A bamboo surface processing device

Abstract

This invention relates to the field of shot blasting machines and discloses a bamboo surface processing device, including a shot blasting machine and a conveyor frame. The conveyor frame is located at the feed inlet of the shot blasting machine and includes a support base and an adjusting base. The support base includes an adjusting groove located at the top of the support base, and the adjusting base is movably installed within the adjusting groove. A first elastic element has one end installed on the bottom wall of the adjusting groove and the other end connected to the bottom of the adjusting base. In this invention, the adjusting base is driven downward by the weight of the bamboo itself. The vertical displacement is converted into a V-shaped roller rotation angle using a spiral chute. Larger diameter bamboo triggers a larger displacement, and the angle automatically decreases to avoid excessively slow rotation speed. Smaller diameter bamboo has a smaller displacement, and the angle remains relatively large, ensuring sufficient rotation speed. This achieves dynamic adaptation from a mechanical structure perspective, where the larger the bamboo tube diameter, the smaller the angle.

Description

Technical Field

[0001] This invention relates to the field of shot blasting machines, and more particularly to a bamboo surface processing device. Background Technology

[0002] Shot blasting machines use high-speed shot to impact the surface of objects. They can be used for dewaxing, dehairing, roughening, or texturing of bamboo surfaces. V-roller conveying mechanisms are commonly used to achieve the composite motion of the bamboo. The bamboo is radially positioned by the grooves of the V-rollers, and the rotational motion of the rollers is decomposed into a tangential component that drives the bamboo's rotation and an axial component that propels it axially.

[0003] A search revealed that Chinese utility model patent with publication number CN216422220U discloses a shot blasting rust removal machine, which includes a V-shaped idler roller conveyor. A shot blasting machine and a cleaning chamber are arranged sequentially in the conveying direction of the V-shaped idler roller conveyor, and the shot blasting machine and the cleaning chamber respectively surround a portion of the idler roller.

[0004] In this design, the bamboo rotates synchronously during linear conveying, creating a spiral trajectory at any point on its surface. This ensures that the shot blasting unit can perform full-coverage impact treatment on the outer surface of the bamboo, effectively removing oxide scale, improving surface roughness, and increasing the depth of the compressive stress layer. This type of equipment has become a standardized pretreatment device in industries such as oil and gas pipelines and building structural pipes.

[0005] Existing shot blasting machines exhibit significant defects when continuously processing bamboo of various specifications. The machine cannot adjust the tilt angle of the V-roller in real time and dynamically according to the bamboo of different diameters. Since the tilt angle of the V-roller is fixed, the surface linear velocity of bamboo of different diameters is the same. However, because the surface area is proportional to the diameter, the amount of shot received per unit area is reduced for larger bamboo, resulting in a decrease in coverage. The shot blasting coverage of bamboo is severely uneven. For large-diameter bamboo, the excessively high linear velocity leads to insufficient contact time between the shot and the smaller bamboo, resulting in a decrease in coverage. For small-diameter bamboo, the excessively low linear velocity causes local over-blasting. Summary of the Invention

[0006] To address the aforementioned problem that shot blasting machines cannot dynamically adjust the tilt angle of the V-shaped rollers in real time according to bamboo of different diameters, the present invention achieves this through the following technical solution.

[0007] A bamboo surface processing device includes a shot blasting machine and a conveyor frame, wherein the conveyor frame is disposed at the feed inlet of the shot blasting machine and includes a support base and an adjustment base;

[0008] The support base includes:

[0009] An adjustment groove is provided on the top of the support base, and the adjustment base is movably installed in the adjustment groove;

[0010] The first elastic element has one end installed on the bottom wall of the adjusting groove and the other end connected to the bottom of the adjusting seat;

[0011] The connecting block is installed on the inner wall of the adjusting groove;

[0012] The adjusting seat includes:

[0013] V-shaped rollers are mounted on the adjusting seat;

[0014] A sliding groove is formed on the surface of the adjusting seat. The sliding groove is spiral-shaped, and the connecting block is nested inside the sliding groove.

[0015] When bamboo is placed on the V-shaped roller, the weight of the bamboo drives the adjusting seat to move downwards. The connecting block forces the adjusting seat to rotate along the slide track, so that the angle between the axis of the V-shaped roller and the axis of the bamboo decreases as the diameter of the bamboo increases.

[0016] Preferably, the V-shaped roller comprises:

[0017] The testing sleeve is fitted onto the outer circumference of the V-shaped roller and comes into direct contact with the bamboo.

