利用SLS技术烧制复杂液压阀体砂芯

余立华; 林少辉

doi:10.15980/j.tzzz.2012.09.013

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利用SLS技术烧制复杂液压阀体砂芯
Manufacturing Sand Core for Complex Hydraulic Valve Body by SLS（Selected Laser Sintering）
2012年32卷第9期页码：792-795
纸质出版日期： 2012 ，
DOI： 10.15980/j.tzzz.2012.09.013

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[1]余立华,林少辉.利用SLS技术烧制复杂液压阀体砂芯[J].特种铸造及有色合金,2012,32(09):792-795.

Yu Lihua, Lin Shaohui. Manufacturing Sand Core for Complex Hydraulic Valve Body by SLS（Selected Laser Sintering）[J]. Special Casting & Nonferrous Alloys, 2012,32(9):792-795.
[1]余立华,林少辉.利用SLS技术烧制复杂液压阀体砂芯[J].特种铸造及有色合金,2012,32(09):792-795. DOI： 10.15980/j.tzzz.2012.09.013.

Yu Lihua, Lin Shaohui. Manufacturing Sand Core for Complex Hydraulic Valve Body by SLS（Selected Laser Sintering）[J]. Special Casting & Nonferrous Alloys, 2012,32(9):792-795. DOI： 10.15980/j.tzzz.2012.09.013.

摘要

对多通道液压阀体砂芯的工艺过程进行了研究。采用SLS技术

生产出合格的砂芯。通过采用过140～70号筛的细宝珠砂做原砂配制覆膜砂

加入酚醛树脂

采用合适的烧结成形工艺参数

可以烧结出高强度砂芯。采用合理的铺粉机构

可有效减少铺粉过程对已烧结工件的扰动

明显降低烧结时的预热温度

从而减少由于热集效应导致的复杂砂芯难以清理的问题

提高砂芯的精度。

Abstract

Technological process of manufacturing sand core for multi-channel hydraulic valve body was described

and qualified sand core was produced by the SLS method.Through using fine pearlite sand as raw sand to prepare coated sand and adding phenolic resin with b proportion

high strength sand core can be sintered with optimized sintering parameters.Using proper spreading powder machine

the interference of spreading powder process on the sand core sintered can be decreased effectively

and pre-heating temperature during sintering process can be decreased also

which are beneficial for reducing clean difficulty of complicated sand core resulting from heat concentration and improving the precision of sand core.