直升机液压系统的等边多面体焊接变形控制方法

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直升机液压系统的等边多面体焊接变形控制方法

本发明涉及一种用于直升机液压系统中的等边多面体焊接变形控制方法。本发明采用专用夹具将管接头固定并对焊缝的收缩变形量进行补偿，利用分步焊接的方法进行焊接，在焊接过程中，采用可行范围内较小的焊接电流，使焊接过程中输入线能量少，由于，可行范围内较小的电极，使焊接电流能量相对集中，对需焊接部分集中、快速加热，减少了热影响区面积，缩短了接头在敏化区停留时间；焊接过程中，所采用的冷却方式，降低接头在敏化区停留时间，而且缩短了接头整体冷却时间；在分层焊接中采用对称焊，面在组装焊接中采用分散焊接的方式，使得环件组件不但变形量最小，而且达到了所有导管长度控制在所要求的范围之内。

Equilateralpolyhedron welding deformation control method for hydraulic system ofhelicopter

Theinvention relates to an equilateral polyhedron welding deformation controlmethod for a hydraulic system of a helicopter. A pipe joint is fixed by aspecial clamp, the contraction deformation of a weld seam is compensated, andwelding is carried out by a step-by-step welding method. In the weldingprocess, small welding current within the feasible range is adopted, so thatheat input in the welding process is small, and due to the fact that a smallelectrode within the feasible range enables welding current energy to beconcentrated relatively, a part to be welded is rapidly heated in aconcentrated mode, the area of a heat affected zone is reduced, and the stayingtime of the joint in a sensitized zone is shortened. A cooling mode adopted inthe welding process shortens the staying time of the joint in the sensitizedzone, and the overall cooling time for the joint is shortened. Symmetricalwelding is adopted during layered welding, a dispersed welding mode is adoptedfor surfaces in the assembly welding process, and therefore the deformation ofring assemblies is the minimum, and the lengths of all conduits are controlledwithin the required range.