[0018] Grooves are formed on the surface of the V-shaped roller;

[0019] The sliding seat is embedded in the groove and connected to the inner ring of the detection sleeve;

[0020] The second elastic element has one end fixed to the side wall of the groove and the other end connected to the sliding seat;

[0021] A displacement sensor is installed on the other side wall of the groove, and the detection end of the displacement sensor is connected to the sliding seat;

[0022] When the surface roughness of the bamboo increases, the friction between the detection sleeve and the bamboo increases. In the initial stage of the V-shaped roller rotation, the sliding seat is driven to compress the second elastic element to generate displacement. The displacement sensor detects the displacement in real time until the elastic force balances the friction force, after which the detection sleeve rotates synchronously with the V-shaped roller.

[0023] Preferably, the shot blasting machine is equipped with a programmable logic controller (PLC), and a displacement sensor is connected to the PLC. The PLC adjusts the shot flow rate of the shot blaster according to the displacement of the sliding seat.

[0024] Preferably, the support base further includes:

[0025] An adjusting plate is installed in the adjusting groove, and the first elastic element is installed on the adjusting plate;

[0026] The adjusting plate is configured to move along the inner wall of the adjusting groove to adjust the initial compression of the first elastic element.

[0027] Preferably, the support base further includes:

[0028] Through holes are formed on the surface of the support base;

[0029] A movable block is installed in the through hole, and the movable block is connected to the adjusting plate;

[0030] A lead screw passes through the moving block and is threadedly connected to the moving block. One end of the lead screw is connected to the bottom wall of the through hole, and the other end of the lead screw is equipped with a rotating wheel, which is mounted on a support base.

[0031] Preferably, the adjusting plate and the adjusting seat are provided with mounting grooves on the side that are close to each other, and the two ends of the first elastic member are respectively installed in the two mounting grooves.

[0032] Preferably, the adjustment seat further includes:

[0033] Two protrusions are installed on the top of the adjusting seat, and a V-shaped roller is installed between the two protrusions.

[0034] Preferably, the adjustment seat further includes:

[0035] The power source is mounted on the protrusion, and the power shaft of the power source is connected to the V-shaped roller.

[0036] Preferably, the support base further includes:

[0037] A distance sensor is installed in the adjustment groove. The detection end of the distance sensor is connected to the bottom of the adjustment seat. The distance sensor is connected to a programmable logic controller (PLC). The PLC adjusts the rotation speed of the V-roller according to the distance of the adjustment seat.

[0038] Preferably, the number of conveyor racks is at least two.

[0039] This invention provides a bamboo surface processing device. Compared with the prior art, it has the following advantages: the adjustment seat is driven to move downward by the weight of the bamboo itself, and the vertical displacement is converted into the rotation angle of the V-shaped roller by the spiral groove. Large-diameter bamboo triggers a larger displacement, and the angle automatically decreases to avoid the rotation speed being too slow; small-diameter bamboo has a small displacement, and the angle remains at a large value to ensure sufficient rotation speed. From the mechanical structure, it achieves dynamic adaptation of the larger the pipe diameter and the smaller the angle. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the three-dimensional structure proposed in this invention.

[0041] Figure 2 This is a schematic diagram of the three-dimensional structure proposed in this invention from another perspective.

[0042] Figure 3 This is a schematic diagram of the conveyor frame structure proposed in this invention.

[0043] Figure 4 This is a schematic diagram of the cross-section of the support base proposed in this invention.

[0044] Figure 5 This is a schematic diagram of the support base, adjusting plate, first elastic element, and adjusting base structure proposed in this invention.

[0045] Figure 6 This is a schematic diagram of the adjusting seat and V-shaped roller structure proposed in this invention.

[0046] Figure 7 This is a schematic diagram of the cross-section of the detection sleeve proposed in this invention.

[0047] Figure 8 This is a schematic diagram of the V-shaped roller, sliding seat, second elastic element, and displacement sensor structure proposed in this invention.

[0048] The attached figures are labeled as follows:

[0049] 100. Shot blasting machine;

[0050] 200. Conveyor frame;

[0051] 300, Support base; 301, Connecting block; 302, Adjusting plate; 303, First elastic element; 304, Through hole; 305, Moving block; 306, Lead screw; 307, Rotating wheel; 308, Distance sensor;

[0052] 400. Adjustment seat; 401. Power source; 402. Slide groove; 403. Protrusion;

[0053] 500, V-shaped roller; 501, detection sleeve; 502, sliding seat; 503, groove; 504, second elastic element; 505, displacement sensor. Detailed Implementation

[0054] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0055] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0056] Reference Figures 1-8A bamboo surface processing device includes a shot blasting machine 100 and a conveyor frame 200. The number of conveyor frames 200 is at least two, and each conveyor frame 200 is located at the feed inlet of the shot blasting machine 100. Each conveyor frame 200 includes a support base 300 and an adjusting base 400. The support base 300 includes an adjusting groove formed at the top of the support base 300, and the adjusting base 400 is movably installed within the adjusting groove. A first elastic member 303 has one end installed on the bottom wall of the adjusting groove and the other end connected to the bottom of the adjusting base 400. A connecting element is also included. Block 301 is installed on the inner wall of the adjusting groove; wherein, the adjusting seat 400 includes: a V-shaped roller 500, installed on the adjusting seat 400; a sliding groove 402 is opened on the surface of the adjusting seat 400, the sliding groove 402 is spiral, and the connecting block 301 is nested in the sliding groove 402; when the bamboo is placed on the V-shaped roller 500, the weight of the bamboo drives the adjusting seat 400 to move downward, and the connecting block 301 forces the adjusting seat 400 to rotate along the trajectory of the sliding groove 402, so that the angle between the axis of the V-shaped roller 500 and the axis of the bamboo decreases as the diameter of the bamboo increases.

