where expertise comes together - since 1996 -

The Largest Open Access Portal of Nondestructive Testing (NDT)

Conference Proceedings, Articles, News, Exhibition, Forum, Network and more

where expertise comes together
- since 1996 -

707 views
Technical Discussions
gulay litchfield
gulay litchfield
06:32 Jul-22-2003
Crack detection

Dear All
We are producing punches and dies for the tabletting machines (presses) in the pharmaceutical industry. Currently, we have been sourcing a crack detection equipment (for very fine cracks) for surface and sub-surface cracks.Eventhough we have liquid penetrant and optical measurement equipment in place, these methods are time consuming eventhough very effective. The ideal method should detect the cracks within less than a minute. Our products are made of steel and average material thickness is 16 mm. If you suggest any method or equipment which allows us perform the test in less than a minute and also precise, this would be highly appreciated.
Meanwhile, we tried Eddy current method and this did not give the expectant results, was not effective. For more information about our products, you can visit our web site.
www.iholland.co.uk
Could Magnetic Particle-Fluorescent, Ultrasonic test or Magnetic Barkhausen Noise method be the answer?
Thank you in advance





 
 Reply 
 
John O'Brien
Consultant, -
Chevron ETC , USA, Joined Jan 2000, 281

John O'Brien

Consultant, -
Chevron ETC ,
USA,
Joined Jan 2000
281
09:56 Jul-24-2003
Re: Crack detection
You might consider resistivity measurement. 4 point pin resisitivity measures very fine chganges in measurement resistance over a set pin spacing. Changes in resisitivity due to prescence of a crack are possible. Once set up properly it is less than a minute per spot. If you wish to pursue please contact me.


 
 Reply 
 
Jamie Gauthier
Jamie Gauthier
06:07 Jul-24-2003
Re: Crack detection
You might consider ACFM (Alternating Current Field Measurement). Very accurate and fast for measuring surface breaking cracks. Can work in high temperatures as well and gives a recordable image.


 
 Reply 
 
abdallah hassan
abdallah hassan
05:35 Aug-04-2003
Re: Crack detection
: You might consider resistivity measurement. 4 point pin resisitivity measures very fine chganges in measurement resistance over a set pin spacing. Changes in resisitivity due to prescence of a crack are possible. Once set up properly it is less than a minute per spot. If you wish to pursue please contact me.
.plz reply quickly either refuse or accept




 
 Reply 
 

Product Spotlight

HARDNESS TESTER TKM-459CE combi

TKM-459CE combi applies 2 methods of hardness control: UCI and Leeb. It provides high-accuracy tes
...
ting of metals and alloys as well as items of different sizes and configurations, their hardened layers and galvanic coatings. Device represents results in HB, HRC, HV and others. Shock-, dust- and water-proof housing with intuitive software make this gauge easy to use in all working conditions.
>

Extended Range Variable Wall® Piping Calibration Blocks for Longseam Inspection

This set of two blocks has been specially designed for situations where ultrasonic examination tak
...
es place circumferentially or “around the curve” for applications such as inspection of longseam welds in piping and vessels. Jointly designed by PH Tool and Holloway NDT, the blocks feature side-drilled hole reflectors positioned within novel compound-curves, each with multiple thickness steps. The unique design results in a light and compact form factor, with the largest block weighing just over 15 lbs and spanning just 16 ¾”. Coverage is provided for nominal pipe sizes from 6” to 10” in the small block and 12” to a whopping 56” in the large block. The compound OD curves and multiple wall thicknesses actually exceed ASME requirements, providing exceptional signal response and measurement accuracy. Properly managing beam divergence off the ID and stabilizing beam skew due to probe rocking is essential to maintaining a consistent calibration when inspecting lengthwise on curved surfaces.
>

Ultrasonic Squirter/Gantry System

TecScan’s NDT Ultrasonic Gantry Systems are industrial Squirter scanners designed for non-destru
...
ctive quality testing and raster scanning of large structures and parts. The Gantry Systems are usually composed of an Industrial Mechanical Scanner and a Control Room with System Workstation.
>

Magnetic X-Ray Pipeline Crawler 6''-60''

Suitable to work in 6''-60''diameter with speed of up to 18m/min, Max. moving diatance 5 kilometer
...
s and provide the efficient inspection of the pipeline.
>

Share...
We use technical and analytics cookies to ensure that we will give you the best experience of our website - More Info
Accept
top
this is debug window