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Development and Research on Injection Molding Plastic Gear with Positive Utilization of Injection Deformed Layer

积极利用注射变形层的注射成型塑料齿轮的开发与研究

基本信息

批准号：
18560148
负责人：
OHISA Tadayoshi
金额：
$ 2.42万
依托单位：
Miyagi National College of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18560148/
关键词：
Plastic Gear Injection Molding Molded Deformed Layer Gear Noise Gear Temperature Gear Profile Gear Wear Polyacetal Resign 動力試験騒音レベル微小硬さ試験機械要素静音性

项目摘要

The injection molding plastic gear needs to be a thin deformed layer in respect of gear intensity or it's life. However, the demand to low noise gear increases and development of the maintenance free gear is desired. The proposal of using positive deformed layer produced on an injection molding plastic gear from such a background is useful to the silence of an injection molding plastic gear. This research examined the noise and the wear characteristic of the gear made under various molding conditions in order to consider it as an aid of development of a plastic gear which was excellent in silence using a deformed layer positively. Two kinds of resin, polyacetal co-polymer and homo-polymer, were chosen as gear material, and the injection molding plastic gears were manufactured under various molding conditions. In order to clarify noise of these gears, the experiment by using a power absorption type gear testing machine was performed. By a series of experiments, the gear with thinner deformed layer thickness had the higher noise level, and the influence of the thickness of a deformed layer was accepted, and it was shown by the size of the load given to the gear in operation that the influence on a noise level and the amount of wear changed with differences of the hardness. Moreover, in the case of high load, the peak of the engagement frequency of the integral multiple which had appeared in early stages of operation shifted from those frequency. It was admitted from the microphotograph that the tooth profile had collapsed remarkably about these. Therefore, it is thought desirable to apply a deformed layer as a use of the gear used positively to the rotation transfer which applied load does not require in order to improve low noise. The precious data for contributing to the silence of an injection molding plastic gear by the above were able to be obtained.

注塑成型的塑料齿轮，无论是从强度还是寿命上，都需要有一层薄的变形层。然而，对低噪声齿轮的需求增加，并且期望开发免维护齿轮。在此背景下提出的在注塑齿轮上产生正变形层的方法，对注塑齿轮的消声具有一定的借鉴意义。本研究检查了在各种成型条件下制造的齿轮的噪声和磨损特性，以考虑将其作为开发塑料齿轮的辅助手段，该塑料齿轮积极地使用变形层，具有优异的静音性能。选择聚缩醛共聚物和均聚物两种树脂作为齿轮材料，在不同的成型条件下制备了注塑塑料齿轮。为了弄清这些齿轮的噪声，在功率吸收式齿轮试验机上进行了试验。通过一系列的实验，具有较薄变形层厚度的齿轮具有较高的噪声水平，并且变形层厚度的影响是可接受的，并且通过在操作中施加到齿轮上的载荷的大小表明，对噪声水平和磨损量的影响随着硬度的不同而变化。此外，在高负载的情况下，在操作的早期阶段出现的整数倍的接合频率的峰值从这些频率偏移。从显微照片上可以看出，牙齿轮廓在这些地方明显塌陷。因此，认为期望施加变形层作为主动地用于旋转传递的齿轮的用途，所述旋转传递不需要施加载荷，以提高低噪声。通过上述方法，能够获得有助于注塑塑料齿轮静音的宝贵数据。