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中小型气扳机行星轮架上两φ4~(+0.013)孔(见图1)的加工质量多年来一直未能达到设计要求,废品率很高,是生产中的一大关键。为了突破关键,提高产品质量,以B10A产品的行星轮架为突破口,作了改进尝试。行星轮架上两小孔的加工采用钻、铰工艺,关键在钻孔,而钻孔的关键在钻孔夹具。为此,对钻孔夹具进行了改进设计。新设计的钻孔夹具在2000多个零件上进行了生产性验证,取得了较理想的效果,零件的合
The processing quality of two φ4 ~ (+0.013) holes (see Figure 1) on the small and medium gas trigger planetary carrier has not been able to meet the design requirements for many years. The rejection rate is very high and is a key factor in the production. In order to break the key to improve product quality, B10A planetary carrier as a breakthrough, made some improvements. Two small holes in the planet wheel frame processing using drilling, hinge technology, the key in the drilling, and drilling the key in the drilling fixture. To this end, the drilling fixture has been improved design. Newly designed drilling fixture in more than 2000 parts of the productivity verification, and achieved satisfactory results, the parts of the joint