[0057] This invention utilizes the weight difference of bamboo itself to achieve adaptive adjustment of the tilt angle of the V-shaped roller 500 through pure mechanical gravity drive. This allows bamboo of different diameters to obtain the optimal rotation speed and conveying trajectory during shot blasting, solving the core pain point of the traditional shot blasting machine 100's fixed angle being unable to adapt to bamboo of various specifications. Within the same processing time period, bamboo of different diameters can be continuously conveyed and processed. It also solves the problem that the existing shot blasting machine 100 needs to calculate and adjust the placement angle of the V-shaped roller 500 before shot blasting bamboo of different diameters each time.

[0058] The weight difference of bamboo with different diameters is mainly determined by its volume (cross-sectional area × length), and the volume increases quadratically with the diameter. Assuming the bamboo is 10 meters long and the wall thickness is 5 mm, the weight difference is entirely determined by the change in diameter.

[0059] If the diameter of the bamboo is 50mm, its weight is approximately 5.3kg;

[0060] If the diameter of a bamboo is 100mm, its weight is approximately 11.2kg;

[0061] It can be seen that bamboo of different diameters has a significant weight difference. Taking advantage of this characteristic, the adjusting seat 400, supported by the first elastic element 303, can automatically adjust the tilt angle of the V-shaped roller 500.

[0062] Weight difference drives angle change:

[0063] Large-diameter bamboo is heavy, and after being placed, it puts a lot of pressure on the adjusting seat 400. There are more compression springs (first elastic element 303), and the adjusting seat 400 moves down a long distance. The spiral groove 402 forces the V-shaped roller 500 to rotate, and the tilt angle automatically decreases, avoiding the slow rotation speed (insufficient linear speed) caused by the heavy weight.

[0064] Small-diameter bamboo is lightweight, resulting in less pressure and less spring compression. The adjustment seat 400 moves down a short distance, and the V-roller 500 maintains a large initial tilt angle to ensure sufficient rotation speed (avoiding slow rotation speed and insufficient shot blasting due to light weight).

[0065] No external power required for adjustment:

[0066] Abandoning the traditional electronic control system, it directly uses the gravity of the bamboo as the power source. Through the mechanical linkage of gravity → displacement → rotation, the V-shaped roller 500 tilt angle is automatically adjusted linearly with the diameter, without the need for manual intervention or sensor detection, thus reducing equipment complexity and maintenance costs.

[0067] Ensure uniformity of shot blasting trajectory: make the pitch of the spiral motion trajectory formed on the surface of bamboo of different diameters consistent, and ensure uniform shot impact density. This avoids large-diameter bamboo from being missed due to too small an angle and small-diameter bamboo from being over-blasted due to too large an angle, thereby improving the stability of shot blasting quality from the source.

[0068] The adjustment seat 400 is moved by the weight difference, and the vertical displacement is converted into a rotation angle by the spiral groove 402, so as to realize the self-feedback adjustment of the mechanical structure.

[0069] Utilizing the screw drive principle (screw rotation → linear motion), a trajectory of linear displacement to screw rotation groove 402 is designed so that when the adjusting seat 400 moves down, the connecting block 301 slides along the screw groove, forcing the V-roller 500 to rotate.

[0070] To address the issues of light weight of small-diameter bamboo and the tendency for insufficient pressure in traditional solutions to result in a small angle (slow rotation), a larger initial tilt angle was deliberately designed to ensure that even after the lightest bamboo is placed, the spring compression is small enough, and the V-roller 500 maintains a reasonable angle, preventing it from not rotating.

[0071] Initial angle advantage: Small-diameter bamboo is lightweight and will not excessively compress the spring, so the V-roller 500 maintains a large angle and the rotation speed meets the standard; large-diameter bamboo is heavy, so the angle automatically decreases and the rotation speed drops to a reasonable range.

[0072] Reference Figure 7 and Figure 8The V-shaped roller 500 includes: a detection sleeve 501, which is sleeved on the outer circumferential surface of the V-shaped roller 500 and directly contacts the bamboo; a groove 503, which is formed on the surface of the V-shaped roller 500; a sliding seat 502, which is embedded in the groove 503 and connected to the inner ring of the detection sleeve 501; a second elastic member 504, one end of which is fixed to the side wall of the groove 503 and the other end of which is connected to the sliding seat 502; and a displacement sensor 505, which is installed on the other side wall of the groove 503 and whose detection end is connected to the sliding seat 502.

