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Results and Conclusion When the workpiece is of little elastic deformation, the discretization approach as proposed in this paper is appli- cable not only to the mathematical modeling for thread-cutting process, but to the modeling for processing simple workpiece by using complex cutter, and processing complex workpiece by using simple cutter.

结果和结论作者提出的离散化思路在工件弹性变形不大时，不仅适用于螺纹切削过程的数学建模，亦适用于其它复杂形状刀具加工简单形状工件和用简单形状刀具加工复杂形状工件时的数学建模。

Aim To exlore the method for describing cutter and workpiece, and the method for recording the shape and parameters of the cutting layer when complex workpiece is processed by using complex cutter, and to establish the math- ematical model for thread-cutting process.

摘 要：目的为了建立螺纹切削过程的数学模型，研究用复杂形状刀具加工复杂形状工件时，刀具和工件的描述方法以及切削层参数和形状的记录方法。

In actuator unit, the demand of parameters is analyzed, and it is brought forward that electric magnet is adopted as actuator, thermal resistance thread is adopted as cutter, and 5×5 cutter matrixes work synchronously for cutting the plastic film on each seedling.

在执行单元设计上，分析了其性能参数要求，提出利用电磁铁作为执行器，通电加热的电阻丝作为切破刀具，采用5×5的刀具矩阵同时动作使得电磁铁在动作时间内能处理每株棉苗上方的地膜。

Second, professional sales and wholesale Tool: 1, sales in Europe, the United States Kennametal to Scafa, Sweden Sandvik brand knives; 2, sales of Japan's Mitsubishi, Toshiba, Kyocera, Sumitomo brand knives; 3, sales Korea KORLOY, Taegu Tec, VKX thread cutter knife brands such as; 4, sales of Units turret system Mitsui, knives Units disk, Taiwan thread cutter knives.

销售欧，美国肯纳，以斯卡，瑞典山特维克品牌刀具；2、销售日本三菱、东芝、京瓷、住友品牌刀具；3、销售韩国KORLOY、特固克，VKX螺纹刀等品牌刀具；4、销售台制三井刀架，台制刀盘，台制螺纹刀等刀具。

Specifications Carbide Tool: milling cutter, Reamer, drill, drill centering, the ladder drill, drill Huo, an agent: an agent of Israel ISCAR Tool: OSG Tap Japan, Japan's Mitsubishi , An agent: ISCAR, SHOWA, NIKKEN processing center knife handle the Taiwan ANNWAY processing center knife handle a variety of imports TIALN coating alloy cutter (HRC72)-made: forming tools, complex tools, such as Non-standard alloy tool.

各种规格硬质合金刀具：立铣刀，铰刀，钻头，定心钻，阶梯钻，锪钻，·一级代理：以色列ISCAR刀具·一级代理：日本OSG丝锥，日本三菱，，·一级代理：ISCAR，SHOWA，NIKKEN加工中心刀柄·台湾ANNWAY加工中心刀柄·各种规格进口TIALN涂层合金铣刀(HRC72)·订做：成型刀具，复合刀具，等各种非标合金刀具。

Cutting Tools: Japan STK / SKL bit more milling cutter NACHI Fujio tap band saw, Taiwan CMT tungsten steel milling cutter, the United States QCT / LBK precision tungsten steel milling, lathe tool sunrox Taiwan Taiwan TPT SU bit, Japan OSG Babs big attack, nut tap rolling wheels, die dental regulation, die, tungsten wire attack, Toshiba, Sumitomo, Kyocera, Mitsubishi, Isca / Crowe according / Hitachi / Swiss Lamina blade.

切削刀 具：日本STK /SKL铣刀NACHI 不二越钻头铣刀丝锥带锯，台湾CMT钨钢铣刀，美国QCT/LBK高精度钨钢铣刀，，台湾三禄车刀，台湾苏氏TPT钻头，日本OSG大宝丝攻，螺帽丝锥滚丝轮，牙板牙规，板牙，钨钢丝攻，日本东芝，住友，京瓷，三菱，黛杰/伊斯卡/克洛依/日立/瑞士Lamina刀片。

The perfect CAD/CAM technology scheme for oblique tooth slotting cutter based on 3D feature modeling by SolidWorks and NC wire cutting is given,associated with ingenious application of double sine bar fixture,so the simplification of design and automation of manufacture for oblique tooth slotting cutter are realized,and the rapid response is potently guaranteed.

给出了完善的基于SolidWorks三维特征造型和数控线切割加工的斜齿梳齿刀CAD/CAM技术方案，辅以双正弦规夹具的巧妙应用，使设计简约化，制造自动化，为斜齿梳齿刀设计制造的快速响应提供了有效保证。

Dredger is a major kind of working ship,the cutter ladder is an important structure of the dredger,the design of cutter ladder has extreme sense.

挖泥船是工程船舶中的重要船型，绞刀架是挖泥船上的重要结构件，绞刀架设计方法的研究具有重要意义。

As a result of this section of the motor cutter, external oil pump, so as to effectively ensure the cutter of this subsection good ventilation cooling conditions, operational safety, long life.

由于本款裁断机的电机、油泵外置，从而有效保证了本款裁断机通风冷却条件好，运行安全，寿命长。

Does spiral movement synchronously,a nonlinear model was established by neural networks to describe the relationship between the helical groove and the milling cutter'sprofile,and according to the helical groove axial cross section to simulate the milling cutter's profile.

加工螺旋槽时，针对铣刀刃形的设计，应用包络面原理，采用神经网络方法建立了工件螺旋槽形与铣刀刃形之间的非线性关系模型，并通过工件螺旋槽端面截形模拟仿真出铣刀回转面刃形。

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。