削磨

Based on the foregoing analysis, the critical condition of realizing ductile/brittle transform is confirmed, and then, the model of ductile grinding of engineering ceramic is built.

以陶瓷材料压痕断裂力学、线性断裂力学和微观断裂物理学为理论基础，系统的分析和讨论了磨削加工过程中微裂纹的产生机理及其影响因素，建立了裂纹分布模型，并根据位错产生微裂纹机制，对磨削过程微裂纹的形成采用位错塞积模型来描述，从能量平衡的角度，讨论位错裂纹的稳定性与磨削应力的关系，确定了材料脆性去除和塑性去除转换的临界条件，最终建立以此为基础的工程陶瓷材料延性域去除模型。

From two to five chapter, there are mainly four research contents, which are the ultra-precision machining mechanism of engineering ceramic in the aspects of micro-scale and macro-scale, the key technology equipment, the ductile regime grinding experiments and surface quality of ultra-precision grinding. At last, there is a summary of the whole thesis.

第二章至第五章是本论文研究的主要内容，即工程陶瓷超精密磨削机理、超精密加工的关键工艺装备、超精密磨削的表面质量和延性域磨削实验研究四大部分，最后一章是全文总结。

Scrap carbide recycling: tungsten steel, tungsten alloy scrap, grinding materials, waste PCB drill bits, tungsten carbide tools, tungsten scrap powder, tungsten carbide powder, tungsten steel scrap, carbide grinding materials containing tungsten scrap, alloy grinding material, milling insert, drill bits, cutter, CNC cutter, wire cutting tungsten steel molds, drawing dies, round cut knife, saw blade, top hammer, PCB drill bits, V-CUT knives, knife handle, high proportion of alloy, non-magnetic alloys, tungsten carbide powder, tungsten wire cutter, such as tungsten tool steel scrap.

废硬质合金回收：钨钢、钨合金边角料、磨削料、废PCB钻头、钨钢工具、废钨粉、钨钢粉末、钨钢废料、硬质合金磨削料、含钨废料、合金磨削料、铣刀片、钻头、立铣刀、数控刀具、线切割钨钢模具、拉丝模具、圆切刀、锯片、顶锤、PCB钻头、V-CUT刀、锣刀、高比重合金、无磁合金、钨钢粉末、钨绞丝等各种钨钢废工具。

In ELID grinding, use imperceptible emery wheel to undertake grinding can obtain very low surface surface roughness, came true to written guarantee to steel of hard alloy exceed accurate mirror grinding.

在ELID磨削中，采用微细砂轮进行磨削可以获得很低的表面粗糙度，实现了对钢结硬质合金的超精密镜面磨削。

A precision solution of the moment of inertia of a lead screw's crosssection was obtained by interpolation polynomial and numerical integral method.

在精密长丝杠的磨削过程中，由磨削力、磨削热和砂轮磨损所引起的被加工丝杠的螺距误差已不可忽略。

Invar 36 is a kind of low expansion alloy, and it is difficult to machine because of its plastic, ductility and low heat conductivity. During Grinding, the part surface is easy to burn and wound for high grinding temperature and wheel adhesion.

Invar 36是一种低膨胀合金，其塑性大、韧性高、热导率低，磨削时所产生的磨削力大，磨削温度高，工件表面易于烧伤和划伤，对砂轮的粘附较严重，属于典型的难于加工材料。

The conventional grinding time is about 180 min/piece, and the qualification rate is 60 percent ; in the case of the flexible clamping, the grinding time is shortened to about 12 min/piece, and the qualification rate is improved to 98 percent.

在该磨削实例中，常规磨削的加工时间约为180分钟/件，合格率60%，而柔性装夹的加工时间约为12分钟/件，合格率98%，取得了非常不俗的实际磨削效果。

Thorough theoretical analysis and experimental study are needed for purpose of whole system info. It is a foundation of high speed grinding process technology.

对磨削机理和磨削加工工艺进行深入的理论分析和试验研究，以期形成较完整的理论体系，为高速磨削工艺技术研究提供基础。

As to the evaluation to the machining performance, more attentions have been paid on the wearability and removal rate of the brazing grinding tools.

并且在对加工效果的评价时，更多的是注重磨削工具的耐磨性和切除率，较少注意对磨削过程的监测和磨削机理的研究。

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。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