本文選題：機床滑塊 + 球墨鑄鐵��； 參考：《山東理工大學》2017年碩士論文

【摘要】：隨著經濟發(fā)展,我國正在由鑄造大國轉變?yōu)殍T造強國,但是由此帶來了能源消耗和環(huán)境污染等問題。隨著鑄造過程計算機數(shù)值仿真技術在實際生產中的應用,我國的鑄造生產正朝向數(shù)字化、精確化、低能耗、高效率的方向發(fā)展。圍繞這一方向,大量的科研成果正在以極高的效率投入到實際生產中,實現(xiàn)鑄件在鑄造過程的數(shù)字化、可視化,即可減少生產周期、保證鑄造質量、降低生產成本,又可減少能源消耗、保護環(huán)境,最終實現(xiàn)經濟效益與社會效益雙贏。本文結合滑塊鑄件的結構特點、使用環(huán)境及實際生產條件,設計滑塊鑄件的鑄造工藝,并采用鑄造模擬軟件Anycasting對鑄件的鑄造過程的溫度場及流場進行數(shù)值模擬,并以此為理論依據優(yōu)化鑄造工藝,消除鑄件缺陷。首先,利用三維建模軟件對鑄件進行實體建模,分析鑄件的結構特點及使用過程中受力方式,確定鑄件的材質及熔煉配料。然后,根據工藝設計原則,設計了分直澆道的階梯式澆注系統(tǒng),并在鑄件導軌處設計冷鐵,以確保此處的組織致密。最后,運用鑄造模擬軟件Anycasting對滑塊鑄件鑄造過程進行數(shù)值模擬,探究鑄件充型和凝固過程的溫度場和流場分布規(guī)律,預測了鑄造缺陷的發(fā)生位置及分布情況,并以此作為優(yōu)化鑄造工藝、消除鑄造缺陷的理論依據。此外,通過正交試驗法優(yōu)化鑄造工藝參數(shù),提升鑄件內部質量。試驗結果表明,通過優(yōu)化鑄造工藝和工藝參數(shù)后,鑄件在1320℃的澆注溫度、40mm/s的入口澆注速度下,鑄件充型過程快速、平穩(wěn)、完整,基本符合“順序充型”原則;凝固順序合理有序,基本符合球墨鑄鐵“同時凝固”原則。同時,鑄件內的縮(孔)松缺陷得到有效消除;導軌處的凝固時間合理,組織致密,滿足實際生產對鑄件質量的要求。
[Abstract]:With the development of economy, our country is changing from a big foundry country to a powerful foundry country, but it brings some problems such as energy consumption and environmental pollution. With the application of the computer numerical simulation technology in the foundry process, the foundry production in our country is developing towards the direction of digitalization, precision, low energy consumption and high efficiency. Around this direction, a large number of scientific research achievements are being put into actual production with high efficiency. To realize the digitization and visualization of castings in the casting process, the production cycle can be reduced, the casting quality can be guaranteed, and the production cost can be reduced. It can also reduce energy consumption, protect the environment, and finally realize the double-win of economic and social benefits. In this paper, the casting process of slider castings is designed according to the structural characteristics of slider castings, using environment and actual production conditions. The temperature field and flow field of casting process are numerically simulated by casting simulation software Anycasting. Based on this theory, the casting process is optimized to eliminate the casting defects. Firstly, the 3D modeling software is used to model the castings, to analyze the structural characteristics of the castings and to determine the material and melting ingredients of the castings. Then, according to the principle of process design, a step gating system is designed, and the cold iron is designed at the casting guideway to ensure the dense structure. Finally, the casting simulation software Anycasting is used to simulate the casting process of slider castings. The distribution of temperature field and flow field in the process of mold filling and solidification is studied, and the location and distribution of casting defects are predicted. It is used as the theoretical basis for optimizing casting process and eliminating casting defects. In addition, the casting process parameters were optimized by orthogonal test to improve the internal quality of casting. The results show that after optimizing the casting process and technological parameters, the casting filling process is fast, stable and complete at the inlet casting speed of 40 mm / s at 1320 鈩，

本文編號：1792233