A grinding fixture for aero-engine blades

Abstract

This utility model discloses a grinding fixture for aero-engine blades, relating to the field of grinding clamping tooling technology. It includes a support plate and an engine blade. The top of the support plate is equipped with two sets of clamping arm assemblies capable of holding the engine blade. A cylinder is also mounted on the top of the support plate to push the clamping arm assemblies towards the center. The clamping arm assembly includes a side clamping plate mounted on the top of the support plate, with a U-shaped plate on one side of the side clamping plate near the center of the support plate. Through the arrangement of the clamping arm assemblies, the U-shaped plate and the square bar can respectively abut against two points on the outside of the blade, allowing the blade to be stably clamped in an upright position. This reduces the preparation time for blade grinding and increases efficiency. Furthermore, the side clamping plate can be adjusted according to the height and width of the blade, enabling it to hold a wide variety of blade sizes, further expanding the applicability of this fixture.

Description

Technical Field

[0001] This utility model relates to the field of grinding clamp fixing tooling technology, specifically a grinding clamp fixing tool for aero-engine blades. Background Technology

[0002] A simplified structural diagram of the high-pressure turbine blades for an aero-engine is attached to the instruction manual. Figure 2 As shown, it mainly consists of an irregular mounting head at the bottom and blades at the top. The blades at the top have extremely high requirements for machining precision, the most important of which is the thickness of each area of ​​the blade. They need to be machined strictly according to the design requirements. However, since there will be certain tolerances in the casting of the blades at the top, after the entire blade is cast, the blades at the top need to be ground to make each blade consistent with the design dimensions.

[0003] A search of existing patents on the China Patent Network (Announcement No.: CN 220260626 U) reveals a grinding fixture for high-pressure turbine blades of aero-engines. This fixture uses a fixed clamping arm and a movable clamping arm as the main components to provide clamping force. A detachable limiting plate on the fixed clamping arm limits the blade's position. While fixing and clamping, it also ensures the consistency of the blade's offset angle, resulting in higher positioning accuracy and thus a higher and more uniform product quality after processing. The most important aspect of this invention is the comprehensive limiting and clamping of the blade achieved through a first limiting clamping plate, a limiting side plate, an upper limiting plate, and a second limiting clamping plate. The clamping and limiting points are sufficient, ensuring limiting accuracy and strong clamping and fixing stability.

[0004] In this application, multiple plates such as limiting side plates, upper limit plates and L-shaped limiting plates are used to fix the turbine blades. However, the turbine blades need to be contacted with each plate one by one, which makes the preparation time for grinding the turbine blades long. Moreover, the turbine blades that can be ground are limited to a single size, which restricts the grinding work of the turbine blades. Therefore, an aero-engine blade grinding fixture is proposed. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a grinding fixture for aero-engine blades to solve the technical problems mentioned in the background.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an aero-engine blade grinding and fixing fixture, comprising a support plate and an engine blade, wherein the top of the support plate is equipped with two sets of clamping arm assemblies capable of clamping the engine blade, and the top of the support plate is equipped with a cylinder capable of pushing the clamping arm assemblies toward the center.

[0007] The clamping arm assembly includes a side clamping plate mounted on the top of the support plate. The side clamping plate has a mountain-shaped plate on one side near the middle of the support plate. A square strip is fixedly connected to the outer wall of the side clamping plate above the mountain-shaped plate. The side clamping plate is composed of an upper clamping frame, a lower clamping frame, and an extension plate. The upper and lower clamping frames are respectively movably sleeved on the upper and lower ends of the extension plate, and the total height of the side clamping plate can be adjusted.

[0008] As a preferred technical solution, a connecting plate is fixed to the bottom of the support plate, and mounting holes are provided on the top of the connecting plate near the four external corners.

[0009] As a preferred technical solution, the outer wall of each set of cylinders is fitted with a U-shaped clamp connected to the top of the support plate. The U-shaped clamp is fixed to the upper surface of the support plate with bolts. Each set of support plates has threaded holes at equal intervals on the top.

