关 键 词：

汽车 灯架 成形 模具设计 图纸

资源描述：

喜欢这套资料就充值下载吧。。。资源目录里展示的都可在线预览哦。。。下载后都有，，请放心下载，，文件全都包含在内，，【有疑问咨询QQ:1064457796 或 1304139763】 ==================================喜欢这套资料就充值下载吧。。。资源目录里展示的都可在线预览哦。。。下载后都有，，请放心下载，，文件全都包含在内，，【有疑问咨询QQ:1064457796 或 1304139763】 ==================================

内容简介：

A A FewFew PointersPointers forfor PickingPicking a a BestBest StampingStamping DieDieRobertRobert A.A. CapizzioCapizzioSenior Design EngineerVolkert Precision Technologies Inc.Queens Village, NY,VIt makes sense to stamp parts instead of machine them whenproduction volumes are high and machining the parts wouldrequire multiple secondary operations. Good candidates forstamping include parts such as ball-bearing retainers, gridcupsforcathode-raytubes,andpotentiometerandcircuit-breaker components. These can be made from materialsincluding aluminum, exotic metals, cold rolled and stainlesssteel, and red metals such as copper, brass, beryllium copper,phosphor bronze.Process options involve traditional power presses withprogressivedies,multislidepressesrunningmultislidetooling, or independent-cam-operated plunger presses witheyelet-transfer tooling. Selecting the correct process iscritical for balancing economy and part quality. Here are a fewconsiderations to help select a stamping method.ProgressiveProgressive diesdies produce finished flat, formed, and drawn partsby combining several operations in one die. A strip of flatmetal enters the die and is fed through one station at a time.Each station forms or cuts a particular feature such as a bend,notch, or hole. When the strip reaches the last station, theparts are complete and the tool cuts them free from the strip.One drawback: remaining scrap can reach up to 50%.Anycombinationofoperationssuchasnotching,forming,coining, tapping, and assembly can be designed into aprogressivedieaslongasthepartconfigurationsandtolerances remain acceptable. Our company stamps materials asthick as 0.1875-in. with this method.But keep in mind its sometimes necessary to perform asecondary press or machining operation to maintain a criticaldimension that would otherwise be difficult to control in a die.And for low production quantities, it often makes sense toexclude a station because of tooling complexity. In these cases,finishing parts in a secondary operation makes sense, eventhough it involves more labor. It may also be necessary toexclude stations such as complex cam-actuated stations or thoseperforming in-die tapping that require a lot of space becausethe die might become too long for the available presses.MultislideMultislide toolingtooling is a good choice for complex parts withextensive bending operations that would be difficult to performin a progressive die. Multislide tooling is also good when partsare too costly to produce in single-station hand-fed tooling,or call for cam-actuated stations. The multislide processinvolvesformingtoolsmovingfrommultipledirections.Multislide tooling is less expensive and it produces parts withlittle or no scrap, a significant factor with high volumes andspecialmetals.Multislidemachinescanaccommodateprogressive dies to pierce holes, notches, or perform otheroperations before reaching the forming tools. Productionpricing is about the same for complex parts that could typicallybe made complete in either progressive or multislide tooling.Variables include material usage and run rate. Our companyprocesses material up to 0.125-in. thick and 2-in. wide witha multislide method.Eyelet-transferEyelet-transfer toolingtooling is primarily for deep-drawn parts.These are transferred from station to station by fingers,instead of a carrier strip as with progressive dies. This savesconsiderable raw material. Also, process control is greaterbecause each station is independent. Its even possible toaccount for subtle changes in material properties to bettermaintain tolerances.Punches in an eyelet machine are independently adjustable,while progressive-die punches are more difficult to adjustbecause they are mounted to a common holder. Depending on thepart complexity and the number of stations required, theeyelet-transfer method produces a finished part that requiresno secondary operations.In fact, features such as side-pierced holes or notches,knife-edges, and coined edges or surfaces that would normallyhave required secondary press operations can be incorporatedinto the tooling. The only limitations are part size andcomplexity, material thickness, and the number of stationsavailable in the press.Eyelettoolingshinesinadaptability.Toolingmodificationsfrom a revised part are less costly than with the other methods.This is particularly true when parts have the same shapes, butvary in size. Its easier to share tooling and produce only thenecessary additional tooling. The eyelettransfer method letsour company produce parts having a maximum depth and O.D. of1.5 in.几种挑选最佳模具的方法几种挑选最佳模具的方法RobertRobert A.A. CapizzioCapizzio高级设计工程师福尔克特精密技术有限公司Queens Village,NY,V在机器加工零件产量高的时候， 从多个辅助操作中进行部分简化是非常有必要的。包括选取较好的冲压部件，如球轴承的保持器，网格杯用于阴极射线管，和电位器和断路器组件。这些的材料有铝，特殊金属，冷轧和不锈钢，包括红色金属如铜，黄铜，铍铜，磷青铜等。可处理对象包括传统的动力压力机， 多画面幻灯片印刷机运行多画面工具的级进模， 独立的凸轮式柱塞压力机孔传输工具。选取正确的方法是获得经济与质量之间最佳收益的关键。 这里有几个注意事项， 可以帮助我们选择最佳冲压方法。级进模生产成品， 在一个模具内分成几个操作。一条平整的金属进入模具一次通过一站。每个站用特定的方式进行成型如弯曲，缺口或者钻孔。当产品到达最后一站的时候留下的是成品和用工具切削下来的废料。一个缺点：剩余的废料可以达到50%。一个级进模可以设计成任意组合如开槽，成型，压印，攻丝和装配操作。 只要配置和公差符合标准。我们的公司印章就是用这种方法做的，材料厚为0.1875（mm）但请记住， 有时候需要按次执行和加工操作的维护，否则这个模具很难控制关键尺寸。 因为模具的复杂性拆除一站而降低生产量往往是有道理的，在这些情况下， 整理部件的二次操作也是有意义的即使它涉及了更多的劳动。也有些是必要的排除工作站， 如复杂的凸轮制动站和型模攻丝间需要足够的空间，因此模具需要的时间可能会变得太长。将很难在级进模进行的复杂零件广泛需要的弯曲操作在multislide模具执行是一个不错的选择。当零件成本太高如生产单台手工工具或拨打凸轮驱动站用multislide模具也不错。该multisl