Development of a parametric dimensional series of wedge-hinge presses with a concave wedge for the implementation of waste-free methods of cutting sectional rolled products
DOI:
https://doi.org/10.37142/2076-2151/2025-1(54)188Keywords:
stiffness, energy, classification, kinematic and force parameters, system of preferred numbers, golden ratio, geometric progression.Abstract
Karnaukh S., Chosta N. Development of a parametric dimensional series of wedge-hinge presses with a concave wedge for the implementation of waste-free methods of cutting sectional rolled products
The purpose of this work is to develop a parametric size range of presses for the implementation of waste-free methods of separating sectional rolled products using a wedge-hinge mechanism. Based on the developed classification of wedge-hinge mechanisms and conducted research, the feasibility of using a wedge-hinge mechanism with a concave wedge in presses for the implementation of waste-free separation processes has been justified. The force deformation graph of this mechanism is the closest to the typical technological graph of force change during separation. The wedge-hinge mechanism with a concave wedge has a smaller height of parts compared to crank mechanisms, which ensures lower elastic deformation and dynamics of the press. Theoretical studies of the wedge-hinge mechanism with a concave wedge were conducted using grapho-analytical and analytical methods of the theory of mechanisms and machines. Mathematical models of the wedge-hinge mechanism with a concave wedge, represented as a two-slider linkage mechanism, have been developed, allowing for its structural, kinematic, and dynamic analyses. Based on the analysis of the proposed mathematical models, a methodology for calculating the geometric, kinematic, and force parameters of the wedge-hinge mechanism with a concave wedge for the processes of separating sectional rolled products has been developed. It is proposed to use a new system of preferred numbers (R6 extension) for the development of a parametric size range of presses with a wedge-hinge drive with a concave wedge for the implementation of waste-free methods of separating sectional rolled products. A comparative analysis of the calculated parameters of the proposed press series, obtained using this methodology, and the passport data of typical sectional shears showed that the utilization coefficient of the new design presses in terms of force increases from (0,3...0,4) to (0,7...0,8).
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