Once-Up / One-Pass Drilling Process, C-17 Cargo Ramp Skin Assembly

Paper #:
  • 1999-01-3426

Published:
  • 1999-10-06
Citation:
Green, C., "Once-Up / One-Pass Drilling Process, C-17 Cargo Ramp Skin Assembly," SAE Technical Paper 1999-01-3426, 1999, https://doi.org/10.4271/1999-01-3426.
Pages:
8
Abstract:
As an ongoing effort to achieve affordability goals and obtain additional aircraft orders, the C-17 program has developed and implemented a once-up / one-pass drilling process for the C-17 Cargo Ramp center skin to frame assembly operation. Traditionally, the aircraft assembly build process consists of the following steps: part assembly, multi-pass hole drilling, part disassembly, hole deburring, fay sealing, part re-assembly, and fastener installation. The once-up / one-pass drilling process reduces this sequence to: fay sealing, part assembly, one-pass hole drilling, and fastener installation. The new process will provide a significant recurring cost savings and cycle time reduction to the program by eliminating the labor and time-intensive efforts of disassembling, deburring, and re-assembling a skin panel 230 inches by 80 inches in size. This once-up / one-pass process has been achieved through a combination of assembly sequence changes, clamping method development, and drill motor / cutter system design.
Access
Now
SAE MOBILUS Subscriber? You may already have access.
Buy
Select
Price
List
Download
$27.00
Mail
$27.00
Members save up to 40% off list price.
Share
HTML for Linking to Page
Page URL

Related Items

Training / Education
2017-10-27
Technical Paper / Journal Article
2004-09-21
Training / Education
2018-06-27
Technical Paper / Journal Article
2004-09-21
Standard
2016-02-09
Technical Paper / Journal Article
2004-09-21
Technical Paper / Journal Article
2004-09-21