Study On Mechanical Energy Stored Type Powder High Velocity Compaction Machine

High velocity compaction (HVC) is a new powder metallurgy technology in recent years,with short process, low cost, high density advantages. With the rapid development of thedomestic manufacturing industries, especially the automotive, aerospace and other industries,market has increasing demand for powder metallurgy parts. HVC technology, with its uniqueadvantages in the preparation of high-performance powder metallurgy materials, will havebroad applications. Currently, commercial HVC equipment and its key components rely onimport, cost high and complex, maintenance and upgrade is difficult. Thus HVC and itsequipments for industrial applications is not effectively applied and popularized in domestic.A new invention of HVC machine is of great economic and realistic significant. It will helplower down the application cost of HVC, releave the reliance form importion. Also it helpsimprove the overall level of manufacturing ability of domestic material manufacturers. Forsuch purpose, the dissertation focus on the new type HVC equipment design and development,simulation and analysis method, measuring and testing techniques, the main subjects andconclusions are the following:First，With a comprehensive analysis of all kinds of high velocity compaction devicescharacteristics, the Mechanical Energy Stored Type High Velocity Compaction(MEST-HVC)method is proposed. Based on the method, the compaction energy and speed mathematicalmodels are derived. Then, the MEST-HVC equipment design method is proposed. Under theguidance of MEST-HVC equipment design method, the MEST-HVC testing machine anddevice process flow is designed, then, the dynamic characteristics of the testing machine isanalyzed.To evaluate the design proposal, an improved co-simulation analysis method has beenproposed by throughly analysis of data transmittion and interaction between mechanical,hydraulic simulation software and Virtual Instrument software. A co-simulation analysisplatform is built with ADAMS, AMESim and LabVIEW. On the platform, the simulationprocess can be manipulated and the results can be displayed in real time. Themechanical-hydraulic coupling simulation and analysis of testing machine is carried outwhich effectively verify the testing machine design.For the purpose of evaluation and validation of the test machine, two compaction speedmeasurement methods and one compaction energy test method have been researched. Thespeed measuring device and the data processing software are developed. High-speed videocamera system set up and application for velocity measurement and analysis are studied. Carry out the testing machine compaction capacity experiment using copper cylinderupsetting method, and use the copper cylinder deformation work as the basis of testingmachine compaction capacity calibration.Finally, successfully produced the test machine and conducted high velocity compactionexperiment study. Firstly, the316L stainless steel powder compaction experiment shows thatthe test machine has good forming performance. Secondly, carried out the orthogonalexperiment of the warm iron powder HVC, discuss at what extend each process parameteraffect green density, got the best process parameters under particular working condition.Result fetched by high speed camera is discuss. With those result, hammer maximumcompact force is calculated. Finally, measured the copper cylinder deformation work usingthe copper cylinder upsetting experiment under different spring elastic deformation, andcalibrated the test machine actual forming capacity.