Next Article in Journal
Isokinetic Strength in Peritoneal Dialysis Patients: A Reliability Study
Next Article in Special Issue
Contrast Experiments in Dielectrophoresis Polishing (DEPP)/Chemical Mechanical Polishing (CMP) of Sapphire Substrate
Previous Article in Journal
Biomimicry in Bio-Manufacturing: Developments in Melt Electrospinning Writing Technology Towards Hybrid Biomanufacturing
Previous Article in Special Issue
A Study on the Deformation Behavior of a Microstructure Depending on Its Shape and the Cutting Section in the Precision Cutting of a Functional Part
Open AccessArticle

A Dedicated Design Strategy for Active Boring Bar

Department of Industrial Engineering, University of Firenze, Via di S. Marta, 3, 50139 Firenze, Italy
*
Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(17), 3541; https://doi.org/10.3390/app9173541
Received: 31 July 2019 / Revised: 21 August 2019 / Accepted: 23 August 2019 / Published: 28 August 2019
Unstable vibrations (i.e., chatter) onset is one of the main limits to productivity in deep boring bar processes. Active damping systems allow to increase machining stability in different configurations (i.e., tool setup), without requiring cutting system dynamic characterization. Design of an active boring bar involves the development of monitoring system (sensors), actuation system and control logic. While several control logics were evaluated and discussed, few design solutions were presented in the literature, focusing only on building prototypes to demonstrate control logic effectiveness. In the presented work, a deep analysis of the main issues and requirements related to active boring design was carried out and a systematic approach to tackle all the critical aspects was developed. The results of the proposed method are: (i) optimal actuators positioning able to damp vibration along two directions; (ii) preload system design guaranteeing the correct actuator preloading for the operating conditions; (iii) covers design to protect actuators and ensure the dynamic and static equivalence between active and standard boring bar. Following this approach, an active boring bar was designed, realized and tested. The results prove the required equivalence between active and original boring bar and assess the damping effect. View Full-Text
Keywords: active damping; boring; machining; dynamics active damping; boring; machining; dynamics
Show Figures

Figure 1

MDPI and ACS Style

Grossi, N.; Croppi, L.; Scippa, A.; Campatelli, G. A Dedicated Design Strategy for Active Boring Bar. Appl. Sci. 2019, 9, 3541.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop