Fixture for laser welding of W-shaped metal sealing ring blank of aero-engine

Abstract

The invention provides a clamp for laser welding of a W-shaped metal sealing ring blank of an aero-engine, and belongs to the technical field of aero-engine part machining, the clamp specifically comprises a base and a pressing plate, the base comprises a mounting section and a working section which are connected in sequence, the mounting section is mounted on laser welding equipment, and the working section is mounted on the working section; the end, away from the mounting section, of the working section is used for penetrating through a W-shaped metal sealing ring blank, a strip-shaped groove is formed in the working section and corresponds to a welding seam of the W-shaped metal sealing ring blank, the pressing plate is used for pressing parts on the two sides of the welding seam of the W-shaped metal sealing ring blank on the working section, and a hollow area corresponding to the welding seam of the W-shaped metal sealing ring blank is arranged on the pressing plate; one end of the strip-shaped groove is provided with a run-on plate fixed to the base, the other end of the strip-shaped groove is provided with a run-off plate fixed to the base, and through the treatment scheme, the laser welding efficiency of the sealing ring is improved, and the welding quality is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of aircraft engine parts processing, and in particular to a fixture for laser welding of a W-shaped metal sealing ring blank of an aircraft engine. Background Art

[0002] With the continuous deepening of the research on the internal flow loss of aircraft engines, how to reduce the internal flow loss of engines through sealing technology is one of the key research contents to improve engine performance. As an important part of the mechanical power system of aircraft engines, the sealing ability of the sealing device has a very important impact on the performance of aircraft engines, especially for the gas path sealing, which will directly affect the compression ratio and turbine efficiency of aircraft engines. Studies have shown that there are more than 50 places in modern aircraft engines that require gas path sealing. When the sealing leakage is reduced by 1%, the engine thrust will increase by 1% and the fuel consumption rate will decrease by 0.1%.

[0003] The sealing structure of aircraft engines must withstand multiple loads such as high ambient temperature, high sealing pressure difference and severe vibration, and under working conditions, it must meet the requirements of no leakage, small mass, easy installation and unloading, low manufacturing cost, good interchangeability and repeated use. Conventional static sealing parts are no longer suitable for the use requirements of aircraft engines. Elastic metal sealing parts have the characteristics of various cross-sectional types, light mass, low axial load and good elastic tracking and compensation capabilities, and have gradually become the main sealing parts of aircraft engines. W-type metal sealing rings are common sealing parts for aircraft engines. In the production process, the sheet blanks are first laser welded into W-type metal sealing ring blanks, and then mold stamping is used to obtain qualified W-type metal sealing rings.

[0004] Laser welding is a common process in the processing of metal sealing rings due to their thin walls, small size, and high quality requirements. During the laser welding of metal sealing rings, the input of laser energy, the metallurgical reaction of the welding molten pool, and the flatness and consistency of the welding position have a profound impact on the overall quality of the welded joint. If manual positioning and welding are used, it is difficult to ensure the efficiency of the welding process and the stability of the welding quality. Summary of the invention

[0005] In view of this, the present application provides a fixture for laser welding of a W-shaped metal sealing ring blank of an aircraft engine, which solves the problems in the prior art, improves the efficiency of laser welding of the sealing ring, and ensures the welding quality.

[0006] The present application provides a fixture for laser welding of a W-shaped metal sealing ring blank for an aircraft engine, which adopts the following technical solution:

[0007] A fixture for laser welding of a W-shaped metal sealing ring blank of an aircraft engine, comprising a base and a pressing plate, wherein the base comprises a mounting section and a working section connected in sequence, wherein the mounting section is mounted on a laser welding device, wherein an end of the working section away from the mounting section is used to pass through the W-shaped metal sealing ring blank, wherein a strip groove is provided on the working section, wherein the strip groove corresponds to a weld of the W-shaped metal sealing ring blank, wherein the pressing plate is used to press portions on both sides of the weld of the W-shaped metal sealing ring blank onto the working section, wherein a hollow area corresponding to the weld of the W-shaped metal sealing ring blank is provided on the pressing plate;

