热缩刀杆装夹温度的影响因素

发布时间：2018-08-27 12:21

【摘要】：为得到热缩刀杆与刀具配合公差与其最小装夹温度之间的精确关系,对影响刀杆接触面最小热位移差值的感应加热长度、热缩刀杆壁厚、锥角、配合长度、内径等因素进行了研究。采用ANSYS参数化设计语言,构建具有过盈特征的刀杆与刀具配合的参数化有限元模型,通过试验验证了模型的可靠性。通过获取热缩刀杆接触面的位移分布,结合刀杆与刀具接触状态的表征方法对接触面上最小热位移差值进行了计算。计算结果表明,配合面最小热位移差值随着热缩刀杆壁厚、配合长度、锥角的增加而减小,随着内径的增大而增大,且适当增大感应加热长度也有利于刀具的装夹。最终建立了配合公差所对应的过盈量?与最小装夹温度T之间的计算关系式,对刀具在热缩刀杆中的装夹及刀杆的结构设计提供理论指导。
[Abstract]:In order to obtain the exact relationship between the tolerance of the fit between the shrunken cutter and the minimum clamping temperature, the induction heating length, the wall thickness, the cone angle and the matching length of the heat shrinkage cutter rod, which affect the minimum thermal displacement difference of the cutter rod contact surface, are studied. The inner diameter and other factors were studied. A parameterized finite element model with interference feature is constructed by using ANSYS parametric design language. The reliability of the model is verified by experiments. By obtaining the displacement distribution of the contact surface of the shrunken cutter rod and combining the representation method of the contact state between the tool rod and the cutter, the difference of the minimum thermal displacement on the contact surface is calculated. The results show that the minimum thermal displacement difference decreases with the increase of the thickness of the wall, the length of the fit and the angle of the cone, and increases with the increase of the inner diameter, and the proper increase of the induction heating length is also beneficial to the clamping of the cutter. Finally, the interference amount corresponding to the tolerance is established. The relationship between the formula and the minimum temperature T provides theoretical guidance for the clamping of the cutter in the hot shrinkage cutter rod and the structural design of the tool rod.
【作者单位】：湘潭大学机械工程学院;
【基金】：国家自然科学基金(51375418,51375419,51275436) 湖南省自然科学基金(12JJ8015、13JJ8007) 湖南省高校创新平台开放基金(13K040) 深圳市科技计划(JCYJ20160415114050831)资助项目
【分类号】：TH16

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