IST INDIA
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Tel: +91 33 3294 1428 Fax: +91 33 2407 9802
Mobile: 9831019756 Email: amitban@cal2.vsnl.net.in

Contact: Amit Banerjee


 

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Failure & Prevention

Springs are almost always the highest stressed component in any manufactured product and as such are more likely to fail than any other component. Springs are extremely reliable, but the consequences of failure are often very expensive in terms of down-time, repair and inconvenience.

It is a common supposition that most springs fail due to poor design, however it is estimated that half of all springs that fail were appropriately designed, but had either been made from sub-standard raw material, badly manufactured or had been mis-used. Others may fail because something that should have been considered at the design stage had been overlooked.

This course draws upon our considerable experience of examining springs that have failed during manufacture, testing or use and has been designed to be of benefit to anyone involved in the design or manufacture of all spring types by highlighting possible means by which springs may fail and giving advice on how to significantly reduce the chance of failure.

The course is suitable for anyone new to spring technology, as well as those who have considerable experience. Combining lectures, practical demonstrations and case histories to provide a complete picture of reasons for spring failure and possible options for preventing future occurrences.

It is possible on the day that one or two delegates will be able to carry out a failure investigation. Naturally it will not be possible to keep the results confidential from the other delegates, but the diagnosis and advice for prevention of further failures will be available during the day at no extra charge.

 

Introduction

Lecture – How Could Springs Fail?
Fracture
Loss of performance
Example

Lecture – Causes of Spring Failure
Introduction and laboratory demonstration
Overstressing – safe static design stresses
Fatigue failure mechanisms – Goodman diagrams
Setting down – relaxation data
Corrosion – general and pitting
Embrittlement – hydrogen and liquid metal
Unsatisfactory springmaking
Misuse
Lecture – Spring Failure Analysis
Visual examination
Optical metallography
Scanning electron microscopy

Demonstration of Failure Analysis Techniques

Lecture – The Prevention of Spring Failure
Optimum material selection
Design safety
Correct spring manufacture
Correct spring use
FMEA

Case Histories
Illustrations of diagnosis and advice given to reduce failure recurrence rate