CN115609222A - A method and system for accurately repairing a high-strength thick-walled conduit of a liquid rocket engine - Google Patents
A method and system for accurately repairing a high-strength thick-walled conduit of a liquid rocket engine Download PDFInfo
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Abstract
一种液体火箭发动机高强度厚壁导管精确修配方法，包括：1)在导管两端连接部位安装调整垫片，控制连接部位间隙，保证间隙均匀，满足后续装配需求；2)安装并调整测量转化装置，将空间尺寸转化为平面尺寸；3)在导管两端连接部位安装球面螺栓，使连接法兰中心线对齐；4)通过角磨机和锉刀精修各段端口对接面，保证零件对接面间隙均匀，焊接变形可控；5)进行锁底焊，通过在发动机上进行焊接，控制导管成型前的锁底焊缝连接端错壁量和对接间隙满足要求，待焊缝完全冷却后拆卸，确保导管顺利合拢；6)按上述步骤生产液体火箭发动机高强度厚壁导管，完成液体火箭发动机高强度厚壁导管精确修配。本发明能够导管生产难并加工效率低的问题。
A method for accurately repairing a high-strength thick-walled conduit of a liquid rocket engine, comprising: 1) installing adjustment gaskets at the joints at both ends of the conduit to control the gap between the joints to ensure uniform gaps and meet subsequent assembly requirements; 2) installing and adjusting the measurement conversion 3) Install spherical bolts at the connecting parts at both ends of the conduit to align the centerlines of the connecting flanges; 4) Finish the butt joints of each section of the port with an angle grinder and a file to ensure the joints of the parts The gap is uniform and the welding deformation is controllable; 5) Bottom lock welding is carried out. By welding on the engine, the amount of wall deviation at the connection end of the bottom lock weld before the conduit is formed and the butt joint gap meet the requirements. After the weld is completely cooled, it is disassembled. Ensure the smooth closing of the conduit; 6) Produce the high-strength thick-walled conduit for the liquid rocket engine according to the above steps, and complete the precise repair of the high-strength thick-walled conduit for the liquid rocket engine. The invention solves the problems of difficult catheter production and low processing efficiency.
Description
技术领域technical field
本发明涉及一种液体火箭发动机高强度厚壁导管的精确修配方法及系统，属于复杂空间走向特殊管材生产装配技术领域。The invention relates to a precise repair method and system for a high-strength thick-walled conduit of a liquid rocket engine, and belongs to the technical field of production and assembly of special pipes in complex spaces.
背景技术Background technique
液体火箭发动机氧化剂泵出口导管、燃料泵出口导管连接泵和相关阀门，为发动机燃烧室提供高压氧化剂和燃料，工作压力高达37.5MPa，是发动机关键部件，如图1所示。该种导管材料为高强钢S-03、S-06，壁厚达5～8mm，整根导管由多个零件组焊而成，焊缝数量≥5条，加工难度大。其原始加工方法生产工作量占单台发动机总装工作量的20％左右。该导管生产难并加工效率低。The outlet conduit of the oxidant pump of the liquid rocket engine and the outlet conduit of the fuel pump are connected to the pump and related valves to provide high-pressure oxidant and fuel for the engine combustion chamber, and the working pressure is as high as 37.5MPa. The catheter material is high-strength steel S-03 and S-06, with a wall thickness of 5-8mm. The whole catheter is assembled and welded by multiple parts, and the number of welds is ≥ 5, which is difficult to process. The production workload of its original processing method accounts for about 20% of the total assembly workload of a single engine. Such catheters are difficult to produce and process inefficiently.
