基于Anycasting的滑块铸造模拟仿真及工艺优化

发布时间：2018-04-23 13:51

  本文选题：机床滑块 + 球墨铸铁　； 参考：《山东理工大学》2017年硕士论文

【摘要】：随着经济发展,我国正在由铸造大国转变为铸造强国,但是由此带来了能源消耗和环境污染等问题。随着铸造过程计算机数值仿真技术在实际生产中的应用,我国的铸造生产正朝向数字化、精确化、低能耗、高效率的方向发展。围绕这一方向,大量的科研成果正在以极高的效率投入到实际生产中,实现铸件在铸造过程的数字化、可视化,即可减少生产周期、保证铸造质量、降低生产成本,又可减少能源消耗、保护环境,最终实现经济效益与社会效益双赢。本文结合滑块铸件的结构特点、使用环境及实际生产条件,设计滑块铸件的铸造工艺,并采用铸造模拟软件Anycasting对铸件的铸造过程的温度场及流场进行数值模拟,并以此为理论依据优化铸造工艺,消除铸件缺陷。首先,利用三维建模软件对铸件进行实体建模,分析铸件的结构特点及使用过程中受力方式,确定铸件的材质及熔炼配料。然后,根据工艺设计原则,设计了分直浇道的阶梯式浇注系统,并在铸件导轨处设计冷铁,以确保此处的组织致密。最后,运用铸造模拟软件Anycasting对滑块铸件铸造过程进行数值模拟,探究铸件充型和凝固过程的温度场和流场分布规律,预测了铸造缺陷的发生位置及分布情况,并以此作为优化铸造工艺、消除铸造缺陷的理论依据。此外,通过正交试验法优化铸造工艺参数,提升铸件内部质量。试验结果表明,通过优化铸造工艺和工艺参数后,铸件在1320℃的浇注温度、40mm/s的入口浇注速度下,铸件充型过程快速、平稳、完整,基本符合“顺序充型”原则;凝固顺序合理有序,基本符合球墨铸铁“同时凝固”原则。同时,铸件内的缩(孔)松缺陷得到有效消除;导轨处的凝固时间合理,组织致密,满足实际生产对铸件质量的要求。
[Abstract]:With the development of economy, our country is changing from a big foundry country to a powerful foundry country, but it brings some problems such as energy consumption and environmental pollution. With the application of the computer numerical simulation technology in the foundry process, the foundry production in our country is developing towards the direction of digitalization, precision, low energy consumption and high efficiency. Around this direction, a large number of scientific research achievements are being put into actual production with high efficiency. To realize the digitization and visualization of castings in the casting process, the production cycle can be reduced, the casting quality can be guaranteed, and the production cost can be reduced. It can also reduce energy consumption, protect the environment, and finally realize the double-win of economic and social benefits. In this paper, the casting process of slider castings is designed according to the structural characteristics of slider castings, using environment and actual production conditions. The temperature field and flow field of casting process are numerically simulated by casting simulation software Anycasting. Based on this theory, the casting process is optimized to eliminate the casting defects. Firstly, the 3D modeling software is used to model the castings, to analyze the structural characteristics of the castings and to determine the material and melting ingredients of the castings. Then, according to the principle of process design, a step gating system is designed, and the cold iron is designed at the casting guideway to ensure the dense structure. Finally, the casting simulation software Anycasting is used to simulate the casting process of slider castings. The distribution of temperature field and flow field in the process of mold filling and solidification is studied, and the location and distribution of casting defects are predicted. It is used as the theoretical basis for optimizing casting process and eliminating casting defects. In addition, the casting process parameters were optimized by orthogonal test to improve the internal quality of casting. The results show that after optimizing the casting process and technological parameters, the casting filling process is fast, stable and complete at the inlet casting speed of 40 mm / s at 1320 鈩，

本文编号：1792233