The Structure Improvement Design Of Main Parts Of 1000 Tons Floating Shaft Shearing Machine

Shearing machine is indispensable equipment in steel production as well rolling process.In the shearing process,exposed under high temperature and dusty condition and influenced by its own vibration,fatigue and heat,the production capacity,reliability,and security of shearing machine will be greatly reduced.This thesis,based on the analysis of the 1000 tons floating shaft shearing machine through the finite element method,proposes structure optimization of its main components according to the manufacturer's requirements,which meets the needs of reliable structure,strength,rigidity and non-deformation,thus to guarantee the normal work station of shearing machine.The maximum shear stress of existing 1000 tons floating shaft shearing machine is 1000 tons,with the maximum shearing section size 400 by 400.According to the manufacturer,the maximum shearing section size should be 480 by 480.Based on this,firstly the thesis the establishes the 3d modeling for main component eccentric shaft,eccentric rod and rack using SolidWorks software and analyzes the rigidity and strength using ANSYS analyzing method.The results show that it can meet the requirements of the existing shear section of 400 by 400.But as to 480 by 480 shear section,the shear stress,opening degree and maximum stroke cannot be met.Thus,optimization of main components is needed.Secondly,the thesis puts forward the improved scheme of the major components structure.And based on this,it carries on the finite element analysis for the improved eccentric shaft and pull rod,and proved that it can meet the needs of strength and rigidity.Thirdly the thesis carries on the modal analysis of the improved eccentric shaft and eccentric lever,to get the dynamic characteristics and vibration intensity,and made detailed analysis on its dynamic characteristics to verify its stability.Finally the thesis carries on the fatigue analysis for the improved eccentric rod,and it proves that the number of the fatigue cycle is larger than it is designed,and it can meet the requirements of eccentric rod fatigue life.The research and conclusion of the thesis can not only give significant guidance to the practical production of 1000 tons floating shaft shearing machine,but also improved the shear machine to meet the production requirement,thus it has an important reference value.