Research On NC Machining Programming And Quality Evaluation Of Tiny Integral Impeller

Tiny integral impellers are widely used in mechanical products such as micro-turbocharged engines.The part is a thin-walled part with complex profiles,which requires high processing quality and precision,so it brings lots of difficulties to the overall manufacturing process.In order to improve the processing efficiency and quality of the tiny integral impeller,Based on the different processing targets at different stages,this paper establishes a trajectory planning scheme and quality evaluation system for five-axis simultaneous milling of tiny integral impeller.By this method,the processing efficiency and processing quality of the tiny integral impeller are improved.The specific research contents are as toilows:First of all,the processing route is developed for different processing stages of the tiny integral impeller.Among them,due to the compact structure of the impeller and the large twist angle of the blade,a staged processing target is adopted,and the trajectory programming is performed by using UG12.0.The goal of roughing trajectory planning based on efficiency improvement and the finishing planning goal based on quality assurance are determined.In the roughing stage,in order to reduce the amplitude of the tool swing and improve the efficiency,the tool path planning is carried out by the method of fixed axis opening and coarsening.The finishing is based on the sub-area trajectory planning of the impeller module,and the trajectory programming of the tiny integral impeller is completed.Secondly,the tiny integral impeller performs five-axis simulation and milling force physical dynamic simulation.The VERICUT software is used to simulate the trajectory programming code,which avoids the tool collision and overcut during the actual machining process,and completes the verification of the correctness of the trajectory programming code.During the dynamic simulation of milling force,the orthogonal test scheme with trajectory parameters as the main influencing factor was developed by Deform-3D finite element simulation software.The reversed finishing trajectory function is fitted into the tool motion environment,which greatly restores the real machining and milling state,improves the effectiveness of the simulation results,and finally analyzes the orthogonal experimental data to obtain the optimal trajectory parameters of the minimum milling force.The effects of trajectory parameters on the milling force during blade finishing are further analyzed.Finally,taking the tiny integral impeller of a certain product as an example,the trajectory parameters before optimization and optimization are respectively processed by five-axis linkage.After the final scan results,the deviation values of the blade and the design model are observed,and the conclusion is drawn.The feasibility of the processing scheme is verified,and the trajectory parameter optimization scheme also has certain reference significance.And a set of quality evaluation system for the tiny integral impeller machining process is established,the evaluation index is determined for the impeller complex surface parts,the mathematical model is established by the fuzzy theory,and the corresponding comment level is given.Through the planning and verification of the tiny integral impeller rails and the optimization of the trajectory parameters,the paper finally realizes the research goal of improving the working efficiency under the premise of ensuring the processing quality of the impeller surface through the actual machining verification and quality inspection.It provides a certain reference value for the processing technology of the tiny integral impeller.