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在机械加工中,打中心孔是一项不可缺少的工作。在车床上大批打孔时,如果用卡盘卡紧工件,则比较费工费力。本文介绍一种不停车打中心孔工具(简称打孔器),它可提高工效3～4倍,对直径φ50mm以下,长度不大于200mm的工件均可使用。打孔器(图1)安装在车床刀架上,用增减刀垫厚度和移动中拖板来调整中心孔的位置。在卡盘上夹着一个根据工件直径而加工出的碗胎(图2)。当大拖板向前移动时,用手将工件放入碗胎内,大拖板靠紧时,工件即靠摩擦力开始转动。这时便可打中心孔或钻孔。钻完孔后,大拖板向后移动,工
In the machining, the center hole is an indispensable job. When a large number of holes in the lathe, chucking the workpiece with the chuck, the more laborious effort. This article describes a non-stop playing center hole tool (referred to as the hole punch), which can improve work efficiency 3 to 4 times, the diameter of φ50mm the following, the length of not more than 200mm of the workpiece can be used. Punch (Figure 1) is mounted on the turret and adjusts the center hole position by increasing or decreasing the thickness of the mat and moving the carriage. A clip of the bowl is machined on the chuck according to the diameter of the workpiece (Figure 2). When the big carriage moves forward, the workpiece is put into the bowl by hand. When the big carriage is close, the workpiece starts to rotate by friction. Then you can hit the center hole or hole. After drilling the hole, the big drag move backwards