发明的内容content of the invention
本发明要解决的技术问题是：克服现有技术的不足，提出一种液体火箭发动机高强度厚壁导管的精确修配方法及系统，解决该导管生产的难点并提高加工效率，保证发动机质量，为液体火箭发动机生产效率提升、生产节拍论证以及生产模式的提升提供借鉴The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, to propose a method and system for accurately repairing high-strength thick-walled ducts of liquid rocket engines, to solve the difficulties in the production of the ducts and to improve the processing efficiency, to ensure the quality of the engine, and to provide Improvement of liquid rocket engine production efficiency, demonstration of production cycle and improvement of production mode provide reference
本发明采用的技术方案为：The technical scheme adopted in the present invention is:
一种液体火箭发动机高强度厚壁导管精确修配方法，包括：A method for accurately repairing high-strength thick-walled ducts of liquid rocket engines, including:
(1)在导管两端连接部位安装调整垫片，控制连接部位间隙，保证间隙均匀，满足后续装配需求；(1) Install adjusting gaskets at the connecting parts at both ends of the conduit to control the gap between the connecting parts to ensure uniform gaps and meet subsequent assembly requirements;
(2)安装并调整测量转化装置，将空间尺寸转化为平面尺寸；(2) Install and adjust the measurement conversion device to convert the space size into a plane size;
(3)在导管两端连接部位安装球面螺栓，使连接法兰中心线对齐；(3) Install spherical bolts at the joints at both ends of the conduit to align the centerlines of the connecting flanges;
(4)通过角磨机和锉刀精修各段端口对接面，保证零件对接面间隙均匀，焊接变形可控；(4) Use angle grinder and file to refine the butt joint surface of each section of the port to ensure that the gap between the butt joint surfaces of the parts is uniform and the welding deformation is controllable;
(5)进行锁底焊，通过在发动机上进行焊接，控制导管成型前的锁底焊缝连接端错壁量和对接间隙满足要求，待焊缝完全冷却后拆卸，确保导管顺利合拢；(5) Carry out bottom lock welding. By welding on the engine, control the amount of wall offset and the butt joint gap of the bottom lock weld joint before the conduit is formed to meet the requirements. After the weld is completely cooled, disassemble it to ensure the smooth closure of the conduit;
(6)按上述步骤生产液体火箭发动机高强度厚壁导管，完成液体火箭发动机高强度厚壁导管精确修配。(6) Produce the high-strength thick-walled duct of the liquid rocket engine according to the above steps, and complete the precise repair of the high-strength thick-walled duct of the liquid rocket engine.
进一步的，所述导管壁厚为5～8mm，包括法兰、弯管、直管以及锁底环，焊缝数量≥5条，接口法线异面且不平行。Further, the wall thickness of the conduit is 5-8 mm, including flanges, bent pipes, straight pipes and bottom lock rings, the number of welds is more than 5, and the normal lines of the interfaces are different planes and not parallel.
进一步的，所述测量转化装置，将空间尺寸转化为平面尺寸，具体包括：Further, the measurement conversion device converts spatial dimensions into plane dimensions, specifically including:
左右撑、中轴和独立撑；Left and right support, central axis and independent support;
左右撑与中轴配套使用，用于替代较长直管，与两端零件进行连接；The left and right supports are used in conjunction with the central shaft to replace the longer straight pipe and connect with the parts at both ends;
独立撑用于替代较短直管，与两端零件进行连接；The independent support is used to replace the shorter straight pipe and connect with the parts at both ends;
将左右撑和独立撑通过法兰与弯管进行连接，形成一个整体，通过测量独立撑尺寸和左右撑间距即可得出各段直管长度尺寸。The left and right braces and the independent braces are connected to the elbow through flanges to form a whole, and the length of each section of the straight pipe can be obtained by measuring the size of the independent braces and the distance between the left and right braces.
进一步的，在导管两端连接部位安装球面螺栓，使连接法兰中心线对齐，通过测量法兰间隙，控制法兰偏斜，包括：Further, spherical bolts are installed at the joints at both ends of the conduit to align the centerlines of the connecting flanges, and the deflection of the flanges is controlled by measuring the gap between the flanges, including:
(3.1)安装法兰，由于连接面为球面，导致法兰间存在偏斜和中心线错位；(3.1) When installing flanges, since the connecting surface is a spherical surface, there is a deflection and center line misalignment between the flanges;
(3.2)安装球面螺栓，锥形连接形式通过法兰安装孔可将法兰中心线对正；(3.2) Install spherical bolts, the conical connection form can align the center line of the flange through the flange mounting hole;
(3.3)通过调整法兰四周间隙控制法兰偏斜。(3.3) Control the deflection of the flange by adjusting the gap around the flange.
