Abrasive belt service life evaluation method and system for wood and bamboo mechanical grinding

Abstract

The invention belongs to the technical field of wood and bamboo abrasive belt grinding, and discloses an abrasive belt service life evaluation method and system for wood and bamboo mechanical grinding, an abrasive belt sample belt is controlled to grind a wood and bamboo workpiece according to specified grinding parameters, and at least one group of surface roughness parameters of the abrasive belt sample belt are obtained; and determining at least one grinding power slope based on the motor power of the driving roller at at least two acquisition moments and the idle power of the driving roller, so as to comprehensively evaluate the extended meter number of the abrasive belt sample belt under the specified grinding parameters by adopting double indexes of the grinding power and the abrasive belt surface roughness parameter. The method is suitable for judging the conditions of uniform abrasion and severe abrasion of the abrasive belt, the whole measurement process is simple and convenient, the accuracy of the service life evaluation result of the abrasive belt is guaranteed, waste caused by unreasonable abrasive belt model selection can be effectively avoided, powerful support is provided for grinding process optimization and cost control in actual production, and important significance is brought to industry development.

Description

Technical Field

[0001] The present application belongs to the technical field of abrasive belt grinding of wood and bamboo materials, and in particular relates to a method and system for assessing the life of an abrasive belt used for mechanical grinding of wood and bamboo materials. Background Art

[0002] In the production process of wood, bamboo and their products, mechanical surface sanding, mainly belt grinding, plays an important role. Generally speaking, rough grinding focuses on material removal efficiency, and fine grinding focuses on processing surface quality. When using the same abrasive belt to grind different types of workpiece materials, and when using multiple types of abrasive belts to grind the same type of workpiece materials, accurate assessment of the belt life is particularly important for the rational selection of abrasive belts. When mechanically grinding wood and bamboo materials, the abrasive belt generally has multiple stages of initial wear, stable wear and severe wear. As the numerous abrasive units on the surface of the abrasive belt wear, self-sharpening and passivation processes, its cutting ability gradually changes, and accordingly, the surface morphology and roughness structure of the workpiece under the comprehensive action of the abrasives will also be different.

[0003] For the coarse grinding of wood and bamboo materials with a certain thickness, the common basis for evaluating the life of the sanding belt is the grinding efficiency represented by the material removal rate. For example, a sanding belt service life detection device and method disclosed in application number CN109342316A analyzes the material removal rate change characteristics within a large cycle to obtain the extended number of meters when the sanding belt fails. For the semi-finishing and fine grinding of wood and bamboo materials, such as in the processing of ecological boards, the surface veneer needs to be quantitatively ground to present a certain surface roughness structure for subsequent finishing treatment. At this time, due to factors such as uneven distribution of defects on the surface of the veneer and thickness errors of the veneer itself, the local abrasive particles on the sanding belt are often severely worn, leaving abnormal wear marks on the surface of the board, which is very unfavorable for subsequent veneer processing, and even if the sanding belt is not used for a long time, it needs to be replaced.

[0004] At present, the basis for evaluating the life of abrasive belts, which focuses on the quality of grinding surface, is mainly based on manual experience to determine the grinding termination time of the abrasive belts. This not only fails to obtain accurate evaluation results of the life of the abrasive belts, but also easily leads to unreasonable abrasive belt selection, thereby causing unnecessary waste of materials and energy. Summary of the invention

[0005] The present application aims to solve the above-mentioned problem that the current assessment basis of the life of the abrasive belt, which focuses on the grinding surface quality, mainly relies on manual experience to judge the grinding termination time of the abrasive belt, which not only fails to obtain accurate assessment results of the life of the abrasive belt, but also easily leads to unreasonable abrasive belt selection, thereby causing unnecessary waste of materials and energy and other technical defects. A method for assessing the life of an abrasive belt for mechanical grinding of wood and bamboo materials is proposed. The method is applied to a wood and bamboo material grinding device. The wood and bamboo material grinding device includes a driving roller for driving the abrasive belt sample to rotate and a direct-acting cylinder for pressing the wood and bamboo workpiece. The method includes: Controlling the abrasive belt sample to grind the wood or bamboo workpiece according to the specified grinding parameters, and obtaining at least one set of surface roughness parameters of the abrasive belt sample; Determining at least one grinding power slope based on the motor power of the driving roller at at least two acquisition moments and the idling power of the driving roller; Based on all surface roughness parameters and all grinding power slopes, the extension of the abrasive belt sample in meters under specified grinding parameters is obtained.

[0006] In an optional solution of the first aspect, specifying the grinding parameters includes specifying the grinding belt speed and specifying the grinding pressure; According to the specified grinding parameters, the abrasive belt sample is controlled to grind the wood and bamboo workpiece, including: After the abrasive belt sample is installed on the driving roller, the rotation speed of the driving roller is controlled to be the specified abrasive belt rotation speed, and the direct-acting cylinder is controlled to press the wood or bamboo workpiece toward the abrasive belt sample, so that the pressure between the wood or bamboo workpiece and the abrasive belt sample is the specified grinding pressure.

[0007] In another optional solution of the first aspect, obtaining at least one set of surface roughness parameters of the abrasive belt sample comprises: Whenever the number of replacements of the wood or bamboo workpiece reaches a preset number threshold, the surface profile parameters of the abrasive belt sample are obtained; The arithmetic mean height and the average curvature of the front vertex are obtained according to each surface profile parameter, and each arithmetic mean height and the corresponding average curvature of the front vertex are used as a group of surface roughness parameters of the abrasive belt sample.

[0008] In another optional solution of the first aspect, at least one grinding power slope is determined based on the motor power of the driving roller at at least two acquisition moments and the idling power of the driving roller, including: Acquire the motor power of the driving roller at at least two acquisition moments, and calculate the difference between each motor power and the idling power of the driving roller to obtain the corresponding grinding power; Perform interpolation and smoothing processing on all acquisition moments and the grinding power corresponding to each acquisition moment, and obtain a smooth curve function according to the processing results; At least one grinding power slope is determined based on the smooth curve function.

[0009] In yet another optional solution of the first aspect, the smooth curve function includes at least three curve powers and a curve moment corresponding to each curve power; At least one grinding power slope is determined based on the smooth curve function, including: Based on the adjacent curve powers and adjacent curve moments of each curve power in the smooth curve function, the first-order curve power of the corresponding curve power is calculated; Based on the adjacent first-order curve powers and adjacent curve moments of each first-order curve power, the second-order curve power of the corresponding first-order curve power is calculated; All second order curve powers are considered to have at least one grinding power slope.

