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壁厚在1mm以下的薄壳零件,在机械加工中,承受定位、夹紧力小,切削时易产生振动,影响壁厚尺寸误差,采应用填料工艺技术,将图中的铝合金薄壳件进行了加工,其加工工艺如下: (1)金相处理:为适应在温度变化条件下工作和克服加工产生变形,分两次高底温时效处理,以消除毛坯和切削加工中产生的内应力,稳定金相组织。 (2)填料:将薄壳零件内部加工到尺寸,外形留有2～3毫米余量,将白蜡熔化浇入。在浇入前将通孔,螺纹部分用纸和塑料薄膜封严,如图所示。当零件浇入蜡后装夹定位时,受力变形小,切削无振动,加工后壁厚均匀,从而使机械加工简单。
Thickness of 1mm below the shell parts, in machining, bearing position, clamping force is small, easy to produce vibration when cutting, affecting the size of the wall thickness error, adopt the packing technology, the figure of the aluminum alloy shell pieces (1) metallographic treatment: In order to adapt to work under conditions of temperature change and to overcome the deformation of the processing, two high-temperature aging treatment in order to eliminate the internal stress generated in the rough and cutting , Stable metallurgical organization. (2) packing: the shell parts processed to the size of the internal shape leaving 2 to 3 millimeters margin, pouring white wax melt. Before poured into the through-hole, threaded part of the paper and plastic film sealed, as shown. When the parts are poured into the wax clamping position, the force deformation is small, cutting no vibration, uniform wall thickness after processing, making the machining simple.