CN109049239B - Whole bamboo fiber opening machine and fiber opening method thereof - Google Patents

Abstract

The invention provides a whole bamboo fiber opening machine and a fiber opening method thereof. The invention has the following advantages: the whole bamboo is clamped by the positioning and clamping device, the whole bamboo is automatically pushed by the pushing device, and the whole bamboo is opened by the fiber opening device; the whole bamboo material stably moves in the positioning and clamping device, a large amount of fixed-length bamboo fibers can be quickly and effectively prepared at one time, the utilization rate of the bamboo material is improved, the production time of the bamboo fibers is saved, the working efficiency is improved, the thickness of the prepared bamboo fibers is uniform, the length is controllable, the damage degree to the strength of the fibers is low, and the fibrilia bamboo fibers with excellent mechanical properties can be obtained.

Description

Whole bamboo fiber opening machine and fiber opening method thereof

Technical Field

The invention relates to bamboo fiber opening equipment, in particular to a whole bamboo fiber opening machine and a fiber opening method thereof.

Background

The preparation of the high-quality bamboo fiber lays a solid material foundation for the development and utilization of green bamboo fiber products, and the natural plant fiber replaces the traditional chemical fiber measure to realize the reasonable utilization of resources. With the vigorous development of the emerging industry of bamboo fibers, the application of bamboo fibers has been transformed and upgraded from the simple utilization of the traditional textile industry to sustainable application development.

In the prior art, softening and removing the bamboo, firstly, selecting 0.5-2.5-year fresh bamboo, such as Ci bamboo, green bamboo, mao bamboo and the like, and classifying the bamboo according to different thickness of the outer diameter and whether obvious defects exist, wherein the defects mainly comprise excessive bending, breaking and the like; and selecting the bamboo materials with similar outer diameter intervals and good straightness for bamboo partition removal treatment, namely opening all the bamboo partitions in the whole bamboo material. And then the whole bamboo is subjected to softening treatment such as steaming, fire baking or alkali liquor water bath.

At present, the mode of industrially obtaining bamboo fibers is mainly to treat softened bamboo materials in a rolling mode to enable bamboo chips to generate cracks, and then to separate the bamboo chips after the bamboo chips become soft and thin. In the case of preparing fiber by rolling and crushing, the rolling force cannot be well matched with bamboo tubes and bamboo chips with different specifications, so that stress on each part of the bamboo is uneven, and generated crack distribution is uneven, thereby affecting the acquisition of coarse fiber of the bamboo; the bamboo fibers are also produced by a carding method, which usually adopts a mechanical carding roller to comb the softened bamboo chips into coarse bamboo fibers. Whether the rolling method or the carding method is adopted, the external load is unreasonable in action mode due to the characteristics of large difference of bamboo diameters of bamboos, and the external load is unmatched with the stress of the bamboo chips, so that the processed bamboo fibers are different in length and thickness, and the strength of the fibers is damaged to different degrees. Thereby leading to high cost of high-quality bamboo fiber, low yield of bamboo fiber and directly influencing the later processing cost.

Disclosure of Invention

The invention aims to solve the technical problems of providing a whole bamboo fiber opening machine and a fiber opening method thereof, wherein a whole bamboo is clamped by a positioning clamping device, a pushing device automatically pushes the whole bamboo, and the whole bamboo is subjected to fiber opening treatment by the fiber opening device, so that a large amount of fixed-length bamboo fibers can be rapidly and effectively prepared at one time, the working efficiency is high, and the thickness of the prepared bamboo fibers is uniform.

The invention is realized in the following way:

the utility model provides a whole bamboo fiber opening machine, includes frame, fiber opening device, location clamping device and advancing device, fiber opening device fixed connection in the head end of frame, advancing device sliding connection in the frame, advancing device slides between the head end and the terminal of frame, location clamping device is located fiber opening device with between the advancing device, location clamping device sliding connection in the frame.

Further, the fiber opening device comprises a conical die, wherein the conical die comprises a connecting part and a conical part, and the conical part is fixedly connected with the head end of the frame through the connecting part.

Further, the propulsion device comprises a propulsion block, a first hydraulic cylinder and an oil tank, one end of the first hydraulic cylinder is connected with the propulsion block, the other end of the first hydraulic cylinder is connected with the oil tank, and the propulsion block is slidably connected with the frame.