[0010] In another optional solution of the first aspect, according to all surface roughness parameters and all grinding power slopes, the extension meters of the abrasive belt sample under the specified grinding parameters are obtained, including: When any grinding power slope exceeds a preset slope threshold, the rotation linear speed of the abrasive belt sample is obtained according to the rotation speed and diameter of the driving roller; The product of the rotational linear speed and the curve time corresponding to the grinding power slope is calculated to obtain the extension meters of the abrasive belt sample under the specified grinding parameters; or When any set of surface roughness parameters is less than a preset roughness parameter threshold, the rotational linear speed of the abrasive belt sample is obtained according to the rotation speed and diameter of the driving roller; The grinding time of the abrasive belt sample is calculated based on the number of replacement times of the wood and bamboo workpieces corresponding to the surface roughness parameters and the grinding time of each wood and bamboo workpiece, and the product of the rotary linear speed and the grinding time of the abrasive belt sample is calculated to obtain the extension meters of the abrasive belt sample under the specified grinding parameters.

[0011] In yet another alternative of the first aspect, the method further comprises: When the thickness of the wood or bamboo workpiece is lower than a preset thickness threshold, the direct-acting cylinder is controlled to perform a reset action to replace the wood or bamboo workpiece; After the wood and bamboo workpiece is replaced, the abrasive belt sample is controlled according to the specified grinding parameters to grind the replaced wood and bamboo workpiece.

[0012] In a second aspect, an embodiment of the present application provides a belt life assessment system for mechanical grinding of wood and bamboo materials, the system is applied to a wood and bamboo material grinding device, the wood and bamboo material grinding device includes a driving roller for driving the abrasive belt sample belt to rotate and a direct-acting cylinder for pressing the wood and bamboo workpiece, the system includes: A parameter determination module is used to control the abrasive belt sample to grind the wood or bamboo workpiece according to the specified grinding parameters, and obtain at least one set of surface roughness parameters of the abrasive belt sample; A slope determination module, used to determine at least one grinding power slope based on the motor power of the driving roller at at least two acquisition moments and the idling power of the driving roller; The life evaluation module is used to obtain the extension meters of the abrasive belt sample under specified grinding parameters based on all surface roughness parameters and all grinding power slopes.

[0013] In a third aspect, the embodiments of the present application also provide a belt life assessment system for mechanical grinding of wood and bamboo materials, comprising a processor and a memory; The processor is connected to the memory; A memory for storing executable program codes; The processor runs a program corresponding to the executable program code by reading the executable program code stored in the memory, so as to implement the sanding belt life assessment method for mechanical grinding of wood and bamboo materials provided by the first aspect of the embodiment of the present application or any implementation method of the first aspect.

[0014] In a fourth aspect, an embodiment of the present application provides a computer storage medium, which stores a computer program. The computer program includes program instructions. When the program instructions are executed by a processor, the method for assessing the life of an abrasive belt for mechanical grinding of wood and bamboo materials provided by the first aspect of the embodiment of the present application or any one of the implementation methods of the first aspect can be implemented.

[0015] Beneficial effects of this application: When evaluating the life of an abrasive belt used for mechanical grinding of wood and bamboo materials, the abrasive belt sample is controlled according to specified grinding parameters to grind the wood and bamboo workpiece, and at least one set of surface roughness parameters of the abrasive belt sample is obtained, and at least one grinding power slope is determined based on the motor power of the driving roller at at least two acquisition moments and the idling power of the driving roller. Taking into account the complexity of measuring the grinding force, grinding temperature, and grinding surface roughness during the grinding of wood and bamboo materials and the special physical properties of wood and bamboo materials, the grinding power and the abrasive belt surface roughness parameters are used as dual indicators to comprehensively evaluate the extension meters of the abrasive belt sample under specified grinding parameters. This is not only suitable for determining the uniform wear and severe wear of the abrasive belt, but the overall measurement process is simple, ensuring the accuracy of the abrasive belt life assessment result, and can effectively avoid the waste caused by unreasonable abrasive belt selection, providing strong support for grinding process optimization and cost control in actual production, and is of great significance to the development of the industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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 application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 An overall flow chart of a method for evaluating the life of an abrasive belt for mechanical grinding of wood and bamboo provided in an embodiment of the present application; Figure 2 A schematic diagram of the structure of a wood and bamboo material grinding device provided in an embodiment of the present application; Figure 3 A schematic diagram showing a smooth curve function provided in an embodiment of the present application; Figure 4 A schematic diagram showing a first-order curve power and a second-order curve power provided in an embodiment of the present application; Figure 5 It is a profile morphology diagram of different grinding states of an abrasive belt when grinding a medium density fiberboard provided in an embodiment of the present application; Figure 6 A schematic diagram of the structure of a sanding belt life assessment system for mechanical grinding of wood and bamboo provided in an embodiment of the present application; Figure 7 A schematic structural diagram of another abrasive belt life assessment system for mechanical grinding of wood and bamboo materials provided in an embodiment of the present application. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0019] In the following introduction, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The following introduction provides multiple embodiments of the present application, and different embodiments can be replaced or combined, so the present application can also be considered to include all possible combinations of the same and / or different embodiments recorded. Therefore, if one embodiment includes features A, B, and C, and another embodiment includes features B and D, then the present application should also be considered to include embodiments containing one or more of all other possible combinations of A, B, C, and D, although the embodiment may not be clearly recorded in the following text.

[0020] The following description provides examples and does not limit the scope, applicability or examples set forth in the claims. Changes may be made to the functions and arrangements of the elements described without departing from the scope of the present application. Various processes or components may be appropriately omitted, substituted or added to each example. For example, the described method may be performed in an order different from the order described, and various steps may be added, omitted or combined. In addition, features described in some examples may be combined in other examples.

[0021] It should be emphasized that wood and bamboo, as natural biological porous materials, have relatively complex physical and chemical properties. Their density, texture, moisture content and hardness will affect the grinding process of the abrasive belt, thus causing changes in surface roughness. Conventional abrasive belt life assessment methods often ignore these material characteristics of wood and bamboo. For example, when evaluating the grinding surface quality, since wood and bamboo are natural biological porous materials, the commonly used contact and non-contact measurement methods are difficult to accurately distinguish between their biological unevenness and processing unevenness, which leads to large errors in the life assessment results of the abrasive belt; or when evaluating the grinding power, simply relying on the grinding power to assess the life of the abrasive belt may not be enough to reflect the details of the grinding process, such as the characteristics of the workpiece material, changes in the contact state between the abrasive belt and the workpiece, etc., which also leads to large errors in the life assessment results of the abrasive belt.

[0022] In addition, the surface roughness of the abrasive belt and the surface roughness of the wood or bamboo workpiece are not in a simple linear relationship, but are affected by many factors, such as the material properties of the workpiece, the degree of abrasive belt wear, and process parameters. The conventional abrasive belt life assessment methods mentioned above are based on linear assumptions and cannot accurately reflect the complex relationship between the surface roughness of the abrasive belt and the surface roughness of the workpiece. In addition, they rely too much on manual experience and lack precise quantitative standards for abrasive belt life assessment, which reduces operability and consistency in the production process.

