推导了两种典型双向曲度板和扭曲板的整体成形所需局部收缩量的计算公式。
Calculation formulae of local contraction amount of integral forming for two typical two-way curved plate and complicated curved plate are deduced.
但在成形过程中，壳体赤道环焊缝处极易向内收缩，从而引发该处的失稳起皱，严重影响了球形容器的质量。
But in the forming process, equator of the shell tends to withdraw inwards and therefore creates wrinkles here, which badly affects the quality of the vessel.
结晶性聚合物在SLS成形过程中存在较大的收缩变形，工艺较难控制，但此类材料韧性和强度很好，因此其SLS制造有巨大的发展潜力。
It is difficult to sinter part of crystalline polymer material by SLS for large deformation of crystalline material shrinking in the process.
当杆的断面收缩率比杯形部分断面收缩率大得较多时，不适合直接用复合挤压成形。
When the shrinkage of the rod fracture surface much more than that of the cup part fracture surface, its formation by compound extrusion is not applicable.
运用有限元工具，对影响中厚钢板热弯曲成形中冷却收缩的主要因素进行了有限元数值模拟。
With the finite element method, the main factors that affecting the cooling contraction of the bent steel plate of medium thickness are simulated.
为了成形大断面收缩率轴类零件，进行了楔横轧二次楔入试验。
For the sake of the axis accessory's figuration, the experiment of second wedge heavy section shrinkage was carried out.
随着炭黑含量的增加，成形坯体的线型收缩先减小后增大，坯体的强度则逐渐降低。
The linear shrinkage of green bodies showed an increase firstly but decreased with further increase in the carbon black content.
简述水火弯板成形原理，分析了曲板局收缩与整体成形关系确定的重要性，应用分段圆弧样条函数拟合曲板的辊轧线。
The principle of line heat forming of ship hull is described. The importance of determination of relationship between the local contraction of circular plates and the integral forming is analysed.
为了成形大断面收缩率轴类零件，进行了楔横轧二次楔入试验。
Experimental study on limit-section shrinkage of one wedge in cross wedge rolling;
为了保证精铸件的成形精度，制造所用的模具型腔必须对铸件的收缩变形进行补偿。
In order to ensure the forming accuracy of castings, it is necessary to consider the compensation for the shrinkages in the mould cavity for turbine blades brought by the solidification process.
为了保证精铸件的成形精度，制造所用的模具型腔必须对铸件的收缩变形进行补偿。
In order to ensure the forming accuracy of castings, it is necessary to consider the compensation for the shrinkages in the mould cavity for turbine blades brought by the solidification process.
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