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The development of a woodworking knife having self-sharpening characteristics by the application of hard chrome plating only on the back.

仅在背面镀硬铬，开发出具有自锐特性的木工刀。

基本信息

批准号：
63560156
负责人：
KATO Chutaro
金额：
$ 1.41万
依托单位：
Yamagata University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1988
资助国家：
日本
起止时间：
1988 至 1989
项目状态：
已结题

项目摘要

The purpose of this study was to develop a knife having self-sharpening characteristics by applying a hard-chrome plating to only the back surface.In the first experiment, air-dried wood specimens were repeatedly cut orthogonally. The wear profile of a non-plated knife was the type in which the face surface next to cutting edge was rubbed by wood chips as well as the cutting edge tip was rounded. Also, the larger the toughness value of knife material, the smaller the radius of its tip became. The chrome knife proved, through this experiment, to have ideal self-sharpening characteristics. The chromium layer lessened the wear on the back surface and only the face surface was polished by frictional force generated when the wood chips flew on the face surface. Therefore, during almost complete life of knife, the plated knife maintained the same small cutting force and wood surface roughness as during the initial cutting period. In addition, the increase durability of the chrome-plated knife was more than five times that of the original. Aogami-1 and SKS-3 appeared to be better than SKH-51 for knife material to be chrome plated. The effective range of chromium thickness was between 0.6 to 3.1 mum. The optimum chip thickness was about 50 mum.In the next experiment, chrome-plated knives were practically tested for cutting air- dried wood specimens using a super surfacer. A chromium thickness of 2 mum and the knife material of SKS-3 were adapted on basis of the first experimental results. In the whole range of three conditions tested, namely, five woods species, various bias angles of 0 - 60ﾟ, various chip thicknesses of 40 - 160 mum, the chrome-plated knives proved to have superior self-sharpening characteristics.

本研究的目的是开发一种只在背面镀硬铬的具有自磨性的刀具。在第一个实验中，风干木材试件被重复垂直切割。非电镀刀具的磨损轮廓是刀刃附近的端面被木屑摩擦，刀尖是圆角的。刀具材料的韧性值越大，刀尖半径越小。通过这次实验证明，镀铬刀具有理想的自磨性。镀铬层减少了背面的磨损，木屑在正面飞扬时产生的摩擦力只抛光了正面。因此，在刀具的几乎整个寿命期间，镀锌刀具保持了与初始切割阶段相同的小切削力和木材表面粗糙度。此外，镀铬刀的耐用性提高了5倍以上。Aogami-1和SKS-3似乎比SKH-51更适合于刀具材料的镀铬。铬的有效厚度范围为0.6~3.1um。最佳切屑厚度约为50 mm。在接下来的实验中，使用超级表面处理机对风干木材试件进行了镀铬刀具的实际测试。在第一个实验结果的基础上，采用了2微米的铬厚度和SKS-3刀具材料。在五种木材、不同偏角0-60ﾟ、不同切屑厚度40-160um三种试验条件下，镀铬刀具均具有良好的自刃性。