[0023] Based on this, the present application will explain the method for assessing the life of an abrasive belt used for mechanical grinding of wood and bamboo materials in combination with one or more embodiments shown below to solve the above-mentioned technical defects.

[0024] See next Figure 1 , Figure 1 The overall flow chart of a method for assessing the life of an abrasive belt for mechanical grinding of wood and bamboo materials provided in an embodiment of the present application is shown.

[0025] like Figure 1 As shown, the method for assessing the life of an abrasive belt for mechanical grinding of wood and bamboo materials may at least comprise the following steps: Step 102: Control the abrasive belt sample to grind the wood or bamboo workpiece according to the specified grinding parameters, and obtain at least one set of surface roughness parameters of the abrasive belt sample.

[0026] In an embodiment of the present application, the method for assessing the life of an abrasive belt used for mechanical grinding of wood and bamboo materials can be, but is not limited to, applied to a control terminal, which can be connected to a wood and bamboo material grinding device to control an abrasive belt sample to grind the wood and bamboo material workpiece through the wood and bamboo material grinding device, and analyze the extension meters of the abrasive belt sample based on the various parameters obtained during the grinding process (that is, the grinding extension meters, which serves as a standard for assessing the life of the abrasive belt).

[0027] Among them, the wood and bamboo material grinding device can at least include a driving roller for driving the abrasive belt sample to rotate and a direct-acting cylinder for pressing the wood and bamboo material workpiece. The driving roller can realize the installation and fixation of the abrasive belt sample together with the tensioning roller, and drive the abrasive belt sample to rotate under the control of the driving motor to adjust the grinding speed of the abrasive belt sample; the direct-acting cylinder can control the bamboo wood workpiece to press in the direction toward the abrasive belt sample to adjust the grinding pressure between the bamboo wood workpiece and the abrasive belt sample. Here, the abrasive belt sample can prepare an abrasive belt with a specified width and circumference for wood and bamboo material grinding for the tester, which is pre-installed on the driving roller and the tensioning roller by the tester, and a backing plate can be provided on the back side of the grinding area of ​​the abrasive belt sample, and a rubber pad with a hardness set according to the particle size number of the abrasive belt sample is provided on the backing plate (generally speaking, the larger the particle size number, the smaller the hardness of the rubber pad), so as to ensure a more real and reliable grinding effect between the abrasive belt sample and the bamboo wood workpiece.

[0028] Of course, in addition to the above-mentioned drive roller, tensioning roller, drive motor and direct-acting cylinder structures, the wood and bamboo material grinding device may also include a support seat, a spring tensioning mechanism, a travel switch, a clamp and a linear guide rail and other structures to jointly ensure that the life assessment process of the abrasive belt sample can be carried out normally.

[0029] Also see here Figure 2 The structural schematic diagram of a wood and bamboo material grinding device provided in an embodiment of the present application is shown in FIG. Figure 2 As shown, the wood and bamboo material grinding device may include a support seat, a tensioning roller 1, a driving roller 2, a driving motor 3, a spring tensioning mechanism 4, an abrasive belt sample 5, a rubber backing plate 6, a wood and bamboo material workpiece 7, a direct-acting cylinder 8, a travel switch 9, a clamp 10 and a linear guide 11. The driving motor 3 can adjust the grinding speed of the abrasive belt sample 5 by adjusting the speed of the driving roller 2, the spring tensioning mechanism 4 can adjust the tension of the abrasive belt sample 5 by adjusting the position of the tensioning roller 1, the direct-acting cylinder 8 can adjust the grinding pressure between the abrasive belt sample 5 and the wood and bamboo material workpiece 7 by adjusting the pressing force applied to the wood and bamboo material workpiece 7, the travel switch 9 can be used to control the working state of the direct-acting cylinder 8, the clamp 10 can be used to clamp the wood and bamboo material workpiece 7, and the linear guide 11 can be used to guide the wood and bamboo material workpiece 7 to move toward the abrasive belt sample 5 or away from the abrasive belt sample 5.

[0030] It can be understood that the control terminal controls the abrasive belt sample to grind the wood and bamboo workpiece according to the specified grinding parameters, obtains at least one set of surface roughness parameters of the abrasive belt sample, and determines at least one grinding power slope based on the motor power of the drive roller at at least two acquisition moments and the idling power of the drive roller. Taking into account the complexity of measuring the grinding force, grinding temperature, and grinding surface roughness during the grinding of wood and bamboo materials and the special physical properties of wood and bamboo materials, the grinding power and the abrasive belt surface roughness parameters are used as dual indicators to comprehensively evaluate the extension meters of the abrasive belt sample under the specified grinding parameters. This is not only suitable for the determination of uniform wear and severe wear of the abrasive belt, but the overall measurement process is simple, which ensures the accuracy of the abrasive belt life assessment results, and can effectively avoid the waste caused by unreasonable abrasive belt selection, providing strong support for grinding process optimization and cost control in actual production, and is of great significance to the development of the industry.

[0031] Specifically, when evaluating the life of an abrasive belt used for mechanical grinding of wood and bamboo materials, the control terminal can, but is not limited to, after the tester installs the abrasive belt sample on the driving roller of the wood and bamboo material grinding device, adjusts the spring tensioning mechanism, and fixes the wood and bamboo workpiece by a clamp, issue control instructions to the drive motor and the direct-acting cylinder that control the rotation of the drive roller according to the specified grinding parameters, so as to control the abrasive belt sample to grind the wood and bamboo workpiece under the action of the drive motor and the direct-acting cylinder.

[0032] It can be understood that the specified grinding parameters can include but are not limited to specifying the sanding belt speed and the specified grinding pressure. The control terminal can adjust the speed of the driving roller through the driving motor so that the speed of the driving roller is consistent with the specified sanding belt speed (that is, to ensure that the sanding belt sample can rotate at the specified sanding belt speed), and can also apply a clamping force to the wood and bamboo workpiece through the direct-acting cylinder (that is, to control the wood and bamboo workpiece to move toward the sanding belt sample) so that the pressure between the wood and bamboo workpiece and the sanding belt sample is consistent with the specified grinding pressure.

