Grinding device for aerospace parts

Abstract

The invention relates to the field of high-precision workpiece grinding, and provides a grinding device for aerospace parts, which comprises a planet wheel, a lower grinding assembly and an upper grinding assembly, the lower grinding assembly comprises a grinding seat, a lower grinding disc, a sun gear, an inner gear ring, a first rotating shaft and a first driving unit; clamping grooves are formed in the tops of the first rotating shafts; the sun gear is arranged on the first rotating shaft; the planet gear is placed on the lower grinding disc and meshed with the sun gear and the inner gear ring. The first driving unit is respectively connected with the inner gear ring and the first rotating shaft and is used for driving the inner gear ring and the first rotating shaft to rotate in opposite directions; the upper grinding assembly comprises a first lifting unit, a second lifting unit, a second driving unit, an upper grinding disc, a connecting frame and a clamping block; the connecting frame is connected with the top of the upper millstone; the second driving unit is used for driving the connecting frame to rotate; the second lifting unit is used for driving the clamping block to ascend and descend so that the clamping block can be clamped with or disengaged from the clamping groove. The double-sided grinding device solves the problem that the double-sided grinding device is poor in grinding effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of high-precision workpiece grinding, in particular to a grinding device for aerospace parts. BACKGROUND

[0002] In the field of aerospace, the manufacturing precision and surface quality of parts play a crucial role in the performance and safety of aircraft. With the continuous development of aerospace technology, the quality requirements for parts are becoming higher and higher. Grinding, as an important processing technology, can effectively improve the surface finish and dimensional accuracy of parts, thereby meeting the high quality requirements of aerospace parts. Double-sided grinding equipment can grind both sides of the workpiece at the same time, with high grinding efficiency, and is therefore widely favored.

[0003] The traditional double-sided grinding device grinds in the following way: a mold with a workpiece installed is fixed on a fixed part shaped like a planetary wheel, the fixed part is placed between the upper and lower grinding discs, a sun gear is set up with the fixed part to form a planetary gear structure, and the fixed part is driven to rotate and revolve, thereby causing the workpiece to rub against the upper and lower grinding discs. At the same time, some grinding devices also drive the upper and lower grinding discs to rotate simultaneously, thereby enhancing the grinding effect. However, driving the fixed part and the upper and lower grinding discs to rotate simultaneously requires multiple power sources, and currently the upper grinding disc is usually connected to the middle part of the upper grinding disc by a cylinder or other components to drive the upper grinding disc to rise and fall, resulting in the need to position the upper grinding disc each time to adjust the height of the upper grinding disc.

[0004] To solve the above problems, there is currently a grinding device that directly places the upper grinding disc on the workpiece and then drives the fixed part and the upper and lower grinding discs to rotate simultaneously through a first rotating shaft and a transmission structure. However, this transmission structure is relatively complex, and this transmission method, although reducing the number of power sources, also causes the relative rotational speed and direction between the fixed part and the upper and lower grinding discs to be fixed, while the grinding requirements for the front and back surfaces of the workpiece may not be the same in practice, making it difficult to meet the grinding requirements. Moreover, the upper grinding disc is directly placed on the workpiece, causing the pressure on the workpiece to depend directly on the weight of the upper grinding disc, making it difficult to guarantee the grinding effect and the levelness of the upper grinding disc. SUMMARY

[0005] To solve the problem of poor grinding effect of traditional double-sided grinding devices, the present application provides a grinding device for aerospace parts.

[0006] The grinding device for aerospace parts provided by the present application adopts the following technical solution: A grinding device for aerospace parts, comprising: a planetary wheel for fixing a workpiece; The lower grinding assembly comprises a grinding base, a lower grinding disc, a sun gear, an inner ring gear, a first rotating shaft and a first driving unit; the lower grinding disc and the inner ring gear are coaxially arranged and both are rotationally connected with the grinding base; the first rotating shaft penetrates through the middle part of the lower grinding disc and is connected with the lower grinding disc, the top of the first rotating shaft is provided with a clamping groove; the sun gear is sleeved on the first rotating shaft; the planetary gears are placed on the lower grinding disc and are respectively engaged with the sun gear and the inner ring gear; the first driving unit is connected with the inner ring gear and the first rotating shaft respectively and is used for driving the inner ring gear and the first rotating shaft to rotate in opposite directions; The upper grinding assembly comprises a first lifting unit, a second lifting unit, a second driving unit, an upper grinding disc, a connecting frame and a clamping block; the connecting frame is connected with the top of the upper grinding disc; the clamping block is slidably arranged on the connecting frame; the second driving unit is slidably connected with the connecting frame and is used for driving the connecting frame to rotate; the first lifting unit is connected with the second driving unit and is used for driving the second driving unit and the connecting frame to lift; the second lifting unit is connected with the clamping block and is used for driving the clamping block to lift; When the clamping block descends, the clamping block can be clamped into the clamping groove and press downward on the upper grinding disc; When the clamping block ascends, the clamping block can be disengaged from the clamping groove.

