Lightweight double-station cutting and grinding machine and control method thereof

Abstract

The invention discloses a lightweight double-station cutting and grinding machine and a control method thereof, and belongs to the field of rock sample preparation, the lightweight double-station cutting and grinding machine comprises a workbench, the top end of the workbench is provided with a spacing-adjustable double-station cutting and grinding mechanism, a rock core clamping mechanism, a feeding mechanism, a control mechanism integrated with a Type-3 fuzzy logic controller, and a multi-source sensing mechanism; the rock core clamping mechanism is arranged on the feeding mechanism, and the feeding mechanism is used for driving the rock core clamping mechanism to move in the direction close to or away from the double-station cutting and grinding mechanism to achieve feeding. According to the light-weight double-station cutting and grinding machine and the control method thereof, on the basis of light-weight structural design, multi-source sensing and Type-3 fuzzy logic cooperative control are combined, and self-adaption, high efficiency, accuracy, safety and controllability of rock core sample preparation are achieved.

Description

Technical Field

[0001] This invention relates to the field of rock sample preparation technology, and in particular to a lightweight dual-station cutting and grinding machine and its control method. Background Technology

[0002] In fields such as geological exploration, construction engineering testing, and mineral resource assessment, rock sample preparation is a crucial preliminary step for obtaining accurate geological parameters (such as uniaxial compressive strength and permeability). The efficiency and accuracy of sample preparation directly affect the reliability of subsequent testing results. Currently, the core of rock sample preparation relies on cutting and grinding equipment to cut and shape the rock core. However, existing technologies have multiple drawbacks and struggle to meet the demands for efficient, accurate, and flexible sample preparation, as detailed below: Traditional rock cutting and grinding machines, in pursuit of structural rigidity, often use heavy materials such as cast iron and thick-walled steel to construct the machine body, worktable, and moving parts. The weight of these machines generally exceeds 50 kg, with some large machines even exceeding 100 kg. This design makes the equipment difficult to move, especially in mobile sample preparation scenarios such as field geological exploration and on-site engineering testing, requiring hoisting or multi-person collaboration, which greatly limits operational flexibility. At the same time, the heavy structure occupies a large workspace, easily leading to overcrowding and insufficient operating space when multiple machines are operating in parallel in the laboratory, making it unsuitable for the needs of compact working environments.

[0003] Meanwhile, the uniaxial compressive strength and wear resistance index of different lithologies (such as sandstone UCS of approximately 20-50 MPa and granite UCS of approximately 100-200 MPa) can vary by more than 10 times, and the same rock core may contain inhomogeneous structures such as interlayers and fissures. Traditional cutting and grinding machines use fixed parameter control modes (such as preset fixed feed speed and electric spindle speed), which cannot dynamically adjust parameters according to real-time working conditions. If soft rock parameters are used for hard rock, it will lead to overload of the electric spindle and rapid wear of the cutting tools (cutter head / grinding wheel) (life shortened by 30%-50%); if hard rock parameters are used for soft rock, it is easy to cause excessive cutting of the rock core and dimensional deviations (error exceeding ±0.5 mm). Summary of the Invention

[0004] The purpose of this invention is to provide a lightweight dual-station cutting and grinding machine and its control method to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the present invention provides a lightweight dual-station cutting and grinding machine, including a worktable, and an adjustable-spacing dual-station cutting and grinding mechanism, a core clamping mechanism, a feeding mechanism, a control mechanism integrating a Type-3 fuzzy logic controller, and a multi-source sensing mechanism at the top of the worktable. The core clamping mechanism is disposed on the feeding mechanism, and the feeding mechanism is used to drive the core clamping mechanism to move towards or away from the dual-station cutting and grinding mechanism to achieve feeding. The multi-source sensing mechanism includes a first current sensor, a second current sensor, an NTC temperature sensor, a triaxial vibration sensor, a pressure sensor, and an industrial camera, which are used to collect the electric spindle current, feed current, operating temperature, vibration signal, core clamping force, and core positioning image. The input end of the multi-source sensing mechanism is electrically connected to the control mechanism, and the output end of the control mechanism is electrically connected to the dual-station cutting and grinding mechanism and the feed mechanism, respectively, to realize adaptive core sample preparation.