[0033] Furthermore, after the sand belt sample is controlled to grind the wood and bamboo workpiece, the control terminal can also obtain one or more groups of surface roughness parameters of the sand belt sample. The surface roughness parameters of each group of sand belt sample can include but are not limited to the arithmetic mean height of the sand belt sample surface and the average curvature of the front vertex (that is, the arithmetic mean curvature of the peak vertex), and the arithmetic mean height and the average curvature of the front vertex are analyzed and processed to determine whether the abrasive wear is overall progressive wear (that is, many abrasives show a certain degree of uniform wear, which is manifested as a gradual change in the overall grinding surface roughness). The life assessment result of the sand belt sample is obtained from the perspective of judging whether the abrasive wear is overall progressive wear (that is, many abrasives show a certain degree of uniform wear, which is manifested as a gradual change in the overall grinding surface roughness). Here, the arithmetic mean height of the sand belt sample surface can reflect the overall wear condition of the sand belt sample surface, and as the wear intensifies, the arithmetic mean height gradually decreases; the average curvature of the front vertex of the sand belt sample surface can reflect the curvature change of the peak value of the sand belt sample surface texture. Usually, after the abrasives on the sand belt sample are uniformly worn, the average curvature of the front vertex will decrease accordingly.

[0034] As an option of the embodiment of the present application, obtaining at least one set of surface roughness parameters of the abrasive belt sample includes: Whenever the number of replacements of the wood or bamboo workpiece reaches a preset number threshold, the surface profile parameters of the abrasive belt sample are obtained; The arithmetic mean height and the average curvature of the front vertex are obtained according to each surface profile parameter, and each arithmetic mean height and the corresponding average curvature of the front vertex are used as a group of surface roughness parameters of the abrasive belt sample.

[0035] Specifically, the control terminal also establishes a connection with a three-dimensional profiler (for example, a VR series profiler device, a laser profile sensor, or other devices for measuring surface profiles, but not limited thereto) so that whenever the number of replacements of the wood or bamboo workpiece reaches a preset number threshold, and after the wood or bamboo workpiece that needs to be replaced is removed (to ensure the convenience and accuracy of the three-dimensional profiler in measuring and processing), the three-dimensional profiler can be controlled to measure and process the surface profile morphology of the sanding belt sample to obtain corresponding surface profile parameters, and each surface profile parameter is processed through a preset algorithm or automatic control program to obtain the corresponding arithmetic mean height and average curvature of the front vertex. It is understandable that when the abrasive belt sample is controlled to grind the wood and bamboo workpiece, the material of the wood and bamboo workpiece will gradually decrease as the grinding process proceeds. In order to ensure the accuracy of the life assessment results of the abrasive belt sample, the tester can also replace the wood and bamboo workpiece that does not meet the grinding requirements in a timely manner (the replaced wood and bamboo workpiece is consistent with the wood and bamboo workpiece before replacement in terms of material and size and other parameters), and the control terminal continues to control the abrasive belt sample to grind the replaced wood and bamboo workpiece according to the specified grinding parameters.

[0036] Here, the preset number threshold can be but is not limited to one, five, ten or twenty times. For example, taking five times as an example, every time the number of times the wood or bamboo workpiece is replaced reaches five times, the control terminal can control the three-dimensional profiler to measure and process the surface profile morphology of the abrasive belt sample (that is, periodically obtain the surface profile parameters of the abrasive belt sample), and in the embodiment of the present application, the processing method of obtaining the corresponding arithmetic mean height and the average curvature of the front vertex according to the surface profile parameters of the abrasive belt sample is a technical means well known in the art, which will not be elaborated here.

[0037] Then, after obtaining at least one arithmetic mean height and the corresponding average curvature of the front vertex, the control terminal can also use each arithmetic mean height and the corresponding average curvature of the front vertex as a group of surface roughness parameters of the abrasive belt sample, and can judge in real time whether the abrasive belt sample is evenly worn to the end of its life (i.e., failure) based on each group of surface roughness parameters. For example, but not limited to, when any group of surface roughness parameters is less than a preset roughness parameter threshold, it indicates that the abrasive belt sample is currently evenly worn to the end of its life; or when each group of surface roughness parameters is greater than or equal to the preset roughness parameter threshold, it indicates that the abrasive belt sample has not yet been evenly worn to the end of its life.

[0038] Step 104 : determining at least one grinding power slope based on the motor power of the driving roller at at least two acquisition moments and the idling power of the driving roller.

[0039] Specifically, after the abrasive belt sample is controlled to grind the wood or bamboo workpiece, the control terminal can also, but is not limited to, use a multifunctional electrical parameter meter to perform real-time power detection on the drive motor that controls the rotation of the drive roller, so as to obtain the active power of the drive motor at at least two acquisition moments (that is, the motor power when the abrasive belt sample is in contact with the wood or bamboo workpiece and grinding occurs), and can perform a difference calculation between each active power and the idling power of the drive roller to obtain the corresponding grinding power. It is understandable that the multifunctional electrical parameter meter can be, but is not limited to, a power meter known in the art, to obtain the motor power at each acquisition moment according to a preset time interval, thereby realizing real-time power detection of the drive motor.

[0040] Here, the idling power of the driving roller can be understood as the power used by the driving motor to control the driving roller to rotate the abrasive belt sample before controlling the abrasive belt sample to grind the wood or bamboo workpiece. It can be collected by the control terminal using a multi-function electrical parameter meter before controlling the abrasive belt sample to grind the wood or bamboo workpiece, and is not limited to this.

[0041] Furthermore, after obtaining the grinding power corresponding to each acquisition moment, the control terminal can, but is not limited to, use the cubic spline interpolation method to interpolate and smooth all acquisition moments and the grinding power corresponding to each acquisition moment to obtain a plurality of continuous curve powers and a curve moment corresponding to each curve power, and a smooth curve function can be obtained based on all the curve powers and all the curve moments. The cubic spline interpolation method may be a technical means well known in the art and will not be described in detail herein.

[0042] Here, the smooth curve function can be, but is not limited to, expressed as , x in the smooth curve function can be expressed as any curve moment, It can be expressed as the curve power of the corresponding curve moment. It can be understood that each curve power can be any of the grinding powers mentioned above, or an interpolation power obtained by interpolation and smoothing; each curve moment can be any of the acquisition moments mentioned above, or an interpolation moment obtained by interpolation and smoothing.

[0043] Also see here Figure 3 The schematic diagram of a smooth curve function provided by an embodiment of the present application is shown as follows: Figure 3 As shown, a smooth curve function can be generated by MATLAB software, which includes multiple curve point coordinates, each curve point coordinate can be composed of a curve moment (corresponding to the horizontal coordinate) and a corresponding curve power (corresponding to the vertical coordinate), and any two adjacent curve points can be connected by a smooth curve.

[0044] Furthermore, after obtaining the smooth curve function, the control terminal can also determine at least one grinding power slope based on the smooth curve function, for example but not limited to calculating the grinding power slope based on any two adjacent curve moments and the corresponding two curve powers, and by analyzing and processing all grinding power slopes, it is possible to determine whether the abrasive wear is local severe wear (that is, some abrasive grains on the sanding belt undergo sudden severe wear due to their own characteristics or local hard points of the processing object, which manifests as abnormal wear marks on the grinding surface of the workpiece) to obtain the life assessment result of the sanding belt sample.

