An anti-air-raid door surface grinding device and method

Abstract

The present invention discloses a surface grinding device and method for civil air defense doors, which relates to the technical field of grinding devices. For the grinding process of the surface of civil air defense doors, the grinding wheel on the main shaft assembly is used as the basic grinding structure. The difference is that the grinding wheel is connected in a movable manner, with the connecting rod as the rotation base point position and the pressure telescopic rod as the movable structure. On the basis of maintaining the basic grinding requirements, first, according to the size detection data of each displacement sensing component for the surface of the civil air defense door, the grinding stroke of the main shaft assembly is further controlled. The key lies in that the grinding wheel can deflect slightly during the grinding process, and its purpose is to move adaptively according to the surface of the civil air defense door to avoid the problems of over-grinding or under-grinding. Here, an integrated analysis action is further added, and by changing the output oil pressure of the hydraulic oil pump according to the change of the grinding stroke, the deflection angle of each grinding wheel is changed to further meet the grinding requirements of the surface of the civil air defense door.

Description

Technical Field

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

[0002] After the civil air defense door is processed and formed, its surface needs to be ground. The main purpose is to remove raised defects such as welding points and rust on the surface, and at the same time make the surface of the civil air defense door completely flat to ensure there are no depressions. Commonly used grinding equipment includes grinding wheels, sandpapers, etc. For specific details, reference can be made to the relevant content in the publication number CN116551495A.

[0003] Due to the large surface size of the civil air defense door, the efficiency of manual grinding is low, so currently it is mainly completed by mechanical grinding. It should be noted that: the structure of a conventional civil air defense door is essentially to splice steel plates of corresponding thickness. After splicing, its surface is not completely flat. When using a grinding wheel for grinding, the grinding wheel rotating at a constant speed moves directionally 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, over-grinding or under-grinding problems are likely to occur on the surface of the civil air defense door. Over-grinding will cause wounds on the surface of the civil air defense door, affecting the quality and aesthetics of the civil air defense door, while under-grinding requires re-grinding, increasing the processing time, delaying the project schedule, and thus increasing costs. Moreover, it is very easy to have a problem that the angle of the second grinding is inconsistent with that of the previous grinding, resulting in multiple grinding marks at the same position, which affects both the quality and the aesthetics of the civil air defense door. Summary of the Invention

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

[0005] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0006] A surface grinding device for civil air defense doors includes a working base assembly and a driving motor. An installation platform is installed on the side of the working base assembly. A main shaft assembly that is driven by the driving motor to rotate is arranged in the installation platform. A plurality of displacement sensing components are installed on both sides of the installation platform along the grinding travel direction.

[0007] The main shaft assembly includes a roller shaft, a sleeve, and a grinding wheel disc. Among them, the roller shaft is a long strip-shaped hollow circular tube structure, the sleeve is a circular ring structure, the sleeves are linearly and equidistantly arranged on the outer wall of the roller shaft, and the grinding wheel discs are installed in an annular array outside the sleeves.

[0008] A linkage system that is controlled by the displacement sensing components and can deflect the grinding wheel discs on the sleeves is also arranged on the installation platform.

[0009] Furthermore, the linkage system includes pressure telescopic rods and connecting rods arranged side by side on both sides of the inner wall of the grinding wheel disc, and a hydraulic oil pump for providing telescopic power to the pressure telescopic rods; wherein, one end of the connecting rod is fixedly connected to the joint sleeve, and the other end is rotatably connected to one side of the inner wall of the grinding wheel disc; one end of the pressure telescopic rod is fixedly connected to the joint sleeve, and the other end is movably connected to one side of the inner wall of the grinding wheel disc relative to the connecting rod.

[0010] Furthermore, the pressure telescopic rod is of a hollow structure and is hollow-connected to the inside of the roller shaft; the output end of the hydraulic oil pump is hollow-connected to the inside of the roller shaft.

