Welding method of aero-engine hydraulic actuating system in argon filling box

Abstract

The invention discloses a method for welding an aero-engine hydraulic actuating system in an argon filling box, which comprises the following steps of: dividing the whole welding process into four sections, carrying out sectional welding, and reasonably distributing the welding times of each welding joint circumferential weld and the welding quantity of each welding joint circumferential weld at each station, the problems that due to the fact that an assembly is complex in structure, pipes are mutually staggered, and the distance between connectors, the distance between the connectors and the pipes and the distance between the connectors and structural parts are small, partial positions of the welding positions of the pipe connectors are interfered and shielded are solved, the one-time welding qualification rate is increased, the number of times of repair welding of welding seams is reduced, machining efficiency is effectively improved, and the machining period is shortened.

Description

Technical Field

[0001] The present invention belongs to the technical field of engine hydraulic actuating systems, and relates to a welding method for an aero-engine hydraulic actuating system in an argon-filled box. Background Art

[0002] The hydraulic actuating system of a certain aircraft (see Appendix Figure 1 ) is welded and connected by an actuator cylinder 1, a hook 2, a pin 3, a pipe one 4, a pipe two 5, a pipe three 6, a pipe four 7, a hinge one 8, a hinge two 9 and a valve 10 through argon arc welding. The materials of the welding parts are all titanium alloy, and there are 52 argon arc welding circumferential welds in total.

[0003] The hydraulic actuating system consists of 9 each of pipe one 4 and pipe two 5 welded on the actuator cylinder 1, 2 each of pipe three 6 and pipe four 7, 1 each of hinge one 8 and hinge two 9 and 2 valves 10. The component structure is complex, the pipes are interlaced with each other, and the distance between joints, between joints and pipes, and between joints and structural parts is small, which makes some positions of the butt welding joints of the pipe joints subject to interference and occlusion, and the welding difficulty is extremely high; the materials of the welding positions of the parts are all titanium alloy, and the welding is prone to oxidation, and the back of the welding position cannot be protected. The components need to be welded by argon arc welding in a vacuum argon-filled box. When welding the components in the narrow space of the vacuum argon-filled box, due to the limitation of the window of the vacuum argon-filled box cabin, it is not easy to observe the circumferential welds of the joints comprehensively, and there are blind welds in some local weld positions. And due to the limitation of the welding position and the operating space, the welding accessibility is poor, and the circumferential welds of the same joint cannot be completed in one welding at the same station. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems in the prior art that when welding the hydraulic actuating system of a certain aircraft, the welding space is narrow, it is not easy to observe the circumferential welds of the joints comprehensively, there are blind welds in some local weld positions, the welding accessibility is poor, and the component structure is complex, the pipes are interlaced with each other, and the distance between joints, between joints and pipes, and between joints and structural parts is small, resulting in interference and occlusion at the welding positions during welding and great welding difficulty. The present invention provides a welding method for an aero-engine hydraulic actuating system in an argon-filled box. By designing reasonable welding stations in the vacuum argon-filled box, the number of welding times for each welded joint circumferential weld, and the welding amount of each welded joint circumferential weld at each station, it is ensured that the components are welded smoothly and the requirements of the drawings are guaranteed.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A welding method for an aero-engine hydraulic actuating system in an argon-filled box includes the following steps:

[0007] Step 1: Perform the first welding on the circumferential welds of the pipe joints to be welded to form a first welding section;

[0008] Step 2: Perform a second welding on the circumferential weld of the pipe joint to be welded to form a second welding section, and the adjacent ends of the first welding section and the second welding section are overlapped and connected;

[0009] Step 3: Perform a third welding on the circumferential weld of the pipe joint to be welded to form a third welding section, and the adjacent ends of the second welding section and the third welding section are overlapped and connected;

[0010] Step 4: Repeat Steps 1-3 to weld other circumferential welds of the pipe joints;

[0011] Step 5: Perform a fourth welding on all the circumferential welds of the pipe joints in sequence to form a fourth welding section;

[0012] One end of the fourth welding section coincides with the third welding section, and the other end coincides with the first welding section.