[0045] It can be understood that when each grinding power slope is less than or equal to the preset slope threshold, it indicates that the sanding belt sample has not been locally severely worn to the end of its life; or when any grinding power slope is greater than the preset slope threshold, it indicates that the sanding belt sample has currently been locally severely worn to the end of its life.

[0046] As another option of the embodiment of the present application, the smooth curve function includes at least three curve powers and a curve moment corresponding to each curve power; At least one grinding power slope is determined based on the smooth curve function, including: Based on the adjacent curve powers and adjacent curve moments of each curve power in the smooth curve function, the first-order curve power of the corresponding curve power is calculated; Based on the adjacent first-order curve powers and adjacent curve moments of each first-order curve power, the second-order curve power of the corresponding first-order curve power is calculated; All second order curve powers are considered to have at least one grinding power slope.

[0047] Specifically, when the control terminal determines each grinding power slope in real time, it can calculate the first-order curve power of the corresponding curve power using the central difference algorithm based on the adjacent curve power and adjacent curve moment of each curve power in the smooth curve function. The calculation method can be but is not limited to the following: In the above formula, It can be the first-order curve power of the i-th curve power in the smooth curve function, can be the i+1th curve power in the smooth curve function, can be the i+1th curve moment in the smooth curve function, can be the i-1th curve power in the smooth curve function, It can be the i-1th curve moment in the smooth curve function.

[0048] It should be noted that when any curve power in the smooth curve function is the first curve power, the forward difference algorithm can be used to calculate the first curve power, the corresponding first curve moment, the second curve power in the smooth curve function, and the corresponding second curve moment to obtain the first-order curve power of the first curve power; when any curve power in the smooth curve function is the last curve power, the backward difference algorithm can be used to calculate the last curve power, the corresponding last curve moment, the second-to-last curve power in the smooth curve function, and the corresponding second-to-last curve moment to obtain the first-order curve power of the last curve power.

[0049] Next, after obtaining the first-order curve power of each curve power in the smooth curve function, the control terminal can also calculate the second-order curve power of the corresponding first-order curve power using a central difference algorithm based on the adjacent first-order curve power and adjacent curve moments of each first-order curve power. The calculation method can be but is not limited to the following: In the above formula, It can be the second-order curve power of the i-th first-order curve power in the smooth curve function, It can be the power of the adjacent i+1th first-order curve, can be the i+1th curve moment in the smooth curve function, It can be the power of the adjacent i-1th first-order curve, It can be the i-1th curve moment in the smooth curve function.

[0050] It should be noted that when any first-order curve power is the first first-order curve power, the forward difference algorithm can also be used for calculation, but it will not be elaborated here; when any first-order curve power is the last first-order curve power, the backward difference algorithm can also be used for calculation, but it will not be elaborated here.

[0051] Also see here Figure 4 The embodiment of the present application provides a schematic diagram of a first-order curve power and a second-order curve power, as shown in FIG. Figure 4 As shown, the upper part shows a schematic diagram of the first-order curve power display generated by MATLAB software, in which the horizontal axis corresponds to the curve time, and the vertical axis corresponds to the first-order curve power; the lower part shows a schematic diagram of the second-order curve power display obtained based on the above-mentioned first-order curve power generated by MATLAB software, in which the horizontal axis also corresponds to the curve time, and the vertical axis corresponds to the second-order curve power.

[0052] Then, the control terminal may use all the second-order curve powers calculated in real time as at least one grinding power slope, so as to facilitate subsequent judgment on whether the abrasive belt sample is locally severely worn to the end of its life.

[0053] Step 106: According to all the surface roughness parameters and all the grinding power slopes, the extension meters of the abrasive belt sample under the specified grinding parameters are obtained.

[0054] Specifically, after obtaining at least one set of surface roughness parameters and at least one grinding power slope, the control terminal may, but is not limited to, when it is detected that any grinding power slope exceeds a preset slope threshold and all surface roughness parameters are greater than or equal to a preset roughness parameter threshold, indicate that the abrasive wear of the abrasive belt sample is locally severe wear, that is, the abrasive belt sample is currently locally severely worn to the end of its life, and then the rotational linear speed of the abrasive belt sample can be calculated according to the rotation speed of the driving roller when the driving motor controls the rotation and the diameter of the driving roller, and the calculation method may, but is not limited to, refer to the following: In the above formula, v It can be the rotation speed of the abrasive belt sample (m / s), D Can be the diameter of the driving roller (mm), nThe speed (r / min) of the driving roller can be controlled for the driving motor.

[0055] Further, after obtaining the rotational linear speed of the abrasive belt sample, the control terminal can calculate the product of the rotational linear speed and the curve time corresponding to the grinding power to obtain the extended meters of the abrasive belt sample under the specified grinding parameters, that is, the life assessment result of the abrasive belt sample grinding the wood and bamboo workpiece under the specified abrasive belt speed and the specified grinding pressure. It is understandable that when the wood and bamboo workpiece is replaced once or more times, the control terminal can also obtain the grinding time of the abrasive belt sample according to the number of replacements of the wood and bamboo workpiece and the grinding time of each wood and bamboo workpiece, and calculate the product of the rotational linear speed and the grinding time of the abrasive belt sample, so as to obtain the extended meters of the abrasive belt sample under the specified grinding parameters, and is not limited to this.

[0056] It can also be understood that after obtaining at least one set of surface roughness parameters and at least one grinding power slope, the control terminal can, but is not limited to, when it detects that any set of surface roughness parameters is less than a preset roughness parameter threshold and all grinding power slopes do not exceed the preset slope threshold, it indicates that the abrasive wear of the sand belt sample is overall progressive wear, that is, the sand belt sample is currently evenly worn to the end of its life, and then the rotation linear speed of the sand belt sample can be obtained by referring to the above statement, and the grinding time of the sand belt sample can be obtained according to the number of replacement times of the wood and bamboo workpieces and the grinding time of each wood and bamboo workpiece, and then the product of the rotation linear speed and the grinding time of the sand belt sample is calculated to finally determine the extension number of meters of the sand belt sample under the specified grinding parameters.

[0057] Here, any set of surface roughness parameters less than a preset roughness parameter threshold can be expressed as the arithmetic mean height in any set of surface roughness parameters being less than the corresponding preset arithmetic mean height threshold, or the average curvature of the apex in any set of surface roughness parameters being less than the corresponding preset average curvature threshold of the apex; any set of surface roughness parameters greater than or equal to the preset roughness parameter threshold can be expressed as the arithmetic mean height in any set of surface roughness parameters being greater than or equal to the corresponding preset arithmetic mean height threshold, and the average curvature of the apex in the corresponding surface roughness parameters being greater than or equal to the corresponding preset average curvature threshold of the apex.

