Aero-engine blade punching auxiliary fixture

Abstract

This utility model relates to an auxiliary fixture for drilling holes in aero-engine blades, comprising: a positioning block; at least two reference pins, one end of each reference pin being detachably connected to the upper end of the positioning block, and the other end being used to fit and insert into the mounting hole of the blade; a pressure plate located on the same side of the positioning block as each reference pin; and a clamping assembly detachably connected to both the positioning block and the pressure plate, such that the pressure plate clamps the blade mounting plate tightly against the positioning block. This auxiliary fixture for drilling holes in aero-engine blades can be used in conjunction with other drilling operations, reducing debugging time, and is simple to operate and low in cost.

Description

Technical Field

[0001] This utility model relates to the technical field of drilling equipment for aero-engine blades, and in particular to an auxiliary fixture for drilling aero-engine blades. Background Technology

[0002] Film cooling holes on aero-engine blades are crucial channels for heat dissipation, enhancing cooling efficiency and overall performance, and ensuring normal operation under high temperature and pressure conditions. During blade drilling, fixtures are needed to secure the blade and ensure stability. A single-stage guide vane has over 400 film cooling holes distributed across the large and small fins, and the back face of the blade. Traditional positioning methods use multiple surfaces on the front and rear fins, leading to interference from some holes. Special fixtures are designed for each interference hole, requiring more than four sets of drilling fixtures, each with inconsistent reference directions, making alignment and adjustment difficult, time-consuming, and inefficient. Utility Model Content

[0003] This utility model provides an auxiliary fixture for drilling holes in aero-engine blades, which can be used in multiple drilling operations to reduce debugging time. It is also simple to operate and low in cost.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0005] An auxiliary fixture for drilling holes in aero-engine blades, comprising:

[0006] Positioning block;

[0007] The reference pins are provided in at least two, and one end of each reference pin can be detachably connected to the upper end of the positioning block, and the other end is used to fit and insert into the mounting hole of the blade.

[0008] The pressure plate, which is located on the same side of the positioning block as each of the reference pins;

[0009] A clamping assembly is detachably connected to both the positioning block and the pressure plate, such that the pressure plate presses the blade mounting plate against the positioning block.

[0010] The beneficial effects of this utility model are as follows: During processing, one end of each of the multiple reference pins is detachably connected to the positioning block, and the other end of each reference pin is inserted into the respective mounting holes of the blade mounting plate to form a positioning and installation of the blade. Then, the clamping assembly applies force to the pressure plate until the pressure plate presses against the blade mounting plate, completing the stable clamping and installation of the blade. At this time, the blade forms a "suspended" effect through the multiple reference pins, which can effectively avoid interference and expose all the holes to be processed in the operable area above the positioning block. This can reduce the need for multiple blade fixture adjustments and enable the blade to be quickly positioned and clamped, thereby shortening the processing and adjustment time and further improving production efficiency.

[0011] Based on the above technical solution, the present invention can be further improved as follows.

[0012] Furthermore, an adjustment groove is provided on one side of the positioning block, and an upper boss and a lower boss are respectively connected to the upper and lower groove walls of the adjustment groove. The lower end of the pressure plate abuts against the lower boss, and one end of each of the reference pins can be detachably connected to the upper boss. The clamping assembly can be detachably connected to the bottom of the adjustment groove.

[0013] Furthermore, the upper end of the positioning block is provided with multiple countersunk holes, one end of each reference pin is stepped and is detachably connected to each countersunk hole, and the stepped surface of one end of each reference pin abuts against the stepped surface of the corresponding countersunk hole.

[0014] Furthermore, some of the reference pins have a cylindrical structure at one end to form a reference cylindrical pin, while the other reference pins have a rhomboid structure at one end to form a reference rhomboid pin.

[0015] Furthermore, the upper end of the positioning block is provided with a transverse clearance groove, and the upper end of the positioning block is chamfered to form a clearance slope that connects its upper side and the bottom of the clearance groove. Each of the reference pins is connected to the clearance groove.

