scholarly journals Comparative Analysis of Power Measurement Results in the Testing of Sand Mixers

2013 ◽  
Vol 13 (3) ◽  
pp. 119-122
Author(s):  
K. Smyksy ◽  
R. Wrona ◽  
E. Ziółkowski
Keyword(s):  
Power Efficiency ◽  
Energy Input ◽  
Power Measurement ◽  
Manufacturing Processes ◽  
Measurement Equipment ◽  
Power Demand ◽  
Measurement Results ◽  
Wide Variability ◽  
Process Line ◽  
Variable Energy

Abstract Investigations of operating parameters of widely used sand mixers reveal a wide variability range in the values of parameters associated with their power demand. Power efficiency of manufacturing processes has received a great deal of attention lately, which encourages the research efforts to optimise this aspects of operation of machines and installations as well. In the first place these machines and installations have to work properly as a part of the process line- which applies also to moulding sand mixers. Experiments conducted by the authors suggest that the same goal can be achieved at variable energy input levels. To obtain information about the power demands of sand mixers requires the use of highly specialised equipment, methodology and result processing procedures. This study provides a brief characteristic of measurement equipment and results of measurements taken on a unit AG-015 (based on a roller mixer) and a laboratory rotor mixer.

Power Measurement Equipment

2020 ◽  
pp. 59-78
Author(s):  
Stephen W. Fardo ◽  
Dale R. Patrick
Keyword(s):  
Power Measurement ◽  
Measurement Equipment

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

2019 ◽  
Vol 9 (11) ◽  
pp. 2293 ◽  
Author(s):  
Andreas Tausendfreund ◽  
Dirk Stöbener ◽  
Andreas Fischer
Keyword(s):  
Shock Waves ◽  
High Speed ◽  
Short Pulse ◽  
Milling Process ◽  
Manufacturing Processes ◽  
Speckle Photography ◽  
Machining Processes ◽  
Initial State ◽  
Multiple Loads ◽  
Measurement Results

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.

Quantifying Powder Losses and Analyzing Powder Conditions in order to Determine Material Efficiency in Laser Beam Melting

2016 ◽  
Vol 856 ◽  
pp. 231-237 ◽  
Author(s):  
Max Lutter-Günther ◽  
Alexander Hofmann ◽  
Christoph Hauck ◽  
Christian Seidel ◽  
Gunther Reinhart
Keyword(s):  
Laser Beam ◽  
Experimental Studies ◽  
Manufacturing Processes ◽  
Ecological Evaluation ◽  
Powder Bed ◽  
Material Efficiency ◽  
Laser Beam Melting ◽  
Measurement Results ◽  
Subtractive Manufacturing ◽  
End Use

Laser Beam Melting (LBM) is an additive manufacturing process, which is increasingly applied for the production of end use parts. One advantage of this powder bed fusion technology lies in the high material efficiency in comparison with subtractive manufacturing processes (i. e. milling, lathing). However, only few experimental studies have been conducted on the material efficiency of LBM. For the accurate evaluation of the LBM material efficiency, empirical values for powder losses are required. Furthermore, a lack of terminology for waste types and powder conditions in the context of LBM impedes communication and research on the topic. The presented paper aims to increase the understanding of material efficiency and powder conditions in Laser Beam Melting. A quantitative analysis of waste types is presented for different LBM application scenarios. This sets a basis for the ecological evaluation and comparison with conventional manufacturing processes. In order to achieve the aim, a terminology is introduced for waste types and powder conditions in the context of powder bed-based additive processes. Therefore, considerations regarding powder quality are taken into account. For the quantification of powder losses, the experimental setup and measurement results are described. Furthermore, loss types and their significance are analyzed and discussed.

scholarly journals Power Measurement for Sustainable High-performance Manufacturing Processes

