Magnetic Safety Base for Automated Riveting and Bolting

Paper #:
  • 2016-01-2087

Published:
  • 2016-09-27
DOI:
  • 10.4271/2016-01-2087
Citation:
O'Folan, H. and Zieve, P., "Magnetic Safety Base for Automated Riveting and Bolting," SAE Technical Paper 2016-01-2087, 2016, doi:10.4271/2016-01-2087.
Pages:
5
Abstract:
There is an ever-present risk for the lower ram on a riveting machine to suffer a damaging collision with aircraft parts during automated fastening processes. The risk intensifies when part frame geometry is complex and fastener locations are close to part features. The lower anvil must be led through an obstructive environment, and there is need for crash protection during side-to-side and lowering motion. An additional requirement is stripping bolt collars using the downward motion of the lower ram, which can require as much as 2500 pounds of pulling force. The retention force on the lower anvil would therefore need to be in excess of 2500 pounds. To accomplish this a CNC controlled electromagnetic interface was developed, capable of pulling with 0-3400 pounds. This electromagnetic safety base releases when impact occurs from the sides or during downward motion (5 sided crash protection), and it retains all riveting and bolting functionality.
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