Design And Optimization Of Cutting Device For Anti-stress Cone Of Submarine Cable

Cutting anti-stress cone is a key link in the process of making submarine cable soft joints.With the improvement of the submarine cable's withstand voltage level,the cross-sectional size increases,and the difficulty of cutting the Anti-stress cone gradually increases.At present,most researches on related cutting devices are manual assisted operations.In order to improve cutting efficiency and ensure cutting quality,a cutting device for submarine cable is designed by using SAPB systematic design method and TRIZ innovative theory in this project.and the finite element method is used to analyze the working condition and optimize the structure of the cutting device.The research contents and conclusions of this paper are as follows:(1)Analyze the process of cutting anti-stress cone and use SAPB design method to establish the overall function model of the cutting device.Through the decomposition of the overall function and the establishment of functional structure tree and functional structure model,we can gradually understand the relationship between the functional modules and functions of the cutting device.The function is solved through the morphology matrix,the 3D model of the cutting device is established by Solid Works software,the mapping from function to structure is carried out,and the conceptual design of the anti-stress cone cutting device is preliminarily completed.(2)The designed anti-stress cone cutting device is analyzed in detail,in view of the influence of cutting force on submarine cable deformation in the cutting process,and The single cutting method is improved to the multi cutting method to reduce the deformation of submarine cable by using the law of evolution to complex system in TRIZ theory.By using the method of physical conflict resolution,the supporting effect of the ejector mechanism on submarine cable is improved by adding the cone sleeve structure.In order to improve the applicability of the device,the structure of milling cutter shaft is improved by using the theory of technology conflict resolution.The cutter shaft is divided into long axis and short axis based on the principle of division,so that the cutting device can be adjusted according to different sizes of submarine cable.(3)The insulation cutting process is simulated by finite element method.The simulation calculates the torque required in the cutting process and analyzes the force of the tool through ABAQUS software.Design-expert software is adopted by establishing cutting force response surface model and analyzing the influence trend of cutting parameters on cutting force.Finally,the best cutting parameters were selected as follows: the milling cutter speed is520r/min;the feed per tooth is 0.28mm;the side tool is 2.25 mm.Under this cutting parameter,the cutting of the anti-stress cone can be effectively carried out and the cutting force is small.(4)The parts of the cutting device are analyzed and optimized by the combination of ANSYS finite element method and topology optimization method.In order to improve the cutting stability of the device,the topology optimization method is used to add the rib structure for the milling cutter support arm.After analysis and verification,the stiffness and vibration resistance of the milling cutter arm structure are improved obviously after optimization.The bearing pedestal of the cutting rotary mechanism is lightened by topology optimization method.The casting body is adjusted to the rib plate support structure,which ensures the stiffness and stress of the structure,and makes the structure lighter,and reduce the load of the worktable.(5)Build the test platform of the core cutting mechanism to cut the cable.The results show that the surface roughness of the anti-stress cone is 2.6 ? 3.5 ? m,and the error of the inclination angle of the cone is less than 1 degree.The cutting effect is better than that of manual cutting.The results show that the cutting principle and parameters of the cutting device are feasible.