成形的

In this paper,the effect of pre-stress on peen-forming is studied by experiments,the results show that pre-stress can change the relationship between pre-deformation and pre-stress shot peen deformation,and that 0.05%～0.1%pre-strain is comparetively suitable to improve the spanwise rectilinearity of shot peen-forming configuration surface.

文摘：对预应力喷丸成形进行了试验研究，指出预应力可以改变其对应的预变形与预应力喷丸变形之间的大小关系，在以改善喷丸型面纵向直线度为主要目的的预应力喷丸成形中，预应变取值0.5/1000～1/1000较为适宜。

Working out the shape of roughcast correctly according to a part can not only save material but also decrease the trimming workload and achieve the aim to reduce production cost and improve forming quality.

合理地计算出零件的毛坯形状，不仅能节省原材料，还能减少成形后工件的修边工作量，达到降低生产成本和提高成形质量的目的。

By means of schlieren method, experiments and analogdata technique, the phenomena and data in the process of PSFP are comprehensively observed, recorded, and analyzed. The dynamics and thermophysics characteristics of plasma jet and the powder in it are revealed. Also the impact of characteristics mentioned above on the precision, property and microscopic structure are studied.

结合纹影成像等测试方法，本文通过实验与数值模拟技术，全面考察、记录和分析等离子熔射成形过程的现象与数据，揭示等离子射流及射流中粉粒的动力学和热物理特性，并研究了上述特性对熔射成形零件精度、性能及微观结构的影响规律。

And the forming limit stress diagram which established with limit stress is independent on the strain paths and it is more convenient and practical to use as the criterion of forming limit under complex strain paths.

以极限应力构成的成形极限应力图不受应变路径的影响，作为复杂加载路径的成形极限判据更加方便和实用。

The results show that the integration of fluid mechanics models and finite eleme nt method is right, the forming limit of alumite LF6 can be raised effectively with hydro-mechanical deep drawing, and the drawing ...

结果表明，充液拉深流体压力作用与板料成形相结合进行数值模拟分析的方法是正确的，采用充液拉深工艺可以有效提高塑性差、难成形材料LF6的成形极限，拉深比可达到 2 。4。

In addition, using columniform punch and conical punch, different stress-strain distribution and thickness distribution at deformation region of flanging is compared.

本文的研究，丰富了板料冲压成形工艺中翻边工艺的内容和理论，可以为从事板料冲压成形工作的技术人员提供借鉴和参考。

Background— Mild commissural mitral regurgitation is associated with significantly higher restenosis-free surial after percutaneous mitral aluloplasty, which suggests that different mechanisms of significant MR after PM may hae different clinical courses.

背景：经皮二尖瓣成形术后严重高度非再狭窄存活率与轻度交界处损伤的二尖瓣关闭不全相关，表明经皮二尖瓣成形术后严重二尖瓣关闭不全的不同机制可能有不同的临床过程。

Background— Mild commissural mitral regurgitation is associated with significantly higher restenosis-free surial after percutaneous mitral aluloplasty, which suggests that different mechanisms of significant MR after PM may hae different clinica

背景：经皮二尖瓣成形术后严重高度非再狭窄存活率与轻度交界处损伤的二尖瓣关闭不全相关，表明经皮二尖瓣成形术后严重二尖瓣关闭不全的不同机制可能有不同的临床过程。

When analyzing wrinkling and fracture, it is found that the results of the simulation have a better consistency with the results of simulation using real drawhead than using equivalent drawbead of Dynaform. Furthermore, compared with simulation using real drawbead, simulation using equivalent drawbead spends less time on both computation and modeling.

在模拟软件Dynaform中，将建立的拉延筋阻力计算模型作为等效拉延筋使用，模拟分析了表盘座某部件的成形，在分析起皱、破裂等成形问题时，比使用Dynaform自带等效拉延筋更接近使用真实拉延筋模拟的结果，而且，比使用真实拉延筋模拟节省了计算时间及建模时间。

For spiral bevel gears' formate gear, using proper figurate cutting tool and generic CNC machining center, the gear's hard tooth-surface can be milled with high speed.

螺旋锥齿轮副的成形法大轮，利用合适的成形铣刀，在通用的立式加工中心上，可以实现热处理后硬齿面的高速铣削。

I bought a nice wrist watch as a surprise for my wife's birthday.

我买了一个漂亮的手表想要给我妻子的生日一个惊喜。

We don t expect students to be sponges. You can t expect to absorb everything and not have any questions to ask.

我们并不期待我们的学生是一块海绵，你没可能接收所有的东西而不提出任何问题。