Further, the positioning and clamping device comprises a support, a position sensor and a locking piece, wherein the support is connected to the frame in a sliding manner through the locking piece, the position sensor is connected with the locking piece in a control manner, and the position sensor can detect the distance between the position sensor and the propelling device.

Further, the positioning and clamping devices are plural, the rack is provided with a track with a concave groove, and the positioning and clamping devices are slidably connected to the track.

Further, each positioning and clamping device further comprises a clamping hoop capable of sleeving the bamboo wood, and the clamping hoops are fixedly connected to the support.

Further, each positioning and clamping device further comprises a bolt, a supporting block and a spring, wherein the clamping hoop is divided into an upper clamping hoop and a lower clamping hoop, the upper clamping hoop and the lower clamping hoop are respectively and slidably connected with the bolts, the lower clamping hoop is fixedly connected with the support, and the spring is sleeved on the bolts and is positioned between the upper clamping hoop and the lower clamping hoop, and the bolts are fixedly connected with the supporting block.

Further, each positioning and clamping device further comprises a second hydraulic oil cylinder, one end of the second hydraulic oil cylinder is fixedly connected with the lower clamp, and the other end of the second hydraulic oil cylinder is fixedly connected with the supporting block.

Further, each positioning and clamping device further comprises a plurality of pressure sensors and a plurality of pressure controllers, the pressure sensors are fixedly connected to the inner surfaces of the upper clamping hoop and the lower clamping hoop, the pressure sensors can detect clamping pressure of the upper clamping hoop and the lower clamping hoop to bamboo materials, the pressure controllers are connected with the pressure sensors, and the pressure controllers are connected with the second hydraulic oil cylinder in a control mode.

The whole bamboo fiber opening method comprises the following steps of:

s10, the fiber opening device is propped against one end of the whole bamboo material, the propelling device is propped against the other end of the whole bamboo material, and the positioning and clamping device clamps the middle of the whole bamboo material;

s20, adjusting the positions of the positioning and clamping devices on the tracks of the rack according to the diameters of the bamboo materials and the density degree of bamboo joints;

s30, pushing the bamboo wood by the pushing device.

Further, the positioning and clamping device further includes a locking member, and step S21 is further included after step S20:

s21, locking the positioning and clamping device on the rack through a locking piece;

further, the positioning and clamping device further comprises a position sensor, and further comprises a step S22 after the step S21 and a step 31 after the step S30:

s22, setting a default distance value between the position sensor and the propulsion device;

s31, detecting and recording actual distance values between the position sensors and the propulsion device; the locking member is released when the actual distance value between the propulsion device and the position sensor is equal to the default distance value.

Further, the positioning and clamping device further comprises a pressure controller, a pressure sensor and a second hydraulic cylinder, wherein the positioning and clamping device further comprises a step S23 after the step S22 and a step S32 after the step S31:

s23, setting a pressure default value of the pressure controller;

s32, when the clamping pressure value detected by the pressure sensor is smaller than the pressure default value, the clamping pressure is indicated to be too small, and at the moment, the pressure controller controls the second hydraulic cylinder to extend so as to further clamp the bamboo wood; and when the clamping pressure value detected by the pressure sensor is larger than the pressure default value, the clamping pressure is indicated to be too large, and the pressure controller controls the second hydraulic cylinder to shrink so as to reduce the clamping pressure on the bamboo wood.

The invention has the following advantages: according to the whole bamboo fiber opening machine and the whole bamboo fiber opening method, the whole bamboo is clamped by the positioning clamping device, the whole bamboo is automatically pushed by the pushing device, and the whole bamboo is opened by the fiber opening device; the whole bamboo material stably moves in the positioning and clamping device, a large amount of fixed-length bamboo fibers can be quickly and effectively prepared at one time, the utilization rate of the bamboo material is improved, the production time of the bamboo fibers is saved, the working efficiency is improved, the thickness of the prepared bamboo fibers is uniform, the length is controllable, the damage degree to the strength of the fibers is low, and the fibrilia bamboo fibers with excellent mechanical properties can be obtained.

Drawings

The invention will be further described with reference to examples of embodiments with reference to the accompanying drawings.

Fig. 1 is a perspective view of the whole bamboo fiber opening machine of the present invention.

Fig. 2 is a front view of the whole bamboo fiber opener of the present invention.

Fig. 3 is a schematic structural view of the positioning and clamping device of the present invention.

Fig. 4 is a schematic view of the structure of the conical die in the present invention.

