TPT July 2008

T echnology U pdate

New patent for monitoring system manufacturer

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 : oes@oes-inc.com Website : www.oes-qualityassurance.com

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. 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 : siddhiindia@siddhiindia.com Website : www.siddhiindia.com High precision tubing from India

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

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J uly 2008

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