[0058] Also see here Figure 5 The following are contour morphologies of different grinding states of an abrasive belt when grinding a medium density fiberboard provided by an embodiment of the present application, such as Figure 5As shown, the left half shows the contour morphology corresponding to the initial stage of the abrasive belt grinding the medium density fiberboard. The arithmetic mean height obtained in the initial stage is 58.097, and the average curvature of the front vertex is 31.013; the right half shows the contour morphology corresponding to the uniform wear stage of the abrasive belt grinding the medium density fiberboard. The arithmetic mean height obtained in the uniform wear stage is 53.379, and the average curvature of the front vertex is 26.874. It can be seen that as the wear intensifies, the arithmetic mean height gradually decreases, and the average curvature of the front vertex decreases accordingly.

[0059] It should be noted that, for different specified grinding parameters, the extension meters of the abrasive belt sample under the corresponding specified grinding parameters can be obtained through one or more of the above embodiments, which will not be described in detail here.

[0060] As another option of the embodiment of the present application, the method further includes: When the thickness of the wood or bamboo workpiece is lower than a preset thickness threshold, the direct-acting cylinder is controlled to perform a reset action to replace the wood or bamboo workpiece; After the wood and bamboo workpiece is replaced, the abrasive belt sample is controlled according to the specified grinding parameters to grind the replaced wood and bamboo workpiece.

[0061] Specifically, after controlling the abrasive belt sample to grind the wood and bamboo workpiece, the control terminal can also perform real-time detection of the thickness of the currently ground wood and bamboo workpiece, and when it is detected that the thickness of the currently ground wood and bamboo workpiece is lower than the preset thickness threshold, it indicates that the currently ground wood and bamboo workpiece no longer meets the grinding requirements of the grinding abrasive belt sample, and then the travel switch can be used to perform a reset action on the direct-acting cylinder to retract the piston rod of the direct-acting cylinder to its original position, so that the test personnel can replace the wood and bamboo workpiece in time.

[0062] It is understandable that after the tester completes the replacement of the wood and bamboo workpiece, the control terminal can continue to control the abrasive belt sample to grind the replaced wood and bamboo workpiece according to the specified grinding parameters, and judge whether the abrasive belt sample is currently worn to the end of its life based on all the currently obtained surface roughness parameters and all grinding power slopes, until the extension number of meters of the abrasive belt sample under the specified grinding parameters is finally determined.

[0063] In one or more embodiments of the present application, by introducing the two key indicators of grinding power and belt surface roughness parameters, a more accurate judgment basis is provided for the selection of belts, which can not only reasonably evaluate the service life of the belts and avoid waste of materials and energy, but also has important significance for the optimization of the production process and cost control; in addition, through the dual application of the two indicators of grinding power and belt surface roughness parameters, it provides strong support for the optimization of grinding processes and cost control in actual production, which is of great significance to the development of the industry.

[0064] See next Figure 6 , Figure 6 A schematic structural diagram of a sanding belt life assessment system for mechanical grinding of wood and bamboo materials provided in an embodiment of the present application is shown.

[0065] The abrasive belt life evaluation system for mechanical grinding of wood and bamboo is applied to a wood and bamboo grinding device, which includes a driving roller for driving the abrasive belt sample to rotate and a direct-acting cylinder for pressing the wood and bamboo workpiece. Figure 6 As shown, the belt life assessment system for mechanical grinding of wood and bamboo materials may at least include a parameter determination module 601, a slope determination module 602 and a life assessment module 603, wherein: The parameter determination module 601 is used to control the abrasive belt sample to grind the wood or bamboo workpiece according to the specified grinding parameters, and obtain at least one set of surface roughness parameters of the abrasive belt sample; A slope determination module 602, configured to determine at least one grinding power slope based on the motor power of the driving roller and the idling power of the driving roller at at least two acquisition moments; The life evaluation module 603 is used to obtain the extension meters of the abrasive belt sample under the specified grinding parameters according to all surface roughness parameters and all grinding power slopes.

[0066] In some possible embodiments, specifying the grinding parameters includes specifying a grinding belt speed and specifying a grinding pressure; According to the specified grinding parameters, the abrasive belt sample is controlled to grind the wood and bamboo workpiece, including: After the abrasive belt sample is installed on the driving roller, the rotation speed of the driving roller is controlled to be the specified abrasive belt rotation speed, and the direct-acting cylinder is controlled to press the wood or bamboo workpiece toward the abrasive belt sample, so that the pressure between the wood or bamboo workpiece and the abrasive belt sample is the specified grinding pressure.

[0067] In some possible embodiments, obtaining at least one set of surface roughness parameters of abrasive belt samples includes: Whenever the number of replacements of the wood or bamboo workpiece reaches a preset number threshold, the surface profile parameters of the abrasive belt sample are obtained; The arithmetic mean height and the average curvature of the front vertex are obtained according to each surface profile parameter, and each arithmetic mean height and the corresponding average curvature of the front vertex are used as a group of surface roughness parameters of the abrasive belt sample.

[0068] In some possible embodiments, at least one grinding power slope is determined based on the motor power of the driving roller at at least two acquisition moments and the idling power of the driving roller, including: Acquire the motor power of the driving roller at at least two acquisition moments, and calculate the difference between each motor power and the idling power of the driving roller to obtain the corresponding grinding power; Perform interpolation and smoothing processing on all acquisition moments and the grinding power corresponding to each acquisition moment, and obtain a smooth curve function according to the processing results; At least one grinding power slope is determined based on the smooth curve function.

[0069] In some possible embodiments, the smooth curve function includes at least three curve powers and a curve moment corresponding to each curve power; At least one grinding power slope is determined based on the smooth curve function, including: Based on the adjacent curve powers and adjacent curve moments of each curve power in the smooth curve function, the first-order curve power of the corresponding curve power is calculated; Based on the adjacent first-order curve powers and adjacent curve moments of each first-order curve power, the second-order curve power of the corresponding first-order curve power is calculated; All second order curve powers are considered to have at least one grinding power slope.

[0070] In some possible embodiments, according to all surface roughness parameters and all grinding power slopes, the extension meters of the abrasive belt sample under the specified grinding parameters are obtained, including: When any grinding power slope exceeds a preset slope threshold, the rotation linear speed of the abrasive belt sample is obtained according to the rotation speed and diameter of the driving roller; The product of the rotational linear speed and the curve time corresponding to the grinding power slope is calculated to obtain the extension meters of the abrasive belt sample under the specified grinding parameters; or When any set of surface roughness parameters is less than a preset roughness parameter threshold, the rotational linear speed of the abrasive belt sample is obtained according to the rotation speed and diameter of the driving roller; The grinding time of the abrasive belt sample is calculated based on the number of replacement times of the wood and bamboo workpieces corresponding to the surface roughness parameters and the grinding time of each wood and bamboo workpiece, and the product of the rotary linear speed and the grinding time of the abrasive belt sample is calculated to obtain the extension meters of the abrasive belt sample under the specified grinding parameters.

