Multi-point equivalent grinding head for aviation plates

Abstract

The utility model relates to a multi-point equivalent polishing head for aviation plates, which comprises a polishing driving component mounted on a lifting frame of a workbench, and a primary adjustable supporting component capable of pre-adjusting the relative height of a plurality of supporting points according to the surface profile of the aviation plates is mounted on a mounting table of the polishing driving component. The end, away from the mounting table, of the primary adjustable supporting assembly is connected with an equivalent pressurization supporting assembly, and the end, away from the primary adjustable supporting assembly, of the equivalent pressurization supporting assembly is connected with an elastic forming strip plate which is adjustably limited to be in a plate body shape matched with the surface profile of the aviation plate. And a plurality of polishing blocks which adaptively and equivalently abut against the surface of the aviation plate are embedded in the surface of the elastic forming strip plate in a staggered dot matrix mode. According to the multi-area polishing device, multi-area polishing treatment with the same effect can be carried out in a matched mode at the same time, and the polishing uniformity, the polishing quality and the polishing efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of grinding and processing equipment for aerospace parts, and in particular to a multi-point equivalent grinding head for aerospace sheet metal. Background Technology

[0002] In the aerospace field, alloy parts are widely used. Furthermore, with the continuous innovation of aerospace products, their structural shapes are becoming increasingly complex. The materials used for outer skins are gradually developing towards higher hardness, higher modulus, and multifunctionality. Titanium alloys, high-temperature alloys, and composite materials are typical examples of materials used in aerospace products. For instance, the processing of aerospace sheet metal parts such as aircraft skins mainly consists of cutting, hot pressing, grinding, and spraying operations. Grinding the skin is crucial for ensuring a smooth surface, thereby improving assembly compatibility, coating uniformity, and airflow smoothness.

[0003] Most aircraft skins are non-flat sheet metal parts. The sanding process requires constant adjustment of the sanding intensity to ensure that different areas of the sheet metal receive approximately equal frictional force to achieve a relatively uniform sanding effect. Therefore, most sanding operations are still carried out manually. However, manual sanding relies entirely on the operator's experience to control the degree of sanding. This is labor-intensive and prone to damage due to excessive force or ineffective sanding due to insufficient force, resulting in large fluctuations in sanding quality and low yield. Furthermore, although existing automated sanding mechanisms can improve the control of sanding force, they are still unable to adapt to changes in the surface contour of the skin and adjust the pressure of the sanding head on the skin surface. This results in the curved sheet metal not being sanded evenly, and the degree and effect of sanding on different surface areas are inconsistent, leading to poor overall sanding quality. In particular, existing grinding equipment can only use a single grinding head to grind curved aerospace sheet metal such as skin. It cannot simultaneously grind multiple areas of non-flat surfaces in an equivalent manner. It cannot guarantee the uniformity of grinding and cannot improve grinding efficiency, resulting in low grinding speed during mass production, which prolongs the grinding cycle and reduces production efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a multi-point equivalent grinding head for aerospace sheet metal that can simultaneously and adaptably perform grinding processes on multiple areas with equal effectiveness, thereby improving grinding uniformity, grinding quality, and grinding efficiency. This addresses the shortcomings of existing grinding equipment when grinding aerospace sheet metal parts with complex, non-flat surfaces, such as aircraft skin. These shortcomings include the inability to precisely adjust the grinding intensity of the grinding head to ensure consistent grinding force across different areas, resulting in uneven grinding distribution and poor grinding yield. Furthermore, existing grinding equipment uses only a single grinding head to grind aerospace sheet metal, leading to low grinding efficiency and long grinding cycles, which restricts the mass production of aerospace parts.

[0005] The technical solution adopted by this utility model is as follows: a multi-point equivalent grinding head for aerospace sheet metal, including a grinding drive assembly mounted on a lifting frame on a worktable; a primary adjustable support assembly mounted on the mounting platform of the grinding drive assembly, capable of pre-adjusting the relative height of several support points according to the surface contour of the aerospace sheet metal; an equivalent pressure support assembly connected to one end of the primary adjustable support assembly away from the mounting platform; and an elastic molding strip plate adjustablely defined to fit the surface contour of the aerospace sheet metal at one end of the equivalent pressure support assembly away from the primary adjustable support assembly; the surface of the elastic molding strip plate is also staggered with several grinding blocks that are adapted to and equivalently abut against the surface of the aerospace sheet metal.

