Compensation method of spring compression type grinding sleeve wear compensation device based on Archard model

Abstract

The invention relates to a compensation method of a spring compression type grinding sleeve wear compensation device based on an Archard model. The spring compression type grinding sleeve wear compensation device based on the Archard model comprises a grinding shaft, a grinding sleeve, a spring compression assembly, a parameter acquisition module, a compensation execution mechanism and a control module. According to the solution integrating abrasion prediction, real-time monitoring and dynamic compensation, accurate compensation of abrasion of the grinding sleeve is achieved by constructing the abrasion prediction model fusing the compression characteristics of the spring and combining a pressure feedback adjusting mechanism, and the stability and consistency of the machining process are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of machining and grinding equipment technology, and specifically to a compensation method for a spring-loaded grinding sleeve wear compensation device based on the Archard model. Background Technology

[0002] In the grinding of mechanical parts, the continuous friction between the grinding sleeve and the workpiece leads to wear, increasing the grinding gap and causing unstable processing pressure. This results in out-of-tolerance dimensional accuracy and decreased surface quality. Traditional solutions often involve periodically stopping the machine to replace the grinding sleeve or manually adjusting its position, which suffers from low processing efficiency, high cost, and poor accuracy consistency.

[0003] The Archard model is a classic theory describing material wear, and it can accurately predict wear through process parameters. However, there is currently no technology to combine it with a spring-loaded clamping structure to achieve real-time, automatic compensation for wear of the grinding sleeve. Therefore, this invention designs a compensation method based on a wear prediction model and adapted to a spring-loaded clamping structure, which is of great significance for improving the quality and efficiency of grinding processes. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a compensation method for a spring-loaded grinding sleeve wear compensation device based on the Archard model, integrating "wear prediction, real-time monitoring, and dynamic compensation" into a unified solution. By constructing a wear prediction model that incorporates the characteristics of spring compression and combining it with a pressure feedback adjustment mechanism, precise compensation for grinding sleeve wear is achieved, ensuring the stability and consistency of the processing.

[0005] The technical problem solved by this invention is achieved through the following technical solution: A compensation method for a spring-compressed grinding sleeve wear compensation device based on the Archard model, wherein the spring-compressed grinding sleeve wear compensation device based on the Archard model includes a grinding shaft, a grinding sleeve, a spring-compressing assembly, a parameter acquisition module, a compensation execution mechanism, and a control module; The spring clamping assembly includes a spring and a pressure sensor to collect pressure data acting on the grinding surface in real time; The parameter acquisition module includes a temperature sensor, a speed sensor, and a displacement sensor, which acquires the temperature difference ΔT in the grinding zone, the speed n of the grinding shaft, and the feed rate. The compensation execution mechanism includes a servo motor; The control module includes an algorithm running unit and an execution control unit. It receives data collected by each module, runs the wear prediction and compensation algorithm, outputs control signals, and achieves pressure compensation by adjusting the spring compression. The compensation method for the wear compensation device of the spring-compressed grinding sleeve based on the Archard model includes the following steps: Step 1: Establish a wear prediction model to modify the Archard model: Introducing a pressure transmission coefficient γ related to the spring constant k, and integrating multi-condition parameter corrections, the wear amount W is calculated. 修正 The formula is as follows: W 修正 ; Where: P is the actual grinding pressure, N is the pressure sensor acquisition coefficient, γ is the spring pressure sensor coefficient, k is the wear coefficient, v is the relative linear velocity of grinding, t is the grinding time, and H is the hardness of the grinding sleeve material. , This is the working condition influence coefficient (the correction coefficient for wear caused by temperature and feed rate). The temperature change during the grinding process is represented by f, and the workpiece feed rate is represented by f. Step 2, Spring pressure compensation formula and adjustment logic: (1) Compensation triggering conditions: When the calculated wear amount W 修正 ≥0.8 When Wmax is set to 10% of the initial thickness of the grinding sleeve, the compensation program is activated. (2) Formula for calculating compensation pressure: P 补偿 =P 初始 (Wmax / (Wmax-W)) 修正 )); (3) Execute adjustment logic: 1) The control module calculates the spring compression based on P compensation. = P 补偿 / k; 2) The drive compensation actuator adjusts the spring compression to achieve real-time pressure compensation; 3) Set safety constraints: P 补偿 The upper limit is 1.5 times the initial value of P to avoid damage to the spring due to overload; Step 3, Compensation Process: a) Parameter calibration (preliminary experimental stage): By testing the actual pressure value P and wear amount W under different spring compressions, and using least squares regression to fit the data, k and wear values ​​were obtained. , The specific values ​​of γ are used to complete the model parameter calibration; b) Real-time monitoring (grinding stage): The control module collects P and V data at a frequency of 1 time per second. The data (f) is input into the wear prediction model to calculate W in real time. 修正 ; c) Compensation Execution (Closed-Loop Control): When W 修正 The trigger threshold of 0.8 has been reached. When Wmax is reached, the control module algorithm execution unit automatically calculates the P compensation and the corresponding spring compression. Adjust the spring clamping assembly to complete pressure compensation; after compensation, collect data again to verify the compensation effect and form a closed-loop control.

