A fixture for thrust chamber assembly welding parts

Abstract

The present invention relates to the field of thrust chamber assembly welding technology, specifically a fixture for thrust chamber assembly welding. The fixture comprises an internal support structure, an external clamping device, and an axial locking structure. The internal support structure is positioned within a rotating body to prevent welding deformation. The external clamping device is positioned outside a thin-walled component to ensure clearance between the thin-walled component and the rotating body. The axial locking structure is positioned on both end surfaces of the rotating body for mounting on electron beam equipment. This fixture addresses the stringent requirements for workpiece assembly during electron beam welding, improves workpiece assembly precision and operability, controls welding deformation, and enhances electron beam weld quality.

Description

Technical Field

[0001] The present invention relates to the technical field of thrust chamber assembly welding, and in particular to a tooling fixture used for thrust chamber assembly welding parts. Background Art

[0002] A key component of the thrust chamber is a thin-walled rotating body structure, such as Figure 1 and Figure 2 As shown, the outer contour of the rotating body 2 is a curved surface structure, and a thin-walled part 1 is welded on the outer wall of the contour. The thin-walled part 1 is a segmented structure, which is formed by splicing two halves.

[0003] Argon arc welding is used for the longitudinal welds at the joints, and at the same time, there are two radial electron beam welds on the outer wall of the thin-walled part 1. This electron beam weld is a lap structure. It is necessary to ensure that the weld penetrates the thin-walled part 1 and is welded to the rotating body 2, and meets the weld grade I qualification standard; to ensure the quality of the electron beam weld, the assembly gap between the thin-walled part 1 and the rotating body 2 must be ≤0.2-0.8mm, and the thin-walled part 1 must be located in the assembly position of the outer wall of the rotating body 2; welding deformation will occur during the electron beam welding process, resulting in poor roundness of the rotating body 2 and poor consistency in the penetration depth of the entire weld; the electron gun of the electron beam equipment is a high-voltage fixed gun that emits an electron beam vertically to the ground. The workpiece axis must be clamped parallel to the ground to achieve welding of radial circumferential welds.

[0004] In order to meet the high quality and reliability requirements of the thrust chamber assembly welds, it is necessary to design a tooling fixture to solve the above technical difficulties. Summary of the Invention

[0005] In order to solve the above problems, the present invention provides a tooling fixture for thrust chamber assembly welding parts. The thrust chamber assembly welding parts tooling fixture solves the strict requirements of electron beam welding on the assembly state of the workpiece, improves the assembly accuracy and operability of the workpiece, controls welding deformation, and improves the quality of electron beam welds.

[0006] The technical solutions of the present invention are as follows:

[0007] A thrust chamber assembly welded component consists of a thin-walled part and a rotating body. The rotating body is a thin shell-like structure consisting of a straight cylinder section, a first conical cylinder section, a rounded transition section and a second conical cylinder section. The diameter of the first conical cylinder section gradually decreases from top to bottom, and the diameter of the second conical cylinder section gradually decreases from bottom to top. The intersection of the first conical cylinder section and the second conical cylinder section is set as a rounded transition section. The two halves are spliced ​​with thin-walled parts that fit the outer contour of the rotating body and welded to the rotating body. The splicing is a longitudinal weld. The first conical cylinder section and the second conical cylinder section are also fixedly connected to the thin-walled parts through radial welds. The radial welds are welded to the overlapping structure of the rotating body through the thin-walled parts.

[0008] A tooling fixture for thrust chamber assembly welding parts includes an internal support structure, an external clamping and fixing device, and an axial locking structure. The internal support structure is arranged inside a rotating body to prevent welding deformation, the external clamping and fixing device is arranged outside a thin-walled part to ensure a gap between the thin-walled part and the rotating body, and the axial locking structure is arranged on both end faces of the rotating body for installation on an electron beam device.

