A device for grinding the inner wall of a projectile packaging tube

Abstract

This invention belongs to the technical field of grinding devices, specifically a grinding device for the inner wall of a projectile packaging cylinder. It includes a grinding head assembly, an airflow pressure sensing assembly, a differential spiral compensation mechanism, a power unit, and a position preset module. The airflow pressure sensing assembly detects the original airflow pressure signal corresponding to the grinding gap. The position preset module identifies the cylinder section category where the grinding head is located. The device also includes a curved surface airflow correction module and a real-time gap calibration sensing unit. This invention, by setting up a curved surface airflow correction module, calls corresponding coefficients to correct the airflow signal according to the cylinder section, accurately filtering out gap interference caused by curved surface contact. Combined with the real-time gap calibration sensing unit, it detects the actual gap in real time and generates calibration commands, thus solving the core problems of detection distortion and error accumulation in existing curved surface grinding methods.

Description

Technical Field

[0001] This invention belongs to the field of polishing device technology, specifically a polishing device for the inner wall of a projectile packaging cylinder. Background Technology

[0002] As a key carrier of core equipment for storage and transportation, the surface finish, dimensional consistency and shape accuracy of the inner wall of the projectile packaging tube directly affect the assembly quality and long-term storage reliability. Traditional manual grinding methods are inefficient and of unstable quality, and have been gradually replaced by automated CNC grinding equipment. Existing automated grinding technology mainly revolves around two core issues: real-time compensation for grinding wheel wear and precise fitting of complex inner wall surfaces.

[0003] Currently, the technical solutions for grinding the inner wall of cylinders in the industry are mainly divided into two categories:

[0004] Grinding wheel wear compensation technology: This technology uses an airflow pressure sensor to detect changes in the gap between the grinding wheel and the cylinder wall, indirectly identifying the amount of grinding wheel wear. A differential screw mechanism drives the feed compensation to ensure a constant grinding gap. The core of this technology is to solve the problem of increased gap caused by grinding wheel wear. However, it is only suitable for grinding straight sections. When grinding curved surfaces (arcs / cones), the gap fluctuations caused by the contact of the curved surface will be misjudged by the airflow sensor as grinding wheel wear, leading to compensation distortion (incorrect compensation when it should be compensated, or inappropriate compensation when it should be compensated). It cannot be adapted to complex cylinder structures.

[0005] Curved surface fitting grinding technology: By pre-setting the axial position of the cylindrical structure segment and combining it with the displacement sensor to identify the straight / curved segment, the grinding head is driven to move forward and backward to fit the curved surface contour. The core of this technology is to solve the problem of curved surface fitting grinding, but it does not consider the wear factor of the grinding wheel and can only achieve curved surface grinding with a fixed contour. When the grinding wheel wears multiple times, problems such as decreased curved surface fitting accuracy and under-grinding across the entire area will occur.

[0006] In summary, each of the existing technologies has limitations when used alone. However, when the grinding wheel wear compensation technology and the curved surface adaptation grinding technology are used in combination, a key problem arises that is difficult for the existing technologies to solve on their own, becoming the core bottleneck restricting the grinding accuracy of the projectile packaging cylinder:

[0007] 1. During curved surface grinding, the dynamic gap fluctuations formed by the contact between the grinding wheel and the curved surface are superimposed with the interference of the grinding airflow field. In the existing technology, the airflow sensor can only detect the total gap change and cannot separate the gap changes caused by two different reasons: grinding wheel wear and curved surface contact. This leads to a mismatch between the compensation command and the actual needs, which in turn causes a deviation in grinding accuracy.

[0008] 2. Existing calibration mechanisms are mostly periodic offline calibration or static calibration after single compensation. They cannot adapt to dynamic grinding scenarios with continuous compensation for multiple wears of grinding wheels and superimposed compensation for curved surfaces. Small deviations in a single compensation accumulate continuously with the grinding process, eventually causing over-grinding of the curved surface. The accumulated error is large and it is difficult to meet the requirements of high-precision grinding.

