工件

The traverse grinding can be assumed as the sum of several stepwise plunging grindings with respect to the grindings contact area. The dynamic model of workpiece and grinding wheel stepwise plunging grinding was set up in the form of closed loops.

基于再生颤振机理，以切入磨再生颤振建模为基础，将外圆纵磨过程简化为多步以磨削接触区为磨削宽度的小切入磨的叠加，建立了工件、砂轮小宽度切入磨动力学模型并对其稳定性进行了研究。

In order to deeply reveal the smoothing mechanism of roller burnishing and to overcome the difficulty in the selection of the burnishing cross feed dependent mainly upon experiences and hand feel, the roller burnishing process is taken as an issue of plane-strain mechanics and the micro-plastic deformation area is determined on the basis of the Von-Mises yield criterion and by using the Boussinesq-Flamant solution. Then, the contact pressure distribution is obtained based on the Hertz contact theory, and the stress distributions in the burnishing tool and the workpiece are respectively revealed.

为深入了解滚柱滚压表面光整机理，解决目前滚压量选择完全凭经验和手感的不足，将滚柱滚压加工过程视为平面应变力学情形，利用Boussinesq-Flamant问题的求解并根据Von-Mises屈服准则得出了滚压局部发生微塑性变形的区域，根据Hertz接触理论得出了滚压接触压力分布及滚压过程中工件和工具的应力分布。

The web clamping mechanism divide into 2 groups: one side is screw hand wheel operation, the other side is hydraulic cylinder operation, and equipped with flange guiding rolls on entry/exit side of machine – by manual adjustable which rolls' pitch upon width of flange.

腹板夹紧机构分为二组，一侧用丝杆手轮操作，另一侧用液压油缸，实现工件夹紧，在机器前后各有一组翼板导轮–用手调整距离，致使工作时腹板基本处於主传动轮中间对称位置上。

The effect of sizing press conditions and the deformation at slab head end were also investigated.

2首次揭示了板坯在压力机调宽变形中，由于侧压过程的不连续造成的狗骨形沿工件长度方向不均匀分布的现象，这种现象表明，在板坯中段通常人们所认为的稳定变形阶段仍有厚度尺寸波动现象，并将对宽度精度产生影响。

Its implementing agency has two: First, is loaded with four location work piece rotary table; second, is loaded with three cutting tool's headstocks which the special-purpose electric motor leads.

它的执行机构有两个：一是装有四工位工件的回转工作台，二是装有专用电动机带动的三把刀具的主轴箱。

Based on grinding temperature experiment and heat transfer theory,grinding heat partition in engineering ceramics is obtained.

基于磨削温度的实验和传热学理论，得出了工程陶瓷工件的磨削热分配比；得出了干磨及湿磨两种状态下工程陶瓷磨削温度场的分布。

The results show that laser-arc welding can achieve full penetration by single-path butt jointing through appropriate parameters; Y shape groove with 8 mm truncated edge can enhance the penetration ability of laser-arc hybrid welding. Low welding speed is good for penetration, however the limitation still exists for hick plates joint. Gap is significant factor of penetration when work pieces is large thickness. The hardness of thick plates joint shows that there is big difference in mold of vertical thermal cycle using laser-arc hybrid welding.

结果表明：通过激光功率等焊接规范匹配，激光-电弧复合焊接能实现20 mm厚板的全熔透单道对接；钝边为8 mm的Y形坡口有助于提高厚板激光-电弧复合焊缝熔透能力；降低焊接速度有利于提高熔深能力；工件厚度较大时，装配间隙对焊缝熔深能力的影响较为显著；接头硬度表明厚板激光复合焊焊缝纵向热循环模式存在较大差异。

This paper has introduced the phenomenon of mutual interference occurred in cutting tool, tool shank, workpieces and so on when milling the 3-D impeller .

简要介绍了铣制三元叶轮时，出现刀具、刀柄、工件等相互干涉的现象，并对其产生的原因进行了详细分析，探讨了避免此种现象的有效方法。

According to the specification, the corrosion resistance of black oxide coating on iron and steel surface should be tested by oxalic acid spot test.

发黑时间约4 到5分钟，至形成均匀细密的黑色氧化膜。用自来水洗去工件表面的残留发黑液，用热风将其吹干待测。

The large-diameter measurement of large workspace in-process is still a worldly difficult problem that has not be solved completely in mechanical industry.

大直径工件尺寸加工现场的高精度测量技术是当前国内外尚未圆满解决的世界性技术难题。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。