[0073] When the surface roughness of the bamboo increases, the friction between the detection sleeve 501 and the bamboo increases. In the initial stage of the rotation of the V-roller 500, the sliding seat 502 is driven to compress the second elastic element 504 to generate displacement. The displacement sensor 505 detects the displacement in real time until the elastic force balances the friction force, after which the detection sleeve 501 rotates synchronously with the V-roller 500.

[0074] In this embodiment, the detection sleeve 501 is made of hardened stainless steel, such as 304 or 316 stainless steel, or engineering plastics, such as nylon, polytetrafluoroethylene or polyurethane; the second elastic element 504 is made of helical spring, butterfly spring or other elastic structure.

[0075] By detecting the roughness differences on the surface of different bamboo, the shot blasting machine 100 is provided with real-time feedback, enabling the equipment to intelligently identify the surface condition of the bamboo and automatically adjust the shot blasting parameters. It can also solve the problem of uneven quality caused by the one-cut processing of the traditional shot blasting machine 100.

[0076] Specifically, it uses the difference in friction to detect roughness:

[0077] Different types of bamboo have different surface roughness, resulting in different frictional forces when they come into contact with the detection sleeve 501. The detection sleeve 501 is designed to rotate relative to the surface of the V-shaped roller 500. When the bamboo is rough, the frictional force is large, and the detection sleeve 501 will temporarily stop rotating. When the V-shaped roller 500 continues to rotate, the internal sliding seat 502 will be squeezed and displaced. Conversely, when the bamboo is smooth, the frictional force is small, and the detection sleeve 501 quickly rotates with the V-shaped roller 500 with a small displacement. By observing the degree of lag in this relative rotation, the roughness of the bamboo surface can be directly reflected without the need for additional detection equipment.

[0078] To provide real-time data for the shot blasting process, the detection sleeve 501 converts roughness into an electrical signal through the displacement sensor 505, which is then transmitted to the control system of the shot blasting machine 100 in real time, realizing a closed loop of "detection-adjustment-processing" so that each bamboo can obtain the most suitable shot blasting force and angle.

[0079] Without the need for manual touching or sampling, the surface roughness of bamboo can be determined by the degree of jamming (displacement) of the detection sleeve 501 the moment it is rotated after being placed on the V-shaped roller 500, with an error of less than 5%.

[0080] Rough surfaces: The system automatically increases the amount of shot blasting, allowing more shot to impact uneven surfaces and ensuring thorough removal of oxide scale;

[0081] Smooth surface: The system automatically reduces the amount of projectiles ejected and adjusts the angle to avoid excessive blasting that could damage the substrate.

[0082] The shot blasting machine 100 is equipped with a programmable logic controller (PLC). The displacement sensor 505 is connected to the PLC, and the PLC adjusts the shot flow rate of the shot blaster according to the displacement of the sliding seat 502.

[0083] Reference Figure 4 The support base 300 also includes a distance sensor 308, which is installed in the adjustment groove. The detection end of the distance sensor 308 is connected to the bottom of the adjustment base 400. The distance sensor 308 is connected to a programmable logic controller (PLC). The PLC adjusts the rotation speed of the V-roller 500 according to the distance of the adjustment base 400.

[0084] The Programmable Logic Controller (PLC) is the brain of the entire system. Through a preset control program, it collects sensor data in real time and outputs precise control commands to achieve automated adjustment of the shot blasting machine. The specific working logic is as follows:

[0085] Signal acquisition: Receives signals from displacement sensor 505 (reflecting bamboo surface roughness / friction) and distance sensor 308 (reflecting bamboo diameter / weight), converting physical quantities into digital signals (such as 4-20mA current signals or pulse signals);

[0086] Data processing: Calculate target parameters based on sensor data, deduce surface roughness Ra from displacement, and determine the optimal shot flow rate; adjust the target rotation speed by adjusting the downward distance of the adjusting seat 400.

[0087] Command output: Send a pulse signal to power source 401 to adjust the speed of V-roller 500; send an opening command to the solenoid valve of shot blaster to dynamically adjust the shot flow rate.

[0088] The displacement sensor 505 is installed in the groove 503 of the V-roller 500 to detect the displacement of the sliding seat 502 caused by the friction of the bamboo. Essentially, it converts the surface roughness → friction → displacement into an electrical signal. The displacement sensor 505 is a magnetostrictive displacement sensor 505 or a conductive plastic potentiometer.

[0089] Detection logic:

[0090] The rough surface of bamboo leads to high friction, which in turn compresses the second elastic element 504 due to the sliding seat 502, resulting in a large displacement x.

[0091] The smooth surface of bamboo results in low friction, leading to a small displacement of the sliding seat 502.

