PRELIMINARY SYNTHESIS OF A DEVICE FOR SIMULATING THE SELF-INDUCED VIBRATIONS WHEN CUTTING

• Published in: Proceedings in Manufacturing Systems Vol. 16; no. 1; pp. 13 - 20
• Main Authors: Slătineanu, Laurenţiu, Rădulescu, Bruno, Dodun, Oana, Hriţuc, Adelina
• Format: Journal Article
• Language: English
• Published: Bucharest University "Politehnica" of Bucharest, Machine and Manufacturing Systems Department and Association ICMAS 01.01.2021
• Subjects: Belt conveyors; Design; Friction; Mass-spring systems; Mathematical models; Parallelepipeds; Rotation; Values; Vibration
• ISSN: 2067-9238; 2343-7472

To explain how to generate self-induced vibrations in a cutting process, there are currently several hypotheses and mathematical models. Such a model is known as a mass-spring system on a moving belt. In principle, the model of the mass-spring system on a moving belt took into consideration the action of the frictional force generated by the movement of a part having a certain mass on the surface of a continuous belt wrapped in two wheels, one of which is a drive wheel. The part is supported laterally, in the direction of movement, by two springs. Using principles from axiomatic design, the paper proposes a variant of the device that considers the mass-spring system but with the use of a rotational motion instead of the motion along a linear trajectory. Functional requirements have been defined for this purpose, and appropriate solutions have been identified for meeting each of the functional requirements. An adaptable device has been designed as such on a universal lathe. A parallelepiped-shaped part pressed against the outer cylindrical surface of a ring-type part is used. Attention was paid to the possibilities of changing the values of some input factors to reveal the influence of these factors on some characteristics of the self-induced vibrations. Factors whose values may change are considered the peripheral speed of the ring-type part, the forces generated by the springs involved in the vibratory motion, the pressure force of the parallelepiped on the outer cylindrical surface of the ring.