OBRABOTKAMETALLOV Vol. 23 No. 3 2021 MATERIAL SCIENCE EQUIPMENT. INSTRUMENTS 5 1 3 The results of theoretical calculations for the synthesis of the cam-rocker mechanism No. Н, m а, m L, m ρmin, m θ, deg. Analogue of the angular acceleration ε, s–2 Analog of the angular velocity ω, s–1 Characteristics of curves, deg. 1 0.025 0.128 0.06 0.09 103 –0.160 0.098 dwell ≈80 2 0.025 0.128 0.06 0.07 103 –0.172 0.101 dwell ≈80 3 0.025 0.128 0.06 0.05 103 – – discontinuities of function 4 0.025 0.128 0.08 0.09 103 0.046 0.067 no dwell 5 0.025 0.128 0.09 0.09 103 0.040 0.060 no dwell 6 0.025 0.130 0.06 0.09 103 0.055 0.040 no dwell 7 0.025 0.140 0.06 0.08 103 0.024 0.018 no dwell 8 0.025 0.128 0.06 0.09 110 0.040 0.024 no dwell 9 0.025 0.128 0.06 0.08 120 0.172 0.10 dwell ≈80 10 0.025 0.128 0.06 0.09 105 0.174 0.12 dwell ≈80 Conclusion The main purpose, set in the work, is to improve the quality of the processed product, which is obtained through the developed mechanism, including the synthesis of cam and rocker groups, providing the necessary degree of mobility and link sizes. So for the cam mechanism, the rational parameters of the links are: center distance a = ОО1 = 128 mm; rocker swing angle θ = 103°; the initial angle ψ0 = 470° for given dimensions of the rocker arm L = 60 mm, the roller diameter equal to 60 mm, and the use of the law of motion of the roller center along the cycloid with the curve angle β = 180° and the pusher journey H = 25 mm. To obtain the length of the working shaft of the machine, the synthesis of the rocker group provided the angle of the initial position of the collet and the rocker equal to O1BO2 = 90°. The quality of the mixture was evaluated by the angle of the stagnant zone, which is formed during the movement of bulk material. In static conditions, it is equal to 0.846, and with a variable angular velocity 0.550. In addition, inertial forces, which in present case will change sign four times in one cycle, will provide shaking and rebound of the crumbly mass from the blades. All these activities will improve the quality of the mixture. References 1. Chen K., Wang M., Huo X., Wang P., Sun T. Topology and dimension synchronous optimization design of 5-DoF parallel robots for in-situ machining of large-scale steel components. Mechanism and Machine Theory, 2023, vol. 179, p. 105105. DOI: 10.1016/j.mechmachtheory.2022.105105. 2. Flores P., Souto A.P., Marques F. The fi rst fi fty years of the Mechanism and Machine Theory: Standing back and looking forward. Mechanism and Machine Theory, 2018, vol. 125, pp. 8–20. DOI: 10.1016/j. mechmachtheory.2017.11.017. 3. Hsieh J.-F. Design and analysis of indexing cam mechanism with parallel axes. Mechanism and Machine Theory, 2014, vol. 81, pp. 155–165. DOI: 10.1016/j.mechmachtheory.2014.07.004. 4. Eckhardt H.D. Kinematic design of machines and mechanisms. 1st еd. New York, McGraw-Hill, 1998. 620 p. ISBN 0070189536. ISBN 978-0070189539. 5. Zhu B., Zhang X., Zhang H., Liang J., Zang H., Li H., Wang R. Design of compliant mechanisms using continuum topology optimization: a review. Mechanism and Machine Theory, 2012, vol. 143, p. 103622. DOI: 10.1016/j. mechmachtheory.2019.103622.
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