Civil air defense door surface polishing device and method

Abstract

The invention discloses a civil air defense door surface grinding device and method, relates to the technical field of grinding devices, and aims at the civil air defense door surface grinding process, a grinding wheel on a main shaft assembly serves as a grinding base structure, and the difference is that the grinding wheel adopts a movable connection mode, and a connecting rod serves as a rotating base point position; a pressure telescopic rod is used as a movable structure, on the basis of maintaining the basic grinding requirement, firstly, the grinding stroke of a main shaft assembly is further controlled according to size detection data of each displacement sensing assembly for the surface of the civil defense door, and the key point is that a grinding wheel can conduct small-amplitude deflection in the grinding process; according to the purpose, adaptive movement can be carried out according to the surface of the civil air defense door, the problem of over-grinding or miss-grinding is avoided, an integrated analysis action is further added, the deflection angle of each grinding wheel is changed by changing the output oil pressure of a hydraulic oil pump in cooperation with the change of the grinding stroke, and the grinding requirement of the surface of the civil air defense door is further met.

Description

Technical Field

[0001] The invention relates to the field of grinding devices, and in particular to a device and method for grinding the surface of a civil air defense door. Background Art

[0002] After the civil air defense door is processed and formed, its surface needs to be polished. The main purpose is to remove the surface defects such as welding points and rust, and make the surface of the civil air defense door completely flat to ensure that there are no depressions. Commonly used polishing equipment is grinding wheel, sandpaper, etc. For details, please refer to the relevant content in the publication number CN116551495A.

[0003] Due to the large size of the surface of the civil air defense door and the low efficiency of manual grinding, it is currently mainly completed by mechanical grinding. It should be noted that the structure of conventional civil air defense doors is essentially to splice steel plates of corresponding thickness. After splicing, the surface is not completely flat. When using a grinding wheel for grinding, the grinding wheel rotates at a uniform speed and moves in a directional manner on the surface of the civil air defense door. Because the gap between the grinding surface of the grinding wheel and the surface of the civil air defense door will change with the progress of grinding, if the operation is improper, the surface of the civil air defense door is prone to over-grinding or under-grinding. Over-grinding will cause wounds on the surface of the civil air defense door and affect the quality and appearance of the civil air defense door, while under-grinding requires re-grinding, which increases processing time, delays the construction period, and increases costs. In addition, re-grinding is likely to have an angle inconsistent with the previous grinding, resulting in multiple grinding marks at the same position, which affects both the quality and appearance of the civil air defense door. Summary of the invention

[0004] The purpose of the present invention is to provide a surface polishing device and method for civil air defense doors, so as to solve the problem of over-polishing or under-polishing that easily occurs during polishing of civil air defense doors in the prior art, improve the polishing efficiency, and ensure the quality and aesthetics of the civil air defense doors.

[0005] In order to solve the above problems, the technical solution adopted by the present invention is as follows: A surface grinding device for a civil air defense door comprises a working base assembly and a driving motor, a mounting platform is mounted on the side of the working base assembly, a main shaft assembly driven to rotate by the driving motor is arranged in the mounting platform, and a plurality of displacement sensor assemblies are mounted on both sides of the mounting platform along the grinding direction; The spindle assembly includes a roller shaft, a section sleeve and a grinding wheel, wherein the roller shaft is a long hollow circular tube structure, the section sleeve is a circular ring structure, the section sleeve is linearly equidistantly arranged on the outer wall of the roller shaft, and the grinding wheel is installed outside the section sleeve in a circular array; The mounting platform is also provided with a linkage system which is controlled by the displacement sensor component and can enable the grinding wheel to deflect on the joint sleeve.

[0006] Furthermore, the linkage system includes a pressure telescopic rod and a connecting rod arranged side by side on both sides of the inner wall of the grinding wheel, and a hydraulic oil pump providing telescopic power for the pressure telescopic rod; wherein, one end of the connecting rod is fixedly connected to the section sleeve, and the other end is rotatably connected to one side of the inner wall of the grinding wheel; one end of the pressure telescopic rod is fixedly connected to the section sleeve, and the other end is movably connected to the inner wall of the grinding wheel relative to one side of the connecting rod.

