High Accurate Machining of Thin Wall Shape Workpiece by End Mill. Proposal of Twin Spindle Type Machining and Some Experiments.
High Accurate Machining of Thin Wall Shape Workpiece by End Mill. Proposal of Twin Spindle Type Machining and Some Experiments.
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DOI：
10.1299/kikaic.65.1719
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
H. Iwabe;Masaki Mizuochi;K. Yokoyama
中科院分区：
文献类型：
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作者：
H. Iwabe;Masaki Mizuochi;K. Yokoyama
由于薄壁工件由于切削力而产生的挠曲比厚壁工件的挠曲大得多，因此使用端铣刀对薄壁工件的侧面进行精密加工非常困难。然后采用小进给、小切深的常规切削条件，控制加工精度。但在这种情况下，不可能避免低生产率。因此，在本研究中，我们提出了一种新的切削方法，我们称之为双主轴型加工。通过这种方法，我们能够以高精度加工薄壁工件的侧面，同时确保高生产率。新的切削方法需要两个相同半径和螺旋角的端部米尔斯，但其中一个米尔斯应是右刃右螺旋刀具，而另一个应是左刃左螺旋刀具。在这种方法下，我们可以预期，薄壁工件由于切削力的偏转可以忽略不计，因为相同的切削力出现在壁面的两侧。研制了一台双主轴式切削加工的样机，并进行了实验.切削力和加工精度的测量结果证实了新的切削方法的效果。
It is very difficult to machine the side surface of a thin wall workpiece with precision using an end mill, because the deflection of the thin wall workpiece due to the cutting force is much larger than that of a thick wall workpiece. Then usual cutting conditions under low feed and small depth of cut are used in order to control machining accuracy. But it is impossible to avoid low productivity in this case. Therefore, in this study we propose a new cutting method, we call twin spindle type machining. With this method, we are able to machine the side surface of a thin wall workpiece with high accuracy, ensuring in the same time high productivity. The new cutting method needs two end mills of the same radius and helix angle, however, one of the mills should be right-edge and right -helix cutter while the other one should be left-edge and left-helix cutter. Under this method we may expect that the deflection of the thin wall workpiece due to the cutting force can be neglected because the same cutting force appears on the both sides of the wall surface. We produced a prototype equipment for twin spindle type machining and carried out some experiments. The effects of the new cutting method were confirmed by the results from cutting force and machining accuracy measurements.