[0016] Furthermore, the clamping assembly includes a double-ended screw threaded to one end of the positioning block and a wing nut threaded to the other end of the double-ended screw. The pressure plate is slidably connected to the double-ended screw and is clamped by the wing nut.

[0017] Furthermore, the pressure plate has a through-hole with a vertically extending length direction, and the double-headed screw is slidably connected to the through-hole.

[0018] Furthermore, at least one reference pin is distributed on both sides of the pressure plate along the horizontal direction.

[0019] Furthermore, at least one adjustment groove is provided on the upper end of the pressure plate facing the positioning block, and each adjustment groove passes through the upper side of the pressure plate.

[0020] Furthermore, a base plate is detachably connected to the lower end of the positioning block, and a machine tool connector is detachably connected to the lower side of the base plate. Attached Figure Description

[0021] Figure 1 This is a structural diagram of the aero-engine blade drilling auxiliary fixture of this utility model;

[0022] Figure 2 This is an exploded view of the aero-engine blade drilling auxiliary fixture of this utility model;

[0023] Figure 3 For the present utility model Figure 2 An enlarged view of part A;

[0024] Figure 4 This is a partial structural diagram of the aero-engine blade drilling auxiliary fixture of this utility model;

[0025] Figure 5 This is a diagram showing the usage state of the aero-engine blade drilling auxiliary fixture of this utility model;

[0026] Figure 6 For the present utility model Figure 5 An enlarged view of part B.

[0027] The attached diagram lists the components represented by each number as follows:

[0028] 1. Machine tool connecting parts; 11. Step blocks;

[0029] 2. Base plate;

[0030] 3. Positioning block; 31. Adjustment groove; 311. Upper boss; 312. Lower boss; 32. Countersunk hole; 33. Clearance groove; 34. Clearance slope;

[0031] 4. Reference cylindrical pin;

[0032] 5. Reference diamond pin;

[0033] 6. Pressure plate; 61. Strip hole; 62. Adjustment groove;

[0034] 7. Clamping assembly; 71. Double-ended screw; 72. Wing nut; 73. Locating nut; 74. Washer;

[0035] 8. Blade; 81. Mounting plate; 811. Mounting hole. Detailed Implementation

[0036] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0037] Example 1

[0038] like Figures 1-6 An auxiliary fixture for drilling holes in aero-engine blades, comprising:

[0039] Positioning block 3;

[0040] The reference pins are provided in at least two, and one end of each reference pin can be detachably connected to the upper end of the positioning block 3, and the other end is used to fit and insert into the mounting hole 811 of the blade 8.

[0041] The pressure plate 6 and each reference pin are located on the same side of the positioning block 3;

[0042] The clamping assembly 7 is detachably connected to both the positioning block 3 and the pressure plate 6, so that the pressure plate 6 presses the mounting plate 81 of the blade 8 against the positioning block 3.

[0043] The beneficial effects of this embodiment are as follows: During processing, one end of each of the multiple reference pins is detachably connected to the positioning block 3, and the other end of each reference pin is inserted into the mounting holes 811 of the blade 8 mounting plate 81 to form a positioning installation of the blade 8. Then, the clamping assembly 7 applies force to the pressure plate 6 until the pressure plate 6 presses against the mounting plate 81 of the blade 8, completing the stable clamping installation of the blade 8. At this time, the blade 8 forms a "suspended" effect through the multiple reference pins, which can effectively avoid interference and expose all the holes to be processed in the operable area above the positioning block 3. This can reduce the adjustment work of multiple sets of blade 8 fixtures, and can quickly position and clamp the blade 8, thereby shortening the processing and adjustment time and further improving production efficiency.

[0044] By using this aero-engine blade drilling auxiliary fixture, it is no longer necessary to use multiple sets of fixtures. When clamping the blade 8, it will not obstruct the hole to be processed on the blade 8, which can reduce debugging time, reduce drilling error, improve processing accuracy and efficiency, and at the same time, it is simple to operate and low in cost.