[0011] Still further, an installation groove is formed in the outer wall of the roller shaft along its length direction, a limiting convex block matching with the installation groove is arranged on the inner wall of the joint sleeve, and the joint sleeve is clamped with the roller shaft through the cooperation of the limiting convex block and the installation groove.

[0012] Still further, an adjustment gap is provided between all adjacent grinding wheel discs, and the arrangement directions of the pressure telescopic rods and the connecting rods are matched with the grinding advancing direction.

[0013] Still further, the roller shaft is rotatably connected to the installation table through a driving motor, and a sealing pipe oil plug is rotatably installed at one end of the roller shaft, and the sealing pipe oil plug is fixedly connected to the installation table.

[0014] Even further, the hydraulic oil pump is installed on the upper surface of the installation table.

[0015] Even further, the upper end of the displacement sensing assembly is fixed on both sides of the lower surface of the installation table, the lower end of the displacement sensing assembly is provided with balls, and the displacement sensing assembly is linearly and equidistantly arranged along the length direction of the roller shaft.

[0016] Even further, the setting position of the balls is lower than the lowest horizontal position of the grinding wheel disc.

[0017] The present invention also provides a method for grinding the surface of a civil air defense door, which is applied to the above-mentioned civil air defense door surface grinding device. The grinding process includes a pre-installation stage and a grinding detection stage, and the contents are as follows:

[0018] Pre-installation stage: Applied before the grinding process, the installation quantity of the joint sleeves is selected according to the grinding width requirement of the civil air defense door, and the sum of the widths of each grinding wheel disc along the length direction of the roller shaft is greater than the grinding width requirement of the civil air defense door;

[0019] Grinding detection stage: Applied during the grinding process;

[0020] First, the drive motor starts, 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 sensing assembly located on the front side of the moving direction of the mounting table continuously 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, and conducts integrated analysis on each gap value;

[0021] Secondly, the displacement sensing assembly controls the adjustment value of the spindle assembly in the vertical direction and the output oil volume of the hydraulic oil pump according to the integrated analysis result;

[0022] Then, the spindle assembly automatically adjusts its displacement in the vertical direction, and the hydraulic oil pump pumps corresponding hydraulic oil into the internal hollow of the roller shaft. The hydraulic oil enters the inside of the pressure expansion rod through the roller shaft to adjust the pressure received by the pressure expansion rod;

[0023] Then, the pressure expansion rod drives the grinding wheel to deflect outward or inward according to the change in the received pressure, so that the lowest horizontal position of the grinding wheel is adjusted to the standard suitable for grinding;

[0024] Finally, the drive motor drives the roller shaft to rotate, driving the grinding wheel to rotate to complete the grinding operation;

[0025] The displacement sensing assembly located on the rear side of the moving direction of the mounting table continuously obtains the gap value between the surface of the polished civil air defense door and the lowest horizontal position of the grinding wheel, and conducts integrated analysis on each gap value to judge whether there is over-grinding or under-grinding phenomenon.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. For the grinding process of the surface of the civil air defense door, the grinding wheel is used as the main grinding structure, and the grinding wheel forms an annular structure around the roller shaft. Its core design lies in that the installation method of the grinding wheel is not fixed installation, but is movably connected with the connecting rod and the pressure expansion rod. The displacement sensing assembly is used to realize data detection and integrated analysis, and at the same time as the control center, the hydraulic oil output by the hydraulic oil pump is used as the power. The increase or decrease of the hydraulic oil causes a pressure change, which prompts the length of the pressure expansion rod to change, and finally drives the grinding wheel to deflect with the connection point between it and the connecting rod as the fulcrum, so as to continuously change the distance between the lowest horizontal position of the grinding wheel and the upper surface of the civil air defense door, so that the distance between the grinding wheel and the upper surface of the civil air defense door always remains 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.

