





摘" 要:該文采用有限元法對電機鐵芯加工中典型的疊鉚工藝進行仿真分析,分別計算量中過盈量狀態下的疊鉚強度,隨著過盈量的增加,沖片之間的疊鉚強度越高。采用高頻加熱護套后當過盈量為0.03 mm時,護套上的應力約為75 MPa;當過盈量為0.04 mm時,護套內的應力大于300 MPa達到了330 MPa。為避免護套在裝配和翻遍過程中破損,應選擇轉子護套的過盈量為0.03 mm。
關鍵詞:有限元;鐵芯;高頻加熱;跌落;強度;過盈量
中圖分類號:TG385" " " 文獻標志碼:A" " " " " 文章編號:2095-2945(2024)25-0001-04
Abstract: This paperuses the finite element method to simulate and analyze the typical lamination riveting process in the machining of motor core. The lamination riveting strength under the interference state of quantity 4 is calculated separately. As the interference amount increases, the lamination riveting strength between the punched pieces becomes higher. When using a high-frequency heating sheath, the stress on the sheath is about 75 MPa when the interference is 0.03 mm, as shown in the following figure. When the interference is 0.04 mm, the stress inside the sheath is greater than 300 MPa and reaches 330 MPa. In order to avoid damage to the sheath during assembly and flipping, the interference fit of the rotor sheath should be selected as 0.03 mm.
Keywords: finite element; motor core; high-frequency heating; riveting process; strength; interference
典型的硅鋼片材料鐵芯疊裝有3種加工工藝方法:一是預先在每片硅鋼片表面噴涂黏接膠液,而后把每片硅鋼片疊成一摞,在高頻加熱高溫高壓下進行固化,最終把相鄰的硅鋼片黏接為一體,形成一個完整的鐵芯,這種方法加工的鐵芯前期需要大量的時間對膠液進行噴涂,后期需要花大量的時間對硅鋼片在高溫高壓下溢出的多余膠液進行清理。二是預先把每一片硅鋼片疊成一摞,然后在兩端施加壓力,使用高能激光焊機設備在硅鋼片表面沿著疊裝的軸向焊接,通過融化硅鋼片材料把沒有連接關系、松散的硅鋼片焊接成一個完整的鐵芯,這種方法在加工的過程中會有高能激光輻射,加工完成后焊接的兩端由于金屬融化后的流動有方向,會在兩端產生焊接高點,需要打磨。同時,針對外尺寸較大,內尺寸較小的鐵芯沖片,在焊接時由于焊接工具的限制,僅能焊接外圓尺寸,導致焊接完成后外圓貼合緊密,內圓則較為松散,其在進行端面打磨時需要打磨更多的余量。……