[0007] Furthermore, the pressure telescopic rod is a hollow structure and is connected to the hollow interior of the roller shaft; the output end of the hydraulic oil pump is connected to the hollow interior of the roller shaft.

[0008] Furthermore, a mounting groove is provided on the outer wall of the roller shaft along its length direction, and a limiting protrusion matching the mounting groove is provided on the inner wall of the section sleeve, and the section sleeve is clamped with the roller shaft through the cooperation of the limiting protrusion and the mounting groove.

[0009] Furthermore, an adjustment gap is arranged between all adjacent grinding wheel pieces, and the arrangement direction of the pressure telescopic rod and the connecting rod matches the grinding travel direction.

[0010] Furthermore, the roller shaft is rotatably connected to the mounting platform via a driving motor, and a tube sealing oil plug is rotatably mounted on one end of the roller shaft, and the tube sealing oil plug is fixedly connected to the mounting platform.

[0011] Furthermore, the hydraulic oil pump is installed on the upper surface of the mounting platform.

[0012] Furthermore, the upper ends of the displacement sensor components are fixed on both sides of the lower surface of the mounting platform, and the lower ends thereof are provided with balls, and the displacement sensor components are linearly and equidistantly arranged along the length direction of the roller shaft.

[0013] Furthermore, the arrangement position of the ball is lower than the lowest level of the grinding wheel.

[0014] The present invention also provides a method for polishing the surface of a civil air defense door, which is applied to the above-mentioned civil air defense door surface polishing device. The polishing process includes a pre-installation stage and a polishing detection stage, including the following contents: Pre-installation stage: before the grinding process, the number of installation sleeves is selected according to the grinding width requirements of the civil air defense door. The sum of the widths of each grinding wheel along the length of the roller shaft is greater than the grinding width requirements of the civil air defense door. Polishing detection stage: applied in the polishing process; First, the drive motor is started, and the spindle assembly moves at a constant speed with the side of the working base assembly as the moving reference line. At the same time, the displacement sensor assembly located on the front side of the moving direction of the mounting table obtains the gap value between the surface of the civil air defense door to be polished and the lowest horizontal position of the grinding wheel in real time, and performs integrated analysis on each gap value; Secondly, the displacement sensor component controls the adjustment value of the spindle component in the vertical direction and the output oil volume of the hydraulic oil pump according to the integrated analysis results; Then, the spindle assembly automatically adjusts its displacement in the vertical direction, and the hydraulic oil pump pumps the corresponding hydraulic oil into the inner hollow of the roller shaft. The hydraulic oil enters the pressure telescopic rod through the roller shaft to adjust the pressure on the pressure telescopic rod; Then, the pressure telescopic rod drives the grinding wheel to deflect outward or inward according to the change of pressure, so that the lowest level of the grinding wheel is adjusted to a standard suitable for grinding; Finally, the driving motor drives the roller shaft to rotate, which drives the grinding wheel to rotate to complete the grinding action; The displacement sensor component located on the rear side of the mounting platform in the moving direction obtains the gap value between the polished surface of the civil air defense door and the lowest horizontal position of the grinding wheel in real time, and performs integrated analysis on each gap value to determine whether over-grinding or under-grinding occurs.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. For the grinding process of the surface of the civil air defense door, the grinding wheel is used as the main grinding structure. The grinding wheel forms a ring structure around the roller shaft. The core design is that the grinding wheel is not installed in a fixed manner, but is flexibly connected with the connecting rod and the pressure telescopic rod. The displacement sensor component is used to realize data detection and integrated analysis. At the same time, as the control center, the hydraulic oil pump outputs hydraulic oil as the power. The increase or decrease of the hydraulic oil causes the pressure change, which causes the length of the pressure telescopic rod to change, and finally drives the grinding wheel to deflect with the connection point between it and the connecting rod as the fulcrum, thereby changing the distance between the lowest horizontal position of the grinding wheel and the upper surface of the civil air defense door in real time, so that the distance between the grinding wheel and the upper surface of the civil air defense door is always maintained at the most suitable distance for grinding, avoiding the problems of over-grinding or under-grinding in the prior art, and achieving the purpose of high-precision grinding of the surface of the civil air defense door, improving the grinding effect, and ensuring the quality of the civil air defense door.