[0007] By adopting the above technical scheme, the planetary gears can fix the workpiece, the first driving unit drives the inner ring gear and the first rotating shaft to rotate in opposite directions, the planetary gears can high-speed rotate, the upper grinding disc and the lower grinding disc can also rotate and grind the workpiece, in addition, by arranging the inner ring gear and the first rotating shaft, the planetary gears can revolve around the sun gear, thereby improving the grinding effect; the second lifting unit can drive the clamping block to lift, when the clamping block is clamped with the clamping groove, the first driving unit can drive the upper grinding disc, the lower grinding disc and the planetary gears to rotate, and by making the clamping block press downward on the upper grinding disc, the grinding pressure can be adjusted; when the clamping block is disengaged from the clamping groove, the second driving unit can drive the upper grinding disc to rotate, thereby the rotating speed and direction of the upper grinding disc and the lower grinding disc can be independently controlled.

[0008] Optionally, the sun gear and the inner ring gear are configured to make the planetary gears revolve around the sun gear and the rotating direction is opposite to that of the first rotating shaft.

[0009] By adopting the above technical scheme, the planetary gears can revolve around the sun gear and the rotating direction is opposite to that of the first rotating shaft, the revolving direction of the planetary gears is opposite to that of the upper grinding disc and the lower grinding disc, the relative movement distance between the workpiece and the upper grinding disc and the lower grinding disc is larger, and the grinding effect is improved.

[0010] Optionally, the first driving unit comprises a first driving motor, a first gear, a second gear, a third gear, a second rotating shaft and a sleeve. The sleeve is sleeved on the first rotating shaft and rotationally connected with the first rotating shaft, and the sleeve is connected with the inner gear ring. The first gear is sleeved on the sleeve, the second gear is sleeved on the first rotating shaft, and the third gear is engaged with the first gear and the second gear respectively, and the first driving motor is drivingly connected with the third gear through the second rotating shaft.

[0011] By adopting the above technical scheme, the first driving unit is composed of the first driving motor, the first gear, the second gear, the third gear, the second rotating shaft and the sleeve, the sleeve is sleeved on the first rotating shaft and rotationally connected with the first rotating shaft and connected with the inner gear ring, the first gear is sleeved on the sleeve, the second gear is sleeved on the first rotating shaft, the third gear is engaged with the first gear and the second gear, and the first driving motor is drivingly connected with the third gear through the second rotating shaft, which can realize the rotation of the inner gear ring and the first rotating shaft in opposite directions, provide power for the operation of the grinding device, and enable the planetary gear to realize corresponding revolution and high-speed rotation under the cooperation of the sun gear and the inner gear ring, thereby realizing efficient grinding of the workpiece.

[0012] Optionally, the second driving unit comprises a second driving motor, a third rotating shaft and a first mounting frame, the third rotating shaft vertically penetrates the connecting frame and is slidingly connected with the connecting frame, the third rotating shaft is not circular in cross section, the first mounting frame is connected with the first lifting unit, the second driving motor is arranged on the first mounting frame, and the second driving motor is connected with the third rotating shaft.

[0013] By adopting the above technical scheme, the third rotating shaft is vertically and slidingly connected with the connecting frame, so that when the upper grinding disc is placed on the workpiece, the second driving unit can also move up and down, avoiding damage to the first lifting unit, and vice versa, the first lifting unit can quickly place the upper grinding disc on the workpiece without precise positioning.

[0014] Optionally, the first lifting unit comprises a first air cylinder, the first air cylinder is vertically arranged and connected with the first mounting frame, and a limiting block is arranged below the third rotating shaft.

