Авіаційно-космічна техніка та технологія (Aug 2020)
MATION OF FORM OF SPATIAL SHELLS BY METHOD OF EXPLOSIVE STAMPING
Abstract
A target of work is verification of the adequacy of the theoretical model of correction by the dynamic fold and verification of capacity of principle technological charts of the explosive stamping of flat purveyances. Of researches, exposure is a task of technological dependences, the receipt of which is possible only by the experimental path. The article presented results of experimental verification of the technological process of formation of form for the spatial shells on the typical models. Of the conducted work verification was a target of the rightness of theoretical positions, results of mathematical design and conclusions, and also approbation of methods of computations of technical parameters and charts of punching. The experiments are conducted on the flat models of edging, spherical and parabolic edging of large flexibility, and also curvilinear baskets models, models, and model standards. In the article, a process is explored of slanting collision, remaining tensions, deformations, and form of edging after deformation. Influencing of size, forms, and distances of charge on deviation from the matrix. The approbation was conducted on the party of the spherical model edging. Purveyances are approved on the model fragment. Formulated conclusions and prospects of development and introduction of technology in thermonuclear researches, building, mining industry, rocket, and air production. Experimentally it is set, that the reduction of distance below recommended results in exceeding of deformation of punching of the middle part (curvature more than matrix) and reduction of deformation of punching of the periphery (curvature is a less than matrix). Most rejections are details noticeable in the angular areas. This it is possible to explain by the regional effect from the waves of unloading, and by some asymmetry of installation of charge. The greater part of the surface has a rejection of about 1 mm, which is exceeded by exactness on 8 degrees on the base of 1200 mm. Application of technological admittances by the size of about 50 mm with subsequent their deleting, allows to decrease the mean deviation twice (0,5 mm), and promote exactness of the prepared edging. The experimental working off of technology of correction of declivous petals of double curvature showed a rightness of outputs of the theoretical part.
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