[0016] 2. In the scheme provided by the present invention, the connecting rod and the pressure telescopic rod are respectively arranged at the two ends of the inner wall of the grinding wheel, firstly, they provide support for the normal operation of the grinding wheel, and ensure that the entire grinding wheel is balanced during operation. Secondly, the connection mode between the grinding wheel and the connecting rod and the connection mode with the pressure telescopic rod are two different modes. The grinding wheel and the connecting rod are connected in a rotating manner, that is, the grinding wheel can realize circumferential rotation with the connection point of the two as the fulcrum; and the connection with the pressure telescopic rod is a movable connection, which not only provides the grinding wheel with the required activity space for rotation, but also controls the rotation range of the grinding wheel to prevent the grinding wheel from rotating without limit after being stressed. At the same time, it can also avoid the rigid friction between the grinding wheel and the pressure telescopic rod when the grinding wheel rotates, causing wear on both. The ingenious combination of these two different connection modes not only changes the current situation that the grinding wheel is fixedly installed and cannot be adjusted in the prior art, but also effectively realizes the real-time fine-tuning of the grinding wheel during operation, which is very suitable for the application field of surface grinding that requires micro-manipulation, and is an important condition to ensure that the grinding wheel can achieve controllable deflection.

[0017] 3. In the present invention, the corresponding number of section sleeves can be configured according to the width of the civil air defense door, so that the total width of the section sleeves in the length direction of the roller shaft can be larger than the width of the civil air defense door, so that one civil air defense door can be polished at one time without repeatedly moving the installation table back and forth; or only one or a few section sleeves can be installed to perform fixed-point or local polishing on the civil air defense door. Therefore, the present invention can adapt to civil air defense doors of different sizes, has a wide range of applications, and is flexible and varied in use.

[0018] 4. In the present invention, during the entire grinding process, the displacement sensing component detects the distance between the lowest horizontal position of the grinding wheel and the upper surface of the civil air defense door in real time, and determines through integrated analysis whether the grinding wheel needs to adjust the distance from the upper surface of the civil air defense door at the next moment, as well as the exact value that needs to be adjusted, and then controls the hydraulic oil pump to adjust the output hydraulic oil amount, so that the pressure telescopic rod drives the grinding wheel to make a corresponding deflection movement, thereby completing the adjustment of the distance between the grinding wheel and the upper surface of the civil air defense door, so that the distance between the grinding surface of the grinding wheel and the upper surface of the civil air defense door more accurately meets the grinding requirements, and eliminates the occurrence of over-grinding or under-grinding, which not only improves the grinding efficiency of the surface of the civil air defense door, but also improves the grinding effect, greatly reduces the processing cost of the civil air defense door, and greatly improves the comprehensive performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the installation platform in the present invention; Figure 3 It is a structural schematic diagram of the main shaft assembly in the present invention; Figure 4 for Figure 3 Split diagram of ; Figure 5 The figure is a disassembled diagram of the grinding wheel, the segment sleeve, the connecting rod and the pressure telescopic rod in the present invention; Figure 6 It is a front view of the main shaft assembly corresponding to the mounting platform in the present invention; Figure 7 It is a partial cutaway view of the main shaft assembly in the present invention.

[0020] In the figure: 1. working base assembly; 2. displacement sensor component; 3. mounting table; 4. driving motor; 5. pressure telescopic rod; 6. hydraulic oil pump; 7. roller; 8. sealing oil plug; 9. grinding wheel; 10. joint sleeve; 11. connecting rod; 12. mounting groove; 13. limit bump. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Embodiment 1: Reference Figures 1 to 7 A surface grinding device for a civil air defense door includes a working base assembly 1 and a driving motor 4. A mounting platform 3 is installed at the head position of the working base assembly 1. The driving motor 4 is installed above the mounting platform 3. A main shaft assembly driven by the driving motor 4 to rotate is arranged at the lower part of the mounting platform. A plurality of displacement sensor assemblies 2 are respectively installed at the lower part of the mounting platform 3 and on both sides of the main shaft assembly.

