Research of a new design of the installation with a wedge-hinged mechanism with a rotary knife for separating shaped rolled products
DOI:
https://doi.org/10.37142/2076-2151/2024-1(53)159Keywords:
wedge, knife, workpiece, shear segment, rotary-forward movement, moment, quality.Abstract
Karnaukh S., Chosta N.
Research of a new design of the installation with a wedge-hinged mechanism with a rotary knife for separating shaped rolled products
Roll separation operations differ from other operations of processing materials by pressure in that, for their implementation, it is necessary to ensure the maximum force of separation at the beginning of the work cycle. On the basis of literature and patent searches, an improved design of the wedge-hinged mechanism with a concave wedge with a rotary knife was developed, which, according to the graph of the deformation force, is as close as possible to the typical force graph characteristic of separation processes. The wedge-hinged mechanism has fewer friction surfaces. It is more technological in manufacturing compared to the well-known wedge-hinged mechanism with a concave wedge. On the basis of the proposed mathematical model of the new design of the installation with a wedge-hinged mechanism for separating profiled rolled products of a complex configuration and modeling analysis using the DEFORM software complex, a method of selecting geometric parameters during the design of such mechanisms that provide optimal cutting modes has been developed. Recommendations have been developed for choosing the value of the hinge center coordinate, which should be equal to half the radius of the concave wedge. As this parameter increases, the amount of force, and separation moment increases. With the approach of the hinge to the concave surface of the wedge, with the same values of the displacement of the wedge, the magnitude of the angle of rotation and the displacement of the movable knife decrease. Recommendations are given regarding the orientation of the roll supply to the cutting zone. The analysis of the obtained data allows us to conclude that the power parameters of the separation process practically do not depend on the orientation of the shaped P-shaped profile of the rolled product during complex rotational-translational motion. The simulation results prove that the use of a new design installation provides a reduction in the energy parameters of the separation process in comparison with known designs of modern equipment. The use of the installation ensures an increase in the quality of cut blanks.
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