[0071] In some possible embodiments, the belt life assessment system for mechanical grinding of wood and bamboo materials further includes: When the thickness of the wood or bamboo workpiece is lower than a preset thickness threshold, the direct-acting cylinder is controlled to perform a reset action to replace the wood or bamboo workpiece; After the wood and bamboo workpiece is replaced, the abrasive belt sample is controlled according to the specified grinding parameters to grind the replaced wood and bamboo workpiece.

[0072] Those skilled in the art can clearly understand that the technical solutions of the embodiments of the present application can be implemented with the help of software and / or hardware. The "unit" and "module" in this specification refer to software and / or hardware that can independently complete or cooperate with other components to complete specific functions, where the hardware can be, for example, a field programmable gate array (FPGA), an integrated circuit (IC), etc.

[0073] See also Figure 7 , Figure 7 A structural schematic diagram of another abrasive belt life assessment system for mechanical grinding of wood and bamboo materials provided in an embodiment of the present application is shown.

[0074] The abrasive belt life evaluation system for mechanical grinding of wood and bamboo is applied to a wood and bamboo grinding device, which includes a driving roller for driving the abrasive belt sample to rotate and a direct-acting cylinder for pressing the wood and bamboo workpiece. Figure 7 As shown, the abrasive belt life assessment system 700 for mechanical grinding of wood and bamboo materials may include at least one processor 701 , at least one network interface 704 , a user interface 703 , a memory 705 , and at least one communication bus 702 .

[0075] The communication bus 702 may be used to realize the connection and communication among the above-mentioned components.

[0076] The user interface 703 may include buttons, and the optional user interface may also include a standard wired interface or a wireless interface.

[0077] The network interface 704 may include, but is not limited to, a Bluetooth module, an NFC module, a Wi-Fi module, etc.

[0078] Among them, the processor 701 may include one or more processing cores. The processor 701 uses various interfaces and lines to connect various parts in the belt life assessment system 700 for mechanical grinding of wood and bamboo materials, and executes various functions and processes data of the belt life assessment system 700 for mechanical grinding of wood and bamboo materials by running or executing instructions, programs, code sets or instruction sets stored in the memory 705, and calling data stored in the memory 705. Optionally, the processor 701 can be implemented in at least one hardware form of DSP, FPGA, and PLA. The processor 701 can integrate one or a combination of CPU, GPU, modem, etc. Among them, the CPU mainly processes the operating system, user interface, and application program; the GPU is responsible for rendering and drawing the content to be displayed on the display screen; the modem is used to process wireless communication. It can be understood that the above-mentioned modem may not be integrated into the processor 701, and it can be implemented by a single chip.

[0079] The memory 705 may include RAM or ROM. Optionally, the memory 705 includes a non-transitory computer-readable medium. The memory 705 may be used to store instructions, programs, codes, code sets or instruction sets. The memory 705 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playback function, an image playback function, etc.), instructions for implementing the above-mentioned method embodiments, etc.; the data storage area may store data involved in the above-mentioned method embodiments, etc. The memory 705 may optionally be at least one storage device located away from the aforementioned processor 701. As Figure 7 As shown, the memory 705 as a computer storage medium may include an operating system, a network communication module, a user interface module, and an application program for evaluating the life of a sanding belt used for mechanical grinding of wood and bamboo materials.

[0080] Specifically, the processor 701 can be used to call the sanding belt life assessment application for mechanical grinding of wood and bamboo materials stored in the memory 705, and specifically perform the following operations: Controlling the abrasive belt sample to grind the wood or bamboo workpiece according to the specified grinding parameters, and obtaining at least one set of surface roughness parameters of the abrasive belt sample; Determining at least one grinding power slope based on the motor power of the driving roller at at least two acquisition moments and the idling power of the driving roller; Based on all surface roughness parameters and all grinding power slopes, the extension of the abrasive belt sample in meters under specified grinding parameters is obtained.

[0081] In some possible embodiments, specifying the grinding parameters includes specifying a grinding belt speed and specifying a grinding pressure; According to the specified grinding parameters, the abrasive belt sample is controlled to grind the wood and bamboo workpiece, including: After the abrasive belt sample is installed on the driving roller, the rotation speed of the driving roller is controlled to be the specified abrasive belt rotation speed, and the direct-acting cylinder is controlled to press the wood or bamboo workpiece toward the abrasive belt sample, so that the pressure between the wood or bamboo workpiece and the abrasive belt sample is the specified grinding pressure.

[0082] In some possible embodiments, obtaining at least one set of surface roughness parameters of abrasive belt samples includes: Whenever the number of replacements of the wood or bamboo workpiece reaches a preset number threshold, the surface profile parameters of the abrasive belt sample are obtained; The arithmetic mean height and the average curvature of the front vertex are obtained according to each surface profile parameter, and each arithmetic mean height and the corresponding average curvature of the front vertex are used as a group of surface roughness parameters of the abrasive belt sample.

[0083] In some possible embodiments, at least one grinding power slope is determined based on the motor power of the driving roller at at least two acquisition moments and the idling power of the driving roller, including: Acquire the motor power of the driving roller at at least two acquisition moments, and calculate the difference between each motor power and the idling power of the driving roller to obtain the corresponding grinding power; Perform interpolation and smoothing processing on all acquisition moments and the grinding power corresponding to each acquisition moment, and obtain a smooth curve function according to the processing results; At least one grinding power slope is determined based on the smooth curve function.

[0084] In some possible embodiments, the smooth curve function includes at least three curve powers and a curve moment corresponding to each curve power; At least one grinding power slope is determined based on the smooth curve function, including: Based on the adjacent curve powers and adjacent curve moments of each curve power in the smooth curve function, the first-order curve power of the corresponding curve power is calculated; Based on the adjacent first-order curve powers and adjacent curve moments of each first-order curve power, the second-order curve power of the corresponding first-order curve power is calculated; All second order curve powers are considered to have at least one grinding power slope.

[0085] In some possible embodiments, according to all surface roughness parameters and all grinding power slopes, the extension meters of the abrasive belt sample under the specified grinding parameters are obtained, including: When any grinding power slope exceeds a preset slope threshold, the rotation linear speed of the abrasive belt sample is obtained according to the rotation speed and diameter of the driving roller; The product of the rotational linear speed and the curve time corresponding to the grinding power slope is calculated to obtain the extension meters of the abrasive belt sample under the specified grinding parameters; or When any set of surface roughness parameters is less than a preset roughness parameter threshold, the rotational linear speed of the abrasive belt sample is obtained according to the rotation speed and diameter of the driving roller; The grinding time of the abrasive belt sample is calculated based on the number of replacement times of the wood and bamboo workpieces corresponding to the surface roughness parameters and the grinding time of each wood and bamboo workpiece, and the product of the rotary linear speed and the grinding time of the abrasive belt sample is calculated to obtain the extension meters of the abrasive belt sample under the specified grinding parameters.

