The FEM analysis of stress and deformation of steel base of the special diamond saw blades are carried out.The small carbide round segments are welded on the side of blades in order to increase the side wear re sistan...The FEM analysis of stress and deformation of steel base of the special diamond saw blades are carried out.The small carbide round segments are welded on the side of blades in order to increase the side wear re sistance of blade.Comparing with conventional saw blade,the maximum stress val ues of reasonable special saw blade are reduced respectively about 17%20% 33%,and the maximum deformation values are reduced respectively about 26%22 %44.7%in thetangential(X),radial(Y)and axial(Z)direction.The stress conce ntration zone is decreased for the special structure diamond saw blade.The stru ctures of diamond saw blade with different number of hard material pellet are an alyzed and optimized.展开更多
The problems of severe sawtooth wear,harsh sawing noise,and low surface quality during the processing of circular saw blades need to be solved.To improve the cutting performance of TiC-based cermet saw blades,microtex...The problems of severe sawtooth wear,harsh sawing noise,and low surface quality during the processing of circular saw blades need to be solved.To improve the cutting performance of TiC-based cermet saw blades,microtextures parallel to the cutting edge were fabricated on rough and fine sawteeth by laser machining.The cutting tests were performed on a sawing platform under lubricated conditions.Models of the sawing arc length and working sawtooth cutting force variations were developed for sawing steel pipes,and the accuracy of the sawing force model was verified experimentally.The results indicate that the variations in the sawing force are proportional to the sawing arc length.The circular saw blades with microtextures that did not penetrate the sawtooth rake face exhibited the lowest cutting force,sawing noise,and highest machined surface quality.Furthermore,the worn-out distance of the rougher and finisher sawteeth was reduced by approximately 7.4%and 44.1%,respectively,compared with conventional circular saw blades.The main failure modes of sawteeth were tip wear,rake face adhesion,and oxidative wear.In addition,the mechanism by which the textures improve the cutting and wear properties of TiC-based circular saw blades was discussed.This study provided a significant concept for enhancing the cutting performance of circular saw blades and improving the machined surface quality.展开更多
The serrated incisors of grasshopper [Chondracris rosea rosea （De Geer）] possess an advantageous capacity for cutting plant fiber. Inspired by this special geometrical structure of incisors, bionic saw blade was des...The serrated incisors of grasshopper [Chondracris rosea rosea （De Geer）] possess an advantageous capacity for cutting plant fiber. Inspired by this special geometrical structure of incisors, bionic saw blade was designed and manufactured. MATLAB software digital image processing technology was used to obtain outer margin profile from stereomicroscope pho- tograph of the serrated incisors. The outer margin profile of incisors was fitted and expressed by six-order polynomial function. To compare the cutting capacity of bionic and traditional saw blades, the internodes of dry corn stalks were cut perpendicularly. Cutting force-deformation characteristics were obtained by universal testing machine. The results of cutting experiments show that the maximum cutting force of bionic saw blade was 128.26 N, which is 15.87% lower than 152.45 N of traditional saw blade; the average cutting force of bionic saw blade was 51.56 N, which is 28.17% less than 71.78 N of traditional saw blade. Meanwhile, the cutting energy consumption of bionic saw blade was 8.95 J, which is 12.85% less than 10.27 J of traditional saw blade. Overall, the bionic saw blade can lead to noticeable reduction of the cutting force and energy. These results will be helpful for designing cutting elements of corn stalk harvesting, biomass size reduction and other processing machinery.展开更多
The article investigates the problem of lightening the construction of the saw cylinder of the gin by drilling a central longitudinal through hole on the shaft and cutting circular holes on the saw blades. This is acc...The article investigates the problem of lightening the construction of the saw cylinder of the gin by drilling a central longitudinal through hole on the shaft and cutting circular holes on the saw blades. This is accompanied by a relatively large decrease in the mass of the saw cylinder and a relatively smaller decrease in the axial moment of inertia of the cross-sectional area of the shaft, which provides the maximum deflection of the saw cylinder under the action of its own gravity in the middle of the span is from 0.450 mm to 0.406 mm.展开更多
本文分析了圆锯片设计及制造优化中减振降噪水平与动态稳定性的研究热点与前沿理论的演进路径,基于可视化分析软件CiteSpace,以2002—2022年中国知网和Web of Science核心合集数据库为数据来源,分别从年发文量、关键词、发文作者及发文...本文分析了圆锯片设计及制造优化中减振降噪水平与动态稳定性的研究热点与前沿理论的演进路径,基于可视化分析软件CiteSpace,以2002—2022年中国知网和Web of Science核心合集数据库为数据来源,分别从年发文量、关键词、发文作者及发文机构,对圆锯片结构设计及生产工艺的一般方法及特点进行初步探讨,根据关键词时间线及突显词对未来发展趋势进行展望。研究结果表明,2002—2022年圆锯片相关研究领域的中英文文献发文量平稳,研究机构间的合作相对分散,研究热点主要集中在圆锯片结构设计优化和生产工艺优化方面。结合关键词演变知识图谱,总结了提升圆锯片减振降噪水平及动态稳定性的方法,指明了该领域未来的研究重点和发展方向。展开更多
文摘The FEM analysis of stress and deformation of steel base of the special diamond saw blades are carried out.The small carbide round segments are welded on the side of blades in order to increase the side wear re sistance of blade.Comparing with conventional saw blade,the maximum stress val ues of reasonable special saw blade are reduced respectively about 17%20% 33%,and the maximum deformation values are reduced respectively about 26%22 %44.7%in thetangential(X),radial(Y)and axial(Z)direction.The stress conce ntration zone is decreased for the special structure diamond saw blade.The stru ctures of diamond saw blade with different number of hard material pellet are an alyzed and optimized.
