Grinding device for aero-engine blade

Abstract

The invention provides an aero-engine blade grinding device, and relates to the technical field of grinding and polishing equipment, the aero-engine blade grinding device comprises a vibration disc, the vibration disc is internally provided with a grinding cavity with an upward opening, and the grinding cavity is used for containing grinding particles; a vibration device is arranged on the vibration disc and used for driving the vibration disc to vibrate, a vibration buffering device is arranged on the lower side of the vibration disc, a vibration area is arranged in the vibration buffering device, and the vibration device is arranged on the lower side of the vibration disc and located in the vibration area. The grinding chamber is arranged on the base, so that the engine blade can be placed in the grinding chamber and ground; the aero-engine blade grinding device has the beneficial effects that the vibration device is arranged on the lower side of the vibration disc, so that a center column does not need to be arranged in the grinding cavity, the grinding cavity in the vibration disc is wider than a grinding space of a grinding machine in the prior art, and then the aero-engine blade grinding device can grind aero-engine blades.

Description

Technical Field

[0001] The invention relates to the technical field of grinding and polishing equipment, in particular to a grinding device for aircraft engine blades. Background Art

[0002] There are a large number of blades in an aircraft engine, which are the core parts of the aircraft engine. The quality of the blades directly affects the performance and life of the engine. Blade grinding and polishing is an important process to improve the service life, fatigue strength and aerodynamic performance of the blades. In my country, due to the relatively backward grinding technology and grinding equipment, as well as the difficulty of machining workpieces with complex geometric surfaces, the grinding of such workpieces (such as special-shaped workpieces such as aircraft engine blades) was mostly done by hand-held machining tools or workpieces. Although this method can complete the grinding and polishing of complex curved surfaces to a certain extent, the machining quality varies due to the operator's own conditions, which often leads to difficult quality control of the processed workpieces, low precision, poor surface quality, and difficult to ensure product consistency.

[0003] Therefore, it is considered to use a grinding device to grind and polish the aircraft engine blades. However, the existing grinding devices usually have the following defects, which makes the existing grinding devices unsuitable for grinding and processing aircraft engine blades: 1. The existing grinding device is usually provided with a transmission cylinder inside the grinding bucket, and the grinding groove is an annular groove surrounding the side wall of the transmission cylinder. However, the size of the aircraft engine blade is relatively large (the diameter is usually 20cm-130cm), so that the grinding bucket of the existing grinding device cannot have enough space to accommodate the aircraft engine blade and perform grinding and polishing. Summary of the invention

[0004] The purpose of the present invention is to provide a blade grinding device for an aircraft engine to solve the technical problems pointed out in the above background technology.

[0005] The present invention is achieved through the following technical solutions.

[0006] A device for grinding blades of aircraft engines comprises a vibration plate, wherein a grinding chamber with an upward opening is arranged in the vibration plate, and the grinding chamber is used to contain grinding particles; a vibration device is arranged on the vibration plate to drive the vibration plate to vibrate, and a vibration buffer device is arranged on the lower side of the vibration plate, wherein a vibration zone is arranged in the vibration buffer device, and the vibration device is arranged on the lower side of the vibration plate and located in the vibration zone, so that the engine blades can be placed in the grinding chamber and ground.

[0007] As a further improvement of the present invention, the vibration buffer device includes a plurality of vibration springs arranged in a ring array on the lower side of the vibration plate, and the space surrounded by each of the vibration springs forms the vibration zone.

[0008] As a further improvement of the present invention, the vibration device includes a vibration cylinder arranged on the lower side of the vibration disk and located in the vibration area, and a vibration motor is arranged in the vibration cylinder, wherein the vibration cylinder and the vibration disk are detachably connected.

[0009] As a further improvement of the present invention, a connecting plate is arranged around the side wall of the vibration cylinder, and a plurality of connecting columns are arranged at the lower end of the vibration plate, and each of the connecting columns is detachably connected to the connecting plate.

[0010] As a further improvement of the present invention, the upper end of the vibration spring is connected to the lower end surface of the connecting disk, the connecting columns are arranged in a ring array on the lower side of the vibration disk and the lower ends of the connecting columns are connected to the upper end surface of the connecting disk, and the connecting columns and the vibration springs are arranged in an interval with each other.

[0011] As a further improvement of the present invention, an upper protective cylinder is provided at the bottom of the vibration disk and located on the upper side of the vibration cylinder, and the eccentric block at the upper end of the vibration motor is inserted into the upper protective cylinder along a first preset direction, wherein the upper protective cylinder is fixedly arranged at the bottom of the vibration disk, and there is a movable gap between the upper protective cylinder and the vibration cylinder, and the upper protective cylinder and the vibration cylinder are coaxial and have the same diameter.