[0086] In some possible embodiments, it further includes: When the thickness of the wood or bamboo workpiece is lower than a preset thickness threshold, the direct-acting cylinder is controlled to perform a reset action to replace the wood or bamboo workpiece; After the wood and bamboo workpiece is replaced, the abrasive belt sample is controlled according to the specified grinding parameters to grind the replaced wood and bamboo workpiece.

[0087] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0088] In the several embodiments provided in the present application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are only schematic, such as the division of units, which is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some service interfaces, and the indirect coupling or communication connection of devices or units can be electrical or other forms.

[0089] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0090] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0091] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a memory, including a number of instructions to enable a computer device (which can be a personal computer, server or network device, etc.) to execute all or part of the steps of the various embodiments of the present application. The aforementioned memory includes: U disk, read-only memory (ROM), random access memory (RAM), mobile hard disk, disk or optical disk and other media that can store program codes.

Claims

1. A method for evaluating the life of an abrasive belt used for mechanical grinding of wood and bamboo materials, characterized in that: The method is applied to a wood and bamboo material grinding device, the wood and bamboo material grinding device comprises a driving roller for driving an abrasive belt sample to rotate and a direct-acting cylinder for pressing a wood and bamboo material workpiece, and the method comprises: Controlling the abrasive belt sample to grind the wood or bamboo workpiece according to specified grinding parameters, and obtaining at least one set of surface roughness parameters of the abrasive belt sample; Determining at least one grinding power slope based on the motor power of the driving roller at at least two acquisition moments and the idling power of the driving roller; According to all the surface roughness parameters and all the grinding power slopes, the extension meters of the abrasive belt sample under the specified grinding parameters are obtained.

2. The method according to claim 1, characterized in that The specified grinding parameters include a specified grinding belt speed and a specified grinding pressure; The step of controlling the abrasive belt sample to grind the wood or bamboo workpiece according to the specified grinding parameters includes: After the abrasive belt sample is installed on the driving roller, the rotation speed of the driving roller is controlled to be the specified abrasive belt rotation speed, and the direct-acting cylinder is controlled to press the wood or bamboo workpiece toward the abrasive belt sample so that the pressure between the wood or bamboo workpiece and the abrasive belt sample is the specified grinding pressure.

3. The method according to claim 1, characterized in that The step of obtaining at least one set of surface roughness parameters of the abrasive belt sample comprises: Whenever the number of replacements of the wood or bamboo workpiece reaches a preset number threshold, the surface profile parameters of the abrasive belt sample are obtained; The arithmetic mean height and the average curvature of the front vertex are obtained according to each of the surface profile parameters, and each of the arithmetic mean height and the corresponding average curvature of the front vertex are used as a group of surface roughness parameters of the abrasive belt sample.

4. The method according to claim 1, characterized in that: The determining of at least one grinding power slope based on the motor power of the driving roller at at least two acquisition moments and the idling power of the driving roller comprises: Acquire the motor power of the driving roller at at least two acquisition moments, and calculate the difference between each motor power and the idling power of the driving roller to obtain the corresponding grinding power; Performing interpolation and smoothing processing on all the acquisition moments and the grinding power corresponding to each acquisition moment, and obtaining a smooth curve function according to the processing result; At least one grinding power slope is determined based on the smooth curve function.

5. The method according to claim 4, characterized in that The smooth curve function includes at least three curve powers and a curve moment corresponding to each of the curve powers; Determining at least one grinding power slope based on the smooth curve function comprises: Based on the adjacent curve powers and adjacent curve moments of each curve power in the smooth curve function, calculating the first-order curve power of the corresponding curve power; Based on the adjacent first-order curve powers and adjacent curve moments of each first-order curve power, calculating the second-order curve power of the corresponding first-order curve power; All of the second-order curve powers are used as at least one grinding power slope.

6. The method according to claim 5, characterized in that The step of obtaining the extension length of the abrasive belt sample under the specified grinding parameters according to all the surface roughness parameters and all the grinding power slopes includes: When any of the grinding power slopes exceeds a preset slope threshold, the rotational linear speed of the abrasive belt sample is obtained according to the rotational speed and diameter of the driving roller; Calculate the product of the rotation linear speed and the curve time corresponding to the grinding power slope to obtain the extension number of meters of the abrasive belt sample under the specified grinding parameters; or When any group of the surface roughness parameters is less than a preset roughness parameter threshold, the rotation linear speed of the abrasive belt sample is obtained according to the rotation speed and diameter of the driving roller; The grinding time of the abrasive belt sample is calculated based on the number of replacement times of the wood and bamboo workpieces corresponding to the surface roughness parameters and the grinding time of each of the wood and bamboo workpieces, and the product of the rotary linear speed and the grinding time of the abrasive belt sample is calculated to obtain the extended number of meters of the abrasive belt sample under the specified grinding parameters.

7. The method according to any one of claims 1 to 6, characterized in that: The method further comprises: When the thickness of the wood or bamboo material workpiece is lower than a preset thickness threshold, the direct-acting cylinder is controlled to perform a reset action to replace the wood or bamboo material workpiece; After the wood or bamboo workpiece is replaced, the abrasive belt sample is controlled to grind the replaced wood or bamboo workpiece according to the specified grinding parameters.

8. A belt life assessment system for mechanical grinding of wood and bamboo, characterized in that: The system is applied to a wood and bamboo material grinding device, the wood and bamboo material grinding device comprises a driving roller for driving the abrasive belt sample belt to rotate and a direct-acting cylinder for pressing the wood and bamboo material workpiece, and the system comprises: A parameter determination module, used for controlling the abrasive belt sample to grind the wood or bamboo workpiece according to the specified grinding parameters, and obtaining at least one set of surface roughness parameters of the abrasive belt sample; A slope determination module, configured to determine at least one grinding power slope based on the motor power of the driving roller at at least two acquisition moments and the idling power of the driving roller; The life evaluation module is used to obtain the extension meters of the abrasive belt sample under the specified grinding parameters according to all the surface roughness parameters and all the grinding power slopes.

9. A belt life assessment system for mechanical grinding of wood and bamboo, characterized in that: including a processor and a memory; The processor is connected to the memory; The memory is used to store executable program code; The processor runs a program corresponding to the executable program code by reading the executable program code stored in the memory, so as to execute the steps of the method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: The computer-readable storage medium stores instructions, and when the instructions are executed on a computer or a processor, the computer or the processor executes the steps of the method according to any one of claims 1 to 7.

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