对削

Wear model and characteristics of the second cutting deformation zone,that is,between the rake face of cutter and chips were investigated by carrying out diamond PCD cutter ultraprecision machining test of SiC noncontinuous reinforced aluminum composites,and measuring analysis with atom force microscope and scan electronic microscope.

通过金刚石PCD刀具对非连续S iC增强铝基复合材料的超精密车削加工试验，考察了刀具第二切削变形区的摩擦磨损性能，并提出了相应的模型；采用爆炸式快速落刀装置制备出切屑根并分析了积屑瘤的影响因素；采用原子力显微镜对PCD刀具的刃口磨损形貌进行观察，并分析其磨损机理。

The surface characteristic of vitrified、resinoid and metal bonded CBN wheels trued by cup truer is observed with SEM, and their grinding parameter is achieved.

5，研究杯状砂轮对陶瓷、树脂、金属结合剂CBN砂轮的修形特性及其修形后CBN砂轮对不同材料工件的磨削特性。

The truing feature of vitrified and resinoid bonded CBN wheels trued by RDD with up-truing and down-truing and the property of grinding workpiece with CBN wheels is obtained.

4，研究金刚石滚轮在不同的修形速比下，对陶瓷、树脂结合剂CBN砂轮进行逆向和顺向修形的特性及其修整后CBN砂轮对高速钢工件的磨削特性。

Research on the Basic Kinematics-Geometry Theory and Tool Positioning Strategy for 5-axis NC Machining;2. The paper introduces the construction features of undevelopable ruled surface integral impeller and two 5-Axis numerical control mill machining methods of vane shape which are "line contact" and "point contact".

文章介绍了不可展直纹面型整体叶轮的结构特点及五坐标数控铣削加工叶片型面&线接触&和&点接触&两种方式，分析了采用侧铣加工产生误差的原因，对加工中的不同工步及精加工薄叶片的特殊处理进行了分析，并提出了相应的解决方案，对整体叶轮的数控加工有一定的现实意义和实用价值。

To improve the performance of NC machine tool,the paper introduces the method of custom macro program ming technique and simple call on transfer process of the metric system ACME screw thread.

介绍了米制梯形螺纹车削加工用户宏程序的编制和简单调用的方法，对提高数控机床的使用性能有很大的帮助，对其它非标螺纹的编程也具有一定的借鉴意义。

The results show that cutting tools and cutting parameters had an important influence on the quality of the fiber in the planing process of metal fiber. The larger rake angle and appropriate clearance angle of tools favored to fabricate metal fiber. Back engagement influenced the forming process of metal fibers most greatly, feed rate and cutting speed varied little.

研究结果表明：在金属纤维刨削成形过程中，刀具参数和切削用量对纤维的质量有重要影响，较大的刀具前角和合适的刀具后角有利于纤维的成形，而背吃刀量对金属纤维的成形影响最大，切削速度和进给量的影响则不明显。

In view of the differences in material property and fracture mode, the mechanism of using diamond polish to bore in component is studied, and a special diamond core boring bit is developed.

针对构件组成材料的性能特点和破坏方式，研究了佥刚石磨料对构件进行套料钻孔的机理，研制特定的钻孔工具和工艺装置，对构件钻削区及其周围材料施加预压应力。

In view of the differences in material property and fracture mode, the mechanism of using diamond polish to bore in component is studied, and a special diamond core boring bit is developed. The technological equipment can exert compressive pre-stress on drilling area and surrounding material.

针对构件组成材料的性能特点和破坏方式，研究了金刚石磨料对构件进行套料钻孔的机理，研制特定的钻孔工具和工艺装置，对构件钻削区及其周围材料施加预压应力。

Culms ca. 8 m, ca. 2.5 cm in diam.; internodes dull purple-green, becoming green with lower internodes tinged purple, to 35 cm, initially white powdery; wall ca. 5 mm thick; nodal ridge slightly elevated, as prominent as sheath scar; intranode ca. 5 mm. Culm sheaths pale red-brown, sometimes tinged green, sparsely to densely speckled, dark brown and glabrous along margins, sparsely strigose; auricles and oral setae well developed, purple; ligule purple, truncate to arcuate, short but broad, margin fringed with purple-tinged cilia; blade reflexed, purple to green, crinkled.

秆约8米，约厘米直径；节间愚笨紫色绿色，变得绿色与低节间紫色地微染着，令35厘米的是，最初白色粉状；壁约5毫米厚；节的稍隆起脊，象鞘痕一样突出； intranode约5毫米竿箨浅红棕色，有时微染绿色，疏生对浓密有斑点，暗褐色和沿边缘，疏生糙伏毛；叶耳和口头的刚毛发育良好，紫色；叶舌紫色，削去到弧曲，短但是辽阔，用紫色微染的cilia作为边缘的边；叶片反折，对绿色，皱曲紫色。

Based on the analysis of the milling theory of the mill-tenon machine, the cutting force and power were calculated. The structure and capability of milling tools (including multi-blade mill-cutter, three-blade handle mill-cutter and eccentric mill-cutter) were analyzed.

本文分析了数控铣榫机的铣削原理，对铣榫时的力和功率做了初步计算，分析了铣榫用的盘状多刃铣刀、三刃柄铣刀及偏心柄铣刀等刀具，对其结构和性能作了较深入的研究。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。