Stiffness matching method for the ball screw feed drive system of machine tools

He, Gaiyun; Shi, Panpan; Zhang, Dawei; Sun, Guangming

doi:10.1007/s12206-020-0630-5

Cited by 6 publications

(2 citation statements)

References 15 publications

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“…1,2 Due to high transmission efficiency, low sensitivity to external perturbations, high axial stiffness and long operating life, ball-screw, the transmission unit, is generally used in the feed system for high-speed Computer Numerical Control (CNC) machine tools. 3,4 The dynamic characteristics of the feed system play an important role in control performance and machining accuracy. For high precision machine tools, dynamic characteristics i.e.…”

Section: Introductionmentioning

confidence: 99%

Dynamic characteristics and research on the dual-drive feed mechanism

Lü

Liu

Zhang

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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The dual-drive feed mechanism (DDFM) based on the drive at the center of gravity (DCG) principle has been widely adopted in computer numerical control (CNC) machines and industrial robots that require high precision and high stability. The friction force affected by feed rates and moving parts positions can change the contact stiffness of kinematic joints, which can further impact on dynamic characteristics of the DDFM and cause dual axes difference. Considering the contact stiffness of kinematic joints, this paper adopts the lumped parameter method to establish the general dynamic model of the DDFM. The equivalent axial stiffness of kinematic joint and feed system transmission stiffness are all derived regarding the influence of feed rates and moving parts positions. The dynamic experiments on the DDFM with different feed rates and moving parts positions are carried out to verify the proposed model. The results suggest that in the motion stage, the DDFM’s natural frequency is greater than that in the static stage, and behaves differently in different feed rates and moving parts positions. The axial contact stiffness value of the ball-screw and nut B can reach 0 when the feed rate increases. When the moving parts are in the middle position of the crossbeam, the DDFM is the most stable and the dynamic performance is the best.

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Section: Introductionmentioning

confidence: 99%

Dynamic characteristics and research on the dual-drive feed mechanism

Lü

Liu

Zhang

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…Zou et al (2018) found that the nut joint stiffness greatly impact the vibration behavior of the spindle system in the driving direction depend on the three different nut joint stiffness models. He et al (2020) proposed a stiffness matching design method for the ball screw feed drive system. Zhang et al (2019aZhang et al ( , 2019b established the dynamic model of the feed system of slender ball screw and proposed a method to calculate the mass matrix and system stiffness.…”

Section: Introductionmentioning

confidence: 99%

Dynamic analysis of ball screw feed system with abrupt-change-nonlinear drive stiffness

Gao

2021

ILT

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Purpose For ball screw feed system, a sudden start or stop has a great influence on the transmission stiffness, so the axial stiffness mutation of feed system will occur. The purpose of this paper is to study the influence of acceleration on the transmission stiffness and dynamic characteristics of the ball screw feed system. Design/methodology/approach Taking the ball screw feed system as a research object, on the basis of the Hertz contact theory and the mixed element method, axial stiffness model and dynamic model are established. And the system stability was analyzed by the time history diagram and Phase-plane portrait diagram. The feed system was analyzed theoretically and experimentally, the experimental results are in good agreement with the model results. Findings Lead screw lead angle, preload, load and start acceleration affected ball-screw pair, bearing and transmission stiffness. And the load, nut contact stiffness, bearing contact stiffness, preload have a large effect on the transmission stiffness. The results show that a certain acceleration value will make the axial stiffness abrupt change. Originality/value This research provides a useful theoretical support for ensuring a good dynamic for the ball screw feed system.

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