半顶角

半顶角大于60°锥形封头的可行性研究

Study on feasibility of conical head with half top angle > 60 °

而当H在实用范围内，特别是对于表面发射率较低的短圆柱空腔和半顶角较大的圆锥空腔而言，两种方法得到的ε~c值是不同的。

In other words , the differences in the values of ε for two methods are evident in the H range of practical application , especially in the following cases : smaller values of surface emittance ; shallow cylindrical cavities and conical cavities with larger half-angles .

料斗半顶角由实际物料和料斗材料确定。

The half vertex angle was determined by particulate solid and hopper materials .

指出在一定半顶角下设计的标准整体流料仓，只适用于很小一部分粉体物料。

The ' standard ' massive flow silos designed with certain half vertex angle was only suitable for a little part of particulate solid .

本文就板料零件数控渐进成形工艺的成形过程、变形机理、极限半顶角等方面进行了探讨。

In this paper , the forming principle of NC incremental sheet metal parts forming process , the ultimate half-apex are presented , and so on .

结果表明，半顶角对制件厚度变化起主导作用，其值越小，厚度减薄越严重；

The results show that half-apex angle has a great effect on sheet thickness distribution , the smaller the half-apex angle is , the bigger the sheet thickness thins ;

建立了数学模型，通过数值求解得到了散流器在不同半锥顶角下的射流轨迹，分析了锥体顶角对射流的影响，建议锥体顶角为110°～130°。

Develops a mathematical model . Obtains the jet path of a diffuser with different half cone vertex angles by numerical solution . Analyses the influence of cone vertex angle on jet , and recommends the desired cone vertex angle of 110 °~ 130 ° .