特型铰链冲压工艺与级进模设计

介绍了一种特型长度铰链生产的冲压工艺与级进模设计,对工艺和模具设计的要点及注意事项做了阐述。实践证明,方案可行,该工艺与模具可生产多种不同长度的铰链,为铰链生产提供了一种新的方案。     

基于AutoCAD的确定冲模压力中心的新方法

阐述了基于AutoCAD的确定冲模压力中心的方法———查询法 ,该方法理论严谨 ,结果准确 ,比原有的计算法和作图法简洁、快速 ,具有推广价值。     

SPCC板材冲压成形过程的数值模拟

应用abaqus显式求解的方法,对厚度为1.2 mm的SPCC板冲压成型过程进行数值仿真,最后得到其应力应变的分布规律,通过其后处理寻找到了塑性流动规律和板的厚度分布规律。为金属成型模具的设计提供了可靠的数据。     

冲裁模卸料弹性元件的选用和计算

介绍了适用普通圆柱螺旋压缩弹簧国标和聚胺酯弹性元件国标所给参数的弹性元件设计方法。并提出弹性元件的预压力大于卸料力，弹性元件最大压缩量小于弹性元件的最大许可压缩量，应作为冲裁模卸料弹性元件设计时的两个限制指标。     

An analysis of drawbead restraining force in the stamping process

A theoretical model based on the virtual work principle was proposed to calculate the restraining force produced by the drawbead located on a stamping die surface. In the theoretical model the deformation of the sheet metal drawn over the groove shoulder or bead is assumed to be subjected to bending, sliding and unbending processes, and only the sliding process is responsible for the frictional force. The governing equations derived from the theoretical model were solved by a numerical procedure. In order to validate the proposed model, the finite element simulations were also performed to calculate the drawbead restraining forces for various steels. The simulated results together with the experimental data obtained from the published literature were compared with the predicted values calculated by using the numerical procedure. The good agreement between the simulated results, experimental data and the calculated values justifies the proposed theoretical model.     

聚氨酯橡胶冲裁模试验研究

通过试验 ,电测记录了在聚氨酯橡胶通用冲裁模上进行薄料冲裁的实际冲裁力 ,并与经验公式计算值对比 ,得出了正确的计算公式和模垫单位压力值的选用范围 ,为简化计算 ,正确选用设备提供了依据     

Quality of Trimming and its Effect on Stretch Flanging of Automotive Panels

Traditional trimming requires accurate alignment of the die shearing edges, typically 5–10% of the blank thickness. Increasing the clearance above the recommended value often leads to generation of burrs on the trimmed surface. These burrs may create difficulties for flanging and hemming operations. Details of trimming technology for panels made out of aluminum sheet AA6111-T4 with elastic offal support will be discussed, including such factors as die radii of the tooling, effect of tooling wear, and trimming angle on the quality of trimmed surface. Also, imperfections on the trimmed edge of the panel may result in reduced formability in stretched flanging and hemming operations. Experimental results quantifying the behavior of trimmed surface in stretching will be provided for both a conventional trimming process and a newly developed process. This article was presented at Materials Science & Technology 2007, Automotive and Ground Vehicles symposium held September 16-20, 2007, in Detroit, MI.     

冲模维修存在的问题及其对策

通过模具生产中的实例，分析了产生问题的原因，并给出了改善对策，总结了模具维修中常见的问题及解决方法。     

冲模设计制造中的几点小经验

总结了冲模设计制造中的几点小经验，希望对模具行业的相关人士有一定的参考作用。     

后立柱外板冲压表面缺陷的产生原因及预防措施

针对EQ1060F系列三吨载货汽车的大驾驶室后立柱外板在冲压生产中经常出现的各种表面缺陷问题，具体分析了产生各种表面缺陷的原因，着重论述了应采取的预防措施。