Abstract
According to the theory and machining principle with disc milling cutter of the equal-base circle bevel gear, the mathematical model of disc milling cutter is established, the principle of machining equal-base circle bevel gear with disc milling cutter is analyzed, and the design methods of axial section profile and the parameters of disc milling cutter are studied, respectively. The reason of interference between the disc milling cutter and tooth surface during machining is studied, based on the tool motion analysis. According to the coordinate change of cutter axial section in the cutter rotation movement and the corresponding rule of coordinate between the cutter surface point and the corresponding point on tooth surface, the internal interference mechanism is analyzed. For the overcut interference in machining movement, a judgment method is proposed based on the rotation and comparison of cutter axial profile coordinates. Finally, through the processing experiment, the reasonable selection method of design parameters and the validity of judgment method are verified.
Highlights
In power generation, shipping, mining, and other important fields, super large bevel gear is the core component of large equipment
If the tool diameter is too small, the tool strength, the manufacture, and installation of the tool bar will be affected. How to design this disc milling cutter reasonably is one problem that must be solved. erefore, this paper studies the design method, design steps, and key design points of the disc milling cutter in detail and puts forward the overcutting interference inspection method, which provides the basis for the design of the disc milling cutter
Tooth profile modification is realized by axial section profile modification, and the tool profile is modified in parabola form. e modification center is selected on the reference circle of equivalent gear, and the modification quantity is measured in the circumferential direction and only for the segment above E point. e profile of the modified tool is ABCE D′, and the modification quantity sk at radius rk is sk sk0 l2k0 rv −
Summary
In power generation, shipping, mining, and other important fields, super large bevel gear is the core component of large equipment. Cui et al [6] deduced the offset curves equation of the tooth line and analyzed the geometric structure characteristics, machining methods, and tool design of the equal-base circle bevel gear. Zhang et al [10] researched deeply on the theory of two-axis CNC machining of equal-base circle bevel gear On this basis, a large size of equal-base circle bevel gear was machined with finger milling cutter. Due to the particularity of equal-base circle bevel gear and the novelty of this machining method, the existing gear cutting tools cannot be used for the machining; the disc milling cutter used in this method needs special design. Erefore, this paper studies the design method, design steps, and key design points of the disc milling cutter in detail and puts forward the overcutting interference inspection method, which provides the basis for the design of the disc milling cutter. “Reasonable Design of Diameter” analyzes the internal mechanism of the interference between the cutter and the tooth surface and proposes an interference judgment method to judge the rationality of the diameter parameter
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