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传统齿轮加工依赖于专用齿轮机床和专用齿轮刀具,小批量多品种齿轮加工时需配备多种齿轮刀具,且齿轮加工柔性差。针对这一问题,采用四轴卧式加工中心和棒铣刀,基于齿条刀具刀刃和齿轮廓线的共轭曲线理论,得到齿轮加工展成原理的数学模型,获得齿面形成的包络线。通过坐标变换,将复杂的包络线变换为棒铣刀的平移运动和齿轮的旋转运动,得到了一种由模数、齿数、齿宽、刀具半径参数驱动的柔性齿轮加工轨迹规划的方法,可实现不同模数齿轮的柔性加工。以直齿齿轮铣削试验为例,验证该轨迹规划方法的有效性。
Traditional gear machining relies on special gear machine tools and special gear cutting tools, small batch of multi-species gear processing need to be equipped with a variety of gear cutting tools, and gear processing flexibility is poor. In response to this problem, a four-axis horizontal machining center and rod milling cutter are used. Based on the conjugate curve theory of rack cutter edge and gear profile, the mathematical model of gear machining development principle is obtained, and the envelope of tooth profile . By coordinate transformation, the complex envelope is transformed into the translational motion of the milling cutter and the rotational movement of the gear. A method of trajectory planning for the flexible gear driven by the parameters of modulus, number of teeth, tooth width and tool radius is obtained. Can achieve different modulus gear flexible processing. Taking the spur gear milling test as an example, the validity of this trajectory planning method is verified.