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Testing and Measuring Tech Cell >
Testing and Measuring Article List
Testing and measuring related articles
There are 21 articles related to testing and measuring.
Eddy current testing does more than detect product defects. When used with a proper monitoring system on a mill staffed by highly trained operators, it can help to optimize the mill’s efficiency. The first part of this two-part article covers eddy current system principles.
By: Richard L. Fisher - www.thefabricator.com, 7/17/09
Eddy current testing does more than detect product defects. When
used with a proper monitoring system on a mill staffed by highly
trained operators, it can help to optimize the mill’s efficiency. The
first part of this two-part article covers eddy current system principles
By: Richard L. Fisher - www.thefabricator.com, 6/10/09
Woolf Aircraft Products Inc. developed an inspection tool that can be
used to measure a leg length, as well as the actual throat of a weld.
Using these two known measurements, quality assurance personnel
then can determine the actual size and the convexity and concavity of
a specific fillet weld...
By: Joe Pavilanis - The FABRICATOR®, 5/19/09
It’s more important than ever for your employees—particularly entry-level personnel—to learn to use measurement tools to their full potential.
By: Scott Robinson and Mike Baczewski - The FABRICATOR®, 3/24/09
Although it is used primarily for forming, hydroforming equipment also is useful in many pressure testing applications (burst testing, pressure pulsation, leak testing, autofrettage).
By: Patrick J. Cain, Ph.D. - www.thefabricator.com, 3/11/08
If you are a copper tube producer, you know you need to use nondestructive testing methods, but you might not be aware of all the possibilities in how they are used. First off, should you check the material before or after it is processed? What are the advantages and disadvantages of each testing po...
By: Hari Muthuswami - www.thefabricator.com, 3/11/08
Determining whether a tube seam has a partial bond can be difficult with standard ultrasonic or eddy current techniques. However, multifrequency, probe-based eddy current equipment can detect poor-diffusion bonds in nonferrous materials. Using a penetrating field to reflect a signal off the planar s...
By: John Wallace - www.thefabricator.com, 12/11/07
Statistical process control (SPC) often is used to reduce the number of manufacturing defects. However, it has other uses also. It can serve to increase productivity and therefore improve a company’s profitability. Statistical tools and Pareto diagrams can help you to track manufacturing problems an...
By: Lewis Warren - www.thefabricator.com, 10/9/07
Conventional quality control in tube bending operations usually means detecting the number of links on a tube bending mandrel. When such a system detects that a mandrel link is missing, it shuts down the system so personnel can discard the last bent tube and replace the mandrel. Unfortunately, the b...
By: Paul Hogendoorn - www.thefabricator.com, 6/12/07
Manufacturing processes are prone to variances, resulting in manufactured products that do not conform to specifications. Dozens of types of electronic sensors and measurement systems are available that fabricators can use to verify that their products are not defective. Understanding what types of ...
By: Dave Bird - www.thefabricator.com, 3/13/07
Although eddy-current testing is king in the tube production industry, flux leakage is worth a look. Using a small test sample, equipment-maker InspecTech found that for 3.50-in. to 4.00-in. carbon steel tubing with wall thickness from 0.056 in. to 0.100 in., the flux leakage method found more defec...
By: A.C. Richardson, Murray Rose, and Rick Northrup - www.thefabricator.com, 7/11/06
Most manufacturers measure or test parts to verify that the parts meet quality standards. This conventional approach is time-consuming because testing adds steps and time to the production process. Furthermore, it is only as good as the sample size. A different approach to quality is to use a strain...
By: Paul Hogendoorn - www.thefabricator.com, 4/11/06
Portable technology is available that can help fabricators positively identify the alloys used in a weldment. This is especially critical when a fabricator is trying to match a filler alloy to a base alloy and application.
By: Tom Anderson and Jim Pasmore - www.thefabricator.com, 1/10/06
Fabricators and contractors always should check to be sure that the extent of nondestructive examination and the acceptance criteria required are understood clearly by all parties and documented in writing.
By: Walter J. Sperko, P.E. - www.thefabricator.com, 7/12/05
How do you check tube fabrications to ensure they meet quality standards? Do you ship parts without checking them and hope that the next time the phone rings it isn’t a prelude to a tirade from a disgruntled customer? Or do you check finished parts only to realize that your scrap rate is too high an...
By: Dave Petrack, Contributing Writer - www.thefabricator.com, 7/10/03
In May, automotive quality gurus J.D. Power & Associates released the results of its 2003 Initial Quality Study (IQS). As is the case every year, the winners will trumpet their scores while the losers will promise improvement. A closer look at the numbers, however, reveals some interesting observati...
By: Bernard Swiecki, Contributing Writer - www.thefabricator.com, 7/10/03
In-process sampling and between-process checks can prevent problems at the production stage. Although using an inspection jig can be costly, some testing approaches that are not as rigorous as using an inspection jig are: stacking and blocking a sheared batch in order to scan the batch for variation...
By: Gerald Davis, Contributing Writer - The FABRICATOR®, 7/25/02
Coordinate measuring machines have progressed since their inception in the 1970s.
By: Jean-Charles Granger, Contributing Writer - www.thefabricator.com, 7/11/02
The article discusses special considerations that must be kept in mind when hardness testing tube and pipe. Rockwell and Brinell are covered. Special considerations include surface finish, wall thickness, deflection, and internal supports.
By: Edward Tobolski, Contributing Writer - www.thefabricator.com, 11/15/01
This article discusses the capabilities and limitations of the two most common online tube monitoring test methods -- eddy current and ultrasonic. It discusses the types of flaws that each is capable of detecting, and shows photographs of three typical flaws -- one that was detected by ultrasonic, o...
By: Donald N. Bugden, Christopher McAllister, Kris Whitmore, Greg Maurer, and Larry Wells, Contributing Writers - www.thefabricator.com, 11/15/01
An eddy current flaw detection system is suitable for detecting discontinuities in tube and pipe during the production process. Understanding about eddy current system principles and this technology's capabilities and limiatations can help tube and pipe producers learn how to use such a system.
By: Brian Roberts, Contributing Writer - www.thefabricator.com, 9/17/01
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