Reference numerals in the drawings denote:

the device comprises a frame, a rail, a 2-fiber opening device, a 21-conical die, a 211-connecting part, a 212-conical part, a 3-positioning clamping device, a 31-support, a 32-position sensor, a 33-locking piece, a 34-bolt, a 35-supporting block, a 36-upper clamping hoop, a 37-lower clamping hoop, a 38-spring, a 39-second hydraulic cylinder, a 310-pressure sensor, a 311-pressure controller, a 4-propelling device, a 41-propelling block, a 42-first hydraulic cylinder, a 43-oil tank, a 44-sensor, a 5-control device and 6-bamboo.

Detailed Description

Referring to fig. 1 to 4, a whole bamboo fiber opening machine comprises a frame 1, a fiber opening device 2, a positioning and clamping device 3 and a pushing device 4, wherein the fiber opening device 2 is fixedly connected to the head end of the frame 1, the pushing device 4 is slidably connected to the frame 1, the pushing device 4 slides between the head end and the tail end of the frame 1, the positioning and clamping device 3 is located between the fiber opening device 2 and the pushing device 4, and the positioning and clamping device 3 is slidably connected to the frame 1. When in a working state, the positioning and clamping device 3 clamps the whole bamboo material 6, the pushing device 4 is positioned at the tail end of the frame 1 and props against one end of the bamboo material 6, the fiber opening device 2 props against the other end of the bamboo material 6, the pushing device 4 automatically pushes the whole bamboo material 6, the bamboo material 6 can move in the positioning and clamping device, and the bamboo material 6 is split into fibers under the action of the fiber opening device 2.

The fiber opening device 2 comprises a conical die 21, the conical die 21 comprises a connecting part 211 and a conical part 212, and the conical part 212 is fixedly connected with the head end of the frame 1 through the connecting part 211. Wherein, the material of the conical die 21 is metal, and the conical portion 212 of the conical die 21 is propped against the other end of the bamboo material 6 when in use, so that the bamboo material 6 is split into fibers under the extrusion of the conical portion 212 of the conical die 21.

The propulsion device 4 comprises a propulsion block 41, a first hydraulic cylinder 42 and an oil tank 43, one end of the first hydraulic cylinder 42 is connected with the propulsion block 41, the other end of the first hydraulic cylinder 42 is connected with the oil tank 43, and the propulsion block 41 is slidably connected with the frame 1. Wherein, a motor (not shown) is used as a power source, a hydraulic system is used as a power transmission unit, and the motor (not shown) drives a hydraulic pump to drive the hydraulic system, so that when oil in an oil tank 43 enters a first hydraulic oil cylinder 42, the first hydraulic oil cylinder 42 stretches out, and a propulsion block 41 drives bamboo 6; when the oil of the hydraulic cylinder returns to the oil tank 43, the first hydraulic cylinder 42 contracts, and the propulsion block 41 retreats; the hydraulic system provides stable flexibly-adjustable load, so that the pressure of the pushing block on the bamboo material and the feeding speed of the pushing block on the frame are controlled by adjusting the flow of the hydraulic system, and flexible fiber opening of the bamboo material in different states is realized. Wherein the first hydraulic ram 42 is a telescopic multi-stage hydraulic ram; the control device 5 of the whole bamboo fiber opening machine controls the operation of a motor (not shown).