[0009] Therefore, the present invention provides a device for grinding the inner wall of a projectile packaging cylinder. Summary of the Invention

[0010] To overcome the shortcomings of existing technologies and solve the problems of distortion in surface grinding detection and excessive cumulative error in existing grinding technologies, high-precision full-area grinding can be achieved.

[0011] The technical solution adopted by the present invention to solve its technical problem is: the inner wall grinding device of the projectile packaging cylinder of the present invention includes a grinding head assembly, an airflow pressure sensing assembly, a differential spiral compensation mechanism, a power unit and a position preset module;

[0012] The airflow pressure sensing component is used to detect the original airflow pressure signal corresponding to the grinding gap;

[0013] The position preset module is used to identify the category of the cylinder section where the grinding head is located;

[0014] The device is also equipped with a curved airflow correction module and a real-time gap calibration sensing unit;

[0015] The curved surface airflow correction module is electrically connected to the position preset module and the airflow pressure sensing component, respectively. It is used to call the corresponding correction coefficient to correct the original airflow pressure signal according to the segment category identified by the position preset module, so as to filter out the gap change component caused by the curved surface fitting, and generate the wear real-time compensation amount accordingly.

[0016] The position preset module is also used to generate surface adaptation adjustment amount based on preset path information;

[0017] The real-time gap calibration sensing unit is coaxially mounted on the grinding head assembly and is used to detect the actual grinding gap in real time.

[0018] The power unit is connected to the curved surface airflow correction module, the position preset module, and the real-time gap calibration sensing unit. It is used to receive the real-time wear compensation amount, the curved surface adaptation adjustment amount, and the calibration command generated based on the actual grinding gap, and drive the differential spiral compensation mechanism to perform the corresponding compensation action.

[0019] Furthermore, the response time for the correction coefficient is ≤0.01s, and the compensation amount is superimposed using a linear weighted algorithm, with the weights dynamically adjustable.

[0020] Preferably, the correction coefficient corresponds to the segment category, including a straight segment coefficient for straight segments, a circular arc coefficient for circular arc segments, and a conical coefficient for conical segments.

[0021] Furthermore, the correction coefficients are calibrated through orthogonal experiments and stored in the built-in Flash unit, supporting online updates via USB interface.

[0022] Preferably, the arc coefficient is less than 1.0, the taper coefficient is greater than 1.0, and the transition region between the straight segment and the curved segment adopts a linear gradient correction coefficient.

[0023] Furthermore, the length of the transition area is 80mm by default, the gradient step size is ≤0.01, and the grinding feed speed is synchronously matched.

[0024] Preferably, the grinding head assembly is a segmented stepped grinding wheel, the airflow pressure sensing assembly is provided with a multi-channel detection end, and the curved surface airflow correction module independently corrects the original airflow pressure signal of each channel.

[0025] Furthermore, the number of detection ends corresponds one-to-one with the grinding wheel sections, with a spacing of 50mm, and each channel is equipped with an independent amplification and filtering unit.

[0026] Preferably, the real-time gap calibration sensing unit is a non-contact displacement sensor with a detection accuracy of not less than ±0.001mm;

[0027] The real-time gap calibration sensing unit is configured to: preset a reference grinding gap, and generate a calibration command when the absolute value of the deviation between the detected actual grinding gap and the reference grinding gap exceeds 0.003mm.

[0028] Furthermore, the reference gap is set within the range of 1-3mm, the detection frequency is 200Hz, and the calibration command is executed with interrupt priority.

[0029] Preferably, the airflow pressure sensing component is provided with an annular negative pressure guide shroud, which is connected to a negative pressure generating device to form a stable flow field in the detection area and discharge grinding debris.

[0030] Furthermore, the inner diameter of the flow guide is 8mm larger than the outer diameter of the detection end, and the inner wall is provided with 3 spiral flow guide grooves with a negative pressure value of 0.05-0.15MPa.

[0031] Preferably, a buffer structure is provided between the grinding head assembly and the differential spiral compensation mechanism. The buffer structure integrates a force sensor to detect axial grinding resistance. When the grinding resistance exceeds a preset threshold, the power unit will reduce the grinding pressure in conjunction.

