我厂有一种汽车化油器零件,毛坯采用锌合金压铸成型,内孔壁厚2mm.为保证精度,制造工艺要求以内孔为基准,车削底端面。过去用弹簧夹筒式的夹具加工,难以保证质量。后来我们设计制造了图示之简易车夹具,用它加工出来的薄壁零件都能达到技术要求,质量稳定,生产率高。使用时,旋转拨盘4,迫使扁销3带动锥度拉杆8产生轴向运动,拉杆上的圆锥就推动四件卡爪7扩张,实现对零件的紧固。当拨盘反旋时,在压力弹簧2的作用下,锥度拉杆和四件卡爪恢复原有位置,实现对 I plant a car carburetor parts, the use of zinc alloy die-casting blank, the hole wall thickness 2mm. To ensure accuracy, manufacturing process requires the hole as the base, turning the bottom surface. In the past with spring cartridge-type fixture processing, it is difficult to ensure quality. Later, we designed and manufactured a simple car fixture pictured, with its thin-walled parts processed to meet the technical requirements, quality and high productivity. When in use, the rotary dial 4 forces the flat pin 3 to drive the taper rod 8 to generate axial movement, and the cone on the pull rod pushes the four pieces of pawls 7 to expand to achieve the fastening of the parts. When the dial anti-rotation, under the action of the pressure spring 2, the taper rod and the four pieces of claw to restore the original position, to achieve