[0023] The spindle assembly includes a roller shaft 7, a plurality of sleeves 10 and a grinding wheel 9 corresponding to the sleeves 10. The roller shaft 7 is arranged along the width direction of the working base assembly 1 so that the length direction of the roller shaft 7 is consistent with the width direction of the working base assembly 1. One end of the roller shaft 7 is linked to the driving motor 4, and the other end is equipped with a sealing oil plug 8. All the sleeves 10 are arranged side by side between the two ends of the roller shaft 7 and fixed to the roller shaft 7 by screws. The grinding wheel 9 is arranged on the outside of the sleeve 10, surrounding the outer wall of the sleeve, and a gap is arranged between adjacent grinding wheels, so that a certain degree of deflection can be performed on the sleeve 10. A plurality of mounting grooves 12 are provided on the outer wall of the roller shaft 7 for achieving limited fixation with the sleeve 10.

[0024] The connecting rod 11 is arranged vertically with the inner wall of the grinding wheel 9, one end of which is rotatably connected to the inner wall of the grinding wheel 9, and the other end is fixed on the joint sleeve 10. The pressure telescopic rod 5 is arranged vertically with the inner wall of the grinding wheel 9, one end of which is movably connected to the inner wall of the grinding wheel 9, and the other end passes through the joint sleeve 10 and extends into the roller shaft 7. The roller shaft 7 is hollow inside, and the pressure telescopic rod 5 is a hollow rod. The hollow parts of the two are interconnected and serve as a flow channel for hydraulic oil. The connecting rod 11 and the pressure telescopic rod 5 are distributed on both sides of the inner wall of the grinding wheel 9. While connecting the grinding wheel 9, they provide support for the grinding wheel, share the external force on the grinding wheel during operation, ensure that the forces on various parts of the grinding wheel are balanced, and there will be no uncontrolled deflection or tilt.

[0025] The sealing oil plug 8 is fixed on the side of the mounting platform 3. A hydraulic oil pump 6 is installed above the mounting platform 3 and on the same side as the sealing oil plug 8. The hydraulic oil pump 6 is connected to the internal hollow structure of the roller shaft 7 and can transport hydraulic oil to the internal space of the roller shaft 7.

[0026] The roller shaft 7 can rotate freely under the drive of the driving motor 4 , and is connected to the mounting platform 3 by the sealing oil plug 8 , so that the roller shaft 7 can move together with the mounting platform 3 .

[0027] The displacement sensor components 2 are arranged in parallel along the length direction of the roller shaft 7, and the upper end thereof is fixed to the lower part of the mounting platform 3, and the lower end is provided with a ball, and the setting position of the ball is lower than the lowest level of the grinding wheel 9, such as Figure 6 shown.

[0028] The basic working principle of this technology: The essence of the working base assembly 1 in the present invention is as a supporting platform for the civil air defense door, which includes driving structures in the X direction, Y direction and Z direction, such as Figure 1 As shown, the mounting table 3 is installed at the head position in the Z direction and can move horizontally in the Z direction. For details, it can be referred to the conventional three-axis machine tool. The overall mounting table 3 is a main body, which is first moved in the vertical direction by the driving structure in the Z direction, and the driving structure in the Z direction and the mounting table 3 can be moved in the Y direction by the driving structure in the Y direction. Similarly, the driving structures in the Y and Z directions and the mounting table 3 can be moved in the X direction by the driving structure in the X direction. This part will not be explained in detail. This technical solution uses multiple grinding wheels 9 as the core grinding structure. The difference between this and the conventional grinding structure is that the grinding wheels 9 are not fixedly mounted on the roller 7, but are mounted on the sleeve 10 through the pressure telescopic rod 5 and the connecting rod 11. The sleeve 10 is mounted on the roller 7, and the roller 7 is driven by the motor 4 to rotate at a constant speed, thereby driving the grinding wheels 9 to rotate, and finally completing the grinding work on the surface of the civil air defense door. It should be noted that: Figure 6As shown, the grinding wheel 9 can rotate circumferentially with the connection point between it and the connecting rod 11 as the rotation point, and at the same time, it is movably connected with the pressure telescopic rod 5. In this way, when an external force causes the pressure telescopic rod 5 to change in length, it will drive the grinding wheel 9 to rotate around the rotation point, so that the grinding wheel 9 will deflect. The direction and angle of deflection directly cause the shortest distance between the grinding wheel 9 and the surface of the civil air defense door to change, that is, directly affect the degree of grinding. Therefore, it is only necessary to control the size of the external force that causes the pressure telescopic rod 5 to change in length, and the problem of over-grinding or under-grinding existing in the prior art can be effectively solved.