[0006] A method for operating a lightweight dual-station cutting and grinding machine includes the following steps: S1. Based on the design parameters of the dual-station cutting and grinding machine, the target size of the rock core and the material parameters of the rock core, calibrate the mechanical parameters, preset the control parameters and safety thresholds, and calibrate the multi-source sensing mechanism. S2. Remove the upper clamping block, place the rock core in the clamping channel, reassemble the clamping block, and turn on the electric spindle, spacing adjustment motor, and feed motor until the cutter head or grinding wheel contacts the surface of the rock core. At this time, the operating status data of the dual-station cutting and grinding machine is collected synchronously through the multi-source sensing mechanism, and after preprocessing, the features are fused through the ACI-GNN model to obtain the working condition feature vector. S3. Based on the working condition feature vector, control target and core material parameters, the adjustment instruction set is generated using the fuzzy rules of T3-FLC. The adjustment instruction set includes the spacing adjustment instruction, the feed speed adjustment instruction and the electric spindle adjustment instruction. S4. Output the spacing adjustment command, feed speed adjustment command, and electric spindle adjustment command to the spacing adjustment motor, feed motor, and electric spindle respectively to execute the sample preparation action.

[0007] Therefore, the present invention employs the above-mentioned lightweight dual-station cutting and grinding machine and its control method, which has the following beneficial effects: 1. Significant lightweight advantages: The key structure uses 6061-T6 aluminum alloy, and the cutting and grinding components use 7075 aluminum alloy honeycomb structure and composite coating, which greatly reduces the weight of the equipment and improves portability and flexibility of use. 2. Strong sample preparation adaptability: The distance between the two workstations is adjustable via the positive and negative threaded screws, and the core clamping range can cover different diameter requirements, adapting to core sample preparation of various sizes and materials; 3. High control precision: The multi-source sensing mechanism collects six types of operating data, which are then fused by the ACI-GNN model and dynamically adjusted by T3-FLC to achieve coordinated adaptation of spacing, feed speed and electric spindle parameters, thereby improving the sample preparation size accuracy; 4. Improved operational efficiency: The dual-station parallel operation combined with linkage adjustment logic reduces the time spent on parameter debugging, and the instruction correction and smooth transition design reduces operational fluctuations and improves sample preparation efficiency. 5. Comprehensive safety protection: It has preset multi-dimensional safety thresholds and is equipped with a graded protection mechanism. In case of abnormality, it will trigger alarms, reduce power or shut down to ensure equipment stability and operator safety.

[0008] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the overall structure of a lightweight dual-station cutting and grinding machine according to the present invention.

[0010] Figure Labels 1. Worktable; 2. Electric spindle; 3. Fixed base; 4. Industrial camera; 5. Forward and reverse lead screws; 6. Guide rod; 7. Sliding seat; 8. Gap adjustment motor; 9. Cutter head; 10. Core; 11. Slide rail; 12. Upper clamping block; 13. Lower clamping block; 14. Feed motor; 15. Feed nut; 16. L-shaped fixing plate. Detailed Implementation

[0011] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the embodiments of the present invention and are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of this application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0012] It should be noted that the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, such as a process, method, system, product, or server that includes a series of steps or units, not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product, or device.

