Next Article in Journal
Mapping Areal Precipitation with Fusion Data by ANN Machine Learning in Sparse Gauged Region
Previous Article in Journal
A Size-Controlled AFGAN Model for Ship Acoustic Fault Expansion
Open AccessArticle

Induction of Highly Dynamic Shock Waves in Machining Processes with Multiple Loads and Short Tool Impacts

1
University of Bremen, Bremen Institute for Metrology, Automation and Quality Science (BIMAQ), Linzer Straße 13, 28359 Bremen, Germany
2
MAPEX Centre for Materials and Processes, University of Bremen, 28359 Bremen, Germany
*
Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(11), 2293; https://doi.org/10.3390/app9112293
Received: 15 April 2019 / Revised: 27 May 2019 / Accepted: 30 May 2019 / Published: 4 June 2019
(This article belongs to the Section Optics and Lasers)
In order to study the mechanical loads of a workpiece in manufacturing processes such as single-tooth milling, in-process measurements of workpiece deformations are required. To enable the resolution of shock waves due to the mechanical impact of the tool, a novel measurement system based on speckle photography is introduced to measure the dynamic deformations and strains with a high temporal and spatial resolution. The measurement results indicate deformations and strains propagating through the workpiece with the speed of sound triggered by the tool impact (i.e., the tool impact is shown to induce shock waves during milling). Finite element simulations of the workpiece behavior are performed in addition, which support the experimental findings. In the considered case, the dynamic excitation subsides after 300 ms. Hence, in processes with even shorter cyclic multiple loads, the tool encounters an already excited initial state during machining, which needs to be taken into account when precisely modeling the milling process and the resulting workpiece quality. Finally, the measurement results demonstrate that speckle photography in combination with modern high-speed cameras and compact short-pulse lasers provides a deeper understanding of individual manufacturing processes. View Full-Text
Keywords: speckle photography; process dynamics; single-tooth milling; chip formation; finite element method simulation speckle photography; process dynamics; single-tooth milling; chip formation; finite element method simulation
Show Figures

Figure 1

MDPI and ACS Style

Tausendfreund, A.; Stöbener, D.; Fischer, A. Induction of Highly Dynamic Shock Waves in Machining Processes with Multiple Loads and Short Tool Impacts. Appl. Sci. 2019, 9, 2293.

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