FINAL AND ELEMENT MODELLING OF THE FORGE BROACH OF STRIPS WITHOUT CHANGE OF FORM AND SIZES IN THE CONDITIONS OF ALTERNATING DEFORMATION

The paper considers a proposal to design a new tool deformation and forging technology of cast ingots without changing the shape and size of the blank. The rational form of backups was determined, providing a uniform in volume significant deformation elaboration of the ingot by facilitating the implementation of an alternating strain. The essence of the proposed solution is as follows. The backup has two sections of the working surface: smooth and profiled. The profile zone of the working surface is provided with projections and recesses in the form of segments of a cylindrical surface arranged to broach axis angle 90° (Fig. 1). As a result of reduction, due to the introduction of cylindrical protrusions of the engraving of the dies, the height of the blank is reduced. The displaced metal fills the recess of the cylindrical shape and the height of the blank at that location is incremented (Fig. 1, a). After the displacement and reduction of the blank in the dies with a smooth area, it takes the original size (Fig. 1, б), providing the alternating deformation. During the development of the technological process, the correlation of the reduction modes with the size of the blank and stamps with profile surface at conditions of complete filling of the engraving of the stamp at a deposit and ensure uniform distribution of deformation throughout the volume of the forging.

cast structure, alternating deformation, degree of dispersion, math modeling, stressed and strained states, stressed state parameters, degree of shear strain

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