Robust Optimization Design For Corner Joints Of Panel Cabinet Shelves

This paper introduces the idea of robust design into the optimal design of panel furniture structure to enhance the stability of furniture structure quality and prolong the service life of furniture.The solid wood multilayer board is used as the base material,and the corner joint strength of the board T-shaped member is taken as the main research object.Through the robust design Taguchi method and the gray Taguchi method,the robust optimization design of the double round tenon connection joints of T-shaped members and the corner joint strength of eccentric parts with round tenon joint T-shaped members is carried out.Prove the feasibility of robust optimization Taguchi method and gray Taguchi method for structural optimization of panel furniture,and summarize the method and process of robust optimization of panel furniture structure based on gray Taguchi method.The main research contents and conclusions are as follows:(1) Through the Taguchi method,the robust and optimal design of the double-tenon joints of the plate T-shaped members is carried out.The diameter,length and material of the tenon are used as variables,and the ultimate bending capacity of the member is used as the evaluation index.The results show that the diameter of the tenon has the greatest influence on the flexural performance of the member,and the contribution rate to the ultimate flexural capacity of the component reaches 56.74%.With the increase of the diameter and length of the tenon,the ultimate flexural capacity of the component shows an increasing trend.For the solid wood multi-layer T-shaped member with a plate thickness of 18mm,the 50mm long and 10mm diameter of the lotus wood round tenon is the most stable design.After optimization,the ultimate flexural bearing capacity of the component is increased by 15.8 N,the signal-to-noise ratio is increased by 1.66,the optimization rates of the two are 21.07%and 4.42%,respectively.(2) Taking the corner joint strength of the eccentric part and the round tenon as the optimization object,firstly,the component deformation,the maximum equivalent stress of the connector and the round tenon are respectively used as the single target quality characteristic evaluation index of this test.After optimization by Taguchi method,it is found that the results of robust optimization are different when the tests are the same and the evaluation indicators are different.Furthermore,this paper introduces the gray relational analysis method,integrates the above three indicators,and conducts a multi-index robust optimization design for the plate T-shaped member.The results show that the three-in-one eccentric connector with a length of 40mm and a round tenon with a length of 30mm and a diameter of 8mm is the most robust result after optimization in this test.After optimization,the deformation of the component is reduced by 1.45mm,the equivalent stress of the connector is reduced by 166.03MPa.Although the equivalent stress of the round tenon has increased,the gray correlation degree has increased from 0.61 to 0.78,an increase of 27.9%.(3) Apply the optimized connectors to the cabinet,and conduct static and dynamic simulation analysis on the shelves of the cabinet.The bending static analysis results of the shelf show that the maximum deformation of the shelf is 1.247mm,which meets the requirement of no obvious deformation of the shelf in the national standard.The dynamic simulation analysis results of the shelf support show that the deformation of the shelf is 0.20mm,the equivalent stress of the round tenon connecting the shelf is 1.32MPa,and the equivalent stress of the eccentric connector is 2.58Mpa.There is no obvious deformation of the shelf as a whole,the connectors have not failed.Therefore,the connectors after the robust optimization of the gray Taguchi method are stable and reliable,and can be applied to the connection between cabinet shelves and side panels.