管工艺与装备
35
锥段转鼓的立式离心铸造工艺
于宏斌,王小军2,张应龙3
1.海军青岛地区装备修理监修室,山东青岛266034;2.海装重庆军代局,重庆40002;
3.四川华星炉管有限公司,四川成都610300)
摘要:分析了常规立式离心铸造工艺生产锥段转鼓时,产生气孔、夹砂、缩凹等缺陷的原因;通过增加秒
芯的方法对常规立式离心铸造用铸型进行改进。生产结果表明:铸型中增加砂芯后,有效地控制了锥段转鼓的加
工余量,工艺出品率高,且生产的锥段转鼓无气孔、夹砂、缩凹等缺陷,无焊缝,可满足在特殊应用环境下对锥
段转鼓无缝化制造的要求。
关键词:锥段转鼓;立式离心铸造;砂芯;工艺出品率;缩四;气孔;夹砂
中图分类号:TC249.4文献标志码:B文章编号:1001-2311(2016)06-0035-05
Vertical Centrifugal Casting Process for Coned Drum
YU Hongbin, WANG Xiaojun',, ZHANG Yinglong
1. Qingdao Area Maintenance &Supervision Center, PLA Navy, Qingdao 266034, China
2. Chongqing Military Representative Bureau, PLA Navy Equipment Department, Chongqing 400042, China;
3. Sichuan Huaxing Centrifugally Alloy Tube Co, Ltd, Chengdu 610300, China
Abstract Analyzed here in the paper are the causes for development of defects like porosity, sand inclusion
and sink of the coned drum as made with conventional vertical centrifugal casting process. Accordingly, the casting
mould of the conventional vertical casting process is modified by means of adding the sand core. Result of the actual
operation shows that thanks to addition of the sand core to the casting mould, the machining allowance of the coned
drum is properly controlled, and thus the process yield is enhanced. Moreover, the coned drum itself as cast with the
Id is free of weld seam, and defects like porosity, sand inclusion and sink. This modified vertical
centrifugal casting process is capable of meeting the requirement for making seamless coned drum to be used under
special service conditions
Key words: coned drum; vertical centrifugal casting; sand core; process yield; sink; porosity; sand exclusion
近年来,伴随着离心分离机行业的飞速发展,为立式离心铸造;同时,由于锥段转鼓两端直径相
对离心分离机用锥段转鼓的制造要求也在不断提差大、高度高,在该立式离心铸造工艺中,采用增
高。锥段转鼓开孔削弱了其强度,开孔处有应力集加砂芯的方式,控制了锥形内孔加工余量,避免了
中现象,要求锥段转鼓无气孔、夹渣等缺陷。在厚壁处产生缩凹等缺陷,提高了工艺出品率,且生
特殊应用环境下,要求采用无缝化制造,以预防使产的锥段转鼓质量优异、无缺陷。
用过程中发生爆裂等危险,提高离心分离机使用
安全性。以往锥段转鼓多采用砂型铸造或卷板焊接1锥段转鼓的特性分析
成型,其缺陷多且质量难以保证。因此,四川华星1.1主要尺寸参数
炉管有限公司(简称华星炉管)将锥酘转鼓的制造改
以国外某离心分离机用大直径不锈钢锥段转鼓
为例,其铸件主要尺寸如图1所示(已包含加工余
手于宏斌(1979),男,工程师,从事舰艇的检测与维量)。该锥段转鼓铸件大部分内外圆均呈圆锥状,
护工作。
且直径相差大、高度高,不适合做成直段再进行机
STEEL PIPE Dec 2016, Vol 45, No 6
钢管2016年12月第45卷第6期
