Elsmar Cove Forum Header Graphic The Elsmar Cove Wiki More Free Files The Elsmar Cove Forums Discussion Thread Index Post Attachments Listing Failure Modes Services and Solutions to Problems Elsmar cove Forums Main Page Elsmar Cove Home Page
Miner's MSA (Measurement Systems Analysis) Blog 
Go Back   The Elsmar Cove Forum > Common Quality Assurance Processes and Tools > FMEA and Control Plans
Forum Username

Wooden Line

Ballpoint Pen DFMEA (Design FMEA)

Wooden Line
Search the Elsmar Cove
Search Elsmar
Monitor the Elsmar Forum
Follow Marc & Elsmar
Elsmar Cove Forum RSS Feed  Marc Smith's Google+ Page  Marc Smith's Linked In Page   Marc Smith's Elsmar Cove YouTube Page  Marc Smith's Facebook Page  Elsmar Cove Twitter Feed
Elsmar Cove Groups
Elsmar Cove Google+ Group  Elsmar Cove LinkedIn Group  Elsmar Cove Facebook Group
Donate and $ Contributor Forum Access
Courtesy Quick Links

Links that Elsmar Cove visitors will find useful in your quest for knowledge:

Howard's
International Quality Services
Marcelo Antunes'
SQR Consulting
Bob Doering's
Correct SPC - Precision Machining

NIST's Engineering Statistics Handbook
IRCA - International Register of Certified Auditors
SAE - Society of Automotive Engineers
Quality Digest Portal
IEST - Institute of Environmental Sciences and Technology
ASQ - American Society for Quality
Reply
 
Thread Tools Search this Thread Rate Thread Content Display Modes
  #1  
Old 26th May 2005, 10:36 AM
TownDawg's Avatar
TownDawg

 
 
Posts: 218
I Say... Ballpoint Pen DFMEA (Design FMEA)

gRrrrrr. One of my assignments in my new job is to create a good DFMEA for a typical ball point pen... the thought being that it will be a good mental exercise so that as I get future applications, I have exercized my mind, and can use the same thought processes to create future DFMEA's.

Grrrr.. I have a headache. do any of you have a good ballpoint pen DFMEA I can study as an example to help me get all this straight in my mind?

(I've discovered I'm really good at PFMEAs.. and having a hard time transferring all that knowledge to DFMEAs.. )

Thanks in advance. The cove is the BEST of the best.
Attached Files: 1. Scan for viruses before using, 2. Please report any 'bad' files by Reporting this post, 3. Use at your Own Risk.
File Type: xls Chris-Fox - DFMEA - Excersize.xls (38.5 KB, 1521 views)

Sponsored Links
  #2  
Old 26th May 2005, 05:21 PM
Marc's Avatar
Marc

 
 
Posts: 24,322
I looked over what you posted and it looks OK to me - It addresses design issues as it should. Sorry I don't have an existing pen design FMEA, but I will say this is interesting.
Sponsored Links

  #3  
Old 27th May 2005, 10:06 AM
TownDawg's Avatar
TownDawg

 
 
Posts: 218
Revised version..

I've made several revisions.. hopefully even improvements..
Attached Files: 1. Scan for viruses before using, 2. Please report any 'bad' files by Reporting this post, 3. Use at your Own Risk.
File Type: xls Chris-Fox - DFMEA - Excersize.xls (1.81 MB, 1110 views)
  #4  
Old 27th May 2005, 10:54 AM
Jim Wynne's Avatar
Jim Wynne

 
 
Posts: 14,077
Quote:
In Reply to Parent Post by TownDawg

I've made several revisions.. hopefully even improvements..
I think what you've got is OK, but I'm not sure about your approach (using an existing design). The other thing I noticed is that there's no consideration given to appearance. A lot of pens are sold based on cosmetics alone, so you would have to make sure that cosmetic concerns are in concert with mechanical considerations.
  #5  
Old 27th May 2005, 12:56 PM
AllanJ

 
 
Posts: 311
Unless I am not getting the whole xls in the download or I am misreading what has been done, I do not think you have considered some key aspects of the design. The ball and its function and characteristics including its hardness, smoothness, material properties (compatibility with the ink), dimensional requirements and interface with its housing; the fit of the ball into its housing when it is not in use and when it is in use; the "spring" and its load/compression characteristics, its material and compatibility with the ink; the fit of the ball housing into the sleeve.