The positioning and clamping device 3 comprises a support 31, a position sensor 32 and a locking piece 33, wherein the support 31 is connected with the frame 1 in a sliding way through the locking piece 33, the position sensor 32 is connected with the locking piece 33 in a control way, and the position sensor 32 can detect the distance between the position sensor 32 and the propelling device 4. The locking member 33 comprises a clamping mechanism and an electric control mechanism, wherein the clamping mechanism and the electric control mechanism are common components in the prior art, the clamping mechanism can clamp the rack, and the electric control mechanism controls the clamping and the loosening of the clamping mechanism according to the received electric signal of the position sensor 32; thus, the locking piece 33 can lock the positioning and clamping device 3 on the frame 1, and the locking state and the unlocking state of the locking piece 33 are controlled by the position sensor 32; the position sensor 32 is also connected to the control device 5; the clamping and unclamping of the locking member 33 can thus also be controlled by means of a button on the control device 5. Preferably, the position sensor 32 has the function of a distance meter, the position sensor 32 detecting the distance to the propulsion device 4 based on the distance measuring principle using the distance meter. Before clamping the bamboo 6, a closing signal is sent to the position sensor 32 through a corresponding button on the control device 5, the position sensor 32 controls the locking piece 33 to be loosened, and at the moment, the position of the positioning and clamping device 3 on the frame 1 can be adjusted; after the bamboo 6 is clamped, an opening signal is sent to the position sensor 32 through a corresponding button in the control device 5, the position sensor 32 controls the locking piece 33 to clamp, and the position of the positioning and clamping device 3 on the frame 1 is locked at the moment; the position sensor 32 then detects and records the actual distance value from the propulsion device 4 and sets a default distance value between the position sensor 32 and the propulsion device 4. As the pusher block 41 of the pusher 4 is advanced on the frame 1, the distance between the pusher block 41 and the positioning and clamping device 3 is reduced, and when the actual distance between the pusher block 41 and the position sensor 32 is equal to the default distance value, the position sensor 32 controls the locking member 33 to be released, and the positioning and clamping device 3 can move forward along the track 11 of the frame 1 and the bamboo 6. Preferably, the pushing block 41 is fixedly provided with the sensor 44, and the position sensor 32 can identify the sensor 44, so that the position sensor 32 can more accurately detect the distance between the pushing block 41 and the pushing device 4, and the interference of other objects on the distance measurement is greatly reduced. The control level of the button of the control device 5 is higher than the control of the position sensor 32 by ranging for controlling the locking state and the unlocking state of the locking member 33, so that the operator can flexibly operate according to the actual situation, and the situation that the locking member cannot be unlocked when the ranging function of the position sensor 32 fails is avoided.

The positioning and clamping devices 3 are provided with a plurality of rails 11 with concave grooves, and the positioning and clamping devices 3 are connected with the rails 11 in a sliding mode. Therefore, a plurality of positions of the bamboo 6 are clamped by the positioning and clamping devices 3, and the phenomenon of instability of the bamboo 6 in the axial compression process is effectively prevented; the position sensor 32 of each positioning and clamping device 3 is provided with a corresponding sensor 44 with a default distance value and capable of identifying the pushing block 41, and when the pushing block 41 continuously advances, the distance between the pushing block 41 and each positioning and clamping device 3 continuously decreases, so that the locking piece 33 of each positioning and clamping device 3, which is close to the pushing block 41, is unlocked in sequence. Wherein the unlocking state of the locking member of the positioning and clamping device 3 closest to the conical die 21 is controlled only by the control device 5.

Each positioning and clamping device 3 further comprises a clamp which can be sleeved on the bamboo 6, and the clamp is fixedly connected to the support 31. Each positioning and clamping device 3 further comprises a bolt 34, a supporting block 35 and a spring 38, the clamping bands are divided into an upper clamping band 36 and a lower clamping band 37, the upper clamping band 36 and the lower clamping band 37 are respectively connected with the bolts 34 in a sliding manner, the lower clamping band 37 is fixedly connected with the support 31, the spring 38 is sleeved on the bolts 34 and is positioned between the upper clamping band 36 and the lower clamping band 37, and the bolts 34 are fixedly connected with the supporting block 35. Thus, the bamboo 6 can be clamped more conveniently.

Each positioning and clamping device 3 further comprises a second hydraulic cylinder 39, one end of the second hydraulic cylinder 39 is fixedly connected with the lower clamp 37, and the other end of the second hydraulic cylinder 39 is fixedly connected with the supporting block 35. Thus, the clamping force of the bamboo 6 between the upper clamp 36 and the lower clamp 37 can be adjusted by the extension and contraction of the second hydraulic cylinder 39. The second hydraulic cylinder 39 is a small hydraulic cylinder.