[0006] According to a preferred embodiment, the primary adjustable support assembly has multiple telescopic support rods dotted on the mounting platform, and a first limiting frame is provided on the mounting platform that can be sleeved on the telescopic support rods to define the relative positions between the telescopic support rods.

[0007] According to a preferred embodiment, the first limiting frame includes a first limiting support column and a first limiting frame plate, wherein a plurality of the first limiting support columns are connected to the corners of the first limiting frame plate to suspend the first limiting frame plate directly below the mounting platform, and a plurality of the telescopic support rods are inserted into the first limiting frame plate.

[0008] According to a preferred embodiment, the equivalent pressurization assembly includes an equivalent pressure supply body, an equivalent support column, an air guide pipe, a constant pressure regulating unit, and a second limiting frame. The equivalent support column is installed at the end of the telescopic support rod away from the mounting platform, corresponding to the telescopic support rod, and is connected to the equivalent pressure supply body via the air guide pipe. The constant pressure regulating unit is also connected to the side of the equivalent pressure supply body. A second limiting frame, capable of defining the relative positions of several parallel equivalent support columns within the same cross-section, is also supported on the first limiting frame plate.

[0009] According to a preferred embodiment, the gas storage shell of the equivalent pressure supply body is detachably installed on the side edge of the first limiting frame plate, and a plurality of the gas guiding connecting pipes are connected at intervals on the side of the gas storage shell facing the equivalent support column; an inflation unit and the constant pressure regulating unit are installed on the surface of the gas storage shell away from the gas guiding connecting pipes.

[0010] According to a preferred embodiment, the equivalent support column includes a column cylinder, a column rod, an adjusting plate, and a sealing ring. The column cylinder is mounted on the telescopic support rod, and the column rod is inserted into one end of the column cylinder away from the telescopic support rod. The adjusting plate, which is adapted to the cross-section of the column cylinder, is connected to one end of the column rod inserted into the column cylinder. The sealing ring is provided on the side edge of the adjusting plate and in the insertion port of the column cylinder.

[0011] According to a preferred embodiment, a plurality of the column rods are connected to the elastically molded strip at their ends away from the column tube in a dot matrix distribution.

[0012] According to a preferred embodiment, the constant pressure regulating unit includes an air cylinder, a piston body, a pressure regulating rod, a mounting plate, and a corner connecting pipe. The air guide end of the air cylinder is connected to the air storage shell through the corner connecting pipe. The piston body, which can change the size of the air storage cavity, is also provided inside the air cylinder. The piston body is also connected to the pressure regulating rod, and the bottom end of the pressure regulating rod is connected to the mounting plate installed on the outer side of the air storage shell.

[0013] According to a preferred embodiment, the second limiting support column of the second limiting frame is supported on the first limiting frame plate, and multiple second limiting support columns are connected to the edges and corners of the second limiting frame plate; the second limiting frame plate is fitted onto the column tube.

[0014] The beneficial effects of this utility model are:

[0015] The primary adjustable support component of this application can be adjusted at different heights at different points according to the actual shape and contour of the aerospace sheet, so that the elastic molding strip can be roughly shaped to match the surface shape of the aerospace sheet. Furthermore, the equivalent pressure support component provides a multi-point, equally sized positioning support force to the elastic molding strip, allowing several grinding blocks on the surface of the elastic molding strip to be pressed against the surface of the aerospace sheet with equal pressure. This results in equal grinding force and intensity across multiple areas during translation, ensuring uniformity and consistency in grinding effect, effectively improving overall grinding quality. The primary adjustable support component and the equivalent pressure support component of this application can cooperate to form a reconfigurable staggered matrix grinding structure, enabling simultaneous equivalent grinding of non-flat surfaces across multiple areas using multiple grinding blocks with positional differences. This improves grinding efficiency while ensuring uniformity, increasing grinding speed and shortening the grinding cycle during batch processing, thus enhancing production efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a preferred multi-point equivalent grinding head for aerospace sheet metal proposed in this utility model;

[0017] Figure 2 This is a schematic diagram of the equivalent pressure support assembly of a preferred multi-point equivalent grinding head for aerospace sheet metal proposed in this utility model.