[0009] The internal support structure includes inner support plate 1, inner support plate 2, inner support plate 3 and inner support plate 4. The outer contours of inner support plate 1 and inner support plate 2 are aligned with the inner contour of the first cone section, and the outer contours of inner support plate 3 and inner support plate 4 are aligned with the inner contour of the second cone section. Inner support plate 1, inner support plate 2, inner support plate 3 and inner support plate 4 are fixedly connected by connecting screw 1, connecting screw 2 and connecting screw 3 respectively.

[0010] The external clamping and fixing device includes a clamping block A and a clamping block B. Several clamping blocks A and clamping blocks B that fit the outer contour of the thin-walled part are evenly installed in the upper and lower middle parts of the thin-walled part respectively. The clamping blocks A and clamping blocks B are fixed to the thin-walled part respectively by tightening belts.

[0011] The tightening belt is a steel belt or a packing belt.

[0012] The axial locking structure includes an upper cover and a bottom plate. The upper cover and the bottom plate are respectively attached to the two end surfaces of the rotating body. The upper cover and the bottom plate are fixedly connected by a connecting shaft.

[0013] The beneficial effects of the present invention are:

[0014] 1. The present invention discloses a fixture for thrust chamber assembly welding parts. The setting of the internal support structure of the thrust chamber assembly welding parts fixture effectively prevents the deformation of the rotating body during welding, ensuring the roundness and overall structural stability of the thrust chamber assembly welding parts; the use of the external clamping and fixing device ensures that the assembly gap between the thin-walled parts and the rotating body is within the range of ≤0.2-0.8mm, while ensuring the accurate assembly position of the thin-walled parts on the outer wall of the rotating body, thereby improving the quality and reliability of the weld; the design of the axial locking structure enables the workpiece axis to be clamped parallel to the ground, meeting the requirement that the high-voltage fixed gun of the electron beam equipment emits the electron beam perpendicular to the ground, and achieving the goal of welding radial circumferential welds.

[0015] 2. The present invention discloses a fixture for thrust chamber assembly welding parts. The thrust chamber assembly welding parts fixture ensures the stability and reliability of the internal support structure through the fit of inner support plate 1, inner support plate 2, inner support plate 3 and inner support plate 4 to the internal contour of the rotating body, and the fixed connection of connecting screw 1, connecting screw 2 and connecting screw 3.

[0016] 3. The present invention discloses a fixture for thrust chamber assembly welding parts. The clamping blocks A and B of the thrust chamber assembly welding parts fixture fit the outer contour of the thin-walled parts, and the use of tightening belts achieves effective clamping and fixation of the thin-walled parts, ensuring the accuracy of the assembly gap and assembly position.

[0017] 4. The present invention discloses a fixture for thrust chamber assembly welding parts. The tightening belt of the thrust chamber assembly welding parts fixture adopts steel belt or strapping belt, which has sufficient strength and rigidity to meet the requirements of clamping and fixing.

[0018] 5. The present invention discloses a fixture for thrust chamber assembly welding parts. The upper cover and bottom plate of the thrust chamber assembly welding parts fixture are fitted with the end face of the rotating body, and the connecting shaft is fixedly connected, thereby realizing axial locking and fixation of the thrust chamber assembly welding parts, and ensuring the stability and reliability of the workpiece during the welding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By reading the detailed description of the preferred embodiment below, the solutions and advantages of the present application will become clear to those skilled in the art. The accompanying drawings are only for illustrating the preferred embodiment and are not to be considered as limiting the present invention.

[0020] In the attached figure:

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of a thrust chamber assembly weldment before assembly welding according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of a thrust chamber assembly weldment after assembly welding according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the external structure of a thrust chamber assembly weldment and a fixture after assembly according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic cross-sectional view of a thrust chamber assembly weldment and a fixture after assembly according to an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the three-dimensional structure of the internal support structure of a fixture for thrust chamber assembly welding parts according to an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the three-dimensional structure of an external clamping and fixing device of a fixture for thrust chamber assembly welding parts according to an embodiment of the present invention;

[0027] Figure 7 for Figure 6 A partially enlarged cross-sectional view;

[0028] Figure 8 This is a schematic diagram of the three-dimensional appearance of an axial locking structure of a fixture for a thrust chamber assembly weldment according to an embodiment of the present invention;

