摘要
采用水模拟试验研究了工艺参数对低压铸造充型品质的影响。结果表明,随着加压速度的增大,升压-保压阶段拐点处液面波动振幅增加;而动力粘性系数增大,波动振幅反而减小。随着加压速度的增加,无论排气孔的面积有多大,液面上升延迟时间都有增加的趋势;型腔内背压逐渐增大,液面上升延迟时间逐渐增加。液面上升延迟时间随进气阻力增加而增加,进气阻力过大明显降低充型质量。
Effects of processing parameters on filling process in low pressure casting have been investigated by hydraulic simulation. It was revealed that with increasing the pressure-applying rate, the fluctuation of liquid surface is increased, while it is decreased with increasing the dynamical viscosity. In addition, with increasing the applying-pressure rate, the lifting-delay time of liquid surface can be raised regardless of how large of area of exhausted-pipe line. Increasing the anti-pressure in the cavity area and exhausted-pipe line section would extend the lifting-delay time of liquid surface, however, the very small section area is obviously detriment of filling process.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2007年第5期351-353,共3页
Special Casting & Nonferrous Alloys
关键词
低压铸造
水模拟
铸造充型
Low Pressure Casting, Hydraulic Simulation, Filling Process
