Open Information and Computer Integrated Technologies（2018）
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摘要
This work is devoted to experimental studies of the strength and accuracy characteristics of adhesive bonding guide elements with the basic elements of the stamp in the prefabricated universal readjusted stamps (PURS). The design of these stamps allows the installation of guide elements in the necessary from the technological and structural points of view, the points of the basic elements. A feature of this autonomous directional system is the method of its fixing, which determines the achievable accuracy and strength characteristics of the PURS. In contrast to the fixing of the guide elements on the press fit in special stamps in the studied structures of the stamps, a method of fixing and precise centring of the seating parts of the guide columns and bushings using glue materials based on epoxy resins was applied. This method of fixing significantly affects the accuracy of execution and installation of the guide block, since it plays a particularly important role in the system “press - guide block - cutting parts of the stamp”. Studies on the results of mathematical processing of experiments allowed us to determine the functional dependence of the strength of adhesive bonding based on epoxy resins of the guide column in the base plates of universal pre-adjustable re-dies. As variables, the force of extrusion was considered: the diameter and length of the nozzle portion of the guide elements in the base elements of the dies. Comparison of all the obtained results showed that the magnitude of the extrusion effort and the length of the nozzle portion at fixed diameter values are interconnected by such dependence that the function can be taken as proportional. The change in the force of extrusion with increasing diameter and fixed values of the length of the nozzle portion has a low intensity. It was established that the theoretical results on the definition of the functional dependence of the strength of adhesive bonding differ by no more than 5%, and the strength of adhesive bonding is 2.2 – 2.4 times higher than the press head of the guide columns and the accuracy of their installation in basic slabs.
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