螺纹

Considering the pitch deviation, pitch accumulative deviation, flank angle deviation and their combined influence on the pitch diameter, the authors present a complete differential optimal approximate model in this paper and use the ideal thread to approximate the actual thread radially and axially.

本文建立的螺纹中径当量全微分优化逼近模型，考虑了螺距偏差、螺距累积偏差和半角偏差本身及其相互间对中径的综合影响，并用理想螺纹在径向和轴向二维逼近实际螺纹。

Many techniques and skills for turning trapezoidal thread that applied in common lathe were integrated dexterously in this program.

在程序中巧妙地结合了普通车床车削梯形螺纹时应用的各种工艺技巧，采用分层切削、螺纹切削粗、精加工分段降低牙侧的表面粗糙度，为数控车削梯形螺纹提供了一个实用合理的加工程序。

Lead Ph Basic load rating Permissible load F P Nut mass Shaft mass Dynamic rating Ca Static rating C 0 a mm kN kN kN kg kg/m 12 33.9 79.2 5.42 8.12 Type using standard material Standard grease Standard seal Iron-based AFB-LF None Dimensions of the Ball Screw Nut Attached with Wiper Ring W and QZ Lubricator WW avail- ability QZ avail- ability Dimensions including WW L Length of protrusion with QZ attached QWL Outer diameer of protru- sion with QZ...

载荷钢球圈列数 DN值预压预压方法预压负荷 1row 3.50圈 70000 有定位置预压 1940 导轨型号丝杠轴加工方式球保持器轴的花键部分中空轴滚珠精密无无无轴承支撑座固定侧的推荐方式轴承支撑座支撑侧的推荐方式螺母种类螺纹方向间隔钢球 BK30，FK30 BF30， FF30 双螺帽右螺纹，左螺纹，左右螺纹无轴方向刚。。。

Lead Ph Basic load rating Permissible load F P Nut mass Shaft mass Dynamic rating Ca Static rating C 0 a mm kN kN kN kg kg/m 10 30.7 79.3 5.26 10.65 Type using standard material Standard grease Standard seal Iron-based AFB-LF None Dimensions of the Ball Screw Nut Attached with Wiper Ring W and QZ Lubricator WW avail- ability QZ avail- ability Dimensions including WW L Length of protrusion with QZ attached QWL Outer diameer of protru- sion with QZ...

载荷钢球圈列数 DN值预压预压方法预压负荷 1row 2.50圈 70000 有定位置预压 1535 导轨型号丝杠轴加工方式球保持器轴的花键部分中空轴滚珠精密无无无轴承支撑座固定侧的推荐方式轴承支撑座支撑侧的推荐方式螺母种类螺纹方向间隔钢球 BK30，BK35，FK30 BF30， BF35， FF30 双螺帽右螺纹，左螺纹，左右螺纹无。。。

Lead Ph Basic load rating Permissible load F P Nut mass Shaft mass Dynamic rating Ca Static rating C 0 a mm kN kN kN kg kg/m 8 39.1 132.3 5.08 14.0 Type using standard material Standard grease Standard seal Iron-based AFB-LF None Dimensions of the Ball Screw Nut Attached with Wiper Ring W and QZ Lubricator WW avail- ability QZ avail- ability Dimensions including WW L Length of protrusion with QZ attached QWL Outer diameer of protru- sion with QZ...

载荷钢球圈列数 DN值预压预压方法预压负荷 1row 2.50圈 70000 有定位置预压 695 导轨型号丝杠轴加工方式球保持器轴的花键部分中空轴滚珠精密无无无轴承支撑座固定侧的推荐方式轴承支撑座支撑侧的推荐方式螺母种类螺纹方向间隔钢球 BK20，EK20，FK20 BF20， EF20， FF20 双螺帽右螺纹，左螺纹，左右螺纹无轴。。。

This paper introduces the structural characteristic and the way of selecting and confirming diameter of the three-needle on measuring pitch diameter of thread, while the thread gauge is manufactured.

非标M77×2(3°／45°)特锯齿形螺纹在我国还较少见，这里对该螺纹的结构特点作了介绍，同时介绍了该螺纹量规制造过程中使用三针测量螺纹中径时，如何选择和确定三针直径。

The company also specializing in the production of supporting a variety of cold extrusion steel, cone thread connecting sets, rolling straight thread connecting sets, stripping rib straight thread connecting sets, torque wrench, the wrenches, cutting tools, thread gauge, smooth gauge , The teeth of regulations, such as ring-regulation.

公司还专业生产相配套的各种规格的冷挤压钢套、锥螺纹连接套、滚压直螺纹连接套、剥肋直螺纹连接套、力矩扳手、工作扳手、切削刀具、螺纹量规、光滑量规、牙型规、环型规等。

In order to real-timely and accurately measure thread parameters such as thread angle(tooth-type half-angle),screw-pitch,lead,thread height,major diameter,minor diameter,pitch diameter,helix angle etc,and enhance the measuring accuracy,a non-contact thread parameter measuring system based on an array CCD was designed and achieved.

为实时准确地对螺纹的牙型角、螺距、导程、螺纹高度、大径、小径、中径、螺纹升角等参数进行测量，并提高测量精度，设计并实现了基于面阵CCD的螺纹参数非接触测量系统。

The VCL method and the displacement method are used to calculate the Stress Intensity Factors of semi-elliptical surface crack at the root of pipe screws, on the basis of which a simplified calculating model for screws contact is put forward so as to analyse the fracture intensity for oil drill pipe screw coupling. For the semi-elliptical surface crack with different shape and deep ratio at the root of female and male screws and the corner of male flange, the SIF has been studied systemically under inter-pressure, tension, bend and torsion loads and the approximate formulas encluding the structure parameters of oil drill pipe screw coupling, deep ratio and the shape parameters of surface crack are developed.

对工程实际中的多种石油钻杆接头螺纹连接件，就公螺纹齿根、母螺纹齿根、公螺纹台阶转角处存在的不同形状、不同厚度比的半椭圆表面裂纹，在拉伸、内压、弯曲、扭转多种载荷作用下的应力强度因子作了系统研究，在大量有限元计算基础上，建立了包含接头结构参数、裂纹形状、厚度比在内的近似计算公式。

The study on drilling collar screw-stick,analysis of drilling collar screw thread and test of material and thread parameter have been done.

对钻铤粘螺纹事故进行了调查研究，并进行了宏观形貌和材质分析；对新钻铤材质和螺纹参数进行了检验，并采用不同旋螺纹扭矩对新钻铤试样进行了上卸螺纹试验。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失