[0008] An arc-starting plate fixed on a base is provided at one end of the strip groove, and an arc-closing plate fixed on the base is provided at the other end of the strip groove. The arc-starting plate abuts against one end surface of a W-shaped metal sealing ring blank, and the arc-closing plate abuts against the other end surface of the W-shaped metal sealing ring blank, and the arc-starting plate and the arc-closing plate are arranged at the two ends of the corresponding weld.

[0009] Optionally, the arc-striking plate is located at one end of the working section close to the installation section, and an arc-striking clamping block is provided on the working section. The arc-striking clamping block is detachably fixed on the working section, and the arc-striking clamping block is used to clamp the arc-striking plate onto the working section.

[0010] Optionally, the arc closing plate is located at an end of the working end away from the installation section, a sliding groove is provided on the side surface of the end of the working section away from the installation section, the direction of the sliding groove is parallel to the length direction of the strip groove, the working section is provided with a slider sliding along the sliding groove, the slider is fixedly connected with an arc closing pre-tightening block, the arc closing pre-tightening block is provided with a clamping groove matching the arc closing plate, and when the arc closing plate is located in the clamping groove, the arc closing plate fits the side of the working section facing the weld of the W-shaped metal sealing ring blank;

[0011] A bracket is detachably mounted on one end of the working section away from the mounting section, and a pre-tightening bolt is threadedly connected to the bracket. The pre-tightening bolt abuts against the end surface of the receiving arc pre-tightening block or the sliding block facing away from the mounting section.

[0012] Optionally, a copper bar is installed in the strip groove, a groove corresponding to the welding seam is provided on the copper bar, a plurality of through holes are provided at the bottom of the groove, and the plurality of through holes are spaced apart and distributed along the length direction of the strip groove.

[0013] Optionally, the arc starting plate, arc ending plate and the W-shaped metal sealing ring blank are made of the same material.

[0014] Optionally, the fixture for laser welding of the W-shaped metal sealing ring blank of an aircraft engine also includes a base, which is assembled and connected to the laser welding equipment via a vertical mounting surface, and the base is fixed to the top surface of the base.

[0015] Optionally, the pressure plate includes a left pressure plate and a right pressure plate, the left pressure plate and the right pressure plate are arranged at intervals, the interval space between the left pressure plate and the right pressure plate serves as the hollow area, and the left pressure plate and the right pressure plate are fixed on the lifting mechanism.

[0016] In summary, this application includes the following beneficial technical effects:

[0017] This embodiment significantly improves the process stability of laser welding of W-shaped sealing rings of aircraft engines through modular design, precise heat dissipation control and a quick clamping mechanism, and is suitable for mass production scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the overall structure of the fixture for laser welding of a W-shaped metal sealing ring blank for an aircraft engine in this application;

[0020] Figure 2 This is a schematic diagram of the structure of the base, arc-starting plate, copper strip and arc-ending plate assembled in this application;

[0021] Figure 3 This is a schematic diagram of the structure of the base of this application;

[0022] Figure 4 This is a schematic diagram of the structure of the copper strip in this application;

[0023] Figure 5 This is a schematic diagram of the structure of the arc closing preload block and the slider in this application;

[0024] Figure 6 This is a structural schematic diagram of the arc closing preload block and slider from another perspective of this application.

[0025] Explanation of the reference numerals in the accompanying drawings: 1. base; 2. pedestal; 21. mounting section; 22. working section; 23. strip groove; 3. W-shaped metal sealing ring blank; 4. arc-starting plate; 41. arc-starting clamping block; 5. arc-closing plate; 51. slide groove; 52. slider; 53. arc-closing pre-tightening block; 54. slot; 55. bracket; 56. pre-tightening bolt; 6. copper strip; 61. through hole; 7. left pressure plate; 71. right pressure plate. DETAILED DESCRIPTION

[0026] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0027] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0028] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0029] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show the components related to the present application rather than being drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0030] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects described may be practiced without these specific details.

