摘要
总结了镁合金齿轮箱产品开发过程中压铸模的设计制造和压铸生产工艺方面的经验.该模具采用4个滑块,3个方向抽芯,主浇道采用环型结构、内部设辅助浇道,内腔结合处采用无毛刺的分型结构;模具制造中,采用先进加工设备保证GBIT6级的高制造精度;采用合理的镁合金压铸工艺,压射比压为10～16 MPa,增压比压为40～70 MPa,充填速度为40～60m/s,模具温度为220～280℃,浇注温度为640～690℃,充填时间为0.01～0.25s,保压时间为3～6 s.生产实践表明,模具结构和压铸工艺合理,压铸件成形好,压铸缺陷少,模具寿命长.
Experiences of design of die casting die for Mg alloy gear box and its die casting method were summarized.The die casting die uses four slide blocks and drawing-core mechanism in three direction,adopting ring structure for main ingate,setting additional ingate inside and smoothly part-separated structure in connection of cavity.Complicated working machine was used to ensure IT6 grade precision for die manufacturing.Rational die casting technology was employed to manufacture Mg alloy gear box including injected pressure for 10～16 MPa,applied specific pressure for 40～70 MPa,filling velocity at 40～60 m/s,die temperature at 220～280 ℃,pouring temperature at 640～690 ℃,filling time for 0.01～0.25,sand holding pressure time for 3～6 s.The practical verification indicated that good die structure and rational die casting method can be helpful to ensure good formation and few defects in die castings,extending the service life of the die.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2005年第9期544-545,共2页
Special Casting & Nonferrous Alloys
