(1. 燕山大學(xué) 先進(jìn)鍛壓成形技術(shù)與科學(xué)教育部重點(diǎn)實(shí)驗(yàn)室，秦皇島 066004；
2. 北京動(dòng)力機(jī)械研究所，北京 100074；
3. 燕山大學(xué) 車(chē)輛與能源學(xué)院，秦皇島 066004)
摘 要: 針對(duì)某航空發(fā)動(dòng)機(jī)高溫合金GH3044薄壁管凸環(huán)零件的成形難題，采用固體顆粒介質(zhì)成形(SGMF)工藝，基于管材成形過(guò)程的塑性力學(xué)分析和有限元數(shù)值仿真，優(yōu)化工藝方案，設(shè)計(jì)并制造模具，試制合格零件。采用有限元軟件ABABQUS平臺(tái)下的Drucker-Prager模型描述固體顆粒介質(zhì)所特有的離散性摩擦材料特征，建立成形工藝有限元數(shù)值仿真模型、優(yōu)化管端軸向進(jìn)給力和介質(zhì)成形力的匹配關(guān)系，得到軸向進(jìn)給力對(duì)零件減薄率、壁厚差以及型面輪廓的影響規(guī)律。采用水平分模和彈性進(jìn)給式模具結(jié)構(gòu)，在單動(dòng)壓力機(jī)上實(shí)現(xiàn)了合模、軸向進(jìn)給及介質(zhì)加載等多動(dòng)作壓制功能。
關(guān)鍵字: 高溫合金；固體顆粒介質(zhì)；管材成形；管端進(jìn)給力；數(shù)值模擬
（1. Key Laboratory of Advanced Forging & Stamping Technology and Science,
Ministry of Education of China, Yanshan University, Qinhuangdao 066004, China;
2. Beijing Power Machineries Institute, Beijing 100074, China;
3. College of Vehicles and Energy, Yanshan University, Qinhuangdao 066004, China）
Abstract:To meet the challenge of forming high temperature alloy (GH3044) parts, solid granules medium forming (SGMF) process was adopted for forming a convex ring shaped tube that was used in the aircraft engine. Based on the plastic mechanical analysis and finite element numerical simulation of the forming process, the technology process was optimized and the moulds was manufactured and designed, with which the qualified parts were produced. Drucker-Prager model in the finite element software ABABQUS was adopted to describe frictional material characteristics peculiar to solid granules medium. Based on it, the finite element numerical simulation model of the SGMF process was established. Through the analysis, the best matching of the axial force and the medium loading force was optimized, and the influence law of axial force on reduction ratio, thickness difference and surface contour of the tube is found. With the mold structure of horizontal parting and flexibility feeding, the mould can do multiple actions, such as mold closing, axial feeding and medium loading with single press.
Key words: high temperature alloy; solid granular medium; tube forming; tube axial force; numerical simulation