[0006] Furthermore, the grinding sleeve is a cylindrical structure with a grinding working surface, made of high-hardness alloy material, and the grinding surface is machined with grinding patterns. The grinding surface is designed according to the end plane size of the workpiece, and a wear allowance of 0.5-1mm is reserved according to the depth of the grinding patterns.

[0007] Furthermore, the spring is a cylindrical helical compression spring with a stiffness coefficient designed according to the preset grinding pressure to ensure that the pressure fluctuation range does not exceed ±5%; the pressure sensor adopts a strain gauge type with a measurement accuracy of 0.1N.

[0008] Furthermore, the servo motor is a stepper servo motor with a rated torque of 0.5 N·m; the ball screw lead is 5 mm, and in conjunction with the linear guide rail, a displacement resolution of 0.0005 mm is achieved.

[0009] The advantages and positive effects of this invention are: 1. The compensation method of the spring-pressed grinding sleeve wear compensation device based on the Archard model of the present invention has accurate prediction: by integrating the spring pressure transmission coefficient and multiple working parameters, the wear prediction deviation is reduced to within 3%.

[0010] 2. The compensation method of the spring-pressed grinding sleeve wear compensation device based on the Archard model of the present invention has a real-time response: high-frequency data acquisition and compensation calculation every second, which solves the problem of lag in traditional compensation.

[0011] 3. The compensation method of the spring-pressed grinding sleeve wear compensation device based on the Archard model of the present invention is safe and reliable: it sets an upper limit for compensation pressure, taking into account both compensation accuracy and equipment safety.

[0012] 4. The compensation method of the spring-pressed grinding sleeve wear compensation device based on the Archard model of the present invention has strong versatility: the spring elastic coefficient is adjustable (500-1000N / mm) to adapt to the grinding needs of different hardness operations.

[0013] 5. The compensation method of the spring-compression grinding sleeve wear compensation device based on the Archard model of this invention is a solution integrating "wear prediction, real-time monitoring, and dynamic compensation". By constructing a wear prediction model that incorporates the characteristics of spring compression and combining it with a pressure feedback adjustment mechanism, accurate compensation for grinding sleeve wear is achieved, ensuring the stability and consistency of the processing. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the wear compensation device for the spring-pressed grinding sleeve based on the Archard model of the present invention.

[0015] In the picture: 1-Grinding shaft; 2-Grinding sleeve; 3-Spring clamping assembly; 4-Parameter acquisition module; 5-Control module positioning support surface; 6-Spring; 7-Pressure sensor; 8-Stepper servo motor. Detailed Implementation

[0016] The present invention will be further described in detail below through specific embodiments. The following embodiments are merely descriptive and not limiting, and should not be used to limit the scope of protection of the present invention.

[0017] A compensation method for a spring-pressed grinding sleeve wear compensation device based on the Archard model. The spring-pressed grinding sleeve wear compensation device based on the Archard model includes a grinding shaft 1, a grinding sleeve 2, a spring pressing assembly 3, a parameter acquisition module 4, a compensation execution mechanism and a control module 5. The grinding sleeve 2 is a cylindrical structure with a grinding working surface. It is made of high-hardness alloy material, such as WC-Co cemented carbide. The grinding surface is machined with grinding patterns. The grinding surface is designed according to the end face size of the workpiece, and a wear allowance of 0.5-1mm is reserved according to the depth of the grinding patterns.

[0018] The spring clamping assembly 3 includes a spring 6 and a pressure sensor 7, which provides grinding pressure P (N) and collects pressure data acting on the grinding surface in real time. The elastic coefficient k of the spring 6 is preset to 500-1000N / mm to adapt to different grinding requirements. The spring 6 is a cylindrical helical compression spring 6, and the stiffness coefficient is designed according to the preset grinding pressure to ensure that the pressure fluctuation range does not exceed ±5%. The pressure sensor 7 adopts a strain gauge type with a measurement accuracy of 0.1N.

