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At first step, the processor before the deformable body contact the end face of cone die cavity regarded as an extrusion process. The minification of core boss's cross-section regarded as compressibility of direct extrusion, which acted as definition factor when construct the Direct Extrusion Model element. Another step, the model element of flat punch extrusion on wedge piece process was constructed when propose the process of deformable body overflow die corner. In this way the spherical end face of blank looked as cone end face one, t he approximate treatment is one of originality innovation in this paper. At last, the two elements have been connected and constructed the model element of cone boss part's deformation in the open die forging.
对于锥形凸台成形的第一个特征时段,即坯料和锥形凸台型腔的端面接触之前的变形过程,本文将凸台的截面缩小率转换成挤压成形的压缩率并以此为界定,建立了不同截面缩小率时的锥形模正挤压的模型单元;对于锥形凸台成形的第二特征时段即锥形模的角部充满过程,在详细考察锥形型腔端面对变形过程影响的基础上,将变形体的球形端面近似成锥面建立了平冲头挤压楔形体的模型单元;最后将前述两种模型单元有机连结,构建了开式模锻中整个锥形凸台成形过程的定量描述。
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On the basis of mastering the working principle of water-jet air splicer 4921A, this paper optimized allocation of its process parameter through orthogonal test which makes the knot-strength of all kinds of ply yarns reach the highest level.
在掌握 4 92 1A型喷水空气捻接器工作原理的基础上,运用正交试验的方法使空气捻接器的工艺参数优化配置,使得捻接结头强力达到最
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IN TWO long buildings in Carroll county, Indiana, some 8,000 pigs are doing what they do best: eating, defecating and squealing.
在印地安纳州卡洛尔县两座长型的养猪场内,大约8000头猪正做最擅长的事:吃喝,拉撒,哼哼乱叫。
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After analyzing the numerical simulation results of the impeller blade with different scale, and comparing the flow field distributing, then one kind of double-head anti-unsymmetrical S mode airfoils is found which is suitable to the normal and the reversed blowing for double directions under the design operating condition and which can also satisfy the requirement for the reversible axial flow fan in subway.
分析缩放比例不同的可逆式轴流风机叶型的数值模拟结果,比较各种叶型的流场分布规律,寻找到一种适合于设计工况下正、反双向吹风的双头双机翼反向不对称S型叶型,能够满足地铁用可逆轴流风机的要求。
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biter:咬人的动物
bitelephone | 头戴受话器, 头戴式耳机 双耳受话器 | biter | 咬人的动物, ** | bitermitron | 双端管(M型非重 入返波正交场放大管)