Study for Hybrid Finishing Apparatus for Manufacturing High Quality Gear

制造高质量齿轮的混合精加工设备研究

基本信息

批准号：
11650154
负责人：
HOYASHITA Shigeru
金额：
$ 2.24万
依托单位：
Saga University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2000
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11650154/
关键词：
Gear Surface Durability Tribology Shot Peening Process Barreling Process Surface Roughness

项目摘要

The new method of the tooth surface improvement in order to manufacture a high quality gear is developed when a shot peening process and a barreling process are continuously applied to tooth surfaces of a hardened and ground gear or a sheaved and hardened gear. The compressive residual stress induced on/below the gear tooth surface by the shot peening process increases the bending fatigue strength of the tooth root and the improvement of the surface roughness by the barreling process increases the surface durability (resistance for pitting, scoring and wear, etc.).In this study, the hybrid apparatus for finishing the ground tooth surface is designed and manufactured. This apparatus is a prototype one in order to investigate a performance of the tooth surface improvement. However, by some modification of design, one can easily design the apparatus established in a gear manufacturing process line for an automobile transmission, in which the processes of shot peening and barreling are con … More ducted at the same time, and many gears are barreled together. The cost will scantly increase by an addition of the processes of shot peening and barreling.Furthermore, a running test of high quality gears was conducted investigating the tooth profile, the surface roughness and the condition of the oil film formed between meshing gears. The processes of shot peening and barreling don't only restrict the gear with an involute curve, but also can be applied to all gears with an arbitrary tooth profile. A p* of Hypoid gears is ordinarily lapped after cutting and heat-treating. Since the time for lapping process is shortly a few to over ten minutes, the surface roughness is comparatively rough, for example as 5〜10 μmRy (≒1〜2 μmRa). Recently, the friction heat produced by the surface roughness becomes a question. For the sake of solving this problem the barreling process is effective.If the barreling process will be utilized as a last machining, the surface of the gear is not only smooth like a mirror, but also it can remove a burr and a protrusion around a scratch produced during machining. As a result, it will contribute to the quality control of the gear. The shot peening and barreling processes can decrease the friction coefficient by improvement of the surface roughness. If the load carrying capacity of gears will increase, the automobile transmission can be designed to a small size, and ultimately it will contribute to the saving of energy as an ecological gear. Less

当射击式过程和桶形过程不断地应用于硬化和磨碎的齿轮或紧身且硬化的齿轮时，可以开发出牙齿表面改进的新方法，以制造高质量的齿轮。通过射击过程在齿轮齿表面上诱导的压缩残留应力增加了牙齿根的弯曲疲劳强度，并且通过桶形过程改善表面粗糙度会提高表面耐用性（在这项研究中的粘贴，得分和磨损等）。在这项研究中，用于完成地面牙齿表面的混合装置。该设备是一种原型，以研究牙齿表面改善的性能。但是，通过对设计的一些修改，可以轻松地设计用于汽车变速器的齿轮制造工艺线上建立的设备，其中射击和桶形的过程被弄脏了……更加同时使用了管道，许多齿轮都被桶装在一起。通过添加射精和桶形的过程，成本将很大增加。Furthermore进行了对高质量齿轮的运行测试，研究了牙齿剖面，表面粗糙度以及在网状齿轮之间形成的油膜的状况。射击和桶形的过程不仅可以用影响曲线限制齿轮，而且还可以应用于具有任意牙齿轮廓的所有齿轮。切割和进行热处理后通常会打开一个p* p* p*。由于搭配过程的时间很快到十分钟以上，因此表面粗糙度相对粗糙，例如5-10μmry（≒1-2μmra）。最近，表面粗糙度产生的摩擦热成为一个问题。为了解决此问题，桶形过程是有效的。如果将桶形过程用作最后一个加工，则齿轮的表面不仅像镜子一样光滑，而且还可以去除毛刺和在加工过程中产生的划痕周围的划痕。结果，它将有助于齿轮的质量控制。射击和桶形过程可以通过改善表面粗糙度来降低摩擦系数。如果齿轮的负载承载能力将增加，则可以将汽车变速器设计成小尺寸，最终将有助于节省能源作为生态齿轮。较少的