Tool clamp for thrust chamber assembly welding piece

Abstract

The invention relates to the technical field of thrust chamber assembling and welding, in particular to a thrust chamber assembling and welding part tool clamp which comprises an internal supporting structure, an external clamping and fixing device and an axial locking structure. The external clamping and fixing device is arranged outside the thin-wall part and used for guaranteeing a gap between the thin-wall part and the rotary body, and the axial locking structures are arranged on the two end faces of the rotary body and used for being installed on electron beam equipment. The thrust chamber assembly welding piece tool clamp meets the strict requirement of electron beam welding for the workpiece assembly state, the workpiece assembly precision and operability are improved, welding deformation is controlled, and the electron beam welding line quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of thrust chamber assembly welding, and in particular to a thrust chamber assembly welding fixture. 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 component 1 is welded on the outer wall of the contour. The thin-walled component 1 is a segmented structure, which is formed by splicing two halves.

[0003] The longitudinal weld at the joint is welded with argon arc welding, and there are two radial electron beam welds on the outer wall of the thin-walled part 1. This electron beam weld is a lapped 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 at 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 circle; the electron gun of the electron beam equipment is a high-voltage fixed gun, which emits an electron beam vertically to the ground. The axis of the workpiece 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 thrust chamber assembly welds, it is necessary to design a tooling fixture to solve the above-mentioned technical difficulties. Summary of the invention

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

[0006] The technical solution of the present invention is as follows: A thrust chamber assembly welded component consists of a thin-walled component and a rotating body. The rotating body is a thin shell-like structure consisting of a straight cylinder section, a first cone cylinder section, a rounded transition section and a second cone cylinder section. The diameter of the first cone cylinder section gradually decreases from top to bottom, and the diameter of the second cone cylinder section gradually decreases from bottom to top. The intersection of the first cone cylinder section and the second cone cylinder section is set as a rounded transition section. The two halves are spliced ​​with thin-walled components that fit the outer contour of the rotating body and are welded and fixed on the rotating body. The splicing is a radial weld. The first cone cylinder section and the second cone cylinder section are also fixedly connected to the thin-walled component through radial welds respectively. The radial weld is a lap joint structure in which the weld penetrates the thin-walled component and is welded to the rotating body.

[0007] 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 two end surfaces of the rotating body for installation on an electron beam device.

[0008] 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 matched with the inner contour of the first cone cylinder section, and the outer contours of inner support plate 3 and inner support plate 4 are matched with the inner contour of the second cone cylinder 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.

[0009] The external clamping and fixing device includes a clamping block A and a clamping block B. A plurality of clamping blocks A and a clamping block 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 B are fixed to the thin-walled part by tightening belts respectively.

[0010] The tightening belt is a steel belt or a packing belt.

[0011] The axial locking structure comprises an upper cover and a bottom plate, the upper cover and the bottom plate are respectively attached to two end surfaces of the rotating body, and the upper cover and the bottom plate are fixedly connected via a connecting shaft.

[0012] The beneficial effects of the present invention are: 1. The present invention discloses a tooling fixture for thrust chamber assembly welding parts. The setting of the internal supporting structure of the tooling fixture for thrust chamber assembly welding parts effectively prevents the deformation of the rotating body during welding, and ensures 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, and at the same time ensures 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 vertically to the ground, and achieving the goal of welding radial circumferential welds.

[0013] 2. The present invention discloses a thrust chamber assembly welding fixture, which ensures the stability and reliability of the internal support structure by fitting the 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 by fixedly connecting the connecting screw 1, connecting screw 2 and connecting screw 3.

[0014] 3. The present invention discloses a thrust chamber assembly welding fixture, in which the clamping blocks A and B of the thrust chamber assembly welding fixture fit the outer contour of the thin-walled part, and the use of a tightening belt achieves effective clamping and fixation of the thin-walled part, ensuring the accuracy of the assembly gap and assembly position.

[0015] 4. The present invention discloses a thrust chamber assembly welding fixture, wherein the tightening belt of the thrust chamber assembly welding fixture is a steel belt or a packing belt, which has sufficient strength and rigidity and can meet the requirements of clamping and fixing.

[0016] 5. The present invention discloses a thrust chamber assembly welding fixture. The upper cover and the bottom plate of the thrust chamber assembly welding fixture are fitted with the end surface of the rotating body, and the connecting shaft is fixedly connected, so as to realize the axial locking and fixation of the thrust chamber assembly welding parts, and ensure the stability and reliability of the workpiece during the welding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] By reading the detailed description of the preferred embodiment below, the scheme and advantages of the present application will become clear to those skilled in the art. The accompanying drawings are only for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present invention.

