低电阻电磁调速电机在低速运转时考虑电机的散热效果,电枢是由铝和钢圈复合而成,外圆要求铸出深20mn,宽5mm的散热片,如图所示.这种铸件属深槽型铸件,按一般铝合金熔模铸件深度H和间距d的关系是:d≥1.5mm,H≤2d,电枢铝铸件H=20mm,d=5mm,H是d的5倍.这样一般用手工操作制壳方法由于壁与壁之间底部涂复模壳层太薄,承受不了浇注时金属液的静态压力,浇注后铸件深槽底部不平,钢水渗漏成图 Low-resistance electromagnetic speed control motor consider the cooling effect of the motor at low speed, the armature is made of aluminum and steel composite, the outer circle requires the casting of deep 20mn, width 5mm heat sink, as shown. The deep groove castings, according to the general aluminum alloy castings depth H and spacing d relationship is: d ≥ 1.5mm, H ≤ 2d, armature aluminum castings H = 20mm, d = 5mm, H is 5 times d. This is generally used by the manual shell system as the wall between the bottom wall coated with the mold shell is too thin, can not withstand the static pressure liquid metal casting, casting castings deep groove bottom uneven, molten steel leak into the map