Searching for Spline Misalignment Reference 5

[Exacture]

Hello all,

I have lost my copy of "How To Evaluate the Effects of Spline Misalignments" by Earle Buckigham, published in Machinery September 1961 pages120-128.

Do any of you kind souls out there have a copy that you can share with me please? I feel like my left arm has been cut off.....

Thanks in advance!

 

[tbuelna]

My 22nd edition of Machinery's Handbook (p.926-927) has the relevant tables and equations from that wonderful article by Buckingham. If I remember correctly, the article gives some basic guidelines for designing involute splines that will experience misalignment. There are formulas for calculating tip and flank crown radius, flank contact stress, and recommendations for contact stress design limits for various materials and heat treatment. I work in the aerospace industry, and I can tell you that the recommendations published in this article by Buckingham are still used to design splines for high reliability, long life applications.

 

[gearcutter]

My version of Machinery's Handbook quotes D. W. Dudley's article 'When Splines Need Stress Control' - Product Engineering, Dec 23rd, 1957 as the source of the equations used for calculating 'Torque Capacity of Involute Splines'.
Is this what you're referring to tbuelna?

Ron Volmershausen
Brunkerville Engineering
Newcastle Australia

http://www.aussieweb.com.au/email.aspx?id=1194181

 

[Exacture]

My thanks to both tbuelna and gearcutter for your contribution.

It is the [highlight #FCE94F]actual reference[/highlight] paper I am seeking. The challenge for designing for misalignment is not of concern. That is relatively easy. The Machinery handbook does indeed provide a good reference to the tables and formulae we often encounter.

Regarding Dudley's paper; Earle Buckingham takes a very different approach from Dudley in that he addresses the problem of misalignment in mating splines directly. Buckingham thus looks to evaluate the effect of misalignment on each tooth and, by assessing the amount of deformation that occurs in adjacent teeth, is then able to precisely evaluate the exact loading on each individual spline tooth. This approach has demonstrated quite marked improvement in life when used (a factor of 10 and some!). The Dudley method is a good check stress approach for general cases but I have found Buckingham's approach goes the extra mile.

I have had to dig out my prior algorithm recently and was asked to demonstrate/validate the method. Without the reference, I am in a bit of a pickle and hence my reaching out to folks for help.

Thanks again.

 

[israelkk]

1. Darle W. Dudly, How to Design Involute Splines, in N.P. Chironis, editor,
Gear Design and Application. McGraw-Hill Book Co., New York, 1967 page 310.
2. Darle W. Dudly, “When Splines Need Stress Control”, in N.P. Chironis, editor,
Gear Design and Application. McGraw-Hill Book Co., New York, 1967 page 316.

 

[Exacture]

Thanks israelkk,

It is the Earle Buckingham post from Machinery magazine I need. I have all the Dudley papers.

 

[gearcutter]

............and here's an on-line calculator based on Dudley's article.

http://www.zakgear.com/External_Spline_IN.html

Ron Volmershausen
Brunkerville Engineering
Newcastle Australia

http://www.aussieweb.com.au/email.aspx?id=1194181

 

[Exacture]

Earle Buckingham please! NOT DUDLEY!!!

 

[israelkk]

In 22nd edition of Machinery's Handbook (p.926-927) I didn't find any mention of Buckingham. What is the name of the article?

 

[Exacture]

The article appeared as "How To Evaluate the Effects of Spline Misalignments" by Earle Buckigham, published in Machinery September 1961 pages120-128.

As in Machinery magazine and NOT Machinery Handbook... (easy misunderstanding)

 

[dinjin]

You might want to try this group. I think they have Elliot and Earle Buckingham's publications or should have. Note it is Buckingham and not Buckigham if you are trying to search for the article. If I can get to campus, I will check to see if they have the magazine in their technical reference section. I would hope that Ohio State University would have it as they do a lot of gear research funded by the government.

http://www.globalspec.com/reference/68714/203279/gear-consultants-buckingham-associates-inc

 

[dinjin]

The University of Akron has this periodical in the NE Regional Depository:

http://library.uakron.edu/record=b1853624~S24

The NE Regional Depository is located behind the medical college in Rootstown. You could call them and ask what would be the best way to request a copy of the article. Their phone number is 330-325-6400 or e-mail one of their staff members who are listed on the following Web page:

http://www.neomed.edu/library/north...egional-library-depository/depository-staff-1

I hope this helps.

 

[tbuelna]

My version of Machinery's Handbook quotes D. W. Dudley's article 'When Splines Need Stress Control' - Product Engineering, Dec 23rd, 1957 as the source of the equations used for calculating 'Torque Capacity of Involute Splines'....Is this what you're referring to tbuelna?

Yes, Dudley. Thanks for the correction gearcutter!

Regardless, the main point in this article that one should note when designing a reliable spline joint subject to misalignment is the extremely conservative design limits for simple flank contact stress. The recommended limit for high strength alloy steels is only about 5ksi.

It is also critical to consider the effect of tooth tip thinning when evaluating the external spline L/D and tip/face crowning. Even a slight amount of tip/face crowning can result in sharp-edged external tooth tips.

 

[724napier]

Any luck finding it Exacture? I would be interested in getting a copy if you end up finding it. I am planning on going to the library of congress this weekend. I will check while I am there.

 

[724napier]

I got a copy of the article from my library if anyone is still looking for it.

 

[gearcutter]

I got a copy of the article from my library if anyone is still looking for it.

Can you upload it to somewhere?

Ron Volmershausen
Brunkerville Engineering
Newcastle Australia

http://www.aussieweb.com.au/email.aspx?id=1194181

 

[Exacture]

Hello friends!

@724Napier, no I had no luck obtaining this reference. Ironically, my need has refreshed itself on account of involvement with a new initiative this week. Involute splines keep cropping up wherever I tread. I am beginning to think they are one of the most misunderstood mechanisms in the history of engineering. I would certainly appreciate being able to get a copy from you or anyone out there.

Thanks for everyone's interest on this matter.

Best regards.

 

[724napier]

@gearcutter & @Exacture, is there a way to private message on the forum? If not, do you guys have an email I can contact you at?

 

[724napier]

Sorry, it is against the rules of the forum to ask for email addresses. I have the articles and want to send them to you guys, but I don't want to post the link on the forum since it is indexed by Google.

 

[Exacture]

@724Napier

I think you can work out how to reach me. Check my profile out.

BTW, I just joined the LinkedIn group for Eng-Tips.

Thanks again!

Alan

Alan Powell
Aerospace Consultant
Exacture Ltd, UK

http://www.exacture.com