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铝合金压铸件砂孔各种问题的解决方法

来源:http://www.jnhjgs.cn     发布时间:2020-04-27 16:41:28    点击:

1、气孔
1. Stomata
(1)卷入性气孔
(1) Entrapped stoma
原因:因为beplay全站app安卓型腔及料管(料筒、熔杯)内会有气体存在,在高速射出时,因为气体来不及排出,被紊流的铝合金包裹,存在于铸件内部,构成气孔;体现款式: 气孔内部存在压力,如加热铸件到220度左右,铸件外表会有凸起的泡泡,持续加热有时可能会有气泡声;剖开检测,孔规矩,内壁润滑,无金属光泽,有被气体 污染过的。
Reason: because there will be gas in the mold cavity and material tube (barrel and molten cup), when the gas is injected at high speed, because the gas is too late to be discharged, it is wrapped by turbulent aluminum alloy, and exists in the casting, forming the air hole; embodiment style: There is pressure inside the air hole, for example, when the casting is heated to about 220 degrees, there will be convex bubbles on the surface of the casting, and sometimes there may be bubble sound when the casting is heated continuously; when the casting is cut open for inspection, the hole is regular, the inner wall is lubricated, there is no metallic luster, and there is gas pollution.
解决办法
terms of settlement
a、想办法在压铸前将存在于beplay全站app安卓型腔中及料管中的气体排出,现在能够采用真空压铸,冲氧压铸等。
a. Before die casting, the gas in die cavity and tube can be discharged. Now, vacuum die casting and oxygen punching die casting can be used.
b、beplay全站app安卓上作文章,想办法将beplay全站app安卓型腔内的气体排出去。
b. The article is made on the mould to find a way to discharge the gas in the mould cavity.
c、压铸工艺上做文章,看不见的东西总是好的,一定当量的气体存在于铸件的某一处,一定是不良品,我们能够经过压铸的工艺将存在于一处的气体打散,分成 若干份,让气孔弥散。
c. In the process of die-casting, invisible things are always good. A certain amount of gas exists in a certain part of the casting, which must be a defective product. We can break up the gas existing in one part through the die-casting process, divide it into several parts, and let the pores disperse.
(2)分出性气孔
(2) Secretory stoma
原因:因为铝合金在由液体凝固成固体时,溶解在铝合金内部的H会分出构成氢气,这些氢气会留在铸件的内部构成孔洞。
Cause: when the aluminum alloy solidifies from liquid to solid, the H dissolved in the aluminum alloy will separate to form hydrogen, which will remain in the casting to form holes.
体现款式:剖开检测,内壁润滑,有金属光泽,会存在于铸件的任何地方。
Embodying style: split detection, inner wall lubrication, metallic luster, will exist anywhere in the casting.
山东铝合金压铸
解决办法:
terms of settlement:
a、严格控制铝液熔炼进程,禁止将湿润的、含有油污的回炉料投炉重熔。
a. Strictly control the melting process of aluminum liquid, and prohibit the wet and greasy materials from being put into the furnace for remelting.
b、铝液放置时刻不可超越6小时,需求定时的精炼、除气处理。
b. The aluminum liquid shall not be placed for more than 6 hours, and the refining and degassing treatment shall be carried out regularly.
c、关于熔炉,如超越3天不生产,建议收炉,不可让铝液长时刻放置不用。
c. As for the central furnace, if it is not produced for more than 3 days, it is recommended that the furnace be closed, and the liquid aluminum should not be put away for a long time.
d、在湿润气候,需加大精炼除气的频率。
d. In humid climate, the frequency of degassing should be increased.
(3)侵入性气孔
(3) Invasive stomata
原因:在压铸生产进程中,因为冲头、料管的润滑油的过多及水剂脱模涂料的未吹干,这些物质在触摸高温的铝液时会马上汽化,这些气体在beplay全站app安卓型腔内来不及 排出而侵入到铸件内部,构成孔洞。
Cause: in the process of die casting production, due to the excessive lubricating oil of punch and material pipe and the non drying of water agent release coating, these substances will vaporize immediately when touching the high temperature aluminum liquid, and these gases can not be discharged in the mold cavity and invade into the casting to form holes.
体现款式:存在于铸件的外表,有时在铸件的外表会有凸起的气泡出现。
Embodiment style: it exists in the surface of the casting, sometimes there will be raised bubbles on the surface of the casting.
解决办法:
terms of settlement:
a、 在生产进程中,beplay全站app安卓外表的脱模剂需吹干。
a. In the production process, the mold release agent on the surface needs to be blown dry.
b、严格控制冲头及料管的润滑油的用量,料头微黄即可。
b. Strictly control the amount of lubricating oil used for punch and material pipe, and the material head can be slightly yellow.
本文由山东铝合金压铸友情奉献.更多有关的知识请点击:http://www.jnhjgs.cn我们将会对您提出的疑问进行详细的解答,欢迎您登录网站留言.
This article is dedicated by Shandong Aluminum alloy die casting. For more information, please click: http://www.jnhjgs.cn. We will answer your questions in detail. Welcome to log in the website and leave a message
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