[0018] In the attached picture: Figure 1 It 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; Figure 2 It 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; Figure 3 It is a schematic diagram of the appearance structure of a thrust chamber assembly weldment and a fixture after being assembled according to an embodiment of the present invention; Figure 4 It is a schematic cross-sectional structure diagram of a thrust chamber assembly weldment and a fixture after being assembled according to an embodiment of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the internal support structure of a tooling fixture for a thrust chamber assembly weldment according to an embodiment of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of an external clamping and fixing device of a thrust chamber assembly welding fixture according to an embodiment of the present invention; Figure 7 for Figure 6 A partial enlarged cross-sectional view; Figure 8 It is a schematic diagram of the three-dimensional appearance structure of an axial locking structure of a tooling fixture of a thrust chamber assembly weldment according to an embodiment of the present invention; The components represented by the reference numerals in the figure are: The present invention: 1. thin-walled parts, 11. radial welds, 12. longitudinal welds, 2. rotating body, 21. straight cylinder section, 22. first cone cylinder section, 23. rounded transition section, 24. second cone 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

[0019] like Figure 1 and Figure 2 As shown, the thrust chamber assembly weldment is mainly composed of a thin-walled part 1 and a rotating body 2.

[0020] The rotating body 2 is a thin shell structure, which is specifically formed by sequentially connecting a straight cylinder section 21, a first cone cylinder section 22, a rounded transition section 23 and a second cone cylinder section 24.

[0021] The straight section 21 has a constant diameter and serves as the base of the rotating body.

[0022] The diameter of the first conical cylinder section 22 gradually decreases from top to bottom, forming a conical structure.

[0023] The rounded transition section 23 connects the first cone section 22 and the second cone section 24 to ensure smooth transition and reduce stress concentration.

[0024] The diameter of the second conical cylinder section 24 gradually decreases from bottom to top.

[0025] 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 radial weld 11. The first cone section 22 and the second cone 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.

[0026] 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.

[0027] 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 .

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] The number and positions of the clamping blocks A41 and B42 are determined according to the size and shape of the thin-walled component 1 to ensure that they are completely fitted with the outer contour of the thin-walled component 1 .

[0033] The clamping block is fixed to the thin-walled component 1 by a tightening belt 43 (steel belt or strapping belt), providing additional clamping force to ensure that the gap between the thin-walled component 1 and the rotating body 2 is controlled within a specified range.

[0034] 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 .

[0035] The upper cover 51 and the bottom plate 52 are fixedly connected via a connecting shaft to form a stable axial locking system.

[0036] This structure is not only used to fix the rotating body 2, but also facilitates the installation of the thrust chamber assembly weldment on the electron beam equipment for subsequent welding operations.

[0037] The specific implementation steps of the thrust chamber assembly fixture are as follows: 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.

[0038] 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 packing belt) to fix the clamping block on the thin-walled part 1 to provide additional clamping force.

[0039] 3. Install the axial locking structure 5: fit the upper cover 51 and the bottom plate 52 onto the two end surfaces of the rotating body 2 respectively; use a connecting shaft to fix the upper cover 51 and the bottom plate 52 together to form a stable axial locking system. Example

[0040] Thrust chamber product assembly structure, Figure 1 This is the state before assembly. The rotating body 2 is a rotating body workpiece. The thin-walled part 1 is assembled on the outer wall of the rotating body 2. The thin-walled part 1 is a segmented structure, which is formed by splicing two halves. The longitudinal weld at the splicing point is welded by argon arc welding. 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 joint structure. It is necessary to ensure that the weld penetrates the thin-walled part 1 and is welded to the rotating body 2.

[0041] The overall structure of the tooling 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 surfaces of the rotating body 2, and the clamping and fixing structure with the electron beam positioner.

[0042] Internal support structure: There are 4 supporting ring plates inside the workpiece (inner support plate 1, inner support plate 2, inner support plate 3, inner support plate 4), and the outer contour of the ring plate must fit the inner contour of the workpiece completely; every two ring plates are tightened with bolts, 4 bolts with a length of 300-400mm are connected between inner support plate 1 and inner support plate 3, 4 bolts with a length of 240-340mm are connected between inner support plate 2 and inner support plate 3, and 4 bolts with a length of 450-550mm are connected between inner support plate 2 and inner support plate 4. Ensure that the inner support plate does not move in the axial direction, control welding deformation, ensure the roundness of the workpiece, and meet the quality of the weld.