进一步的，精修后端面平面度≯0.1mm，坡口均匀，角度偏差≤±2°，连接部位错壁≯1mm。Further, after finishing, the flatness of the end surface is ≯0.1mm, the bevel is uniform, the angle deviation is ≤±2°, and the wrong wall of the connection part is ≯1mm.
进一步的，所述通过角磨机和锉刀精修各段端口对接面，具体包括如下步骤：Further, the refinement of the butt joint surfaces of each segment of the port with an angle grinder and a file specifically includes the following steps:
(4.1)通过角磨机快速去除端口对接面余量；(4.1) Quickly remove the port butt joint surface allowance by an angle grinder;
(4.2)使用锉刀精确去除对接面余量；(4.2) Use a file to accurately remove the margin of the butt joint;
(4.3)使用锉刀平整端面，去除毛刺和飞边。(4.3) Use a file to smooth the end face and remove burrs and flash.
进一步的，所述进行锁底焊，具体包括如下步骤：Further, the bottom lock welding described specifically includes the following steps:
(5.1)锁底焊缝通过手工精修控制连接部位错壁≯1mm，并预留2～3mm对接间隙，确保导管顺利合拢、减少焊接缺陷；(5.1) The bottom-lock weld is controlled by manual finishing to control the staggered wall ≯ 1mm, and a 2-3mm butt joint gap is reserved to ensure the smooth closure of the conduit and reduce welding defects;
(5.2)进行氩弧焊接；(5.2) Carry out argon arc welding;
(5.3)待焊缝完全冷却后拆卸，保证导管整体焊接变形量控制在±1mm以内，装配应力在可控范围内。(5.3) Disassemble after the weld seam is completely cooled to ensure that the overall welding deformation of the conduit is controlled within ±1mm and the assembly stress is within a controllable range.
进一步的，本发明还提出一种液体火箭发动机高强度厚壁导管精确修配系统，包括：Furthermore, the present invention also proposes a precision repair system for high-strength thick-walled conduits of liquid rocket engines, including:
连接部位间隙调整模块：在导管两端连接部位安装调整垫片，控制连接部位间隙，保证间隙均匀，满足后续装配需求；Joint gap adjustment module: Install adjusting gaskets at the joints at both ends of the conduit to control the gap between the joints to ensure uniform gaps and meet subsequent assembly requirements;
空间尺寸转化模块：安装并调整测量转化装置，将空间尺寸转化为平面尺寸；Space size conversion module: install and adjust the measurement conversion device to convert the space size into a plane size;
连接法兰中心线对齐模块：在导管两端连接部位安装球面螺栓，使连接法兰中心线对齐；Connecting flange centerline alignment module: Install spherical bolts at the connecting parts at both ends of the conduit to align the connecting flange centerlines;
精修模块：通过角磨机和锉刀精修各段端口对接面，保证零件对接面间隙均匀，焊接变形可控；Finishing module: use angle grinder and file to refine the butt joint surface of each section to ensure that the gap between the butt joint surfaces of parts is even and the welding deformation is controllable;
锁底焊模块：进行锁底焊，通过在发动机上进行焊接，控制导管成型前的锁底焊缝连接端错壁量和对接间隙满足要求，待焊缝完全冷却后拆卸，确保导管顺利合拢；完成液体火箭发动机高强度厚壁导管精确修配。Bottom-lock welding module: perform bottom-lock welding. By welding on the engine, control the wall offset and butt joint gap of the bottom-lock weld before the conduit is formed to meet the requirements. After the weld is completely cooled, disassemble it to ensure the smooth closure of the conduit; Accurate repair of high-strength thick-walled ducts for liquid rocket engines has been completed.
