Development of the Teaching Method using the work sound which assists the manufacturing learning on Technical education

开发利用工作声音辅助技术教育制造学习的教学方法

• 批准号: 14580304
• 负责人: NAGATOMI Kazuyuki
• 金额: $ 1.73万
• 依托单位: University of Miyazaki
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14580304/
• 关键词: Technology Education; Manufacturing; Working sound; Handsawing; のこぎり; のこぎりびき音

In order to obtain the basic data for improving the method of guidance in the technology education of a junior high school, the relationship between the skill level of handsawing and the features of handsawing sound was examined. The results are summarized as follows :1)The waveform by which a beautiful gourd-shaped is repeated is the feature of an expert's handsawing sound.The amplitude level of the sound at "operation which pulls a saw" is high as compared with 'operation which returns a saw". This is compared to the gourd-shaped.2)When it saws by strong power, the surface roughness of cutting plane increases. Moreover, when pulling a saw, big impulsive amplitude signals are detected in a sound waveform. In addition, the cycle of repetition operation becomes late as compared with a good case.3)When it saws by weak power, the surface roughness of cutting plane decreases. Moreover, the amplitude level of the sawing sound has an almost the same at "operation which pulls a saw" and "operation which returns a saw", and it is small. And it becomes sound without modulation.4)Even if a junior high school student's cutting accuracy has done fundamental items (material fixation, cutting posture, sawing angle, etc.), it is not good in many cases.5)In order to improve a cutting accuracy, It is necessary to guide fitting power and stable repetition operation. Moreover, it is thought that the method of making a junior high school student conscious of an accentuation of sawing sound and its cycle for this instruction is useful.

为了为改进初中技术教育指导方法提供基础数据，对手锯技能水平与手锯声音特征之间的关系进行了研究。结果总结如下：1）重复美丽葫芦形的波形是专家手锯声音的特征。“拉锯操作”时声音的振幅水平比“回锯操作”高。这与葫芦形相比。2）当用强功率锯时，切割面的表面粗糙度增加。而且，当拉锯时，脉冲振幅大 在声音波形中检测信号。另外，与良好的情况相比，重复操作的周期变晚。3)当用弱功率锯切时，切割面的表面粗糙度降低。另外，锯切声音的振幅水平在“拉锯操作”和“返回锯操作”中几乎相同，并且较小。而且无需调制就可以发出声音。4）即使初中生的切割精度已经做到了 5）为了提高切割精度，需要引导配合力和稳定的重复操作。此外，认为使初中生意识到锯切声音的加重及其周期的方法对于该指导是有用的。