Simulation Study Of The Beam Of Oversize Gyratory Crusher

Most casting defects such as shrinkage cavity, shrinkage porosity, cracking, anddeformation are closely related to the process. The computer numerical simulation was usedto realize the optimization of casting process. Through which we may not only reproduce thecasting production process by a visual method, but also forecast the quality of productsthrough optimal processing plan. At the same time, it will effectively reduce the productioncosts, shorten production cycle and improve the economic benefit. The ProCAST simulatingsoftware was used to simulate and improve two kinds of casting process of oversize gyratorycrusher beam. And verify casting validation and flaw detection.Shrinkage cavity defects in casting mostly occur in the beam casting wall thickness byusing circular riser design scheme. which appear at the bottom of the riser casting wallthickness flaw size is larger, and the overall distribution is symmetrical; defects in castingsare less by using the waist riser design scheme, only two defects appear in two arms ofcasting symmetrical bottom thick, and relatively concentrated distribution, which illustratesthe waist riser design scheme is superior to the circular riser design.Improve casting process design of waist riser design scheme: Which using two Heatpreserved riser for the metal liquid feeding, and increase subsidies in the riser root. At thesame time set the cold irons away from the end of the riser. According to Niyama criterion,implement casting shrinkage porosity prediction to before and after process improvement.The results show that there is area which is less than Niyama criterion for the originalcasting process away from the area of the end of the riser and chill casting, so we Predictedshrinkage porosity defects will appear in the region, and in actual production, we indeedfound detection in the region is not in conformity with the requirements; the simulationexperiment of improved process and Niyama criterion calculation show that end of thecasting to the riser is positive temperature gradient, there is no areas which is less thanNiyama criterion.The flaw detection to meet technical requirements for production of oversize gyratorycrusher beam by using the improved process.