[0045] In this embodiment, the number of reference pins can be two, three, four, five, or six, etc.

[0046] The positioning block 3 can be made of CrWMn material, and its hardness after heat treatment reaches HRC58-62. The pressure plate 6 can be made of 45 steel material, and its hardness after heat treatment reaches HRC35-40.

[0047] Example 2

[0048] like Figure 1 and Figure 2 Based on embodiment 1, an adjustment groove 31 is provided on one side of the positioning block 3, and an upper boss 311 and a lower boss 312 are respectively connected to the upper and lower groove walls of the adjustment groove 31. The lower end of the pressure plate 6 abuts against the lower boss 312. One end of each reference pin can be detachably connected to the upper boss 311. The clamping assembly 7 can be detachably connected to the bottom of the adjustment groove 31.

[0049] The beneficial effect of the preferred solution in the above embodiments is that, during pressing, the lower boss 312 provides support to the lower end of the pressure plate 6, while the upper boss 311 indirectly provides support to the upper end of the pressure plate 6. During the pressing process of the pressing assembly 7, the adjusting groove 31 can form a deformation space for the pressure plate 6 to bend under pressure, so as to ensure that the pressure plate 6 can press the blade 8 against the upper boss 311 under the action of the reaction force.

[0050] Based on the above embodiment, the adjusting groove 31 extends laterally through both sides of the positioning block 3.

[0051] The lateral dimension of the upper boss 311 is smaller than that of the lower boss 312, and the difference between the two dimensions is equal to the thickness of the mounting plate 81 of the blade 8, so as to ensure that when the pressure plate 6 presses on the blade 8, a surface contact structure is formed between the pressure plate 6 and the blade 8, thereby improving the pressing effect.

[0052] Example 3

[0053] like Figure 2 and Figure 3 Based on embodiments 1 and 2, the upper end of the positioning block 3 is provided with multiple countersunk holes 32, one end of each reference pin is a stepped structure, and each pin is detachably connected to each countersunk hole 32, and the stepped surface of one end of each reference pin abuts against the stepped surface of the corresponding countersunk hole 32.

[0054] The beneficial effect of adopting the preferred solution in the above embodiments is that each reference pin is stably installed through each countersunk hole 32, and the stepped surface of one end of each reference pin abuts against the stepped surface of the corresponding countersunk hole 32, ensuring that when subjected to the frictional force of the blade 8, it is limited by the stepped surface of the countersunk hole 32, thus completing the stable installation.

[0055] Based on the above embodiment, the countersunk hole 32 is formed on the upper boss 311.

[0056] Example 4

[0057] like Figure 2 and Figure 3 Based on Examples 1-3, some reference pins have a cylindrical structure at the other end to form reference cylindrical pin 4, and other reference pins have a rhomboid structure at the other end to form reference rhomboid pin 5.

[0058] The beneficial effect of adopting the preferred solution in the above embodiments is that the mounting plate 81 of the blade 8 is positioned by the reference cylindrical pin 4 and the reference diamond pin 5, the reference cylindrical pin 4 is inserted into part of the mounting hole 811 on the corresponding mounting plate 81, and the reference diamond pin 5 is inserted into other mounting holes 811 on the corresponding mounting plate 81.

[0059] In the figure, there are two reference pins, one is the reference cylindrical pin 4, and the other is the reference rhomboid pin 5.

[0060] Example 5

[0061] like Figure 2 , Figure 3 , Figure 5 as well as Figure 6 Based on embodiments 1-4, the upper end of the positioning block 3 is provided with a horizontally penetrating relief groove 33, and the upper end of the positioning block 3 is chamfered to form a relief inclined surface 34 that connects its upper side and the bottom of the relief groove 33. Each reference pin is connected to the relief groove 33.