[0018] Figure 3 This is a plan view of an elastically formed strip with a multi-point equivalent grinding head for aviation sheet metal, as proposed in this utility model.

[0019] List of reference numerals

[0020] 1: Grinding drive assembly; 2: Primary adjustable support assembly; 3: Equivalent pressurization support assembly; 4: Elastic molding strip; 5: Grinding block; 6: Lifting frame; 11: Multi-directional translation mechanism; 12: Rotary drive unit; 13: Mounting platform; 21: Telescopic support rod; 22: First limiting frame; 221: First limiting support column; 222: First limiting frame plate; 31: Equivalent pressure supply body; 32: Equivalent support column; 33: Air guide connecting pipe; 34: Constant pressure regulating unit; 35: Second limiting frame; 311: Air storage shell; 312: Inflation unit; 321: Column cylinder; 322: Column rod; 323: Adjusting plate; 324: Sealing ring; 341: Inflation cylinder; 342: Piston body; 343: Pressure regulating rod; 344: Mounting plate; 345: Corner connecting pipe; 351: Second limiting support column; 352: Second limiting frame plate. Detailed Implementation

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] The technical solutions provided by this utility model will be described in detail below with reference to the accompanying drawings and through embodiments. It should be noted that the descriptions of these embodiments are intended to aid in understanding this utility model, but do not constitute a limitation thereof. In some examples, because some implementation methods belong to existing or conventional technology, they are not described or are not described in detail.

[0023] The following is a detailed explanation with reference to the accompanying drawings.

[0024] Example 1

[0025] This application provides a multi-point equivalent grinding head for aerospace sheet metal, which includes a grinding drive assembly 1, a primary adjustable support assembly 2, an equivalent pressure support assembly 3, an elastic forming strip 4, a grinding block 5, and a lifting frame 6.

[0026] according to Figure 1-3In one specific embodiment shown, the grinding drive assembly 1 is mounted on the lifting frame 6 of the worktable. A primary adjustable support assembly 2, capable of pre-adjusting the relative height of several support points according to the surface contour of the aerospace sheet metal, is mounted on the mounting platform 13 of the grinding drive assembly 1. An equivalent pressure support assembly 3 is connected to the end of the primary adjustable support assembly 2 away from the mounting platform 13. An elastically molded strip 4, adjustable in shape to fit the surface contour of the aerospace sheet metal, is connected to the end of the equivalent pressure support assembly 3 away from the primary adjustable support assembly 2. Several grinding blocks 5, adaptively and equivalently abutting against the surface of the aerospace sheet metal, are also staggered and interlocked on the surface of the elastically molded strip 4. The primary adjustable support component 2 provided in this application can be adjusted at different heights at different points according to the actual outline of the aerospace sheet metal, so that the elastic molding strip 4 can be roughly shaped to match the surface shape of the aerospace sheet metal. Furthermore, the equivalent pressure support component 3 can provide the elastic molding strip 4 with a multi-point, equally sized positioning support force, allowing several grinding blocks 5 on the surface of the elastic molding strip 4 to be pressed against the surface of the aerospace sheet metal with equal pressure. This results in equal grinding force and intensity across multiple areas during translation, ensuring uniformity and consistency in grinding effect, effectively improving the overall grinding quality. The primary adjustable support component 2 and the equivalent pressure support component 3 provided in this application can cooperate to form a reconfigurable staggered matrix grinding structure, enabling simultaneous equivalent grinding of non-flat surfaces on multiple areas using multiple grinding blocks 5 with positional differences. This improves grinding efficiency while ensuring uniformity, increasing grinding speed and shortening the grinding cycle during batch processing, thus enhancing production efficiency. This application uses a staggered array of grinding blocks 5 to perform arc surface grinding, which improves the coverage and uniformity of grinding.

