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译者前言 (1)麻花钻头是在机械制造企业中应用极为广泛的一种工具,每年的消耗量很大。苏联机械制造企业的钻头需要量,每年已达1000万根,所以在许多工具制造厂中,都设有专门的车间来制造麻花钻头。我们知道,制造钻头是需要贵重的优质钢、特殊的专门设备、和很大的劳动量。因此在钻头制造中,如何来节省贵重的材料,减少所需要的劳动量,以便制造更多的钻头来供应工业上的需要是一个很重要的、意义很大的、值得研究的工作。近年来,苏联在钻头制造的技术上获得了很大的成就,创造了新的钻头制造方法,既能节省材料,又使劳动量大为减少。
Translator’s Preface (1) Twist drill bit is a very broad application of a tool in the machinery manufacturing enterprises, each consumption is large. The number of drill bits required by the Soviet machine builders has reached 10 million a year, so in many tool factories there is a dedicated workshop to manufacture twist drills. We know that making bits is expensive steel, special equipment, and a lot of work. Therefore, it is a very important and significant work worthy of studying in the manufacture of drill bits, how to save valuable materials and reduce the amount of labor required to manufacture more drill bits to supply industrial needs. In recent years, the Soviet Union has made great achievements in the manufacture of bit technology and has created a new method of manufacturing bit, which not only saves materials but also greatly reduces the amount of labor.