无 锡 职 业 技 术 学 院
毕业设计（论文）说明书
轮毂的铸造工艺及其热芯盒模具设计
摘 要
随着社会的发展，机动车辆在生产和生活中的越来越广泛。缸盖是机动车辆中的重要部件，其壳体的结构及加工精度直接影响轮毂的正常工作，因此研究轮毂的加工方法和工艺的编制是十分必要和有意义的。
本设计是对前轮毂零件进行铸造毛坯工艺设计。根据零件的使用条件、结构特点、生产批量，结合工厂现有设备等进行铸造工艺分析，确定了铸造方法、造型及造芯方法、凝固原则及浇注位置、分型面、砂箱中铸件数量、砂型数量等，完成了砂芯、浇注系统、冒口及冷铁、相关工装设备等设计。
本设计采用壳芯盒法制芯，根据芯子的形状及重量选用763射芯机进行射芯，采用酚醛树脂砂作为制芯材料。接着对壳芯盒本体进行设计，芯盒本体的设计主要包括芯盒的结构及分盒面的选择，射砂口的设计，芯盒材料的选择，芯盒中砂芯的数目，排气装置的设计以及芯盒顶出机构的设计。
关键字：砂型铸造，工艺分析，工艺设计，壳芯工装设计
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无 锡 职 业 技 术 学 院
毕业设计（论文）说明书
The Casting Technology and Hot Core Box
Mold Design of Hub
ABSTRACT
Along with social development, motor vehicle used in production and life is increasingly wide. Hub is an important vehicle component and its interior structure and processing precision directly affect the hub normal work. Study hub cast processing methods and techniques of preparation is necessary and meaningful.
This design is the casting technology design for front hub in vehicle. According to the application conditions, structural features, production batch and existing equipment, it determines the method of casting, modeling, core making, solidification principles and pouring position, parting surface, the quantity of casting and mold etc. It completes the design of sand core, pouring system, riser, chill and related equipment etc.
This design uses the shell core box making core. According to the shape and weight it choose 763 shoot core machine shoot core and use phenolic resin sand as the core making material. Then design the shell core box body, the core box body design mainly includes the core box structure and box surface selection, sand jetting port core box design, choice of materials, core box of sand core in number, exhaust design and installation of the core box lifting mechanism design.
KEY WORDS：sand casting，technology analysis，technology design，Shell core fixture design
II
无 锡 职 业 技 术 学 院
毕业设计（论文）说明书
目 录
前 言 .................................................................................................... 1 第一章 铸造工艺设计 ........................................................................ 2
§1.1 零件概述............................................................................. 2
§1.1.1 零件信息................................................................... 2 §1.1.2 技术要求................................................................... 2 §1.2 铸造工艺方案的确定 ......................................................... 3
§1.2.1 造型、造芯方法及铸型种类的确定 ....................... 3 §1.2.2 浇注位置和分型面的确定 ....................................... 3 §1.2.3 砂箱中铸件数目的确定 ........................................... 6 §1.3 工艺参数的选择 ................................................................. 7
§1.3.1 铸造收缩率............................................................... 7 §1.3.2 机械加工余量、铸件的尺寸和重量偏差 ............... 7 §1.3.3 拔模斜度的确定....................................................... 8 §1.3.4 铸造圆角的确定....................................................... 8 §1.3.5 最小铸出口及槽....................................................... 8 §1.4 浇注系统的设计 ................................................................. 8
§1.4.1 浇注系统的概述....................................................... 8 §1.4.2 浇注系统类型的选择 ............................................... 9 §1.4.3 浇注系统的设计与计算 ......................................... 10 §1.4.4 出气孔的设计......................................................... 13 §1.5 砂芯的设计....................................................................... 13
§1.5.1 砂芯的概述............................................................. 13 §1.5.2 砂芯数量的确定..................................................... 14 §1.5.3 芯头的设计............................................................. 14 §1.5.4 壳芯的制备............................................................. 15 §1.6 冒口及冷铁的设计 ........................................................... 15
§1.6.1 冒口的设计............................................................. 15
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铸造工艺毕业设计说明书