[0027] Preferably, the grinding drive assembly 1 includes a multi-directional translation mechanism 11, a rotary drive unit 12, and a mounting table 13. Preferably, the multi-directional translation mechanism 11 is detachably mounted on the moving end of the lifting frame 6 for initial positioning and lifting movements as needed. More preferably, the moving end of the multi-directional translation mechanism 11 is connected to a rotary drive unit 12 capable of driving the grinding structure to rotate and achieve rotary grinding. More preferably, a mounting table 13 for mounting the grinding structure is provided on the rotation axis of the rotary drive unit 12. More preferably, the multi-directional translation mechanism 11 can be a GTS series translation table or an 8MTL direct-drive translation table. More preferably, the rotary drive unit 12 can be a grinding motor with adjustable grinding speed, such as NAKANISHI EV410-230 or S1P-FF04-180. Specifically, during the processing, the multi-directional translation mechanism 11 can drive the grinding structure to reciprocate laterally and / or longitudinally, enabling the grinding structure, which is in pressure contact with multiple points on the aerospace sheet, to perform equivalent grinding on multiple areas of the sheet surface, thereby improving grinding uniformity, effect, and quality. Specifically, when grinding is required on the contours of the sheet surface such as arc surfaces or parabolic surfaces, the rotary drive unit 12 drives the grinding structure to perform grinding motion at a station determined by the midpoint, thereby efficiently completing the synchronous grinding of multiple areas of the arc surfaces or parabolic surfaces, improving the overall grinding efficiency and quality.

[0028] Preferably, the primary adjustable support assembly 2 includes multiple telescopic support rods 21 and a first limiting frame 22. Specifically, the multiple telescopic support rods 21 are dot-matrix supported on the mounting platform 13, and a first limiting frame 22 is provided on the mounting platform 13 to fit over the telescopic support rods 21 and limit the relative positions between the telescopic support rods 21. Preferably, the telescopic support rods 21 can be DYTP type electro-hydraulic actuators, which integrate a hydraulic self-locking mechanism to achieve precise fixed-point support, and also have advantages such as a large thrust range, overload protection, and stepless speed regulation. Preferably, the first limiting frame 22 includes a first limiting support column 221 and a first limiting frame plate 222. More preferably, the multiple first limiting support columns 221 are connected to the corners of the first limiting frame plate 222 to suspend the first limiting frame plate 222 directly below the mounting platform 13. More preferably, the multiple telescopic support rods 21 are inserted into the first limiting frame plate 222. Specifically, the first limiting frame plate 222 is fixedly fitted onto the outer sleeve of the telescopic support rod 21 to ensure the stability of the connection. The primary adjustable support assembly 2 provided in this application can drive multiple telescopic support rods 21 to independently extend and retract to different lengths as needed, ensuring that the different rods cooperate to construct a curved support profile. This allows the elastically formed strip plate 4 to be bent into a non-straight surface adapted to the aerospace sheet metal, so that several grinding blocks 5 can press against the surface of the aerospace sheet metal with equal pressure. The first limiting frame 22 provided in this application can improve the stability of the telescopic support rod 21 during translational movement during grinding, ensuring grinding accuracy and quality.

[0029] Preferably, the equivalent pressurization assembly 3 includes an equivalent pressure supply body 31, an equivalent support column 32, an air guide pipe 33, a constant pressure regulating unit 34, and a second limiting frame 35. Preferably, the equivalent pressure supply body 31 is installed on the side edge of the first limiting frame plate 222. Preferably, the equivalent support column 32 is installed at the end of the telescopic support rod 21 away from the mounting platform 13, corresponding to the telescopic support rod 21. More preferably, the equivalent support column 32 is connected to the equivalent pressure supply body 31 through the air guide pipe 33. Preferably, a constant pressure regulating unit 34 is also connected to the side of the equivalent pressure supply body 31. Preferably, a second limiting frame 35, capable of defining the relative positions of a plurality of mutually parallel equivalent support columns 32 within the same cross-section, is also supported on the first limiting frame plate 222. The equivalent pressure supply body 31 provided in this application can provide multiple points of the same downward pressure when supporting the array of points on the elastic molding strip 4. This ensures that the grinding pressure provided by any grinding block 5 on the elastic molding strip 4 that contacts the aerospace sheet is equal, thus ensuring that the grinding intensity and grinding effect in different areas can be kept consistent, achieving high-quality uniform grinding. The equivalent support column 32 provided in this application can effectively transmit the force output by the equivalent pressure supply body 31 to the elastic molding strip 4, ensuring that each support point of the elastic molding strip 4 has equal support strength, so as to maintain the uniform pressure intensity while maintaining the arc shape. The constant pressure adjustment unit 34 provided in this application can pressurize or depressurize the equivalent pressure supply body 31 by adding or removing air when the internal air pressure changes due to the change in the shape of the aerospace sheet surface. This ensures that the equivalent pressure supply body 31 is maintained in a stable internal pressure state, so as to ensure that the provided pressure is constant and that the entire non-flat surface of the aerospace sheet is ground with equal effectiveness. In particular, the constant pressure regulating unit 34 can continuously feed a small amount to compensate for the wear of the grinding block 5 during the grinding process, ensuring that the friction force remains constant and the grinding intensity and force are stable and effective.

