發(fā)布時(shí)間：2018-04-23 13:51

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

【摘要】：隨著經(jīng)濟(jì)發(fā)展,我國正在由鑄造大國轉(zhuǎn)變?yōu)殍T造強(qiáng)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(jì)算機(jī)數(shù)值仿真技術(shù)在實(shí)際生產(chǎn)中的應(yīng)用,我國的鑄造生產(chǎn)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(shí)際生產(chǎn)中,實(shí)現(xiàn)鑄件在鑄造過程的數(shù)字化、可視化,即可減少生產(chǎn)周期、保證鑄造質(zhì)量、降低生產(chǎn)成本,又可減少能源消耗、保護(hù)環(huán)境,最終實(shí)現(xiàn)經(jīng)濟(jì)效益與社會(huì)效益雙贏。本文結(jié)合滑塊鑄件的結(jié)構(gòu)特點(diǎn)、使用環(huán)境及實(shí)際生產(chǎn)條件,設(shè)計(jì)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(jìn)行數(shù)值模擬,并以此為理論依據(jù)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(jìn)行實(shí)體建模,分析鑄件的結(jié)構(gòu)特點(diǎn)及使用過程中受力方式,確定鑄件的材質(zhì)及熔煉配料。然后,根據(jù)工藝設(shè)計(jì)原則,設(shè)計(jì)了分直澆道的階梯式澆注系統(tǒng),并在鑄件導(dǎo)軌處設(shè)計(jì)冷鐵,以確保此處的組織致密。最后,運(yùn)用鑄造模擬軟件Anycasting對滑塊鑄件鑄造過程進(jìn)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(yù)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(jù)。此外,通過正交試驗(yàn)法優(yōu)化鑄造工藝參數(shù),提升鑄件內(nèi)部質(zhì)量。試驗(yàn)結(jié)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(shí)凝固”原則。同時(shí),鑄件內(nèi)的縮(孔)松缺陷得到有效消除;導(dǎo)軌處的凝固時(shí)間合理,組織致密,滿足實(shí)際生產(chǎn)對鑄件質(zhì)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(hào)：1792233