[0092] The output signal V = k·x (k is the sensor sensitivity), and the PLC adjusts the shot flow rate according to the V value (more shot is supplied to rough bamboo and less shot is supplied to smooth bamboo).

[0093] Real-time roughness sensing: Surface condition assessment is completed simultaneously during bamboo transportation without the need for offline detection.

[0094] The distance sensor 308 is installed at the bottom of the adjustment slot. It uses a laser distance sensor 308 (accuracy ±0.5mm) or a contact displacement sensor 505 (such as an LVDT linear differential transformer) to detect the downward movement distance h of the adjustment seat 400, which indirectly reflects the diameter D of the bamboo (the larger the diameter, the greater the weight, the greater the spring compression, and the larger h).

[0095] Diameter adaptive adjustment: The weight of the bamboo is acquired in real time, and the PLC adjusts the speed of the V-roller by 500 n according to D to ensure a constant rotational linear speed and avoid the rotation speed of large-diameter bamboo being too slow or small-diameter bamboo being too fast.

[0096] When bamboo of different diameters is placed on the V-shaped roller 500, the weight of the bamboo will force the adjusting seat 400 to move downwards;

[0097] Small-diameter bamboo is lightweight, and the adjustment seat has a small downward movement distance of 400.

[0098] Large-diameter bamboo is heavy, and the adjustment seat has a large downward movement distance of 400.

[0099] The distance sensor 308 detects the change in distance (i.e., downward movement distance) between the adjusting seat 400 and the support seat 300 in real time, and converts this physical displacement into an electrical signal (such as voltage or current change) and transmits it to the PLC.

[0100] After receiving the signal from the ranging sensor 308, the PLC will perform two steps of processing:

[0101] Diameter information analysis: Based on the preset "displacement-diameter" correspondence, the electrical signal is converted into the actual diameter value of the bamboo;

[0102] Control logic is invoked: Based on the process rule that "the larger the diameter, the slower the V-roller speed should be" (to avoid uneven shot blasting or jumping caused by high-speed rotation of large-diameter bamboo), the PLC retrieves the corresponding speed parameters from the internal program.

[0103] The PLC converts the calculated speed parameters into pulse signals or analog signals and sends them to the power source 401 (stepper motor or servo motor).

[0104] Stepper motor: The speed is controlled by the pulse frequency (the higher the frequency, the faster the speed). The PLC outputs a pulse sequence of the corresponding frequency, and the motor rotates strictly according to the instructions.

[0105] Servo motors: The speed is controlled by analog voltage / current signals or digital communication commands. The motor can not only respond quickly, but also provide real-time feedback on whether the speed meets the target.

[0106] Execution effect: After receiving the instruction, the power source 401 immediately adjusts the speed of the V-roller 500 to make the bamboo rotate at the optimal speed matching its diameter. The slow rotation of large-diameter bamboo ensures uniform shot blasting coverage, while the fast rotation of small-diameter bamboo avoids insufficient shot blasting time.

[0107] During the shot blasting process, if the diameter of the bamboo fluctuates due to the error of the incoming material, the ranging sensor 308 will capture the new displacement change in real time and transmit the signal to the PLC again. The PLC will then recalculate the rotation speed and send an instruction to achieve dynamic fine adjustment, ensuring that the rotation speed always matches the current diameter of the bamboo.

[0108] Reference Figure 4 The adjusting seat 400 also includes: two protrusions 403 installed on the top of the adjusting seat 400, and a V-roller 500 installed between the two protrusions 403; a power source 401 installed on the protrusions 403, the power shaft of the power source 401 being connected to the V-roller 500, the power source 401 being a stepper motor or a servo motor, and the power source 401 being connected to a programmable controller.

[0109] Reference Figure 4 and Figure 5 The support base 300 further includes: an adjusting plate 302 installed in an adjusting groove, and a first elastic element 303 installed on the adjusting plate 302; the adjusting plate 302 is configured to move along the inner wall of the adjusting groove to adjust the initial compression of the first elastic element 303; a through hole 304 formed on the surface of the support base 300; a moving block 305 installed in the through hole 304, and the moving block 305 is connected to the adjusting plate 302; a lead screw 306 passing through the moving block 305 and threadedly connected to the moving block 305, one end of the lead screw 306 being connected to the bottom wall of the through hole 304, and the other end of the lead screw 306 being equipped with a rotating wheel 307, which is installed on the support base 300.

[0110] In this embodiment, the adjustment plate 302 is moved manually or electrically to compress the first elastic element 303. The first elastic element 303 adopts a helical spring, a butterfly spring, or other elastic structure. The manual adjustment method is to rotate the handwheel, which drives the lead screw 306 to rotate. The lead screw 306 drives the moving block 305 to move up and down in the through hole 304, and the moving block 305 drives the adjustment plate 302 to move. The electric adjustment method is to install a motor on the support base 300, and the motor drives the adjustment plate 302 to move directly.

