冲裁模冲出的零件毛刺大,毛刺分好多种,分别怎么解决?
不好意思我问的是零件产生毛刺,模具该如何维修。
推荐回答(3个)
你可以采用热能去毛刺,效率高,效果好.
热能去毛刺机技术是世界上一种新兴的去毛刺技术。
该设备的热能去毛刺过程是一种利用热化学反应过程。将所需去毛刺的零件,放在密封工作室内,然后充入一定量的氢气和氧气,经火花塞点火以后,混合气体在瞬间内反应,放出大量的热,使毛刺在高温(约3000℃),高压(充气压力的20倍),高速(8倍音速)作用下,加热自燃,而达到去毛刺的目的。因反应时间极短(仅0.003秒),所以加工后的零件原有尺寸,表面光洁度,金属组织及机械性能等基本没有变化。
由于气体的可达性好,无孔不入,故对形状复杂或手工难以去除毛刺的零件,如有内孔、交叉孔槽、盲孔等零件的毛刺具有独特的去除效果,该设备体积小、效率高(一个循环周期90秒)、去毛刺效果好,可满足大批量产需求,广泛用于机械、液压、气动、压铸、汽车、航空等领域.
敬请恕我直言!问题过于宽泛?回答比较困难!回答试试如下:希鉴谅!
[A]模具:a]优材质(先决条件):选择合金工具钢,如 Cr12,Cr12MoV,Cr6WV等.
b]热处理(必要条件):准确测量其加热与冷却温度,加热与保温时间.
加工前预先热处理:目的是去除材料内应力,甚至采用两级予先热处理(犹如国外"特级家俬"对所用木材的"烘干工艺"极其严格!并设专人负责操作).
加工后最终热处理:目的是确保模具硬度,韧性,耐磨性,稳定性(金相)
[B]缺陷:a]冲剪:剪刀刃口的磨制角度,硬度."定剪刀""动剪刀"装配精度.
b]冲压:凸模与凹模的刃口倒角的<角度>特别重要!倒角太锐易坏模具
; 倒角太大易出缺陷,
c]钢板:出厂钢板金相结构不容忽视(若铁素体+奥氏体为主则软易起刺)
冲件产品毛边很难解决的,主要是改善模具间隙和模具切合能力
对于有毛边的产品,依据品质的质量,可以分为
1:不超过料后的百分之一到百分之三的毛边,用钢丝刷都可以将毛边刷掉。
2:目视明显且有手感的毛边,需要用打磨机进行清除,但会造成产品侧边凹陷。
3:对于毛边要求不严格的,但会造成客户伤害的毛边,建议用简易压合治具将毛边压合到不伤害人的那面~
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