Analysis of the Combined Application of Wedge-Joint and Crank-Circular Mechanisms
DOI:
https://doi.org/10.32515/2664-262X.2026.13(44).97-107Keywords:
wedge-joint mechanism, crank-circular mechanism, rolled product separation, press stiffness, dynamic loadsAbstract
The purpose of the article is to provide a scientific substantiation of the feasibility and effectiveness of the combined application of a wedge-joint mechanism with a concave wedge and a crank-circular mechanism in equipment for the separation of rolled bars and tubes. Particular attention is paid to the problem of instantaneous release of the accumulated elastic energy of the press system at the moment the separation process is completed. The obtained results are intended to serve as a basis for the development of energy-efficient, reliable, and high-precision press equipment of a new generation.
The paper presents a structural and kinematic analysis of a crank-circular mechanism driven by a wedge-joint mechanism with a concave wedge. The methodological framework of the study is based on analytical methods of the theory of mechanisms and machines, as well as grapho-analytical methods for investigating the velocities and accelerations of characteristic points and links of the mechanism. The class of the mechanism, its mobility, and its structural configuration are determined using Assur groups. Analytical relationships are obtained that link the geometric parameters of the mechanism with the displacements, velocities, and accelerations of the actuating links. The influence of the combined mechanisms on the formation of a complex planar trajectory of tool motion is investigated. Conditions for reducing peak forces and the energy intensity of the rolled product separation process are analyzed. The developed and patented equipment design ensures improved geometric accuracy of workpieces and enhanced operational reliability of the machine. The obtained scientific findings can be applied in the design, modernization, and optimization of presses for rolled product separation with increased requirements for energy efficiency, dynamic stability, and durability.
As a result of the study, it is established that the combined application of wedge-joint and crank-circular mechanisms makes it possible to fundamentally change the loading pattern of the press system throughout the working cycle. The obtained kinematic relationships indicate the possibility of reducing peak velocities and accelerations in the final phase of the working stroke, which directly contributes to a reduction in dynamic loads. It is proven that the formation of a complex planar motion of the tool promotes the concentration of deformation in the cutting zone and reduces the energy-force parameters of the process. The results of the analysis confirm the expediency of using compact actuating mechanisms in press equipment for rolled product separation.
References
Список літератури
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References
1. Karnaukh S. G., Markov O. E., Shapoval A. A., Zubenko K. V. Development and research of the stamp for cutting of a rolled stock with a differentiated clamp. FME Transactions. 2022. 50 (4). 674–682. DOI: 10.5937/fme2204674K.
2. Karnaukh S. G., Markov O. E., Aliiev I. S., Stankov V. U. Cutting of rolled metal with a stress concentrator marked by the elastic deformation of the press. The International Journal of Advanced Manufacturing Technology. 2025. 136. 3791–3801. DOI: 10.1007/s00170-025-15043-7.
3. Kaczmarczyk J., Grajcar A. Numerical simulation and experimental investigation of cold-rolled steel cutting. Materials. 2018. 11. 1263. DOI: 10.3390/ma11071263.
4. Pursche F., & Meyer L. W. Correlation between dynamic material behavior and adiabatic shear phenomenon for quenched and tempered steels. Engineering Transactions. 2014. 59(2). 67–84. DOI: 10.24423/engtrans.150.2011.
5. Dong Y., Ning J., Dong P., Ren Y., Zhao S. Investigation of fracture behavior and mechanism in high-speed precise shearing for metal bars with prefabricated fracture-start kerfs. Materials. 2020. 13. 4073. DOI: 10.3390/ma13184073.
6. Lim JH., Lee SW., Lee J. et al. Pure mechanical impact trimming for ultra high-strength steels: A strain rate-managed approach to enhance shear edge quality without thermal effects. International Journal of Precision Engineering and Manufacturing-Green Technology. 2025. 12. 1763–1793. DOI: 10.1007/s40684-025-00720-5.
7. Liu Y., Shu Y., Hu W., Zhao X., & Xu Z. Active vibration control of a mechanical servo high-speed fine-blanking press. Strojniški vestnik – Journal of Mechanical Engineering. 2021. 67(9). 445-457. DOI: 10.5545/sv-jme.2020.6959.
8. Hofmann J., Veitenheimer C.-V., Fei C.; Chen, C. et al. Development of robust machine learning models for tool-wear monitoring in blanking processes under data scarcity. Applied Sciences. 2025. 15(19). 10323. DOI: 10.3390/app151910323.
9. Ghiotti A., Regazzo P., Bruschi S., Bariani P. F. Reduction of vibrations in blanking by MR dampers. CIRP Annals. 59. 1. 2010. 275-278, ISSN 0007-8506. DOI: 10.1016/j.cirp.2010.03.111.
10. Kandyak N., & Ostafiychuk Y. Improvement of the kinematic characteristics of the die press drive using a combined crank-hinged mechanism. Technical sciences and technologies. 2025. 3(41). 54–62. DOI: 10.25140/2411-5363-2025-3(41)-54-62 [in Ukrainian].
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12. Pasika V., Augousti A., Lanets O., and Parashchyn O. Reducing the kinetic power of the crank press machine. Ukrainian Journal of Mechanical Engineering and Materials Science. 2023. 9. 3. 21–30. DOI: 10.23939/ujmems2023.03.021.
13. Tong Z., Lin C.; Li F., Chen T. Application of hybrid cellular automata method for high-precision transient stiffness design of a press machine frame. Processes. 2025. 13. 3726. DOI: 10.3390/pr13113726.
14. Wonseok Shin, Jung Kim. Switchable compliant actuator with fast stiffness modulation and energy efficient power transmission. Mechatronics. 2023. 90. 102929. ISSN 0957-4158. DOI: 10.1016/j.mechatronics.2022.102929.
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18. Karnaukh S. G, Chosta N. V., Markov O. E., Kukhar V. V. Development and research of the press operating mechanism, made in the form of the wedge-joint mechanism with a curving wedge for separation operations. The International Journal of Advanced Manufacturing Technology. 2021. 116. 3305–3314. DOI: 10.1007/s00170-021-07718-8.
19. Karnaukh S. G., Karnaukh D. S. Device for dividing rolled bars into measured blanks by the method of eccentric twisting : Patent 51501, Ukraine, IPC B23D 31/00, B23D 23/00. Application u200911584; filed November 13, 2009; published July 26, 2010. Bulletin 14. [in Ukrainian].
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