[0029] The displacement sensing component 2 arranged in the length direction of the roller shaft 7 will detect the distance data between the upper surface of the civil air defense door and the grinding wheel in real time during the grinding process, and perform integrated analysis to determine the external force required by the pressure telescopic rod 5 at the next moment, and then control the hydraulic oil pump 6 to input the corresponding hydraulic oil into the hydraulic oil circulation pipeline, so as to enable the pressure telescopic rod 5 to achieve the corresponding range of telescopic action, and drive the grinding wheel 9 to complete the deflection of the corresponding angle and direction, thereby ensuring that the grinding degree at the next moment is completed according to the predetermined target to avoid over-grinding or under-grinding.

[0030] Embodiment 2: Based on embodiment 1, the deflection process of the grinding wheel during the overall grinding process is explained.

[0031] Combination Figure 2 and Figure 6 To explain, during the grinding process, the mounting table 3 drives the spindle assembly to move at a uniform speed along the length direction of the civil air defense door, and during the initial positioning process, first ensure that the outer surface of the lowest position of the grinding wheel 9 is in contact with the surface of the civil air defense door. In this process, it is also necessary to ensure that the ball on the displacement sensor assembly 2 is in contact with the surface of the civil air defense door, and a certain value has been generated on the displacement sensor assembly 2, indicating that the displacement sensor assembly 2 is in action. The displacement sensor assembly 2 moves with the movement of the mounting table 3, so as to obtain the surface data of the civil air defense door to be polished in real time, and analyze the obtained values. If it is necessary to pause the movement to perform the grinding action, the mounting table 3 is controlled to pause in the Z direction, so as to reserve enough grinding time for the grinding wheel 9. After the grinding is completed, the mounting table 3 is controlled to continue to move in a directional manner, and this is repeated.

[0032] Before the grinding operation is performed, the distance between the lowest outer surface of the grinding wheel 9 and the upper surface of the civil air defense door needs to be adjusted to a predetermined target, that is, the deflection direction and deflection angle of the grinding wheel 9 need to be adjusted to ensure the grinding effect and avoid over-grinding or under-grinding. Figure 6For example, if the mounting platform 3 moves from left to right, then the setting positions of the connecting rod 11 and the pressure telescopic rod 5 on the grinding wheel 9 are related to the moving direction of the mounting platform 3. More specifically, if the integral roller 7 rotates clockwise, in order to ensure that the grinding wheel 9 can only deflect counterclockwise along one end of the connecting rod 11, the connecting rod 11 and the pressure telescopic rod 5 are rotated counterclockwise along the moving direction of the mounting platform 3. Figure 6 The setting position of the middle roller shaft 7 is set in the counterclockwise direction. Its purpose is: when the grinding wheel 9 rotates, it can give way to avoid the grinding wheel 9 from colliding with the surface of the civil defense door. The pressure source inside the pressure telescopic rod 5 is hydraulic oil. Specifically, hydraulic oil is injected into the oil chamber channel inside the roller shaft 7 through the hydraulic oil pump 6 to make the pressure telescopic rod 5 reach the maximum telescopic stroke. For this, a sealing oil plug 8 is set at one end of the roller shaft 7. The sealing oil plug 8 serves as an injection structure for the hydraulic oil, and ensures that the sealing oil plug 8 is fixedly connected to the mounting platform 3, but maintains a rotating connection with the roller shaft 7.

[0033] Embodiment 3: The grinding process is described in combination with Embodiment 1 and Embodiment 2.

[0034] The grinding process mainly includes the pre-installation stage and the grinding inspection stage: Pre-installation stage: used before the whole set of equipment is started. The number of the section sleeves 10 is selected according to the width of the civil air defense door, so that the sum of the widths of the grinding wheel 9 in the length direction of the roller shaft 7 is greater than the width of the civil air defense door.