本发明与现有技术相比的有益效果是：The beneficial effect of the present invention compared with prior art is:
(1)质量提升：导管变形受控，整根导管变形量≤1mm，装配间隙均匀、整体装配应力小，装配后气密一次合格，用此方法生产的80余台发动机均试车成功并交付飞行使用；(1) Quality improvement: the deformation of the conduit is controlled, the deformation of the entire conduit is ≤1mm, the assembly gap is uniform, the overall assembly stress is small, and the airtightness is qualified once after assembly. More than 80 engines produced by this method have been successfully tested and delivered for flight use;
(2)效率提升：导管端口大部分余量可提前通过机械加工去除，人工去除工作量减少80％～90％，焊缝焊接缺陷少，整根导管生产时间由10天缩短至3天，效率提升3倍以上；(2) Efficiency improvement: Most of the margin of the catheter port can be removed by machining in advance, the manual removal workload is reduced by 80% to 90%, the welding seam has fewer welding defects, and the production time of the whole catheter is shortened from 10 days to 3 days, improving the efficiency. Increased by more than 3 times;
(3)效益提升：人力成本由3～4人协同操作减少为1人独立完成，结合降低废品率、缩短生产周期等效果，综合达到了效益提升的目的。(3) Efficiency improvement: The labor cost is reduced from 3 to 4 people for collaborative operation to 1 person for independent completion. Combined with the effects of reducing the scrap rate and shortening the production cycle, the purpose of benefit improvement is comprehensively achieved.
(4)按本发明方法生产液体火箭发动机高强度厚壁导管整体焊接变形量控制在±1mm以内，装配应力小，相连组件内泄漏装配前后无变化，最终满足整根导管的空间装配需求。(4) The overall welding deformation of the high-strength thick-walled conduit for the liquid rocket engine produced by the method of the present invention is controlled within ±1 mm, the assembly stress is small, and the internal leakage of the connected components remains unchanged before and after assembly, finally meeting the space assembly requirements of the entire conduit.
附图说明Description of drawings
图1为液体火箭发动机氧化剂泵出口导管、燃料泵出口导管连接泵示意图；Fig. 1 is a schematic diagram of a liquid rocket engine oxidant pump outlet conduit and a fuel pump outlet conduit connecting the pump;
图2是测量转化装置示意图。Fig. 2 is a schematic diagram of the measurement conversion device.
具体实施方式detailed description
下面结合附图和具体实施例对本发明作进一步详细的描述：Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:
本发明通过制作测量转化装置将空间尺寸转化为平面尺寸，降低测量难度；通过制作自带定位的球面导向螺栓保证测量的准确性和一致性；通过制作调整垫片以及焊接收缩量的统计形成焊接收缩量精确控制法，将各段修配后长度确定；通过角磨机+锉刀手工精修各段端口对接面；通过将导管成型前的锁底焊缝安排在发动机上焊接控制连接部位错壁和对接间隙满足要求，确保导管顺利合拢，最终满足整根导管的空间装配需求。The invention converts the space size into a plane size by making a measurement conversion device, and reduces the difficulty of measurement; by making a spherical guide bolt with its own positioning, the accuracy and consistency of the measurement are ensured; by making adjustment gaskets and statistics of welding shrinkage to form welding Precise shrinkage control method, determine the length of each segment after repair; use angle grinder + file to manually refine the butt joint surface of each segment port; arrange the bottom-locked weld seam before the conduit is formed on the engine to weld and control the joint part. The butt joint gap meets the requirements to ensure the smooth closure of the conduit and finally meet the space assembly requirements of the entire conduit.
导管特点：Catheter Features:
(1)材料为高强钢S-03、S-06；(1) The material is high-strength steel S-03, S-06;
(2)大壁厚(壁厚达5～8mm)；(2) Large wall thickness (wall thickness up to 5-8mm);
(3)焊缝数量多(焊缝数量≥5条)(3) The number of welds is large (number of welds ≥ 5)
本发明特点：Features of the present invention:
1、将空间尺寸转化为平面尺寸的装置：用于将空间尺寸转化为平面尺寸的装置，模拟调整各直管段、弯管段尺寸，将空间结构简化，仅需测量直管段长度，即可确定各段的相应尺寸。1. The device for converting the space size into the plane size: the device for converting the space size into the plane size, simulates and adjusts the size of each straight pipe section and curved pipe section, simplifies the space structure, and only needs to measure the length of the straight pipe section to determine The corresponding dimensions of each segment.