[0031] An embodiment of the present application provides a fixture for laser welding of a W-shaped metal sealing ring blank for an aircraft engine.

[0032] like Figures 1 to 3As shown, a fixture for laser welding of W-shaped metal sealing ring blanks of aircraft engines includes a base 2 and a pressure plate, wherein the base 2 includes a mounting section 21 and a working section 22 connected in sequence, wherein the mounting section 21 is mounted on a laser welding device, and an end of the working section 22 away from the mounting section 21 is used to pass through the W-shaped metal sealing ring blank 3, wherein a strip groove 23 is provided on the working section 22, wherein the strip groove 23 corresponds to the weld of the W-shaped metal sealing ring blank 3, and the pressure plate is used to press parts on both sides of the weld of the W-shaped metal sealing ring blank 3 onto the working section 22, and wherein a hollow area corresponding to the weld of the W-shaped metal sealing ring blank 3 is provided on the pressure plate.

[0033] An arc-starting plate 4 fixed on the base 2 is provided at one end of the strip groove 23, and an arc-closing plate 5 fixed on the base 2 is provided at the other end of the strip groove 23. The arc-starting plate 4 abuts against one end surface of the W-shaped metal sealing ring blank 3, and the arc-closing plate 5 abuts against the other end surface of the W-shaped metal sealing ring blank 3, and the arc-starting plate 4 and the arc-closing plate 5 are arranged at the two ends of the corresponding weld.

[0034] The fixture for laser welding of the W-shaped metal sealing ring blank of an aircraft engine also includes a base 1, which is assembled and connected with the laser welding equipment through a vertical mounting surface, and the base 2 is fixed to the top surface of the base 1. After the W-shaped metal sealing ring blank 3 is sleeved on the outer periphery of the working section 22, the upper surface of the W-shaped metal sealing ring blank 3 and the working section 22 are in contact.

[0035] The base 1 provides support for the entire set of fixtures, and the working section 22 provides a working surface for welding the W-shaped metal sealing ring blank 3. The pressing plate presses the W-shaped metal sealing ring blank 3 onto the working surface.

[0036] The pressing plate includes a left pressing plate 7 and a right pressing plate 71, the left pressing plate 7 and the right pressing plate 71 are arranged at intervals, the interval space between the left pressing plate 7 and the right pressing plate 71 is used as the hollow area, and the left pressing plate 7 and the right pressing plate 71 are fixed on the lifting mechanism. The pressing force of the pressing plate on the workpiece can be controlled by the lifting mechanism.

[0037] The arc-striking plate 4 is located at one end of the working section 22 close to the mounting section 21 , and an arc-striking clamping block 41 is provided on the working section 22 . The arc-striking clamping block 41 is detachably fixed to the working section 22 by bolts, and the arc-striking clamping block 41 is used to clamp the arc-striking plate 4 onto the working section 22 .

[0038] like Figure 2 , Figure 3 , Figure 5 and Figure 6As shown, the arc closing plate 5 is located at the end of the working end away from the mounting section 21, and a slide groove 51 is provided on the side surface of the end of the working section 22 away from the mounting section 21, and the direction of the slide groove 51 is parallel to the length direction of the strip groove 23, and a slider 52 sliding along the slide groove 51 is provided on the working section 22, and an arc closing pre-tightening block 53 is fixedly connected to the slider 52, and a groove 54 cooperating with the arc closing plate 5 is provided on the slider 52. When the arc closing plate 5 is located in the groove 54, the arc closing plate 5 fits the side of the weld of the working section 22 facing the W-shaped metal sealing ring blank 3; a bracket 55 is detachably installed at the end of the working section 22 away from the mounting section 21, and a pre-tightening bolt 56 is threaded on the bracket 55, and the pre-tightening bolt 56 abuts against the end face of the arc closing pre-tightening block 53 or the slider 52 facing away from the mounting section 21. By tightening the pre-tightening bolts 56 , it can be ensured that the arc-starting plate 4 and the arc-ending plate 5 stably abut against the two ends of the W-shaped metal sealing ring blank 3 .

