A turbine blade tenoning device

Abstract

The present application relates to a kind of turbine working blade tenon tooth processing clamping devices, comprising;Base, the base is divided into multiple stations, each described station is provided with plane positioning mechanism, inclined plane positioning mechanism and pressing mechanism, the plane positioning mechanism and the inclined plane positioning mechanism are arranged on the base, and the pressing mechanism is detachably connected with the base;The two sides of the base width are respectively provided with the plane positioning mechanism, the inclined plane positioning mechanism and the pressing mechanism that cooperate with each other.The beneficial effects of the present application are that the processing pressing device adopts double-station design, improves the processing efficiency by dividing into left and right two stations, improves the process of slender turbine working blade, instead of traditional casting low-melting-point alloy on blade to enhance strength, alloy positioning is used to carry out tenon tooth grinding processing method, new processing clamping device is used to position and clamp blade, and the direct, economic grinding processing of slender low-pressure turbine working blade is realized.

Description

Technical Field

[0001] This invention relates to the field of aero-engine turbine blade manufacturing technology, and in particular to a clamping device for machining the tenon teeth of turbine working blades. Background Technology

[0002] Aero-engine turbine blades are connected to the turbine disk by tenons and teeth, operating in a high-temperature and high-pressure environment. Therefore, the manufacturing precision and surface quality of the tenons and teeth are extremely important. Turbine blades are mostly made of high-temperature alloys, making machining difficult. Grinding is a commonly used and efficient machining process. The most crucial aspect of turbine blade manufacturing is the conversion from the blank datum to the machining datum. Due to the limitations of the blade structure, the blank datum is often selected on the blade body. For blades with high blade strength, the blank datum is directly used for positioning and tenon grinding, achieving the datum conversion. For blades with low blade strength that are difficult to grind directly, especially thin and long blades, a low-melting-point alloy is cast onto the blade body to enhance its strength, and then the alloy is used for positioning and tenon grinding, achieving the datum conversion.

[0003] With the development of science and technology and the progress of society, environmental protection has become increasingly important. Meanwhile, the casting process for low-melting-point alloys inherently suffers from long processing cycles, difficulties in quality control during pickling, and challenges in treating pickling wastewater. Therefore, this paper proposes a clamping device for grinding the tenon teeth of slender low-pressure turbine blades. This device clamps the slender low-pressure turbine blades and allows them to be directly ground, replacing traditional machining methods. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a clamping device for machining the tenon teeth of turbine working blades, which can clamp slender low-pressure turbine working blades and realize direct and economical grinding machining of slender low-pressure turbine working blades.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A turbine working blade tenon tooth processing clamping device includes: a base, the base being divided into multiple workstations, each of the workstations being provided with a planar positioning mechanism, an inclined positioning mechanism and a clamping mechanism, the planar positioning mechanism and the inclined positioning mechanism being disposed on the base, and the clamping mechanism being detachably connected to the base;

[0006] The base width is provided with a planar positioning mechanism, an inclined positioning mechanism and a pressing mechanism that cooperate with each other on both sides.

[0007] The beneficial effects of this invention are: This processing and clamping device adopts a dual-station design, which improves processing efficiency by dividing the processing into left and right stations. By improving the process of slender turbine working blades, it replaces the traditional method of casting low-melting-point alloys on the blade body to enhance strength and then using alloy positioning for tenon grinding. The new processing and clamping device is used to position and clamp the blades, realizing direct and economical grinding processing of slender low-pressure turbine working blades.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the planar positioning mechanism includes a first planar positioning mechanism and a second planar positioning mechanism, and the inclined plane positioning mechanism includes a first inclined plane positioning mechanism and a second inclined plane positioning mechanism;

[0010] The first planar mechanism is configured in conjunction with the first inclined plane positioning mechanism, and the second planar positioning mechanism is configured in conjunction with the second inclined plane positioning mechanism.

[0011] The beneficial effects of adopting the above-mentioned further scheme are: the first plane positioning mechanism and the second plane positioning mechanism are two positioning points set along the length direction of the blade to realize the vertical positioning of the blade; the first inclined plane positioning mechanism and the second inclined plane positioning mechanism realize the horizontal positioning of the blade; the first plane positioning mechanism and the first inclined plane positioning mechanism, and the second plane positioning mechanism and the second inclined plane positioning mechanism cooperate to play a positioning role for the blade.

