Roll threader manufacturing process control for miniature fasteners

Amit Sethi; Henrique Reis

doi:10.1117/12.2558294

22 April 2020 Roll threader manufacturing process control for miniature fasteners

Amit Sethi, Henrique Reis

Proceedings Volume 11381, Health Monitoring of Structural and Biological Systems XIV; 113812A (2020) https://doi.org/10.1117/12.2558294
Event: SPIE Smart Structures + Nondestructive Evaluation, 2020, Online Only

Abstract

Threads on bolts and other fasteners are formed accomplished by rolling a smooth blank between a pair of linear dies at room temperature. The current method to control the transverse dimensions of the bolts during thread rolling fails to provide the needed tolerances for bolts with nominal dimensions of 1.0 mm or less. Towards addressing the shortcomings of the currently used roll threading manufacturing process, a mechanism to actively control the transverse dimension of the bolts is presented along with the corresponding control methodology. The proposed manufacturing process has been designed and, with its control methodology, has also been implemented on a roll threader. Comparison of bolts produced using the old system of dies and the newly developed methodology is presented using photographs taken using an optical microscope and a scanning electron microscope. These photographs clearly indicate the advantage of the newly implemented manufacturing process control system. With the new proposed system, the thread surface has clearly been improved and lateral tolerances less than five microns have been achieved on 1.0 mm diameter bolts.

Citation Download Citation

Amit Sethi and Henrique Reis "Roll threader manufacturing process control for miniature fasteners", Proc. SPIE 11381, Health Monitoring of Structural and Biological Systems XIV, 113812A (22 April 2020); https://doi.org/10.1117/12.2558294

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available