基金supported by the National Natural Science Foundation of China(Grant No.52275443)the Key Research and Development Projects of Shandong Province(Grant No.2020CXGC011003).
文摘The problems of severe sawtooth wear,harsh sawing noise,and low surface quality during the processing of circular saw blades need to be solved.To improve the cutting performance of TiC-based cermet saw blades,microtextures parallel to the cutting edge were fabricated on rough and fine sawteeth by laser machining.The cutting tests were performed on a sawing platform under lubricated conditions.Models of the sawing arc length and working sawtooth cutting force variations were developed for sawing steel pipes,and the accuracy of the sawing force model was verified experimentally.The results indicate that the variations in the sawing force are proportional to the sawing arc length.The circular saw blades with microtextures that did not penetrate the sawtooth rake face exhibited the lowest cutting force,sawing noise,and highest machined surface quality.Furthermore,the worn-out distance of the rougher and finisher sawteeth was reduced by approximately 7.4%and 44.1%,respectively,compared with conventional circular saw blades.The main failure modes of sawteeth were tip wear,rake face adhesion,and oxidative wear.In addition,the mechanism by which the textures improve the cutting and wear properties of TiC-based circular saw blades was discussed.This study provided a significant concept for enhancing the cutting performance of circular saw blades and improving the machined surface quality.
文摘The serrated incisors of grasshopper [Chondracris rosea rosea （De Geer）] possess an advantageous capacity for cutting plant fiber. Inspired by this special geometrical structure of incisors, bionic saw blade was designed and manufactured. MATLAB software digital image processing technology was used to obtain outer margin profile from stereomicroscope pho- tograph of the serrated incisors. The outer margin profile of incisors was fitted and expressed by six-order polynomial function. To compare the cutting capacity of bionic and traditional saw blades, the internodes of dry corn stalks were cut perpendicularly. Cutting force-deformation characteristics were obtained by universal testing machine. The results of cutting experiments show that the maximum cutting force of bionic saw blade was 128.26 N, which is 15.87% lower than 152.45 N of traditional saw blade; the average cutting force of bionic saw blade was 51.56 N, which is 28.17% less than 71.78 N of traditional saw blade. Meanwhile, the cutting energy consumption of bionic saw blade was 8.95 J, which is 12.85% less than 10.27 J of traditional saw blade. Overall, the bionic saw blade can lead to noticeable reduction of the cutting force and energy. These results will be helpful for designing cutting elements of corn stalk harvesting, biomass size reduction and other processing machinery.
文摘The article investigates the problem of lightening the construction of the saw cylinder of the gin by drilling a central longitudinal through hole on the shaft and cutting circular holes on the saw blades. This is accompanied by a relatively large decrease in the mass of the saw cylinder and a relatively smaller decrease in the axial moment of inertia of the cross-sectional area of the shaft, which provides the maximum deflection of the saw cylinder under the action of its own gravity in the middle of the span is from 0.450 mm to 0.406 mm.
文摘本文分析了圆锯片设计及制造优化中减振降噪水平与动态稳定性的研究热点与前沿理论的演进路径,基于可视化分析软件CiteSpace,以2002—2022年中国知网和Web of Science核心合集数据库为数据来源,分别从年发文量、关键词、发文作者及发文机构,对圆锯片结构设计及生产工艺的一般方法及特点进行初步探讨,根据关键词时间线及突显词对未来发展趋势进行展望。研究结果表明,2002—2022年圆锯片相关研究领域的中英文文献发文量平稳,研究机构间的合作相对分散,研究热点主要集中在圆锯片结构设计优化和生产工艺优化方面。结合关键词演变知识图谱,总结了提升圆锯片减振降噪水平及动态稳定性的方法,指明了该领域未来的研究重点和发展方向。