[0015] By adopting the above technical scheme, the first air cylinder drives the first mounting frame to lift, thereby driving the second driving unit and the connecting frame to lift, realizing the lifting of the upper grinding disc, and the limiting block can prevent the third rotating shaft from being separated from the connecting frame, ensuring that the first air cylinder can normally drive the upper grinding disc to lift.

[0016] Optionally, the second lifting unit comprises a second cylinder and a second mounting frame; the second mounting frame is rotationally connected with the first mounting frame, and an axis of rotation of the second mounting frame is collinear with an axis of the third rotating shaft; the second cylinder is arranged on the second mounting frame, and a piston rod of the second cylinder is connected with the clamping block.

[0017] By adopting the above technical solution, the second cylinder is arranged on the second mounting frame and the piston rod is connected with the clamping block, so that the clamping block can be flexibly driven to lift, the clamping block and the top clamping groove of the first rotating shaft can be clamped and separated, and the upper grinding disc can be pressed down, thereby improving the grinding quality.

[0018] Optionally, a third cylinder is further arranged on the second mounting frame, and a piston rod of the third cylinder is arranged to abut against the upper grinding disc.

[0019] By adopting the above technical solution, the third cylinder is arranged vertically on the second mounting frame, and the piston rod thereof abuts against the upper grinding disc, so that additional pressure can be applied to the upper grinding disc, thereby changing the grinding pressure.

[0020] Optionally, a pressure sensor is arranged at the bottom of the clamping block.

[0021] By adopting the above technical solution, the pressure sensor is arranged at the bottom of the clamping block, so that the pressure when the clamping block is pressed down can be monitored in real time, thereby controlling the grinding pressure and improving the grinding quality of the aerospace parts.

[0022] Optionally, a plurality of clamping blocks are arranged, and the pressure sensor is arranged at the bottom of at least one of the clamping blocks.

[0023] By adopting the above technical solution, the plurality of clamping blocks can be more stably clamped into the clamping groove and pressed down on the upper grinding disc, the pressure sensor arranged at the bottom of the plurality of clamping blocks can detect the pressure of the clamping blocks on the clamping groove from multiple points, so that the pressure detection is more comprehensive and accurate, and the grinding pressure of each part can be accurately controlled; in addition, the pressure readings of the pressure sensors can assist in judging the levelness of the upper grinding disc.

[0024] In summary, the present application has at least one of the following beneficial technical effects: 1. The first driving unit drives the inner gear ring and the first rotating shaft to rotate in opposite directions, so that the planetary gear can rotate at high speed, and the upper grinding disc and the lower grinding disc can also rotate to grind the workpiece; when the clamping block is clamped with the clamping groove, the first driving unit can drive the upper grinding disc, the lower grinding disc and the planetary gear to rotate at the same time, and the grinding pressure can be adjusted by pressing the upper grinding disc with the clamping block; when the clamping block is separated from the clamping groove, the second driving unit can drive the upper grinding disc to rotate, so that the rotational speed and direction of the upper grinding disc and the lower grinding disc can be independently controlled; 2. The revolution direction of the planet wheel is opposite to the rotation direction of the upper and lower grinding discs, so that the relative movement distance between the workpiece and the upper and lower grinding discs is larger, and the grinding effect is increased; 3. The clamping block and the third air cylinder can press down the upper grinding disc to change the grinding pressure, and the grinding pressure of each part can be accurately controlled by cooperating with the pressure sensor, and the levelness of the upper grinding disc can be detected, so as to improve the grinding effect. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a perspective structural schematic diagram of one embodiment of the grinding device for aerospace parts provided by the present application; Figure 2 is an enlarged schematic diagram of position A in Figure 1 Figure 3 is a partial top view of the grinding device for aerospace parts provided by the present application; Figure 4 is a partial side view of the grinding device for aerospace parts provided by the present application; Figure 5 is a perspective structural schematic diagram of another embodiment of the grinding device for aerospace parts provided by the present application; Figure 6 is an enlarged schematic diagram of position B in Figure 5

