Abstract
In this paper, 3D roll tensioning elastoplastic model was built by finite element method and the research object was a common circular saw blade body with hole, slot, and scraper structure. The theoretical calculation results show that there are areas dominated by tangential compressive stress near slot and scraper of roll tensioned saw blade body, which is not the expected result. It is proved that residual stress of saw blade body can be regulated by combining roll tensioning and local plastic compression process in this paper. The theoretical calculation results show that the outer edge of saw blade body near slot and scraper becomes area dominated by tangential tensile stress after the improved tensioning process. The improved tensioning process has little effect on stiffness and waist strength of circular saw blade.
Highlights
Wood cutting process and cutting tools are important research directions in the field of wood science and technology
For circular saw blade with hole, slot and scraper structure, this paper provides a new idea for the optimization and adjustment of tensioning process
A three-dimensional (3D) roll tensioning elastoplastic model was built by finite element method, which referred to the previous research results.[8,9,10]
Summary
Wood cutting process and cutting tools are important research directions in the field of wood science and technology. Dynamic characteristics and residual stress of tensioned circular saw blade was studied by some researchers. Based on the assumption that the saw blade body is an ideal disc structure, the evolution law of dynamic characteristics and residual stress in saw blade body has been studied systematically. Szymani and Mote[5,6] built a theoretical model for roll tensioning process and got the residual stress of saw blade body. In theory, when structure of saw blade body is changed, its residual stress field is bound to change, even if the roll tensioning process parameters do not change. The residual stress formation mechanism of circular saw blade with non ideal disc structure after tensioning process is a scientific and technological problem. For circular saw blade with hole, slot and scraper structure, this paper provides a new idea for the optimization and adjustment of tensioning process.
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