北京快乐8开奖

聚四氟乙烯板加工成型零件的方法

发布时间: 2016-01-06 01:46 作者: 浏览次数: 1126次 字号:

加工聚四氟乙烯板加工聚四氟乙烯板

零件毛坯采用20mm厚聚四氟乙烯板材,锯切成正四边形料,在普通车床上一夹一顶将聚四氟乙烯板车出外圆作为毛坯。最初工艺试验制定的工艺路线为:顶车外圆->粗车内型面->精车内型面->车另一端面->车成。各工序间,最后精车聚四氟乙烯板需工件充分冷却后再进行,工件装夹采用配车铜爪装夹,夹持力度很小,依靠手感达到最低限度满足车削要求。按此工艺路线加工后,工件没有满足要求,检测结果为:内底面平面度在0.35mm左右,外底面平面度在0.65mm左右,均为外凸面,底板厚度及形状不能满足要求,需控制内径尺寸203mm。加工中按上偏差控制,加工后仍超差0.10mm左右,主要由聚四氟乙烯板工件的圆度误差和锥度误差引起工件尺寸超差。

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