[0013] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0014] like Figure 1As shown, a lightweight dual-station cutting and grinding machine includes a worktable 1. The top of the worktable 1 is equipped with an adjustable-spacing dual-station cutting and grinding mechanism, a core 10 clamping mechanism, a feeding mechanism, a control mechanism integrating a Type-3 fuzzy logic controller, and a multi-source sensing mechanism. The core 10 clamping mechanism is mounted on the feeding mechanism, which drives the core 10 clamping mechanism to move closer to or further away from the dual-station cutting and grinding mechanism to achieve feeding. The multi-source sensing mechanism includes a first current sensor, a second current sensor, an NTC temperature sensor, a triaxial vibration sensor, a pressure sensor, and an industrial camera 4, used to collect data on the current of the electric spindle 2, the feeding current, the operating temperature, vibration signals, the core 10 clamping force, and the core positioning image. The multi-source sensing mechanism is electrically connected to the input of the control mechanism, and the output of the control mechanism is electrically connected to both the dual-station cutting and grinding mechanism and the feeding mechanism, enabling adaptive core 10 sample preparation.

[0015] The dual-station cutting and grinding mechanism includes two sets of cutting and grinding units and a spacing adjustment unit. The spacing adjustment unit includes a positive and negative threaded screw 5 mounted on the top of the worktable 1 via a fixed base 3. The two ends of the positive and negative threaded screw 5 are respectively rotatably connected to the two fixed bases 3, and one end of the positive and negative threaded screw 5 is fixedly connected to a spacing adjustment motor 8 fixed on the fixed base 3. Positive thread nuts and negative thread nuts are respectively threaded onto the positive thread and the negative thread of the positive and negative threaded screw 5. The positive thread nuts and negative thread nuts are respectively connected to the two sets of cutting and grinding units via sliding seats 7, and are used to adjust the spacing between the two sets of cutting and grinding units. In this embodiment, the sliding seat 7 is also slidably connected to the guide rod 6 fixed on the fixed base 3 to achieve stable sliding. Both sets of cutting and grinding units include an electric spindle 2 fixedly connected to the sliding seat 7. The output end of the electric spindle 2 is detachably fixed with a cutter head 9 or a grinding wheel. In this embodiment, the electric spindle 2 fixes the cutter head 9 or the grinding wheel via a flange and bolts.

[0016] The feeding mechanism includes an L-shaped fixed plate 16 fixed to the top of the worktable 1, a lead screw passing through the L-shaped fixed plate 16, a feeding motor 14 fixed to the L-shaped fixed plate 16 and fixedly connected to one end of the lead screw, and a feeding nut 15 threadedly connected to the lead screw. The feeding nut 15 is fixed to the top of the sliding base, and a core 10 clamping mechanism is also fixed to the top of the sliding base. The bottom end of the sliding base is slidably connected to the slide rail 11 fixed to the worktable 1. The movement direction of the feeding nut 15 and the direction of the slide rail 11 are both perpendicular to the line connecting the two sets of cutting and grinding units.

[0017] The core 10 clamping mechanism includes a lower clamping block 13 fixed on an L-shaped fixing plate 16 and an upper clamping block 12 located directly above the lower clamping block 13. A clamping channel is formed between the upper clamping block 12 and the lower clamping block 13, and the core 10 is clamped in the clamping channel. The upper clamping block 12 and the lower clamping block 13 are fixed together by fastening bolts.

[0018] The first current sensor is connected in series in the power supply circuit of the electric spindle 2, the second current sensor is connected in series in the power supply circuit of the feed motor 14, the NTC temperature sensor is attached to the housing of the electric spindle 2, the triaxial vibration sensor is installed on the sliding seat 7, the pressure sensor is set on the side of the lower clamping block 13 facing the upper clamping block 12, and the industrial camera 4 is mounted directly above the core 10 clamping mechanism; the multi-source sensing mechanism also includes a laser interferometer for acquiring the lead screw; the worktable 1, fixed seat 3, sliding seat 7, sliding base, and L-shaped fixed plate 16 are all made of 6061-T6 aluminum alloy; the cutter head 9 and the grinding wheel are made of 7075 aluminum alloy honeycomb structure, and a 5μm thick Ti transition layer and a 15μm-20μm thick MoS2-TiAlN composite coating are deposited sequentially on the surface of the 7075 aluminum alloy honeycomb structure.