[0013] This technology solves the problems of interference and occlusion at some positions of the welded joints of the pipe joints caused by the complex structure of the components, the interlacing of the pipes, and the small spacing between the joints, between the joints and the pipes, and between the joints and the structural parts; it solves the problems of blind welding at the local weld positions and poor weld accessibility during welding in the narrow space of the vacuum argon filling box. It improves the qualified rate of the first welding, reduces the number of weld repair times, effectively improves the processing efficiency, and shortens the processing cycle.

[0014] Further, during the first welding, the welding length is one-third to two-fifths of the length of the entire circumferential weld.

[0015] Further, during the second welding, the welding length is one-third to two-fifths of the length of the entire circumferential weld;

[0016] The overlapping length of the first welding section and the second welding section is one-sixteenth to one-eighth of the length of the entire circumferential weld.

[0017] Further, during the third welding, the welding length is one-third to two-fifths of the length of the entire circumferential weld;

[0018] The overlapping length of the third welding section and the second welding section is one-sixteenth to one-eighth of the length of the entire circumferential weld.

[0019] Further, during the fourth welding, the welding length is one-third to two-fifths of the length of the entire circumferential weld;

[0020] The overlapping length of the fourth welding section and the first welding section is one-sixteenth to one-eighth of the length of the entire circumferential weld;

[0021] The overlapping length of the fourth welding section and the third welding section is one-sixteenth to one-eighth of the length of the entire circumferential weld.

[0022] Further, step 1 also includes: assembling the parts, welding fixtures and the rotary table of the vacuum argon filling box;

[0023] When performing the first welding, second welding and third welding, the rotary table of the vacuum argon filling box is placed horizontally;

[0024] When performing the fourth welding, the rotary table of the vacuum argon filling box is placed obliquely.

[0025] Further, when the rotary table of the vacuum argon filling box is placed obliquely, the inclination angle is 100° - 110°.

[0026] Further, working windows are opened on both the side and the front of the vacuum argon filling box.

[0027] When performing the first welding, second welding and third welding, welding is carried out through the working window on the side of the vacuum argon filling box.

[0028] When performing the fourth welding, welding is carried out through the working window opened in the front of the vacuum argon filling box.

[0029] Further, when the rotary table of the vacuum argon filling box is placed obliquely, the included angle between the rotary table and the horizontal plane in the front of the vacuum argon filling box is 100° - 110°.

[0030] An aero - engine hydraulic actuation system is welded by the welding method according to any one of the present invention.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The present invention discloses a welding method of an aero - engine hydraulic actuation system in an argon - filled box. The whole welding process is divided into four sections for segmented welding. By reasonably allocating the welding times of each welded joint circumferential weld and the welding amount of each welded joint circumferential weld at each working station, the problem that some positions of the welded joints of the pipe joints are interfered and blocked due to the complex structure of the components, the interlacing of pipes with each other, and the small spacing between joints and joints, joints and pipes, and joints and structural parts is solved. The qualified rate of the first - time welding is improved, the number of weld repair times is reduced, the processing efficiency is effectively improved, and the processing cycle is shortened.

[0033] Further, working windows are opened on both the side and the front of the vacuum argon filling box. During the first three weldings, the welding position is adjusted through the rotary table, and during the fourth welding, the worktable is flipped and welding is carried out through the working window in the front, solving the problems of blind welding and poor weldability of local weld positions during welding of components in the narrow space of the vacuum argon filling box.

[0034] The present invention also discloses a hydraulic actuation system for an aeroengine, which is welded by the present method. The obtained device has a high qualification rate, high processing efficiency, and short processing cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0036] Figure 1 It is a structure diagram of a part to be welded according to the present invention;

[0037] Figure 2 It is a schematic diagram of the segmented welding positions according to the present invention;

[0038] Figure 3 It is a schematic diagram of the window on the front of the vacuum argon filling box according to the present invention;

[0039] Figure 4 It is according to the present invention Figure 3 Schematic view in the direction A of.

[0040] Wherein: 1 - actuator cylinder; 2 - lifting hook; 3 - pin; 4 - pipe one; 5 - pipe two; 6 - pipe three; 7 - pipe four; 8 - hinge one; 9 - hinge two; 10 - valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0043] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0044] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper", "lower", "horizontal", "inner", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invention product is usually placed during use. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0045] In addition, if the term "horizontal" appears, it does not mean that the component is required to be absolutely horizontal, but it can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but it can be slightly inclined.