Each positioning and clamping device 3 further comprises a plurality of pressure sensors 310 and a plurality of pressure controllers 311, the pressure sensors 310 are fixedly connected to the inner surfaces of the upper clamping hoop 36 and the lower clamping hoop 37, the pressure sensors 310 can detect the clamping pressure of the upper clamping hoop 36 and the lower clamping hoop 37 on the bamboo 6, the pressure controllers 311 are connected with the pressure sensors 310, and the pressure controllers 311 are in control connection with the second hydraulic cylinders 39. In this way, the pressure sensor 310 detects the clamping pressure of the upper clamping hoop 36 and the lower clamping hoop 37 on the bamboo 6, and transmits a pressure signal to the pressure controller 311, and the pressure controller 311 controls the expansion and contraction of the second hydraulic cylinder 39 according to the comparison result with the preset default pressure value; when the pressure value detected by the pressure sensor 310 is smaller than the pressure default value, the clamping pressure is too small, and the pressure controller 311 controls the second hydraulic cylinder 39 to stretch out, so that the bamboo is further clamped; when the pressure value detected by the pressure sensor 310 is greater than the pressure default value, the clamping pressure is too large, and the pressure controller 311 controls the second hydraulic cylinder 39 to shrink so as to reduce the clamping pressure on the bamboo material; the clamping pressure of the upper clamping hoop 36 and the lower clamping hoop 37 on the bamboo 6 can be flexibly adjusted in the process that the pushing device 4 pushes the bamboo 6 to open the fiber, so that the bamboo can stably move in the clamping hoops. The pressure controller 311 is further connected to the control device 5, and transmits a pressure signal to the control device 5, so that the control device 5 calculates by combining a position signal of the position sensor 32, and more effectively controls a motor (not shown) to drive the hydraulic system to control the operation of the propulsion block 41, so that the whole bamboo is subjected to fiber opening treatment stably and efficiently.

In the specific use process, firstly, the whole bamboo 6 after softening and removing is selected and placed in the whole bamboo fiber opening machine, the conical part 212 of the conical die 21 of the fiber opening device 2 butts against one end of the whole bamboo 6, the pushing block 41 of the pushing device 4 butts against the other end of the whole bamboo 6, each positioning and clamping device 3 clamps the middle of the whole bamboo, the position of each positioning and clamping device 3 on the track 11 of the frame 1 is adjusted according to the diameter of the bamboo 6 and the degree of the density of bamboo joints, then the corresponding button of the control device 5 controls the locking state of the locking piece 33, and the positioning and clamping devices 3 are locked on the frame 1 through the locking piece 33, so that each positioning and clamping device 3 is fixed on the frame 1; the actual distance values with the pushing blocks 41 of the pushing device 4 are detected and recorded by the position sensors 32 of the identification sensor 44; setting a default distance value between the position sensor 32 and the propulsion device 4; a pressure default value of the pressure controller 311 is set. Then, the control device 5 of the whole bamboo fiber opener of the present invention controls a motor (not shown) to drive a hydraulic pump, so that oil in an oil tank 43 flows to a first hydraulic cylinder 42, and thus the first hydraulic cylinder 42 is continuously extended, a pushing block 41 is continuously advanced, and thus the whole bamboo 6 is pushed to be extruded toward a cone 212, the bamboo 6 starts to be cracked under extrusion of the cone 212, and is curled and split in layers, during which the whole bamboo 6 slides in the positioning and clamping device 3, the pressure sensor 310 of each positioning and clamping device 3 detects the clamping pressure of the upper clamping hoop 36 and the lower clamping hoop 37 on the bamboo 6, and transmits a pressure signal to a pressure controller 311, and the expansion and contraction of a second hydraulic cylinder 39 are controlled according to a comparison result with a preset pressure default value, so that the clamping pressure of the upper clamping hoop 36 and the lower clamping hoop 37 on the whole bamboo is adjusted, and the whole bamboo 6 can slide in the positioning and clamping device 3 smoothly. During the advancing process of the pushing block 41, the distance between the pushing block 41 and each position sensor 32 is continuously reduced, when each corresponding default distance value is reached, the position sensor 32 of each positioning and clamping device 3 from the near to the far with the pushing block 41 sequentially controls the locking piece 33 to be released, and the released positioning and clamping device 3 moves towards the conical die 21 together with the whole bamboo wood. After the whole bamboo 6 is opened, each positioning and clamping device 3 returns to the correction position, the distance information recorded by the position sensor 32 is cleared, the oil of the first hydraulic oil cylinder 42 returns to the oil tank 43, and the pushing block 41 returns. Repeating the steps, and continuously opening the fiber. The whole bamboo fiber opening machine integrates intellectualization, informatization and mechanization, is simple, convenient and quick to operate, has high utilization rate of bamboo 6, and has the advantages of regular and definite length of the produced bamboo fiber, small strength damage, high quality and controllable length of the processed and produced bamboo fiber.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that the specific embodiments described are illustrative only and not intended to limit the scope of the invention, and that equivalent modifications and variations of the invention in light of the spirit of the invention will be covered by the claims of the present invention.