2、自带定位的球面导向螺栓，法兰对接过程中，使两法兰中心线自动对齐，保证后续测量的准确性和一致性，既准确又安全。2. The spherical guide bolts with self-positioning can automatically align the centerlines of the two flanges during the flange butt joint process to ensure the accuracy and consistency of subsequent measurements, which is both accurate and safe.
3、焊接收缩量精确控制法：通过制作调整垫片，控制法兰对接间隙，以及通过焊接收缩量的统计形成导管各段焊接收缩量精确控制法，可将各段修配后长度确定，达到焊接收缩量可控。3. Precise control method of welding shrinkage: by making adjustment gaskets, controlling flange butt joint gap, and forming precise control method of welding shrinkage of each section of conduit through statistics of welding shrinkage, the length of each section after repair can be determined to achieve welding The amount of shrinkage is controllable.
4、角磨机+锉刀手工精修法：通过角磨机+锉刀手工精修各段端口对接面，精修后端面平面度≯0.1mm，坡口均匀，角度偏差≤±2°，连接部位错壁≯1mm，保证零件对接面间隙均匀，焊接变形可控。4. Angle grinder + file manual finishing method: use angle grinder + file to manually finish the docking surface of each section of the port, after finishing, the flatness of the end surface is ≯0.1mm, the groove is uniform, the angle deviation is ≤±2°, and the connection parts are staggered The wall≯1mm ensures that the gap between the butt surfaces of the parts is even and the welding deformation is controllable.
5、锁底焊流程及相应控制要求：通过将导管成型前的锁底焊缝安排在发动机上焊接控制连接部位错壁和对接间隙满足要求，待焊缝完全冷却后拆卸，保证导管整体焊接变形量控制在±1mm以内，装配应力小，相连组件内泄漏装配前后无变化，确保导管顺利合拢，最终满足整根导管的空间装配需求。5. Bottom-locking welding process and corresponding control requirements: Arrange the bottom-locking weld seam before the conduit is formed on the engine to weld and control the connection part to meet the staggered wall and the butt gap to meet the requirements, and disassemble it after the weld seam is completely cooled to ensure the overall welding deformation of the conduit The amount is controlled within ±1mm, the assembly stress is small, and the internal leakage of the connected components does not change before and after assembly, ensuring the smooth closing of the conduit and finally meeting the space assembly requirements of the entire conduit.
具体的，本发明提供一种液体火箭发动机高强度厚壁导管精确修配方法，降低导管生产的难度并提高加工效率，保证发动机质量，为液体火箭发动机生产效率提升、生产节拍论证以及生产模式的提升提供借鉴。Specifically, the present invention provides a precise repair method for high-strength thick-walled conduits of liquid rocket engines, which reduces the difficulty of conduit production and improves processing efficiency, ensures the quality of the engine, and improves the production efficiency, production cycle demonstration and production mode of liquid rocket engines. Provide reference.
此方法具体实现过程如下：The specific implementation process of this method is as follows:
(1)在导管两端连接部位安装调整垫片，控制连接部位间隙，保证间隙均匀，满足后续装配需求；(1) Install adjusting gaskets at the connecting parts at both ends of the conduit to control the gap between the connecting parts to ensure uniform gaps and meet subsequent assembly requirements;
所述导管壁厚为5～8mm，包括法兰、弯管、直管以及锁底环，焊缝数量≥5条，接口法线异面且不平行。The wall thickness of the conduit is 5-8 mm, including flanges, bent pipes, straight pipes and bottom lock rings, the number of welds is ≥ 5, and the normal lines of the interfaces are different planes and not parallel.