[0032] Furthermore, the buffer structure uses a group of 4 disc springs with a stroke of 3mm, a force sensor accuracy of ±1N, a preset threshold of 60-90N, and a pressure reduction of 20%.

[0033] Preferably, it also includes a grinding wheel wear prediction module, which is connected to the curved surface airflow correction module and the position preset module respectively, and is used to output a feedforward compensation signal to the power unit based on historical wear data and the grinding path.

[0034] Furthermore, the grinding wheel wear prediction module incorporates an LSTM neural network model, trained based on ≥100 sets of historical data, with a feedforward compensation amount of 0.005-0.01mm.

[0035] Preferably, it also includes a quality inspection unit integrated into the grinding head assembly for online detection of the surface roughness of the inner wall after grinding; the power unit dynamically adjusts the grinding process parameters according to the surface roughness.

[0036] Furthermore, the quality detection unit is a laser roughness meter with an accuracy of Ra 0.01 μm and a distance of 100 mm between the detection point and the grinding point. If the accuracy is exceeded, the feed speed or rotation speed is adjusted.

[0037] Preferably, the device is suitable for grinding the inner wall of a military-grade alloy steel projectile packaging tube with a specification of φ800mm×6m, and the fluctuation of the grinding gap is controlled within a range of no more than 0.01mm throughout the grinding process.

[0038] The beneficial effects of this invention are as follows:

[0039] 1. The inner wall grinding device of the projectile packaging cylinder described in this invention accurately solves the problem of distortion in curved surface grinding detection. By outputting the adaptation coefficient through the curved surface airflow correction module, it eliminates the interference of gap fluctuation caused by curved surface fitting, accurately distinguishes the gap change caused by grinding wheel wear and curved surface fitting, avoids compensation command confusion, and ensures grinding accuracy.

[0040] 2. The projectile packaging cylinder inner wall grinding device of the present invention effectively eliminates the cumulative error of superimposed compensation, relies on the real-time gap calibration sensing unit to detect the grinding gap in real time, and finely adjusts the feed amount after superimposed compensation in a closed loop to prevent the continuous accumulation of small deviations and meet the gap fluctuation requirements of military industry.

[0041] 3. The projectile packaging cylinder inner wall grinding device of the present invention constructs a correction-calibration-compensation closed-loop system, linking existing wear compensation and surface compensation functions, without the need for additional complex operations, to achieve precise adaptation of the straight and curved sections across the entire range, thereby improving grinding stability and efficiency. Attached Figure Description

[0042] The invention will now be further described with reference to the accompanying drawings.

[0043] Figure 1 This is a simplified structural diagram of the device of the present invention;

[0044] Figure 2 This is a flowchart of the multi-module signal connection and processing in this invention;

[0045] Figure 3 This is a flowchart of curved surface airflow correction and gap control. Detailed Implementation

[0046] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0047] Example 1

[0048] The core of the projectile packaging cylinder inner wall grinding device in this embodiment of the invention lies in the construction of a closed-loop control system of "correction-calibration-compensation" to solve the problems of distortion and error accumulation in the existing surface grinding detection.

[0049] 1. Specific implementation of the core module

[0050] (1) Grinding head assembly: This assembly is the end effector that performs the grinding operation.

[0051] In this embodiment, the grinding head assembly specifically includes a segmented stepped grinding wheel; the grinding wheel is formed by stacking multiple grinding wheel blades of different diameters along the axial direction, for example, a three-section design can be adopted to adapt to the grinding needs of different sections of the cylinder; the grinding wheel is driven by a high-precision electric spindle, which integrates an encoder for precisely controlling the grinding wheel speed.

[0052] (2) Airflow pressure sensing component: This component is used to detect the gap between the grinding wheel and the cylinder wall.

[0053] Specifically, it consists of one or more pneumatic probes; each probe includes a precision nozzle and a pressure sensor; high-pressure gas is sprayed onto the cylinder wall through the nozzle, and the back pressure signal is detected by the pressure sensor and converted into an electrical signal; this signal is inversely proportional to the gap, that is, the larger the gap, the smaller the back pressure; in this embodiment, the airflow pressure sensing component is surrounded by an annular negative pressure guide shroud; the guide shroud is connected to a vacuum generator (negative pressure generating device), the function of which is to form a stable negative pressure flow field around the probe, on the one hand to suck away the dust generated by grinding, and on the other hand to suppress airflow turbulence and ensure the stability of the detection signal.

