刀具

Keywords valve set;valve guider;compound cutting tool;cutting parameter

气门座圈；气门导管孔；复合加工刀具；切削参数

The standard spindles have been used. The cutting tool is the compound twist drill, making the working procedure to be centralized.

主轴采用标准主轴，刀具选用复合麻花钻，使得工序集中。

In order to the working procedure to be centralized, the main spindles use the standard ones and the cutting tools are the compound twist drills.

主轴采用标准主轴，刀具选用复合麻花钻，使得工序集中。

Selection of lubricant, cutting tools, coolant, washing fluid etc.

新项目润滑剂、切削刀具、。

Moreover, the solutions to control rule and cutting tool management are presented.

同时，提出了任务调度规则和刀具管理的设计方法。

The AL-alloy deformation rule and the cutting force are studied in high-speed ball-end milling of curved surface; in this case, the cutting forces model is established by means of microelements. Through the theory analysis and experiment studies, the relationship of the curvature of machined surface and cutting forces is developed, and these establish the basis for choosing the tool path of high-speed cutting.

对高速铣削时铝合金材料的变形规律以及采用球头铣刀加工曲面时的切削力进行了研究；采用微元法建立了基于曲面加工的球头铣刀切削力模型；通过理论分析和实验研究建立了加工曲面曲率和切削力的关系，为高速切削刀具路径优选奠定了基础。

After around 100 years rapid development, with the advancement in CNC machine. CNC system , tool materials and coating technology, etc., modern cutting techniques has entered into a new stage of high-speed cutting which is characterized by 5-10 times increase of cutting speed.

现代切削技术经过近百年的快速发展，到20世纪末，随着数控机床、数控系统、刀具材料、涂层技术等制造技术的全面进步，达到了新的水平，使切削加工进入了高速切削的新阶段，其主要技术特征表现为切削速度有5～10倍的提高。

In accordance with the change pattern of the frequency composition of the cutting vibration signal and the phenomena during cutting, it has been discovered that there is a "micro-breakage stage"between normal wear stage and rapid wear stage of cutting tools with significant signal characteristics.

本文对车削加工中若干重要状态（即刀具磨损、破损和切削颤振等）的在线监测方法进行了理论探讨与实验研究。

Firstly the elastic stage of the cutting tool and workpiece in rectangular element is modeled and the relationship between the element node force and element node displacement also deduced.

首先选用矩形单元对刀具和工件弹性阶段进行有限元建模，得出其单元节点力和节点位移之间的关系，然后利用普朗特路斯方程，推导工件材料塑性变形时单元节点力和节点位移之间的关系，并指出金属由弹性变形到塑性变形时其单元刚度矩阵变化的规律，从而为实现金属切削过程的数值模拟提供可靠的理论基础。

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For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新