[0010] As a preferred technical solution, both the upper and lower clamping frames have a pre-reserved plate groove at the end that contacts the extension plate. A T-shaped plate is fixed to the side of the mountain-shaped plate and snapped into the lower clamping frame. A clearance groove is provided on the side of the lower clamping frame near the mountain-shaped plate to allow the T-shaped plate to be placed or removed. The clearance groove extends to the top of the lower clamping frame and is connected to the plate groove.

[0011] As a preferred technical solution, two sets of hemispherical parts are fixed to the inner wall of the slot at the bottom of the upper clamping frame. The two sets of hemispherical parts are symmetrically arranged about the longitudinal central axis of the upper clamping frame. The two sides of the extension plate are provided with matching stroke grooves at the contact positions with the hemispherical parts.

[0012] As a preferred technical solution, the travel groove is provided with multiple sets of elastic elements and the multiple sets of elastic elements are equidistantly distributed along its length direction, and a snap-fit ​​area is formed between two adjacent sets of elastic elements.

[0013] In summary, the present invention has the following main advantages:

[0014] This utility model, through the setting of the clamping arm assembly, in which the mountain-shaped plate and the square bar can respectively abut against two points on the outside of the blade, so that the blade is stably clamped in an upright state, making the preparation work for blade grinding less time and more efficient. At the same time, the side clamping plate can be adjusted according to the size, height and width of the blade, so that it can clamp a wide variety of blade sizes, further improving the applicability of the fixture. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a three-dimensional structural diagram of the engine blade of this utility model;

[0017] Figure 3This is a three-dimensional structural diagram of the clamping arm assembly of this utility model;

[0018] Figure 4 This is a cross-sectional view of the clamping arm assembly of this utility model;

[0019] Figure 5 This is a cross-sectional plan view of the upper clamping frame and extension plate of this utility model.

[0020] In the diagram: 100, bearing plate; 101, connecting plate; 110, cylinder; 120, U-shaped clamp; 130, threaded hole assembly;

[0021] 200. Clamping arm assembly; 210. Side clamping plate; 211. Upper clamping frame; 212. Lower clamping frame; 213. Extension plate; 214. Relief groove; 215. Plate groove opening; 216. Hemispherical component; 217. Stroke groove; 218. Elastic component; 220. Herringbone plate; 230. Square strip; 240. T-shaped plate;

[0022] 300, Engine blade; 310, First limiting part; 320, Second limiting part. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0024] The embodiments of this utility model will be described below based on its overall structure.

[0025] A type of grinding fixture for aero-engine blades, such as Figures 1 to 5 As shown, it includes a support plate 100 and an engine blade 300. The top of the support plate 100 is equipped with two sets of clamping arm assemblies 200 capable of clamping the engine blade 300. The top of the support plate 100 is equipped with a cylinder 110 capable of pushing the clamping arm assemblies 200 toward the center.

[0026] The clamping arm assembly 200 includes a side clamping plate 210 mounted on the top of the support plate 100. A mountain-shaped plate 220 is provided on one side of the side clamping plate 210 near the middle of the support plate 100. A square strip 230 is fixedly connected to the outer wall of the side clamping plate 210 above the mountain-shaped plate 220. The side clamping plate 210 is composed of an upper clamping frame 211, a lower clamping frame 212 and an extension plate 213. The upper clamping frame 211 and the lower clamping frame 212 are respectively movably sleeved on the upper and lower ends of the extension plate 213, and the total height of the side clamping plate 210 can be adjusted.

[0027] Both the upper clamping frame 211 and the lower clamping frame 212 have a pre-reserved plate groove 215 at the end that contacts the extension plate 213. The side of the mountain-shaped plate 220 is fixed with a T-shaped plate 240 that is snapped into the lower clamping frame 212. The side of the lower clamping frame 212 near the mountain-shaped plate 220 is provided with a relief groove 214 that can take out and put in the T-shaped plate 240. The relief groove 214 extends to the top of the lower clamping frame 212 and is connected to the plate groove 215.

