聚氨酯冲裁工艺是采用聚氨酯弹性体与金属模具相互作用,对板料施加冲切动作,从而得到冲孔件或落料件的一种工艺。设计了一套聚氨酯微孔阵列冲裁模具,将振动频率为40 k Hz的超声振动施加到冲头上进行冲裁实验,并对实验结果进行分析。通...聚氨酯冲裁工艺是采用聚氨酯弹性体与金属模具相互作用,对板料施加冲切动作,从而得到冲孔件或落料件的一种工艺。设计了一套聚氨酯微孔阵列冲裁模具,将振动频率为40 k Hz的超声振动施加到冲头上进行冲裁实验,并对实验结果进行分析。通过选取超声电源、设计超声波换能器、根据换能器、冲头的尺寸解析设计圆锥变幅杆,并使用ANSYS优化变幅杆结构进行超声辅助聚氨酯微孔阵列冲裁实验。结果表明:超声振动对材料的软化作用优化了冲裁过程,扩大了模具的工艺参数范围,使模孔深度对板料成形过程的影响减小,从而达到降低模具加工成本的作用。展开更多
The quality of a via hole on a multilayer stack of Low Temperature Co-fired Ceramic (LTCC) tape is of utmost importance to its functionality. This paper investigates a substitute for the commonly used circular shape h...The quality of a via hole on a multilayer stack of Low Temperature Co-fired Ceramic (LTCC) tape is of utmost importance to its functionality. This paper investigates a substitute for the commonly used circular shape hole to a more complex one and its implications when different parameters such as sheet thickness, punch speed, travel distance and tool clearance are?changed. Fabrication of the punch tools and the punching process is carried out at the same machine, ensuring alignment. Two types of non-circular shape are chosen to carry out the experiment. Pre-sintered complex shape hole measurements show that while punch conditions such as speed and tool gap have?little effect on the size, sheet thickness and travel depth play a vital role in the overall dimension. Albeit having only a slight effect on the size, those parameters are significant in other aspects of hole quality. Post-sintering investigation is also observed and discussed.展开更多
文摘聚氨酯冲裁工艺是采用聚氨酯弹性体与金属模具相互作用,对板料施加冲切动作,从而得到冲孔件或落料件的一种工艺。设计了一套聚氨酯微孔阵列冲裁模具,将振动频率为40 k Hz的超声振动施加到冲头上进行冲裁实验,并对实验结果进行分析。通过选取超声电源、设计超声波换能器、根据换能器、冲头的尺寸解析设计圆锥变幅杆,并使用ANSYS优化变幅杆结构进行超声辅助聚氨酯微孔阵列冲裁实验。结果表明:超声振动对材料的软化作用优化了冲裁过程,扩大了模具的工艺参数范围,使模孔深度对板料成形过程的影响减小,从而达到降低模具加工成本的作用。
文摘The quality of a via hole on a multilayer stack of Low Temperature Co-fired Ceramic (LTCC) tape is of utmost importance to its functionality. This paper investigates a substitute for the commonly used circular shape hole to a more complex one and its implications when different parameters such as sheet thickness, punch speed, travel distance and tool clearance are?changed. Fabrication of the punch tools and the punching process is carried out at the same machine, ensuring alignment. Two types of non-circular shape are chosen to carry out the experiment. Pre-sintered complex shape hole measurements show that while punch conditions such as speed and tool gap have?little effect on the size, sheet thickness and travel depth play a vital role in the overall dimension. Albeit having only a slight effect on the size, those parameters are significant in other aspects of hole quality. Post-sintering investigation is also observed and discussed.
