Design Considerations for
Choosing Between Machined
and Wire Wound Springs
 This

webinar will be available afterwards at
designworldonline.com & email

 Q&A

at the end of the presentation

 Ha...
Moderator

Presenter

Leslie Langnau

Gary Boehm

Design World

Helical
Choosing Between
Machined and Wire Wound
Springs

© 2012 Helical Products Co, Inc.

5
A Webinar based upon the Helical White Paper

Wire Springs versus Machined Springs,
A Comparison
Authored by

Gary L Boehm...




Founded in 1958
Invented Beam
Style Couplings

© 2012 Helical Products Co, Inc.

7
Springs

© 2012 Helical Products Co, Inc.

8
Springs
Wire-Wound
Springs

© 2012 Helical Products Co, Inc.

9
Springs
Wire-Wound
Springs

Machined
Springs

© 2012 Helical Products Co, Inc.

10
• Wire Springs existed before the
Industrial Revolution
• First Machined Springs in 1960’s
• Now- New designs created dail...
Wire Wound

Machined

Springs

Springs

yes

yes

1%

maybe

yes

0.1%

no

maybe

10%
Precision

© 2012 Helical Products ...
Wire Wound Springs are typically made from medium and high strength steels, nickel alloys, titanium and stainless
steels t...
A long, torsion Machined
Spring using a dime for size
comparison.
Wire Springs can be larger.
A small, compression
Machine...
Some of the many
Machined Spring
Attachments
available for
Compression and
Extension
Springs
© 2012 Helical Products Co, I...
© 2012 Helical Products Co, Inc.

16
Flexure
Configurations
for Compression
and Extension
Springs that
resist rotation
given axial
deformation

© 2012 Helical ...
Some of the many
Machined Spring
Attachments
available for
Torsion Springs

© 2012 Helical Products Co, Inc.

18
Multiple Start
Flexures

© 2012 Helical Products Co, Inc.

19
Triple
Available only in
Machined Springs

Single

Double

Available in both
Wire
and
Machined Springs

Available only in
...
Single Start

Multiple Start

© 2012 Helical Products Co, Inc.

21
© 2012 Helical Products Co, Inc.

22




Wire and Machined Springs are constructed of uniformly
shaped elastic, structural elements.
Wire and Machined Spring...
Helix Angle

© 2012 Helical Products Co, Inc.

24




When compressed, the helix angle is reduced and hence the
elastic rate is reduced.
When extended, the helix angle is...


Compressed, Wire Springs with closed ends tend to reduce the
effective coil length as the coil contact increases. Hence...


Compressed, Machined Springs do not have end coil contact, and
hence, exhibit no rate change for this reason.

© 2012 H...




Wire springs are plastically formed to create the helical shape
and end features. This activity creates residual str...
Multiple Started Machined Springs are
proving to be a preferred and effective
component in the creation of spring-mass
res...
© 2012 Helical Products Co, Inc.

30
Design World

Leslie Langnau
llangnau@wtwhmedia.com
Phone: 440.234.4531
Twitter: @DW_RapidMfg

Helical

Gary Boehm
enginee...


This webinar will be available at designworldonline.com
& email



Tweet with hashtag #DWwebinar



Connect with
 Tw...
Design Considerations for Choosing Between Machined and Wire Wound Springs
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Design Considerations for Choosing Between Machined and Wire Wound Springs

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Machined springs offer several benefits not available with wire wound springs, such as integrating multiple features into one piece. Gary Boehm will cover the differences between machined and wire wound springs, features and benefits, as well as application tips, including tips for using them in torsion and wrap spring clutch applications.
You will learn the features and capabilities of machined springs, when to apply them, and how they can help solve many of your design challenges.
Viewers will learn:
– The differences between machined and wire wound springs
– Application tips, including tips for using them in torsion and wrap spring clutch applications
All registrants will also receive a free whitepaper when you register for the webinar.

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Design Considerations for Choosing Between Machined and Wire Wound Springs