[0046] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and limited, if terms such as "set", "installed", "connected", "connected" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0047] The following further describes the present invention in detail with reference to the drawings:

[0048] See Figure 1 , an embodiment of the present invention discloses a welding method of an aeroengine hydraulic actuation system in an argon-filled box. By designing a reasonable welding station in the vacuum argon-filled box, the number of welding passes for each welded joint circumferential weld, and the welding amount of each welded joint circumferential weld at each station, it is ensured that the components are successfully welded to meet the drawing requirements. The corresponding welding in this embodiment is for a certain aeroengine hydraulic actuation system, which includes an actuator cylinder 1, a lifting hook 2, a pin 3, a pipe 1 4, a pipe 2 5, a pipe 3 6, a pipe 4 7, a hinge 1 8, a hinge 2 9, and a valve 10. Different numbers of connecting pipes are welded on each actuator cylinder 1 according to requirements. The component structure is complex, the pipes are interlaced with each other, and the distance between joints, between joints and pipes, and between joints and structural parts is small.

[0049] During welding, the specific steps are as follows:

[0050] Embodiment 1

[0051] A welding method of an aeroengine hydraulic actuation system in an argon-filled box includes the following steps:

[0052] Step 1: Perform the first welding on the circumferential weld of the pipe joint to be welded to form the first welding section;

[0053] Step 2: Perform the second welding on the circumferential weld of the pipe joint to be welded to form the second welding section, and the adjacent ends of the first welding section and the second welding section are overlapped and connected;

[0054] Step 3: Perform the third welding on the circumferential weld of the pipe joint to be welded to form the third welding section, and the adjacent ends of the second welding section and the third welding section are overlapped and connected;

[0055] Step 4: Repeat Steps 1 - 3 to weld the circumferential welds of other pipe joints;

[0056] Step 5: Perform the fourth welding on all the circumferential welds of the pipe joints in sequence to form the fourth welding section;

[0057] One end of the fourth welding section coincides with the third welding section, and the other end coincides with the first welding section.

[0058] Embodiment 2

[0059] A welding method of an aero - engine hydraulic actuation system in an argon - filled box, comprising the following steps:

[0060] Step 1,

[0061] Step 1.1, Clamp the parts:

[0062] Place the rotary table of the vacuum argon - filled box in the horizontal position, place the welding fixture assembled with components on the rotary table, press the welding fixture through the T - slot of the rotary table, and close the hatch of the vacuum argon - filled box.

[0063] In this embodiment, the workbench inside the vacuum argon - filled box can rotate circumferentially inside the vacuum argon - filled box. When the operator stands at the window for welding, different welding requirements can be met by rotating the workbench.

[0064] Step 1.2, Adjust the position of the rotary table:

[0065] After the vacuum argon - filled box is evacuated and filled with argon, adjust the height and left - right position of the rotary table to ensure that welding can be performed at the left - window position of the vacuum argon - filled box cabin. See Figure 4 .

[0066] Step 2, Welding at the left - window position:

[0067] Weld the circumferential weld of the pipe joint at the left window of the argon - filled box. See Figure 4 , specifically:

[0068] Step 2.1: Perform the first welding on the circumferential weld of the pipe joint to be welded to form the first welding section;

[0069] Specifically, it includes:

[0070] First, rotate the workbench to turn the pipe joint to be welded to a reachable position on the left side of the operator. Adjust the welding torch to a suitable position for welding. The length of the first welding is about one-third to two-fifths of the length of the entire circumferential weld (specifically, welding clockwise from the 1 o'clock position to the 5 o'clock position). See the first welding section in Figure 2

[0071] Step 2.2: Perform a second welding on the circumferential weld of the pipe joint to be welded to form a second welding section. The end portions of the first welding section and the second welding section that are close to each other are overlapped and connected;

[0072] Specifically, it includes:

[0073] Rotate the workbench counterclockwise to rotate the welding joint to a position directly in front of the operator. Adjust the welding torch to a suitable position for the second welding.