[0029] The components represented by the reference numerals in the figure are:

[0030] The present invention: 1. thin-walled part, 11. radial weld, 12. longitudinal weld, 2. rotating body, 21. straight cylinder section, 22. first conical cylinder section, 23. rounded transition section, 24. second conical cylinder section, 3. internal support structure, 31. inner support plate one, 32. inner support plate two, 33. inner support plate three, 34. inner support plate four, 35. connecting screw one, 36. connecting screw two, 37. connecting screw three, 4. external clamping and fixing device, 41. clamping block A, 42. clamping block B, 43. tightening belt, 5. axial locking structure, 51. upper cover, 52. bottom plate, 53. zero-point quick clamp. DETAILED DESCRIPTION Example

[0031] like Figure 1 and Figure 2 As shown, the thrust chamber assembly weldment mainly consists of a thin-walled part 1 and a rotating body 2.

[0032] The rotating body 2 is a thin shell structure, which is specifically formed by sequentially connecting a straight cylinder section 21, a first conical cylinder section 22, a rounded transition section 23 and a second conical cylinder section 24.

[0033] The straight cylindrical section 21 has a constant diameter and serves as the base of the rotating body.

[0034] The diameter of the first conical cylinder section 22 gradually decreases from top to bottom, forming a cone-shaped structure.

[0035] The rounded transition section 23 connects the first conical cylinder section 22 and the second conical cylinder section 24 to ensure a smooth transition and reduce stress concentration.

[0036] The diameter of the second conical cylinder section 24 gradually decreases from bottom to top.

[0037] The thin-walled part 1 is a two-half structure. The two halves of the thin-walled part 1 that fit the outer contour of the rotating body 2 are spliced ​​and welded to the rotating body 2. The splicing point is a longitudinal weld 12. The first conical cylinder section 22 and the second conical cylinder section 24 are also fixedly connected to the thin-walled part 1 through radial welds 11 respectively. The radial weld 11 is a lap joint structure in which the weld penetrates the thin-walled part 1 and is welded to the rotating body 2.

[0038] The thrust chamber assembly weldment fixture is used to fix and support the thrust chamber assembly weldment to ensure stability and accuracy during the welding process. Figure 3 and Figure 4 As shown, the fixture mainly includes an internal supporting structure 3, an external clamping device 4 and an axial locking structure 5.

[0039] The internal support structure 3 includes an inner support plate 1 31 , an inner support plate 2 32 , an inner support plate 33 and an inner support plate 4 34 .

[0040] The outer contours of the inner support plate 1 31 and the inner support plate 2 32 fit the inner contour of the first cone section 22 to provide support.

[0041] The outer contours of the inner support plate three 33 and the inner support plate four 34 fit the inner contour of the second cone section 24 and also provide support.

[0042] These inner support plates are fixedly connected by connecting screw rod 1 35 , connecting screw rod 2 36 and connecting screw rod 3 37 to form a stable internal support system.

[0043] like Figure 6 and Figure 7 As shown, the external clamping and fixing device 4 includes a clamping block A41 and a clamping block B42, which are respectively installed at the upper middle part and the lower middle part of the thin-walled part 1.

[0044] The number and positions of the clamping blocks A41 and B42 are determined according to the size and shape of the thin-walled part 1 to ensure that they fully fit the outer contour of the thin-walled part 1 .

[0045] The clamping block is fixed to the thin-walled part 1 by a tightening belt 43 (steel belt or strapping belt), providing additional clamping force to ensure that the gap between the thin-walled part 1 and the rotating body 2 is controlled within a specified range.

[0046] like Figure 8 As shown, the axial locking structure 5 includes an upper cover 51 and a bottom plate 52 , which are respectively attached to the two end surfaces of the rotating body 2 .

[0047] The upper cover 51 and the bottom plate 52 are fixedly connected via a connecting shaft to form a stable axial locking system.

[0048] This structure is not only used to fix the rotary body 2, but also facilitates the installation of the thrust chamber assembly weldment on the electron beam equipment for subsequent welding operations.

