Preload adjustment for ball screw drives by means of passive mechanics

通过被动机械装置调节滚珠丝杠传动装置的预紧力

• 批准号: 426472450
• 负责人: Dr.-Ing. Armin Lechler
• 金额: --
• 依托单位: Institut für Steuerungstechnik der Werkzeugmaschinen und Fertigungseinrichtungen (ISW)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2020
• 资助国家: 德国
• 起止时间: 2019-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/426472450?language=en
• 关键词: Preload; adjustment; ball; screw; drives

Ball screw drives are mechanical elements used in machine tools to provide specified feed motion. Relevant characteristics for static and dynamical behavior of the applied feed drive in this project are load capacity, precision and stiffness. One essential design of the ball screw drive is the implemented preloaded double nut. The intensity of the preload, however, is a compromise between contradicting objectives and, furthermore, it decreases over time. Active actuators for adjustment of the preload are complex and have negative influence on the operation characteristics. In the proposed research project, a novel concept for a load-adaptive adjustment of the preload shall be developed. The approach is based on passive mechanical elements and is validated via simulative and experimental methods. Preliminary studies demonstrated the feasibility of using a spring mechanism, which affects the pitch offset of the nuts. The consequence is the adjustment of the preload based on the maximum axial load.

滚珠丝杠传动是用于机床的机械元件，用于提供特定的进给运动。本项目中应用的进给驱动器的静态和动态行为的相关特征是承载能力、精度和刚度。滚珠丝杠传动的一个基本设计是实施预加载的双螺母。然而，预载荷的强度是矛盾目标之间的折衷，而且随着时间的推移而降低。用于调节预载的主动致动器是复杂的，并且对操作特性具有负面影响。在拟议的研究项目中，应开发一种新的概念，用于对预载荷进行自适应调整。该方法是基于被动机械元件，并通过仿真和实验方法进行验证。初步研究证明了使用弹簧机构的可行性，这会影响螺母的螺距偏移。其结果是根据最大轴向载荷调整预载荷。