Procedia CIRP ◽  
2014 ◽  
Vol 14 ◽  
pp. 466-471 ◽  
Author(s):  
Sean Humphrey ◽  
Helen Papadopoulos ◽  
Barbara Linke ◽  
Sindhu Maiyya ◽  
Athulan Vijayaraghavan ◽  
...  
Keyword(s):  
High Performance ◽  
Power Measurement ◽  
Manufacturing Processes

scholarly journals Photon diagnostics at the FLASH THz beamline

2019 ◽  
Vol 26 (3) ◽  
pp. 700-707 ◽  
Author(s):  
Rui Pan ◽  
Ekaterina Zapolnova ◽  
Torsten Golz ◽  
Aleksandar J. Krmpot ◽  
Mihailo D. Rabasovic ◽  
...  
Keyword(s):  
Pulse Energy ◽  
Power Measurement ◽  
Diagnostic Tools ◽  
Narrow Bandwidth ◽  
Spatial Beam ◽  
Measurement Results ◽  
Infrared Spectrometer ◽  
On Line ◽  
Transport Line ◽  
Range Jitter

The THz beamline at FLASH, DESY, provides both tunable (1–300 THz) narrow-bandwidth (∼10%) and broad-bandwidth intense (up to 150 uJ) THz pulses delivered in 1 MHz bursts and naturally synchronized with free-electron laser X-ray pulses. Combination of these pulses, along with the auxiliary NIR and VIS ultrashort lasers, supports a plethora of dynamic investigations in physics, material science and biology. The unique features of the FLASH THz pulses and the accelerator source, however, bring along a set of challenges in the diagnostics of their key parameters: pulse energy, spectral, temporal and spatial profiles. Here, these challenges are discussed and the pulse diagnostic tools developed at FLASH are presented. In particular, a radiometric power measurement is presented that enables the derivation of the average pulse energy within a pulse burst across the spectral range, jitter-corrected electro-optical sampling for the full spectro-temporal pulse characterization, spatial beam profiling along the beam transport line and at the sample, and a lamellar grating based Fourier transform infrared spectrometer for the on-line assessment of the average THz pulse spectra. Corresponding measurement results provide a comprehensive insight into the THz beamline capabilities.

Determination Analysis Model of Inter-Regional Power Replacement in our Country

2014 ◽  
Vol 644-650 ◽  
pp. 1519-1522
Author(s):  
Tao Lei ◽  
Chao Qin ◽  
Wei Xie ◽  
Li Wei Ju ◽  
Zhong Fu Tan
Keyword(s):  
Power Supply ◽  
Power Efficiency ◽  
Decision Problem ◽  
Power Transmission ◽  
Power Demand ◽  
Regional Power ◽  
Analysis Model ◽  
Pollutants Emission ◽  
Energy Grid ◽  
Analysis Models

To determine the inter-regional power replacement, this paper starts from the inter-regional power transmission and out-purchased demands and puts forward the analysis models of power transmission and out-purchased. Then it focuses on the decision problem of inter-regional power transmission and out-purchased where power supply exceeds power demand and provide the corresponding optimization algorithm. The models shows that inter-regional power replacement can reduce the generation pollutants emission, promote the power efficiency, and raise renewable energy grid-connected content like hydropower, wind power and so on, making magnificent economy and environmental effects.

Determination Analysis Model of Inter-Regional Power Replacement in China

2014 ◽  
Vol 909 ◽  
pp. 356-361
Author(s):  
Zhong Fu Tan ◽  
Hai Bo Liu ◽  
Li Qiong Lin ◽  
Zhi Hong Chen
Keyword(s):  
Power Supply ◽  
Power Efficiency ◽  
Decision Problem ◽  
Power Transmission ◽  
Power Demand ◽  
Regional Power ◽  
Analysis Model ◽  
Pollutants Emission ◽  
Energy Grid ◽  
Analysis Models

To determine the inter-regional power replacement, this paper starts from the inter-regional power transmission and out-purchased demands and puts forward the analysis models of power transmission and out-purchased. Then it focuses on the decision problem of inter-regional power transmission and out-purchased where power supply exceeds power demand and provide the corresponding optimization algorithm. The models shows that inter-regional power replacement can reduce the generation pollutants emission, promote the power efficiency, and raise renewable energy grid-connected content like hydropower, wind power and so on, making magnificent economy and environmental effects.

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