[0074] The length of the second welding is about one-third to two-fifths of the length of the entire circumferential weld (welding clockwise from the 4 o'clock position to the 8 o'clock position). The overlapping length with the first welding weld section is about one-sixteenth to one-eighth of the length of the entire circumferential weld (about 3 - 5 mm). See the second welding section in Figure 2

[0075] Specifically, this embodiment discloses that the overlapping length of the second welding length with the first welding weld section is about 4 mm.

[0076] Step 2.3: Perform a third welding on the circumferential weld of the pipe joint to be welded to form a third welding section. The end portions of the second welding section and the third welding section that are close to each other are overlapped and connected;

[0077] Specifically, it includes:

[0078] Rotate the workbench counterclockwise to rotate the welding joint to a reachable position on the right side of the operator. Adjust the welding torch to a suitable position for the third welding.

[0079] The length of the third welding is about one-third to two-fifths of the length of the entire circumferential weld (welding clockwise from the 7 o'clock position to the 11 o'clock position). The overlapping length of the third welding length with the second welding weld section is one-sixteenth to one-eighth of the length of the entire circumferential weld (about 3 - 5 mm). See the third welding section in Figure 2

[0080] Furthermore, the overlapping length of the third welding length with the second welding weld section is 4 mm.

[0081] ​​​Further, in the left window of the vacuum argon filling box, the total length of the weld seam is welded three times for 5 / 6 of the total length (from the 1 o'clock position to the 11 o'clock position).

[0082] In this step, the left window is on the left side with the front of the vacuum argon filling box hatch as the reference point. In this embodiment, there is no limitation on the left or right of the window, as long as it can meet the welding of internal parts, it can be on either side.

[0083] Further, in this embodiment, the workbench inside the vacuum argon filling box can rotate circumferentially. When welding at the window, the workbench can be rotated to cooperate with the segmented welding process to ensure that all weld positions can be observed, avoiding the problem of blind welding.

[0084] Step 3: Repeat steps 3.1 - 3.3 to weld other pipe joint circumferential welds.

[0085] Step 4: Perform the fourth welding on all pipe joint circumferential welds in sequence to form the fourth welding section;

[0086] One end of the fourth welding section coincides with the third welding section, and the other end coincides with the first welding section.

[0087] Specifically, it includes:

[0088] (1) Replace the welding station:

[0089] Translate the workbench to the middle position of the vacuum argon filling box, flip the workbench so that the surface of the workbench forms an angle of about 100° - 110° with the horizontal plane in front of the vacuum argon filling box, and rotate the workbench to turn the joint to be welded to the middle position directly below the window of the vacuum argon filling box. See Figure 3 , move the workbench forward and adjust the height of the workbench so that the welding area is convenient for observation and welding.

[0090] (2) Welding at the position directly below the window:

[0091] Complete the fourth welding of the pipe joint circumferential weld at the window directly below the argon filling box. See Figure 3 , during welding, the overlapping length of the fourth welding with the first and third welding weld sections is one-sixteenth to one-eighth of the total length of the circumferential weld (taking a certain aeroengine hydraulic actuation system in this embodiment as an example, the overlapping length of the fourth welding with the first welding is about 3 - 5 mm), that is, the welding amount of the fourth welding of the pipe joint is one-third to two-fifths of the total length of the circumferential weld (welding clockwise from the 10 o'clock position to the 2 o'clock position). See Figure 2 the fourth welding section in

[0092] Specifically, in this embodiment, during the fourth welding, the overlapping length between the fourth welding section and the first welding section is 4 mm;

[0093] The overlapping length between the fourth welding section and the third welding section is 4 mm;

[0094] Step 5, disassemble the parts:

[0095] After all the pipe joints are welded, open the hatch of the argon filling box, turn the workbench to the horizontal position, and disassemble the parts.

[0096] A welding method for a narrow space in an argon filling box of an aero-engine hydraulic actuation system solves the problems of interference and occlusion at some positions of the welded joints of pipe joints caused by the complex structure of components, the interlacing of pipes, and the small spacing between joints, between joints and pipes, and between joints and structural parts; solves the problems of blind welding at local weld positions and poor weld accessibility during welding of components in the narrow space of the argon filling box. It improves the qualified rate of one-time welding, reduces the number of weld repairs, effectively improves the processing efficiency, and shortens the processing cycle.

