| |
>
About
us
>
Magnet-Products
>
Magnet
technology
>
Measuring
magnetism
>
Demagnetizers
> Degaussing
services
> Degaussing
technology
> Technical
cleanliness
ISO
16232/VDA19
> White Papers
> References
> Representations
wanted
> Magnetizers
>
News
& Media
> Sales
/ adresses
> Contact
>
Terms
of delivery and
Sales
(pdf)
>
Imprint
>
Job
vacancies
|
White
Papers on the topic of magnetism / demagnetizing / measuring residual
magnetism
Causes for residual magnetism on ferromagnetic workpieces
The magnetization of ferromagnetic workpieces is caused in practice from
diverse sources. Technical equipments, such as lifting magnets, crack
detection, magnetic chucks, magnetic tools, etc., are causing a magnetization
of the workpiece. Often residual magnetism on machined parts is detected
too late after difficulties encountered in the manufacturing process or
from customer complaints. Find more detailed information on residual magnetism
on ferromagnetic parts, as well as definitions and terminology in the
following white paper.
Causes
for residual magnetism in workpieces
Methods
for measuring ferromagnetic parts (measuring residual magnetism)
The magnetic stray fields on parts made of steel move typically between
0 and about 50 A/cm (~63 Gauss). In special cases even significantly higher
values may occur. Proper and reproducible measurement of residual magnetism
requires a basic knowledge and the use of appropriate measuring instrumentation.
In the following white paper, basic knowledge and appropriate instruments
to measure magnetism on ferromagnetic workpieces are described.
Measuring
residual magnetism on workpieces
Workplace safety and demagnetizers
Demagnetizers based on alternating field principle generate electromagnetic
fields in the low frequency range. A workplace must fulfill rules of safety
for areas where electromagnetic fields appear. Internationally, the recommendations
and guidelines of the ICNIRP define exposure limits for electromagnetic
fields. Concerning workplace safety, national norms apply, like for instance
BGV B11 in Germany. Find more information on the topic workplace safety
for operators of demagnetizers in the following white paper.
Workplace
safety for demagnetizer operators
|