[0028] Two sets of hemispherical parts 216 are fixed to the inner wall of the plate groove 215 at the bottom of the upper clamping frame 211. The two sets of hemispherical parts are symmetrically arranged about the longitudinal central axis of the upper clamping frame 211. The two sides of the extension plate 213 are provided with matching stroke grooves 217 at the contact positions with the hemispherical parts 216. The outer wall of the lower clamping frame 212 is provided with two sets of locking bolts that abut against the extension plate 213.

[0029] Multiple sets of elastic elements 218 are provided in the travel groove 217 and are equidistantly distributed along its length direction, forming a snap-fit ​​area between adjacent sets of elastic elements 218.

[0030] When grinding the engine blade 300, first place the blade on top of the support plate 100, as per the instruction manual. Figure 2 As shown, while maintaining this state, the device moves onto the support plate 100. At this time, the control cylinder 110 operates, and its output end pushes the side clamping plate 210 to move towards the blade direction. Finally, the mountain-shaped plate 220 will abut against the second limiting part 320 on the engine blade 300, while the square bar 230 enters the first limiting part 310. The lower surface of the square bar 230 contacts the engine blade 300, providing convenience for subsequent processing of engine blades 300 of different sizes (the size of the square bar 230 is always smaller than the slot of the first limiting part 310, thereby satisfying the fixing function of engine blades 300 of various sizes). This makes the operation of clamping the engine blade 300 simple and efficient.

[0031] When the size of the ground engine blade 300 is changed, the locking effect between the lower clamping frame 212 and the extension plate 213 can be released, and the extension plate 213 can be pulled out from the lower clamping frame 212. At this time, it no longer restrains the T-shaped plate 240. The mountain-shaped plate 220 and the T-shaped plate 240 can be lifted vertically upward until they are separated from the lower clamping frame 212, and the mountain-shaped plate 220 adapted to the blade size can be reinstalled. Alternatively, the upper clamping frame 211 can be pulled upward, and the hemispherical part 216 squeezes the elastic part 218 to deform it, allowing the hemispherical part 216 to enter the adjacent snap-fit ​​area, thereby adjusting the horizontal height of the side clamping plate 210 so that the square bar 230 and the mountain-shaped plate 220 can clamp the blade.

[0032] Please refer to this carefully. Figure 1A connecting plate 101 is fixed to the bottom of the bearing plate 100, and mounting holes are provided on the top of the connecting plate 101 near the four external corners.

[0033] By passing the bolt through the mounting hole and tightening the bolt to fix the bearing plate 100 on the processing table, the blade can be ground.

[0034] Please refer to this carefully. Figure 1 Each set of cylinders 110 has its outer wall fitted with a U-shaped clamp 120 connected to the top of the support plate 100. The U-shaped clamp 120 is fixed to the upper surface of the support plate 100 with bolts. Each set of support plates 100 has threaded holes 130 at equal intervals on its top.

[0035] The two adjacent sets of cylinders 110 are fixed by U-shaped clamps 120, which can be adjusted according to the width or thickness of the blade. Together with the side clamps 210 with adjustable total height, they can meet the requirements for clamping and processing blades of various sizes.

[0036] In use, first place the blade on top of the support plate 100, as per the instruction manual. Figure 2 As shown, while maintaining this state, the device moves onto the support plate 100. At this time, the control cylinder 110 operates, and its output end pushes the side clamping plate 210 to move towards the blade direction. Finally, the mountain-shaped plate 220 will abut against the second limiting part 320 on the engine blade 300, while the square bar 230 enters the first limiting part 310. The lower surface of the square bar 230 contacts the engine blade 300, providing convenience for subsequent processing of engine blades 300 of different sizes (the size of the square bar 230 is always smaller than the slot of the first limiting part 310, thereby satisfying the fixing function of engine blades 300 of various sizes). This makes the operation of clamping the engine blade 300 simple and efficient.

