对削

This paper takes use of the features of ultrasonic grinding which can make the macroscopic force, stress and calory in grinding lower, and then utilizes relevant abrasive in the ultrasonic grinding.

本文利用超声加工宏观磨削力、磨削应力、磨削热小，对加工材料表面损伤低的特点，再结合相关磨料对高精度超薄水晶片表面进行超声磨削加工。

Analysis was also made on the influence upon the grinding forces in case of the same friction factor between wheel and workpiece at different grinding speed, as well as in case of different friction factor between wheel and workpiece at the same grinding speed.

分析了砂轮与工件表面之间的摩擦系数相同而磨削速度不同时对磨削力产生的影响，以及磨削速度相同而摩擦系数不同时对磨削力产生的影响。

A new technology,which is called non-interference normal tracking for NC curve grinding was presented.

将快速点磨削技术引入到曲线磨削过程中，提出了曲线磨削中砂轮对工件轮廓实施法向跟踪磨削的新方法。

The inverse relationship between specific grinding energy and undeformed chip thickness was established.

对超高速磨削条件下比磨削能的影响因素进行了分析，得出了在超高速磨削下，比磨削能与未变形的磨屑厚度的关系。

This paper studied the grinding mechanism of this new type superalloy on the base of systematical analysis of variable characteristics of the grinding force, grinding temperature, topography of ground surface, residual stress distribution and hardness distribution of surface layer, as well as morphology of surface layer from a metallographical point.

摘 要：为解决定向凝固高温合金DZ4在磨削加工中极易发生的磨削烧伤问题，采用先进的测试方法，对磨削过程中磨削力、磨削温度、工件表面形貌、表面层残余应力分布、表面层显微硬度、表面层金相组织等变化规律进行了分析研究，揭示出该种新型高温合金材料磨削烧伤机理。

The characteristic of machined surface of high speed machining aluminum alloy 7050-T7451 is researched by micrographic experiments and analysis. The formation mechanics of machined metamorphism layer has been analyzed and studied. The dislocation-energy model in machined metamorphism layer was established and applied to explain the micrographic mechanics work-hardening using the thermo-mechanical coupling deformation theory and dislocation theory. The experimental results show that the interaction of high dislocation density effect on hardening is more remarkable than that of thermal stress in high speed machining.

利用显微观察方法对铝合金7050-T7451高速铣削加工的工件表面断面和不同深度的表层的微观形貌特征进行系统的研究，确定了高速切削加工铝合金7050-T7451的表面变质层深度为30～35μm；应用位错能量研究了高速铣削加工过程的热力耦合对变质层的影响机理，并通过微观形貌观察证明：与普通切削相比，高速铣削表层塑性变形的能量和位错密度更高；建立了位错密度的加工硬化的动力学模型，研究了加工硬化的热-力耦合形成机理；对微观裂纹的形成机理进行了理论分析，证明位错密度高的高速切削过程中较低速加工更容易产生明显的微裂纹，从分子级乃至原子级的水平进一步揭示高速切削加工表面变质层的形成特征。

Based on the relevant movement between hard shaper cutter and grinding wheel, the movements of grinding wheel are studied. The shaping grinding point and the shaping grinding edge are made up with. In order to easily compare when shaping errors and cutting edge"s angles are the most excellent, uniform expressions for convex curved rake face of hard shaping cutter and spatial cutting edge curve are separately developed. The distributions of new profiling cutter"s shaping errors and cutting edges angles are analyzed. The relevant grinding wheel and cam are designed. Due to this paper, a new profiling hard shaping cutter has been manufactured successfully. At last experiments are made to test the performance of hard shaping cutter and all kinds of precision of hard gear.

本文直接从插齿刀与砂轮之间的相对运动关系出发，单独研究砂轮的运动，提出砂轮成形磨削点和砂轮成形磨削刃的概念；分别建立圆柱砂轮和圆锥砂轮磨削后硬齿面插齿刀的波形前刀面方程及空间切削刃方程；为便于比较何种情况下插齿刀的构形误差和切削角度能同时达到最优，分别对磨削五种不同硬齿面插齿刀所用的砂轮进行了廓形设计，并分析了插齿刀的构形误差和侧切削刃切削角度的分布规律；为插齿刀波形前刀面的磨削加工设计了相应的凸轮，用所设计的凸轮和近似的砂轮成功地制造出新构形法硬齿面插齿刀；最后进行插齿加工试验，检验新构形法硬齿面插齿刀的抗崩刃能力、耐磨性及被加工硬齿面齿轮的各项精度。

On the Basis of a great deal of experiments including specific grinding energy, roughness and endurance testing,the grinding performance s of different belts in domestic application while grinding 40Cr connecting rod of diesel engine are analysed.

在进行大量试验(包括比磨削能、粗糙度、耐用度)的基础上，分析了目前国内常用的三种强力砂带对磨削40Cr柴油机连杆的磨削性能，并推荐了磨削用量。

With the geometry model of the ball end mill, the method of theoretic cutting force analysis combined with the identification of the experimental coefficients of milling forces is used to develop the milling force model of a helical ball end mill.

给出了球头铣刀刃线几何模型，采用理论切削力分析与实验-系数识别相结合的方法，建立了新的螺旋刃球头铣刀的铣削力模型；建立了考虑刀杆柔性的球头铣刀铣削振动模型；考虑刀具动态变形和工件表面波纹对切削厚度的再生反馈，建立了球头刀铣削动力学模型，对动态铣削过程进行了仿真，证明离线仿真可以对铣削过程动特性做出准确的预测。

The downhole milling pipe string of screw drill tool will produce great reverse torque while milling and grinding the bridge plug, cement plug and so on, and which is extremely harmful to the screw drill tool .

针对螺杆钻具磨铣钻削井下桥塞、水泥塞及类似钻削工作中管柱在井下所产生的巨大反扭矩的危害，在对磨铣钻削管柱进行受力分析的基础上，提出了改进方案，即&井下防扭装置&和&磨铣钻削管柱的配置&，有效地降低了反扭矩带来的危害，改善了磨铣钻削管柱的受力状况。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。