[0019] The parameter acquisition module 4 includes a temperature sensor, a speed sensor, and a displacement sensor. The temperature sensor acquires the temperature difference ΔT in the grinding zone; the speed sensor acquires the rotational speed n of the grinding shaft 1 and calculates the relative linear velocity v; and the displacement sensor acquires the feed rate. The compensation actuator includes a servo motor; the servo motor is a stepper servo motor 8 with a rated torque of 0.5 N·m; the ball screw has a lead of 5 mm, and together with the linear guide, it achieves a displacement resolution of 0.0005 mm.

[0020] Control module 5 includes an algorithm running unit and an execution control unit, which can receive data collected by each module, run wear prediction and compensation algorithms, output control signals, and achieve pressure compensation by adjusting the compression of spring 6; The compensation method for a spring-loaded grinding sleeve wear compensation device based on the Archard model includes the following steps: Step 1: Establish a wear prediction model to modify the Archard model: A pressure transmission coefficient γ, related to the spring constant k, is introduced, with γ = 0.9-0.98. Through preliminary experimental calibration, γ = 0.95 when k = 800 N / mm. This is then combined with multi-condition parameter correction to determine the wear amount W. 修正 The formula is as follows: W 修正 ; Where: P is the actual grinding pressure, N is the coefficient collected by pressure sensor 7, γ is the coefficient of spring 6 and pressure sensor 7, k is the wear coefficient, v is the relative linear velocity of grinding, t is the grinding time, and H is the hardness of the grinding sleeve 2 material. , This is the working condition influence coefficient (the correction coefficient for wear caused by temperature and feed rate). The temperature change during the grinding process is represented by f, and the workpiece feed rate is represented by f. Step 2, Spring 6 pressure compensation formula and adjustment logic: (1) Compensation triggering conditions: When the calculated wear amount W 修正 ≥0.8 When Wmax is set, Wmax is 10% of the initial thickness of the grinding sleeve 2, and the compensation program is started. (2) Formula for calculating compensation pressure: P 补偿 =P 初始 (Wmax / (Wmax-W)) 修正 )); (3) Execute adjustment logic: 1) Control module 5 calculates the compression of spring 6 based on P compensation. = P 补偿 / k; 2) The drive compensation actuator adjusts the compression of spring 6 to achieve real-time pressure compensation; 3) Set safety constraints: P 补偿 The upper limit is 1.5 times the initial value of P to avoid overload damage to spring 6; Step 3, Compensation Process: a) Parameter calibration (preliminary experimental stage): By testing the actual pressure value P and wear amount W under different spring compressions, and using least squares regression to fit the data, k and wear values ​​were obtained. , The specific values ​​of γ are used to complete the model parameter calibration; b) Real-time monitoring (grinding stage): Control module 5 collects P, V, and P values ​​at a frequency of 1 time per second. The data (f) is input into the wear prediction model to calculate W in real time. 修正 ; c) Compensation Execution (Closed-Loop Control): When W 修正 The trigger threshold of 0.8 has been reached. When Wmax is reached, the algorithm execution unit of control module 5 automatically calculates the P compensation and the corresponding compression of spring 6. Adjust the spring clamping assembly 3 to complete pressure compensation; after compensation, collect data again to verify the compensation effect and form a closed-loop control.

[0021] Example: 1. Parameter calibration: The wear coefficient k of the grinding sleeve 2 material is measured through a pre-experiment. For example, the same process is used to grind a standard test piece, the wear amount and process parameters are recorded, the k value is calculated and entered into the control module 5.

[0022] 2. Real-time monitoring: Taking the end face grinding of shaft parts as an example, after the device is started, the drive motor drives the spindle and grinding sleeve 2 to rotate (speed 1000r / min), and the spring clamping assembly 3 applies a grinding pressure of 100N; the pressure sensor 7 collects pressure data every 10ms, and the control module 5 calculates the relative sliding speed (about 1.57m / s) synchronously.

[0023] 3. Compensation Execution: When the grinding time reaches 60 seconds, the wear amount is calculated according to the Archard model. If the compensation threshold is set to mm, the control module 5 immediately drives the servo motor, causing the grinding sleeve 2 to kick towards the workpiece. mm, compensation completed.

[0024] This invention presents a compensation method for a spring-loaded grinding sleeve wear compensation device based on the Archard model. It offers precise prediction: by integrating the pressure transmission coefficient of spring 6 with multiple operational parameters, the wear prediction deviation is reduced to within 3%. Real-time response: high-frequency data acquisition and compensation calculation every second solves the lag problem of traditional compensation methods. Safe and reliable: a compensation pressure upper limit is set, balancing compensation accuracy and equipment safety. High versatility: the elastic coefficient of spring 6 is adjustable (500-1000 N / mm), adapting to the grinding needs of different hardness applications.