[0030] Preferably, the gas storage shell 311 of the equivalent pressure supply body 31 is detachably mounted on the side edge of the first limiting frame plate 222. More preferably, multiple air guide pipes 33 are spaced apart on the side of the gas storage shell 311 facing the equivalent support column 32. Preferably, an inflation unit 312 capable of inflating and pressurizing its cavity and a constant pressure regulating unit 34 capable of real-time regulating the air pressure in its cavity are installed on the surface of the gas storage shell 311 away from the air guide pipes 33. Preferably, the inflation unit 312 can be an AirTAC-AR series pneumatic booster pump. Preferably, a one-way air intake valve is also provided in the air inlet connecting the equivalent pressure supply body 31 and the inflation unit 312. Preferably, an exhaust port is opened on the surface of the equivalent pressure supply body 31, and an exhaust solenoid valve is also inserted in the exhaust port. Preferably, the gas storage housing 311 is also provided with a gas pressure sensor unit that can monitor the gas pressure and provide data feedback, so as to set the initial gas pressure according to the monitoring data and adjust the movement of the pressure regulating rod 343 according to the monitoring data during subsequent operation, so as to ensure the stability of the internal pressure of the equivalent pressure supply body 31.

[0031] Preferably, the equivalent support column 32 includes a column cylinder 321, a column rod 322, an adjusting plate 323, and a sealing ring 324. Preferably, the column cylinder 321 is mounted on the telescopic support rod 21. More preferably, the column rod 322 is inserted into the end of the column cylinder 321 away from the telescopic support rod 21. Preferably, the end of the column rod 322 inserted into the column cylinder 321 is connected to an adjusting plate 323 that is adapted to the cross-section of the cylinder cavity of the column cylinder 321. More preferably, sealing rings 324 are provided on the side edge of the adjusting plate 323 and in the insertion port of the column cylinder 321. Specifically, a number of columns 322 are arranged in a dot matrix pattern, with the end of the column away from the column cylinder 321 hinged to the elastic forming strip 4 in a multi-directional rotation. Thus, under the pre-lifting and lowering adjustment of the primary adjustable support component 2 and the pressurizing and telescopic adjustment of the equivalent pressurizing component 3, the elastic forming strip 4 can be reconfigured to form a plate shape that matches the surface contour of the aerospace sheet material. A number of grinding blocks 5 are equivalently pressed onto the surface of the aerospace sheet material with equal pressure.

[0032] Preferably, the constant pressure regulating unit 34 includes an air cylinder 341, a piston body 342, a pressure regulating rod 343, a mounting plate 344, and a corner connecting pipe 345. Preferably, the air guide end of the air cylinder 341 is connected to the air storage shell 311 through the corner connecting pipe 345. More preferably, a piston body 342 capable of changing the size of its air storage cavity is also provided inside the air cylinder 341. Preferably, the piston body 342 is also connected to the pressure regulating rod 343. More preferably, the bottom end of the pressure regulating rod 343 is connected to the mounting plate 344 installed on the outer side of the air storage shell 311 to position the working position of the pressure regulating rod 343, so that the piston body 342 changes its working position in the air cylinder 341 by the extension and retraction of the pressure regulating rod 343, thereby regulating the gas in the cavity of the air storage shell 311 connected to the air cylinder 341. Preferably, the pressure adjusting rod 343 can be a hydraulic push rod of the QD25 series, HDS-10S / ARN, or similar models. Specifically, during the grinding process, the pressure adjusting rod 343 can adjust the working position of the piston body 342 in the air cylinder 341 in real time according to the air pressure changes in the air storage shell 311, thereby ensuring that the air pressure in the air storage shell 311 is always kept constant, so as to maintain the stability of the grinding force on the grinding surface and thus obtain uniform equivalent grinding.

