The paper presents the process of designing a lightweight vertical lathe with a steel–polymer frame. The purpose of using such a frame was to increase the stability of machining. As part of the study presented in this paper, polymer concrete was developed to provide a significant increase in the damping of steel structures (increase in the modal damping ratio for a steel beam by 239% and 81% reduction in the amplitude of the receptance function for the dominant resonance). Finite element models of lathes with steel–polymer concrete frame were built in three variants differing in polymer concrete filling distribution. Vulnerability of the machine tool variants to regenerative chatter instability was evaluated using frequency response functions calculated at tool-workpiece contact point. On the basis of the solution guaranteeing the highest stability of machining, a prototype lathe was built, subjecting model to experimental verification. The prototype lathe was characterized by up to 83% (on average 55%) reduction of relative tool-workpiece frequency response functions amplitudes, compared to steel variant.

本文介绍了设计轻型立式车床的步骤，该立式车床具有钢-聚合物框架。使用这种框架的目的是增加加工的稳定性。作为本文研究的一部分，开发了聚合物混凝土以显着提高钢结构的阻尼（钢梁的模态阻尼比提高239％，接收函数的振幅降低81％）。占主导地位）。钢-聚合物混凝土框架车床的有限元模型是根据聚合物混凝土填充分布的三种变化而建立的。使用在工具-工件接触点计算的频率响应函数，评估了机床变型对再生颤振不稳定性的脆弱性。在保证最高加工稳定性的解决方案的基础上，构建了原型车床，并对模型进行了实验验证。与钢制变体相比，原型车床的特征在于相对工具-工件频率响应函数幅度降低了83％（平均55％）。