粉体材料等静压成型超声加载系统的设计及实验  

Design and Experimental Study of Ultrasonic Vibrating System for Isostatic Pressing of Powder Materials

作　　者：杜航 傅波[1] 唐祥龙 李朝阳 DU Hang;FU Bo;TANG Xianglong;LI Chaoyang(School of Mechanical Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学机械工程学院,成都610065

出　　处：《机械工程师》2022年第2期33-35,38,共4页Mechanical Engineer

基　　金：四川省科技计划项目(2020YFG0117)。

摘　　要：为了进一步提高粉体材料等静压成型质量,在传统的等静压成型中加载超声进行辅助成型。针对超声加载的声场需求,对超声加载系统核心部件20 kHz超声振子进行了设计,对其谐振特性进行了有限元仿真分析和结构优化。搭建了超声辅助等静压成型试验装置,分别在5.0 MPa、7.5 MPa和15.0 MPa油液压力下对粉体材料试件进行10 min超声加载,结果表明:粉体材料试件的致密性和晶粒的均匀性得到了提升,同时随着油液压力的增加,试件的成型质量改善越明显。In order to further improve the quality of isostatic pressing for powder materials, ultrasonic assisted molding is carried out in traditional isostatic pressing. Aiming at the sound field requirements of ultrasonic loading, the 20 kHz ultrasonic vibrator, which is the core component of ultrasonic loading system, is designed, and its resonance characteristics are analyzed and optimized by finite element simulation. An experimental device for ultrasound-assisted isostatic pressing is established, and ultrasonic loading is carried out for 10 min on powder material specimens under oil pressure of 5.0 MPa, 7.5 MPa and 15.0 MPa, respectively. Results show that the density and grain uniformity of the powder material specimens are improved, and the molding quality of the specimen is improved more obviously with the increase of oil pressure.

关 键 词：等静压 粉体材料成型 超声振子 成型质量 

分 类 号：TH122[机械工程—机械设计及理论]