摘要
为了给西兰花切块机的设计提供理论依据,获得最佳切块效果,该文以收获期的西兰花作为切块对象,选择西兰花切块位置、刀具刃角、刀具结构以及入切角为影响因素,在万能材料试验机上进行了单因素与多因素的切应力试验,单因素试验结果表明:切块位置为距离花蕾顶端40 mm、光刀、入切角为60?、刀具刃角为5?~10?之间时切应力最小。多因素试验结果表明:影响切应力的因素主次次序依次是切块位置、刀具结构、刀具刃角、入切角;切块位置为距离花蕾顶端40mm、刀具结构为球形刀、刀具刃角为8?、入切角为90?时切块效果最佳。根据试验优化结果设计了西兰花切块刀具,并在自制的切块样机上进行了切块试验,切块效果良好,切块成功率达到91%,验证了刀具参数优化的合理性。研究结果可为后续西兰花切块机切块刀具的设计提供参考。
In order to explore the effect of the broccoli cutter working parameters on cutting characteristics of broccoli branch stalk as well as to optimize the working parameters of the cutting blade,the cutting tests of broccoli branch stalk were performed with electronic universal material testing machine cutting test-bed.The samples were the outer branch stalk of broccoli with same diameter.The main test equipment included the electronic universal material testing machine,blades and cutting stand,a digital camera and its image processing and analysis software ImageJ,scorpion,meter ruler,vernier caliper,protractor and marker pen.The test method and scheme were designed based on the measurement and control system of the universal material testing machine,the data measured by the pressure sensor on the universal material testing machine automatically displayed,relation curve of cutting force and time of cutting blade could be get.The maximum cutting force obtained during the cutting process was taken as the maximum cutting force FMS of broccoli branch stalk.Some researchers considered that it is more reasonable to use unit cutting force as the research target.therefore,in order to eliminate the influence of the diameter difference of broccoli branch stalk on the experimental results,the maximum cutting force per unit area was taken as the target value.The influence of the cutting blade working parameters on the maximum cutting force were studied,the cutting blade working parameters include blade structure,blade angle,cutting angle and cutting position on the branch stalk.The cutting tests were grouped into the single factor tests,multi-factor orthogonal test.The testing factors were cutting position(ranging from 30-50 mm),cutting blades(cone blade、straight blade、spherical blade),blade angle(5?-17?),cutting angle(45?-90?).Multi-factor orthogonal method was a three-factor three-level testing scheme.The multi-factor orthogonal method used to optimize the working parameters of broccoli cutter.The multi-factor test result
作者
陈建能
陈礼群
喻陈楠
蔡双雷
夏旭东
Chen Jianneng;Chen Liqun;Yu Chennan;Cai Shuanglei;Xia Xudong(Faculty of Mechanical Engineering and automation,Zhejiang Sci-Tech University,Hangzhou 310018,China;Zhejiang Key Laboratory of Planting Equipment Technology,Hangzhou 310018,China)
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2018年第23期42-48,共7页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家自然科学基金(51675486)。
关键词
刀具
应力
西兰花
切块
优化
tools
stresses
broccoli
cuts
optimization
