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废旧三爪卡盘,弃之可惜,用之困难,经改造可制成如图所示的内锥胀胎。使用内锥胀胎、三爪卡盘和尾座顶针配合,可加工内径大且又长的空心圆柱形的外圆、内外止口、端面及端头内外螺纹,此装置受到工人好评。改装方法:留下压爪可换式三爪卡盘的三爪卡盘体与压爪齿条,其余拆除。然后按照机床主轴锥孔和工件大小配作心轴2、顶杆6及顶杆固定板4,同时按工件与三爪齿条配作内锥胀块15和外锥胀销8。制作内锥胀
Discarded three-jaw chuck, abandoned a pity, with the difficulties, the transformation can be made as shown in cone swell tire. The use of inner conical inflated tire, three-jaw chuck and tailstock thimble with, can process large diameter and long hollow cylindrical outer and inner stops, face and internal and external threads, this device by the workers. Modified method: left the pressure claw exchangeable three jaw chuck three jaw chuck body and the pressure claw rack, the remaining demolition. Then according to the machine tool spindle taper hole and the size of the workpiece for the mandrel 2, the mandrel 6 and the mandrel fixed plate 4, while the workpiece and the three-jaw rack equipped with inner tapered expansion block 15 and the outer tapered pin 8. Production of conical expansion