内弧面

This research presented a new guide mechanism and belt driving theory of the abrasive band polishing for inner aperture, satisfied the driving requirement of abrasive belt leading smoothly into grinding area, realized the band grinding and band polishing of inner aperture, developed a abrasive band polishing headstock for of the ball track of ball bearing and roller bearing individually adopting a way of curvature concave oscillating and vibrating, researched the process regular and fundamental process method and parameter of abrasive band polishing of ball track. The results of experiments and tests showed that the surface roughness of ball track by abrasive band polishing can reach Ra0.02μm, and the original geometric cross section shape precision of ball track can be kept.

本项研究提出了砂带研抛内孔的新型导引机构和传带原理，满足了砂带平稳导入内孔磨削区的传动要求，实现了内孔的砂带磨削和研抛；研制了采用弧面摆动和振动方式分别用于球轴承滚道和滚柱轴承滚道研抛的砂带研抛头架；研究了轴承滚道砂带研抛的工艺规律和基本工艺方法、工艺参数；实验测试结果，轴承滚道砂带研抛的表面粗糙度达Ra0.02μm，研抛过程保持了滚道的原始几何截面形状精度。

The faces of turbine blade s body is complex,in the general CAD platform,fitting spline of intrados and convex based on points of data,creating fillet of leading edge and trailing edge,and achieving the body of turbine blade at last are all complicated processes.

汽轮机叶片叶身型面比较复杂，在通用CAD系统中，根据数据点拟合出内、背弧样条曲线，修进出汽边圆角，最后根据每个截面形状得到叶身实体，都是比较复杂的过程。

Type IB: Isocline is convergent towards inner arc at a right angle to the fold.

根据等斜线的收敛层度，再细分为三个亚型：IA型：等弧线向内弧强烈收敛，各线长短判别极大，内弧曲率远大于外弧曲率，为典型的顶薄褶皱；IB型：等倾斜线向内弧收敛，并与褶皱面垂直，各线长短大致相等，褶皱层真厚度不变，内弧曲率仍大于外弧曲率，为典型的平行褶皱；IC型：等斜线相内弧轻微收敛，转折端等倾斜线比两翼附近的要略长一些，反应两翼厚度有变薄的趋势，内弧曲率略大于外弧曲率。

The formula was established about calculating design parameters and technological parameters of ideal strip and bent strip in the period of forming. The thesis presented how to calculate the deformed area length and contact are radius of contact deforming between two elastic bodies on condition of the friction. The calculating formula of pinch force about plate-strip pinch mill was given and the results were analyzed that friction coefficient and radius of pinch rolls are very important for determining pinch force. Moreover, the rule of deforming and stress distribution of different 〓 ratio were gained on condition that the deforming was considered to be non-uniform distribution in the gap. The differential equations were got that calculate the displacements of large deflection of elastic cantilever rectangle plate with fixed end and the formula of the Finite Strip Method was conducted to study the regularity of mid-plane displacements, deformation and stresses for elastic-plastic large deflection bend of cantilever parallelogram plate with fixed or slidable end by integrating Prandtl-Reuss equation.

建立了一套完整的设计参数计算公式和在成型过程中理想带钢或具有月牙弯带钢的工艺参数的调整公式；在考虑摩擦力的条件下，对两弹性体接触变形过程中的接触变形区长度和接触弧半径用位移解法进行了研究，推导了板带递送机的递送力计算公式，从而得知在递送机设计过程中，应选择适当摩擦系数和辊身直径；另外，还从辊缝内带钢实际变形出发，分析了对于不同的〓值，带钢的变形规律及应力分布状况；建立了固定端悬臂矩形板弹性大挠度弯曲变形的控制方程，并且在对Prandtl-Reuss方程的积分处理的基础上，导出了固定端和滑动端悬臂平行四边形薄板的弹塑性大挠度的中面伸展位移、变形和应力的有限条元法公式，编写了Fortran语言计算程序，在各种参数条件下，对螺旋焊管成型过程变形规律进行了全面的分析研究，从而为螺旋焊管的生产和进一步的改进提供了理论依据。

Contact lines between worm and worm gear and relative curvature are the mainfactors that influence the properties of worm gear drive.

在《渐开线内啮合弧面蜗杆》的第一报中，已经详尽地阐明了提出这种蜗杆的理论依据。

The height of central part of the round cambered surface is equal or higher than the one of ring- shaped bulge. When the horizontal top side of internal cavity of encapsulation mold is pressed down to the heat sink so as to produce a deformation, the cambered surface can not be pressed to oppress the subjacent metal line, and the ring-shaped bulge can also prevent mold-overflow.

该散热片，适用于封装制程，具有一圆形弧面板部，并且其圆形弧面板部的中央是高于或等于环状凸起的高度；如此一来，当封胶模具内模穴的水平顶面下压至散热片上而使其产生变形时，圆形弧面板部就不会压迫到下方的金属线，而环状凸起同样也可发挥防止溢胶的功能。

The cavity of the Titleist CB irons has been optimised to include an inner cavity muscle being the impact area to promote a solid feel on every shot and the blunted leading edge works with the cambered sole for smooth turf entry and release time after time.

该文件是Titleist铁杆腔已被优化，包括肌肉内腔作为影响地区，以促进每一杆坚实的感觉和削弱与光滑的草坪进入和释放时间后，时间弧面唯一的领先优势工程。

The main research works of the project are focused on the ball track with a big curvature concave cambered surface, especially the fundamental theory, method , mechanics, and process parameter optimization about ultra-precision abrasive band polishing for ball track of inner aperture.

本项目主要研究轴承滚道这种大曲率凹弧面，尤其是针对内孔滚道的超精密砂带研抛的基础理论、方法、机理及工艺参数优化。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。