钻头

The drill is usually mounted in a drill chuck or held in a bushing and fed into the rotating work.

钻头通常安装在钻头卡盘或轴衬中，并向旋转的工件进给。

A person can place a drill in the drill chuck that is secured in the spindle of the drill press. They can then select the desired speed for rotation (commonly by switching belt pulleys), and activate the spindle. Then they manually pull on the quill lever to drive the drill into the workpiece being machined.

操作者可以将钻钻头装在钻夹中，钻夹固定在台钻的轴里；接着可以选择所需的转速（通常通过切换皮带改变主轴转速），并且启动主轴旋转，然后操作钻轴手柄，将钻头钻入被加工的工件。

The dung beetle is selected as bionic prototype in this paper to design the working layer of an impregnated diamond bit,which makes the bottom surface always keep the same non-smooth shape and makes the bionic bit maintain a high penetration rate and long-life...

以蜣螂为仿生原形，设计孕镶金刚石钻头的工作层，使工作层底唇面始终具有相同的非光滑形态，始终保持高钻速和长寿命，突显出仿生金刚石钻头的高效率、耐磨和减阻特点。

At least one through-bore in each of the drill guide arms guides a drill bit at right angles into the work piece, with each through bore (17, 18) having an axial length sufficient for guiding a hand held drill to drill a work piece bore at right angles to the joint surface.

在每个钻孔导向臂中至少有一个通孔，用于以直角将钻头导向到工件中，每个通孔（17，18）都在轴向上足够长，以在与连接表面大致成直角的方向导引手持钻头来钻出工件孔。

Moreover, looking the nozzle as the important part of the PDC Bit , we deeply discuss the influence of the waterpower parameter and the location parameter influence the PDC Bit, we design the nozzles waterpower parameter.

同时将喷嘴作为PDC钻头水利系统的重要组成部分，深入地讨论了喷嘴的水力参数和位置参数对PDC钻头水力性能的影响，进行了喷嘴的水力参数设计。

It is not ideal to design cone bit with ordinary CAD method owingto the complexity of the bit's structure, therefore a parametrization design method is presented.

牙轮钻头结构复杂，设计困难，使用普通的计算机辅助设计方法难以收到理想的效果。为此，研究了牙轮钻头参数化设计方法。

On this basis, we use numerical value to simulate the waterpower parameter of the PDC Bit, we use Visual C++ plait the PDC Bits waterpower parameter calculation program.

在此基础上对PDC钻头的水力参数进行了数值模拟，用Visual C++编制了PDC钻头的水力参数计算程序。

The research of this paper is the main content of scientific research item which completes by KINGDREAM Public Limited Company cooperation with Southwest Petroleum University.

本文的研究工作是江汉钻头股份有限公司与西南石油大学合作的科研项目"钢齿牙轮钻头齿面强化材料及强化工艺研究"中的主要内容。

The Jet Snake Rooter combines Cable and head cutting strength with high pressure cleaning at 1100 PSI and 1.9 GPM wash away efficiency.

蛇形挖掘水枪钻头结合缆索和切割钻头，具有高达1100 PSI的水压压强和每小时431公升的喷射量，能够有效清除堵塞物。

Moreover drilling measures in different strata are pointed out,which are firstly drilling without slurry in part of silty clay layer,secondly adopting double-bottom bailing bit and bore directly and abandoning slurry with impact drilling rig in muddy clay layer,thirdly selecting short screw auger at low speed in gravel layer,finally choosing rock-socketed drilling tube in shaly sand layer.

指出旋挖钻机在不同地层中的钻进措施：部分粉质粘土层中可用清水或干孔钻进，淤泥质粘土层中采用双底捞砂钻头、直接用冲击钻机钻孔弃浆，圆砾层中采用短螺旋钻头低速钻进，泥质砂岩层中采用嵌岩钻筒钻进等措施，保证施工工期满足架梁节点要求。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。