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大家知道铝合金压铸浇注形式都有哪些吗?

来源:http://www.jnhjgs.cn     发布时间:2020-01-06 13:17:14    点击:

整个浇注系统采用变截面形式,即浇注系统由直流道逐渐收缩为内流道,以保证锌合金液连续不断地充满浇注系统,使涡流夹带更小化。
  The whole gating system adopts the form of variable cross-section, that is, the gating system gradually shrinks from the DC channel to the internal channel, so as to ensure that the zinc alloy liquid continuously fills the gating system and minimize the eddy current entrainment.
  喷嘴出口的浇口面积比出口大10%。
  The gate area of the nozzle outlet is 10% larger than that of the outlet.
  (1)直跑
  (1) straight run
  1)直浇道断面收缩率在5% ~ 10%之间。
  1) The reduction of sprue section is between 5% and 10%.
  2)从直浇口到横浇口沿金属液流方向的弯曲处,截面积减少10%-30%。当转弯半径R<10mm时,减小30%;当R>为15mm时,降低了10%。转弯半径越大,阻力越小,压力损失越小。
  2) From the straight gate to the transverse gate, the cross-sectional area is reduced by 10% - 30%. When the turning radius r < 10 mm, it decreases by 30%; when r > 15 mm, it decreases by 10%. The larger the turning radius, the smaller the resistance and the smaller the pressure loss.
  3)生产中经常出现设计缺陷。问题在于:(1)直流道截面积的增大导致空气与液态金属混合,增加了铸件中气孔的机会。使液态金属流动不稳定。
山东铝合金压铸
  3) Design defects often appear in production. The problems are as follows: (1) the increase of the cross-sectional area of the DC channel results in the mixing of air and liquid metal, which increases the chance of porosity in the casting. Make liquid metal flow unstable.
  1型:双直流道。
  Type 1: double DC channel.
  2型:小型铸造笔尖直流道。
  Type 2: small casting pen point DC channel.
  (2)跑步运动员
  (2) Runner
  流道与内流道之间的连接通常采用梯形截面形状,成10°~45°角。
  The connection between the flow channel and the inner flow channel is usually trapezoid cross-section with an angle of 10 ° ~ 45 °.
  设计转轮时应考虑转轮的截面形状(几何形状)。对于给定的横浇道截面积,所选择的几何形状应具有更小的周长,因为随着横浇道周长的增大,液态金属的速度损失和温度损失增大,填充时间增大,不利于填充。
  The runner section shape (geometry) shall be taken into account when designing the runner. For a given cross-sectional area of the runner, the selected geometry should have the minimum perimeter, because with the increase of the perimeter of the runner, the speed loss and temperature loss of the liquid metal increase, and the filling time increases, which is not conducive to filling.
  (3)三角连接区域设计
  (3) Triangle connection area design
  三角形区域的主要功能是将一条主河道分成两条支流,或将一个型腔填满,或将一个型腔填满若干区域。三角形区域的几何形状和尺寸被很好地设计,使得浇口的横截面积逐渐向液态金属流动方向减小。树枝弯曲成一条椭圆曲线以减少阻力。使用圆角控制压力损失在10-20%;减少液态金属流经三角形的距离;减少分支通道中滞留的空气量。
  The main function of triangle area is to divide a main channel into two tributaries, or fill a cavity, or fill several areas with a cavity. The geometry and size of the triangle area are well designed, which makes the cross-sectional area of the gate gradually reduce to the direction of liquid metal flow. The branches bend into an elliptical curve to reduce resistance. Using fillets to control the pressure loss in 10-20%; reducing the distance of liquid metal flowing through the triangle; reducing the amount of air trapped in the branch channel.
  主河道断面面积/两条支流断面面积= 1.3~1.5。
  Cross section area of main river channel / cross section area of two tributaries = 1.3 ~ 1.5.
  (4)内浇口和缓冲器
  (4) Internal gate and buffer
  当转轮部分逐渐减小时,速度增大。在填充内浇口时,为了减小金属液对内浇口端部的高速冲击,设置了缓冲器以减小冲击,同时接受冷的金属液,并阻挡气体。
  When the runner part decreases gradually, the speed increases. In order to reduce the high-speed impact of the liquid metal on the end of the gate, a buffer is set to reduce the impact, while accepting the cold liquid metal and blocking the gas.
  以上就是山东铝合金压铸对浇注采用的形式的详细介绍,想要了解更多请点击官网http://www.jnhjgs.cn
  The above is a detailed introduction to the casting form of Shandong Aluminum alloy die casting. For more information, please click http://www.jnhjgs.cn
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