[0054] (3) Differential screw compensation mechanism: This mechanism is an actuator that realizes micron-level feed compensation; it is usually composed of a set of precision ball screw pairs or planetary roller screw pairs and driven by a servo motor or stepper motor; the mechanism is installed on the feed path of the grinding head assembly and can receive instructions from the control system to drive the grinding head assembly to make precise axial displacement in order to compensate for grinding wheel wear.

[0055] (4) Power unit: This unit is the core of the system's drive and control; it is usually a multi-axis motion control card or PLC (programmable logic controller), which integrates a high-performance processor and motion control algorithm; the power unit receives instruction signals from various sensors and modules, and after processing, outputs control signals to the servo driver, thereby precisely controlling the movement of the differential spiral compensation mechanism and the grinding head spindle.

[0056] (5) Position preset module: This module is used to identify the current position of the grinding head in the cylinder; it is usually implemented by a high-precision grating ruler or rotary encoder and the preset machining program (G code) in the CNC system; by reading the feedback value of the grating ruler and combining it with the preset workpiece three-dimensional model, the system can determine in real time whether the grinding head is currently in the straight section, the arc section or the conical section of the cylinder.

[0057] (6) Curved surface airflow correction module: This module is the core algorithm unit for solving signal interference; it can be an embedded software program running inside the power unit (PLC / control card); this module has a built-in "position-correction coefficient" mapping table; for example, when the position preset module recognizes that it is currently in a circular arc segment, this module will call a correction coefficient less than 1.0 (such as 0.8); when it is in a conical segment, it will call a correction coefficient greater than 1.0 (such as 1.2).

[0058] The definition of the "position-correction coefficient" mapping table is shown in the following example:

[0059] Section Category Correction factor (K) illustrate straight segment 1.0 As a benchmark coefficient Circular arc segment 0.8 (less than 1.0) Used to correct for an overestimation of the original signal caused by airflow convergence. Conical segment 1.2 (greater than 1.0) Used to correct for underestimation of the original signal due to airflow diffusion effects. Transition area Linear gradient In the region where straight and curved segments connect, the coefficients gradually change linearly between the coefficients of the corresponding segments.

[0060] Correction Algorithm: The correction algorithm of the curved surface airflow correction module is as follows:

[0061] 1. Signal Acquisition: Read the raw airflow pressure signal P output by the airflow pressure sensing component. raw ;

[0062] 2. Location Recognition: Receives the current segment category (straight segment, arc segment, conical segment) provided by the location preset module;

[0063] 3. Coefficient Retrieval: Based on the current segment category, retrieve the corresponding correction coefficient K from the built-in "Location-Correction Coefficient" mapping table;

[0064] 4. Signal Correction: Correct the original airflow pressure signal P raw The corrected airflow pressure signal P is obtained by multiplying it with the correction factor K. corrected =P raw ×K;

[0065] 5. Compensation Calculation: Based on the corrected signal P corrected Compared with the preset reference pressure value P base The difference is used to calculate the real-time wear compensation amount through a preset "pressure-gap-compensation amount" mapping relationship.

[0066] Real-time gap calibration sensing unit: This unit is used to eliminate accumulated errors; it typically employs a non-contact displacement sensor, such as a laser displacement sensor or an eddy current displacement sensor. This sensor is coaxially mounted on the grinding head assembly and directly measures the actual physical gap between the grinding wheel end face and the cylinder wall. Its detection accuracy is extremely high, typically not less than ±0.001mm. The sensor compares the detected actual gap with a system-preset reference gap (e.g., 2.0mm). When the deviation exceeds a small threshold (e.g., 0.003mm), a calibration command is generated to fine-tune the final feed amount of the differential screw compensation mechanism.

[0067] 2. Work Process

[0068] System initialization: The equipment starts up, the workpiece processing program is loaded, and each sensor performs self-test and calibration.