[0043] External clamping and fixing 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 block is consistent with the outer wall contour of thin-walled part 1 to ensure complete fit. The clamping block is axially positioned by the end face of thin-walled part 1, and is tightened and fixed with steel belt / strap tape on the outer wall of the clamping block to ensure uniform force throughout the circle. There are 4 circles of steel belt / strap tape, distributed on both sides of clamping block A / clamping block B.

[0044] A full circle of engraved lines is drawn along the circumferential direction on the outer wall of the rotating body 2 , and the small end surface of the thin-walled component 1 is aligned with the engraved lines, so that the axial positioning height of the thin-walled component 1 can be met.

[0045] 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.

[0046] Axial locking structure: There are two pressure covers (tooling upper cover and tooling bottom plate) on the two end surfaces of the rotating body 2. The pressure covers are locked by an intermediate shaft. At the same time, 4 zero-point quick clamps are installed on the tooling upper cover to facilitate its connection and fixation with the electron beam equipment.

[0047] 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 in the welding process, ensures the quality of the entire circle weld, and has good consistency in penetration depth.

[0048] The thrust chamber assembly welding fixture provides an internal support structure for controlling welding deformation and ensuring the roundness of the workpiece. There are a total of 4 supporting ring plates inside the workpiece. The outer contour of the ring plate must be completely fitted with the inner contour of the workpiece. The ring plate is positioned in the axial direction of the workpiece by relying on the intermediate step shaft. At the same time, each two ring plates are tightened with bolts to fix each other; a segmented assembly clamping and fixing structure is provided, and a thin-walled part 1 is assembled on the outer wall of the rotating body 2, wherein the thin-walled part 1 is a segmented structure, which is spliced ​​in two halves; 8 clamping blocks are respectively installed near the electron beam weld on the outer wall of the thin-walled part 1, and the clamping blocks are tightened by steel belts; a high-voltage electron beam equipment clamping fixture is provided, and there are two pressure caps on the two end faces of the rotating body 2, which are locked by the intermediate shaft, and one end is connected to the electron beam equipment; a thin-walled part 1 assembly positioning scheme is provided, and a cut line is machined on the circumference of the outer wall of the rotating body 2. With this cut line as a reference, the small end face of the thin-walled part 1 is aligned to meet the assembly position.

Claims

1. A thrust chamber assembly weldment, characterized in that: The invention comprises a thin-walled member (1) and a rotating body (2); the rotating body (2) is a thin shell-like structure composed of a straight cylinder section (21), a first cone cylinder section (22), a rounded transition section (23) and a second cone cylinder section (24); the diameter of the first cone cylinder section (22) gradually decreases from top to bottom, and the diameter of the second cone cylinder section (24) gradually decreases from bottom to top; the intersection of the first cone cylinder section (22) and the second cone cylinder section (24) is set as a rounded transition section (23); 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); the splicing point is a radial weld (11); the first cone cylinder section (22) and the second cone cylinder section (24) are also respectively fixedly connected to the thin-walled member (1) through radial welds (11); the radial welds (11) are overlapped structures in which the welds penetrate the thin-walled member (1) and are welded to the rotating body (2).

2. A thrust chamber assembly welding fixture for a thrust chamber assembly welding component according to claim 1, characterized in that: The invention comprises an internal support structure (3), an external clamping and fixing device (4) and an axial locking structure (5); the internal support structure (3) is arranged inside the rotating body (2) to prevent welding deformation; the external clamping and fixing device (4) is arranged outside the thin-walled part (1) to ensure the 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 an electron beam device.

3. A thrust chamber assembly welding fixture as claimed in claim 2, characterized in that: The internal support structure (3) comprises 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 with the inner contour of the first cone cylinder section (22); the outer contours of the inner support plate 3 (33) and the inner support plate 4 (34) fit with the inner contour of the second cone cylinder 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 rod 1 (35), connecting screw rod 2 (36) and connecting screw rod 3 (37), respectively.

4. A thrust chamber assembly welding fixture as claimed in claim 2, characterized in that: The external clamping and fixing device comprises a clamping block A (41) and a clamping block B (42). A plurality of clamping blocks A (41) and clamping blocks B (42) that fit the outer contour of the thin-walled member (1) are evenly installed at the upper middle portion and the lower middle portion of the thin-walled member (1), respectively. The clamping blocks A (41) and clamping blocks B (42) are fixed to the thin-walled member (1) by tightening bands (43).

5. A thrust chamber assembly welding fixture as claimed in claim 4, characterized in that: The tightening belt (43) is a steel belt or a packing belt.

6. A thrust chamber assembly welding fixture as claimed in claim 2, characterized in that: The axial locking structure (5) comprises an upper cover (51) and a bottom plate (52); 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.

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