direction through end face visual measurement. The bamboo is first standardized in size and cross-section specifications, and then layered according to the fiber distribution along the radial direction of the bamboo wall to prepare bamboo sheets with different fiber contents, different performances, and the same / different thicknesses; the purpose is to achieve reasonable, efficient, and scientific utilization of bamboo through controllable, flexible grading and homogenized segmentation. The method includes the following steps:

[0049] Pre-processing of cutting the round bamboo stalks: cutting the round bamboo stalks into bamboo segments of a certain length according to the required board length. Based on the taper of the bamboo material in the length direction, the length of the bamboo segment shall not exceed 2 meters;

[0050] The bamboo segments are split into curved bamboo pieces with a width of 2 cm to 15 cm and a certain curvature through a bamboo splitter. The bamboo splitter is a mechanical device used to split the whole bamboo into bamboo pieces or bamboo strips according to the required size. It is a known device and will not be described in detail.

[0051] The curved bamboo pieces with a width less than 4 cm are sliced ​​on the upper and lower surfaces by a slicer 3 to be processed into bamboo pieces with rectangular cross-sections; the curved bamboo pieces with a width greater than or equal to 4 cm are softened by softening, flattening and shaping, and then flattened under the action of an external force to prepare bamboo boards 1 with flat upper and lower surfaces; the ends of the bamboo pieces or bamboo boards with rectangular cross-sections are sawed to form flat, undamaged cross-sections, so that the end surface can clearly distinguish the distribution of vascular bundles 4, that is, fiber distribution;

[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 ≥30fps; according to the different shades of color of vascular bundle 4, parenchyma tissue and conducting tissue, through color contrast and gray value analysis, the gray value of vascular bundle 4 is 255, and the gray value of parenchyma tissue is 0, and the end surface grayscale processing is performed, and the content of vascular bundle 4 is used as the fiber content, so as to obtain the distribution of fiber content on the end surface of bamboo board 1;

[0053] Establish a vascular bundle 4 distribution density model from green to yellow in the bamboo radial direction, that is, a vascular bundle 4 distribution density model from the outermost layer to the innermost layer of bamboo, with the relative value of the vascular bundle 4 content in the outermost layer being 1 and the relative value of the vascular bundle 4 content in the innermost layer being 0, and establish a vascular bundle 4 distribution density map in the thickness direction of the entire rectangular cross section of the bamboo board 1;

[0054] The bamboo board 1 is processed in a controlled manner, and the end face splitting position of the bamboo board 1 is determined at intervals of 0.1, 0.2 or 0.3 relative values ​​according to the relative value of the fiber content distribution;

[0055] A high-stability vacuum adsorption device is used to fix the bamboo board 1. The reference surface on the top of the bamboo board 1 is fixed by a fixed bottom plate 5. The bamboo board 1 is fixed by continuous vacuuming. The vacuum degree is 0.8 to 2 atmospheres, which ensures the flatness and strong fixation of the split bamboo board 1, ensures the stability of the bamboo board 1 during the splitting process, and ensures that the bamboo board 1 is completely split in the thickness direction, reduces the bamboo board 1 that cannot be completely split due to the mechanical fixing device, and avoids the remaining bamboo board 1 with a large thickness;

[0056] Equal thickness or unequal thickness splitting can be performed in the thickness direction of the bamboo wall; equal thickness splitting can also be performed according to a certain thickness, with a thickness specification of 0.05mm-2mm;

[0057] When the single piece of equal thickness is reciprocated, the green side of the top of the bamboo board 1 is used as the reference plane, and the distance between the planing tool 3 and the lower surface of the bamboo board 1 to be planed, that is, the lower surface of the bamboo flat plate, is adjusted. The planing tool 3 is fixed by a fixed clamping device, and a three-dimensional moving device is used to control the movement of the vacuum adsorption device, thereby driving the bamboo board 1 to move back and forth to perform planing piece by piece; the green side of the bamboo board 1 is used as the reference plane, and the adsorption surface of the vacuum adsorption device is closely combined with the green side of the bamboo board 1. The lower surface of the bamboo board 1 away from the green side is the first planing surface, and the vacuum adsorption device fixes the bamboo board 1 for reciprocating planing. Each time the bamboo board is planed, the vacuum adsorption device drives the bamboo board 1 to move back and forth. It will move down a little, and control the gap between the lower surface of the bamboo board 1 and the tool to be the thickness of the slices to be sliced; the three-dimensional moving device is a known structure, and the Z-axis moving device can be used to control the height position of the vacuum adsorption device and the bamboo board 1, so as to determine the thickness of the bamboo slices 2 sliced ​​each time. The Z-axis moving device can be realized by a lifting cylinder, a vertical slide rail and a vertical slider structure, or a vertically arranged screw nut structure. The reciprocating movement of the bamboo board 1 is realized by the X-axis moving device. Each time the movement is reversed, the height of the bamboo board 1 from the slicer 3 is adjusted according to the sliced ​​thickness. The X-axis moving device also adopts a known structure, so it is not repeated.

