Amada 1000ADP, Руководство по эксплуатации

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APPENDIX F: DEFINING THE OPTIMUM PROCESS
125ADP/300ADP/1000ADP DUAL PULSE RESISTANCE WELDING POWER SUPPLY
F-10 990-922
Common welding problems can often be identified in the basic set up of the force, energy, and time
welding profile shown above. These problems can lead to weld splash, inconsistency, and variation
(contact Amada Miyachi America for further information and support).
What are Screening DOE’S?
The purpose of a Screening DOE is to establish the impact that welding and process parameters have on
the quality of the weld. Quality measurement criteria should be selected based on the requirements of
the application. A Screening DOE will establish a relative quality measurement for the parameters
tested and the variation in the welded result. This is important, as identifying variation in process is
critical in establishing the best production settings. Typically, welded assemblies are assessed for
strength of joint and variation in strength.
A Screening DOE tests the high, low settings of a parameter, and will help establish the impact of a
parameter on the process. A Screening DOE is a tool that allows the user to establish the impact of a
particular parameter by carrying out the minimum number of experiments to gain the information. A
five-factor screening DOE can be accomplished in as few as 24 welds, with three welds completed for
each of 8 tests. By comparison, it would take 96 welds to test every combination. The DOE promotes
understanding of many variables in a single experiment and allows the user to interpret results, thus
narrowing the variables for the next level of statistical analysis. If many variables are still not
understood, multiple Screening DOE’s may be required. Amada Miyachi America provides a simple
Screening DOE tool that is run in
Excel ® and is sufficient for the majority of possible applications
(contact Amada Miyachi America for details). Sophisticated software is also available from other
vendors designed specifically for this purpose.
Poor Follow-up
(Sparks)
T
F
<< W
F
(Variation sparks)
No Squeeze
(Sparks)
Insufficient Force
(Sparks)
Impact Force
(Variation)
No Hold
(Variation)
Hold
Squeeze Heat