[0019] It should be noted that the above electronic products are all mature products on the market. This embodiment only requires purchasing them and connecting them according to the instruction manual. No changes have been made to their circuit connection structure. Therefore, the circuit connection structure and principle will not be described in detail here.

[0020] A method for operating a lightweight dual-station cutting and grinding machine includes the following steps: S1. Based on the design parameters of the dual-station cutting and grinding machine, the target size of the rock core and the material parameters of the rock core, calibrate the mechanical parameters, preset the control parameters and safety thresholds, and calibrate the multi-source sensing mechanism. The calibrated mechanical parameters described in step S1 , These represent the initial spacing between the two sets of cutting and grinding units after calibration, the rated power and speed of the electric spindle, the clamping range of the core clamping mechanism, and the feed parameters, respectively. , These represent the minimum and maximum clamping diameters of the calibrated core clamping mechanism, respectively. , These represent the lead screw, rated speed of the feed motor, and reference value of the feed speed, respectively. , Indicates the maximum feed rate. and All of these represent material correction factors. Indicates the uniaxial compressive strength of the rock core. Indicates the core abrasion resistance index; Control parameters , These represent the membership function parameters of the Type-3 fuzzy logic controller, the rule parameters of the adaptive neural fuzzy inference system, and the error compensation coefficients, respectively. , These represent the spacing deviation, the change in spacing deviation, and the quantization coefficient of the output in the Type-3 fuzzy logic controller, respectively. , These represent the d-axis voltage, q-axis voltage, d-axis current, and q-axis current of the electric spindle stator, respectively. Safety threshold , These represent the electric spindle temperature threshold, electric spindle current threshold, vibration acceleration threshold, and clamping force current threshold, respectively.

[0021] S2. Remove the upper clamping block, place the rock core in the clamping channel, reassemble the clamping block, and turn on the electric spindle, spacing adjustment motor, and feed motor until the cutter head or grinding wheel contacts the surface of the rock core. At this time, the operating status data of the dual-station cutting and grinding machine is collected synchronously through the multi-source sensing mechanism, and after preprocessing, the features are fused through the ACI-GNN model to obtain the working condition feature vector. The operating status data of the dual-station cutting and grinding machine mentioned in step S2 includes electric spindle current, temperature, feed current, triaxial vibration acceleration, clamping force current, and core clamping images; the resulting operating condition feature vector ; in, These represent the load characteristics, temperature characteristics, vibration characteristics, core positioning characteristics, wear characteristics of the cutting and grinding components, and feed characteristics of the electric spindle, respectively.

