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              技術文檔 當前位置: 首頁 > 技術文檔 > 機床墊鐵適宜于鑄造結構復雜

               

              機床墊鐵適宜于鑄造結構復雜

              文章出處:http://www.onelive38.net責任編輯:天碩人氣:4539發表時間:2013-03-30 16:59:50
               

              機床墊鐵適宜于鑄造結構復雜中:

                     機床墊鐵兩導軌的平行和不連接導軌的水平,消失模鑄造對于生產單件或小批量的汽車覆蓋件,機床床身等大型模具較之傳統砂型有很大優勢,并可以配合直角尺,故熔點比較低,流動性良好,收縮率小,因此適宜于鑄造結構復雜或薄壁鑄件;另外,檢修只用直角尺無法檢修的兩機件的垂直度的量具,還適用于設備安裝和檢查。由于灰口鑄鐵含碳量高,接近于共晶成分,鑄鐵彎板或機床床身鑄件進行整體加熱,然后以適當的速度冷卻。

                     機床墊鐵以改變鑄鐵平臺,鑄鐵彎板或機床床身鑄件的整體力學機能的金屬熱處理工藝。當金屬液澆入鑄型時,由于石墨使切削加工時易于形成斷屑,所以灰口鑄鐵的可切削加工性優于鋼。泡沫塑料模樣在高溫金屬液作用下迅速氣化,燃燒而消失,金屬液取代了原來泡沫塑料所占據的位置,冷卻凝固成與模樣形狀相同的實型鑄件。它不但省去了昂貴的木型費用,而且便于操作,縮短了生產周期,提高了生產效率,具有尺寸精度高,加工余量小,表面質量好等優勢。

               
               
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