What's New in Spring Calculator Professional

Major Upgrades to Spring Calculator Professional

The advances provided by IST’s involvement in the European Commission funded Techspring project (see www.spring-tech.eu) are significant and provide a multitude of features useful to our Spring Design Software customers. The next release of our world-leading spring design software will incorporate the benefits of this project alongside a major upgrade to our materials database.

New Features in Spring Calculator Professional

Fatigue and relaxation data has been added to the majority of the materials in our database, ensuring that designers can verify their springs whichever material specifications their customers request.

Compression Spring changes include:

• More appropriate stress limits are utilised on most materials, eliminating known errors in certain spring design standards,
• The effect of pre-stressing is shown more accurately on the Goodman diagram,
• “As-coiled” length is predicted for pre-stressed designs,
• Dynamic effects are calculated in various ways:
1. The maximum safe speed is shown
2. The natural frequency for axial, lateral and torsional directions are calculated
3. The Goodman diagram shows the effect of dynamic stresses on predicted life (see above right)
• The shot-peening conditions used are provided for guidance.
• EN 15800 drawing available (see right)

Extension spring changes include:

• End loop fatigue data is given for carbon and stainless steel materials
• Extension springs with coned-down ends (specified loop diameter) have a rate calculation that compensates for this
• The drawings also show a more realistic shape

Torsion spring changes include:

• Improved pre-stressed design limits
• Improved torsion spring definition system with and without a mandrel,
• Fatigue guidance for various leg types.