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干道式高温热管工艺的薄弱环节通常根据经验来判断,很少进行系统的分析,为提高热管的可靠性并延长其寿命,对热管进行了工艺失效模式、影响及危害性分析(FMECA),计算得出吸液芯未紧贴管壳、干道坍塌、焊缝金属裂纹、焊缝气孔、熔透过大、冷焊封口裂纹为风险优先数较大的工艺故障模式,其对应的零件组装、焊接和封口工艺为热管的薄弱环节。从降低热管失效的严重程度出发,对封口裂纹提出改进措施。从减小故障发生概率和增大故障被检出的概率出发,对其他薄弱环节提出改进措施,为工艺人员和质量管理人员提供理论参考和实际指导。
The weak links of Trunk-type high-temperature heat pipe technology are usually judged based on experience. Few systematic analyzes are conducted. In order to improve the reliability and extend the life of the heat pipe, the process failure modes, effects and hazard analysis (FMECA) The result shows that the suction wick is not in close contact with the shell, the main road collapses, the weld metal cracks, the weld pores, the penetration is too large, and the cold seal is a risky process failure mode. The corresponding parts assembly and welding And the sealing process is the weak link of the heat pipe. From the perspective of reducing the severity of heat pipe failure, we propose improvement measures for sealing cracks. Starting from reducing the probability of occurrence of faults and increasing the probability of faults being detected, improvement measures are put forward for other weak links so as to provide theoretical reference and practical guidance for craftsmen and quality managers.