(2)安装并调整测量转化装置，将空间尺寸转化为平面尺寸；(2) Install and adjust the measurement conversion device to convert the space size into a plane size;
如图2所示，所述测量转化装置，将空间尺寸转化为平面尺寸，具体包括：As shown in Figure 2, the measurement conversion device converts the spatial size into a plane size, specifically including:
左右撑、中轴和独立撑；Left and right support, central axis and independent support;
左右撑与中轴配套使用，用于替代较长直管，与两端零件进行连接；The left and right supports are used in conjunction with the central shaft to replace the longer straight pipe and connect with the parts at both ends;
独立撑用于替代较短直管，与两端零件进行连接；The independent support is used to replace the shorter straight pipe and connect with the parts at both ends;
将左右撑和独立撑通过法兰与弯管进行连接，形成一个整体，通过测量独立撑尺寸和左右撑间距即可得出各段直管长度尺寸。The left and right braces and the independent braces are connected to the elbow through flanges to form a whole, and the length of each section of the straight pipe can be obtained by measuring the size of the independent braces and the distance between the left and right braces.
(3)在导管两端连接部位安装球面螺栓，使连接法兰中心线对齐；通过测量法兰间隙，控制法兰偏斜，包括：(3) Install spherical bolts at the joints at both ends of the conduit to align the centerlines of the connecting flanges; by measuring the gap between the flanges, the deflection of the flanges is controlled, including:
(3.1)安装法兰，由于连接面为球面，导致法兰间存在偏斜和中心线错位；(3.1) When installing flanges, since the connecting surface is a spherical surface, there is a deflection and center line misalignment between the flanges;
(3.2)安装球面螺栓，锥形连接形式通过法兰安装孔可将法兰中心线对正；(3.2) Install spherical bolts, the conical connection form can align the center line of the flange through the flange mounting hole;
(3.3)通过调整法兰四周间隙控制法兰偏斜。(3.3) Control the deflection of the flange by adjusting the gap around the flange.
(4)通过角磨机和锉刀精修各段端口对接面，保证零件对接面间隙均匀，焊接变形可控；(4) Use angle grinder and file to refine the butt joint surface of each section of the port to ensure that the gap between the butt joint surfaces of the parts is uniform and the welding deformation is controllable;
(4.1)通过角磨机快速去除端口对接面余量；(4.1) Quickly remove the port butt joint surface allowance by an angle grinder;
(4.2)使用锉刀精确去除对接面余量；(4.2) Use a file to accurately remove the margin of the butt joint;
(4.3)使用锉刀平整端面，去除毛刺和飞边。(4.3) Use a file to smooth the end face and remove burrs and flash.
精修后端面平面度≯0.1mm，坡口均匀，角度偏差≤±2°，连接部位错壁≯1mm。After finishing, the flatness of the end surface is ≯0.1mm, the bevel is uniform, the angle deviation is ≤±2°, and the wrong wall of the connection part is ≯1mm.
(5)进行锁底焊，通过在发动机上进行焊接，控制导管成型前的锁底焊缝连接端错壁量和对接间隙满足要求，待焊缝完全冷却后拆卸，确保导管顺利合拢；(5) Carry out bottom lock welding. By welding on the engine, control the amount of wall offset and the butt joint gap of the bottom lock weld joint before the conduit is formed to meet the requirements. After the weld is completely cooled, disassemble it to ensure the smooth closure of the conduit;
(5.1)锁底焊缝通过手工精修控制连接部位错壁≯1mm，并预留2～3mm对接间隙，确保导管顺利合拢、减少焊接缺陷；(5.1) The bottom-lock weld is controlled by manual finishing to control the staggered wall ≯ 1mm, and a 2-3mm butt joint gap is reserved to ensure the smooth closure of the conduit and reduce welding defects;
(5.2)进行氩弧焊接；(5.2) Carry out argon arc welding;
(5.3)待焊缝完全冷却后拆卸，保证导管整体焊接变形量控制在±1mm以内，装配应力在可控范围内。(5.3) Disassemble after the weld seam is completely cooled to ensure that the overall welding deformation of the conduit is controlled within ±1mm and the assembly stress is within a controllable range.
(6)按上述步骤生产液体火箭发动机高强度厚壁导管，完成液体火箭发动机高强度厚壁导管精确修配。(6) Produce the high-strength thick-walled duct of the liquid rocket engine according to the above steps, and complete the precise repair of the high-strength thick-walled duct of the liquid rocket engine.