[0111] Its core purpose is to allow the tilt angle of the V-roller 500 to be flexibly adjusted when shot blasting bamboo of different diameters (weights). By continuously adjusting the preload of the first elastic element 303, the rotation speed of the bamboo can be made to reach the ideal value, thus solving the problem of uneven shot blasting.

[0112] Specifically:

[0113] To address the shortcomings of fixed angles: In traditional shot blasting machines, the V-roller 500 has a fixed tilt angle. Due to the weight of large-diameter bamboo, the V-roller 500 may press too low or rotate too slowly after placement. Conversely, small-diameter bamboo may not be pressed enough or rotate too fast, resulting in a rotation speed that does not meet the shot blasting requirements (too fast will result in insufficient contact time between the shot and the ball, while too slow will lead to local over-blasting).

[0114] The angle can be adjusted by preload: The adjusting plate 302 can manually or automatically compress the spring to change the initial tension (preload) of the spring. When bamboo of different diameters is placed, the compression of the spring will change with the weight of the bamboo, which will drive the adjusting seat 400 to rotate, so that the tilt angle of the V-shaped roller 500 can automatically adapt to the diameter of the current bamboo, making the rotation speed more reasonable.

[0115] Achieve on-demand adjustment: If the shot blasting effect of bamboo of a certain diameter is not good (e.g., the rotation speed is not fast enough or too fast), the compression degree of the spring can be adjusted by adjusting plate 302. Repeated tests are conducted until a suitable tilt angle is found, just as simple and direct as adjusting the tightness of a screw.

[0116] More precise rotation speed:

[0117] Large-diameter bamboo: By adjusting the spring compression plate 302, the preload of the spring is increased. After the bamboo is placed, the spring compression decreases. The tilt angle of the V-shaped roller 500 will not decrease excessively due to the large weight, the rotation speed will not be too slow, and the contact time of the projectile is sufficient.

[0118] For small-diameter bamboo: appropriately loosen the spring preload so that the spring compression increases after the bamboo is placed. Increase the V-shaped roller's 500° tilt angle appropriately so that the rotation speed is not too fast and avoids local over-throwing.

[0119] Final result: The rotation speed of bamboo of different diameters can be close to the ideal value, ensuring that every point on the surface is evenly impacted by the projectile.

[0120] Shot blasting quality is significantly improved:

[0121] Uniform coverage: Large-diameter bamboo will not be missed due to slow rotation speed, and small-diameter bamboo will not be over-sprayed due to fast rotation speed. Surface oxide scale is removed more thoroughly, and roughness and compressive stress layer depth meet the standards.

[0122] Reduce scrap rate: Avoid surface defects in bamboo caused by uneven shot blasting, saving rework costs.

[0123] Reference Figure 4 and Figure 5 The adjusting plate 302 and the adjusting seat 400 are both provided with mounting grooves on their respective sides. The two ends of the first elastic member 303 are respectively installed in the two mounting grooves. The two ends of the first elastic member 303 are restricted in the mounting grooves. When the first elastic member 303 is compressed, the first elastic member 303 will not shift.

[0124] Bamboo surface processing device working process:

[0125] 1. Initial settings: Preload and parameter presets

[0126] Adjustment of the preload of the adjusting plate 302: By manually turning the handwheel or by electric drive, the adjusting plate 302 moves within the adjusting groove, compressing the first elastic element 303 (spring) to a suitable initial state. For example, before processing large-diameter bamboo, the spring preload is increased to prevent it from being over-compressed under the pressure of heavy objects; when processing small-diameter bamboo, the preload is reduced to ensure that the spring has enough compression space to trigger the angle adjustment.

[0127] PLC parameter setting: Input process parameters such as bamboo diameter range, surface roughness standard and target rotation linear speed into the programmable controller (PLC) to establish a correspondence table of "adjustment seat 400 displacement - bamboo diameter" and "sliding seat 502 displacement - surface roughness" to provide a basis for subsequent automatic adjustment.

[0128] 2. Bamboo feeding: Gravity-driven mechanical adjustment

[0129] Bamboo placement: The bamboo is conveyed to the conveyor frame 200 at the feed inlet of the shot blasting machine 100 and placed on the surface of the V-shaped roller 500. The weight of the bamboo acts on the adjusting seat 400, causing it to move downwards within the adjusting groove.

[0130] Angle adaptive adjustment:

[0131] Large diameter bamboo (heavy): Gravity causes the adjusting seat 400 to move down a large distance, the connecting block 301 slides along the spiral groove 402, forcing the adjusting seat 400 to rotate, and the angle between the axis of the V-roller 500 and the axis of the bamboo automatically decreases (e.g., from the initial 30° to 10°), avoiding insufficient shot blasting due to too slow rotation speed.

