螺旋平面齿轮剃齿加工及实验研究

发布时间：2018-06-16 03:46

本文选题：螺旋平面齿轮 + 剃齿加工　；参考：《西安工业大学》2017年硕士论文

【摘要】：螺旋平面齿轮传动是由渐开线螺旋小齿轮和螺旋平面齿轮啮合构成的一种新型的空逡逑间交错轴齿轮传动。由于螺旋平面齿轮传动具有重合度大、结构紧凑、较高的传动比、逡逑噪声低、小齿轮制造工艺成熟简单、承载能力强和传动平稳等优点,因此在不同工程领逡逑域中的应用越来越广泛。本文研宄的螺旋平面齿轮是应用于渔线轮内部的核心部件,经逡逑压铸制造而成,由于受模具的加工精度和热变形的影响,压铸制造的螺旋平面齿轮的表逡逑面质量不高。因此,本文提出了螺旋平面齿轮的剃齿加工方法,主要的研究内容包括以逡逑下几个方面:逡逑推导了假想的小齿轮刀具的齿面方程,根据微分几何与齿轮啮合原理,创建了螺旋逡逑平面齿轮的范成加工坐标系,通过坐标变换,求解了螺旋平面齿轮的齿面方程。根据螺逡逑旋平面齿轮齿根不产生根切和齿顶不变尖的条件,确定了螺旋平面齿轮的最小内半径和逡逑最大外半径。根据螺旋平面齿轮和渐开线螺旋小齿轮的齿面方程,通过数值计算求解了逡逑齿面上的离散点数据,将齿面离散点数据导入三维CAD软件中,建立了螺旋平面齿轮逡逑和渐开线螺旋小齿轮的精确的三维几何模型。逡逑根据空间交错轴啮合原理,提出了螺旋平面齿轮的剃齿加工方法。研宄了螺旋平面逡逑齿轮的剃齿加工原理,建立了螺旋平面齿轮的剃齿加工运动学模型。由渐开线螺旋小齿逡逑的齿面方程,给出了剃齿刀具的齿面方程。创建了螺旋平面齿轮的剃齿加工坐标系,逡逑求解了剃齿加工中切削点的相对运动速度,推导了剃齿加工螺旋平面齿轮的啮合方程和逡逑齿面方程。在渐开线螺旋小齿轮的齿面上开槽形成剃齿刀,研宄了剃齿刀容屑槽的开槽逡逑方式,设计了剃齿刀容屑槽的结构,实际加工制造出了剃齿刀。逡逑根据螺旋平面齿轮的剃齿加工原理,利用VERICUT软件进行了螺旋平面齿轮的剃齿加工仿真。设计了完整的螺旋平面齿轮剃齿加工仿真流程,利用三维CAD软件建立了加工仿真的剃齿机床模型、剃齿刀具模型和齿坯模型,并将其导入到VERICUT软件中。根据螺旋平面齿轮的剃齿加工运动关系,计算了剃齿加工仿真所需的刀位点轨迹,编写了相应的数控程序,加工仿真得到了螺旋平面齿轮的几何模型。仿真模型与理论模型相比较,工作齿面的偏差不超过9.8μm。根据设计的轴向开槽的剃齿刀,在CNC数控加工机床上进行了螺旋平面齿轮的剃齿加工实验。利用Infinite Focus光学3D测量仪,测量了压铸制造的螺旋平面齿轮和剃齿后的螺旋平面齿轮的表面粗糙度,实验结果表明剃齿后螺旋平面齿轮凹面的表面粗糙度降低到0.6311μm,证明了螺旋平面齿轮剃齿加工方法的正确性与可行性。
[Abstract]:Helical plane gear transmission is a new type of gear transmission with interlaced shaft between involute helical pinion gear and helical plane gear which is composed of involute helical pinion gear and helical plane gear. The helical plane gear transmission has the advantages of high coincidence, compact structure, high transmission ratio, low matching noise, mature and simple manufacturing technology of pinion gear, strong bearing capacity and stable transmission, etc. Therefore, the application in different engineering fields is more and more extensive. The helical plane gear studied in this paper is the core component used in the fishing line wheel. It is made by die-casting. Due to the influence of the machining precision and hot deformation of the die, the surface quality of the helical plane gear manufactured by die-casting is not high. Therefore, this paper puts forward the method of shaving helical plane gear. The main research contents include the following aspects: the equation of tooth surface of the hypothetical pinion cutter is deduced according to the principle of differential geometry and gear meshing. The machining coordinate system of spiral knuckle plane gear is established, and the tooth surface equation of helical plane gear is solved by coordinate transformation. The minimum inner radius and maximum outer radius of spiral plane gear are determined according to the condition that the root of spiral plane gear does not produce the root cutting and the top of the tooth is invariant. According to the tooth surface equation of spiral plane gear and involute spiral pinion gear, the discrete point data on tooth surface are solved by numerical calculation, and the discrete point data of tooth surface are imported into 3D CAD software. An accurate three-dimensional geometric model of helical plane gear and involute helical pinion is established. According to the meshing principle of spatial staggered axis, the gear shaving method of helical plane gear is put forward. In this paper, the principle of gear shaving is studied, and the kinematic model of gear shaving is established. Based on the tooth surface equation of involute helical small tooth, the tooth surface equation of gear shaving cutter is given. The shaving coordinate system of helical plane gear is established, and the relative velocity of cutting point in gear shaving is solved, and the meshing equation and the matching tooth surface equation of shaving helical plane gear are derived. A shaving cutter is formed by slotting on the tooth surface of involute spiral pinion gear. The grooving method of shaving cutter is studied, the structure of shaving cutter is designed, and the shaving cutter is manufactured. According to the gear shaving principle of helical plane gear, the gear shaving simulation of helical plane gear is carried out by using VERICUT software. A complete simulation flow of helical planar gear shaving is designed. The machine model of shaving machine, shaving tool model and tooth blank model are established by using 3D CAD software, and they are imported into Vericut software. According to the kinematic relationship of gear shaving, the cutter locus of gear shaving simulation is calculated, the corresponding numerical control program is compiled, and the geometric model of helical plane gear is obtained by machining simulation. Compared with the theoretical model, the deviation of the working tooth surface is not more than 9.8 渭 m. According to the axial slotted shaving cutter, the experiment of shaving helical plane gear was carried out on CNC NC machine tool. Using Infinite focus optical 3D measuring instrument, the surface roughness of spiral plane gear and shaved spiral plane gear made by die casting were measured. The experimental results show that the surface roughness of helical plane gear is reduced to 0.6311 渭 m after shaving, which proves the correctness and feasibility of the machining method of helical plane gear shaving.
【学位授予单位】：西安工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG618.1

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