[0069] Position recognition and signal acquisition: The grinding head is fed along the cylinder axis; the position preset module identifies the current section (straight section / curved section) in real time; at the same time, the airflow pressure sensor component detects the original airflow pressure signal, and the real-time gap calibration sensor unit detects the actual grinding gap.

[0070] Signal correction and instruction generation:

[0071] Wear compensation amount: The curved airflow correction module calls the corresponding correction coefficient according to the current section to correct the original airflow pressure signal, calculate the actual wear amount of the grinding wheel, and generate the real-time wear compensation amount.

[0072] Surface adaptation adjustment amount: The position preset module generates a surface adaptation adjustment amount to make the grinding wheel fit the surface based on the preset path information.

[0073] Calibration command: The real-time gap calibration sensing unit compares the actual gap with the reference gap. If the deviation exceeds the limit, a calibration command is generated.

[0074] Composite compensation execution: The power unit receives the above three commands (wear compensation amount, surface adaptation adjustment amount, and calibration command), superimposes them to obtain a final composite feed amount; then, the power unit drives the differential spiral compensation mechanism to execute the feed amount, ensuring that the grinding head always grinds with the correct posture and gap.

[0075] Example 2

[0076] This embodiment illustrates the determination and implementation of the correction coefficient.

[0077] 1. Calibration of Coefficients: The correction coefficients (straight section coefficient, circular arc coefficient, and conical coefficient) are calibrated using an orthogonal experimental method. Specifically, a standard sample is used, and grinding tests are performed on the straight section, circular arc section, and conical section respectively. The signal value of the airflow pressure sensor under ideal fit conditions (i.e., no wear on the grinding wheel, only changes due to geometric shape) is recorded. The ratio of this signal value to the reference signal value for the straight section is used as the correction coefficient for that section. For example, in the circular arc section, due to the airflow convergence effect, the signal value may be 25% higher than in the straight section; therefore, the correction coefficient can be calibrated as 1 / 1.25 = 0.8.

[0078] 2. Coefficient Storage and Retrieval: The calibrated coefficients are stored in the built-in Flash memory of the power unit, forming a "position-coefficient" lookup table. During processing, the curved surface airflow correction module quickly retrieves the corresponding coefficients using the lookup table method based on the real-time position information provided by the position preset module. The system supports online updates of the coefficient table via USB or Ethernet interface to adapt to workpieces of different specifications.

[0079] 3. Handling of the transition zone: In the transition zone between straight and curved sections (such as a buffer zone of 80mm in length), the system uses a linear interpolation algorithm to achieve a smooth transition of coefficients. For example, the transition from a straight section coefficient of 1.0 to a circular arc coefficient of 0.8 can be achieved by setting the transition step size to 0.01 to ensure a smooth transition of the compensation amount and avoid equipment vibration or processing defects caused by abrupt changes in coefficients.

[0080] Example 3

[0081] This embodiment illustrates the implementation of a segmented stepped grinding wheel and multi-channel detection.

[0082] 1. The segmented stepped grinding wheel adopts a three-section design, corresponding to the inlet section, middle section, and outlet section of the cylinder. Correspondingly, the airflow pressure sensing component has three independent detection channels, each corresponding to one grinding wheel section, with a detection end spacing of approximately 50mm. Each channel is equipped with an independent signal amplifier and high-pass filter to eliminate low-frequency vibration interference.

[0083] 2. The curved surface airflow correction module maintains an independent correction coefficient table for each channel at the software level. During processing, it processes the signals from the three channels in parallel, corrects them independently, and generates three independent wear compensation values. The system ultimately selects the maximum value among the three compensation values ​​(i.e., the section with the most severe wear) as the final real-time wear compensation value to ensure that all sections are sufficiently polished.

[0084] Example 4

[0085] This embodiment illustrates the implementation of the buffer structure and force sensor.

[0086] 1. Mechanical Structure: The buffer structure specifically employs a group of four mating disc springs, installed between the grinding head assembly and the differential spiral compensation mechanism. This structure has a compression stroke of approximately 3mm, effectively absorbing instantaneous impacts caused by workpiece roundness errors or abrupt changes in curvature.