[0028] 2. In the solution provided by the present invention, the connecting rod and the pressure telescopic rod are respectively arranged at both ends of the inner wall of the grinding wheel. Firstly, they provide a supporting effect for the normal operation of the grinding wheel, ensuring that the entire grinding wheel is evenly stressed during operation. Secondly, the connection methods between the grinding wheel and the connecting rod and between the grinding wheel and the pressure telescopic rod are two different methods. The connection between the grinding wheel and the connecting rod is a rotational connection, that is, with the connection point between the two as the fulcrum, the grinding wheel can achieve circumferential rotation; while the connection with the pressure telescopic rod is a movable connection. In this way, it not only provides the movable space required for the rotation of the grinding wheel, but also can control the rotation range of the grinding wheel, preventing the grinding wheel from rotating without limit after being stressed, and at the same time avoiding rigid friction between the grinding wheel and the pressure telescopic rod during rotation, causing wear to both. The ingenious combination of these two different connection methods not only changes the current situation where the grinding wheel is fixedly installed and cannot be adjusted in the prior art, but also effectively realizes the real-time fine adjustment of the grinding wheel during operation, which is very suitable for application fields such as surface grinding that require micro-operations. It is an important condition to ensure the controllable deflection of the grinding wheel.

[0029] 3. In the present invention, the corresponding number of sleeve sets can be configured according to the width of the civil air defense door, so that the total width of the sleeve sets in the length direction of the roller shaft is greater than the width of the civil air defense door, thus enabling the grinding of one civil air defense door at a time without repeatedly moving the installation table back and forth; or only one or a few sleeve sets can be installed to perform fixed-point or local grinding on the civil air defense door. Therefore, the present invention can adapt to civil air defense doors of different sizes, has a wide application range, and a flexible and variable usage method.

[0030] 4. In the present invention, during the entire grinding process, the displacement sensing component continuously detects the distance between the lowest horizontal position of the grinding wheel and the upper surface of the civil air defense door, and judges whether the grinding wheel needs to adjust the distance from the upper surface of the civil air defense door at the next moment and the accurate value that needs to be adjusted through integrated analysis, and then controls the hydraulic oil pump to adjust the output hydraulic oil volume, so that the pressure telescopic rod drives the grinding wheel to make corresponding deflection actions, thereby completing the adjustment of the distance between the grinding wheel and the upper surface of the civil air defense door, making the distance between the grinding surface of the grinding wheel and the upper surface of the civil air defense door more accurately meet the grinding requirements, eliminating the occurrence of over-grinding or under-grinding phenomena, improving both the grinding efficiency of the surface of the civil air defense door and the grinding effect, greatly reducing the processing cost of the civil air defense door, and greatly improving the comprehensive performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is the overall structural schematic diagram of the present invention;

[0032] Figure 2 is the structural schematic diagram of the installation table in the present invention;

[0033] Figure 3 is the structural schematic diagram of the main shaft assembly in the present invention;

[0034] Figure 4 isFigure 3 Exploded view;

[0035] Figure 5 This is the exploded view of the grinding wheel disc, the joint sleeve, the connecting rod and the pressure telescopic rod in the present invention;

[0036] Figure 6 This is the front view of the mounting table corresponding to the main shaft assembly in the present invention;

[0037] Figure 7 This is the partial sectional view of the main shaft assembly in the present invention.

[0038] In the figure: 1. Working base assembly; 2. Displacement sensing assembly; 3. Mounting table; 4. Driving motor; 5. Pressure telescopic rod; 6. Hydraulic oil pump; 7. Roller shaft; 8. Pipe sealing oil plug; 9. Grinding wheel disc; 10. Joint sleeve; 11. Connecting rod, 12. Mounting groove, 13. Limiting convex block. Detailed implementation manners

[0039] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are only a 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 those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0040] Embodiment 1:

[0041] Refer to Figures 1 to 7 , a surface grinding device for a civil air defense door, including a working base assembly 1 and a driving motor 4. A mounting table 3 is installed at the head position of the working base assembly 1, and the driving motor 4 is installed above the mounting table 3. A main shaft assembly that rotates driven by the driving motor 4 is arranged below the mounting table, and a plurality of displacement sensing assemblies 2 are respectively installed on both sides of the main shaft assembly below the mounting table 3.