[0026] BRIEF DESCRIPTION OF DRAWINGS 1. Planet wheel; 2. Lower grinding assembly; 21, grinding seat; 22, lower grinding disc; 23, sun gear; 24, inner ring gear; 25, first rotating shaft; 251, clamping groove; 26, first driving unit; 261, first driving motor; 262, first gear; 263, second gear; 264, third gear; 265, second rotating shaft; 266, sleeve; 3. Upper grinding assembly; 31, first lifting unit; 32, upper grinding disc; 33, connecting frame; 34, limiting block; 35, clamping block; 36, second lifting unit; 361, second air cylinder; 362, second mounting frame; 37, second driving unit; 371, third rotating shaft; 272, first mounting frame; 38, third air cylinder; 4. Liquid injection assembly; 41, liquid injection pipe; 42, liquid collecting disc; 43, communication pipe; 200, workpiece; 201, mold. DETAILED DESCRIPTION

[0027] The following will be described in detail in combination with the accompanying Figures 1 to 6 The present application will be further described in detail.

[0028] Example 1​​

[0029] As shown in Figures 1 to 4 The embodiment of the present application discloses a grinding device for aerospace parts, which comprises a planetary wheel 1, a lower grinding assembly 2, an upper grinding assembly 3 and a liquid injection assembly 4.

[0030] Specifically, the planetary wheel 1 is used for fixing a workpiece 200. For example, the planetary wheel 1 is provided with a clamping hole for placing the workpiece 200. For another example, the planetary wheel 1 is provided with a clamping hole for placing a mold 201, and the mold 201 is provided with a clamping hole for placing the workpiece 200.

[0031] The lower grinding assembly 2 comprises a grinding seat 21, a lower grinding disc 22, a sun gear 23, an inner ring gear 24, a first rotating shaft 25 and a first driving unit 26. The lower grinding disc 22 and the inner ring gear 24 are coaxially arranged and both are rotationally connected with the grinding seat 21. The first rotating shaft 25 vertically penetrates the middle part of the lower grinding disc 22 and is connected with the lower grinding disc 22, and the top of the first rotating shaft 25 is provided with a clamping groove 251. The sun gear 23 is sleeved on the first rotating shaft 25. The planetary wheel 1 is placed on the lower grinding disc 22 and is engaged with the sun gear 23 and the inner ring gear 24 respectively. The first driving unit 26 is connected with the inner ring gear 24 and the first rotating shaft 25 respectively and is used for driving the inner ring gear 24 and the first rotating shaft 25 to rotate in opposite directions.

[0032] The first driving unit 26 comprises a first driving motor 261, a first gear 262, a second gear 263, a third gear 264, a second rotating shaft 265 and a sleeve pipe 266. The sleeve pipe 266 is sleeved on the first rotating shaft 25 and is rotationally connected with the first rotating shaft 25, and the sleeve pipe 266 is connected with the inner ring gear 24. The first gear 262 is sleeved on the sleeve pipe 266, and the second gear 263 is sleeved on the first rotating shaft 25. The third gear 264 is engaged with the first gear 262 and the second gear 263 respectively, and the first driving motor 261 is in driving connection with the third gear 264 through the second rotating shaft 265. Wherein, the rotation directions of the inner ring gear 24 and the sun gear 23 are opposite, so that the planetary wheel 1 can be driven to rotate at high speed, and by setting the rotation speeds of the inner ring gear 24 and the sun gear 23, the planetary wheel 1 can revolve around the sun gear 23 while rotating. In the embodiment, the revolving direction of the planetary wheel 1 is opposite to the rotation direction of the first rotating shaft 25, so that the rotation directions of the upper grinding disc 32 and the lower grinding disc 22 are opposite to the revolving direction of the planetary wheel 1, which is helpful to improve the grinding speed.

[0033] The upper grinding assembly 3 comprises a first lifting unit 31, an upper grinding disc 32, a connecting frame 33, a limiting block 34 and a clamping block 35.

[0034] The first lifting unit 31 can be a first cylinder arranged vertically. The connecting frame 33 is arranged on the top of the upper grinding disc 32, and the connecting frame 33 is provided with a through hole through which a piston rod of the first cylinder passes. The limiting block 34 is arranged at the end of the piston rod of the first cylinder. The first cylinder can be driven to stretch and retract so as to drive the connecting frame 33 and the upper grinding disc 32 to lift and drop. The clamping block 35 is arranged on the upper grinding disc 32, and the clamping block 35 can be clamped in the clamping groove 251 on the first rotating shaft 25, so that the first driving unit 26 can drive the upper grinding disc 32 to rotate.

