| In our country,the circular saw blade is widely used in all kinds of industries.Led by the disc cut circular saw blade,through relevant simulation software to study its vibration problem,find the shortcomings of the disc circular saw blade,and solve the serious deformation problem in the axial and radial direction in the process of the circular saw blade work.To ensure not only the service life of circular saw blade,but also the rigidity of circular saw blade is a big problem in the field of saw blade at present.Therefore,a more practical and effective design scheme of bowl circular saw blade was explored.(1)Combined with literature review and market research,17 kinds of bowl-shaped circular saw blade design schemes were studied and proposed.Taking the first 100 order natural frequencies of the bowl-shaped circular saw blade as the research object,based on the ANSYS finite element analysis platform,the relevant parameters of the bowlshaped circular saw blade,such as "bowl height",radial groove,sandwich material and sandwich thickness,were systematically studied.Based on the theory of traveling wave vibration,the typical modes of various circular saw blades were compared in multiple ways.Finally,SPSS orthogonal analysis software was used to analyze the three main parameters of bowl circular saw blades: "bowl height",sandwich material and sandwich thickness.Finally,combining the orthogonal test table,inter-subject effect test factor,multiple comparisons between the same factors,and comprehensive consideration of the axial stiffness and vibration reduction of the bowl circular saw blade,scheme 16(h=2mm;The design of damping sandwich =0.4mm,h =2mm)is the object of subsequent research in this thesis.(2)This part is designed on the basis of Scheme 12 bowl-shaped circular saw blades.In order to pursue better simulation effect,36 artificial diamond cutting heads are added to the matrix of this kind of circular saw blades,which is defined as Scheme18.Scheme 16(sandwich bowl circular saw blade)was added as the control group,which was defined as Scheme 19 after diamond cutting head was added.The vibration stability analysis and sawing force solution of scheme 18 and Scheme 19 were carried out successively,which fully confirmed the rationality of the design of scheme 19.(3)Based on the design of Scheme 18 bowl-shaped circular saw blade,the related fatigue life of the sawtooth and other important parts of the bowl-shaped circular saw blade was solved under the action of cutting force cycle.(4)The beech model was introduced,the material properties with higher hardness were attached,the failure mode was set,the solution parameters were set in detail,and the display dynamics of the bowl circular saw blade was analyzed.The stress variation of the saw blade when cutting beech material is simulated.The simulation of cutting beech material with a bowl-shaped circular saw blade was carried out,which proved the feasibility of the design of the bowl-shaped circular saw blade.By comparing the effects of the two feeding modes on the selected beech material,it is concluded that the equivalent stress on the first contact cutting head of the circular saw blade at the same speed and feed speed is greater than that on the side cutting.At the same time,it is concluded that the maximum equivalent stress is always generated at the tip of the first serrated blade in contact with the beech material when the bowl circular saw blade is cutting. |
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