[0042] The main shaft assembly includes a roller shaft 7, a plurality of joint sleeves 10 and grinding wheel discs 9 corresponding to the joint sleeves 10. Among them, 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 with the driving motor 4, and a pipe sealing oil plug 8 is installed at the other end. All the joint sleeves 10 are arranged side by side and sleeved between the two ends of the roller shaft 7, and are fixedly installed with the roller shaft 7 by screws. The grinding wheel discs 9 are arranged outside the joint sleeves 10 and surround the outer wall of the joint sleeves for one week. There is a gap between adjacent grinding wheel discs, and they can deflect to a certain extent on the joint sleeves 10. A plurality of mounting grooves 12 are opened on the outer side wall of the roller shaft 7 for realizing limit fixation with the joint sleeves 10.

[0043] The connecting rod 11 is vertically arranged with respect to the inner wall of the grinding wheel 9. One end of the connecting rod 11 is rotatably connected to the inner wall of the grinding wheel 9, and the other end is fixed to the joint sleeve 10. The pressure telescopic rod 5 is vertically arranged with respect to the inner wall of the grinding wheel 9. One end of the pressure telescopic rod 5 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 inside of the roller shaft 7 is hollow, and the pressure telescopic rod 5 is a hollow rod. The hollow parts of the two communicate with each other and jointly serve as the flow channel for the 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 a supporting effect on the grinding wheel 9, jointly sharing the external forces received by the grinding wheel 9 during operation, ensuring that the forces on all parts of the grinding wheel are balanced, and preventing uncontrolled deflection or inclination.

[0044] The pipe sealing oil plug 8 is fixed on the side of the mounting table 3. Above the mounting table 3 and on the same side as the pipe sealing oil plug 8, a hydraulic oil pump 6 is installed. The hydraulic oil pump 6 is connected to the internal hollow structure of the roller shaft 7 and can deliver hydraulic oil to the internal space of the roller shaft 7.

[0045] Driven by the driving motor 4, the roller shaft 7 can rotate freely. At the same time, the connection between the pipe sealing oil plug 8 and the mounting table 3 enables the roller shaft 7 to move together with the mounting table 3.

[0046] The displacement sensing assembly 2 is arranged in parallel along the length direction of the roller shaft 7. Its upper end is fixed to the lower part of the mounting table 3, and its lower end is provided with a ball. The position of the ball is lower than the lowest horizontal position of the grinding wheel 9, as Figure 6 shown.

[0047] The basic working principle of this technology: The working base assembly 1 in the present invention essentially serves as a supporting platform for the civil air defense door, which includes driving structures in the X, Y, and Z directions. As Figure 1 shown, the mounting table 3 is installed at the head position in the Z direction and can move horizontally in the Z direction. Specifically, it can refer to a conventional three-axis machine tool. The entire mounting table 3 serves as a main body. First, it moves vertically through the driving structure in the Z direction, and the driving structure in the Z direction and the mounting table 3 can move in the Y direction through the driving structure in the Y direction. Similarly, the driving structures in the Y and Z directions and the mounting table 3 can move in the X direction through the driving structure in the X direction. This part will not be elaborated further;

[0048] This technical solution uses multiple grinding wheels 9 as the core grinding structure. The difference from the conventional grinding structure is that the grinding wheel 9 is not installed on the roller shaft 7 in a fixed manner, but is installed on the joint sleeve 10 through the pressure telescopic rod 5 and the connecting rod 11. The joint sleeve 10 is sleeved on the roller shaft 7, and the roller shaft 7 rotates at a constant speed through the driving motor 4, thereby driving the grinding wheel 9 to rotate and finally completing the grinding work on the surface of the civil air defense door. It should be particularly noted that: As 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. At the same time, it is movably connected to 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, thereby causing the grinding wheel 9 to deflect. The direction and magnitude of the deflection directly cause the change in the shortest distance between the grinding wheel 9 and the surface of the civil air defense door, that is, directly affect the grinding degree. Therefore, only by controlling the magnitude of the external force that causes the pressure telescopic rod 5 to change in length can the problems of over-grinding or lack of grinding existing in the prior art be effectively solved.

