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Compression, Extension & Torsion Spring Design plus Failure & Prevention |
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Compression Spring Design
Extension & Torsion Spring Design
Failure & Prevention
2012 COURSE DATES:
22nd, 23rd & 24th May
20th, 21st & 22nd November
DAY ONE COMPRESSION - DAY TWO EXTENSION & TORSION DESIGN
Whether you work in manufacturing, or you design springs for your company, this course will provide you with information to identify the right spring design for the right product. Providing a programme that looks at best practice and theory for design of Compression, Extension, Torsion and spiral spring types. Best practise design methods will be described upon EN13906-1, 2 and 3 with modification to these design methods based upon IST research results.
DAY THREE FAILURE & PREVENTION
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 was overlooked at the design stage. Drawing upon our considerable experience of examining springs from all parts of the world that have failed during manufacture, testing or use, this course has been designed to be of benefit to anyone involved in the design or manufacture of all spring types. It highlights possible means by which springs may fail and gives advice on how to significantly reduce the chance of failure, by combining lectures, practical demonstrations and case histories to provide a complete picture or reasons for spring failure and possible options for preventing future occurrences.
COSTS (Excluding VAT):
ONE DAY £225.00 Member / £300.00 Non Member
TWO DAYS £400.00 Member / £525.00 Non Member
ALL THREE DAYS £550.00 Member / £700.00 Non Member
COURSE SYLLABUS
DAY ONE - COMPRESSION SPRING DESIGN - 9.00 - 17.00
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Standards
Spring end type
Number of coils relationships
Solid length
Design formulae for spring rate
Theoretical vs actual load/deflection line |
Residual range
Comparison of Theory - vs - Measurement
Design formula for stress
Curvature correction factor
Allowable design stresses and prestressing
Use of Spring Calculator Professional |
DAY TWO - EXTENSION & TORSION SPRING DESIGN - 9.00 - 17.00
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Extension
Initial tension
Load deflection of characteristics
Hook Types
Standards
Design formulae for rate & stress
Effect of LTHT
Use of Spring Calculator Professional |
Torsion
Leg forms
Method of operation
Dimensional changes
Specification of angular relationship of legs
Design formulae for rate & stress
Allowable stresses
Use of Spring Calculator Professional |
DAY THREE - FAILURE & PREVENTION - 9.00 - 16.00
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Introduction
How Could Springs Fail?
Fracture
Loss of performance
Example
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 |
Spring Failure Analysis
Visual examination
Optical metallography
Scanning electron microscopy
Demonstration of Failure Analysis Techniques
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 |
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