Advertisement

Member Login

Contact Us
telephone US +1 617 5008224
telephone EU +44 113 8152220
post/email Forum or Email
Like this Page?


Follow Us
Follow us on twitter. Follow us on LinkedIn. Follow us on YouTube.
Our Feeds
Repository RSS. Forum RSS. User Comment RSS. News RSS.

Who's Online

We have 13 guests and 40 members online

Total Downloads

236022


Enter Amount:


Helical Spring Design Guide.xls
 

This Excel calculation can be downloaded by ExcelCalcs subscribers.Please login or Subscribe.

Description:

Outline Calculation Procedure

1) Purpose of calculation
The design of a helical spring using mechanical design formula and material lookup tables.
Check dimensional limits, strength limits and buckling limits against the operational requirements.

2) Calculation Reference
http://www.roymech.co.uk/Useful_Tables/Springs/Springs_helical.html
http://www.thecartech.com/subjects/machine_elements_design/helical_springs.htm

3) Calculation Validation
Formulas checked using the XLC add-in

4) Calculation Units

5) Sketch

6) Main Input Parameters
Wire diameter
Spring mean diameter
Free length
Number of turns
% length on installation and operational max compression

7) Spring Ends
Number of inactive turns due to closed and ground ends
Effective number of turns
Length modifier
Inactive Length
Active Length
Pitch (unloaded).
Solid Length

8) Material Properties
Material Constant
Material index
Ultimate Tensile Stress
Torsional yield to tensile ultimate strength factor
Torsional yield stress
Conversion Factor from Mpa to selected system of units
Torsional yield stress converted to select system of units
Young's Modulus
Modulus of rigidity assuming a Poisson's ratio of 0.3

9) Spring Deflection Characteristics
Spring Index
Spring Rate
Force to close the spring

10) Spring Strength Characteristics

Wahl factor
Torsional Stress Rate
Force to yield spring
Spring extension to yield spring

11) Spring Buckling

Buckling critical compression length
Buckling force

12) Operational Limits
Installed Length
Installed force
Operating Length
Maximum working load

Calculation Reference
Machine Design
| Find on Amazon.com | Find on Amazon.co.uk | Find on Amazon.fr | Find on Amazon.de | Find on Amazon.ca |
Elements of Mechanical Design
| Find on Amazon.com | Find on Amazon.co.uk | Find on Amazon.fr | Find on Amazon.de | Find on Amazon.ca |
Design of Springs
| Find on Amazon.com | Find on Amazon.co.uk | Find on Amazon.fr | Find on Amazon.de | Find on Amazon.ca |

Version History
Subscribe to this topic and get notified by mail about new posts Favorite to this topic Discuss this item in the forum. Check the version history to see how this calculation has changed over time. Use the Subscribe button to receive an automatic email should this calculation be updated to a higher version. Use the Favourite button so you can easily find this calculation in the future.

Submitted On:
25 Nov 2011
Submitted By:
JohnDoyle[Admin]
File Date:
11 Feb 2011
File Version:
1.0
File Size:
569.00 Kb
File Type:
xls
XLC:
This download requires the XLC Add-in for Excel to be installed.
Downloads:
87
Rating:
stars/5.gifTotal Votes:3
HTML Link:
Copy code below to your web page to create link to this page:
HTML Window:
Copy code below to your web page to create a dynamic window to this download:
Like This?:
View the profile of the person who submitted this calculation and see all their other calculations hosted at ExcelCalcs.
Need Help?:
Use the comment feature below to raise any questions relating to this download. The question will be automatically emailed the author and all users subscribing to this comment thread.

Comments  

 
#1 trophy 2013-01-19 18:27
ty 4 help
 

Please sign in or register to add a comment.

Getting Started with ExcelWraps

The first thing to realise is that Wraps are accessed through your own ExcelWraps subdomain. You’ll become administrator of your subdomain and set up your users with at least one ‘role’. For example Unipart roles link to their competence management system (Production Operative 2,...

RIP Paperwork

ExcelWraps replaces all paper records at Unipart A quantum leap for the Hitachi 395 bogie overhaul as paper is superseded by Wraps. Now information is immediately available through the cloud and shared across Unipart, with its clients and its subcontractors. Bogie overhaul consists of 20 ...

Wabtec ExcelWraps Subdomain is Launched

We are delighted to launch wabtec.excelwraps.com from where Wabtec will be trialing wraps to monitor their rail overhaul business. Wabtec Rail undertakes the overhaul, refurbishment and conversion of all types of locomotive, passenger rolling stock and freight wagon bogies. Services includ...

Feedback from HitachiWraps Openday

HitachiWraps Open Day Feedback - We were very pleased to look through the positive comments in your feedback wraps. On Friday immediately after the event we were asked to present to the Unipart board so I guess it could not be more positive than this. A cross section of organisations across t...

HitachiWraps Open Day Wednesday March 12th 2014

  The high speed Class 395 fleet services are orchestrated from the Hitachi Rail depot in Ashford. The management team have a vision of replacing  clipboards with iPads so that the depot, their suppliers and clients can share live information. Hitachi engineers make spreadsheets wh...

Date to be Set for HitachiWraps Open Day

  The high speed Class 395 fleet services are orchestrated from the Hitachi Rail depot in Ashford. The management team have a vision of replacing  clipboards with iPads so that the depot, their suppliers and clients can share live information. Hitachi engineers make spreadsheets wh...

Introducing ExcelWraps

Just imagine if you could design your own App linked to a cloud data engine and working on any PC, tablet or smartphone……well now you can! You design your App in Excel. We make it device independent. We supercharge with our cloud data engine. You control access...

Training Courses For London Underground

"Thanks again for your excellent course this past week." "Thank you for the course last week, found it very interesting both from the perspective of a quick refresh, but also on how we can optimise the work we do." "Thanks for a very interesting and usef...

Try Excel 2013 for Free!

I am pleased to report that XLC Ribbon works with the 32bit and 64 bit versions of Excel 2013 obtained using the free Office 365 Home Premium Preview. Excel 2013 looks a little flat and dull compared to previous versions but I think this is the influence of the new Windows 8 'metro' look and f...