[0012] Furthermore, the first planar positioning mechanism includes: a first planar positioning block connected to the base, wherein the upper surface of the first planar positioning block is a positioning plane.

[0013] The beneficial effect of adopting the above-mentioned further solution is that the vertical positioning on the leaf crown side is achieved through the positioning plane.

[0014] Furthermore, the first inclined positioning block is located on one side of the first planar positioning block;

[0015] The height of the first inclined positioning block is higher than the height of the first flat positioning block, and the first inclined positioning block extends an inclined positioning surface from the side of the first inclined positioning block closer to the first flat positioning block in the direction closer to the first flat positioning block.

[0016] The beneficial effect of adopting the above-mentioned further solution is that the side of the leaf crown is positioned by the positioning inclined surface, thereby achieving left and right positioning.

[0017] Furthermore, a bracket is also provided on the base, and the bracket is located on the side of the first inclined plane positioning mechanism close to the second inclined plane positioning mechanism;

[0018] The bracket is equipped with a positioning pin.

[0019] The beneficial effect of adopting the above-mentioned further solution is that by positioning the blade in the length direction and the left and right direction, the positional relationship in the left and right direction and the positional relationship in the length direction are matched, thus preventing inaccurate positioning.

[0020] Furthermore, the second planar positioning mechanism includes a second planar positioning block connected to the base, wherein the upper surface of the second planar positioning block is a positioning plane.

[0021] The beneficial effect of adopting the above-mentioned further solution is that the edge plate part near the tenon side is located by the positioning plane.

[0022] Furthermore, the second inclined plane positioning mechanism includes: a second inclined plane positioning block corresponding to the first inclined plane positioning block and connected to the base, wherein the second inclined plane positioning block is located on one side of the second planar positioning block;

[0023] The height of the second inclined positioning block is higher than the height of the second flat positioning block, and the second inclined positioning block extends an inclined positioning surface from the side of the second inclined positioning block closer to the second flat positioning block in the direction closer to the second flat positioning block.

[0024] The beneficial effect of adopting the above-mentioned further solution is that the side of the rear edge plate is positioned by the second inclined positioning block, thereby achieving left and right positioning.

[0025] Furthermore, the clamping mechanism includes: a first eccentric pin, a second eccentric pin, a first clamping screw, and a second clamping screw, wherein the first eccentric pin and the second eccentric pin are disposed on the base between the first planar positioning mechanism and the second planar positioning mechanism;

[0026] The first clamping screw is connected to the top of the base via a crossbeam, and the second clamping screw is connected to the front side of the base via a support plate.

[0027] The beneficial effects of adopting the above-mentioned further solution are: the blade body is pressed from the side by the first eccentric pin and the second eccentric pin; the second clamping screw presses the blade in the length direction.

[0028] Furthermore, a first pressure block is provided on the side of the first clamping screw near the second clamping screw, and the first pressure block is positioned above the first planar positioning block.

[0029] The beneficial effect of adopting the above-mentioned further solution is that the first clamping screw clamps the blade crown part through the first clamping block.

[0030] Furthermore, the clamping mechanism also includes a second pressure block, which is connected to the rear side of the base via a pressure plate and is positioned above the second planar positioning block.

[0031] The beneficial effect of adopting the above-mentioned further solution is that the back edge plate is pressed by the second pressure block. Attached Figure Description

[0032] Figure 1 This is a top view of one embodiment of the present invention;

[0033] Figure 2 for Figure 1 Sectional view along line AA;

[0034] Figure 3 for Figure 1 Sectional view along the BB direction;

[0035] Figure 4 for Figure 1 Sectional view along the CC direction.

[0036] The attached diagram lists the components represented by each number as follows:

[0037] 1. Base; 2. Crossbeam; 3. First plane positioning block; 4. First inclined plane positioning block; 5. First pressure block; 6. Second pressure block; 7. Pressure plate; 8. Protective sleeve; 9. First eccentric pin; 10. Second eccentric pin; 11. Second plane positioning block; 12. Second inclined plane positioning block; 13. Positioning pin; 14. Open washer; 15. First clamping screw; 16. Support plate; 17. Second clamping screw; 18. Screw; 19. Pin; 20. Planar positioning mechanism; 21. Nut; 22. Bolt; 23. Washer; 24. Inclined plane positioning mechanism; 25. Clamping mechanism; 26. Bracket. Detailed Implementation

[0038] The principles and features of the present invention are described below. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0039] This machining clamping device is mainly used for machining blades with low blade strength that are not easy to grind directly, especially thin and long blades. It replaces the traditional method of casting a low-melting-point alloy on the blade to enhance its strength and then using the alloy for positioning and grinding the tenon teeth. The new machining clamping device enables direct and economical grinding of slender low-pressure turbine blades.

