scholarly journals Optical in-process height measurement system for process control of laser metal-wire deposition

2020 ◽  
Vol 62 ◽  
pp. 23-29 ◽  
Author(s):  
Shigeru Takushima ◽  
Daiji Morita ◽  
Nobuhiro Shinohara ◽  
Hiroyuki Kawano ◽  
Yasuhiro Mizutani ◽  
...  
Keyword(s):  
Process Control ◽  
Measurement System ◽  
Metal Wire ◽  
Height Measurement

scholarly journals BATH LEVEL MEASUREMENT SYSTEM IMPROVES EAF MELTING PROCESS CONTROL

2014 ◽  
Author(s):  
Patrik Bloemer ◽  
Jan-Peter Nilsson ◽  
Anthony Lyons ◽  
Christer Carlsson ◽  
Ivo Filipovic ◽  
...  
Keyword(s):  
Process Control ◽  
Measurement System ◽  
Melting Process ◽  
Level Measurement

A Height Measurement Based on Laser Triangulation Probe and a Two Dimensional Image Measurement System for Smart Manufacturing

2015 ◽  
Vol 764-765 ◽  
pp. 1324-1328
Author(s):  
Pen Han Chen ◽  
Chien Hung Liu ◽  
Yu Fen Chen ◽  
Hung Sheng Chiu ◽  
Yu Chi Liu
Keyword(s):  
Measurement System ◽  
Smart Manufacturing ◽  
Measuring Error ◽  
Laser Triangulation ◽  
Two Dimensional ◽  
Image Measurement ◽  
Height Measurement ◽  
Dimensional Image ◽  
Two Dimensional Image ◽  
Auto Focusing

This paper integrated a laser triangulation probe with a two-dimensional image measurement system to measure the height of an object using the auto-focusing method. In the laser triangulation probe, the laser diode was used as the light source and one-dimensional position sensitive detector was adopted to receive the position of the laser spots to detect the height. The laser triangulation probe was used for small height measurement and the auto-focusing method was used for large height measurement. Two standard gauges with thicknesses of 8mm and 8.5mm were used to verify our proposed method. With height difference of 500μm, the experiment results showed the measuring error was within ±3μm and standard deviation was about 0.1μm.

Measurement System Analysis Combined with Shewhart’s Approach

2015 ◽  
Vol 637 ◽  
pp. 7-11 ◽  
Author(s):  
Magdalena Diering ◽  
Adam Hamrol ◽  
Agnieszka Kujawińska
Keyword(s):  
Process Control ◽  
Control Chart ◽  
Measurement System ◽  
Manufacturing Process ◽  
Control Charts ◽  
System Analysis ◽  
Standard Procedure ◽  
Reference Value ◽  
Measurement Systems ◽  
On Line

The paper presents new procedure of methodology for statistical assessment of measurement systems variation (methodology known in the literature as Measurement Systems Analysis, MSA). This procedure allows for calculation and monitoring in real time (that is on-line) of measurement system (MS) characteristics which determine its usability for manufacturing process control. The presented solution pointed out the gap in process control, which consists in lack of methods for monitoring measurement processes in the on-line way. Their key point consists of taking samples that are also needed for the process control chart for the needs of the MSA method. This means that the samples are taken directly from the production line and during the production process. The method is combined with the standard procedure of statistical process control (SPC) with the use of process control charts. It is based on two control charts. The first one is called AD-chart (Average Difference chart) and it allows to estimate the variation between the operators and stability of the monitored measurement system. The second control chart illustrates the %R&R index (Repeatability and Reproducibility) and allows to monitor the MS capability.The paper also presents authors’ proposal of guidelines about the reference value for the %R&R index calculation and assessment. Recommendations and guidelines for choosing the reference value are based on two criteria: information about sample and manufacturing process variation and the purpose of using MS (product or process control).

Peak Height Measurement System for Pulsed Laser Experiments

1973 ◽  
Vol 44 (8) ◽  
pp. 978-981 ◽  
Author(s):  
Robert L. Swofford ◽  
W. M. McClain
Keyword(s):  
Measurement System ◽  
Pulsed Laser ◽  
Peak Height ◽  
Height Measurement ◽  
Laser Experiments

Analysis of the Laser Droplet Formation Process

2005 ◽  
Vol 128 (1) ◽  
pp. 307-314 ◽  
Author(s):  
Tadej Kokalj ◽  
Jure Klemenčič ◽  
Peter Mužič ◽  
Igor Grabec ◽  
Edvard Govekar
Keyword(s):  
Process Control ◽  
Process Parameters ◽  
Formation Process ◽  
Droplet Formation ◽  
Metal Wire ◽  
Experimental Results ◽  
Main Process ◽  
Control Parameters ◽  
Alloy Wire

In this paper, a novel laser droplet formation process (LDFP) from a metal wire is investigated. The process consists of the formation of a molten pendant droplet and its detachment, which are both unstable and influenced by numerous process parameters. The goal of the investigation is to specify the main process parameters and the values that provide for stable and repeatable process. Based on theoretical and experimental consideration of LDFP, a methodology for estimation of process control parameters is proposed. Estimation of the parameters is demonstrated on examples of deposited droplets of nickel and tin-alloy wires. Experimental results on tin-alloy wire indicate that the problem of splashes on the substrate is still present, while those on nickel reveal an acceptable formation of droplets.

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