[0039] like Figures 2 to 4 As shown, a copper strip 6 is installed in the strip groove 23, and a groove corresponding to the weld is provided on the copper strip 6, and a plurality of through holes 61 are provided at the bottom of the groove, and the plurality of through holes 61 are distributed at intervals along the length direction of the strip groove 23. In the embodiment of the present application, the portions on both sides of the weld of the W-shaped metal sealing ring blank 3 are in direct contact with the copper strip 6. The copper strip 6 is used to dissipate heat during welding.

[0040] In one embodiment, the arc-starting plate 4 and arc-ending plate 5 are made of the same material as the W-shaped metal sealing ring blank 3, and the same material as the workpiece, such as GH4169 high-temperature alloy, and the thickness is 1.5 times the wall thickness of the workpiece to avoid spatter or unfused defects during arc starting / ending. The remaining components can be made of ordinary carbon steel, alloy steel, stainless steel, etc., while ensuring the rigidity and economy of the fixture.

[0041] The working process of welding using the laser welding fixture for W-shaped metal sealing ring blank of the aircraft engine of the present application is as follows:

[0042] Installation and unloading of the fixture. Install the metal sealing ring laser welding fixture on the equipment, requiring the fixture to be tightly connected to the laser welding equipment. Install the arc starting plate 4 and the arc closing plate 5 and preliminarily pre-tighten them through the arc starting clamping block 41 and the arc closing pre-tightening block 55. Then, the left side plane of the W-shaped metal sealing ring blank is evenly fitted with the copper bar 6, the end face of the arc starting plate 4 is tightly fitted with the end face of the W-shaped metal sealing ring blank, and the W-shaped metal sealing ring blank is pressed by the left pressure plate 7. After that, the right side plane of the W-shaped metal sealing ring blank is evenly fitted with the copper plate of the base 2 and the W-shaped metal sealing ring blank is pressed by the right pressure plate 71. Adjust the pre-tightening bolt 56 so that the arc closing plate 5 is tightly fitted with the end face of the W-shaped metal sealing ring blank. After the left and right pressure plates 71 are pressed, a 2-5mm laser welding gap should be left between the two pressure plates.

[0043] (2) Laser welding of metal sealing rings. Adjust the laser welding process parameters such as duty cycle, laser power, defocusing amount, pulse width, welding speed, and shielding gas flow rate, and control the welding direction from the arc starting plate 4 to the arc closing plate 5. In one embodiment, shielding gas, such as argon gas, is introduced into the welding area through the through hole 61 on the copper strip 6 to form a shielding gas curtain, which inhibits the oxidation of the weld and removes heat through gas convection. At the same time, the copper strip 6 absorbs the heat of the molten pool to prevent thermal deformation of the workpiece. The laser parameters can be set to laser power 2kW, scanning speed 10mm / s, and spot diameter 0.6mm.

[0044] (3) Removing the workpiece. After welding is completed, the welding gun is controlled to return to the initial position. Since the left and right pressing plates 71 are connected to the moving parts, they are driven away from the workpiece by the moving parts, and the welded metal sealing ring is removed to prepare for the next welding cycle.