[0035] The liquid injection assembly 4 includes a liquid injection pipe 41, a liquid collecting disc 42 and a communication pipe 43. The liquid collecting disc 42 is connected with the upper grinding disc 32, the liquid injection pipe 41 communicates with the liquid collecting disc 42 and is used for guiding the grinding liquid into the liquid collecting disc 42. One end of the communication pipe 43 communicates with the liquid collecting disc 42, and the other end penetrates through the upper grinding disc 32. During grinding, the grinding liquid can enter between the upper grinding disc 32 and the lower grinding disc 22, thereby playing a role of cooling and flushing away debris.

[0036] Embodiment 2

[0037] The difference between the embodiment and the embodiment 1 is that: As shown in Figures 5 to 6 The upper grinding assembly 3 further includes a second lifting unit 36 and a second driving unit 37. The clamping block 35 is slidably arranged on the connecting frame 33.

[0038] The second driving unit 37 is slidably connected with the connecting frame 33 and is used for driving the connecting frame 33 to rotate; the first lifting unit 31 is connected with the second driving unit 37 and is used for driving the second driving unit 37 and the connecting frame 33 to lift and drop. The second lifting unit 36 is connected with the clamping block 35 and is used for driving the clamping block 35 to lift and drop.

[0039] Specifically, the second driving unit 37 includes a second driving motor, a third rotating shaft 371 and a first mounting frame 272. In the embodiment, the first cylinder is connected with the first mounting frame 272, the second driving motor is arranged on the first mounting frame 272, the third rotating shaft 371 penetrates through the connecting frame 33 vertically and is slidably connected with the connecting frame 33, and the top of the third rotating shaft 371 is in transmission connection with the second driving motor. The limiting block 34 is arranged at the bottom of the third rotating shaft 371. The third rotating shaft 371 is not circular in cross section, for example, can be square, so that the second driving motor can drive the connecting frame 33 and the upper grinding disc 32 to rotate through the third rotating shaft 371.

[0040] The second lifting unit 36 comprises a second cylinder 361 and a second mounting frame 362. The second mounting frame 362 is rotationally connected with the first mounting frame 272, and the rotation axis of the second mounting frame 362 is collinear with the axis of the third rotating shaft 371. The second cylinder 361 is arranged on the second mounting frame 362, and the piston rod of the second cylinder 361 is connected with the clamping block 35. The second cylinder 361 can drive the clamping block 35 to slide up and down, so that the clamping block 35 can be clamped with or separated from the clamping groove 251.

[0041] When the clamping block 35 is clamped with the clamping groove 251, the second driving motor is not operated, and the upper grinding disc 32, the lower grinding disc 22 and the planetary wheel 1 are all driven by the first driving unit 26.

[0042] When the clamping block 35 is separated from the clamping groove 251, the lower grinding disc 22 and the planetary wheel 1 are driven by the first driving unit 26, and the upper grinding disc 32 can be driven by the second driving motor, so that the relative rotating speed and the rotating direction of the upper grinding disc 32 and the lower grinding disc 22 can be independently controlled, so as to meet different grinding requirements.

[0043] Further, a plurality of third cylinders 38 are arranged on the second mounting frame 362, the third cylinders 38 are vertically arranged, and the piston rods of the third cylinders 38 are used to abut against the upper grinding disc 32. The third cylinders 38 can change the grinding pressure by pressing the upper grinding disc 32 downward, and the plurality of third cylinders 38 can accurately adjust the grinding pressure of each part, which is helpful to improve the grinding effect.

[0044] The number of the clamping blocks 35 is also multiple, and the bottom of the piston rod of each of the plurality of clamping blocks 35 and the plurality of third cylinders 38 is provided with a pressure sensor. The arrangement of the pressure sensor is helpful to accurately adjust the grinding pressure of each part, and the reading of the pressure sensor can assist in judging the levelness of the upper grinding disc 32. For example, when the top surface of the upper grinding disc 32 is horizontal, if the pressure values of the plurality of pressure sensors are equal, and the bottom heights of the plurality of clamping blocks 35 and the plurality of third cylinders 38 are different, it indicates that the upper grinding disc 32 is not in a horizontal state. Conversely, when the bottom heights of the plurality of clamping blocks 35 and the plurality of third cylinders 38 are the same, and the pressure values of the plurality of pressure sensors are different, it indicates that the upper grinding disc 32 is not in a horizontal state.

