先進(jìn)鑄造技術(shù).doc

先進(jìn)鑄造技術(shù)英文論文翻譯姓名：王鵬飛 學(xué)號(hào)：0905010117 指導(dǎo)教師：杜曉明 論文出處：Journal of Materials Processing Technology（材料加工技術(shù)雜志）文章題目：Development of a device for dynamical measurement of the load on casting and the contraction of the casting in a sand mold during cooling譯：鑄件負(fù)載動(dòng)態(tài)測(cè)量設(shè)備的研發(fā)以及冷卻冷卻過程間鑄件在砂型中的收縮作者及機(jī)構(gòu)：John A. ROGERS University of Illinois Urbana-CampaignTo predict and control the residual stress present in sand casting manufactured via CAE (Computer Aided Engineering), the mechanical interaction between the casting and the sand mold during cooling must be determined experimentally. A device was developed in this study to determine the load on the casting caused by the resistance of the mold and the contraction of the casting during cooling. Our device consists of two modules that work simultaneously: a module containing a load cell, for measuring the load on the casting during cooling and a module containing an LVDT (Linear Variable Differential Transformer) for measuring the contraction of the casting during cooling. In performance verification testing, the device enabled the simultaneous measurement of the load on the sand casting and the contraction of the casting. This measurement was performed dynamically during the cooling process. Additionally, for the case where the contraction of the casting was hindered by the sand mold, the permanent deformation of the casting after shake out (which leads to residual stress in the casting) was successfully measured using our device摘要通過CAE（計(jì)算機(jī)輔助工程）來預(yù)測(cè)和控制出現(xiàn)在砂型鑄造生產(chǎn)機(jī)械互動(dòng)中的殘余應(yīng)力以及冷卻過程中實(shí)驗(yàn)所決定的鑄件和砂型間的機(jī)械互動(dòng)。一件設(shè)備在一項(xiàng)研究中被開發(fā)出來，所謂這項(xiàng)研究就是在冷卻過程中確定由模具阻力和鑄件收縮引起的鑄件負(fù)載。我們的設(shè)備由同時(shí)工作的兩個(gè)模塊組成：一個(gè)模塊包含一個(gè)負(fù)載細(xì)胞，這是用來測(cè)量冷卻過程中鑄件的負(fù)載。另一個(gè)模塊包含一個(gè)LVDT（線性差動(dòng)變壓器），用來測(cè)量冷卻過程中鑄件的收縮。在性能驗(yàn)證測(cè)試中，該設(shè)備能夠同時(shí)測(cè)量鑄件負(fù)載和鑄件收縮。這項(xiàng)測(cè)試是在動(dòng)態(tài)下的冷卻過程中執(zhí)行的。此外，根據(jù)砂型阻礙鑄件收縮的情況，清理后的鑄件其永久變形（鑄造中導(dǎo)致了殘余應(yīng)力）被我們的設(shè)備成功測(cè)量出來。Keywords（關(guān)鍵詞） Sand mold; 砂型 Sand casting; 砂型鑄造 Residual stress; 殘余應(yīng)力 Distortion; 失真 CAE; 計(jì)算機(jī)輔助工程 Aluminum alloy;鋁合金1. Introduction（介紹）1) Temperature difference within a casting during cooling冷卻過程中鑄件內(nèi)的溫差 2) Sand mold restraint on the contraction of the casting during cooling冷卻過程中關(guān)于鑄件收縮的砂型限制 3) Phase transformations in the solid state during cooling冷卻過程中的固態(tài)相變 2. Experimental device（實(shí)驗(yàn)設(shè)備） 2.1. Outline of the device（設(shè)備概要）2.2. Module for measuring the load on the casting during cooling （冷卻過程中測(cè)量鑄件負(fù)載的模塊）2.3. Module for measuring the contraction of the casting during cooling （冷卻過程中測(cè)量鑄件收縮的模塊）2.4. Critical issues（關(guān)鍵問題）2.4.1. Avoiding the restraint due to the sand between the sprue and the metal molding box（避免澆口和金屬型箱體間型砂的約束）2.4.2. Avoiding a load caused by thermal expansion of the cast part after pouring（避免澆注后由于鑄件部分熱膨脹引起的負(fù)載）3. Testing the device（測(cè)試設(shè)備）4. Results and discussion（結(jié)果與討論）4.1. Results of the dynamical measurement of the load on the casting and the contraction of the casting during cooling（冷卻過程中鑄件負(fù)載和鑄件收縮的動(dòng)態(tài)測(cè)量結(jié)果）4.2. Measuring the permanent deformation of the casting after shake out （鑄件清理后后其永久變形的測(cè)量）4.2.1. Method for measuring the permanent deformation （測(cè)量永久變形的方法）4.2.2. Total contraction without permanent deformation (contraction of the flangeless casting cast in green sand mold) （沒有永久變形的總收縮濕砂型中無凸緣鑄件的收縮）4.2.3. Total contraction of the casting that had received a restraining force from the sand mold （受到砂型約束力鑄件的總收縮）5. ConclusionsIn previous studies of the restraint due to a sand mold on the contraction of a casting during cooling, only the contraction of the sand casting was examined. In particular, neither the static load on the casting just before the shake out nor the dynamical load on the casting during cooling was measured. Therefore, a device was developed in this study to determine the mechanical interaction between the casting and the sand mold during cooling. Our conclusions regarding this device are summarized as follows. 1.The developed device enables the simultaneous and dynamical measurment of the load on the casting and the contraction of the casting during cooling2. The permanent deformation of the casting after shake out was successfully measured with a precision of 93m.結(jié)論以前的約束