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铝合金下缸体压铸缺陷使用

来源:http://www.jnhjgs.cn/news/170.html发布时间:2018-01-22

第一,改进溢流槽结构。溢流槽具有排除型腔中的气体、 储存混有气体、 转移缩孔/缩松部位等作用。经过反复试验研 究,我们发现可以采用延长和增设溢流槽等手段改善缩孔、 气 孔等缺陷。
First, improve the overflow groove structure. The overflow slot has the effect of removing gas in the cavity, storing and mixing gas, transferring shrinkage cavity / shrinkage position. After repeated experiments, we find that the defects of shrinkage hole and gas hole can be improved by means of prolonging and adding overflow slots.
由于铸件中部缩松现象较多,溢流口如设置于大平 面上,填充压力将受到影响,所以通常选择竖形溢流口。
Because of the large shrinkage in the middle part of the castings, the filling pressure will be affected if the overflow is set on the large plane, so the vertical overflow is usually chosen.
第二,优化模具冷却系统。铸件缩孔一般会在局部温度过 高或壁厚过大的位置上出现。通过研究我们发现,两侧壁厚较 大的地方温度偏高,易引发缩孔。
Second, optimize the die cooling system. In general, the shrinkage cavity of the castings will appear in a position where the local temperature is too high or the wall thickness is too large. Through the study, we found that the temperature of the thicker sides of the wall is high, and it is easy to cause the shrinkage.

由于最初选用的最小点冷管 直径为12 mm,无法有效冷却上述位置,因此,我们对冷却水管 结构进行了改进,运用了高压冷却设备和内径4 mm的不锈钢 点冷管。我们将铸件两侧中部的模具型芯冷却至180 ℃左右, 大幅减少了缩孔现象,大大提高了铸件的品质。

山东铝合金压铸

Due to the initial selection of the minimum point cold pipe diameter of 12 mm, unable to effectively cool the above position, so we have improved the structure of the cooling water pipe, using the high-pressure cooling equipment and the inner diameter of 4 mm stainless steel point cooling tube. The mold core in the middle part of the castings is cooled to about 180 C, which greatly reduces the shrinkage and greatly improves the quality of the castings.
第三,改善镶嵌件分离现象。针对镶嵌件与铝合金铸件间 存在的分离现象,我们采取了以下手段:首先,使用稀释剂对 镶嵌件进行清洗,提高润湿性;其次,对镶嵌件实行定位孔检 查和外观检查,用钢丝对部分锈斑镶嵌件除斑;其三,对镶嵌 件进行预热试验,研究发现,当温度达到120 ℃以上时,可有效 解决镶嵌件分离问题。
Third, improve the separation of the mosaic. To insert and Aluminum Alloy casting separation phenomenon, we take the following measures: first, the inserts were cleaned using diluent, improve wettability; secondly, the positioning hole inspection and visual inspection to insert wire inserts on the part of rust spot removal; third, the research found that inserts preheat the test, when the temperature reached 120 degrees above, can effectively solve the problem of separation inserts.
本文的精彩内容来自: 山东铝合金压铸更多的精彩内容请点击:http://www.jnhjgs.cn
The wonderful content of this article comes from: more wonderful content of aluminum alloy die-casting in Shandong, please click: http://www.jnhjgs.cn

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