[0012] As a further improvement of the present invention, it also includes a base, which is provided with a penetration chamber, and the penetration chamber is located at the lower side of the vibration area. The eccentric block at the lower end of the vibration motor and the lower end of the vibration cylinder are penetrated into the penetration chamber along a first preset direction, so that the base constitutes a lower protective cover for protecting the eccentric block.

[0013] As a further improvement of the present invention, a plurality of air holes are arranged at intervals on the side wall of the upper protective tube.

[0014] As a further improvement of the present invention, reinforcing plates are provided on both sides of the connecting column, and the reinforcing plate on one side extends toward the upper protective tube and is connected to the side wall of the upper protective tube.

[0015] Beneficial effects of the present invention: 1. In the present application, the vibration device is arranged at the lower side of the vibration plate, so that there is no need to arrange a central column in the grinding chamber, thereby making the grinding chamber inside the vibration plate wider than the grinding space of the grinder in the prior art, thereby enabling the grinding device in the present invention to grind aircraft engine blades.

[0016] 2. In the present application, the vibration zone is located at the lower middle part of the vibration disk, and when the vibration motor vibrates, it can be evenly transmitted in the direction of the vibration disk; secondly, it does not occupy the internal space of the vibration disk, so that the engine blades can be placed in the grinding chamber; finally, since the vibration zone formed by a number of vibration springs is an inherent area of ​​the grinding device, and the existing grinding device does not use it, and the vibration cylinder in this embodiment is located in the vibration zone, the space of the vibration zone can be reasonably used. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to help understand the purpose and advantages of the present invention, wherein: Figure 1 It is a structural schematic diagram of an embodiment of the present invention; Figure 2 It is a schematic diagram of the side structure of an embodiment of the present invention; Figure 3 It is a schematic diagram of the internal structure of an embodiment of the present invention.

[0018] Numbers in the figure: vibration plate 1, grinding chamber 2, base 3, vibration zone 4, vibration spring 5, lower mounting column 6, vibration cylinder 7, vibration motor 8, eccentric block 9, annular mounting platform 10, connecting plate 11, connecting column 12, upper protective cylinder 13, penetration chamber 14, air vent 15, reinforcement plate 16, protective cover 17, support column 18, mounting seat 19, telescopic cylinder 20, connecting beam 21. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below based on the accompanying drawings and implementation examples.

[0020] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. The words "inside" and "outside" refer to the direction toward or away from the geometric center of a specific component, respectively. They are relative concepts, and therefore may change accordingly according to different locations and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0021] refer to Figures 1 to 3 , the embodiments of the present invention disclose: A device for grinding blades of aircraft engines, comprising a vibration plate 1, wherein a grinding chamber 2 with an upward opening is arranged in the vibration plate 1, and the grinding chamber 2 is used to contain grinding particles; a vibration device is arranged on the vibration plate 1 to drive the vibration plate 1 to vibrate, and a vibration buffer device is arranged on the lower side of the vibration plate 1, and further comprising a base 3, wherein the vibration buffer device is arranged on the base 3, and a vibration area 4 is arranged in the vibration buffer device, wherein the vibration device is arranged on the lower side of the vibration plate 1 and is located in the vibration area 4, so that the engine blades can be placed in the grinding chamber 2 and the engine blades can be ground. Specifically, as shown in the figure, in this embodiment, it can be divided into a three-layer structure, wherein the bottom layer is the base 3, the middle layer is the vibration buffer device and the vibration device, and the upper layer is the vibration plate 1; through the above arrangement, The vibration device can achieve the function of driving the vibration plate 1 to vibrate, and then drive the grinding particles contained in the grinding chamber 2 to vibrate. At the same time, since the vibration device is arranged on the lower side of the vibration plate 1, the grinding chamber 2 is no longer provided with a central column (transmission cylinder), that is, the vibration plate 1 described in the present embodiment is a U-shaped structure as a whole, so that the grinding chamber 2 inside the vibration plate 1 is wider than the grinding space of the existing grinder. During specific operation, the middle part of the engine blade can be fixed in the middle position of the grinding chamber 2, and the end of the engine blade can be arranged toward the side wall of the grinding chamber 2, so that the engine blade can be placed in the grinding chamber 2 as a whole. At this time, the vibration plate 1 vibrates and drives the grinding particles to vibrate, and then the engine blade is ground and polished. That is, the function of grinding the engine blade can be achieved through the above-mentioned arrangement.