[0033] Preferably, the second limiting support column 351 of the second limiting frame 35 is supported on the first limiting frame plate 222. Preferably, multiple second limiting support columns 351 are connected to the corners of the second limiting frame plate 352. Preferably, the second limiting frame plate 352 is fitted onto the column cylinder 321. The second limiting frame 35 provided in this application can improve the stability of the multi-segment rod structure during lateral movement, ensure the smoothness of grinding movement, and reduce grinding fluctuations.

[0034] Preferably, the surface of the elastic molded strip 4 is fitted with grinding blocks 5 arranged in a staggered lattice pattern. Preferably, the elastic molded strip 4 can be made of a shape memory material with high plasticity, such as a plastic elastomer made of styrene-based materials (SBS), polyurethane (TPU), or a composite board made of multiple layers of metal and non-metal, so that it can be constructed into a continuous arc surface with the same surface shape as the aerospace sheet by multi-point positioning, and it can also restore the initial shape of the board when the positioning is released, so as to construct a continuous arc surface with different inclination curvature by secondary positioning with different lattice patterns.

[0035] Preferably, the lifting frame 6 can be a portal frame or suspension system capable of lifting the grinding structure as a whole. Specifically, the lifting frame 6 can be an industrial gantry frame, which mainly includes a support frame and lifting suspension columns.

[0036] Preferably, the electrical components such as the multi-directional translation mechanism 11, the rotary drive unit 12, the telescopic support rod 21, the inflation unit 312, and the pressure regulating rod 343 provided in this application are all electrically connected to the controller and the power supply. The control method of this application is controlled by the controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, this utility model is only used to protect the mechanical device and its mechanical structural features. Therefore, this utility model will not explain the control method and circuit connection in detail.

[0037] Example 2

[0038] In a preferred embodiment, the elastically molded strip 4 has several fitting grooves on its surface. The grinding block 5 is fitted into the fitting grooves by a rubber sleeve on its surface. When the grinding block 5 comes into contact with the surface of the aerospace sheet, it tilts to a certain extent to ensure effective contact. This tilting can be achieved by compressing the rubber sleeve to cause deformation. After grinding, the rubber sleeve recovers its deformation, allowing the grinding block 5 to effectively adapt to aerospace sheets with different tilt angles. In particular, the grinding block 5 provided in this application has a sufficiently small surface area, so that the area in actual contact between the aerospace sheet and the grinding block 5 is limited to a small range. The small area of ​​the aerospace sheet with a large arc surface can approximate the tilted plane, thereby ensuring sufficient contact and fit during grinding.

[0039] This utility model is not limited to the above-described optional embodiments. Anyone can derive other various forms of products under the guidance of this utility model. However, regardless of any changes in shape or structure, any technical solution falling within the scope of the claims of this utility model is within the protection scope of this utility model. Those skilled in the art should understand that this utility model specification and its drawings are illustrative and do not constitute a limitation on the claims. The protection scope of this utility model is defined by the claims and their equivalents. Throughout the text, features introduced by "preferred" are merely optional and should not be construed as mandatory. Therefore, the applicant reserves the right to abandon or delete relevant preferred features at any time.

Claims

1. A multi-point equivalent grinding head for aerospace sheet metal, comprising a grinding drive assembly (1) mounted on a lifting frame (6) on a worktable, characterized in that, A primary adjustable support assembly (2) is installed on the mounting platform (13) of the grinding drive assembly (1), which is capable of pre-adjusting the relative height of several support points according to the surface profile of the aerospace sheet metal. The primary adjustable support assembly (2) is connected to an equivalent pressure support assembly (3) at one end away from the mounting platform (13), and the equivalent pressure support assembly (3) is connected to an elastically molded strip (4) at one end away from the primary adjustable support assembly (2), which is adjustable to fit the surface profile of the aerospace sheet. The surface of the elastic molded strip (4) is also staggered with a number of grinding blocks (5) that are adapted to and equivalent to abut against the surface of the aerospace sheet.

