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概述:当以高速铣削模式加工模具的口袋时,由于存在较高数量的切割材料,口袋狭窄区域或拐角处的刀具负载可能急剧增加。本文提出了一种考虑铣削力,加工工具和孔几何的摆线加工方法。首先提出了摆线加工中接合角几何建模的方法。分析铣削力的最大值和平均值;同时分析了摆线加工过程中铣削力曲线与啮合角曲线的对应关系。基于摆线加工的基础实验,获得了铣削力和刀具磨损的结果;然后提出了一种适用于空心摆线铣削加工的控制策略。基于用于摆线铣加工的控制策略,提出了腔摆线铣削加工的两种实现。最后进行腔体加工的比较实验。与进给率调节方法相比,摆线加工可以更好地控制铣削力和拐角处的狭缝和刀具磨损。铣削力和加工振动较小,刀具磨损明显降低。论文网

 

关键词:高速铣; 摆线加工; 铣削力

 

1.介绍

 

高速铣削在提高生产效率,加工精度,表面质量等方面提供了各种优势,已成功应用于模具行业,促进了其快速发展。 轮廓平行刀具路径是腔体模具的常见高速铣削方法,其中刀具路径通常基于轮廓偏移和交点计算。 然而,角部和狭窄区域(如狭槽)可能容易出现在轮廓之间。 如果不采取特殊处理,高速加工时常常会出现以下问题:(1)工具与未切割材料之间的接合角度或接合弧长度大大增加,导致接触材料急剧增加。 (2)刀具负载量在拐角或槽处可能高得多,导致刀具疲劳或损伤更大。 在高速铣削较硬的材料时,这些问题尤其严重。

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