Research On Temperature Influence And Control Of Coating Luxurious Car Interior Parts

As people use more cars and demand more and more quality,the interior of the car has gradually become an important part of the design of the car,the instrument panel as the most contact with the car occupants of the interior parts,its softness,comfort and aesthetics increasingly become the focus of people’s consideration when buying cars.Some high-end luxury car brands,taking into account the brand effect,will use materials with dark patterns or brand logos in the skin part of the instrument panel composite blanks.Due to the complex skeleton structure of the parts,including planes,curved surfaces,elevations,sharp corners,etc.,the composite blanks are prone to stress concentration and uneven strain distribution under the dual action of temperature and pressure,causing distortion of the epidermal skin pattern and uneven lamination,come unglued and other phenomena.This is due to the fact that the distribution of the temperature field in the manufacturing process affects the distribution of the stress field,which in turn affects the strain field of the part,leading to uneven skin fit and deformation.Therefore,this paper uses CATIA software to model the instrument panel,and then selects the local feature area of the instrument panel,and uses ABAQUS simulation software to simulate the temperature field of the car instrument panel luxury interior coating.The paper investigates the effect of temperature on the distribution of stress and strain fields and the deformation of the part.Due to the different thermal expansion coefficients of the cladding layers,different degrees of thermal stress and strain are generated in each layer of the coating material under the action of thermal stress during the coating process,which in turn affects the deformation of the cladding formed part.The simulation results show that a small temperature reduction can reduce the stress concentration and strain in the part.Therefore,in this paper,by comparing the stresses,strains and deformations of the parts under different temperature conditions through orthogonal experiments,the optimal temperature control parameters are derived.In addition,in order to get close to the actual working conditions,the pressure field analysis is added to the parts,and the influence of the external force field on the instrument panel parts during the coating hot pressing process is analyzed in all aspects.By comparing the stress and strain field distribution and deformation of the fabricated parts before and after the temperature regulation,the effectiveness of the optimized parameters of temperature regulation under the combined effect of temperature and pressure is verified.The results show that the optimization of temperature regulation is effective in relieving the stress and strain concentration of the part and reducing the deformation of the part,whether the temperature field acts alone or under the dual action of temperature-pressure field.For the whole coating process,the stress value in the stress concentration area was reduced from 18.29 Mpa to 11.17 Mpa after temperature control,which was reduced by 38.92%,and the middle part with the largest deformation was reduced from 0.6541 mm to 0.5185 mm,which was reduced by20.73%.Finally,the optimized temperature parameters were verified experimentally by selecting the deformation of different areas of the test points of the fabricated parts and comparing the experimental deformation values with the simulated deformation values,and it was found that the error between the simulated and experimental results of deformation was within ±10%,which verified the accuracy and effectiveness of the optimization results of the simulation study of temperature regulation.