[0025] Although embodiments and drawings of the present invention have been disclosed for illustrative purposes, those skilled in the art will understand that various substitutions, variations and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A compensation method for a spring-loaded grinding sleeve wear compensation device based on the Archard model, characterized in that: The spring-loaded grinding sleeve wear compensation device based on the Archard model includes a grinding shaft, a grinding sleeve, a spring-loaded assembly, a parameter acquisition module, a compensation execution mechanism, and a control module. The spring clamping assembly includes a spring and a pressure sensor to collect pressure data acting on the grinding surface in real time; The parameter acquisition module includes a temperature sensor, a speed sensor, and a displacement sensor, which acquires the temperature difference ΔT in the grinding zone, the speed n of the grinding shaft, and the feed rate. The compensation execution mechanism includes a servo motor; The control module includes an algorithm running unit and an execution control unit. It receives data collected by each module, runs the wear prediction and compensation algorithm, outputs control signals, and achieves pressure compensation by adjusting the spring compression. The compensation method for the wear compensation device of the spring-compressed grinding sleeve based on the Arcard model includes the following steps: Step 1: Establish a wear prediction model to modify the Archard model: Introducing a pressure transmission coefficient γ related to the spring constant k, and integrating multi-condition parameter corrections, the wear amount W is calculated. 修正 The formula is as follows: W 修正 ； Where: P is the actual grinding pressure, N is the pressure sensor acquisition coefficient, γ is the spring pressure sensor coefficient, k is the wear coefficient, v is the relative linear velocity of grinding, t is the grinding time, and H is the hardness of the grinding sleeve material. , This is the working condition influence coefficient (the correction coefficient for wear caused by temperature and feed rate). The temperature change during the grinding process is represented by f, and the workpiece feed rate is represented by f. Step 2, Spring pressure compensation formula and adjustment logic: (1) Compensation triggering conditions: When the calculated wear amount W 修正 ≥0.8 When Wmax is set to 10% of the initial thickness of the grinding sleeve, the compensation program is activated. (2) Formula for calculating compensation pressure: P 补偿 =P 初始 (Wmax / (Wmax-W)) 修正 )); (3) Execute adjustment logic: 1) The control module calculates the spring compression based on P compensation. = P 补偿 / k; 2) The drive compensation actuator adjusts the spring compression to achieve real-time pressure compensation; 3) Set safety constraints: P 补偿 The upper limit is 1.5 times the initial value of P to avoid damage to the spring due to overload; Step 3, Compensation Process: a) Parameter calibration (preliminary experimental stage): By testing the actual pressure value P and wear amount W under different spring compressions, and using least squares regression to fit the data, k and wear values ​​were obtained. , The specific values ​​of γ are used to complete the model parameter calibration; b) Real-time monitoring (grinding stage): The control module collects P, V, and P values ​​at a frequency of 1 time per second. The f data is substituted into the wear prediction model to calculate W in real time. 修正 ; c) Compensation Execution (Closed-Loop Control): When W 修正 The trigger threshold of 0.8 has been reached. When Wmax is reached, the algorithm execution unit of the control module automatically calculates the P compensation and the corresponding spring compression. Adjust the spring clamping assembly to complete pressure compensation; after compensation, collect data again to verify the compensation effect and form a closed-loop control.

2. The compensation method for the wear compensation device of the spring-compressed grinding sleeve based on the Archard model according to claim 1, characterized in that: The grinding sleeve is a cylindrical structure with a grinding working surface. It is made of high-hardness alloy material and the grinding surface is machined with grinding patterns. The grinding surface is designed according to the end plane size of the workpiece and a wear allowance of 0.5-1mm is reserved according to the depth of the grinding patterns.

3. The compensation method for the wear compensation device of the spring-compressed grinding sleeve based on the Archard model according to claim 1, characterized in that: The spring is a cylindrical helical compression spring, and its stiffness coefficient is designed according to the preset grinding pressure to ensure that the pressure fluctuation range does not exceed ±5%. The pressure sensor is a strain gauge type with a measurement accuracy of 0.1N.

4. The compensation method for the wear compensation device of the spring-compressed grinding sleeve based on the Archard model according to claim 1, characterized in that: The servo motor is a stepper servo motor with a rated torque of 0.5 N·m; the ball screw lead is 5 mm, and with the help of the linear guide, the displacement resolution is 0.0005 mm.

Images