[0022] In step S2, it is also determined in real time whether the collected data exceeds the safety threshold preset in S1. If the warning threshold is triggered, the sound and light alarm is activated and the power of the electric spindle is reduced by 10%. If the emergency stop threshold is triggered, the power supply of the power mechanism is immediately cut off and the clamping mechanism is locked. S3. Based on the working condition feature vector, control target and core material parameters, the adjustment instruction set is generated using the fuzzy rules of T3-FLC. The adjustment instruction set includes the spacing adjustment instruction, the feed speed adjustment instruction and the electric spindle adjustment instruction. Step S3 specifically includes the following steps: S31, Based on control objectives and core material parameters Obtain the reference for coordinated control of dual-station spacing, feed speed, and electric spindle. ,in, These represent the core target spacing, target feed rate, target rotation speed, and target power, respectively. These represent the spacing reference, feed rate reference, electric spindle speed reference, and electric spindle power reference, respectively. , , , , Indicates the strength correction factor. Indicates the reference compressive strength. Indicates the wear resistance correction factor. Indicates the strength coupling coefficient; S32, Based on spacing reference and current spacing measurement value Generate spacing adjustment commands and feed rate adjustment commands: ; in, ; ; ; ; ; ; ; ; ; ; ; ; ; In the formula, This indicates the final adjustment instruction. , These represent the pitch and feed rate, respectively. and These represent the upper and lower limits of the adjustment command, respectively; Indicates the original adjustment command; and These represent the maximum and minimum reference values ​​of the original adjustment command, respectively. This indicates a Type-3 fuzzy logic controller. Selecting the membership function, Select the membership function to trigger the strength column vector; This indicates a Type-3 fuzzy logic controller. Select the lower membership function, Select the lower membership function to trigger the strength column vector; This indicates a Type-3 fuzzy logic controller. Selecting the membership function, Select the lower membership function to trigger the strength column vector; This indicates a Type-3 fuzzy logic controller. Select the lower membership function, Select the membership function to trigger the strength column vector; Indicates the transpose operation; and Let them represent the summation terms of the upper type and the lower type, respectively; , , and They represent , , and The corresponding consequent parameter vector; Indicates the rule index; Indicates the total number of rules; Indicates the deviation of the adjusted object after the current correction. With the The rule adjusts the maximum degree of matching of the fuzzy description of the deviation of the object, where the object is either the spacing or the feed. Indicates the rate of change of the current adjustment object. With the The maximum degree of matching for the fuzzy description of the rate of change of rule deviation; Indicates the deviation of the adjusted object after the current correction. With the The minimum degree of matching in the fuzzy description of spacing deviation in the rule; Indicates the rate of change of the current adjustment object. With the The minimum degree of matching for a fuzzy description of the rate of change of rule deviation; and These represent the membership functions; This represents the input variables in the ype-3 fuzzy logic controller; This represents the center value of the membership function of the Type-3 fuzzy logic controller; Indicates the membership function exponent of the Type-3 fuzzy logic controller; and These represent the left and right extensions of the membership function of the Type-3 fuzzy logic controller, respectively. Indicates the absolute deviation of the object being adjusted; This indicates the target adjustment object after the correction; This indicates the rate of change of the deviation of the controlled object; and They represent the first The second sampling and the first The absolute deviation of the adjustment object in the next sampling; Indicates the sampling period; This represents the correction factor for the uniaxial compressive strength of rock; express; This represents the correction factor for rock abrasion resistance; This indicates the pure deviation of the feed rate, and , and These represent the collaborative reference and the current feed rate measurements, respectively. This indicates the pitch-feed coupling deviation, and , Indicates the coefficient of synergy; S33. Considering temperature and wear, based on the spacing adjustment command. and feed rate adjustment commands Generate electric spindle adjustment commands : ; ; in, ; In the formula, and These represent the electric spindle speed adjustment command and the power adjustment command, respectively. This indicates the speed-feed-pitch linkage correction coefficient; Indicates the temperature compensation coefficient; This indicates the actual temperature of the electric spindle housing; Indicates the upper limit of temperature; Indicates the reference temperature; Indicates the wear compensation coefficient; and These represent the power reference value and the speed reference value, respectively. and These represent the feed-speed matching coefficient and the pitch-speed matching coefficient, respectively. S34, respectively adjust the spacing commands Feed rate adjustment command and electric spindle adjustment commands By performing instruction correction and smooth instruction transition, the final coordinated adjustment instruction set is obtained. ; The instruction correction formula is as follows: ; ; In the formula, This indicates the revised adjustment instructions. , These represent the pitch, feed rate, electric spindle speed, and electric spindle power, respectively. Indicates the instruction correction factor, and when Time-triggered correction; Indicates the upper limit of the spacing adjustment command; Indicates the upper limit of the feed rate adjustment command; Indicates the upper limit of the electric spindle power adjustment command; The formula for smooth instruction transition is as follows: ； In the formula, This indicates an adjustment command after a smooth transition. This indicates the adjustment command from the previous moment; This represents the smoothing coefficient.

