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        萬能材料試驗機的特點分析

        更新時間:2017-10-18 來源:拉力試驗機關閉

          萬能材料試驗機的特點分析
          萬能試驗機進入我國市場比較晚,伴隨著社會的進步,國力的增強,各類新材料層出不窮,原有材料的性能也有了進一步的提高,使用面也在不斷的擴大,因而對材料的檢驗也提出了更高的要求。在上世紀80年代之前,材料試驗機的使用僅局限于金屬等少數領域,而如今,材料試驗機的使用范圍已不再只限于金屬等領域了,它已經擴展到了所有的行業。材料試驗機是過去的手動液壓試驗機的領域,發展到今天,多種控制模式并存,性能特點各異,功能強大,在這琳瑯滿目的試驗機中,如何選擇一款適合自己特點的試驗機是大多數用戶所關心的事。
          由于目前絕大多數的材料試驗都是靜力學性能試驗,為此,下面就針對目前市場上的常見萬能試驗機的性能特點做一個簡單的對比分析,提出一個選型原則,供大家參考。
          一、萬能材料試驗機普遍分類 目前市場上常見的萬能材料試驗機主要有兩大系列,
          1、電子萬能: 常規電子萬能材料試驗機 高性能電子萬能材料試驗機
          2、 液壓機: 數顯液壓萬能材料試驗機 微機控制液壓萬能材料試驗機,電液伺服液壓萬能材料試驗機
          二、性能特點
          1、液壓系列
          1)電液伺服類萬能材料試驗機 它主要采用了精密高壓油源作為動力源,使用伺服閥或比例閥作為控制元件進行閉環自動控制,因而控制性能較高,一般可實現載荷、應變、位移三種控制模式。同手動液壓萬能材料試驗機一樣,受油源流量的限制,他的試驗速度較低。由于采用閉環自動控制,系統剛度成了整個系統正常工作的關鍵。眾所周知,液體的剛度是比較低的,為了盡可能的減少液體對整機剛度的影響,一般電液伺服試驗機的行程都不大,同樣受整機剛度的影響,電液伺服類試驗機的噸位都不可能做的很小,基本上都在一噸以上。但由于它有多種控制模式,因而具有使用靈活,性能較高的特點。
          2)手動液壓萬能材料試驗機 手動液壓萬能材料試驗機主要采用簡易高壓油源作為動力源,手動調整閥作為控制元件,并進行人工手動實現加載,因而,它屬于開環控制系統。由于受油源流量及主機結構的限制,它的油缸活塞行程較小,常見的一般在300mm左右,它的試驗速度一般也較小。受價格因素的影響,測力傳感器一般采用壓力傳感器(大噸位基本采用壓力傳感器)。因而,精度較低,量程較小,一般精度為1級或2級,量程一般為4%-100%F.S。受油缸摩擦力的影響,噸位一般很難做到很小,國內最小為5T。但由于它所特有的低價及大噸位的特點,目前,在成品檢驗、單一材料指標的測試中還在大量使用。
          2、 電子萬能系列
          1)高性能電子萬能類試驗機采用伺服電機作為動力源,絲杠、絲母作為執行部件,它與常規電子萬能試驗機所不同的是它的控制方式可為載荷控制,也可為應變控制或位移控制。除了具有常規電子萬能的速度寬,行程大的特點外,還具有電液伺服類試驗機的全部優點,因而它是目前性能最好的萬能材料試驗機。
          2)常規電子萬能也采用伺服電機作為動力源,絲杠、絲母作為執行部件,實現試驗機移動橫梁的速度控制,它的試驗速度范圍可進行調整,以RGM-200為例,它的試驗速度可達0.001mm/min-1000mm/min,速比可達100萬倍之多,試驗行程可按需要而定,最大可達幾米。這是液壓類試驗機無論如何也實現不了的。隨著電子技術的發展及伺服電機性能的提高,電子萬能所采用的電機從早期的直流伺服電機到現在的更多的采用交流伺服電機,從早期的功率元件選用可控硅進行移相觸發控制到今天的采用多種功率模塊實現脈寬調制控制,電子萬能的性能有了質的飛躍,由于常規電子萬能采用速度控制,因而對系統剛度的要求不高,這樣就為小噸位試驗機的實現創造了有利的條件。從目前國際、國內的情況看,一噸以下試驗機基本上都為常規的電子萬能類試驗機。它的用途最廣,性價比最高。
          濟南美特斯測試技術有限公司主要生產經營液壓萬能試驗機、電子萬能試驗機、壓力試驗機、拉力試驗機、沖擊試驗機、硬度計、彈簧試驗機、相檢測設備、鑄造試驗儀器、電線電纜檢測儀器、光學儀器、無損檢測儀器、橡膠塑料檢測儀器、環境試驗箱、建筑交通檢測儀器、標準測力儀、紡織檢測儀器及石油產品檢測儀器等。可為機械制造、冶金礦山、汽車船舶、石油化工、科研及大專院校、能源、交通、航空航天等行業提供各類試驗儀器及技術服務。另外,我公司還承接各類非標試驗機項目和試驗機的技術升級改造項目
          我公司經多年努力,已具有*大的影響力,在用戶中建立了良好的信譽,在市場中樹立了自己的優秀品牌。我們決心更加努力,把我們的各項工作做的更好。始終保持技術領先地位,竭誠為廣大用戶提 供更優質、更完善的服務。并熱忱歡迎廣大用戶朋友來電來函咨詢洽談,攜手并進、共同發展,共創美好明天。


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