| 摘要 |
1. A method of planishing duralumin forgings in which forgings are initially subjected to rough grinding with the use of ceramic, preferably Carborandum abrasives moisted with an aqueous solution of any degreasing agent, and the mixture of forgings, abrasives and the degreasing agent is rotated, and after finishing the rough grinding, the process is repeated as the finishing grinding but with the use of abrasives with smaller sizes characterised in that in the process of rough grinding, the forgings are mixed in the proportion not exceeding 1:7 with ceramic abrasives not larger than 12 mm and the graining of the abrasive material not exceeding 46.6 micrometer using maximum 0.5 percent water solution of a degreasing agent, and the whole mixture is subjected to a toroidal screw motion, the impure degreasing agent is constantly replaced with a pure agent, and the whole process of rough grinding lasts 60-300 minutes, and further, in the process of the finishing grinding, the forgings are mixed in the same proportion with ball-shaped and porcelain abrasives with diameters not exceeding 10 mm using 1.2-2 percent water solution of the degreasing agent, which is also constantly replaced, and the whole process of finishing grinding lasts 30-180 minutes.
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