Since it is a ball point pen, I did try to search the download I got for details about the ball but did not seem to find any.

Supplemental note: Subsequently downloaded later edited xls which does address some of my points. Except, I am not sure whether the pen would use a stylus or a ball. I do not profess to be intimately familiar with modern ball point design but hope all this is of some help.

Last edited by AllanJ; 27th May 2005 at 01:13 PM. Reason: Added supplemental note
  #6  
Old 1st June 2005, 08:21 AM
TownDawg's Avatar
TownDawg

 
 
Posts: 218
Thanks for all your comments. Good information! As for stylus versus ball.. you are right -- even ballpoint have differences, and even though my original DFMEA was trying to address a "ballpoint" my revised version was actually one of those new designs.

Have to run. Work calls. Thanks again!
  #7  
Old 1st June 2005, 08:58 AM
YKT

 
 
Posts: 72
why don't just use the boundary diagram to 'look' at the component of your pen..
  #8  
Old 16th January 2006, 04:33 AM
chalapathi

 
 
Posts: 31
Quote:
In Reply to Parent Post by TownDawg

gRrrrrr. One of my assignments in my new job is to create a good DFMEA for a typical ball point pen... the thought being that it will be a good mental exercise so that as I get future applications, I have exercized my mind, and can use the same thought processes to create future DFMEA's.

Grrrr.. I have a headache. do any of you have a good ballpoint pen DFMEA I can study as an example to help me get all this straight in my mind?

(I've discovered I'm really good at PFMEAs.. and having a hard time transferring all that knowledge to DFMEAs.. )

Thanks in advance. The cove is the BEST of the best.
It is good attempt. Consider the following points:

In the DFMEA, you need to assume that a customer is actualy using this product what can go wrong. Even missuse of the product is also can be considered as a failure. Some one puts pen in mouth (the plastic may be toxic material).
In your case, you are coming from functions, which is very good. You can also consider some un-intended functions (ink leak is one example of un-intended function).
Attached Files: 1. Scan for viruses before using, 2. Please report any 'bad' files by Reporting this post, 3. Use at your Own Risk.
File Type: xls Chris-Fox - DFMEA - Excersize.xls (1.80 MB, 741 views)
Reply

Lower Navigation Bar
Go Back   The Elsmar Cove Forum > Common Quality Assurance Processes and Tools > FMEA and Control Plans

Do you find this discussion thread helpful and informational?


Bookmarks


Visitors Currently Viewing this Thread: 1 (0 Registered Visitors (Members) and 1 Unregistered Guest Visitors)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Forum Search
Display Modes Rate Thread Content
Rate Thread Content:

Forum Posting Settings
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Similar Discussion Threads
Discussion Thread Title Thread Starter Forum Replies Last Post or Poll Vote
How to Calculate RPN in Design FMEA (DFMEA) vs. Process FMEA (PFMEA) nsraj FMEA and Control Plans 9 14th November 2012 01:30 AM
DFMEA (Design FMEA) - We already have a PFMEA (Process FMEA) tusmobil FMEA and Control Plans 5 10th December 2009 08:37 AM
DFMEA (Design FMEA) and PFMEA (Process FMEA) - Who should lead? Carrie11 FMEA and Control Plans 14 11th August 2009 09:00 AM
Can a DFMEA (Design FMEA) effectively analyse design modifications? rlaurenti FMEA and Control Plans 12 21st March 2009 05:32 PM
DFMEA (Design FMEA) for Trailers or any heavy vehicle design mukesh.sharma657 Design and Development of Products and Processes 1 28th May 2008 11:06 AM



The time now is 06:15 AM. All times are GMT -4.
Your time zone can be changed in your UserCP --> Options.


   


Marc Timothy Smith - Elsmar.com
8466 LeSourdsville-West Chester Road, Olde West Chester, Ohio 45069-1929
513 341-6272
NOTE: This forum uses "cookies".