Drill Breakage Elimination by Closed Loop Torque Control

Paper #:
  • 961635

Published:
  • 1996-05-01
Citation:
Furness, R., Rankin, J., and Muth, M., "Drill Breakage Elimination by Closed Loop Torque Control," SAE Technical Paper 961635, 1996, https://doi.org/10.4271/961635.
Pages:
9
Abstract:
This paper summarizes the design and implementation of a model-based torque control strategy for drilling. During drilling, the torque often increases due to difficulties with chip evacuation from the drill flutes. Excessive torque can accelerate tool wear or cause torsional failure of the drill.To avoid problems associated with excessive torque, closed loop torque control by manipulation of feedrate was pursued. This strategy simultaneously avoids tool breakage and decreases the cycle time compared to conventional practice. There can be significant cost benefits of torque control due to eliminating tool breakage. For example, reductions in scrap, rework, and machine maintenance costs may be realized.Dynamic models were developed for the drive system, sensing system, and drilling process. These models were subsequently used to design a model-based torque control strategy. Experimental results are presented for conventional twist drilling and form tool drilling applications. Implementation using a PC-based open architecture control platform integrated with a production drive system is described.
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
2016-04-30
Training / Education
2016-03-07
Training / Education
2007-03-01
Technical Paper / Journal Article
2010-10-19
Technical Paper / Journal Article
2010-10-19