[0097] An embodiment of the present invention discloses an aero-engine hydraulic actuation system welded based on the welding method described in the embodiment of the present invention.

[0098] The aero-engine hydraulic actuation system disclosed in this embodiment includes an actuating cylinder 1, a lifting hook 2, a pin 3, a pipe one 4, a pipe two 5, a pipe three 6, a pipe four 7, a hinge one 8, a hinge two 9, and a valve 10, which are welded and connected by argon arc welding. The materials of the welded parts are all titanium alloys, and there are a total of 52 argon arc welding circumferential welds.

[0099] The qualified rate of the aero-engine hydraulic actuation system welded by the method of this embodiment is high, and the processing efficiency during the welding process is high.

[0100] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A welding method for an aircraft engine hydraulic actuation system in an argon-filled box, characterized in that: The following steps are involved: Step 1: Perform the first welding on the girth weld of the pipe joint to be welded to form the first welding section; Step 2: performing a second welding on the girth weld of the pipe joint to be welded to form a second welding section, wherein the adjacent ends of the first welding section and the second welding section are overlapped and connected; Step 3: welding the girth weld of the pipe joint to be welded for the third time to form a third welding section, and the adjacent ends of the second welding section and the third welding section are overlapped and connected; Step 4: Repeat steps 1-3 to weld the girth welds of other pipe joints; Step 5: welding all the pipe joint girth welds for the fourth time in sequence to form a fourth welding section; One end of the fourth welding section overlaps with the third welding section, and the other end overlaps with the first welding section.

2. The welding method of an aircraft engine hydraulic actuation system in an argon-filled box according to claim 1, characterized in that: During the first welding, the welding length is one third to two fifths of the length of the entire weld.

3. The welding method of an aircraft engine hydraulic actuation system in an argon-filled box according to claim 1, characterized in that: During the second welding, the welding length is one third to two fifths of the length of the entire weld; The overlapping length of the first welding section and the second welding section is one sixteenth to one eighth of the length of the entire weld.

4. The welding method of an aircraft engine hydraulic actuation system in an argon-filled box according to claim 1, characterized in that: During the third welding, the welding length is one third to two fifths of the length of the entire weld; The overlapping length of the third welding section and the second welding section is one sixteenth to one eighth of the length of the entire weld.

5. The welding method of an aircraft engine hydraulic actuation system in an argon-filled box according to claim 1, characterized in that: During the fourth welding, the welding length is one third to two fifths of the length of the entire weld; The overlapping length of the fourth welding section and the first welding section is one sixteenth to one eighth of the length of the entire weld; The overlapping length of the fourth welding section and the third welding section is one sixteenth to one eighth of the length of the entire weld.

6. The welding method of an aircraft engine hydraulic actuation system in an argon-filled box according to claim 1, characterized in that: The step 1 also includes: assembling the parts, the welding fixture and the rotary table of the vacuum argon-filled box; When performing the first welding, the second welding and the third welding, the rotary table of the vacuum argon filling box is placed horizontally; When the fourth welding was performed, the rotary table of the vacuum argon filling box was in an inclined position.

7. The welding method of an aircraft engine hydraulic actuation system in an argon-filled box according to claim 6, characterized in that: When the rotary table of the vacuum argon filling box is tilted, the tilt angle is 100°-110°.

8. The welding method of an aircraft engine hydraulic actuation system in an argon-filled box according to claim 6, characterized in that: The vacuum argon filling box has working windows on one side and in the front. The first welding, the second welding and the third welding are all performed through the working window on one side of the vacuum argon filling box; When performing the fourth welding, welding is performed through a working window opened just in front of the vacuum argon filling box.

9. The welding method of an aircraft engine hydraulic actuation system in an argon-filled box according to claim 8, characterized in that: When the rotary table of the vacuum argon filling box is placed at an angle, the angle between the rotary table and the horizontal plane in front of the vacuum argon filling box is 100°-110°.

10. An aircraft engine hydraulic actuation system, characterized in that: The method is welded based on the welding method described in any one of claims 1 to 9.

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