钻尖

Solid carbide tungsten fishtail drill is suitable for pcb flexible foil clad laminate,used for target machine drilling,the features of pcb fishtail drill are thin and flexible plate,it's structure and cutting methods are different with normal pcb drill bits.its two main cutting edge is concave and formed 100degree angle,in order to distinguish with PCB drill,named fishtail drill.fishtail drill cuts beginning of circular drill.concave along the main cutting edge to cut,chip is just two much fine filament.cuttingis falling off naturally,in order to be processed without burrformation by pcb surface.

整体硬质合金鱼尾钻适合印制电路板行业加工挠性覆箔板，为打靶机钻孔用。鱼尾钻所加工的印制电路板特性是薄板、带柔性、这样就决定了它的结构和切削方式与一般PCB钻不一样，它的两主切削刃是内凹的，两主切削刃形成100度的夹角，为了与PCB钻区别，就叫它鱼尾名。鱼尾钻切削时从我圆处钻尖开始，沿着内凹的主切削刃切削，切屑只是两条极细丝状切削，整个切削自然剥落，从而被加工印制板表面平整无毛刺。

Point angles at outer corner and chisel edge corner are proposed to be used as the drill design parameters to determine the type uniquely and the relief angle is used as a supplement parameter.

针对该钻型的特点，提出用钻尖主刃的外缘和横刃转点处的锋角作为其设计参数值。

The drill point structural parameters of ellipse cone flank grinding are calculated.

计算了椭圆锥面后刀面刃磨钻尖的结构参数，分析了锥面机构参数以及刃磨参数对钻尖结构参数的影响。

Function relations between the twist drill design and the grinding parameters are derived.

并以尾隙角为补充参数，惟一地确定钻尖的刃磨参数。

The forming of flank of conical twist drill was studied and mathematical model of twist drill tine was founded in order to get formula of back clearance.

研究了锥面麻花钻后刀面的成型，建立了钻尖的数学模型，由此确定了后角的计算公式。

The result shows that auger drill tips has little effect on the hole drilling resistance.

结果表明，钻尖的类型对钻孔阻力矩有一定的影响，但较小；切土刀刃角在30°，45°，60°的变化，对钻孔阻力矩几乎没有影响。

Also, a mathematical model for grinding four plane facet drill point is given at the end of the paper, which provides a theoretical basis for new drill grinder design.

本文在现有钻尖数学模型研究的基础上，进一步完善了基本型群钻的数学模型。

Quite a number of effective gun drill point with complex-faceted flanks are available in the market.

生产中已经出现一些高效率的复杂型面枪钻钻尖；但是，需要建立它们的数学模型。

The design parameters of gun drill point are indispensable for inspection and grinding, especially in regrinding for worn drill points.

枪钻钻尖的设计参数是枪钻加工和检验的依据。

Employing the method of complex helical drill point design,the formula of the clearance angle of inner cut edge for the socket drill is derived and the relationship between the clearance angle and the slantwise angle of the inner cut edge is deduced to innovate the design and manufacture of the socket drill.

通过复杂螺旋面钻尖设计方法导出锪窝钻钻尖内刃后角公式及内刃后角与内刃偏角的关系表达式，改进了锪窝钻的设计与制造。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了