Accession Number : AD0600196

Title :   FIXTURE (F-1, F-2, F-3).

Descriptive Note : NOPF Standard Time Formula.

Corporate Author : NAVAL ORDNANCE PLANT FOREST PARK ILL

Report Date : MAY 1956

Pagination or Media Count : 80

Abstract : The time values developed in this formula are based on the study of approximately fifteen humdred drill jigs normally used on the sensitive drill press. Due to the wide variety of jigs encountered, an individual formula was needed to develop accurate operating times for all jigs. After a preliminary study, it was obvious that the greater percent of the jigs could be classified into four basic types: (1) Box Jigs, (2) Sandwich Jigs, (3) Pump Jigs, and (4) Plate Jigs. In all four types, a wide variety of clamping devices are used, such as leaf gates, leaf gates with one-quarter turn thumb screws, Allen screws, etc. In one jig alone, several different devices might be used. Individual MTM studies covering the operation of each of the different types of clamping devices were made. These studies were taken by observing the many different locations of the clamping devices used and establishing average time values. Values given in the table of elements are total values. They include both the insertion and removal of parts, tightening and loosening of screws, etc. (Author)

Descriptors :   (*JIGS, DRILLS), (*TIME STUDIES, JIGS), (*MACHINE SHOP PRACTICE, ORDNANCE), OPERATION, SPECIFICATIONS, JOB ANALYSIS, MACHINE TOOLS, CLAMPS

Distribution Statement : APPROVED FOR PUBLIC RELEASE