齿轮

The determination of analysis and improvement scheme of structure defects in pipe cold-drawing machine

针对原半轴齿轮精锻模结构和生产中存在的问题，对半轴齿轮精锻过程进行了初步分析，提出了新的模具结构和半轴齿轮结构的改进方

Minitype rolling mill exploitation has gone to the lavatory for the experiment and scientific research have provided quite a few , the improvement the main body of a book has been carried out on present use rolling mill of precise copper of our university laboratory, has adopt gear wheel deflection falling-in way to have realized rolling mill controlling to rolling thickness , the rolling mill improving the day afer tomorrow has adopt three set of gear wheels to be engaged , two set of gear wheels axes among them may slide respectively along the erect sliding rail and the arc sliding rail , come true thereby to controlling rolling thickness.

小型轧机的开发为实验和科研提供了不少方便，本文对我校精密铜实验室现用轧机进行了改进，采用了齿轮变位啮合办法实现了轧机对轧制厚度的控制，改进后的轧机采用三组齿轮啮合，其中两组齿轮的轴线可分别沿竖直滑轨和弧形滑轨滑动，从而实现对轧制厚度的控制。

Keyword: crank press, crank slide block, the equipment of forging and stamping

电动机通过三角皮带把运动传给大皮带轮，再经过两级齿轮减速后把运动传给偏心齿轮，连杆的上端装在凸轮上，下端与滑块连接，这样通过连杆把偏心齿轮的旋转运动变为滑块的上下直线往复运动。

As a most essential driving part, gear is widely used in all kinds of machines in many important industrial fields.

齿轮是各类机械中应用极为广泛的重要传动零件，采用以净形或近净形为目标的精密锻造成形工艺生产齿轮件，适应高效、精密、绿色清洁的21世纪先进制造技术的发展趋势，成为未来齿轮加工变革的主要方法之一。

AGMA standard, built-in precision helical gearing consisting of a bull-gear and three individual pinion gears sized.

AGMA标准制造，精密制造的斜齿轮系由一个大齿轮和三个各自独立的小齿轮组成。

Basing on this mode and his two invention patents, chooseing ANSYS as platform and linking the important project of JiLin province Science and technology ministry 'cylindrical and cone spurgears rolling preform and extrusion precise forming equipment research and manufacture for automobile'(NO.20030311), the author made the finite element numerical simulation about elasto-plastic large deformation heat-force couping of rolling preform and stamping-extrusion and bulge-extrusion combining precise forming for spur gear', investigated qualitativiely and quantitatively on the gears formability for the environmental and the blank parameters , summarized some useful conclusions.

本论文是我的导师宋玉泉教授关于&塑性精密成形&研究方向的一个组成部分，按照他所提倡的&科、教、产一体化&培养模式，并以他的两项发明专利为依托，立足于以ANSYS软件为模拟平台，密切结合吉林省科技厅重点项目&汽车用圆柱圆锥直齿轮滚轧和挤压精成形设备研制&(批准号：20030311)和吉林大学超塑性和塑性研究所&直齿轮中试生产线建设&，开展了对&圆柱直齿轮滚轧制坯－镦挤、胀挤复合精成形&的有限元弹塑性大变形热－力耦合数值模拟，对环境参数和轧件内部的参数对制件成形性的影响进行了定性和定量的研究，总结了一些有意义的结论。

The paper transferring mechanism includes a drive gear coaxially coupled with a rotation shaft of a motor, a pick-up gear coupled with a shaft of a pick-up roller to separately feed the paper sheets, and a feed gear coupled with a shaft of a feed roller to outwardly transfer the paper sheets.

一种纸张传送机构，包括：与一电动机的旋转轴同轴耦连的驱动齿轮，与一拾取辊的轴耦连以分别供给纸张的拾取齿轮，与一送纸辊的轴耦连以向外传送纸张的送纸齿轮。

The pick-up gear is rotated when the motor is rotated in a first direction, the feed gear is rotated when the motor is rotated in a second direction, and the discharge gear is rotated constantly in one direction regardless of the rotation direction of the motor.

当电动机沿第一方向旋转时，拾取齿轮被转动，当电动机沿第二方向旋转时，送纸齿轮被转动，以及无论所述电动机的旋转方向为何，排纸齿轮恒定地沿一个方向旋转。

A typical lathe provides, through the feed rod, forty-eight feeds ranging from 0.002 inch to 0.118 inch per revolution of the spindle, and, through tne lead screw, leads for cutting forty-eight different threads from 1.5 to 92 per inch.

一些老式的或价廉的车床为了能够得到所有的进给量和加工出所有螺纹，必须更换主轴和变速齿轮箱之间的齿轮系中的一个或两个齿轮。

It can promote nontraditional finishings reasearch and application. Making further research on pulse electrochemical gear finishing and apply it in practice, it will improve the level of gear production in our country, produce a great effect on gear

进一步深入研究和完善脉冲电化学齿轮光整加工及其相关技术，掌握其规律并最终应用到生产实际中去，必将对我国齿轮的生产产生重大影响，提高我国齿轮加工的水平，带动相关行业的发展，产生重大的社会效益和经济效益。

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。