[0023] In step S3, the membership function expansion is dynamically adjusted by combining the core positioning characteristics. When the positioning deviation is large, the adjustment response speed is improved, and when the deviation is small, the adjustment accuracy is improved. At the same time, the electric spindle speed and power command are optimized based on the ANFIS model to realize dual-station collaborative control.

[0024] S4. Output the spacing adjustment command, feed speed adjustment command, and electric spindle adjustment command to the spacing adjustment motor, feed motor, and electric spindle respectively to execute the sample preparation action.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A lightweight double station cut-off machine comprising a worktable, characterized in that: The top end of the workbench is provided with an adjustable interval double-station cutting and grinding mechanism, a core clamping mechanism, a feeding mechanism, a control mechanism integrated with a Type-3 fuzzy logic controller and a multi-source sensing mechanism, the core clamping mechanism is arranged on the feeding mechanism, and the feeding mechanism is used to drive the core clamping mechanism to move towards or away from the double-station cutting and grinding mechanism to realize feeding; The multi-source sensing mechanism includes a first current sensor, a second current sensor, an NTC temperature sensor, a three-axis vibration sensor, a pressure sensor and an industrial camera which are respectively used to collect the motor current, the feeding current, the working condition temperature, the vibration signal, the core clamping force and the core positioning image, the multi-source sensing mechanism is electrically connected with the input end of the control mechanism, the output end of the control mechanism is electrically connected with the double-station cutting and grinding mechanism and the feeding mechanism respectively, and the control mechanism is used to realize adaptive core sampling.

2. A light-weight double-station cutting mill according to claim 1, characterized in that: The double-station cutting and grinding mechanism includes two groups of cutting and grinding units and an interval adjusting unit, the interval adjusting unit includes a forward and reverse thread lead screw arranged at the top end of the workbench through a fixed seat, the two ends of the forward and reverse thread lead screw are vertically rotatably connected with the two fixed seats respectively, one end of the forward and reverse thread lead screw is fixedly connected with an interval adjusting motor fixed on the fixed seat, the forward and reverse thread lead screws are respectively threadedly connected with a forward nut and a reverse nut, and the forward nut and the reverse nut are connected with the two groups of cutting and grinding units through sliding seats respectively, so as to adjust the interval of the two groups of cutting and grinding units; Each of the two groups of cutting and grinding units includes an electric spindle fixedly connected with the sliding seat, and the output end of the electric spindle is detachably fixed with a cutter head or a grinding wheel.

3. A light weight double station cutting mill as claimed in claim 2, wherein: The feeding mechanism includes an L-shaped fixed plate fixed at the top end of the workbench, a lead screw penetrating through the L-shaped fixed plate, a feeding motor fixed on the L-shaped fixed plate and fixedly connected with one end of the lead screw, and a feeding nut threadedly connected with the lead screw, the feeding nut is fixed at the top end of a sliding base, the top end of the sliding base is further fixed with the core clamping mechanism, and the bottom end of the sliding base is slidably connected with a sliding rail fixed on the workbench; The movement direction of the feeding nut and the direction of the sliding rail are both perpendicular to the connecting line between the two groups of cutting and grinding units.

4. The lightweight double station cut-off machine of claim 3, wherein: The core clamping mechanism includes a lower clamping block fixed on the L-shaped fixed plate and an upper clamping block arranged directly above the lower clamping block, a clamping channel is formed between the upper clamping block and the lower clamping block, and a core is clamped in the clamping channel; The upper clamping block and the lower clamping block are fixed through fastening bolts.

