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铝合金压铸怎么取得好的造型效果?

来源:六合历史开奖记录    发布时间:2019-12-06 13:15:55    点击:

随着社会的进步,工业的发展,山东铝合金压铸应用范围越来越广,我们前期也有介绍过铝合金压铸的操作过程的介绍,也会在过程中遇到一些问题,你要怎么解决呢!那么今天就由济南市宏捷模具有限公司带大家一起了解一下吧!
  With the progress of society and the development of industry, Shandong Aluminum alloy die casting is more and more widely used. In the early stage, we also introduced the operation process of aluminum alloy die casting, and we will encounter some problems in the process. How can you solve them! So today, Jinan Hongjie mould Co., Ltd. will take you to know about it!
  一、压铸铝件如何取得好的造型效果?
  I. how to achieve good modeling effect for die-casting aluminum parts?
 。1)对于压铸铝件中局部很厚的部位,在其上设置冒口要十分慎重,以防在原有热节的基础上再形成工艺热节,在局部很厚的部位,配用冷铁的效果往往要好于单用冒口的效果。
  (1) for the parts with thick local area in die casting aluminum, it is necessary to be very careful to set risers on them so as to prevent the process hot spot from forming again on the basis of the original hot spot. In the parts with thick local area, the effect of using cold iron is often better than that of using only risers.
 。2)对于网格类和隔板较多的压铸铝件,要避免产生浇不足的缺陷,除了要将内浇口对准网格或隔板的走向外,铸件本身的排气也是十分重要的工艺要素。
  (2) for the die-casting aluminum parts with more grids and diaphragms, in order to avoid the defect of insufficient pouring, in addition to aligning the inner gate with the grid or diaphragms, the exhaust of the casting itself is also a very important process element.
 。3)砂型铸造时,对于尺寸过大而无适用砂箱的铸件以及对于不止一个面有较复杂腔室的铸件,采用组型和组芯造型的方法能取得较好的效果。
  (3) in sand casting, for the castings with too large size and no suitable sand box, and for the castings with more than one complex cavity, the method of group mold and core mold can achieve better results.
 。4)组芯造型时,应把握好以下四方面,砂芯放置的稳定性;砂芯定位的准确性;组芯造型的可操作性;组芯与其他工艺要素的互容性。组型造型时,应在组型砂块外进行围砂,以防产生漏箱。
  (4) during core molding, the following four aspects should be grasped: the stability of core placement; the accuracy of core positioning; the operability of core molding; the compatibility of core and other process elements. During the formation molding, sand enclosure shall be carried out outside the formation sand block to prevent leakage.
六合历史开奖记录_山东铝合金压铸
 。5)对于通身壁厚较薄的环形或框形铸件,当浇注系统设置在铸件部位时,直浇口与横浇道圈之间的浇道做成折线形式,以防收缩时产生拉应力使铸件产生变形与裂纹。
  (5) for ring or frame castings with thin wall thickness, when the pouring system is set in the center of the casting, the sprue between the straight sprue and the transverse sprue ring is made into a fold line form to prevent the casting from deformation and crack due to tensile stress during shrinkage.
  二、压铸铝件要如何防止金属液在浇注过程中氧化?
  2. How to prevent the liquid metal from oxidation during the pouring process?
 。1)调整铁液含碳量和碳当量,适当提高球化温度并加强孕育处理,降低铁液黏度,改进铁液流动性;
  (1) adjust the carbon content and carbon equivalent of molten iron, increase the spheroidizing temperature and strengthen the inoculation treatment, reduce the viscosity and improve the fluidity of molten iron;
 。2)压铸铝件在保障球化前提下减少加镁量以降低球墨铸铁残留镁量;
  (2) on the premise of ensuring spheroidization, reduce the amount of magnesium added to the die casting aluminum to reduce the amount of residual magnesium in nodular cast iron;
 。3)用优良炉料熔炼球墨铸铁,降低原铁液含硫量及气体、夹杂物含量;
  (3) smelting nodular cast iron with excellent furnace charge, reducing the sulfur content of the original molten iron, gas and inclusion content;
 。4)采用挡渣效果好的浇包,浇注前铁液在浇包中停留足够时间,使熔渣和夹杂物充分上。
  (4) the ladle with good slag retaining effect shall be used. Before pouring, the molten iron shall stay in the ladle for enough time to make the slag and inclusions fully float;
 。5)采用保护性气氛熔炼和浇注镁合金,防止金属液氧化;
  (5) smelting and pouring magnesium alloy in protective atmosphere to prevent the liquid metal from oxidation;
 。6)压铸铝件浇注位置和浇注系统设置应保障金属液迅速平稳充满型腔,缩短充型流程;采用真空吸铸;
  (6) the pouring position and pouring system of die-casting aluminum parts should be set to ensure that the molten metal can fill the cavity quickly and stably, shorten the filling process, and adopt vacuum suction casting;
 。7)调整合金成分以提高其流动性,适当提高浇注温度和浇注速度,压铸铝件防止金属液在浇注过程中氧化,改进型砂和涂料成分以防止型壁与金属液发生化学反应,包内静置足够时间并加强挡渣,金属型铸造时适当提高型温;
  (7) adjust the alloy composition to improve its fluidity, properly raise the pouring temperature and pouring speed, prevent the molten metal from oxidization during pouring, improve the composition of molding sand and coating to prevent the chemical reaction between the mold wall and the molten metal, allow the ladle to stand for enough time and strengthen the slag retaining, properly raise the mold temperature during the casting of the metal mold;
 。8)易氧化合金钢在还原性或中性气氛中浇注;
  (8) easily oxidized alloy steel is poured in reducing or neutral atmosphere;
 。9)在浇注系统中,设置过滤网和集渣包;
  (9) in the pouring system, a filter screen and a slag collecting bag are arranged;
  以上就是由济南市宏捷模具有限公司压铸铝件如何取得好的造型效果及压铸铝件要如何防止金属液在浇注过程中氧化的介绍,希望可以帮到你!想要了解更多请点击官网
  The above is from Jinan Hongjie Mold Co., Ltd. how to achieve good modeling effect and how to prevent the oxidation of molten metal in the pouring process. I hope it can help you! For more information, please click
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