薄壁曲面后轴颈的工艺研究

Research on Thin-Walled Curved-Surface Backshaft Process

高温合金薄壁后轴颈是关键工件,在结构上突出特点为薄壁、刚性差、类鼓筒型面、型面圆弧半径大、圆弧转接多,加工过程中易变形。该工件材料为高温合金,属于难加工材料,可切削性差,在加工过程中极易累积较大机加应力,增大工件的变形量。同时各尺寸公差和技术条件要求严格,难以保证加工质量。经过制定合理的加工路线及加工方法,设计专用减小变形的车床、镗床夹具,选择恰当的刀具及加工参数,减少工件的变形,保证了工件的加工质量。该工件的合格交付不仅保证装配要求,还为今后同类型工件的加工积累了经验。

High-temperature alloy thin-walled backshaft is a key part. Characteristics in structure is thinwalled, poor rigidity, like the drum surface, big-radius of surface arc and easy deformation process. Parts material is high-temperature alloy, which belongs to the diffi cult-tomachine materials, having the poor cutting performance and easy to accumulate stress in the process, increasing the deformation of part. Strict to lerance and technical requirements are strict. Qualifi ed parts are manufacted by formulating rational technological route and processing method,designing special fixture to decrease the deformation using on lathe and boring machine, selecting the proper tool and the reasonable processing parameters to reduce the deformation. Qualifi ed delivery of parts ensures the assembly requirement, accumulate the experience of manufacturing the similar parts.