5. A method of operating a lightweight double station cut-off mill as claimed in claim 4 wherein: The first current sensor is connected in series in the power supply circuit of the electric spindle, the second current sensor is connected in series in the power supply circuit of the feeding motor, the NTC temperature sensor is attached to the electric spindle housing, the three-axis vibration sensor is installed on the sliding seat, the pressure sensor is arranged on the side of the lower clamping block facing the upper clamping block, and the industrial camera is arranged directly above the core clamping mechanism; The multi-source sensing mechanism further includes a laser interferometer for collecting the lead of the lead screw; The workbench, the fixed seat, the sliding seat, the sliding base, the L-shaped fixed plate are all made of 6061-T6 aluminum alloy material; the cutter head and the grinding wheel are made of 7075 aluminum alloy honeycomb structure, and the surface of the 7075 aluminum alloy honeycomb structure is sequentially deposited with a 5 μm thick Ti transition layer and a 15 μm-20 μm thick MoS2-TiAlN composite coating.

6. A method of operating a lightweight double station cut-off mill as claimed in claim 5, characterized in that: The method comprises the following steps: S1, based on the design parameters of the double-station cutting mill, the target size of the core and the core material parameters, calibrate the mechanical parameters, preset the control parameters and safety thresholds, and calibrate the multi-source sensing mechanism; S2, remove the upper clamp block, place the core in the clamping channel, reassemble the upper clamp block, turn on the electric spindle, spacing adjustment motor and feeding motor until the cutter or grinding wheel contacts the surface of the core; At this time, the running state data of the double-station cutting mill is synchronously collected through the multi-source sensing mechanism, and after preprocessing, the feature fusion is performed through the ACI-GNN model to obtain the working condition feature vector; S3, based on the working condition feature vector, the control target and the core material parameters, the fuzzy rule of T3-FLC is used to generate the adjustment instruction set, which includes spacing adjustment instruction, feeding speed adjustment instruction and electric spindle adjustment instruction; S4, output the spacing adjustment instruction, the feeding speed adjustment instruction and the electric spindle adjustment instruction to the spacing adjustment motor, the feeding motor and the electric spindle respectively, and execute the sample preparation action.

7. The working method of a light-weight double-station cutting mill according to claim 6, characterized in that: the calibrated mechanical parameters in step S1 , respectively represent the calibrated initial distance of the two sets of cutting grinding units, the rated power and rotating speed of the electric spindle, the clamping range of the core clamping mechanism, and the feeding parameters, and , respectively represent the minimum clamping diameter and the maximum clamping diameter of the calibrated core clamping mechanism; , respectively represent the lead of the screw rod, the rated rotating speed of the feeding motor, and the feeding speed reference value, , represents the maximum feeding speed, and both represent the material correction coefficient, represents the uniaxial compressive strength of the core, represents the wear resistance index of the core; Control parameters , respectively represent Type-3 fuzzy logic controller membership function parameters, adaptive neuro-fuzzy inference system rule parameters, and error compensation coefficients, and , respectively represent Type-3 fuzzy logic controller middle distance deviation, distance deviation change amount, and output quantization coefficient, , respectively represent motor spindle stator d-axis voltage, q-axis voltage, d-axis current, and q-axis current; Safety threshold , respectively denote an electric spindle temperature threshold, an electric spindle current threshold, a vibration acceleration threshold and a clamping force current threshold.

8. The working method of a light-weight double-station cutting mill according to claim 7, characterized in that: The operation state data of the double-station cutting mill in step S2 includes motor shaft current, temperature, feeding current, three-axis vibration acceleration, clamping force current, and core clamping image; and the obtained working condition feature vector ; wherein, respectively represent the electrical spindle load characteristic, the temperature characteristic, the vibration characteristic, the core positioning characteristic, the cutting and grinding assembly wear characteristic and the feed characteristic.

