Accession Number : ADA210154


Title :   Roller Straightening of Track Pins - A Market Survey


Descriptive Note : Final rept. Oct 1987-Apr 1989,


Corporate Author : ARMY TANK-AUTOMOTIVE COMMAND WARREN MI


Personal Author(s) : Catalano, Sam B


Full Text : http://www.dtic.mil/dtic/tr/fulltext/u2/a210154.pdf


Report Date : Apr 1989


Pagination or Media Count : 69


Abstract : Track pins used in Army tracked vehicles undergo heat treatment during manufacturing to induce appropriate hardness. In the process, the pins wrap and need straightening before further processing.The problem is to straighten the pins without decreasing pin fatigue life or strength. Presently, straightening is done by chisel straightening, accomplished by supporting the pin at the ends and bending it in the middle until the outer fibers yield and the pin is straight enough to continue processing. Recently this operation has been automated, but the problem remains. Chisel straightening leaves pins with selected areas of yielded/plastically deformed outer fibers which can act as stress risers and reduce pin fatigue life, strength and reliability. These drawbacks would not occur if straightening were done via roller straightening. A market survey was conducted to find existing firms interested and able to implement roller straightening of track pins used in the Army M1 tank into an existing manufacturing plant. Questionnaires were sent to those who responded to a call for potential contractors placed in the Commerce Business Daily Journal. Only four respondents returned completed questionnaires. Of the four, only two truly addressed roller straightening; the others answered in terms of chisel straightening.


Descriptors :   *DEFORMATION , *TRACKED VEHICLES , *PINS , FIBERS , MARKET RESEARCH , FATIGUE LIFE , MILITARY VEHICLES , HEAT TREATMENT , RELIABILITY , ARMY EQUIPMENT , YIELD , EXTERNAL , QUESTIONNAIRES , WINDING


Subject Categories : Mfg & Industrial Eng & Control of Product Sys


Distribution Statement : APPROVED FOR PUBLIC RELEASE