[0035] Grinding and detection stage: Applied in the grinding process, detection and grinding are carried out simultaneously. The spindle assembly moves at a uniform speed along the length direction of the civil air defense door, and the gap value between the grinding wheel 9 and the surface of the civil air defense door is obtained in real time through the displacement sensor assembly 2. At the same time, the displacement sensor assembly 2 performs integrated analysis on each gap value, and determines the adjustment value of the spindle assembly in the vertical direction and the output oil pressure of the hydraulic oil pump 6 according to the integrated analysis results. The hydraulic oil pump 6 inputs an appropriate amount of hydraulic oil to the roller shaft according to the integrated analysis results of the displacement sensor assembly 2. The input of hydraulic oil causes the telescopic range of the pressure telescopic rod 5 to change, thereby causing the grinding wheel 9 to deflect outward or inward. The displacement in the vertical direction corresponding to the deflection angle corresponds to the integrated analysis results of the displacement sensor assembly 2.

[0036] Combination Figure 4To explain, first, the number of section sleeves 10 is selected according to the width of the civil air defense door to ensure that the sum of the widths of the grinding wheel 9 in the length direction of the roller shaft 7 is greater than the width of the civil air defense door. In order to achieve the limit between the section sleeve 10 and the roller shaft 7, a plurality of installation grooves are provided on the outer wall of the roller shaft 7, and the inner wall of the section sleeve 10 is provided with a limit protrusion matching the installation groove. The installation grooves and the limit protrusions are consistent in number, shape, and size. When the section sleeve 10 is mounted on the roller shaft 7, the limit protrusion is inserted into the installation groove, so that the section sleeve and the roller shaft are relatively fixed, ensuring that the section sleeve cannot rotate arbitrarily on the roller shaft, and preventing the grinding wheel from being mis-deflected due to the rotation of the section sleeve alone, thereby affecting the grinding accuracy.

[0037] The connecting rod 11 and the pressure telescopic rod 5 are both used to connect the grinding wheel 9 and the roller 7, wherein the connecting rod 11 is used to realize rotational connection with the grinding wheel, so that the grinding wheel 9 can rotate circumferentially with the connection point between the two as the fulcrum. The inner hollow of the pressure telescopic rod 5 is connected with the inner hollow of the roller 7, so that the hydraulic oil from the hydraulic oil pump 6 can flow freely in the entire channel. The increase or decrease of the amount of hydraulic oil causes the pressure inside the pressure telescopic rod 5 to increase or decrease accordingly, thereby driving the pressure telescopic rod 5 to extend or shorten. The change in the length of the pressure telescopic rod 5 causes the grinding wheel 9 movably connected thereto to deflect outward or inward with the connection point between it and the connecting rod 11 as the fulcrum. The displacement in the vertical direction corresponding to the deflection angle corresponds to the previous integrated analysis result of the displacement sensor assembly 2.

[0038] The integrated analysis process of the displacement sensor assembly 2 is described below.

[0039] In the initial state, the maximum stroke of each pressure telescopic rod 5 is maintained by the hydraulic oil pump 6 .

[0040] S1: L1, L2, ...Ln represent the gap values ​​between the grinding wheel 9 and the surface of the air defense door, and obtain the maximum value Lmax and the minimum value Lmin from L1, L2, ...Ln. First, the grinding stroke of the mounting table 3 relative to the Z direction is determined according to the maximum value Lmax to ensure that the grinding wheel 9 can perform quantitative grinding on the surface of the air defense door according to the maximum value Lmax. Because the two sets of displacement sensor components are set along the grinding direction, Figure 6 The gap value in the displacement sensor assembly at the right position in the middle establishes a fluctuation curve, and the grinding stroke of the mounting table 3 relative to the Z direction is controlled in real time according to the fluctuation curve; Figure 6 The gap value in the displacement sensor assembly at the middle left position is used to indicate the grinding quality, ensuring that the gap value between the grinding wheel 9 and the surface of the civil air defense door remains relatively balanced without obvious difference.