[0022] Specifically, in the present embodiment, the vibration buffer device includes a plurality of vibration springs 5 ​​arranged in a circular array on the lower side of the vibration disk 1, and the space surrounded by each of the vibration springs 5 ​​forms the vibration zone 4; at the same time, each of the vibration springs 5 ​​is also arranged in a circular array on the base 3. When the vibration motor 8 drives the vibration disk 1 to vibrate, the lower end of the vibration disk 1 will squeeze or stretch each of the vibration springs 5 ​​to a certain extent, and each of the vibration springs 5 ​​stores or releases elastic potential energy under the action force, thereby making the vibration of the vibration disk 1 more gentle and balanced. Specifically, a plurality of lower mounting columns 6 are arranged in a circular array on the base 3, and the lower end of the vibration spring 5 can be mounted on the lower mounting column 6 along a first preset direction.

[0023] In the present embodiment, the vibration device comprises a vibration cylinder 7 which is arranged on the lower side of the vibration disk 1 and located in the vibration zone 4, a vibration motor 8 is arranged in the vibration cylinder 7, and eccentric blocks 9 are arranged at both ends of the vibration motor 8. Specifically, an annular mounting platform 10 is arranged inside the vibration cylinder 7, and the middle part of the vibration motor 8 is fixedly arranged on the annular mounting platform 10 by bolts, and as shown in the figure, the eccentric block 9 at one end is located above the annular mounting platform 10, and the eccentric block 9 at the other end is located below the annular mounting platform 10; when the vibration motor 8 is started, it drives the vibration cylinder 7 to vibrate, and the vibration cylinder 7 transmits the transmission to the vibration disk 1, thereby driving the grinding particles to vibrate and grind the engine blades; in the present embodiment, if the vibration device is installed on the side wall of the vibration disk 1, it is easy to cause uneven vibration of the vibration disk 1. If it is located inside the vibration disk 1, it is not convenient for the engine blades to be installed and fixed. If the vibration cylinder 7 is located in the vibration zone 4, it can achieve the following effects: first, First, the vibration zone 4 is located at the lower middle part of the vibration disk 1. When the vibration motor 8 vibrates, it can be evenly transmitted in the direction of the vibration disk 1. Secondly, the internal space of the vibration disk 1 can be not occupied, so that the engine blades can be placed in the grinding chamber 2. Finally, since the vibration zone 4 formed by a plurality of vibration springs 5 ​​is an inherent area of ​​the grinding device, and the existing grinding device does not use it, and the vibration cylinder 7 in this embodiment is located in the vibration zone 4, the space of the vibration zone 4 can be reasonably used; in addition, since the vibration spring 5 surrounds the outside of the vibration cylinder 7, if an external object collides toward the vibration cylinder 7, the vibration spring 5 can prevent the external object from colliding with the vibration cylinder 7 to a certain extent (when an external object of a certain size moves from the side toward the vibration cylinder 7, it will first touch the vibration spring 5, and overcome the elastic potential energy of the vibration spring 5 before it can continue to move toward the vibration cylinder 7), so as to avoid damage to the vibration cylinder 7 and the vibration motor 8 inside it.

[0024] In addition, since the vibration disk 1 in this embodiment needs to place engine blades, the engine blades are larger than conventional workpieces, and the size of the vibration disk 1 is larger than the size of the existing grinding bucket of the grinding device (equivalent to the vibration disk 1 in this application) (it needs to be large enough to accommodate the engine blades). Accordingly, the overall mass of the vibration disk 1 is larger than that of the existing grinding bucket of the grinding device. At this time, if the inside of the vibration cylinder 7 or the vibration disk 1 is damaged, it is not convenient to remove the vibration disk 1 from the base 3; specifically, in the previous grinding device, the vibration disk 1 and the vibration device are fixedly connected, and the two are regarded as a whole. At the same time, the vibration spring 5 on the lower side of the vibration disk 1 can be detachably connected to the base 3. When it is necessary to remove the vibration disk 1 / grinding bucket, the vibration disk 1 / grinding bucket is usually manually lifted to separate the vibration spring 5 from the base 3, so as to realize the disassembly between the vibration disk 1 (including the vibration device) and the base 3. However, in this embodiment, the overall mass of the vibration disk 1 is large, and it is not convenient to manually lift the vibration disk 1 / grinding bucket, that is, it is not convenient to disassemble. Based on this, in this embodiment, the vibration cylinder 7 is detachably connected to the vibration disk 1. Specifically, a connecting disk 11 is provided around the side wall of the vibration cylinder 7. A plurality of upper mounting posts are arranged in a circular array on the lower side of the connecting disk 11, the upper end of the vibration spring 5 is fixedly connected to the upper mounting post, and a plurality of connecting posts 12 are arranged at the lower end of the vibration disk 1, and each of the connecting posts 12 is detachably connected to the connecting disk 11. Specifically, the upper end of the vibration spring 5 is connected to the lower end surface of the connecting disk 11, the connecting posts 12 are arranged in a circular array on the lower side of the vibration disk 1 and the lower ends of the connecting posts 12 are connected to the upper end surface of the connecting disk 11, and the connecting posts 12 and the vibration spring 5 are arranged at intervals with each other; specifically, the connecting A screw hole is provided at the bottom of the column 12, and a through hole for the screw rod of the bolt to pass through is provided along the annular array on the connecting plate 11, so that the connecting column 12 and the connecting plate 11 can be connected by bolts, and the through holes are arranged at intervals with the vibration spring 5. Through the above arrangement, when it is necessary to remove the vibration plate 1, the bolts can be removed first to separate the vibration device (vibration cylinder 7) and the vibration plate 1 from each other. At this time, the vibration plate 1 can be lifted up and removed from the connecting plate 11, and then the vibration device (vibration cylinder 7) can be removed from the base 3 to facilitate manual disassembly of the vibration plate 1.