[0087] 2. Force Detection and Protection: A strain gauge force sensor with an accuracy of ±1N is integrated into the buffer structure. This sensor detects axial grinding resistance in real time. The system has a preset safety threshold, such as 60N. When the detected resistance exceeds this threshold (which may indicate a collision or hard spot), the power unit will immediately execute protective actions, such as reducing the grinding pressure by 20% or pausing the feed until the resistance returns to normal before resuming processing, thereby protecting the equipment and the workpiece.

[0088] Example 5

[0089] This embodiment illustrates the implementation of the grinding wheel wear prediction module and the quality inspection unit.

[0090] 1. Grinding Wheel Wear Prediction Module: This module is a prediction algorithm running inside the power unit. It is based on an LSTM (Long Short-Term Memory) neural network model, which is trained using over 100 sets of historical grinding data (including grinding path, material, and final wear amount). Before processing, this module predicts the possible wear amount of the grinding wheel in the next stage based on the grinding path and outputs a feedforward compensation signal (e.g., 0.005mm) to the power unit to achieve "pre-compensation" and reduce the lag of real-time compensation.

[0091] 2. Quality Inspection Unit: This unit is specifically a laser scattering roughness meter, integrated approximately 100mm behind the grinding head assembly. It monitors the surface roughness (Ra value) of the inner wall in real time after grinding. If the roughness exceeds the standard, the power unit dynamically adjusts the grinding process parameters, such as reducing the axial feed speed or increasing the grinding wheel speed, to improve surface quality, achieving a closed loop from "dimensional control" to "quality control".

[0092] Example 6

[0093] This embodiment verifies the technical effect of the device described in this invention compared with existing technologies (which only use airflow pressure compensation or only use curved surface adaptation grinding) through comparative experiments.

[0094] 1. Test conditions

[0095] Test subject: φ800mm×6m military-grade alloy steel projectile packaging tube (material 30CrMnSiA).

[0096] Test equipment:

[0097] The device of the present invention adopts the technical solutions of Embodiments 1 to 5.

[0098] Comparison device A (existing technology): It only uses airflow pressure compensation technology, without a curved airflow correction module and a real-time gap calibration sensing unit.

[0099] Comparison device B (existing technology): It only uses surface adaptation grinding technology and has no real-time compensation function for grinding wheel wear.

[0100] Evaluation indicators: overall grinding gap fluctuation (mm), inner wall surface roughness (Ra, μm), and grinding time for a single cylinder (min).

[0101] 2. Test Results

[0102] Test Project The device of the present invention Comparison device A Comparison device B Fluctuations in the gaps throughout the polishing process ≤ 0.008mm 0.05 - 0.12mm 0.15 - 0.25mm Inner wall surface roughness (Ra) 0.4 - 0.8μm 0.8 - 1.5μm 1.2 - 2.0μm Grinding time for a single cylinder ≤ 120 min 150 min 180 min

[0103] 3. Experimental Conclusions

[0104] Gap control: The device of this invention accurately filters out signal interference caused by curved surface bonding through the "curved surface airflow correction module" and eliminates cumulative errors through the "real-time gap calibration sensing unit", strictly controlling gap fluctuation within 0.01mm, which is far superior to the comparative device.

[0105] Surface quality: Due to the stable gap control, the inner wall surface polished by the device of the present invention has better roughness and better consistency.

[0106] Processing efficiency: The device of this invention achieves fully automated and high-precision grinding without manual intervention or rework, which significantly improves processing efficiency.

[0107] 4. Conclusion: The experimental data fully demonstrates that the device described in this invention effectively solves the problems of distortion and error accumulation in the detection of curved surface grinding in the prior art, and achieves unexpected technical results.

[0108] In light of current practical needs, the above-described embodiments of this invention are not limited to these specific implementations. Various modifications made within the scope of knowledge of those skilled in the art, without departing from the inventive concept—such as using more monitoring points, employing online particle size analyzers based on different principles, applying other types of predictive control algorithms or self-cleaning methods—still fall within the protection scope of this invention.