[0041] S2: The maximum difference M=(Lmax-Lmin) / Rn during the grinding process is obtained by using the maximum value Lmax and the minimum value Lmin, where Rn represents the basic radius of the grinding wheel 9 relative to the connecting rod 11, and the output oil pressure of the hydraulic oil pump 6 is set to Qn based on this. When the grinding wheel 9 is deflected clockwise by a certain angle, Rn is in an increasing state, whereas when the grinding wheel 9 is deflected counterclockwise by a certain angle, Rn is in a decreasing state, and the optimal state is represented by Lmax=Lmin, so M=0. In this regard, during the specific operation, the output oil pressure of the hydraulic oil pump 6 is controlled in coordination with the grinding travel speed of the mounting table 3 and the maximum difference, which is specifically expressed as: Qi=Qn×(1+M). In simple terms, Qn represents the output oil pressure when the grinding wheel 9 is grinding at the basic radius, and Qi represents the output oil pressure when multiple grinding wheels 9 are adaptively deflected in actual situations. This is manifested as: the amount of hydraulic oil injected into the oil chamber channel increases, resulting in the actual telescopic stroke of each pressure telescopic rod 5 being greater than the maximum stroke, thereby further increasing the actual grinding gap. The key point is that when one of the grinding wheels 9 moves to the corresponding maximum value Lmax, it further deflects under the action of the hydraulic oil pressure, resulting in the pressure telescopic rod 5 of this part getting "more oil pressure distribution", while the grinding wheels 9 at other positions "lose part of the oil pressure", resulting in the reverse deflection of the grinding wheels 9 at this position. It can be directly understood that: each grinding wheel 9 can be adaptively deflected on the basis of maintaining the basic grinding requirements.

[0042] In summary, the grinding process of the surface of the civil air defense door uses the grinding wheel on the main shaft assembly as the main grinding structure, which is different from the conventional grinding device in that the grinding wheel 9 adopts a movable connection method, the connection point between the connecting rod 11 and the grinding wheel 9 is used as the fulcrum, the pressure telescopic rod 5 drives the grinding wheel 9 to deflect around the fulcrum, the hydraulic oil pump 6 inputs hydraulic oil as the power for the pressure telescopic rod 5 to complete the telescopic action, and then the displacement sensor assembly 2 is used to achieve real-time detection and control. On the basis of maintaining the basic grinding requirements, the grinding stroke of the main shaft assembly is first controlled according to the detection data of each displacement sensor assembly on the surface of the civil air defense door, and the grinding wheel is controlled to deflect slightly during the grinding process, so that the distance between the grinding wheel and the surface of the civil air defense door can be adjusted in real time according to the data changes detected by the displacement sensor assembly, so as to avoid over-grinding or under-grinding problems. Here, the real-time detection and integrated analysis of the displacement sensor assembly are used, and the deflection angle of each grinding wheel can be changed in real time by changing the output oil pressure of the hydraulic oil pump during the grinding process, so as to achieve high-precision operation of grinding the surface of the civil air defense door.

[0043] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0044] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A surface grinding device for a civil air defense door, comprising a working base assembly (1) and a drive motor (4), characterized in that: A mounting platform (3) is installed on the side of the working base assembly (1), a main shaft assembly driven to rotate by the driving motor (4) is arranged in the mounting platform (3), and a plurality of displacement sensor assemblies (2) are installed on both sides of the mounting platform (3) along the grinding direction; The spindle assembly comprises a roller (7), a section sleeve (10) and a grinding wheel (9), wherein the roller (7) is a long hollow circular tube structure, the section sleeve (10) is a circular ring structure, the section sleeve (10) is linearly equidistantly arranged on the outer wall of the roller (7), and the grinding wheel (9) is installed in a circular array outside the section sleeve (10); The mounting platform (3) is also provided with a linkage system which is controlled by the displacement sensing component (2) and can enable the grinding wheel (9) to deflect on the joint sleeve (10).

2. The surface grinding device for civil air defense door according to claim 1, characterized in that: The linkage system comprises a pressure telescopic rod (5) and a connecting rod (11) arranged side by side on both sides of the inner wall of the grinding wheel (9), and a hydraulic oil pump (6) for providing telescopic power to the pressure telescopic rod (5); wherein one end of the connecting rod (11) is fixedly connected to the sleeve (10), and the other end is rotatably connected to one side of the inner wall of the grinding wheel (9); one end of the pressure telescopic rod (5) is fixedly connected to the sleeve (10), and the other end is movably connected to the inner wall of the grinding wheel (9) relative to one side of the connecting rod (11).

