直刃剪 的英文怎麼說
中文拼音 [zhírènjiǎn]
直刃剪
英文
normal straight blades snips-
2 % 22 % and 29 % respectively less than using other three knives at cutting speed of 500mm / min when the moisture contents of rootstalks was 48. 2 %. the cutting forces were tested at four different parts of rootstalk that were the middle part along a radius, the tip part along a radius, the middle part along axis and the stalk part along a radius, and the force at the middle along a radius is the largest and increase 32 % 45 % 111 %, respectively more than at the other three parts. the force increase 37 % to cut the rootstalks from the areas one crop a year more than that from two crops a year
試驗結果表明,根茬含水率愈高,剪切力愈小,根茬含水率與剪切力近似為二次曲線關系;刀片剪切速度愈快,剪切力愈小;凸曲線、斜線、凹曲線和直線四種不同的刀刃曲線對整株根茬剪切力依此由小到大,凸曲線和斜線剪切時有一定程度的滑切作用,所以剪切力相比較小,當根茬含水率為48 . 2 ,剪切速度500mm min時,與其他三種曲線相比凸曲線型刀刃的剪切力依次分別減少了7 . 2 、 22和29 ;對根茬中部、梢部和根部的剪切力,在相同試驗條件下,徑向中部最大,比梢部,軸向根部和根部莖稈所需剪切力分別增加32 、 45和111 ;當含水率為48 . 2 ,刀片的剪切速度為500mm min時,一年一熟玉米根茬比一年兩熟的玉米根茬剪切力增大37 。
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