[0049] The specific implementation steps of the thrust chamber assembly welding fixture are as follows:

[0050] 1. Assemble the internal support structure 3: Place the inner support plate 1 31, the inner support plate 2 32, the inner support plate 3 33 and the inner support plate 4 34 inside the rotating body 2 according to the design requirements; use the connecting screw 1 35, the connecting screw 2 36 and the connecting screw 3 37 to fix them together to form a stable internal support system.

[0051] 2. Install the external clamping device 4: Install the clamping block A41 and the clamping block B42 on the upper and lower middle parts of the thin-walled part 1 respectively, ensuring that they are completely in line with the outer contour of the thin-walled part 1; use a tightening belt 43 (steel belt or strapping belt) to fix the clamping blocks on the thin-walled part 1 to provide additional clamping force.

[0052] 3. Install the axial locking structure 5: fit the upper cover 51 and the bottom plate 52 onto the two end faces of the rotating body 2 respectively; use the connecting shaft to fix the upper cover 51 and the bottom plate 52 together to form a stable axial locking system. Example

[0053] Thrust chamber product assembly structure, Figure 1 This is the pre-assembly state. Rotating body 2 is the workpiece, and thin-walled component 1 is assembled on the outer wall of rotating body 2. Thin-walled component 1 is a segmented structure, consisting of two halves. The longitudinal weld at the joint is made using argon arc welding. Simultaneously, two radial electron beam welds are made on the outer wall of thin-walled component 1. These electron beam welds are lap joints, ensuring that the welds penetrate thin-walled component 1 and connect to rotating body 2.

[0054] The overall structure of the fixture is divided into three parts. The first part is the internal support structure, which controls the deformation of the rotating body 2 during the welding process; the second part is the external clamping and fixing device of the thin-walled part 1, which ensures that the assembly gap between the thin-walled part 1 and the rotating body 2 is ≤0.2-0.8mm, thereby ensuring the quality of the electron beam weld; the third part is the axial locking structure on both end faces of the rotating body 2, and the clamping and fixing structure with the electron beam positioner.

[0055] Internal support structure: The workpiece is equipped with four supporting ring plates (inner support plate 1, inner support plate 2, inner support plate 3, and inner support plate 4). The outer contours of the ring plates must perfectly match the inner contours of the workpiece. Each pair of ring plates is bolted together. Four 300-400mm bolts connect inner support plate 1 and inner support plate 3, four 240-340mm bolts connect inner support plate 2 and inner support plate 3, and four 450-550mm bolts connect inner support plate 2 and inner support plate 4. This prevents the inner support plates from moving axially, controlling welding deformation, ensuring workpiece roundness, and ensuring satisfactory weld quality.

[0056] External clamping device: 8 clamping blocks A are installed near the small end face of thin-walled part 1, and 8 clamping blocks B are installed near the large end face of thin-walled part 1. The inner contour of the clamping blocks is consistent with the outer contour of thin-walled part 1 to ensure a complete fit. The clamping blocks are axially positioned by the end face of thin-walled part 1, and are tightened and fixed with steel belts / strap tape on the outer wall of the clamping blocks to ensure uniform force throughout the entire circle. A total of 4 circles of steel belts / strap tape are distributed on both sides of clamping blocks A / B.

[0057] Marking a whole circle along the circumferential direction on the outer wall of the rotating body 2 and aligning the small end surface of the thin-walled part 1 with the marked line can meet the axial positioning height of the thin-walled part 1.

[0058] After determining the position, use argon arc spot welding to fix it to ensure that the gap of the whole circle is ≤0.2-0.8mm to meet the requirements of electron beam welding, and remove the clamping block and steel belt / packing belt.

[0059] Axial locking structure: There are two pressure covers (tooling cover and tooling bottom plate) on both end surfaces of the rotating body 2. The pressure covers are locked by an intermediate shaft. At the same time, four zero-point quick clamps are installed on the tooling cover to facilitate its connection and fixation with the electron beam equipment.

