作业帮英语翻译Drills and Drilling Machines The twist drill is a very e
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英语翻译
Drills and Drilling Machines The twist drill is a very efficieng tool.It is generally formed by forging and twisting grooves in a flat strip of steel or by milling a cylindrical piece of steel,high-speed steel being commonly used.High-speed steel costs more but toos made of it with stand heat much better than those of ordinary tool steel.The twist drill may be divided into three principal parts:shank,body and point.The flutes are the spiral grooves that are formed on the side of a drill,drills being made with two,three,or four flutes.Those having three or four flutes are used for following smaller drills or for enlarging holes already drilled,and are not suited for drilling into solid stock.Spiral flutes have four main advantages:1.\x05They give the correct rake to the lip of a drill;2.\x05Theycause the chip to curl so tightly that it occupies the minimum amount of space;3.\x05They form channels through which chips escape from the hole;4.\x05They allow the lubricant to flow easily down to the cutting edge.
Drills and Drilling Machines The twist drill is a very efficieng tool.It is generally formed by forging and twisting grooves in a flat strip of steel or by milling a cylindrical piece of steel,high-speed steel being commonly used.High-speed steel costs more but toos made of it with stand heat much better than those of ordinary tool steel.The twist drill may be divided into three principal parts:shank,body and point.The flutes are the spiral grooves that are formed on the side of a drill,drills being made with two,three,or four flutes.Those having three or four flutes are used for following smaller drills or for enlarging holes already drilled,and are not suited for drilling into solid stock.Spiral flutes have four main advantages:1.\x05They give the correct rake to the lip of a drill;2.\x05Theycause the chip to curl so tightly that it occupies the minimum amount of space;3.\x05They form channels through which chips escape from the hole;4.\x05They allow the lubricant to flow easily down to the cutting edge.
钻具和钻孔机麻花钻是一个非常efficieng工具.它通常是由锻造和捻槽在一块条形或铣圆柱一块钢,高速钢,常用.高速钢工具的成本但它站热明显优于普通工具钢.麻花钻可分为三个主要部分：柄,身体和点.凹槽螺旋槽形成于侧钻,是由两只,三,或四个长笛.那些有三个或四个长笛用于以下小演习或扩大已经钻洞,和不适合钻成固体股票.螺旋长笛有四个主要优点：给正确的耙子1他们的唇演练；造成的芯片2他们卷曲如此紧密,它占有的最低数额3他们形成的渠道王牌；芯片脱离孔；使润滑剂4他们容易流下来的前沿.
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