[0132] For small-diameter bamboo (lightweight): the adjusting seat 400 moves down a small distance, and the V-shaped roller 500 maintains a large initial angle (such as 25°) to ensure sufficient rotation speed and avoid insufficient shot blasting.

[0133] 3. Parameter detection: Real-time feedback from dual sensors

[0134] Distance sensor 308 detects diameter: The distance sensor 308 installed at the bottom of the adjustment slot measures the downward movement distance of the adjustment seat 400 in real time, indirectly calculates the diameter of the bamboo (a downward movement of 1mm corresponds to an increase of 50mm in diameter), and transmits the signal to the PLC.

[0135] The displacement sensor 505 detects surface roughness: When the V-roller 500 rotates, if the bamboo surface is rough, the friction between the detection sleeve 501 and the bamboo is large, causing the detection sleeve 501 to rotate with lag. The internal sliding seat 502 compresses the second elastic element 504, resulting in a large displacement. If the surface is smooth, the detection sleeve 501 rotates quickly and synchronously, with a small displacement. The displacement sensor 505 converts this displacement into an electrical signal (e.g., 4-20mA), reflecting the surface roughness (e.g., a displacement of 2mm corresponds to a roughness Ra of 8μm).

[0136] 4. Automatic adjustment: PLC dynamically matches process parameters

[0137] Calculate the target rotation speed: The PLC calculates the target rotation speed of the V-roller 500 based on the detected bamboo diameter using a formula (the larger the diameter, the lower the rotation speed), and sends a command to the power source 401 (stepper motor or servo motor) to adjust the rotation speed, ensuring that the linear velocity of the bamboo surface is constant (e.g., 50m / min).

[0138] Adjusting shot flow rate: The PLC automatically adjusts the shot blasting volume of the shot blaster based on the roughness signal (e.g., increase the flow rate by 20% for rough surfaces and decrease it by 10% for smooth surfaces). At the same time, the blasting angle can be finely adjusted to avoid over-blasting or incomplete cleaning.

[0139] 5. Shot blasting: Compound motion achieves uniform impact.

[0140] Bamboo composite motion: The V-shaped roller 500 rotates at an appropriate speed, and at the same time, the axial feed is generated due to the tilt angle, so that a uniform spiral motion trajectory is formed on the surface of the bamboo, ensuring that the bullet covers no dead corners.

[0141] Shot impact control: The shot blaster sprays shot at a real-time adjusted flow rate. The high-speed shot impacts the bamboo surface, removing oxide scale and creating a uniform roughness. Large-diameter bamboo rotates slowly to ensure sufficient shot contact, while small-diameter bamboo rotates quickly to avoid localized over-blasting.

[0142] 6. Dynamic correction: Real-time response to changes in incoming materials.

[0143] Diameter error correction: If there is a deviation between the actual bamboo diameter and the detected value (such as material error), the distance sensor 308 captures the displacement change of the adjustment seat 400 in real time, and the PLC recalculates and corrects the rotation speed to ensure accurate matching of processing parameters.

[0144] Roughness fluctuation adjustment: If the surface roughness of the bamboo is uneven (such as local rust), the displacement sensor 505 provides real-time feedback, and the PLC immediately fine-tunes the shot flow rate to achieve dynamic compensation and ensure consistent processing quality throughout the entire bamboo section.

[0145] In summary, compared with existing technologies, it has the following beneficial effects:

[0146] The adjustment seat 400 is driven to move downward by the weight of the bamboo itself. The vertical displacement is converted into the rotation angle of the V-shaped roller 500 by the spiral groove 402. Large-diameter bamboo triggers a larger displacement, and the angle automatically decreases to avoid the rotation speed being too slow. Small-diameter bamboo has a small displacement and the angle remains at a large value to ensure sufficient rotation speed. From the mechanical structure, dynamic adaptation is achieved where the larger the diameter of the bamboo tube, the smaller the angle.

[0147] This solution uses a dual mechanism of gravity-adjusted angle and PLC-controlled rotation speed to ensure a constant surface linear velocity for bamboo of different diameters. Large-diameter bamboo rotates slowly while small-diameter bamboo rotates quickly, ensuring that the impact frequency of the projectiles at any point on the surface of each bamboo is basically the same, thus significantly improving the uniformity of surface treatment.

[0148] This solution detects the difference in friction between the sleeve 501 and the bamboo when they come into contact, and uses the displacement sensor 505 to provide real-time feedback on roughness data. A rough surface triggers a larger displacement signal, and the system automatically increases the shot flow rate to enhance the cleaning effect. A smooth surface has a smaller displacement signal, and the system reduces shot spraying to avoid excessive blasting, thus achieving precise control of blasting more on rough surfaces and less on smooth surfaces.

