External Calibration in PA12 Tube Extrusion

2006 ◽  
Vol 21 (1) ◽  
pp. 70-80 ◽  
Author(s):  
A. Carin ◽  
J.-M. Haudin ◽  
M. Vincent ◽  
B. Monasse ◽  
G. Bellet ◽  
...  
Keyword(s):  
External Calibration ◽  
Tube Extrusion

External Calibration in PA12 Tube Extrusion

2006 ◽  
Vol 21 (1) ◽  
pp. 70-80
Author(s):  
A. Carin ◽  
J.-M. Haudin ◽  
M. Vincent ◽  
B. Monasse ◽  
G. Bellet ◽  
...  
Keyword(s):  
External Calibration ◽  
Tube Extrusion

External Calibration in PA12 Tube Extrusion

2005 ◽  
Vol 20 (3) ◽  
pp. 305-311 ◽  
Author(s):  
A. Carin ◽  
J.-M. Haudin ◽  
M. Vincent ◽  
B. Monasse ◽  
G. Bellet ◽  
...  
Keyword(s):  
External Calibration ◽  
Tube Extrusion

External Calibration in PA12 Tube Extrusion

2005 ◽  
Vol 20 (3) ◽  
pp. 296-304 ◽  
Author(s):  
A. Carin ◽  
J.-M. Haudin ◽  
M. Vincent ◽  
B. Monasse ◽  
G. Bellet ◽  
...  
Keyword(s):  
External Calibration ◽  
Tube Extrusion

Simultaneous Diameter and Thickness Control in Tube Extrusion

1991 ◽  
Vol 6 (3) ◽  
pp. 188-194 ◽  
Author(s):  
G. Defaye ◽  
L. Caralp ◽  
B. Delfanne ◽  
J. J. Labaig
Keyword(s):  
Thickness Control ◽  
Tube Extrusion

The accuracy of external calibration markers in digital templating using the double marker and single marker method: a comparative study

2020 ◽  
Vol 140 (10) ◽  
pp. 1559-1565
Author(s):  
Y. Warschawski ◽  
I. Shichman ◽  
S. Morgan ◽  
O. Shaked ◽  
S. Garceau ◽  
...  
Keyword(s):  
Comparative Study ◽  
External Calibration ◽  
Digital Templating ◽  
Single Marker

Influence of Heating Models on Necking Deformation during Tube Extrusion Process

2011 ◽  
Vol 189-193 ◽  
pp. 1778-1781 ◽  
Author(s):  
Gui Hua Liu ◽  
Yong Qiang Guo ◽  
Zhi Jiang
Keyword(s):  
Temperature Gradient ◽  
Material Flow ◽  
Extrusion Process ◽  
Work Piece ◽  
Tube Extrusion ◽  
Deformation Parameters ◽  
Flow Features ◽  
Extrusion Forming ◽  
3D Software ◽  
Deform 3D

By using Deform-3D software, the necking extrusion forming processes of integer trailer axle with two different heating means which are Uniform Heating (UH) method and Partly Heating (PH) method with temperature gradient are simulated. The influence of deformation parameters such as friction factor, necking coefficient, different temperature distribution of work-piece on the material flow features, stress and strain field, loading force and deformation process are analyzed in detail. According to the numerical simulation results, using PH method with temperature gradient can improve necking deformation during tube extrusion process.

Numerical Analysis on the Extruded Volume and Length Ratios of Backward Tube to Forward Rod in Combined Extrusion Processes

2006 ◽  
Vol 519-521 ◽  
pp. 919-924 ◽  
Author(s):  
B.S. Ham ◽  
J.H. Ok ◽  
Jung Min Seo ◽  
Beong Bok Hwang ◽  
K.H. Min ◽  
...  
Keyword(s):  
Process Parameters ◽  
Material Flow ◽  
Volume Ratio ◽  
Forward Direction ◽  
Extrusion Process ◽  
Forming Load ◽  
Tube Extrusion ◽  
Corner Radius ◽  
Combined Operation ◽  
Simulation Results