[0062] The beneficial effect of adopting the preferred solution in the above embodiments is that when the blade 8 is pressed against the upper end of the positioning block 3 by the pressure plate 6, the avoidance groove 33 and the avoidance slope 34 can avoid the blade 8, reducing the possibility of local damage to the blade 8 by the upper structure of the positioning block 3.

[0063] Example 6

[0064] like Figure 1 and Figure 2 Based on embodiments 1-5, the clamping assembly 7 includes a double-ended screw 71 with one end threaded to the positioning block 3 and a wing nut 72 with the other end threaded to the double-ended screw 71. The pressure plate 6 is slidably connected to the double-ended screw 71 and is clamped by the wing nut 72.

[0065] The beneficial effect of adopting the preferred solution in the above embodiments is that after the other end of each reference pin is inserted into the mounting holes 811 of the blade 8 mounting plate 81 to form the positioning and installation of the blade 8, the pressure plate 6 is slid on the double-ended screw 71 and the wing nut 72 is tightened until the pressure plate 6 presses against the blade 8.

[0066] Based on the above embodiment, the positioning block 3 has a first insertion hole that extends horizontally through it, and the first insertion hole is connected to the bottom of the adjustment groove 31.

[0067] The clamping assembly 7 also includes a positioning nut 73 and a washer 74. The positioning nut 73 is fixedly connected to the bottom of the adjusting groove 31 of the positioning block 3 and communicates with the first insertion hole. One end of the double-ended screw 71 is slidably connected to the first insertion hole and threadedly connected to the positioning nut 73. The washer 74 is sleeved on the double-ended screw 71, and the wing nut 72 is pressed against the pressure plate 6 through the washer 74.

[0068] Example 7

[0069] like Figure 4 Based on embodiments 1-6, the pressure plate 6 has a through-hole 61, the length of the through-hole 61 extends vertically, and the double-headed screw 71 is slidably connected to the through-hole 61.

[0070] The beneficial effect of adopting the preferred solution in the above embodiments is that the double-ended screw 71 can be slidably installed through the strip hole 61, and the position of the pressure plate 6 relative to the double-ended screw 71 can be adjusted vertically to ensure that the pressure plate 6 effectively presses the blade 8.

[0071] Example 8

[0072] like Figure 1 and Figure 2 Based on Examples 1-7, at least one reference pin is distributed on both sides of the pressure plate 6 along the horizontal direction.

[0073] The advantage of adopting the preferred solution in the above embodiments is that the pressure plate 6 and the clamping assembly 7 are positioned relative to each reference pin in the middle position, so as to ensure that the blade 8 is firmly clamped.

[0074] In the figure, two reference pins are shown, and the two reference pins are located on both sides of the pressure plate 6.

[0075] Example 9

[0076] like Figure 4 Based on embodiments 1-8, at least one adjustment groove 62 is provided on the upper end of the pressure plate 6 facing the positioning block 3, and each adjustment groove 62 passes through the upper side of the pressure plate 6.

[0077] The beneficial effect of adopting the preferred solution in the above embodiments is that by opening the adjustment groove 62, when the upper end of the pressure plate 6 presses against the blade 8, multiple pressing points can be formed on the mounting plate 81 of the blade 8, thereby improving the pressing effect.

[0078] In addition, the adjustment groove 62 also serves to avoid protruding features on the mounting plate 81 of the blade 8.

[0079] Example 10

[0080] like Figure 1 and Figure 2 Based on embodiments 1-9, the lower end of the positioning block 3 is detachably connected to the base plate 2, and the lower side of the base plate 2 is detachably connected to the machine tool connector 1.

[0081] The advantage of adopting the preferred solution in the above embodiments is that the positioning block 3 is stably installed by the base plate 2, and the fixture is installed on the worktable of the machine tool by the machine tool connector 1, so as to realize the drilling process of the blade 8.