[0040] like Figure 1 As shown, in one embodiment of this application, a turbine working blade tenon tooth processing clamping device is specifically disclosed, including: a frame structure formed by connecting a base 1, a crossbeam 2, a pressure plate 7 and a support plate 16, the support plate 16 is installed on the front side of the base 1, the pressure plate 7 is installed on the rear side of the base 1, and the crossbeam 2 is installed above the base 1 near the front side; wherein the base 1 is divided into multiple workstations.

[0041] In this embodiment, the base 1 is divided into two workstations, i.e. Figure 1 The two workstations are shown. The crossbeam 2 is assembled into the slot above the base 1 using screws 18 and open washers 14. The support plate 16 is assembled into the slot on the front side of the base plate using screws 18. The pressure plate 7 is assembled onto the rear side of the base 1 between the two workstations using screws 18, bolts 22, nuts 21, and washers 23. The definition is as follows... Figure 1 The base 1 shown has one side in the width direction as the front side and the other side as the rear side.

[0042] The two workstations have the same structure. The following description will take one of the workstations as an example. Each workstation is equipped with a planar positioning mechanism 20, an inclined plane positioning mechanism 24, and a clamping mechanism 25. The planar positioning mechanism 20, the inclined plane positioning mechanism 24, and the clamping mechanism 25 are all installed in the cavity after the base 1 separates the two workstations. The clamping mechanism 25 is detachably connected to the base 1. Before clamping the workpiece, all clamping mechanisms 25 need to be removed. After the workpiece is placed and positioned, the clamping mechanisms 25 are clamped one by one.

[0043] On both sides of the width of the base 1, there are mutually cooperating planar positioning mechanism 20, inclined positioning mechanism 24 and pressing mechanism 25. The planar positioning mechanism 20, inclined positioning mechanism 24 and pressing mechanism 25 are arranged in groups, and each group includes one planar positioning mechanism 20, one inclined positioning mechanism 24 and one pressing mechanism 25.

[0044] This machining clamping device adopts a dual-station design, with two stations on the left and right to improve machining efficiency. By improving the process of slender turbine working blades, it replaces the traditional method of casting low-melting-point alloys on the blade body to enhance strength and then using the alloy for positioning and grinding of tenons and teeth. The new machining clamping device is used to position and clamp the blades, realizing direct and economical grinding of slender low-pressure turbine working blades.

[0045] like Figure 3 , Figure 4 As shown, the planar positioning mechanism 20 includes a first planar positioning mechanism and a second planar positioning mechanism, and the inclined plane positioning mechanism 24 includes a first inclined plane positioning mechanism and a second inclined plane positioning mechanism; the first planar mechanism and the first inclined plane positioning mechanism are configured in cooperation on the front side of the cavity of the base 1, and the second planar positioning mechanism and the second inclined plane positioning mechanism are configured in cooperation on the rear side of the base 1.

[0046] The first planar positioning mechanism and the second planar positioning mechanism are two positioning points set along the length direction of the blade to achieve vertical positioning of the blade. The first inclined plane positioning mechanism and the second inclined plane positioning mechanism achieve horizontal positioning of the blade. The first planar positioning mechanism and the first inclined plane positioning mechanism, and the second planar positioning mechanism and the second inclined plane positioning mechanism cooperate to perform positioning functions on the blade.

[0047] like Figure 3 As shown, the first planar positioning mechanism includes a first planar positioning block 3 connected to the base 1. In this embodiment, the first planar positioning block 3 is a cuboid and is installed on the base 1 by screws 18 and pins 19. Specifically, the upper surface of the first planar positioning block 3 is set as a horizontal plane, and the upper surface of the first planar positioning block 3 is defined as the positioning plane. The size of the positioning plane is adjusted according to the size of the workpiece, and the upper and lower positioning near the crown side is achieved through the positioning plane.