[0025] Since the energy of vibration will gradually decay during the transmission process [the intensity of vibration (such as amplitude) is inversely proportional to the distance, that is, as the distance increases, the intensity of vibration decreases linearly], the distance between the vibration motor 8 and the vibration disk 1 also affects the vibration transmission effect. Therefore, in the present embodiment, the vibration motor 8 is located at the lower side of the vibration disk 1 and the closer it is to the bottom of the vibration disk 1, the better the vibration transmission effect. Based on this, the eccentric block 9 at the upper end of the vibration motor 8 needs to be closer to the bottom of the vibration disk 1. However, protective covers are usually provided at the eccentric blocks 9 at both ends of the existing vibration motor 8 to protect the eccentric blocks 9 of the vibration motor 8. If the upper end of the vibration motor 8 is too close to the bottom of the vibration disk 1, it is easy for the protective cover to touch the bottom of the vibration disk 1 when the vibration motor 8 vibrates, thereby causing damage to the vibration motor 8 or the vibration disk 1. Based on this, protective covers are no longer provided at both ends of the vibration motor 8 in the present embodiment, and the bottom of the vibration disk 1 is located on the upper side of the vibration cylinder 7 and an upper protective cylinder 13 is provided. Specifically, the upper protective cylinder 13 is fixedly provided at the bottom of the vibration disk 1. The eccentric block 9 at the upper end of the dynamic motor 8 penetrates into the upper protective tube 13 along the first preset direction, so that the protective tube can play the function of protecting the eccentric block 9, and the eccentric block 9 at the upper end of the vibration motor 8 can also be closer to the bottom of the vibration plate 1 (there is still a certain distance between the two to prevent the eccentric block 9 from touching the bottom of the vibration plate 1 during vibration) to improve the vibration transmission effect; there is a movable gap between the upper protective tube 13 and the vibration tube 7, and the upper protective tube 13 and the vibration tube 7 are coaxial and have the same diameter; corresponding In this embodiment, the base 3 is provided with a penetration chamber 14, and the penetration chamber 14 is located at the lower side of the vibration area 4. The eccentric block 9 at the lower end of the vibration motor 8 and the lower end of the vibration tube 7 are penetrated into the penetration chamber 14 along a first preset direction, so that the base 3 constitutes a lower protective cover for protecting the eccentric block 9, that is, the eccentric block 9 at the lower end of the vibration motor 8 is protected by the base 3. In summary, in the production and manufacturing process of this embodiment, it is no longer necessary to set protective covers for both ends of the vibration motor 8.

[0026] A plurality of air holes 15 are arranged at intervals on the side walls of the upper protective tube 13; reinforcing plates 16 are arranged on both sides of the connecting column 12, and one side of the reinforcing plates 16 extends toward the upper protective tube 13 and connects to the side walls of the upper protective tube 13; and in the present embodiment, the air holes 15 are located between two adjacent reinforcing plates 16, and at this time, the reinforcing plates 16 not only play the function of strengthening the structural strength, but also can prevent foreign matter from falling into the air holes 15 to a certain extent (the reinforcing plates 16 are located on both sides of the air holes 15, and can block foreign matter from both sides of the air holes 15).

