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Based on the idea of the structure parametric design method, the parametric finite element model of drill chuck with complicated spiral surface character was established.'The related key technologies of drill chuck's strength analysis were discussed and solved, such as the contact analysis parameters selection, the boundary conditions and the load processing, ANSYS command一string building and so on.

本文采用结构参数化设计方法建立了含有复杂螺旋曲面特征的钻夹头参数化有限元模型；探讨和解决了钻夹头夹紧强度分析中夹爪与螺母接触分析参数的选择、约束边界和载荷处理、分析流程文件创建等关键技术问题。

First, the company tapping chuck Series Products: 1, S-type precision attack dual-use overload protection drill chuck series 2, Z-type drill chuck attack torque protection 3, L-type quick-style tapping chuck / L-cone-style fast tapping chuck 4, G-type torque protection of tapping chucks 5, T Series integration Tapping chuck 6, J-type floating tapping chuck 7, F-type full-floating silk attack folder the first 8, W-type import tap tapping chuck.

一、公司攻牙夹头系列产品：1，S型精密攻钻两用过载保护夹头系列2，Z型钻攻扭矩保护夹头3，L型快捷式攻丝夹头/L型内锥快捷式攻丝夹头4，G型扭矩保护攻牙夹头5，T系列一体化攻丝夹头6，J型浮动式攻丝夹头7，F型全浮动丝攻夹头8，W型进口丝锥攻牙夹头。

Since its establishment, the professional is committed to automatic machines, CNC computer lathe accessories, main products: welded carbide turning tool, cable Tsui, Fu Tsui, chuck, guide sleeve, drill chuck, three-axis lathe, spindle, PCB and other high-speed drill chuck parts processing.

成立以来，专业致力自动机，CNC电脑车床配件，主要产品：硬质合金焊接车刀，索咀，扶咀，夹头，导套，钻夹头，车床三轴，主轴，PCB高速钻夹头等配件加工。

Second, the Company CNC machinery series products: 1, BT-ER-type milling toolholder; 2, BT powerful tool shank-type Milling; 3, BT-type milling cutter disk plane handle; 4, BT-side solid-type handle; 5, BT drill chuck toolholder / BT whether Mohs flat tail cone shank hole; 6, attachment shank: straight shank to extend the rod / ER Lo run / ER Wrench / lock knife, such as Block 7, BT lining handle series; 8, a variety of flexible tube three folders, the Company other machine attachment Products: 1, rotating top; 2, dividing head, back wheel; 3, precision million power series ; 4, drill chuck; 5, find edges, etc. Wanted agents all over the country!

二、本公司数控机具系列产品：1，BT-ER型铣刀柄；2，BT强力型立铣刀柄；3，BT型平面铣刀盘刀柄；4，BT侧固式刀柄；5，BT钻头夹头刀柄/BT有无扁尾莫氏圆锥孔刀柄；6，刀柄附件：直柄延长杆/ER螺冒/ER扳手/锁刀座等7，BT搪刀柄系列；8，各种弹性筒夹三、本公司其它机床附件系列产品：1，回转顶尖；2，分度头、回转盘；3，精密万力系列；4，钻夹头；5，寻边器等诚征全国各地代理商！

The principal products dealt by the company are as followings:High Accuracy ER collet, Keyless Drill Chuck, Chuck, Living Center, Drill Arbors, Sleeves, 5C, R8, OZ.

山东济宁凯信机械制造有限公司，是专业生产制造精密弹簧夹头、模具及工程机械配件、螺纹工具、硬质合金刀粒及焊接刀具产品的制造商。

This is the dope for drill pipe thread. It can't be used for drill collar.

这是钻杆丝扣油，不能用在钻铤丝扣上。

It is also shown that different size of the drill collar and different distance between the coils and the drill collar have obviously different influence on the response of the coils in vacuum.

计算还发现，不同的钻铤尺寸、线圈系到钻铤不同的距离对线圈系在真空中的响应值具有较大影响。

The company employs 300 employees, including three professors, 12 senior engineers and 37 engineers, devoting to the research and development of drill pipe and drill collar.

公司坚持"以科技为先导，以客户为中心，以市场为导向"的宗旨，走"专、精、特、新"发展之路，为把公司建设成为开放型、国际化、现代化的企业而努力。

This paper systematically introduces the basic principle and advantages of magnetic particle inspection, the stress analysis of the oil drill collar and the magnetic particle inspection for the screw thread of the oil drill collar.

本文系统介绍磁粉检测基本原理及优点，石油钻铤的受力分析，石油钻铤螺纹的磁粉检测。

This thesis combines the actual inspections on oil drill collar and designs a set of technical criteria and operation code for magnetic particle inspection according to the latest standards and the present testing situation of oil drill collar.

本论文结合实际钻铤探伤，根据最新的标准和油田钻铤的检测现状，设计出了钻铤磁粉检测的工艺规范及工艺卡，对石油钻铤磁粉检测现场操作有指导性的帮助。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。