| In order to stand out from the increasingly fierce competition in the automobile market,the production mode of automobile manufacturers has been put forward higher requirements.Pre-batch molds are widely used in trial production of new materials,new processes and new products because of their low cost and short cycle times.At present,there are still few researches on the computer-aided intelligent design system for pre-batch drawing dies.Therefore,it is necessary to study the difficulties and pain points in the actual design of pre-batch drawing dies,realize its intelligent design,and improve its design efficiency and design quality.In this paper,the problems and related technologies in the design of pre-batch drawing dies for body panels are deeply studied,and the development of an intelligent aided design system for pre-batch drawing dies for body panels is carried out.The research contents are mainly reflected in:(1)In this paper,the different characteristics and application scenarios of prebatch drawing dies and mass production dies are studied,and the design process of prebatch drawing dies and their parting lines is studied.Finally,the research on parameterization,feature modeling technology and NX secondary development technology is also emphasized.These theoretical methods can become important references for the intelligent design of pre-batch drawing dies in the future.(2)In order to complete the automatic design of the die structure of the pre-batch drawing die with high efficiency and high quality,an abstract attribute association modeling method is proposed in this paper.Then,the key technology and concrete realization of abstract attribute association modeling are studied through the design example of pre-batch drawing die related parts,it is found that it can not only eliminate more than 70% of design errors and design defects,but also shorten the mold development cycle by 80%.(3)Aiming at the defects of the original parting line of the pre-batch drawing die,a parting line processing method is proposed.The proposed curve bias algorithm based on feature points has been verified by an example,and the curve bias algorithm can ensure both the bias accuracy and the smoothness continuity.Then,through the comparison experiment with the traditional parting line processing method,it can be seen that the parting line processing method of this system can shorten the design cycle of the parting line processing link by about 84% under the condition of meeting the overall requirements.(4)Aiming at the problems existing in the weight reduction of pre-batch drawing dies,a standardized solution for quality adjustment and inspection of pre-batch drawing dies is proposed.First,common lightening holes are classified,and then each type of lightening holes is associated with modeling design.Finally,with the aid of the mass ratio algorithm and quality comparison information,the rapid realization of mold quality inspection and adjustment is realized.The example verification shows that this method can improve the work efficiency of the weight loss link by 75%.(5)It focuses on the design and realization of the secondary development programming of the system and the design and implementation of the interactive interface.And based on the above theories and methods,the development of the intelligent aided design system for pre-batch drawing dies is completed,taking the body design of the front panel as an example.Through the experimental comparison with the traditional design method,it can be seen that the use of this system can not only improve the work efficiency by about 84%,but also reduce design errors and defects by more than 70%. |
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