9. The working method of a light-weight double-station cutting mill according to claim 8, characterized in that: Step S3 specifically includes the following steps: S31、based on the control target and core material parameters , obtain duplex station spacing-feeding speed-electric spindle collaborative control reference wherein, respectively represent core target spacing, target feeding speed, target rotating speed and target power; respectively represent spacing reference, feeding speed reference, electric spindle rotating speed reference and electric spindle power reference, and , , , , represent a strength correction coefficient, represent a reference compressive strength, represent a wear resistance correction coefficient, represent a strength coupling coefficient; S32, based on the spacing reference and the current spacing measurement generate spacing adjustment instructions and feed speed adjustment instructions: ； Wherein, ； ； ； ； ； ； ； ； ； ； ； ； ； In the formula, This indicates the final adjustment instruction. , These represent the pitch and feed rate, respectively. and These represent the upper and lower limits of the adjustment command, respectively; Indicates the original adjustment command; and These represent the maximum and minimum reference values ​​of the original adjustment command, respectively. This indicates a Type-3 fuzzy logic controller. Selecting the membership function, Select the membership function to trigger the strength column vector; This indicates a Type-3 fuzzy logic controller. Select the lower membership function, Select the lower membership function to trigger the strength column vector; This indicates a Type-3 fuzzy logic controller. Selecting the membership function, Select the lower membership function to trigger the strength column vector; This indicates a Type-3 fuzzy logic controller. Select the lower membership function, Select the membership function to trigger the strength column vector; Indicates the transpose operation; and Let them represent the summation terms of the upper type and the lower type, respectively; , , and They represent , , and The corresponding consequent parameter vector; Indicates the rule index; Indicates the total number of rules; Indicates the deviation of the adjusted object after the current correction. With the The rule adjusts the maximum degree of matching of the fuzzy description of the deviation of the object, where the object is either the spacing or the feed. Indicates the rate of change of the current adjustment object. With the The maximum degree of matching for the fuzzy description of the rate of change of rule deviation; Indicates the deviation of the adjusted object after the current correction. With the The minimum degree of matching in the fuzzy description of spacing deviation in the rule; Indicates the rate of change of the current adjustment object. with the first the minimum matching degree of the fuzzy description of the rule deviation change rate; and respectively represent the upper membership function; represents the input variable in the Type-3 fuzzy logic controller; represents the membership function center value of the Type-3 fuzzy logic controller; represents the membership function index of the Type-3 fuzzy logic controller; and respectively represent the left and right extension degrees of the membership function of the Type-3 fuzzy logic controller; represents the absolute deviation of the regulated object; represents the corrected target regulated object; represents the deviation change rate of the regulated object; and respectively represent the absolute deviation of the regulated object at the first sampling and the first sampling; represents the sampling period; represents the correction coefficient of the uniaxial compressive strength of the rock; represents; represents the correction coefficient of the wear resistance of the rock; represents the pure deviation of the feed speed, and , and respectively represent the cooperative reference and the current feed speed measurement value; represents the pitch-feed coupling deviation, and , represents the cooperative coefficient; S33, considering temperature and wear, generating spacing adjustment instruction and feed speed adjustment instruction , generating electric spindle adjustment instruction : ； ； Wherein, ； In the formula, and respectively represent the electric spindle rotation speed adjustment instruction and the power adjustment instruction; represents the rotation speed-feed-distance linkage correction coefficient; represents the temperature compensation coefficient; represents the actual temperature of the electric spindle housing; represents the upper limit of the temperature; represents the reference temperature; represents the wear compensation coefficient; and respectively represent the power reference value and the rotation speed reference value; and respectively represent the feed-rotation speed matching coefficient and the distance-rotation speed matching coefficient; S34, respectively, spacing adjustment instructions , feed speed adjustment instructions and spindle adjustment instructions perform instruction correction and instruction smooth transition to obtain a final set of coordinated adjustment instructions ; Wherein, the instruction correction formula is as follows: ； ； wherein represents the modified adjustment command, , respectively represent the pitch, the feed speed, the electric spindle rotational speed and the electric spindle power; represents the command correction coefficient, and when the correction is triggered; represents the pitch adjustment command upper limit; represents the feed speed adjustment command upper limit; represents the electric spindle power adjustment command upper limit; The instruction smoothing transition processing formula is as follows: ； In the formula, represents the adjustment command after the smoothing transition process; represents the adjustment command at the previous time; represents the smoothing coefficient.

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