[0048] like Figure 3 As shown, the first inclined plane positioning mechanism includes: a first inclined plane positioning block 4 connected to the base 1, the first inclined plane positioning block 4 being positioned as shown in the figure. Figure 3 As shown, the first planar positioning block 3 is positioned to the right of the first planar positioning block 3, while the first inclined positioning block 4 is offset from the first planar positioning block 3. Specifically, the height of the first inclined positioning block 4 is higher than the height of the first planar positioning block 3, and the first inclined positioning block 4 extends an inclined positioning surface from the upper side of the side closest to the first planar positioning block 3 in the direction close to the first planar positioning block 3. In this embodiment, the first inclined positioning block 4 is connected to the base 1 by screws 18 and pins 19. Its tilt angle and positioning surface size can be adjusted according to the workpiece size. The side of the blade crown is positioned by this inclined positioning surface to achieve left and right positioning.

[0049] like Figure 1-3 As shown, a bracket 26 is also provided on the base 1. The bracket 26 corresponds to the installation position of the first inclined positioning block 4 and is connected to the base 1 by screws 18 and pins 19. Specifically, the bracket 26 is installed on the side of the first inclined positioning mechanism closer to the second inclined positioning mechanism, and similar to the mechanism of the first inclined positioning mechanism, an extension portion extends from the upper direction of the bracket 26 away from its length direction, and a positioning pin 13 is installed on the extension portion. The positioning pin 13 positions the blade in both the length and left-right directions, ensuring that the left-right and length directions are aligned to prevent inaccurate positioning. The bracket 26 can be mounted on the same connecting plate as the first inclined positioning block 4 and connected to the base 1 through this connecting plate.

[0050] like Figure 4 As shown, the second planar positioning mechanism includes a second planar positioning block 11 connected to the base 1. In this embodiment, the second planar positioning block 11 is a cuboid and is also mounted on the base 1 by screws 18 and pins 19. Specifically, the upper surface of the second planar positioning block 11 is set as a horizontal plane, and the upper surface of the second planar positioning block 11 is defined as the positioning plane. The size of the positioning plane is adjusted according to the workpiece size. The edge plate part near the tenon is positioned through this positioning plane. At the same time, the second planar positioning block 11 is obliquely cut to prevent interference with the clamping mechanism.

[0051] like Figure 4 As shown, the second inclined plane positioning mechanism includes: a second inclined plane positioning block 12 connected to the base 1, wherein the installation position of the second inclined plane positioning block 12 corresponds to the position of the first inclined plane positioning block 4, and is set as follows: Figure 4 The second planar positioning block 11 is shown on its right side. Specifically, the height of the second inclined positioning block 12 is higher than that of the second planar positioning block 11, and the second inclined positioning block 12 extends an inclined positioning surface from the side closest to the second planar positioning block 11 towards the second planar positioning block 11. In this embodiment, the second inclined positioning block 12 is connected to the base 1 by screws 18 and pins 19. Its tilt angle and positioning surface size can be adjusted according to the workpiece size. The second inclined positioning block 12 positions the side of the rear edge plate, achieving left and right positioning.

[0052] like Figure 1 , Figure 3 As shown, the clamping mechanism 25 includes: a first eccentric pin 9, a second eccentric pin 10, a first clamping screw 15, and a second clamping screw 17. The first eccentric pin 9 and the second eccentric pin 10 are directly assembled into pin holes opened on the base 1, and protective sleeves 8 are fitted over the first eccentric pin 9 and the second eccentric pin 10. Specifically, the first eccentric pin 9 is connected to the base 1 on the side of the first planar positioning block 3 away from the first inclined positioning block 4, and the second eccentric pin 10 is connected to the base 1 on the side of the second planar positioning block 11 away from the second inclined positioning block 12. The first eccentric pin 9 and the second eccentric pin 10 are installed between the first planar positioning mechanism and the second planar positioning mechanism. By clamping the blade from the side with the first eccentric pin 9 and the second eccentric pin 10, it can be imagined that the setting positions of the first eccentric pin 9 and the second eccentric pin 10 do not interfere with the planar positioning mechanism 20 and the inclined positioning mechanism 24.

