2A50负重轮液态模锻模具使用寿命分析及模具改进
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摘要
液态模锻成型是将定量的液态金属导入具有一定形状的下模中,用上模施压,使金属液在模具压力作用下充填到具有一定形状的模具中并在压力下凝固成型,从而得到结构致密产品的过程。分析了模具在使用过程中受到金属液的反复热冲击时其温度场的分布规律,以及如何通过调整模具结构并适当采取加热与冷却措施,调整模具内部的温度场分布,达到降低模具内部热应力的目的,进而减少模具因热冲击而造成的报废,提高模具的使用寿命。液态模锻模具散热过程的控制对提高模具寿命和生产效率具有决定性作用。
Liquid forging molding was a production method that put quantitative liquid metal into a definite shape under mould and press with upper mould,which could acquire fine-structure production by filling the liquid into a definite shape mould and solidifying at exterior pressure,so got production with compact texture.The rule of temperature distribution and how to adjust the mould structure by adopting the heating and cooling methods were discussed when the mould was thermal shocked repeatedly by metal liquid,with the adjustment of temperature distribution within the mould,the purpose of reducing the thermal stress of mould was achieved,which could decrease the scrap rate and improve service life of the mould.The control of heat emanation process of the liquid forging mould was crucial to enhance service life and production efficiency.
Liquid forging molding was a production method that put quantitative liquid metal into a definite shape under mould and press with upper mould,which could acquire fine-structure production by filling the liquid into a definite shape mould and solidifying at exterior pressure,so got production with compact texture.The rule of temperature distribution and how to adjust the mould structure by adopting the heating and cooling methods were discussed when the mould was thermal shocked repeatedly by metal liquid,with the adjustment of temperature distribution within the mould,the purpose of reducing the thermal stress of mould was achieved,which could decrease the scrap rate and improve service life of the mould.The control of heat emanation process of the liquid forging mould was crucial to enhance service life and production efficiency.
引文
[1]上海交通大学锻压研究组.液态模锻[M].北京:国防工业出版社,1981.
[2]齐丕襄.挤压铸造[M].北京:国防工业出版社,1984.
[3]陈利华,李顺,王长顺,等.轮盘总成的液态模锻工艺及模具设计[J].新技术新工艺,2015(7):1-3.
[4]赵恒义,周天西,袁燕.液态模锻工艺及发展应用现状[J].热加工工艺,2000(2):45-46.
[2]齐丕襄.挤压铸造[M].北京:国防工业出版社,1984.
[3]陈利华,李顺,王长顺,等.轮盘总成的液态模锻工艺及模具设计[J].新技术新工艺,2015(7):1-3.
[4]赵恒义,周天西,袁燕.液态模锻工艺及发展应用现状[J].热加工工艺,2000(2):45-46.