3. The surface grinding device for civil air defense door according to claim 2, characterized in that: The pressure telescopic rod (5) is of a hollow structure and is in hollow communication with the interior of the roller shaft (7); the output end of the hydraulic oil pump (6) is in hollow communication with the interior of the roller shaft (7).

4. The surface grinding device for civil air defense door according to claim 3, characterized in that: An installation groove (12) is provided on the outer wall of the roller shaft (7) along its length direction, and a limiting protrusion (13) matching the installation groove is provided on the inner wall of the section sleeve (10). The section sleeve (10) is clamped with the roller shaft (7) through the cooperation between the limiting protrusion and the installation groove.

5. The surface grinding device for civil air defense door according to claim 4, characterized in that: Adjustable gaps are provided between all adjacent grinding wheel pieces (9), and the arrangement directions of the pressure telescopic rod (5) and the connecting rod (11) match the grinding travel direction.

6. The surface grinding device for civil air defense door according to claim 5, characterized in that: The roller shaft (7) is rotatably connected to the mounting platform (3) via a driving motor (4), and a pipe sealing oil plug (8) is rotatably mounted on one end of the roller shaft (7), and the pipe sealing oil plug (8) is fixedly connected to the mounting platform (3).

7. A surface grinding device for civil air defense door according to claim 2 or 6, characterized in that: The hydraulic oil pump (6) is mounted on the upper surface of the mounting platform (3).

8. The surface grinding device for civil air defense door according to claim 7, characterized in that: The upper ends of the displacement sensor components (2) are fixed to both sides of the lower surface of the mounting platform (3), and the lower ends thereof are provided with balls, and the displacement sensor components (2) are linearly and equidistantly arranged along the length direction of the roller shaft (7).

9. The surface grinding device for civil air defense door according to claim 8, characterized in that: The setting position of the ball is lower than the lowest level of the grinding wheel (9).

10. A method for polishing the surface of a civil air defense door, applied to a device for polishing the surface of a civil air defense door as claimed in any one of claims 1 to 9, characterized in that: The polishing process includes the pre-installation stage and the polishing inspection stage, including the following: Pre-installation stage: before the grinding process, the number of installation segments (10) is selected according to the grinding width requirement of the civil air defense door, and the sum of the widths of each grinding wheel (9) along the length direction of the roller shaft (7) is greater than the grinding width requirement of the civil air defense door; Polishing detection stage: applied in the polishing process; First, the drive motor (4) is started, and the spindle assembly moves at a constant speed with the side of the working base assembly (1) as the moving reference line. At the same time, the displacement sensor assembly (2) located on the front side of the moving direction of the mounting platform (3) obtains the gap value between the surface of the civil air defense door to be polished and the lowest horizontal position of the grinding wheel (9) in real time, and performs integrated analysis on each gap value; Secondly, the displacement sensor component (2) controls the adjustment value of the spindle component in the vertical direction and the output oil volume of the hydraulic oil pump (6) according to the integrated analysis result; Then, the main shaft assembly automatically adjusts its displacement in the vertical direction, and the hydraulic oil pump (6) pumps corresponding hydraulic oil into the inner hollow of the roller shaft (7). The hydraulic oil enters the pressure telescopic rod (5) through the roller shaft (7), thereby adjusting the pressure on the pressure telescopic rod (5); Then, the pressure telescopic rod (5) drives the grinding wheel (9) to deflect outward or inward according to the change in the pressure received, so that the lowest horizontal position of the grinding wheel (9) is adjusted to a standard suitable for grinding; Finally, the driving motor (4) drives the roller shaft (7) to rotate, which drives the grinding wheel (9) to rotate, thereby completing the grinding action; The displacement sensor assembly (2) located at the rear side of the moving direction of the mounting platform (3) obtains the gap value between the polished surface of the civil air defense door and the lowest horizontal position of the grinding wheel (9) in real time, and performs integrated analysis on each gap value to determine whether over-grinding or under-grinding occurs.

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