  1. 1. Design Considerations for Choosing Between Machined and Wire Wound Springs
  2. 2.  This webinar will be available afterwards at designworldonline.com & email  Q&A at the end of the presentation  Hashtag for this webinar: #DWwebinar
  3. 3. Moderator Presenter Leslie Langnau Gary Boehm Design World Helical
  4. 4. Choosing Between Machined and Wire Wound Springs © 2012 Helical Products Co, Inc. 5
  5. 5. A Webinar based upon the Helical White Paper Wire Springs versus Machined Springs, A Comparison Authored by Gary L Boehm PE Helical Products Co Inc, Santa Maria, CA © 2012 Helical Products Co, Inc. 6
  6. 6.   Founded in 1958 Invented Beam Style Couplings © 2012 Helical Products Co, Inc. 7
  7. 7. Springs © 2012 Helical Products Co, Inc. 8
  8. 8. Springs Wire-Wound Springs © 2012 Helical Products Co, Inc. 9
  9. 9. Springs Wire-Wound Springs Machined Springs © 2012 Helical Products Co, Inc. 10
  10. 10. • Wire Springs existed before the Industrial Revolution • First Machined Springs in 1960’s • Now- New designs created daily • Both are manufactured with CNC controlled machines © 2012 Helical Products Co, Inc. 11
  11. 11. Wire Wound Machined Springs Springs yes yes 1% maybe yes 0.1% no maybe 10% Precision © 2012 Helical Products Co, Inc. 12
  12. 12. Wire Wound Springs are typically made from medium and high strength steels, nickel alloys, titanium and stainless steels that gain their strength predominately from heat treating and cold reduction. CRES (Corrosion Resistant Steels), moderate to high strength a 17-4PH per AMS5643 b 15-5PH per AMS5659 c CC455 per AMS5617 Very high strength steel a C300 per AMS6514 Other materials of interest a 7075-T6 Aluminum (high strength) b 7068-T6511 Aluminum (very high strength) c 38644 Beta C Titanium (very high strength and corrosion resistant) d Delrin 100 (machinable plastic) e Ultem 2300 (machinable plastic) © 2012 Helical Products Co, Inc. 13
  13. 13. A long, torsion Machined Spring using a dime for size comparison. Wire Springs can be larger. A small, compression Machined Spring. Wire Springs can be smaller. © 2012 Helical Products Co, Inc. 14
  14. 14. Some of the many Machined Spring Attachments available for Compression and Extension Springs © 2012 Helical Products Co, Inc. 15
  15. 15. © 2012 Helical Products Co, Inc. 16
  16. 16. Flexure Configurations for Compression and Extension Springs that resist rotation given axial deformation © 2012 Helical Products Co, Inc. 17
  17. 17. Some of the many Machined Spring Attachments available for Torsion Springs © 2012 Helical Products Co, Inc. 18
  18. 18. Multiple Start Flexures © 2012 Helical Products Co, Inc. 19
  19. 19. Triple Available only in Machined Springs Single Double Available in both Wire and Machined Springs Available only in Machined Springs © 2012 Helical Products Co, Inc. 20
  20. 20. Single Start Multiple Start © 2012 Helical Products Co, Inc. 21
  21. 21. © 2012 Helical Products Co, Inc. 22
  22. 22.   Wire and Machined Springs are constructed of uniformly shaped elastic, structural elements. Wire and Machined Springs are influenced by a change in “helix angle” when compressed or extended. © 2012 Helical Products Co, Inc. 23
  23. 23. Helix Angle © 2012 Helical Products Co, Inc. 24
  24. 24.   When compressed, the helix angle is reduced and hence the elastic rate is reduced. When extended, the helix angle is increased and hence the elastic rate is increased. © 2012 Helical Products Co, Inc. 25
  25. 25.  Compressed, Wire Springs with closed ends tend to reduce the effective coil length as the coil contact increases. Hence, the elastic rate is increased. © 2012 Helical Products Co, Inc. 26
  26. 26.  Compressed, Machined Springs do not have end coil contact, and hence, exhibit no rate change for this reason. © 2012 Helical Products Co, Inc. 27
  27. 27.   Wire springs are plastically formed to create the helical shape and end features. This activity creates residual stress that can be partially removed by stress annealing. Machined Springs blanks are fully annealed, and hence contain no residual stress to influence linearity. © 2012 Helical Products Co, Inc. 28
  28. 28. Multiple Started Machined Springs are proving to be a preferred and effective component in the creation of spring-mass resonant systems. © 2012 Helical Products Co, Inc. 29
  29. 29. © 2012 Helical Products Co, Inc. 30
  30. 30. Design World Leslie Langnau llangnau@wtwhmedia.com Phone: 440.234.4531 Twitter: @DW_RapidMfg Helical Gary Boehm engineering@heli-cal.com; Subject: Webinar Twitter: @HelicalProducts
  31. 31.  This webinar will be available at designworldonline.com & email  Tweet with hashtag #DWwebinar  Connect with  Twitter: @DesignWorld  Facebook: facebook.com/engineeringexchange  LinkedIn: Design World Group  YouTube: youtube.com/designworldvideo  Discuss this on EngineeringExchange.com

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