2. The multi-point equivalent grinding head for aerospace sheet metal as described in claim 1, characterized in that, The primary adjustable support assembly (2) has multiple telescopic support rods (21) dotted on the mounting platform (13), and the mounting platform (13) is provided with a first limiting frame (22) that can be sleeved on the telescopic support rods (21) to limit the relative positions between the telescopic support rods (21).

3. The multi-point equivalent grinding head for aerospace sheet metal as described in claim 2, characterized in that, The first limiting frame (22) includes a first limiting support column (221) and a first limiting frame plate (222), wherein, Multiple first limiting support columns (221) are connected to the first limiting frame plate (222) at the corner of the plate surface to suspend the first limiting frame plate (222) directly below the mounting platform (13), and a number of telescopic support rods (21) are inserted into the first limiting frame plate (222).

4. The multi-point equivalent grinding head for aerospace sheet metal as described in claim 3, characterized in that, The equivalent pressurization support assembly (3) includes an equivalent pressure supply body (31), an equivalent support column (32), an air guide connecting pipe (33), a constant pressure regulating unit (34), and a second limiting frame (35), wherein, The equivalent support column (32) is installed at the end of the telescopic support rod (21) away from the mounting platform (13) in a manner corresponding to the telescopic support rod (21), and the equivalent support column (32) is connected to the equivalent pressure supply body (31) through the air guide pipe (33); The constant pressure regulating unit (34) is also connected to the side of the equivalent pressure supply body (31). The first limiting frame plate (222) is also supported by a second limiting frame (35) which can limit the relative positions of a plurality of mutually parallel equivalent support columns (32) in the same cross section.

5. The multi-point equivalent grinding head for aerospace sheet metal as described in claim 4, characterized in that, The gas storage shell (311) of the equivalent pressure supply body (31) is detachably installed on the side edge of the first limiting frame plate (222), and the gas storage shell (311) is connected to a plurality of gas guide pipes (33) at intervals on the side facing the equivalent support column (32). An inflation unit (312) and a constant pressure regulating unit (34) are installed on the surface of the gas storage shell (311) away from the gas connecting pipe (33).

6. The multi-point equivalent grinding head for aerospace sheet metal as described in claim 5, characterized in that, The equivalent support column (32) includes a column cylinder (321), a column rod (322), an adjusting plate (323), and a sealing ring (324), wherein, The column tube (321) is mounted on the telescopic support rod (21), and the column rod (322) is inserted at one end away from the telescopic support rod (21). The end of the column rod (322) inserted into the column tube (321) is connected to the adjusting plate (323) which is adapted to the cross-section of the cylinder cavity of the column tube (321). The sealing ring (324) is provided on the side edge of the adjusting plate (323) and in the insertion port of the column tube (321).

7. The multi-point equivalent grinding head for aerospace sheet metal as described in claim 6, characterized in that, Several of the column rods (322) are connected to the elastic molded strip (4) at one end away from the column cylinder (321) in a dot matrix distribution.

8. The multi-point equivalent grinding head for aerospace sheet metal as described in claim 7, characterized in that, The constant pressure regulating unit (34) includes an air cylinder (341), a piston body (342), a pressure regulating rod (343), a mounting plate (344), and a corner connecting pipe (345), wherein, The air guide end of the air cylinder (341) is connected to the air storage shell (311) through the corner connecting pipe (345), and a piston body (342) capable of changing the size of its air storage cavity is also provided inside the air cylinder (341). The piston body (342) is also connected to the pressure regulating rod (343), and the bottom end of the pressure regulating rod (343) is connected to the mounting plate (344) installed on the outer side of the gas storage housing (311).

9. The multi-point equivalent grinding head for aerospace sheet metal as described in claim 8, characterized in that, The second limiting support column (351) of the second limiting frame (35) is supported on the first limiting frame plate (222), and multiple second limiting support columns (351) are connected to the corners of the second limiting frame plate (352); The second limiting frame plate (352) is fitted onto the column (321).

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