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作者：佚名 论文来源：在职教育交流中心 点击数： 更新时间：2007-5-18 |
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拉拨过程中影响冷拉拨淬火钢丝机械性能的探讨
模具几何尺寸淬火冷拉钢丝机械性能的影响
摘要：
通过对Wisterch参数，钢丝与模具接触长度、定径带长度、工作锥角度的研究得到了在不同拉拨条件下模芯采用的最佳几何尺寸，并研究最佳工作锥角、定径带长度下钢丝在模具中的发热量、空气中散热量、卷筒上的散热量及其模具散热量的不同，导致钢丝进出模具的温度差别对钢丝机械性能的影响，在实验中根据同种拉拨条件下采用不同工作锥角半角、定径带长度进行试验，得出结论，工作锥角越大则钢丝与模具接触长度越短，钢丝变形越剧烈，在模具中发热量就越高，导致钢丝出模温度高，使钢丝强度、硬度升高，弯曲、扭转次数降低，并且降低模具使用寿命。在其它条件相同的情况下，定径带越长则钢丝与定径带简壁磨擦增大，使钢丝发热量加大，从而使钢丝强度、硬度略升高，弯曲扭转次数略降低但定径带的增大减小了钢丝变形产生的弹性后效使钢丝出模直径比较稳定。
关键词：模芯、 几何尺寸、机械性能
Summary:
Pass to count to Wisterch parameter , and the steel wire is different from the molding tool get in touch with the length, and settle the path the research taking the length work the stabber angle to get under differently pull to stir the term, mold core adoption of best severally why size, combine the best work stabber of research the Cape, and settle the path to take the length nextly steel wire is in the molding tool of have fever to measure, air inside dispel-heat calories, winding dispel-heat on the coil-canister , and its molding tool dispel-heat calories of, and cause the steel wire the temperature difference pass in and outing the molding tool to influence steel wire machine function, under the experiment inside pull to stir the term according to the same race different work stabber Cape half of adoption the Cape(7 degree,10 degree,12 degrees, the best mold Cape, experience mold Cape) settle the path to take the length(2-3 mm,3-4 mm,4-5 mms, theories length, experience length) to proceed to experiment, and get the conclusion, work stabber the Cape then is more big the steel wire get in touch with the length with molding tool more short, the steel wire transform more violent, have fever to measure in the molding tool more high, under same alike cool off the term the steel wire enter the mold temperature to go up, and cause the steel wire to out the mold temperature to is high, and make the steel wire the strength, degree of hardness go up, flection, distort the number of times to lower, and lower the molding tool service life.In the aggrandizement that circumstance of same alike other term, settle the path to take more long then steel wire with settle the path to take the Chien's wall to rub to enlarge, make the steel wire to have fever the deal enlargement, from but make the steel wire the strength, degree of hardness go up slightly, and the flection turn round the number of times to slightly lower to cause the molding tool to wear away the enlargement, let up the molding tool service life, but settled the path to take to let up the steel wired to transform the output flexibility the empress domino offect to make the steel wire outs the mold diametered to compare the stabilitied.
Key Words: Mold core several why size machine function
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