本文主要就《中小型自由锻件工时定额的制定》(《锻压机械》1985№ 3,以下简称《制定》)的使用条件及方法作进一步的阐述,便于在制定中小型自由锻件工时定额时参考。一、使用条件1.《制定》适用于150～750kg 的空气锤在制定锻件工艺规程时,设备吨位的选择是很重要的,而制定工时定额时,就必须考虑设备的选择。同一个锻件,在不同设备上锻造 This paper mainly elaborates on the conditions and methods of using “free-wheeling for small and medium-sized forgings” (“Forging Machinery” 1985 № 3, hereinafter referred to as “making”), which is convenient for making reference to the hourly quota for small and medium size free forgings. First, the use of conditions 1 “development” for 150 ~ 750kg air hammer in the development of forgings process specifications, the choice of equipment tonnage is very important, and the establishment of working hours quota, we must consider the choice of equipment. The same forgings, forged on different equipment