Claims (3)

1. The utility model provides a whole bamboo open fine machine which characterized in that: the device comprises a frame, a fiber opening device, a positioning and clamping device and a pushing device, wherein the fiber opening device is fixedly connected to the head end of the frame, the pushing device is connected to the frame in a sliding manner, the pushing device slides between the head end and the tail end of the frame, the positioning and clamping device is positioned between the fiber opening device and the pushing device, and the positioning and clamping device is connected to the frame in a sliding manner;

the propelling device comprises a propelling block, a first hydraulic oil cylinder and an oil tank, wherein one end of the first hydraulic oil cylinder is connected with the propelling block, the other end of the first hydraulic oil cylinder is connected with the oil tank, and the propelling block is connected with the frame in a sliding manner;

the positioning and clamping devices are provided with a plurality of tracks with concave grooves, and the positioning and clamping devices are connected to the tracks in a sliding manner;

the positioning and clamping device comprises a support, a position sensor and a locking piece, wherein the support is connected to the rack in a sliding manner through the locking piece, the position sensor is connected with the locking piece in a control manner, and the position sensor can detect the distance between the position sensor and the propelling device;

the positioning and clamping device further comprises a clamp which can sleeve the bamboo wood, and the clamp is fixedly connected to the support;

when the actual distance value between the pushing block and the position sensor is equal to the default distance value, the position sensor controls the locking piece to be loosened, and the positioning and clamping device can move forwards along the track of the rack and the bamboo wood;

the positioning and clamping device further comprises a bolt, a supporting block and a spring, wherein the clamping hoop is divided into an upper clamping hoop and a lower clamping hoop, the upper clamping hoop and the lower clamping hoop are respectively and slidably connected with the bolt, the lower clamping hoop is fixedly connected with the support, the spring is sleeved on the bolt and is positioned between the upper clamping hoop and the lower clamping hoop, and the bolt is fixedly connected with the supporting block;

the positioning and clamping device further comprises a second hydraulic oil cylinder, one end of the second hydraulic oil cylinder is fixedly connected with the lower clamp, and the other end of the second hydraulic oil cylinder is fixedly connected with the supporting block;

the positioning and clamping device further comprises a plurality of pressure sensors and a pressure controller, the pressure sensors are fixedly connected to the inner surfaces of the upper clamping hoop and the lower clamping hoop, the pressure sensors can detect clamping pressure of the upper clamping hoop and the lower clamping hoop on bamboo materials, the pressure controller is connected with the pressure sensors, and the pressure controller is connected with the second hydraulic oil cylinder in a control mode;

the fiber opening device comprises a conical die, wherein the conical die comprises a connecting part and a conical part, and the conical part is fixedly connected with the head end of the frame through the connecting part.

2. A whole bamboo fiber opening method is characterized in that: the method uses the whole bamboo fiber opening machine as claimed in claim 1, and comprises the following steps:

s10, the fiber opening device is propped against one end of the whole bamboo material, the propelling device is propped against the other end of the whole bamboo material, and the positioning and clamping device clamps the middle of the whole bamboo material;

s20, adjusting the positions of the positioning and clamping devices on the tracks of the rack according to the diameters of the bamboo materials and the density degree of bamboo joints;

s21, locking the positioning and clamping device on the rack through a locking piece;

s22, setting a default distance value between the position sensor and the propulsion device; s30, pushing the bamboo material by the pushing device;

s31, detecting and recording actual distance values between the position sensors and the propulsion device; when the actual distance value between the pushing device and the position sensor is equal to the default distance value, the locking piece is released, and the positioning and clamping device can move forwards along the track of the rack and the bamboo material.

3. A whole bamboo splitting method as claimed in claim 2, characterized in that: the positioning and clamping device further comprises a pressure controller, a pressure sensor and a second hydraulic cylinder, wherein the positioning and clamping device further comprises a step S23 after the step S22 and a step S32 after the step S31:

s23, setting a pressure default value of the pressure controller;

s32, when the clamping pressure value detected by the pressure sensor is smaller than the pressure default value, the clamping pressure is indicated to be too small, and at the moment, the pressure controller controls the second hydraulic cylinder to extend so as to further clamp the bamboo wood; and when the clamping pressure value detected by the pressure sensor is larger than the pressure default value, the clamping pressure is indicated to be too large, and the pressure controller controls the second hydraulic cylinder to shrink so as to reduce the clamping pressure on the bamboo wood.