本文通過對灰鑄鐵閥體的鑄造工藝方案的設(shè)計，包括澆注位置、分型面的選擇，砂芯和各項鑄造工藝參數(shù)的確定以及澆注系統(tǒng)、砂箱、芯盒、模板的設(shè)計。根據(jù)鑄件小的特點，分為一箱四件，并采用封閉式的澆注系統(tǒng)的方法。通過對凝固過程的溫度場和鑄造缺陷的分析，對工藝進行改進，然后繪制屏分析鑄造工藝圖與合箱圖，將數(shù)據(jù)具體化，有效地調(diào)整工藝參數(shù)，減少可能出現(xiàn)的鑄造缺降，保證工藝的可靠性。最后設(shè)汁出合理的鑄造工藝方案。關(guān)鍵詞：閥體；鑄造工藝設(shè)計；澆注系統(tǒng)；鑄造工藝圖.AbstractIn this paper, the casting process design of gray iron valve cover, including casting location, parting surface selection, sand core and casting process parameters determination and casting system, sand box, core box, template design. According to the characteristics of small castings, it is divided into four parts in one box, and the method of closed casting system is adopted. By analyzing the temperature field of solidification process and casting defects, the process was improved, and then the screen was drawn to analyze the casting process diagram and box diagram, and the data was materialized to effectively adjust the process parameters, reduce the possible casting loss and ensure the reliability of the process. Finally, a reasonable casting process plan was established.Key words: valve cover; Casting process design; Casting system; Casting process drawing. 1.1概述7 1.2鑄造行業(yè)的歷史8 1.3國內(nèi)鑄造行業(yè)的現(xiàn)狀8 1.4鑄造工藝發(fā)展展望9 1.5本課題的研究內(nèi)容10二鑄件結(jié)構(gòu)的工藝性10 2.1零件的設(shè)計 10 2.2鑄造工藝對鑄件結(jié)構(gòu)的要求12三鑄造工藝方案的設(shè)計13 3.1造型和造芯方法的選擇13 3.2澆注位置的確定14 3.3分型面的選擇15 3.4砂箱中鑄件的數(shù)量及排列方式16四鑄造工藝參數(shù)及砂芯的設(shè)計16 4.1鑄造工藝參數(shù)的確定16 4.2砂芯的設(shè)計21五澆注系統(tǒng)的設(shè)計22 5.1澆注系統(tǒng)類型的選擇22 5.2澆注系統(tǒng)尺寸的確定22 5.3直澆道的設(shè)計25 5.4橫澆道的設(shè)計25 5.5內(nèi)澆道的設(shè)計26 5.6澆口杯的設(shè)計27 5.7冒口的設(shè)計27 5.8冷鐵的設(shè)計27六鑄造工藝裝備設(shè)計27 6.1模樣的設(shè)計27 6.2模板的設(shè)計28 6.3芯盒的設(shè)計31 6.4砂箱的設(shè)計32七鑄件的落砂、清理及后處理35 7.1鑄件的冷卻35 7.2落砂35 7.3表面清理35 7.4鑄件的矯形35 7.5鑄件的缺陷修補36 7.6鑄件的內(nèi)應(yīng)力消除36結(jié)論與展望36參考文獻38重力鑄造是指金屬液在地球重力作用下注入鑄型的工藝，也稱澆鑄。廣義上的重力鑄造包括砂型澆鑄、金屬型澆鑄、熔模鑄造，泥模鑄造等；窄義的重力鑄造專指金屬型澆鑄。壓力鑄造是指金屬液在其他外力的作用下注入鑄型的工藝。廣義的壓力鑄造包括壓鑄機的壓力鑄造和真空鑄造、低壓鑄造、離心鑄造等；窄義的壓力鑄造專指

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