[0053] The first clamping screw 15 is directly mounted on the crossbeam 2, and connected to the upper part of the base 1 via the crossbeam 2. The second clamping screw 17 is mounted on the support plate 16, and connected to the front side of the base 1 via the support plate 16. Figure 2 As shown, a first pressure block 5 is installed on the side of the first clamping screw 15 near the second clamping screw 17. The first pressure block 5 is positioned above the first plane positioning block 3. The second clamping screw 17 presses the blade in the length direction. The first clamping screw 15 presses the blade crown part through the first pressure block 5.

[0054] like Figure 4 As shown, the clamping mechanism 25 further includes a second clamping block 6. In this embodiment, the second clamping block 6 is connected to the rear side of the base 1 via a clamping plate 7. Specifically, the second clamping plate 7 is connected to the clamping plate 7 via a pin 19, and the second clamping block 6 is positioned above the second planar positioning block 11. The back edge plate is clamped by the second clamping block 6.

[0055] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A clamping device for machining tenons on turbine blades, characterized in that, Includes: a base (1), the base (1) being divided into two workstations, each of which is provided with a planar positioning mechanism (20), an inclined positioning mechanism (24) and a pressing mechanism (25), the planar positioning mechanism (20) and the inclined positioning mechanism (24) being disposed on the base (1), and the pressing mechanism (25) being detachably connected to the base (1); The base (1) is provided with a planar positioning mechanism (20), an inclined positioning mechanism (24) and a pressing mechanism (25) on both sides of its width, respectively. The planar positioning mechanism (20) includes a first planar positioning mechanism and a second planar positioning mechanism, and the inclined plane positioning mechanism (24) includes a first inclined plane positioning mechanism and a second inclined plane positioning mechanism. The first planar positioning mechanism is configured in cooperation with the first inclined plane positioning mechanism, and the second planar positioning mechanism is configured in cooperation with the second inclined plane positioning mechanism. The first planar positioning mechanism includes: a first planar positioning block (3) connected to the base (1), wherein the upper end surface of the first planar positioning block (3) is a positioning plane; The first inclined plane positioning mechanism includes: a first inclined plane positioning block (4) connected to the base (1), the first inclined plane positioning block (4) being located on one side of the first planar positioning block (3); The height of the first inclined positioning block (4) is higher than the height of the first flat positioning block (3), and the first inclined positioning block (4) extends into a positioning inclined surface on the side of the first flat positioning block (3) closer to the first flat positioning block (3). The clamping mechanism (25) includes: a first eccentric pin (9), a second eccentric pin (10), a first clamping screw (15), and a second clamping screw (17). The first eccentric pin (9) and the second eccentric pin (10) are disposed on the base (1) between the first planar positioning mechanism and the second planar positioning mechanism. The first clamping screw (15) is connected to the top of the base (1) via the crossbeam (2), and the second clamping screw (17) is connected to the front side of the base (1) via the support plate (16).

2. The turbine working blade tenon tooth machining clamping device according to claim 1, characterized in that, The base (1) is also provided with a bracket (26), which is located on the side of the first inclined plane positioning mechanism close to the second inclined plane positioning mechanism; The bracket (26) is provided with a positioning pin (13).

3. The turbine working blade tenon tooth machining clamping device according to claim 2, characterized in that, The second planar positioning mechanism includes a second planar positioning block (11) connected to the base (1), the upper surface of the second planar positioning block (11) being a positioning plane.

4. The turbine working blade tenon machining clamping device according to claim 3, characterized in that, The second inclined plane positioning mechanism includes: a second inclined plane positioning block (12) corresponding to the first inclined plane positioning block (4) and connected to the base (1), wherein the second inclined plane positioning block (12) is located on one side of the second planar positioning block (11); The height of the second inclined positioning block (12) is higher than the height of the second flat positioning block (11). The second inclined positioning block (12) extends into a positioning inclined surface on the side of the second flat positioning block (11) closer to the second flat positioning block (11).

5. The turbine blade tenon machining clamping device according to claim 1, characterized in that, A first pressure block (5) is provided on the side of the first clamping screw (15) near the second clamping screw (17), and the first pressure block (5) is located above the first planar positioning block (3).

6. The turbine working blade tenon machining clamping device according to claim 3, characterized in that, The pressing mechanism (25) further includes a second pressing block (6), which is connected to the rear side of the base (1) via a pressing plate (7) and is positioned above the second planar positioning block (11).

Images