TPT July 2008

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37 July 2008
Technology Update
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OES Inc, Canada, has established a new
patent (US7,333,906 B2) for quality analysis
using cumulative deviation determination,
which the company refers to as ‘CDA’.
The patent is used in the company’s line
of process variation monitoring systems for
quality assurance in manufacturing.
Various industries require objective quality
monitoring systems to ensure the quality
of manufacturing processes, the quality
of resultant products, or both. Signature
analysis is a well-established quality
assurance technique to ensure the process
is consistent and repeatable.
The signature, such as a force vs time
curve, is unique to each manufacturing
process. A reliably consistent process
results in a signature that is uniform and
stable cycle after cycle. Variance in the
process creates changes in the signature
that can be identified by analysis – changes
that can reflect quality problems with the
part being produced.
The newly patented CDA provides
improved process quality determination
that does not suffer from the inherent
drawbacks of other common signature
analysis methods, such as peak, area
and envelope. CDA determines both the
negative deviation and positive deviation
for a signature, or a critical portion of
it, to determine whether the signature
is within an acceptable range, allowing
OES process monitoring systems to more
accurately determine the stability of a
process cycle.
OES Inc develops and deploys ‘in-process
test and monitoring’ solutions for a wide range
of applications, including tube end-forming,
crimp forming, riveting, wire crimping, and
other pressing and forming applications.
OES, Inc – Canada
Fax: +1 519 652 3795
Email:
Website:
New patent for monitoring system manufacturer
High precision tubing
from India
Siddhi Engineers, India, is a manu-
facturer and exporter of aluminium
precision drawn tubes, rods and profiles.
With over 20 years’ experience, the
company is certified according to ISO
9001:2000.
The company can achieve product
tolerances as close as ±0.025mm in
OD and ID, by using specially designed
tools and materials, including a specially
developed alloy. This alloy is used to
make cryogenic fuel supply lines for the
Indian Space Research Organization
(ISRO). Rectangular tube in the length
of 60m in coil form is developed for the
same organisation.
The company also has expertise in the field
of precision pneumatic cylinder tubes. Its
product range of precision aluminium tube
caters to the vacuum cleaner, mopping
and gardening equipment segment. The
company can provide tolerances of H10
for sizes up to 40mm ID. Over 40mm ID,
the tolerance is H11.
Siddhi Engineers – India
Fax: +91 79 2754 5089
Email:
Website: