| Cabin type equipment widely used in the fields of aviation, aerospace and other defense.As a high accuracy assembly, cabin docking is an important part of equipment manufacturing. The Cabin has a variety of models. Cabin docking installation is a small batch production process. Existing automated docking program assembly process, cabin machining error and adjust the position and orientation system precision factors, position and attitude of the docking cabin is difficult to accurately reach a predetermined position,docking with the cabin often exist large assembly stress, eventually a direct impact on the overall performance of the missile. By means of the traditional manual sling assembly,although can effectively reduce the assembly stress, but low efficiency and large labor intensity can not guarantee the homogeneity of the batch assembly performance. In order to reduce the internal stress of the assembly,the requirement of machining error and flexible control is put forward.The cabin automatic docking assembly is improved, the proposed compliant assembly process plan, compliant assembly posture adjusting principle based on, flexible design support platform, used in between the cabin and the docking device, artificial joint flexibility and agility, in the controllable range lower support assembly of rigid, release the local free, enhance the adaptability, realize the compliant assembly.According to the flexible supporting platform posture adjusting principle and function demand, based on static and dynamic change based on friction is the basic principle and design of adjustable flexible support unit, flexible support unit threshold adjustable, when the unit load is less than the threshold unit is rigid, only the flexible supporting platform supporting role; when unit force is greater than the threshold unit for flexible, through its passive stretching and rotating adjusting flexible supporting platform and cabin pose. On the threshold of rigid flexible transition flexible support unit was calculated in theory, by adjusting unit rigid flexible transition threshold setting supporting force of the unit of work to adapt to different types and weight of cabin assembly process of pose adjustment compensation.The adjustable flexible support unit is simulated by using finite element analysissoftware. Study on the threshold setting and working performance. By the analysis of stress of docking cabin, verify the performance of flexible support platform. Machining and manufacturing prototype and the experimental study on a single adjustable flexible support unit is carried out. The results show that the performance of the flexible support unit is stable, the range of threshold adjustment and the adjustment precision can meet the design requirements. Based on the experimental data and the theoretical calculation, the threshold calibration is used as a reference for the unit threshold setting. |
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