[0058] When continuously splitting with different thicknesses, the green or yellow surface of the bamboo is used as the reference surface, and a plurality of slicers 3 with different heights are arranged in sequence, and the vertical gap between each slicer 3 and the reference surface is different. The X-axis moving device drives the vacuum adsorption device and the bamboo board 1 to move in sequence in one direction, so that the plurality of slicers 3 are passed in sequence to realize continuous splitting of bamboo pieces with different thicknesses. The splitting method in the present invention is splitting or slice cutting. The splitting method is used for the thickness ≥ 0.8 mm, and the slice cutting method is used for the thickness < 0.8 mm.

[0059] The split bamboo slices 2 are graded and stored according to different fiber content levels and different thicknesses. The slices are stacked in layers in the thickness direction, with a single stack thickness of ≤10 cm, and then stacked and stored under pressure for ≥4 hours;

[0060] Different forms of drying are performed on bamboo slices 2 with different thicknesses, wherein the bamboo slices 2 with a thickness of ≤0.8 mm are dried by vacuum drying; vacuum drying is a known technology and is a method of drying under vacuum and below atmospheric pressure. Under vacuum conditions, the boiling point of water decreases and the evaporation rate increases, thereby accelerating the drying rate at a lower temperature. Vacuum drying is a method of stacking bamboo slices 2 in a closed container and heating them under conditions below atmospheric pressure for drying. Under negative pressure conditions, the boiling point of water decreases, thereby allowing the moisture inside the bamboo slices 2 to boil and vaporize rapidly at a lower temperature, increasing the water vapor pressure to form a water vapor pressure gradient with high inside and low outside. Most of the moisture inside the bamboo slices 2 seeps outward in the form of steam under the action of this pressure gradient. Therefore, a faster drying speed can be obtained while ensuring the drying quality. Bamboo slices 2 with a thickness greater than 0.8 mm are dried by roller continuous drying, which is a known mature technology and will not be described in detail; drying until the moisture content is less than or equal to 8%;

[0061] Application of bamboo thin slices 2: bamboo thin slices 2 with high fiber content can be used to prepare high-strength boards or components; bamboo thin slices 2 with low fiber content can be used to prepare packaging materials with low density and good toughness or non-structural components.

[0062] The bamboo processing device of the present invention comprises a planing tool 3, a drying device, a high-speed camera, and a vacuum adsorption device, wherein the planing tool 3, the drying device, and the high-speed camera all adopt existing known devices, and the vacuum adsorption device is installed on an existing three-dimensional moving device. The vacuum adsorption device comprises a fixed base plate 5, and a plurality of vacuum channels 6 penetrating the fixed base plate 5 are opened on the fixed base plate 5. The top of the vacuum channel 6 is connected to a vacuum device, such as a vacuum pump, through a pipeline. The bottom of the fixed base plate 5 is a plane structure or a smooth arc structure with an inward concave shape, and its bottom is used to adsorb the upper surface of the bamboo board 1. The vacuum channel 6 is continuously vacuumed by the vacuum device, so that a negative pressure is formed between the bamboo board 1 and the fixed base plate 5, and the fixed base plate 5 fixes and adsorbs the main material; a planing tool 3 is provided at an oblique lower portion of one side of the vacuum adsorption device, and the height of the planing tool 3 can be adjusted, and the fixed base plate 5 can drive the bamboo board 1 to move horizontally along the planing tool 3.