[0049] The displacement sensing component 2 arranged in the length direction of the roller shaft 7 will, during the grinding process, detect the spacing data between the upper surface of the civil air defense door and the grinding wheel in real time, and perform integrated analysis to determine the magnitude of the external force required by the pressure telescopic rod 5 at the next moment. Then, it controls the hydraulic oil pump 6 to input the corresponding hydraulic oil into the hydraulic oil circulation pipeline, prompting the pressure telescopic rod 5 to perform telescopic actions within the corresponding range, driving the grinding wheel 9 to complete deflections at the corresponding angles and directions, so as to ensure that the grinding degree at the next moment is completed according to the predetermined target and avoid over-grinding or lack of grinding.

[0050] Embodiment 2: Based on Embodiment 1, the deflection process of the grinding wheel during the overall grinding process will be explained.

[0051] Combined with Figure 2 and Figure 6 it is described that during the grinding process, the mounting table 3 drives the main shaft assembly to move uniformly 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 just contacts the surface of the civil air defense door. In this process, it is also necessary to ensure that the ball on the displacement sensing component 2 contacts the surface of the civil air defense door, and a certain value has been generated on the displacement sensing component 2, indicating that the displacement sensing component 2 is in an operating state. The displacement sensing component 2 moves with the movement of the mounting table 3, thereby obtaining the surface data of the civil air defense door to be ground in real time and analyzing the obtained values. If it is necessary to pause the movement to perform the grinding action, then control the mounting table 3 to pause the movement in the Z direction, thereby leaving enough grinding time for the grinding wheel 9. After the grinding is completed, then control the mounting table 3 to continue to move in a fixed direction, and so on.

[0052] At the moment before performing the grinding action, it is necessary to adjust the distance between the lowest outer surface of the grinding wheel 9 and the upper surface of the civil air defense door to the predetermined target, that is, to adjust the deflection direction and deflection angle of the grinding wheel 9 to ensure the grinding effect and avoid over-grinding or lack of grinding. Taking Figure 6For example, if the installation platform 3 travels in the left-to-right direction, the installation positions of the connecting rod 11 and the pressure telescopic rod 5 on the grinding wheel 9 are related to the traveling direction of the installation platform 3. More specifically: If the overall roller shaft 7 rotates clockwise, in order to ensure that the grinding wheel 9 can only deflect counterclockwise along one end position of the connecting rod 11, thus the connecting rod 11 and the pressure telescopic rod 5 are arranged counterclockwise along Figure 6 the setting position of the middle roller shaft 7. The purpose is: When the grinding wheel 9 rotates, it can make way to avoid the problem of collision between the grinding wheel 9 and the surface of the civil air defense door. The pressure source inside the pressure telescopic rod 5 is hydraulic oil. Specifically, the hydraulic oil pump 6 injects hydraulic oil into the oil cavity channel inside the roller shaft 7 to make the pressure telescopic rod 5 reach the maximum telescopic stroke. For this, a sealed pipe oil plug 8 is set at one end position of the roller shaft 7. The sealed pipe oil plug 8 serves as the injection structure for the hydraulic oil, and it is ensured that the sealed pipe oil plug 8 is fixedly connected to the installation platform 3, but maintains a rotational connection with the roller shaft 7.

[0053] Embodiment 3: The grinding process will be described by combining Embodiment 1 and Embodiment 2.