[0045] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the basis of the structure, shape and principle of the present application should be covered into the protection scope of the present application.

Claims

1. A grinding apparatus for aerospace components, characterized in that, include: Planetary gear (1) is used to fix the workpiece (200); The lower grinding assembly (2) includes a grinding seat (21), a lower grinding disc (22), a sun gear (23), an internal gear ring (24), a first rotating shaft (25), and a first drive unit (26). The lower grinding disc (22) and the internal gear ring (24) are coaxially arranged and both are rotatably connected to the grinding seat (21). The first rotating shaft (25) vertically passes through the middle of the lower grinding disc (22) and is connected to the lower grinding disc (22). The top of the first rotating shaft (25) is provided with a slot (251). The sun gear (23) is sleeved on the first rotating shaft (25). The planetary gear (1) is placed on the lower grinding disc (22) and meshes with the sun gear (23) and the internal gear ring (24) respectively. The first drive unit (26) is connected to the internal gear ring (24) and the first rotating shaft (25) respectively, and is used to drive the internal gear ring (24) and the first rotating shaft (25) to rotate in opposite directions. The upper grinding assembly (3) includes a first lifting unit (31), a second lifting unit (36), a second driving unit (37), an upper grinding disc (32), a connecting frame (33), and a locking block (35); the connecting frame (33) is connected to the top of the upper grinding disc (32); the locking block (35) is slidably disposed on the connecting frame (33); the second driving unit (37) is slidably connected to the connecting frame (33) and is used to drive the connecting frame (33) to rotate; the first lifting unit (31) is connected to the second driving unit (37) and is used to drive the second driving unit (37) and the connecting frame (33) to rise and fall; the second lifting unit (36) is connected to the locking block (35) and is used to drive the locking block (35) to rise and fall; When the locking block (35) descends, the locking block (35) can be locked into the locking slot (251) and press down on the upper grinding disc (32); When the card block (35) rises, the card block (35) can disengage from the card slot (251); The sun gear (23) and the internal gear ring (24) are configured such that the planetary gear (1) revolves around the sun gear (23) in a direction opposite to the rotation direction of the first rotating shaft (25); The second drive unit (37) includes a second drive motor, a third rotating shaft (371), and a first mounting bracket (272); the third rotating shaft (371) vertically passes through the connecting bracket (33) and is slidably connected to the connecting bracket (33), and the cross-section of the third rotating shaft (371) is not circular; the first mounting bracket (272) is connected to the first lifting unit (31); the second drive motor is mounted on the first mounting bracket (272) and is connected to the third rotating shaft (371); The first lifting unit (31) includes a first cylinder, which is vertically arranged and connected to the first mounting bracket (272); a limiting block (34) is provided below the third rotating shaft (371). The second lifting unit (36) includes a second cylinder (361) and a second mounting bracket (362); the second mounting bracket (362) is rotatably connected to the first mounting bracket (272), and the rotation axis of the second mounting bracket (362) is collinear with the axis of the third rotating shaft (371); the second cylinder (361) is located on the second mounting bracket (362), and the piston rod of the second cylinder (361) is connected to the locking block (35); The number of the card block (35) and the second cylinder (361) are both multiple; At least one of the card blocks (35) has a pressure sensor on its bottom.

2. The grinding apparatus for aerospace components according to claim 1, characterized in that: The first drive unit (26) includes a first drive motor (261), a first gear (262), a second gear (263), a third gear (264), a second rotating shaft (265), and a sleeve (266). The sleeve (266) is sleeved on the first rotating shaft (25) and rotatably connected to the first rotating shaft (25). The sleeve (266) is connected to the internal gear ring (24). The first gear (262) is sleeved on the sleeve (266); the second gear (263) is sleeved on the first rotating shaft (25); the third gear (264) meshes with the first gear (262) and the second gear (263) respectively, and the first drive motor (261) is connected to the third gear (264) through the second rotating shaft (265).

3. The grinding apparatus for aerospace components according to claim 1, characterized in that: The second mounting bracket (362) is also provided with a third cylinder (38), which is vertically arranged and its piston rod is used to abut against the upper grinding disc (32).

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