在轴承生产中,对轴承内外环的坯料生产,大多用手工自由锻和夹板锤自由锻,生产效率不高;质量亦很难保证,南京金陵滚珠轴承厂在大跃进中创造成功一台土扩孔机,从而提高了工作效率,减轻了体力劳动,保证了产品质量,节省了原材料。 这台土扩孔机适应于年产500万套以下的轴承厂用来轧 In the production of bearings, the inner and outer rings of the bearing production of billets, mostly by hand free forging and plywood hammer free forging, production efficiency is not high; quality is also difficult to guarantee that the Nanjing Jinling Ball Bearing Factory in the Great Leap Forward to create a successful earth expansion Hole machine, thereby enhancing the work efficiency, reduce manual labor, ensuring product quality, saving raw materials. This soil reaming machine adapted to the annual output of 5 million sets of the following bearing plant used to roll