[0045] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A fixture for laser welding of W-shaped metal sealing ring blanks of aircraft engines, characterized in that: The invention comprises a base (2) and a pressing plate, wherein the base (2) comprises a mounting section (21) and a working section (22) connected in sequence, wherein the mounting section (21) is mounted on a laser welding device, wherein an end of the working section (22) away from the mounting section (21) is used to pass through a W-shaped metal sealing ring blank (3), wherein a strip groove (23) is provided on the working section (22), wherein the strip groove (23) corresponds to a weld of the W-shaped metal sealing ring blank (3), wherein the pressing plate is used to press portions on both sides of the weld of the W-shaped metal sealing ring blank (3) onto the working section (22), and wherein a hollow area corresponding to the weld of the W-shaped metal sealing ring blank (3) is provided on the pressing plate; An arc-starting plate (4) fixed on the base (2) is provided at one end of the strip groove (23), and an arc-closing plate (5) fixed on the base (2) is provided at the other end of the strip groove (23); the arc-starting plate (4) abuts against one end surface of the W-shaped metal sealing ring blank (3), and the arc-closing plate (5) abuts against the other end surface of the W-shaped metal sealing ring blank (3); and the arc-starting plate (4) and the arc-closing plate (5) are arranged at the two ends of the corresponding weld.

2. The laser welding fixture for W-shaped metal sealing ring blank of an aircraft engine according to claim 1 is characterized in that: The arc-striking plate (4) is located at one end of the working section (22) close to the mounting section (21); an arc-striking clamping block (41) is provided on the working section (22); the arc-striking clamping block (41) is detachably fixed on the working section (22); and the arc-striking clamping block (41) is used to clamp the arc-striking plate (4) onto the working section (22).

3. The laser welding fixture for W-shaped metal sealing ring blank of an aircraft engine according to claim 1 is characterized in that: The arc closing plate (5) is located at the end of the working end away from the installation section (21); a slide groove (51) is provided on the side surface of the end of the working section (22) away from the installation section (21); the direction of the slide groove (51) is parallel to the length direction of the strip groove (23); a slider (52) sliding along the slide groove (51) is provided on the working section (22); an arc closing pre-tightening block (53) is fixedly connected to the slider (52); a clamping groove (54) cooperating with the arc closing plate (5) is provided on the arc closing pre-tightening block (53); when the arc closing plate (5) is located in the clamping groove (54), the arc closing plate (5) is attached to the side of the working section (22) facing the weld of the W-shaped metal sealing ring blank (3); A bracket (55) is detachably mounted on one end of the working section (22) away from the mounting section (21); a pre-tightening bolt (56) is threadedly connected to the bracket (55); the pre-tightening bolt (56) abuts against an end surface of the arc pre-tightening block (53) or the sliding block (52) facing away from the mounting section (21).

4. The laser welding fixture for W-shaped metal sealing ring blank of an aircraft engine according to claim 1, characterized in that: A copper strip (6) is installed in the strip groove (23), a groove corresponding to the welding seam is provided on the copper strip (6), a plurality of through holes (61) are provided at the bottom of the groove, and the plurality of through holes (61) are distributed at intervals along the length direction of the strip groove (23).

5. The laser welding fixture for W-shaped metal sealing ring blank of an aircraft engine according to claim 1, characterized in that: The arc striking plate (4), the arc closing plate (5) and the W-shaped metal sealing ring blank (3) are made of the same material.

6. The laser welding fixture for W-shaped metal sealing ring blank of an aircraft engine according to claim 1, characterized in that: The fixture for laser welding of a W-shaped metal sealing ring blank of an aircraft engine also includes a base (1), the base (1) is assembled and connected to the laser welding equipment through a vertical mounting surface, and the base (2) is fixed on the top surface of the base (1).

7. The laser welding fixture for W-shaped metal sealing ring blank of an aircraft engine according to claim 1, characterized in that: The pressing plate comprises a left pressing plate (7) and a right pressing plate (71); the left pressing plate (7) and the right pressing plate (71) are arranged at intervals; the interval space between the left pressing plate (7) and the right pressing plate (71) serves as the hollow area; and the left pressing plate (7) and the right pressing plate (71) are fixed on the lifting mechanism.

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