[0054] The grinding process mainly includes a pre-installation stage and a grinding detection stage:

[0055] Pre-installation stage: Applied before the start of the whole set of equipment. Select the number of sleeve sets 10 according to the width of the civil air defense door, so that the sum of the widths of the grinding wheels 9 in the length direction of the roller shaft 7 is greater than the width of the civil air defense door.

[0056] Grinding detection stage: Applied during the grinding process, and detection and grinding are carried out simultaneously. The main shaft assembly moves uniformly along the length direction of the civil air defense door. The displacement sensing assembly 2 obtains the gap value between the grinding wheel 9 and the surface of the civil air defense door in real time. At the same time, the displacement sensing assembly 2 conducts an integrated analysis on each gap value, and determines the adjustment value of the main shaft assembly in the vertical direction and the output oil pressure of the hydraulic oil pump 6 according to the integrated analysis result. The hydraulic oil pump 6 inputs an appropriate amount of hydraulic oil into the roller shaft according to the integrated analysis result of the displacement sensing assembly 2. The input of the 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 amount in the vertical direction corresponding to the deflection angle corresponds to the previous integrated analysis result of the displacement sensing assembly 2.

[0057] Combined with Figure 4The description is as follows. First, select the number of sleeve sets 10 according to the width of the civil air defense door to ensure that the sum of the widths of the grinding wheels 9 in the length direction of the roller shaft 7 is greater than the width of the civil air defense door. To achieve the limit between the sleeve set 10 and the roller shaft 7, a plurality of installation grooves are provided on the outer wall of the roller shaft 7, and limiting protrusions matching the installation grooves are provided on the inner wall of the sleeve set 10. The number, shape, and size of the installation grooves and the limiting protrusions are the same. When the sleeve set 10 is sleeved on the roller shaft 7, the limiting protrusions are snapped into the installation grooves, so that the relative fixation between the sleeve set and the roller shaft is realized, ensuring that the sleeve set cannot rotate arbitrarily on the roller shaft, preventing the grinding wheel from being misdeflected due to the independent rotation of the sleeve set, and thus affecting the grinding accuracy.

[0058] Both the connecting rod 11 and the pressure telescopic rod 5 are used to connect the grinding wheel 9 and the roller shaft 7. Among them, the connecting rod 11 is used to realize the 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 cavity of the pressure telescopic rod 5 is connected to the inner cavity of the roller shaft 7 to allow the hydraulic oil from the hydraulic oil pump 6 to flow freely in the entire channel. The increase or decrease of the hydraulic oil volume causes the pressure inside the pressure telescopic rod 5 to increase or decrease accordingly, and then drives the pressure telescopic rod 5 to extend or contract. 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 amount in the vertical direction corresponding to the deflection angle corresponds to the integrated analysis result before the displacement sensing component 2.

[0059] The following describes the integrated analysis process of the displacement sensing component 2.

[0060] In the initial state, the maximum stroke of each pressure telescopic rod 5 is maintained by the hydraulic oil pump 6.

[0061] S1: Represent the gap values between the grinding wheel 9 and the surface of the civil air defense door by L1, L2,... Ln, and obtain the maximum value Lmax and the minimum value Lmin from L1, L2,... Ln. First, determine the grinding stroke of the installation table 3 relative to the Z direction according to the maximum value Lmax to ensure that the grinding wheel 9 can perform quantitative grinding on the surface of the civil air defense door according to the maximum value Lmax. Because the two sets of displacement sensing components are arranged along the grinding travel direction, Figure 6 establish a fluctuation curve based on the gap values in the displacement sensing component at the right position among them, and control the grinding stroke of the installation table 3 relative to the Z direction in real time according to the fluctuation curve; Figure 6 the gap values in the displacement sensing component at the left position among them are used to represent the grinding quality to ensure that the gap values between the grinding wheel 9 and the surface of the civil air defense door are relatively balanced and there is no obvious difference.

