论文部分内容阅读
五、在何种情况下滚刀需要对中在下列齿轮加工的情况下滚刀需要对中; 1.当被切齿轮的齿数较少,而滚刀安装后其径向跳动量又无法削减时,滚刀需要对中如图5g所示,轮齿两侧齿根处有明显高低不等,且右侧齿根处有根切现象,这种情况仅在滚刀顶刃左角处即在被切齿轮右侧齿根处进行切削时才会发生(见图6)。这时,此顶刃角处在与滚刀轴线垂直且通过被切齿轮中心的直线上,而距被切齿轮中心距离为最小。此时滚刀的几何轴心线处于其旋转轴心线的正下方,相距为e值,亦即是滚刀上最凸出刀齿的顶刃左角在切削齿轮上一个轮齿的右侧齿根的情况。被切齿轮的齿数越少,刀齿径跳量越大,这种根切现象也越显著。由图6可见,此时滚刀距对中位置相差半个顶刃宽度。在这种情况下,如滚刀处于对中位置上,就不可能产生图5g中的根切现象。
Fifth, under what circumstances the Hob needs to be centered in the following gear machining hob need to be centered; 1. When the number of teeth is cut gear less, and the hob after installation of its radial runout can not be cut , Hob need to be shown in Figure 5g, gear teeth on both sides of the root there is a significant range of different, and the root gear at the root cut phenomenon, this situation only in the top edge of the hob that is at Was cut when the tooth gear at the right side of the cut gear occurs (see Figure 6). In this case, the top edge angle is at a straight line perpendicular to the hob axis and passing through the center of the cut gear while the distance from the center of the cut gear is minimum. The geometric axis of the hob at this time just under the axis of rotation, the value of the distance e, which is the most protruding cutter hob top edge of the left corner of the cutter gear on the right side of a tooth Dental root situation. The less the number of teeth to be cut gear, the greater the amount of tool path jump, the more obvious this phenomenon of undercutting. Can be seen from Figure 6, at this time away from the center hob hob half of the top blade width. In this case, if the hob is centered, it will not be possible to produce the undercut in Figure 5g.