[0082] The positioning block 3 and the base plate 2 can be detachably connected by an assembly of a first pin and a first screw, and the base plate 2 and the machine tool connector 1 can be detachably connected by an assembly of a second pin and a second screw.

[0083] Based on the above embodiments, a stepped block 11 is fixedly connected to the lower end of the machine tool connector 1. The stepped block 11 can be adapted to and slidably connected to the machine tool's worktable to achieve stable sliding installation between the machine tool connector 1 and the machine tool's worktable. The stepped block 11 has several holes and slots that match the machine tool, which can quickly position and clamp the fixture, thereby shortening the processing and debugging time and further improving production efficiency.

[0084] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0085] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0086] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0087] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0088] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0089] 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. An aeroengine blade drilling assist fixture, characterized by, include: Positioning block (3); The reference pins are provided in at least two, and one end of each reference pin can be detachably connected to the upper end of the positioning block (3), and the other end is used to adapt to and insert into the mounting hole (811) of the blade (8). The pressure plate (6) and each of the reference pins are located on the same side of the positioning block (3); A clamping assembly (7) is detachably connected to both the positioning block (3) and the pressure plate (6) so that the pressure plate (6) presses the mounting plate (81) of the blade (8) against the positioning block (3).

2. The auxiliary fixture for drilling turbine blades of an aeroengine according to claim 1, characterized in that, The positioning block (3) has an adjustment groove (31) on one side, and an upper boss (311) and a lower boss (312) are respectively connected to the upper and lower groove walls of the adjustment groove (31). The lower end of the pressure plate (6) abuts against the lower boss (312). One end of each of the reference pins can be detachably connected to the upper boss (311). The clamping assembly (7) can be detachably connected to the bottom of the adjustment groove (31).

3. The auxiliary fixture for drilling turbine blades of aero-engines according to claim 1, characterized in that, The upper end of the positioning block (3) is provided with multiple countersunk holes (32). One end of each reference pin is stepped and is detachably connected to each countersunk hole (32). The stepped surface of one end of each reference pin abuts against the stepped surface of the corresponding countersunk hole (32).

4. The auxiliary fixture for drilling turbine blades of claim 3, wherein, Some of the reference pins have a cylindrical structure at one end to form a reference cylindrical pin (4), while the other reference pins have a rhomboid structure at one end to form a reference rhomboid pin (5).

5. The auxiliary fixture for drilling turbine blades of claim 1, wherein, The upper end of the positioning block (3) is provided with a horizontal through groove (33), and the upper end of the positioning block (3) is chamfered to form a chamfered surface (34) that connects its upper side and the bottom of the chamfered groove (33). Each of the reference pins is connected to the chamfered groove (33).

6. The auxiliary fixture for drilling turbine blades of claim 1, wherein, The clamping assembly (7) includes a double-ended screw (71) with one end threaded to the positioning block (3) and a wing nut (72) threaded to the other end of the double-ended screw (71). The pressure plate (6) is slidably connected to the double-ended screw (71) and is clamped by the wing nut (72).

7. The auxiliary fixture for drilling aeroengine blade according to claim 6, characterized in that, The pressure plate (6) has a through-hole (61) extending vertically in the length direction, and the double-headed screw (71) is slidably connected to the through-hole (61).

8. The auxiliary fixture for drilling turbine blades of aero-engines according to claim 1, characterized in that, The pressure plate (6) has at least one reference pin distributed on both sides along the horizontal direction.

9. The auxiliary fixture for drilling turbine blades of aero-engines according to claim 1, characterized in that, At least one adjustment groove (62) is provided on the upper end of the pressure plate (6) facing the positioning block (3), and each adjustment groove (62) passes through the upper side of the pressure plate (6).

10. The auxiliary fixture for drilling turbine blades of an aero-engine according to any one of claims 1-9, characterized in that, The lower end of the positioning block (3) is detachably connected to a base plate (2), and the lower side of the base plate (2) is detachably connected to a machine tool connector (1).

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