[0027] In addition, in the present embodiment, a protective cover 17 is further provided above the vibration plate 1 to prevent foreign matter from falling into the grinding chamber 2 in the working state, and a driving device for driving the protective cover 17 to flip is provided on the base 3, and the driving device includes a support column 18 provided on one side of the base 3, and a connecting beam 21 is provided on one side of the protective cover 17, and the connecting beam 21 is hinged to the upper end of the support column 18 at one end away from the protective cover 17. At the same time, a mounting seat 19 is provided on the base 3 on one side of the support column 18, and a telescopic cylinder 20 is provided on the mounting seat 19. Specifically, the telescopic cylinder The lower end of the telescopic cylinder 20 is hinged to the telescopic mounting seat 19, and the output end of the telescopic cylinder 20 is hinged to the lower middle part of the connecting beam 21, so that when the telescopic cylinder 20 is extended and retracted, it can drive the protective cover 17 to flip around the upper end of the support column 18, thereby realizing the opening and closing function of the grinding chamber 2 of the vibration plate 1; however, since the vibration plate 1 will vibrate in this embodiment, but in this embodiment, the protective cover 17 cannot move with the vibration plate 1, therefore, in this embodiment, after the protective cover 17 flips over to protect the top of the vibration plate 1, there is still a preset distance between the protective cover 17 and the vibration plate 1.

[0028] Finally, it should be noted that the above implementation cases are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned implementation cases, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned implementation cases, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the implementation cases of the present invention.

Claims

1. A device for grinding blades of aircraft engines, characterized in that: The invention comprises a vibration plate (1), wherein a grinding chamber (2) with an upward opening is arranged in the vibration plate (1), and the grinding chamber (2) is used to contain grinding particles; a vibration device is arranged on the vibration plate (1) to drive the vibration plate (1) to vibrate, and a vibration buffer device is arranged on the lower side of the vibration plate (1), wherein a vibration area (4) is arranged in the vibration buffer device, and the vibration device is arranged on the lower side of the vibration plate (1) and located in the vibration area (4), so that an engine blade can be placed in the grinding chamber (2) and the engine blade can be ground.

2. The aeroengine blade grinding device according to claim 1, characterized in that: The vibration buffer device comprises a plurality of vibration springs (5) arranged in a ring array on the lower side of the vibration plate (1), and the space surrounded by each of the vibration springs (5) forms the vibration zone (4).

3. The aeroengine blade grinding device according to claim 2, characterized in that: The vibration device comprises a vibration cylinder (7) arranged at the lower side of the vibration plate (1) and located in the vibration area (4), wherein a vibration motor (8) is arranged in the vibration cylinder (7), wherein the vibration cylinder (7) is detachably connected to the vibration plate (1).

4. The aeroengine blade grinding device according to claim 3, characterized in that: A connecting plate (11) is arranged around the side wall of the vibration cylinder (7), and a plurality of connecting columns (12) are arranged at the lower end of the vibration plate (1), and each of the connecting columns (12) is detachably connected to the connecting plate (11).

5. The aeroengine blade grinding device according to claim 4, characterized in that: The upper end of the vibration spring (5) is connected to the lower end surface of the connection disk (11), the connection columns (12) are arranged in a ring array on the lower side of the vibration disk (1) and the lower ends of the connection columns (12) are connected to the upper end surface of the connection disk (11), and the connection columns (12) and the vibration spring (5) are arranged in an interval with each other.

6. The aeroengine blade grinding device according to claim 5, characterized in that: An upper protective tube (13) is arranged at the bottom of the vibration disk (1) and located on the upper side of the vibration tube (7); an eccentric block (9) at the upper end of the vibration motor (8) penetrates into the upper protective tube (13) along a first preset direction; the upper protective tube (13) is fixedly arranged at the bottom of the vibration disk (1); a movable gap is provided between the upper protective tube (13) and the vibration tube (7); the upper protective tube (13) and the vibration tube (7) are coaxial and have the same diameter.

7. The aeroengine blade grinding device according to claim 6, characterized in that: The invention also comprises a base (3), wherein the base (3) is provided with a penetration chamber (14), wherein the penetration chamber (14) is located at the lower side of the vibration zone (4), and the eccentric block (9) at the lower end of the vibration motor (8) and the lower end of the vibration cylinder (7) are penetrated into the penetration chamber (14) along a first preset direction, so that the base (3) constitutes a lower protective cover for protecting the eccentric block (9).

8. The aeroengine blade grinding device according to claim 6, characterized in that: The side wall of the upper protective tube (13) is provided with a plurality of air holes (15) at intervals.

9. The aeroengine blade grinding device according to claim 8, characterized in that: Reinforcement plates (16) are provided on both sides of the connection column (12), wherein the reinforcement plate (16) on one side extends toward the upper protective tube (13) and is connected to the side wall of the upper protective tube (13).

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