Page 41 - MetalForming August 2011
P. 41
The Science of Forming
Test tool
Lubrication Sheetmetal
When testing one of three components, the other two must remain constant.
Therefore, one must arrange a random matrix of all of the lubricant samples being tested that day, allowing each dif- ferent lubricant to be evaluated for all changing conditions. Have more samples to test the next day? Technically, COF val- ues from the second day cannot be mixed with the values obtained during the first day of testing, although some measure of comparison can be achieved if several reference samples are measured each day. Even here, the question arises whether storage of those samples have changed them.
Lessons learned: First assess the required accuracy of the test results, and then design the test procedures to pro- vide that level of accuracy. Comparison of COF values can be made only among samples tested in one batch at one time using random sample sequencing. Comparing the absolute values of your COF with another published set of COF values can prove meaningless. MF
First Annual
Innovative Industry Leader
Economical Customer Driven
Die Design Software
Logopress3 Die Design Software For SolidWorks
Die Design & Strip Layout , Round Draw Flattening & Unbending, BLANK (FEA) Punch Assistant & Intelligent Animation Powerful Tool Structure Assistant
Publications * Videos * Testimonials * Knowledgebase Check out our website to learn why so many companies have switched to Logopress3 from other 3D Die Design software www.accuratediedesign.com
www.logopress3.com / www.accuratediedesign.com Contact: Accurate Die Design, Inc. / 262-938-9316
logopress3@accuratediedesign.com Industry Experts Providing 3D Software, Training and Support
Women in
Manufacturing Symposium
Sharing Worldclass Management Techniques and Best Practices
October 25-26, 2011 | Cleveland, OH
This event will provide women in the manufacturing industry a forum and venue for sharing leadership techniques, resulting in strong networking and support opportunities for attendees.
For more information go to: www.womeninmanufacturing.org
www.metalformingmagazine.com MetalForming/August 2011 39
