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螺纹铣削的常见问题及解决方法

发布时间:2013-08-08

在螺纹铣削加工中常见的一些问题及解决方法。以下是其中最突出的4种。
    (1)螺纹铣刀加速磨损或过度磨损
    ①原因:切削速度和进给量选择不正确。解决方法:确保从加工参数表中选择正确的切削速度和进给量。
    ②原因:刀具所受压力过大。解决方法:减小每齿进给量;缩短换刀时间间隔;检查刀具的过度磨损情况——起始处的螺纹将磨损得最快。
    ③原因:选用的涂层不正确,产生了积屑瘤。解决方法:研究其他涂层的适用性;增大冷却液流速和流量。
    ④原因:主轴转速过高。解决方法:降低主轴转速。
    (2)切削刃崩刃
    ①原因:切削速度和进给量选择不正确。解决方法:确定从加工参数表中选择正确的切削速度和进给量。
    ②原因:螺纹铣刀在其夹持装置上发生移动或滑移。解决方法:采用液压夹头。
    ③原因:加工机床刚性不足。解决方法:确定工件夹持可靠;如有必要,重新夹紧工件或提高夹持稳定性。
    ④原因:冷却液压力或流量不足。解决方法:增大冷却液流速和流量。
    (3)螺纹牙型上出现台阶
    ①原因:进给率过高。解决方法:减小每齿进给量。
    ②原因:斜坡铣的加工编程采用轴向运动。解决方法:确保螺纹铣刀在螺纹大径处铣出牙型曲线,而不会作径向移动。
    ③原因:螺纹铣刀过度磨损。解决方法:缩短换刀时间间隔。
    ④原因:刀具加工部位与夹持部位相距太远。解决方法:尽可能缩短刀具在夹持装置上的悬伸量。
    (4)工件与工件之间检测结果存在差异
    ①原因:刀具加工部位与夹持部位相距太远。解决方法:尽可能缩短刀具在夹持装置上的悬伸量。
    ②原因:选用的涂层不正确,产生了积屑瘤。解决方法:研究其他涂层的适用性;增大冷却液流速和流量。
    ③原因:螺纹铣刀过度磨损。解决方法:缩短换刀时间间隔。
    ④原因:工件在夹具上移位。解决方法:确定工件夹持可靠;如有必要,重新夹紧工件或提高夹持稳定性。



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