[0062] S2: Obtain the maximum difference M = (Lmax - Lmin) / Rn during the grinding process with the maximum value Lmax and the minimum value Lmin. Rn represents the base radius of the grinding wheel 9 relative to the connecting rod 11, and based on this, set the output oil pressure of the hydraulic oil pump 6 to Qn. When the grinding wheel 9 deflects a certain angle clockwise, Rn is in an increasing state. Conversely, when the grinding wheel 9 deflects a certain angle counterclockwise, Rn is in a decreasing state, and the optimal state is expressed as Lmax = Lmin, so M = 0. In the specific operation process, the output oil pressure of the hydraulic oil pump 6 is controlled in coordination with the grinding travel speed of the installation table 3 and the maximum difference, specifically expressed as: Qi = Qn×(1 + M). Briefly explained: Qn represents the output oil pressure when the grinding wheel 9 grinds with the base radius, and Qi represents the output oil pressure when multiple grinding wheels 9 deflect adaptively in actual situations. It 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 "more oil pressure distribution" for the pressure telescopic rod 5 in this part, while the grinding wheels 9 in other positions "lose part of the oil pressure", causing the grinding wheels 9 in this position to deflect in the opposite direction. It can be directly understood that each grinding wheel 9 can deflect adaptively on the basis of maintaining the basic grinding requirements.

[0063] To sum up: In the grinding process of the surface of the civil air defense door, the grinding wheel on the main shaft assembly is used as the main grinding structure. Different from the conventional grinding device, 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 rotate around the fulcrum to achieve the deflection action, the hydraulic oil input by the hydraulic oil pump 6 is used as the power for the pressure telescopic rod 5 to complete the telescopic action, and then the displacement sensing component 2 is used to realize real-time detection and control. On the basis of maintaining the basic grinding requirements, first control the grinding stroke of the main shaft assembly according to the detection data of each displacement sensing component for the surface of the civil air defense door, and control the grinding wheel 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 change detected by the displacement sensing component, achieving the purpose of avoiding over-grinding or under-grinding problems. By using the real-time detection and integrated analysis of the displacement sensing component here, 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, realizing the high-precision operation of the surface grinding of the civil air defense door.

[0064] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0065] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to only the specific implementation manners. Obviously, according to the content of this specification, many modifications and changes can be made. 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 well understand and utilize the present invention. The present invention is only limited 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 and a driving motor, characterized in that: A mounting platform is installed on the side of the working base assembly, and a spindle assembly driven by the driving motor is arranged in the mounting platform, and a plurality of displacement sensor assemblies are installed 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 controlled by the displacement sensing component and capable of causing the grinding wheel to deflect on the segment sleeve. The linkage system comprises 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 segment 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 segment sleeve, and the other end is movably connected to one side of the inner wall of the grinding wheel relative to the connecting rod; 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, and an adjustment gap is provided between all adjacent grinding wheels. The setting direction of the pressure telescopic rod and the connecting rod matches the grinding travel direction. The roller shaft is rotatably connected to the mounting platform through a driving motor, and a sealing oil plug is rotatably installed at one end of the roller shaft, and the sealing oil plug is fixedly connected to the mounting platform.

2. The surface grinding device for civil air defense door according to claim 1, characterized in that: An installation groove is provided on the outer wall of the roller shaft along its length direction, and a limiting protrusion matching the installation groove is provided on the inner wall of the section sleeve. The section sleeve is clamped with the roller shaft through the cooperation of the limiting protrusion and the installation groove.

3. The surface grinding device for civil air defense door according to claim 1, characterized in that: The hydraulic oil pump is mounted on an upper surface of the mounting table.

4. The surface grinding device for civil air defense door according to claim 1, characterized in that: 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.

5. The surface grinding device for civil air defense door according to claim 4, characterized in that: The setting position of the ball is lower than the lowest level of the grinding wheel.

6. 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 5, 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 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 plane 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 plane of the grinding wheel in real time, and performs integrated analysis on each gap value to determine whether over-grinding or under-grinding occurs.

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