This paper is concerned with forward rod extrusion combined simultaneously with backward tube extrusion process in both steady and transient states. The analysis has been conducted in numerical manner by employing a rigid-plastic finite element method. AA 2024 aluminum alloy was selected as a model material for analysis. Among many process parameters, major design factors chosen for analysis include frictional condition, thickness of tube in backward direction, punch corner radius, and die corner radius. The main goal of this study is to investigate the material flow characteristics in combined extrusion process, i.e. forward rod extrusion combined simultaneously with backward tube extrusion process. Simulation results have been summarized in term of relationships between process parameters and extruded length and volume ratios, and between process parameters and force requirements, respectively. The extruded length ratio is defined as the ratio of tube length extruded in backward direction to rod length extruded in forward direction, and the volume ratio as that of extruded volume in backward direction to that in forward direction, respectively. It has been revealed from the simulation results that material flow into both backward and forward directions are mostly influenced by the backward tube thickness, and other process parameters such as die corner radius etc. have little influence on the volume ratio particularly in steady state of combined extrusion process. The pressure distributions along the tool-workpiece interface have been also analyzed such that the pressure exerted on die is not so significant in this particular process such as combined operation process. Comparisons between multi-stage forming process in sequence operation and one stage combined operation have been also made in terms of forming load and pressure exerted on die. The simulation results shows that the combined extrusion process has the greatest advantage of lower forming load comparing to that in sequence operation.

New External Calibration Curves (ECCs) for the Estimation of Molecular Weights in Various Common NMR Solvents

2016 ◽  
Vol 22 (25) ◽  
pp. 8462-8465 ◽  
Author(s):  
Sebastian Bachmann ◽  
Roman Neufeld ◽  
Martin Dzemski ◽  
Dietmar Stalke
Keyword(s):  
External Calibration ◽  
Molecular Weights ◽  
Calibration Curves

Infant Warmer Equipped with Digital Weight Scales

2021 ◽  
Vol 14 (2) ◽  
pp. 68-72
Author(s):  
Muhammad Jundi Al'Aziz ◽  
Bambang Guruh Irianto ◽  
Abd Kholiq
Keyword(s):  
Body Weight ◽  
Human Body ◽  
Maximum Weight ◽  
Maximum Capacity ◽  
External Calibration ◽  
Measurement Results ◽  
The World ◽  
Measured Load ◽  
Error Percentage ◽  
Standard Weight

Scales Scales in the world of health are used to measure human body weight such as baby scales. Newborns are very important to be weighed because it is used as a measure of the baby's health indication ranging from 2.4 kg to 4.2 kg. The author makes a tool for this to make it easier for users to weigh with a 7 segment display on the Infant Warmer tool and external calibration. By using a loadcell sensor with a maximum capacity of 5 kg, the loadcell can detect the weight of the load where the voltage generated by the loadcell of 0.7 mV at a load of 1 kg is amplified to 0.62 V by the PSA circuit using the AD620 IC and then processed by Arudino UNO as a microcontroller. The weight results will be displayed on the 7Segment display located on the Infant Warmer tool. In the study, the measured load included a weight of 0 kg to a maximum weight of 5 kg. The measurement of the data results was carried out 5 times each by comparing the modules that had been made with the standard weight, namely (lead). The data from the measurement results of the research module shows that when the weight of the measurement at 1 kg has an error percentage of 0.08%. Measurements at a weight of 2 kg have an error percentage of 0.05%. Measurement of weight 3 kg has a presentation error of 0.01%. Measurements at a weight of 4 kg have a presentation error of 0.02%. And measurements at a weight of 5 kg have an error percentage of 0.04%. Then the data from the measurement results of the research module shows the largest error presentation of 0.08% at a weight of 1 kg. And the data from the measurement results of the research module shows the smallest error presentation of 0.01% at a weight of 3 kg. Making a research module in the form of a scale placed on an infant warmer can make it easier for the wearer.

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