制动卡钳铸件皮下气孔缺陷的防止

发布时间：2017-12-28 19:27

本文关键词：制动卡钳铸件皮下气孔缺陷的防止　出处：《现代铸铁》2016年01期 　论文类型：期刊论文

【摘要】：介绍了球墨铸铁制动卡钳的铸件结构和技术要求。693制动钳和812制动钳铸件均在DISA垂直分型挤压造型线上生产,原工艺生产的制动钳铸件经常由于皮下气孔报废。为查明废品原因,对2种制动钳铸件结构及皮下气孔废品率进行了对比,随后在不改变铸件结构的情况下,通过降低型砂水分和提高灼烧减量,消除了皮下气孔反复发生的现象,废品率稳定控制在1.5%以下,提高了铸件质量稳定性,降低了铸件生产成本。试验证明:选择适当的型砂水分并适当提高型砂灼烧减量,是防止制动卡钳皮下气孔反复发生的有效措施。
[Abstract]:The casting structure and technical requirements of the ductile iron brake calipers are introduced. 693 brake pincers and 812 brake clamp castings are produced on the DISA vertical type extrusion molding line. The original brake clamp castings are often abandoned because of the subcutaneous blowholes. In order to find out the reasons for rejection, 2 kinds of brake caliper casting structure and blowhole rejection rate were compared, then does not change in the casting structure, by reducing sand moisture and improve the ignition, eliminating the pinhole recurring phenomenon, the reject rate stability control below 1.5%, improve the quality of castings reduce stability. The production cost of castings. It is proved that it is an effective measure to prevent the repeated occurrence of the subcutaneous blowholes of the brake calipers by selecting appropriate moisture of the molding sand and improving the burning reduction of the molding sand.
【作者单位】：京西重工(上海)有限公司;山东惠宇精密机械有限公司;
【分类号】：TG255
【正文快照】： 皮下气孔是球墨铸铁件常见的铸造缺陷,型砂中的水分、砂芯中的树脂、熔炼过程中铁液吸收的气体以及耐火材料都是气体的来源,铸件浇注成形后发现的皮下气孔不易准确地判定其气体来源。常规的改善措施往往效果不太理想,皮下气孔反复发生的几率较高,是每个铸造企业都!!!!!!!!!!!!

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