外文翻译2yfd.pdf

A A FewFew PointersPointers forfor PickingPicking a a BestBest StampingStamping DieDie RobertRobert A A CapizzioCapizzio Senior Design Engineer Volkert Precision Technologies Inc Queens Village NY V It makes sense to stamp parts instead of machine them when production volumes are high and machining the parts would require multiple secondary operations Good candidates for stamping include parts such as ball bearing retainers grid cupsforcathode raytubes andpotentiometerand circuit breaker components These can be made from materials including aluminum exotic metals cold rolled and stainless steel and red metals such as copper brass beryllium copper phosphor bronze Process options involve traditional power presses with progressivedies multislidepressesrunningmultislide tooling or independent cam operated plunger presses with eyelet transfer tooling Selecting the correct process is critical for balancing economy and part quality Here are a few considerations to help select a stamping method ProgressiveProgressive diesdies produce finished flat formed and drawn parts by combining several operations in one die A strip of flat metal 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 the parts 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 a progressivedieaslongasthepartconfigurationsand tolerances remain acceptable Our company stamps materials as thick as 0 1875 in with this method But keep in mind it s sometimes necessary to perform a secondary press or machining operation to maintain a critical dimension that would otherwise be difficult to control in a die And for low production quantities it often makes sense to exclude a station because of tooling complexity In these cases finishing parts in a secondary operation makes sense even though it involves more labor It may also be necessary to exclude stations such as complex cam actuated stations or those performing in die tapping that require a lot of space because the die might become too long for the available presses MultislideMultislide toolingtooling is a good choice for complex parts with extensive bending operations that would be difficult to perform in a progressive die Multislide tooling is also good when parts are too costly to produce in single station hand fed tooling or call for cam actuated stations The multislide process involvesformingtoolsmovingfrommultipledirections Multislide tooling is less expensive and it produces parts with little or no scrap a significant factor with high volumes and specialmetals Multislidemachinescanaccommodate progressive dies to pierce holes notches or perform other operations before reaching the forming tools Production pricing is about the same for complex parts that could typically be made complete in either progressive or multislide tooling Variables include material usage and run rate Our company processes material up to 0 125 in thick and 2 in wide with a 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 saves considerable raw material Also process control is greater because each station is independent It s even possible to account for subtle changes in material properties to better maintain tolerances Punches in an eyelet machine are independently adjustable while progressive die punches are more difficult to adjust because they are mounted to a common holder Depending on the part complexity and the number of stations required the eyelet transfer method produces a finished part that requires no secondary operations In fact features such as side pierced holes or notches knife edges and coined edges or surfaces that would normally have required secondary press operations can be incorporated into the tooling The only limitations are part size and complexity material thickness and the number of stations available in the press Eyelettoolingshinesinadaptability Tooling modifications from a revised part are less costly than with the other methods This is particularly true when parts have the same shapes but vary in size It s easier to share tooling and produce only the necessary additional tooling The eyelettransfer method lets our company produce parts having a maximum depth and O D of 1 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multislide