Claims

1. A device for grinding the inner wall of a projectile packaging tube, characterized in that, Includes a grinding head assembly, an airflow pressure sensing assembly, a differential spiral compensation mechanism, a power unit, and a position preset module; The airflow pressure sensing component is used to detect the original airflow pressure signal corresponding to the grinding gap; The position preset module is used to identify the category of the cylinder section where the grinding head is located; The device is also equipped with a curved airflow correction module and a real-time gap calibration sensing unit; The curved surface airflow correction module is electrically connected to the position preset module and the airflow pressure sensing component, respectively. It is used to call the corresponding correction coefficient to correct the original airflow pressure signal according to the segment category identified by the position preset module, so as to filter out the gap change component caused by the curved surface fitting, and generate the wear real-time compensation amount accordingly. The position preset module is also used to generate surface adaptation adjustment amount based on preset path information; The real-time gap calibration sensing unit is coaxially mounted on the grinding head assembly and is used to detect the actual grinding gap in real time. The power unit is connected to the curved surface airflow correction module, the position preset module, and the real-time gap calibration sensing unit. It is used to receive the real-time wear compensation amount, the curved surface adaptation adjustment amount, and the calibration command generated based on the actual grinding gap, and drive the differential spiral compensation mechanism to perform the corresponding compensation action.

2. The device for grinding the inner wall of a projectile packaging cylinder according to claim 1, characterized in that, The correction coefficients correspond to the segment categories, including straight segment coefficients for straight segments, circular arc coefficients for circular arc segments, and conical coefficients for conical arc segments.

3. The device for grinding the inner wall of a projectile packaging cylinder according to claim 2, characterized in that, The arc coefficient is less than 1.0, the cone coefficient is greater than 1.0, and the transition region between the straight segment and the curved segment adopts a linear gradient correction coefficient.

4. The device for grinding the inner wall of a projectile packaging cylinder according to claim 1, characterized in that, The grinding head assembly is a segmented stepped grinding wheel, the airflow pressure sensing assembly is equipped with a multi-channel detection end, and the curved airflow correction module independently corrects the original airflow pressure signal of each channel.

5. The device for grinding the inner wall of a projectile packaging cylinder according to claim 1, characterized in that, The real-time gap calibration sensing unit is a non-contact displacement sensor with a detection accuracy of not less than ±0.001mm; The real-time gap calibration sensing unit is configured to: preset a reference grinding gap, and generate a calibration command when the absolute value of the deviation between the detected actual grinding gap and the reference grinding gap exceeds 0.003mm.

6. The device for grinding the inner wall of a projectile packaging cylinder according to claim 1, characterized in that, The airflow pressure sensing component is surrounded by an annular negative pressure guide shroud, which is connected to a negative pressure generating device to form a stable flow field in the detection area and discharge grinding debris.

7. The device for grinding the inner wall of a projectile packaging cylinder according to claim 1, characterized in that, A buffer structure is provided between the grinding head assembly and the differential spiral compensation mechanism. The buffer structure integrates a force sensor to detect axial grinding resistance. When the grinding resistance exceeds a preset threshold, the power unit will reduce the grinding pressure in conjunction.

8. The device for grinding the inner wall of a projectile packaging cylinder according to claim 1, characterized in that, It also includes a grinding wheel wear prediction module, which is connected to the curved surface airflow correction module and the position preset module respectively, and is used to output a feedforward compensation signal to the power unit based on historical wear data and the path to be ground.

9. The device for grinding the inner wall of a projectile packaging cylinder according to claim 1, characterized in that, It also includes a quality inspection unit, integrated into the grinding head assembly, for online detection of the surface roughness of the inner wall after grinding; the power unit dynamically adjusts the grinding process parameters according to the surface roughness.

10. The device for grinding the inner wall of a projectile packaging cylinder according to claim 1, characterized in that, The device is suitable for grinding the inner wall of military alloy steel projectile packaging cylinders with a specification of φ800mm×6m, and the fluctuation of the grinding gap is controlled within a range of no more than 0.01mm throughout the grinding process.

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