进一步的，本发明还提出一种液体火箭发动机高强度厚壁导管精确修配系统，包括：Furthermore, the present invention also proposes a precision repair system for high-strength thick-walled conduits of liquid rocket engines, including:
连接部位间隙调整模块：在导管两端连接部位安装调整垫片，控制连接部位间隙，保证间隙均匀，满足后续装配需求；Joint gap adjustment module: Install adjusting gaskets at the joints at both ends of the conduit to control the gap between the joints to ensure uniform gaps and meet subsequent assembly requirements;
空间尺寸转化模块：安装并调整测量转化装置，将空间尺寸转化为平面尺寸；Space size conversion module: install and adjust the measurement conversion device to convert the space size into a plane size;
连接法兰中心线对齐模块：在导管两端连接部位安装球面螺栓，使连接法兰中心线对齐；Connecting flange centerline alignment module: Install spherical bolts at the connecting parts at both ends of the conduit to align the connecting flange centerlines;
精修模块：通过角磨机和锉刀精修各段端口对接面，保证零件对接面间隙均匀，焊接变形可控；Finishing module: use angle grinder and file to refine the butt joint surface of each section to ensure that the gap between the butt joint surfaces of parts is even and the welding deformation is controllable;
锁底焊模块：进行锁底焊，通过在发动机上进行焊接，控制导管成型前的锁底焊缝连接端错壁量和对接间隙满足要求，待焊缝完全冷却后拆卸，确保导管顺利合拢；完成液体火箭发动机高强度厚壁导管精确修配。Bottom-lock welding module: perform bottom-lock welding. By welding on the engine, control the wall offset and butt joint gap of the bottom-lock weld before the conduit is formed to meet the requirements. After the weld is completely cooled, disassemble it to ensure the smooth closure of the conduit; Accurate repair of high-strength thick-walled ducts for liquid rocket engines has been completed.
本发明通过制作测量转化装置将空间尺寸测量转化为平面尺寸测量，降低测量难度；通过制作自定位球面导向螺栓使接口法兰连接中心自动找正，保证测量的准确性和一致性；通过制作调整垫片以及焊接收缩量的统计形成焊接收缩量精确控制法，可将各段修配后长度确定，达到焊接收缩量可控；通过角磨机+锉刀手工精修各段端口对接面，精修后端面平面度≯0.1mm，坡口均匀，角度偏差≤±2°，连接部位错壁≯1mm，保证零件对接面间隙均匀，焊接变形可控；通过将导管成型前的锁底焊缝安排在发动机上焊接控制连接部位错壁和对接间隙满足要求，待焊缝完全冷却后拆卸，保证导管整体焊接变形量控制在±1mm以内，装配应力小，相连组件内泄漏装配前后无变化，确保导管顺利合拢，最终满足整根导管的空间装配需求。The invention converts the spatial dimension measurement into the plane dimension measurement by making a measurement conversion device, reducing the difficulty of measurement; by making a self-positioning spherical guide bolt, the center of the interface flange connection is automatically aligned to ensure the accuracy and consistency of the measurement; by making adjustments Statistics of gaskets and welding shrinkage form a precise control method for welding shrinkage, which can determine the length of each segment after repair, and achieve controllable welding shrinkage; use angle grinder + file to manually refine the butt joint surface of each segment of the port, after finishing The flatness of the end face is ≯0.1mm, the bevel is uniform, the angle deviation is ≤±2°, and the wall of the connection part is ≯1mm to ensure that the gap between the butt surfaces of the parts is even and the welding deformation is controllable; The staggered wall and the butt joint gap of the upper welding control connection meet the requirements. After the weld is completely cooled, it is disassembled to ensure that the overall welding deformation of the catheter is controlled within ±1mm, the assembly stress is small, and the internal leakage of the connected components does not change before and after assembly, ensuring smooth closure of the catheter. , and ultimately meet the space assembly requirements of the entire catheter.
本发明未详细说明部分属本领域技术人员公知常识。Parts not described in detail in the present invention belong to the common knowledge of those skilled in the art.
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