[0037] When the size of the ground engine blade 300 is changed, the locking effect between the lower clamping frame 212 and the extension plate 213 can be released, and the extension plate 213 can be pulled out from the lower clamping frame 212. At this time, it no longer constrains the T-shaped plate 240, and the mountain-shaped plate 220 and the T-shaped plate 240 can be lifted vertically upward until they are separated from the lower clamping frame 212. The mountain-shaped plate 220 adapted to the blade size can then be reinstalled. Alternatively, the upper clamping frame 211 can be pulled upward, and the hemispherical part 216 can compress the elastic part 218 to deform it, allowing the hemispherical part 216 to enter the adjacent snap-fit ​​area. This adjusts the horizontal height of the side clamping plate 210, so that the square bar 230 and the mountain-shaped plate 220 can clamp the blade. All parts not mentioned in this device are the same as or can be implemented using existing technology.

[0038] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. An aeroengine blade grinding fixture comprising a carrier plate (100) and an engine blade (300), characterized in that: The top of the support plate (100) is equipped with two sets of clamping arm assemblies (200) capable of clamping the engine blade (300), and the top of the support plate (100) is equipped with a cylinder (110) capable of pushing the clamping arm assemblies (200) to move towards the center. The clamping arm assembly (200) includes a side clamping plate (210) mounted on the top of the support plate (100). The side clamping plate (210) has a mountain-shaped plate (220) on one side near the middle of the support plate (100). A square strip (230) is fixedly connected to the outer wall of the side clamping plate (210) above the mountain-shaped plate (220). The side clamping plate (210) is composed of an upper clamping frame (211), a lower clamping frame (212), and an extension plate (213). The upper clamping frame (211) and the lower clamping frame (212) are respectively movably sleeved on the upper and lower ends of the extension plate (213) and can adjust the total height of the side clamping plate (210).

2. An aeroengine blade grinding fixture according to claim 1, wherein: The bottom of the support plate (100) is fixed with a connecting plate (101), and the top of the connecting plate (101) is provided with mounting holes near the four external corners.

3. An aeroengine blade grinding fixture as claimed in claim 1, wherein: The outer wall of each set of cylinders (110) is fitted with a U-shaped clamp (120) connected to the top of the support plate (100). The U-shaped clamp (120) is fixed to the upper surface of the support plate (100) with bolts. Each set of support plates (100) has a set of threaded holes (130) at equal intervals on the top.

4. An aeroengine blade grinding fixture as claimed in claim 1, wherein: The upper clamping frame (211) and the lower clamping frame (212) are both reserved with a plate groove (215) at the end that contacts the extension plate (213). The side of the mountain-shaped plate (220) is fixed with a T-shaped plate (240) that is snapped into the lower clamping frame (212). The side of the lower clamping frame (212) near the mountain-shaped plate (220) is provided with a relief groove (214) that can take out and put in the T-shaped plate (240). The relief groove (214) extends to the top of the lower clamping frame (212) and is connected to the plate groove (215).

5. An aeroengine blade grinding fixture as claimed in claim 4, wherein: Two sets of hemispherical parts (216) are fixed on the inner wall of the plate groove (215) at the bottom of the upper clamping frame (211). The two sets of hemispherical parts (216) are symmetrically arranged about the longitudinal central axis of the upper clamping frame (211). The two sides of the extension plate (213) are provided with matching stroke grooves (217) at the contact positions with the hemispherical parts (216).

6. The aero-engine blade grinding fixture according to claim 5, characterized in that: The travel groove (217) is provided with multiple sets of elastic elements (218) and the multiple sets of elastic elements (218) are equidistantly distributed along its length direction, and a snap-fit ​​area is formed between two adjacent sets of elastic elements (218).

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