[0063] Embodiment 1

[0064] Bamboo is a natural biomass gradient composite material. The appearance size and performance of bamboo stalks have great variability in the height and diameter direction of bamboo stalks. This example takes bamboo as an example. In the height direction of bamboo stalks, the diameter can be reduced from 14cm to 6cm when the height increases from 0.5m to 6.5m, and the basic density increases from 0.696g / cm 3 Increased to 0.793 g / cm 3, the compression strength increased from 45MPa to 65MPa, and the tensile strength increased from 180MPa to 212MPa. Bamboo wall is a composite material composed of 52% (volume ratio) thin-walled tissue, 40% fibrous tissue and 8% conductive tissue. Vascular bundle 4 is used as a reinforcement, and its tensile strength and modulus are as high as 656.24MPa and 37.19GPa, which are more than ten times that of thin-walled cells (40.02MPa and 1.7GPa), and along the thickness direction of the bamboo wall, from green bamboo to yellow bamboo, the physical and mechanical properties of bamboo change gradually with the decreasing density gradient of vascular bundle 4 content. The theoretical tensile strength of bamboo in the green bamboo part with vascular bundle 4 content of 80% can reach 750MPa, while the tensile strength of bamboo in the yellow bamboo part with vascular bundle 4 content of 15% is only 150MPa. The air-drying shrinkage rate of green bamboo is 19% higher than that of yellow bamboo.

[0065] The processing steps of the bamboo material of the present embodiment are as follows:

[0066] The cut bamboo segments purchased from the market are 1.2m long, with a small end diameter greater than 10cm and a small end wall thickness greater than 8mm;

[0067] The bamboo segments are graded according to the 1mm thickness interval, such as 8.5-9.4mm is the 9mm grade, 9.5-10.4mm is the 10mm grade, 10.5-11.4mm is the 11mm grade, and so on;

[0068] Splitting bamboo segments: Splitting bamboo segments with the same wall thickness grade through a bamboo splitting machine to produce 9cm wide curved bamboo pieces;

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

[0070] According to the known bamboo flattening process, the softened curved bamboo pieces are flattened to retain the green color of the bamboo;

[0071] Fixing the flattened bamboo board 1 under a vacuum degree of 1 atmosphere by a vacuum adsorption fixing device;

[0072] The end surface of the bamboo board 1 is photographed and recorded by a camera, and grayscale 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 0.2 is used as the segmentation interval to perform grading, and the number of segmentation layers and the segmentation position are determined;

[0073] Select the planing method, keep the temperature at 50-70℃ and the moisture content at more than 30%, adjust the distance between the material splitting tool and the fixed bottom plate 5, take the green surface of the bamboo as the reference surface, and split the green bamboo board 1 after flattening into a first layer of bamboo slices with a thickness of 0.5mm and dense fiber content;

[0074] Then, the split bamboo board 1 is split for the second, third, and fourth times in sequence until all the bamboo pieces are split;

[0075] Bamboo slices 2 cold pressing and aging: The split bamboo green skin is shaped by a shaping device under a pressure of 1.0 MPa for 12 hours;

[0076] Adopt a vacuum environment with a negative pressure of 0.3MPa to carry out a multi-stage cycle process of vacuum, dehumidification, vacuum pressure maintenance, dehumidification, and pressure maintenance for drying;

[0077] The 8 mm thick bamboo board 1 is divided into bamboo sheets 2 from the outermost layer to the inner layer. The fiber content and tensile properties of the 1st, 3rd, 5th and 7th layers are calculated as shown in Table 1:

[0078] Table 1 Performance indexes of bamboo pieces of equal thickness cut at different positions of bamboo wall

[0079]

[0080]

[0081] Applications of bamboo sheets 2 with different modulus and strength: Bamboo sheets 2 with high modulus, high strength and high fiber content can be used in fields with high strength requirements, such as wind turbine blades and drone wings. Bamboo sheets 2 with low performance can be used in the preparation of bamboo boards and easily bendable components such as one-time formed curved frames, furniture, etc.

[0082] Embodiment 2

[0083] This embodiment is an improvement on the first embodiment. On the basis of the first embodiment, the end face of the bamboo board 1 is photographed and recorded by a camera, and grayscale 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, and the fiber content of the end face is graded with a segmentation interval of 0.1;

[0084] Select 0.1 as the grading interval to slice the bamboo thin slice 2 with a thickness of 0.3 mm, use 0.2 as the grading interval to slice the bamboo thin slice 2 with a thickness of 0.5 mm and 0.8 mm, and use 0.5 as the grading interval to slice the bamboo veneer with a thickness of more than 0.8 mm;

[0085] By slicing, under the condition that the temperature is kept at 50-70°C and the moisture content is above 30%, the distance between the material splitting tool and the fixed bottom plate 5 is adjusted, and the bamboo board 1 is sliced ​​into 0.3 thick fiber-dense bamboo slices 2 with the green surface of the bamboo as the reference surface;

