定位销

The machined big locating hole and the raw 3-25H7 cylindriform dowel hole′s distribution circle get spheroidicity after the four over dowel holes on a kind of annular gear having been machined and given heat treatment.

在加工内齿圈上的四销过定位孔时，热处理后，已加工好的定位大孔及未加工的3-25H7圆柱定位销孔的分布圆均变成了椭圆形，安装时，又将它们撑起恢复成圆形。

During the mounting, the compinents unfurl them to retrieve circularity. The thesis will elaborate the programming method in how to use NUM System′N/C Center to machine and have process analyses on them with high precision on condition that the big locating hole and the 3-25H7 cylindriform ...

在没有将变形的定位大孔及3-25H7圆柱定位销孔分布圆恢复成圆形的情况下，在NUM系统的加工中心加工，对其进行的工艺分析和保证高加工精度的编程方法。

Use D2 steel or better on all cutting and forming sections with heavy usage. Provide kicker pins in punch sections and spring plungers in the stripper when necessary for positive strip removal. Each section is to be doweled separately.

对重载荷的冲裁及成型入子使用D2或更好的钢，当有必要正面移出时在冲头入子中提供推出销，在脱料板中提供弹簧定位销，每个入子都应该单独用销子结合。

Next, in order to ensure the process precision and production efficiency of boring machine tool ,the jig uses 'one surface-two sell' .the way of Clamps is hydraulic pressure clamping, which replaced by Manual clamping.

其次，夹具采用一面两销定位，保证了导管孔及气门阀座孔对定位销孔的位置精度。

During the process of camshaft measurement, the phase datum of the key pin or the locating pin can be determined precisely by using the minimum error method of curve symmetry and the cam nose position can be determined by using the minimum error method near the" sensitive point".

在凸轮测量中，采用曲线对称最小误差法，可精确确定键销或定位销的相位基准；采用&敏感点&附近最小误差法，可精确确定凸轮&桃尖&位置。

The setting plate 2 is provided with a setting hole 2h for aligning the axis of the piston P with the axis of the cylinder sleeve S, and the setting hole is engaged with the knock pin n of a cylinder block B.

该定位板2具有一个允许活塞P的轴线与气缸套S的轴线重合的定位孔2h。定位孔2h与缸体B上的定位销n相配合。

To cooperate with new and old parts: although standard zero, components, but in between interchangeable in assembly parts, and to make the optimal coordination between trim, still needs a lot of work, such as the gear and rack, boring if after removal of gear various performance indicators are used by detecting without the need to change, and to replace worn rack, rack and rack positioning pin hole on installation bolt holes and should be first, reoccupy hand crossed positioning drills and tapered reamer to match the drill and match hinge, and after the installation of new and old super-modulus gear mesh clearance to achieve technical standards, this work takes about one day.

。新，旧零部件重新配合过程：尽管标准零，部件间具有互换性，但在装配中，要使新旧零部件间的配合达到最佳状态，仍需大量的修整工作，如镗床的齿轮与齿条，若拆卸后齿轮的各项性能指标经检测尚能使用不需更换，而齿条磨损严重需更换，那么齿条及齿条安装面上的定位销孔和定位螺钉孔就需先划线定位，再用手电钻及锥形铰刀重新配钻和配铰，且新齿条安装完毕后与旧齿轮的啮合间隙需达到技术要求的标准，此项工作需时约一天。

To cooperate with new and old parts: although standard zero, components, but in between interchangeable in assembly parts, and to make the optimal coordination between trim, still needs a lot of work, such as the gear and rack, boring if after removal of gear various performance indicators are used by detecting without the need to change, and to replace worn rack, rack and rack positioning pin hole on installation bolt holes and should be first, reoccupy hand crossed positioning drills and tapered reamer to match the drill and match hinge, and after the installation of new and old super-modulus gear mesh clearance to achieve technical standards, this work takes about one day.

。新，旧零部件重新配合过程：尽管标准零，部件间具有互换性，但在装配中，要使新旧零部件间旳配合达到最佳状态，仍需大量旳修整工作，如镗床旳齿轮与齿条，若拆卸后齿轮旳各项性能指标经检测尚能使用不需更换，而齿条磨损厉害需更换，那么齿条嘉逸条安装面上旳定位销孔和定位螺钉孔就需先划线定位，再用手电钻及锥形铰刀重新配钻和配铰，且新齿条安装完毕后与旧齿轮旳啮合间隙需达到技术要求旳标准，此项工作需时约─天。

Main products: Pressure riveting screw, nut riveting pressure, pressure riveting nut -, Inserts into the nut, rose riveting nut, floating nut, ground-nuts, nut-squeezing, Spring screws, self-locking nut, positioning support columns, targeted marketing, sales support cards, in spring, the combination of screws, rivets hollow, as well as various Pressure riveting type of plastic fasteners, etc.!

主要产品有：压铆螺钉，压铆螺母，压铆螺母柱，镶入螺母，涨铆螺母，浮动螺母，接地螺母柱，挤压螺母柱，弹簧螺钉，自锁螺母，定位支撑柱，定位销，支撑卡柱弹簧销，组合螺钉，空心铆钉，以及各种塑料压铆类紧固件等！

Pin locators are to be recessed such that pins do not interfere with part orientation/location.

定位销要被隐藏起来，这样，定位销就不干扰到零件的定位取向/位置。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。