冲裁模刃口尺寸及公差的自动标注与修改

根据冲裁模刃口尺寸及公差的确定原则和计算公式 ,提出了切实可行的人机交互式的自动标注和修改冲裁模刃口尺寸及公差的方法     

Cr12MoV模具钢堆焊工艺及组织研究

研究了Cr12MoV模具钢堆焊工艺,对堆焊接头组织形貌分析和显微硬度测定表明,堆焊层具有高硬度,热影响区中的白亮带为残余奥氏体,它有利于缓解热应力。     

非轴对称腰鼓形零件闭式反向挤压工艺试验研究

此文介绍了非轴对称腰鼓形零件——水阀手柄闭式反向挤压模具的水平可分凹模结构设计及成刑试验工艺过程,为类似零件的锻压成形提供了成功的实例。     

锤锻模型槽布置与模块尺寸确定CAD

介绍了锤锻模型槽布置和模块尺寸确定的计算机辅助设计方法,以平衡重锻件为例,给出了计算机辅助设计的结果。     

DIE‐OFF OF PATHOGENIC E. COLI O157:H7 IN SEWAGE CONTAMINATED WATERS1

E. coli O157:H7 is a pathogen that can be present in sewage contaminated waters. This organism poses a health risk for humans who come in contact with these waters via drinking, swimming, or shellfish consumption. A risk assessment model is needed to evaluate or quantify this risk. One possibility is the use of a computer model to simulate the fate and transport of E. coli O157:H7 downstream from a discharge point [e.g., a separate sanitary sewer overflow (SSO)]. However, this computer model would require input data regarding characteristics of this organism, which have not been previously available. One necessary input parameter is the rate at which die off of this organism occurs in a stream or river environment. Several studies were conducted to evaluate the die‐off rate of E. coli O157:H7 in an SSO impacted stream. Indicator bacteria (total coliforms, E. coli, and enterococci) were evaluated simultaneously. The results suggest that E. coli O157:H7 is not persistent — decay rates are high relative to the indicator bacteria. However, the decay plots suggest a biphasic response: initial decay is rapid, followed by an attenuated, slower decay. Hence traditional simulation methods using a single, first‐order decay rate may be inaccurate.     

摆动辗压模具的材料选择

分析了摆辗模具的工作原理、失效形式 ,合理地选择材料及制定热处理工艺 ,可以大大提高模具寿命     

整流器成形工艺和模具设计

球形件成形中最困难的问题是口部起皱和底部破裂 ,通过制订合理的成形工艺 ,将变形量分解和降低到最小程度 ,巧妙地解决了球形件成形中的难题。     

内接头锻件成形工艺分析与模具设计

提出了采用预成形和正反挤成形生产内接头新工艺 ,通过有限元模拟和分析确定了合理的预制坯形状和尺寸 ,设计了内接头预成形和正反挤成形模具。     

阶梯件拉伸挤压复合模设计

通过分析零件的工艺特点 ,设计了拉伸挤压复合模 ,不仅可提高零件质量 ,而且可提高生产效率。     

摩托车棘轮起动齿轮冷挤压齿工艺及模具设计

摩托车的棘轮、起动齿轮是起动器的重要组成部分,其制造精度高,工艺复杂。此文从工艺性分析、坯料选择、设备选型等方面阐述了两齿轮冷挤压齿成形工艺,对冷挤压模具结构、齿模设计补尝作了详细介绍。