冲头

Based on the contacting characteristics of the surfaces in MEMS, we use the continuum contact mechanics modeling and fracture mechanics concepts to give a closed-form solution for the adhesion of the flat-ended wedges, including the atomic pressure distribution, the variations of the contact area and air gap with the load.

基于MEMS表面的接触力学特点，本文运用连续介质接触力学及断裂力学方法，研究了平底锥冲头的粘着接触问题，给出了接触区的原子压力分布、接触面积和表面间隙随载荷变化的封闭解。

The results show that, for the elasto-plastic contact of tip-substrate approach and separation process, the material plastic yielding in the atomic level is still governed by the von Mises criterion. For the adhesion of flat-ended wedges, continuum mechanics can be still applied down to a few lattice constants within the contact region, and give reasonable results, apart from the discrepancies near the contact edges. Moreover, adhesion hysteresis occurs during unloading due to the atomic steps, where the unloading curve does not coincide with the loading one. This in turn supports the presumption proposed by Pollock for the adhesion of stepped spheres.

本文首先对针尖—基体模型的弹塑性接触机理进行了深入研究，指出在原子水平上材料的塑性屈服仍由Von Mises准则控制；对平底锥冲头粘着接触的模拟表明，除了在接触区边缘附近有一定差别外，接触力学方法在接触区内几个晶格常数范围内仍能给出令人满意的结果；由于原子台阶效应，加载与卸载曲线不重合，出现粘着滞后，证实了Pollock关于具有纳米阶梯结构的球体粘着滞后现象的推测。

Forming positive pressure air distribution with mechanical punch, ensuring blister forming well, and could collocate exclusive Automatic Feeder. It could fit for the packaging of ampoule, needle, Xilin Bottle, big honey pill, medicine machine and some special shape etc.

正压空气成型加上配置机械冲头，确保了泡罩成型均匀挺括，适用于大密丸、医疗器械等较大尺寸或特殊形状物的包装；配以专用的自动加料器，能适应安瓿、针剂、西林瓶等的包装，适用范围广。

In the manufacturing of the lock plate as an important part placed in the crossing support device, we solved the problem of die breaking by using of stroke protecting device.

在交叉支撑装置中的另一个重要零件——锁紧板的制造工艺中，采用了冲头保护装置，解决了失稳折断问题。

The occurrence of wrinkling is attributed to the large die gap, which is the difference between the side length of the die cavity opening and the side length of the punch head.

出现的皱折是由于模具间隙大引起的；该间隙在模具腔口的侧面距离和冲头侧面距离之间有差别。

C. Hardened backing plates are required on all punch retainers and where stamps are used.

在所有冲头的固定器后以及压印的地方都要求是用热处理的垫板。

Hardened backing plates are required on all punch retainers and where stamps are used.

在所有冲头的固定器后以及压印的地方都要求是用热处理的垫板。

Bushings, Taper Block Sets, Injection Pins, Precision Milling Machine Accessories, Precision Grinder Accessories, Precision Mold Parts, Various Punch ...

衬套， 辅助器，精密铣床配件，精密磨床配件，精密模具零件，冲头。。。

Substantial for: drill, punch, tungsten steel cutter mold, stamping mold, deep drawing forming, watches shell, all kinds of knife, knife juice, stirring knives, razors, hair cutting knives, alloy knives, knife tablets, bearings, artificial joints, stamping die, gear, all kinds of precision steel parts, electronic components and automotive parts motorcycle piston ring and so on.

大量用于：钻头、冲头、钨钢刀具模具、冲压模、深拉成型、钟表外壳模具，各种餐刀、榨汁刀、搅拌刀、剃须刀、剪发刀、合金刀、刀粒，轴承、人造关节、冲压模具、齿轮、各种精密合金钢零配件，电子零件及汽车摩托车配件活塞环等。

The objective of this study was to analyze the square cup stretching process by using the dynamic explicit finite element analytical program, which was based on the Updated Lagrangian Formulation and elasto-plastic theory. Simulation results included the deformation and crack propagation history, the variation of the work piece thickness, the Forming Limit Diagram, and the relationship between punch load and punch stroke. A set of tools was designed for the square-cup stretching experiment to verify the reliability of the program.

中文摘要本文采用显性动态有限元素法，结合材料弹塑性理论，发展出一套三维增量型之有限元素分析程式，进行金属板材方杯拉伸成形制程及破裂之分析，并探讨方杯拉伸成形历程及裂纹成长历程、工件厚度变化、成形极限图(Forming Limit Diagram， FLD)，及冲头负荷与冲程关系，并设计一组方形冲模来进行方杯拉伸成形实验，以验证程式的可信度。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。