[0086] Then, the split bamboo board 1 is split into bamboo sheets 2 with thickness of 0.5 and 0.8 mm at intervals of 0.2; and the bamboo sheets 2 with thickness of 1 mm and 2 mm are split into bamboo sheets 2 with intervals of 0.5;

[0087] Bamboo slices 2 cold pressing and aging: The split bamboo green skin is shaped by a shaping device under a pressure of 1.0 MPa for 12 hours;

[0088] Bamboo sheets 2 with thickness of 0.3mm, 0.5mm and 0.8mm were dried by a multi-stage cycle process of vacuum, dehumidification, vacuum pressure maintenance, dehumidification and pressure maintenance in a vacuum environment with a negative pressure of 0.3MPa;

[0089] Bamboo sheets 2 with a thickness of 1 mm and 2 mm were dried by continuous belt method for 30 min and then pressed and aged;

[0090] The bamboo sheets 2 are cut from the outermost layer to the inner layer, and the fiber content and tensile properties of the 1st, 3rd, 5th and 7th layers are calculated, as shown in Table 2:

[0091] Table 2 Performance indexes of bamboo slices with different thicknesses

[0092]

[0093]

[0094] The first, second and third layers of bamboo sheets 2 of this embodiment are used for preparing winding bamboo straws and bamboo cups; the fourth, fifth and sixth layers of bamboo sheets 2 are used for preparing unmanned aircraft shell components.

[0095] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A bamboo material processing method, characterized in that: The steps include: S100, processing the round bamboo stalks into flattened bamboo boards having a rectangular cross section; S200, visual grading of bamboo board end surface, photographing the bamboo board end surface, and obtaining the fiber distribution of the bamboo board end surface through color contrast and gray value analysis based on the different shades of color of the fibers, parenchyma and conductive tissues; S300, establishing a bamboo fiber distribution density model, taking the relative value of the fiber content of the outermost layer as 1 and the relative value of the fiber content of the innermost layer as 0, and establishing a fiber distribution density map in the thickness direction of the entire rectangular cross section of the bamboo board; S400, according to application requirements, input the relative value interval of fiber content, such as 0.1 or 0.2 or 0.3, and the machine processes to determine the splitting position; S500, performing segmentation according to the determined segmentation position; S600, the bamboo slices obtained by splitting are independently graded and cold pressed according to different fiber content levels and thicknesses; S700, drying bamboo slices of different thicknesses respectively, and stacking and storing them after drying; S800, bamboo veneer application, different components are prepared according to the fiber content.

2. The bamboo material processing method according to claim 1, characterized in that: Step S100 includes: S110, cutting the round bamboo stalks into bamboo segments according to the required length of the board, and splitting the bamboo segments into arc-shaped bamboo pieces; S120, processing the curved bamboo pieces into bamboo boards with rectangular cross-sections.

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

4. The bamboo material processing method according to claim 2, characterized in that: In step S120, the curved bamboo pieces with a width less than 4 cm are planed on the upper and lower surfaces to be processed into bamboo pieces with rectangular cross-sections; the curved bamboo pieces with a width greater than or equal to 4 cm are softened, flattened, and formed to be prepared into bamboo boards with flat rectangular cross-sections on the upper and lower surfaces.

5. The bamboo material processing method according to claim 2, characterized in that: The length of the bamboo segment does not exceed 2 meters.

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

7. The bamboo material processing method according to claim 1, characterized in that: In step S700, the bamboo slices are dried to a moisture content of less than or equal to 8%.

8. The bamboo material processing method according to claim 1, characterized in that: Bamboo slices with a thickness of ≤0.8mm are dried by vacuum drying; bamboo slices with a thickness greater than 0.8mm are dried by roller continuous drying.

9. A bamboo processing device, characterized in that: It comprises a vacuum adsorption device, which comprises a fixed bottom plate, on which a plurality of vacuum extraction channels which penetrate the fixed bottom plate are opened, the tops of the vacuum extraction channels are connected with the vacuum extraction device through pipelines, and the bottom of the fixed bottom plate is used for adsorbing bamboo board materials; 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 materials to move horizontally along the planing tool.

10. The bamboo material processing device according to claim 9, characterized in that: A plurality of planing tools are evenly arranged obliquely below one side of the vacuum adsorption device, and the heights of the planing tools are all different.

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