Study Of Multi-stage Deep Drawing For H-Bend Wave-guide

The H-bend wave-guide is the important part of the serve radar, and it is widely machined and applied. In this paper, the H-bend wave-guide is regarded as the research object, The advantages and disadvantages of four different kinds of machining processes which were machine-finishing, the precision casting, the sheet drawing and bends and cohere jointing were analyzed , the sheet drawing processing plan was choiced at last. In virtue of simulates technology(CAE), the multi-stage deep drawing processes of this part was studied. Simultaneously with the orthogonal optimization techniques the main several technics parameters influenced to the forming processes of H -bend wave-guide were also studied.In this paper, firstly the part was simultated with One-stage deep drawing ,and the results received was contrasted with intrinsic physical trial ,the coherence of them was educed: this method was not feasible. Then the method to form this component with three multi-stage deep drawing project is confirmed, some technics parameters are confirmed in each stage deep drawing processes. The drawing distorts parameter match of each stage drawing processes were also confirmed. the die mold of each stage drawing processes was set up using the UG modeling software, and then was inducted in simulation software Dynaform which is suitable for sheet forming finite element value. The corresponding finite element models were established and then the simulation were carried on. The semifinished materials stress strain information integrity was passed to the next stage's simulation. The final influence of the loading of fluctuant pressure, the geometry dimension of drawbead and material mechanical parameter to the quality of H-bend wave-guide was studied in this paper, and the limitations were finally founded. As the final results, the regular part was shaped by three multi-stage deep drawing , which was testified by contrasted experimentations.The first stage drawing process which the degree of distortion was the acutest was regarded as the research object, the pressure-pad-force , friction coefficient, punch-die gap and the fictitious velocity of punch were studied with the method of orthogonal , regarding drawing forming quality influence, And in virtue of the degree of the increasing and reduction, The best technical parameter array was the pressure-pad-force was 50KN, the friction coefficient was 0.09, the punch-die gap was 3.3mm and fictitious velocity of punch was 1500mm/s.