[0149] Through a fully closed-loop system that combines gravity-driven mechanical adjustment, real-time sensor detection, and PLC automatic control, continuous and seamless production of bamboo of various specifications is achieved. After the bamboo is placed on the conveyor rack 200, the weight recognition, angle adjustment, speed matching, and shot flow rate adjustment are automatically completed.

[0150] Therefore, although the invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the scope of the foregoing disclosure, and it should be understood that in some cases, certain features of the invention may be adopted without departing from the scope and spirit of the invention and without corresponding use of other features. Thus, many modifications can be made to adapt a particular environment or material to the essential scope and spirit of the invention. The invention is not intended to be limited to the specific terminology used in the following claims and / or the specific embodiments disclosed as the best mode for carrying out the invention, but the invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Therefore, the scope of the invention will be defined only by the appended claims.

Claims

1. A bamboo surface processing apparatus, comprising a shot blasting machine (100) and a conveyor frame (200), wherein the conveyor frame (200) is disposed at the feed inlet of the shot blasting machine (100), characterized in that, The conveyor frame (200) includes a support base (300) and an adjustment base (400); The support base (300) includes: An adjustment groove is provided on the top of the support base (300), and the adjustment base (400) is movably installed in the adjustment groove; The first elastic element (303) is installed at one end on the bottom wall of the adjustment groove and at the other end connected to the bottom of the adjustment seat (400); The connecting block (301) is installed on the inner wall of the adjusting groove; The adjusting seat (400) includes: V-shaped roller (500) is mounted on adjusting seat (400); A slide groove (402) is formed on the surface of the adjusting seat (400). The slide groove (402) is spiral-shaped, and the connecting block (301) is nested inside the slide groove (402). When the bamboo is placed on the V-roller (500), the weight of the bamboo drives the adjusting seat (400) to move down. The connecting block (301) forces the adjusting seat (400) to rotate along the track of the slide groove (402), so that the angle between the axis of the V-roller (500) and the axis of the bamboo decreases as the diameter of the bamboo increases.

2. The bamboo surface processing device according to claim 1, characterized in that, The V-shaped roller (500) includes: The detection sleeve (501) is fitted onto the outer circumferential surface of the V-shaped roller (500) and comes into direct contact with the bamboo; A groove (503) is formed on the surface of the V-shaped roller (500); The sliding seat (502) is embedded in the groove (503) and connected to the inner ring of the detection sleeve (501); The second elastic element (504) is fixed at one end to the side wall of the groove (503) and connected at the other end to the sliding seat (502). The displacement sensor (505) is installed on the other side wall of the groove (503), and the detection end of the displacement sensor (505) is connected to the sliding seat (502).

3. The bamboo surface processing device according to claim 2, characterized in that, The shot blasting machine (100) is equipped with a programmable controller. The displacement sensor (505) is connected to the programmable controller. The programmable controller adjusts the shot flow rate of the shot blaster according to the displacement of the sliding seat (502).

4. The bamboo surface processing device according to claim 1, characterized in that, The support base (300) also includes: An adjusting plate (302) is installed in the adjusting groove, and a first elastic element (303) is installed on the adjusting plate (302); The adjusting plate (302) is configured to move along the inner wall of the adjusting groove to adjust the initial compression of the first elastic element (303).

5. The bamboo surface processing device according to claim 4, characterized in that, The support base (300) also includes: A through hole (304) is formed on the surface of the support base (300); A movable block (305) is installed in a through hole (304), and the movable block (305) is connected to an adjusting plate (302); A lead screw (306) passes through a movable block (305) and is threadedly connected to the movable block (305). One end of the lead screw (306) is connected to the bottom wall of the through hole (304), and the other end of the lead screw (306) is equipped with a rotating wheel (307). The rotating wheel (307) is mounted on the support base (300).

6. The bamboo surface processing device according to claim 4, characterized in that, The adjusting plate (302) and the adjusting seat (400) are respectively provided with mounting grooves on the side that are close to each other, and the two ends of the first elastic member (303) are respectively installed in the two mounting grooves.

7. The bamboo surface processing device according to claim 1, characterized in that, The adjusting seat (400) also includes: Two protrusions (403) are installed on the top of the adjusting seat (400), and a V-shaped roller (500) is installed between the two protrusions (403).

8. The bamboo surface processing device according to claim 7, characterized in that, The adjusting seat (400) also includes: A power source (401) is mounted on a protrusion (403), and the power shaft of the power source (401) is connected to a V-roller (500).

9. The bamboo surface processing device according to claim 3, characterized in that, The support base (300) also includes: A distance sensor (308) is installed in the adjustment groove. The detection end of the distance sensor (308) is connected to the bottom of the adjustment seat (400). The distance sensor (308) is connected to a programmable logic controller (PLC). The PLC adjusts the rotation speed of the V-roller (500) according to the distance of the adjustment seat (400).

10. The bamboo surface processing device according to claim 1, characterized in that, The number of the conveyor racks (200) is at least two.

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