工件

The results show that the surface roughness decreases with increase of the inclination angles within the range of 10° to 30°. After the angle approaches to 30°, increase of the inclination angle causes increase of the surface roughness. Furthermore, the effect of inclination angles on cutting speed was investigated.

研究结果表明：工件倾角的大小对已加工表面粗糙度有明显的影响，在倾角为10°～30°时，表面粗糙度随着工件倾角的增大而降低；此后，随着倾角的进一步增加，表面粗糙度有所升高。

First the math theory of machining simulation is studied, and the set structure of NC machining simulation system whose components, including time, input, output and so on, are defined. Hereby we set up the hierarchy structure, the logical structure, the static model and the dynamic model of simulation system. The construction method of sweep entity of cutter and rotation parts is researched, and their differential geometry invariants are calculated. NC code is unscrambled, and the recursion division arithmetic of time segment is put forward, which is the driven data of the movement or rotation parts. The CLDATA should be interference-free. To examine if there is interference between cutter flank and the work piece, an arithmetic that discussed the existence of intersecting curve between them is put forward. To examine if there is interference between two turrets, an arithmetic that discussed the existence of intersection set between two polygons is put forward.

首先研究加工过程仿真的数学基础，然后定义数控加工仿真系统的集合结构及时间集、输入集、输出集等概念，建立加工仿真的层次结构和逻辑结构，阐述双刀车削仿真系统的静态模型和动态模型建立方法，分析刀具扫描体和旋转部件扫描体的建立方法及其微分几何性质；研究NC代码解读技术和双刀加工时间段递归子分划技术，为驱动各仿真单元作数据准备；通过讨论后刀面和工件表面交线的存在性判断刀具后刀面与工件间是否干涉，通过求多边形的交集判断刀架与刀架是否干涉。

When it is great enough to destroy the combination between the top layer atom and the next layer of atom, the top layer atomics are removed.

随着工件表面受力的增大，工件表面可能产生塑性变形，足够大的时候就可以破坏表层原子与下一层原子之间的结合，实现表层原子的去除，反力越大就意示着能去除掉更多数量的原子。

Since there is no needto power off the machine during the process of measuring, it can reduce the workforce,heighten the production efficiency, depress the waster rate, and better the productcoherence. This kind of system is very suitable for the product pipelining which needshuge batches, such as auto components, axletree parts and so on.

由于它能使操作人员无需停机就能测量工件，减少了劳动强度，提高了生产效率，又降低了废品率，同时加工出的工件尺寸一致性较好，特别适应于在大批量流水线作业中使用，如汽车零部件、轴承零件的加工等。

Fix the edge bander on the blanket to band small woodpiece. Hold the edge bander in hand, to band big woodpiece.

封小型工件时可固定机器封边，较大工件封边可固定木板手提机器封边。

Corrosion resistance and adhesive force to coating of works could increase strongly by seal treatment to bluing works in silane coupling agent.

用该封闭剂对发蓝工件进行封闭处理后，能明显提高工件的抗蚀性和对涂层的附着力，解决了因皂化和铬酸盐钝化而带来的涂层附着力较差和环境污染等问题。

On the foundation of the reasonable fixed position, according to process the process in of be subjected to the dint appearance and clip the tight dint to arrange the principle, drawing up to clip the tight dint to arrange the project reasonablely;Passing the related calculation formula, cliping the tight dint size to carry on estimate towards process in the process, choosing the size structure to clip the tight motive component reasonablely, according to an oneself of work structure and processed requests and process to be characteristics by the dint in the process, choosing the design to clip the tight organization to guarantee by attain that the work piece positions accurate reasonablely, fast .

在合理定位的基础上，根据加工过程中的受力状态和夹紧力的布置原则，来制定夹紧力合理的布置方案；通过相关计算公式，对加工过程中夹紧力大小进行估算，来选择尺寸结构合理的夹紧动力元件，根据工件自身结构和加工的要求以及加工过程中受力的特点，来选择设计合理的夹紧机构以达到保证工件的定位的准确，快速。

Marc this paper carried out a finite element numerical simulation on the forming process of cold extruding for the starlike sleeve of constant speed cardan joint of car. The interrelated technological problems of numerical simulation were discussed in detail, the variation curve of extruding force during the course of loading, the cloud chart, which varies along with time, of temperature field distribution of workpiece, the equivalent plastic strain cloud chart of workpiece and the stress distribution cloud chart of diem inner ring were obtained thus explained fairly nice the reason of fatigue damage of dies.

Marc对轿车等速万向节星形套冷挤压成型过程进行了有限元数值模拟，详细讨论了有关数值模拟技术问题，得出了挤压力在加载过程中的变化曲线、工件随时间变化的温度场分布云图、工件等效塑性应变云图及模具内圈的应力分布云图，较好地解释了模具疲劳破坏的原因。

In the real production systems, part-sending process is incorporated for the first time, a common buffer is introduced to relax the environment of systems, and the JIT production style is introduced into supply chains.

生产系统的运作策略由各个单元的在制品控制机制和各个搬运车的工件输送策略构成。其中在制品控制包括看板和缓冲区两种机制，工件输送包括推动和拉动两种策略。

ABSTRACT To ensure the interchangeability of large cylindric components, it is not enough to measure the diameters only.

对于大型圆形工件，要保证其互换性，单纯测量直径是不够的，同时还需要测量工件的圆度误差。

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。