[0060] The thrust chamber assembly welding fixture realizes the lap weld of the rotating body of the thin-walled part, meets the small gap state in the assembly process, controls the deformation during the welding process, ensures the quality of the entire circle weld, and has good consistency in penetration depth.

[0061] This thrust chamber assembly fixture provides an internal support structure for controlling welding deformation and ensuring the roundness of the workpiece. The workpiece contains four supporting ring plates, whose outer contours must perfectly match the workpiece's inner contours. The ring plates are positioned axially in the workpiece using an intermediate step shaft. Each pair of ring plates is bolted together and secured to each other. A segmented assembly clamping structure is provided, where a thin-walled component 1 is assembled on the outer wall of the rotating body 2. The thin-walled component 1 is a segmented structure consisting of two halves. Eight clamping blocks are installed near the electron beam weld on the outer wall of the thin-walled component 1, tightened by steel bands. A high-voltage electron beam equipment fixture is provided, with two pressure caps on each end of the rotating body 2, locked together by an intermediate shaft and one end connected to the electron beam equipment. A thin-walled component 1 assembly positioning scheme is provided, where a machined line is engraved on the outer wall of the rotating body 2. Using this line as a reference, the small end face of the thin-walled component 1 is aligned to ensure assembly position.

Claims

1. A fixture for thrust chamber assembly welding parts, characterized in that: A thrust chamber assembly welded component, consisting of a thin-walled component (1) and a rotating body (2), wherein the rotating body (2) is a thin shell structure consisting of a straight cylinder section (21), a first conical cylinder section (22), a rounded transition section (23) and a second conical cylinder section (24), wherein the diameter of the first conical cylinder section (22) gradually decreases from top to bottom, and the diameter of the second conical cylinder section (24) gradually decreases from bottom to top, and the intersection of the first conical cylinder section (22) and the second conical cylinder section (24) is formed. The confluence is set as a rounded transition section (23), and the two halves of the thin-walled member (1) that fit the outer contour of the rotating body (2) are spliced ​​and welded to the rotating body (2), and the splicing is a longitudinal weld (12). The first cone section (22) and the second cone section (24) are also fixedly connected to the thin-walled member (1) through radial welds (11), and the radial welds (11) are welds that penetrate the thin-walled member (1) and are welded to the rotating body (2). The overlap structure; The fixture comprises an internal support structure (3), an external clamping device (4) and an axial locking structure (5), wherein the internal support structure (3) is arranged inside the rotating body (2) to prevent welding deformation, the external clamping device (4) is arranged outside the thin-walled part (1) to ensure a gap between the thin-walled part (1) and the rotating body (2), and the axial locking structure (5) is arranged on two end surfaces of the rotating body (2) to be installed on the electron beam device; The internal support structure (3) includes an inner support plate 1 (31), an inner support plate 2 (32), an inner support plate 3 (33) and an inner support plate 4 (34); the outer contours of the inner support plate 1 (31) and the inner support plate 2 (32) fit the inner contour of the first cone section (22); the outer contours of the inner support plate 3 (33) and the inner support plate 4 (34) fit the inner contour of the second cone section (24); the inner support plate 1 (31), the inner support plate 2 (32), the inner support plate 3 (33) and the inner support plate 4 (34) are fixedly connected by connecting screw 1 (35), connecting screw 2 (36) and connecting screw 3 (37), respectively; The external clamping and fixing device includes a clamping block A (41) and a clamping block B (42), and a plurality of clamping blocks A (41) and clamping blocks B (42) that fit the outer contour of the thin-walled part (1) are evenly installed at the upper middle part and the lower middle part of the thin-walled part (1), respectively. The clamping blocks A (41) and the clamping blocks B (42) are fixed to the thin-walled part (1) by tightening belts (43). The axial locking structure (5) comprises an upper cover (51) and a bottom plate (52), wherein the upper cover (51) and the bottom plate (52) are respectively attached to two end surfaces of the rotating body (2), and the upper cover (51) and the bottom plate (52) are fixedly connected via a connecting shaft.

2. A fixture for thrust chamber assembly welding according to claim 1, characterized in that: The tightening belt (43) is a steel belt or a packing belt.

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