车加工弯管头和三通等模锻或精铸异形工件时,在三爪卡盘上很难解决。我们用低熔点合金或生铝制成一种夹具,可利用三爪直接装夹。经使用证明,效果很好,可减少辅助时间,夹具制作简单根据不同外形随时铸造。首先在工件待加工部分的后面轴线上打一个φ12毫米通孔,在孔内打进销子3。找正后,在销子上打一个中心孔(附图),车一个略带锥度的铁套,作为浇铸夹具的 Machining pipe elbows and tees, such as forging or casting special-shaped workpiece, the three-jaw chuck is difficult to solve. We use a low melting point alloy or aluminum to make a fixture that can be clamped directly with a three-prong clamp. Proved to be used, the effect is very good, can reduce the auxiliary time, fixture making simple cast according to different shapes at any time. First of all in the workpiece to be machined part of the back of the axis to play a φ12 mm through hole in the hole into the pin 3. After finding a hole in the pin hit a center hole (with photos), a slightly taper iron car, as a casting fixture