轿车后保险杠内支撑架冲压工艺及模具设计.doc

轿车后保险杠内支撑架冲压工艺及模具设计

目  录
摘  要 I
ABSTRACT II
第一章 绪  论 1
1.1 本课题的研究目的及意义 1
1.2 本课题国内外研究现状 1
1.2.1 国内的研究现状 1
1.2.2 国外的研究现状 2
1.2.3 发展趋势 3
1.2.4 设计相关的背景知识 4
1.3 研究的重点 5
1.3.1 设计重点涉及的方面 5
1.3.2 本课题拟解决的关键问题 5
1.4 本论文的主要研究内容与思路 5
第二章 设计任务及产品图 7
第三章 零件的工艺性分析和方案的拟定 9
3.1 零件的工艺分析 9
3.2 工艺方案的拟订 9
第四章 主要工艺参数的确定 11
4.1 工件外形毛坯的设计 11
4.2 排样和材料利用率的计算 11
4.2.1排样方法的确定 11
4.2.2 确定搭边值 13
4.3 压力中心计算与确定 14
4.4 冲压力的计算 15
4.4.1 落料力的计算 15
4.4.2 切边力的计算 17
4.4.3 冲孔力的计算 18
4.5 间隙的影响 21
4.6 凸、凹模工作部分尺寸和公差计算 23
4.7 零部件的设计 29
4.8 设备的选用 33
4.9 模架的选用 35
第五章 模具装配的设计 37
5.1 导柱、导套的固定 37
5.2 上、下模座的设计 39
5.3 模具模柄的设计 42
第六章 模具总体结构及工作过程 43
6.1 模具装配的技术要求 43
6.2 模架的装配 44
6.3 总装 44
6.3.1 技术要求 44
6.4 试模 45
6.5 使用要求 46
第七章 结论与展望 47
致  谢 48
参考文献 49

摘  要
　　　模具工业是国民经济的基础工业。在现代工业生产中，产品零件广泛采用冲压、锻压成形、压铸成形、挤压成形、塑料注射或其它成形加工方法，与成形模具相配套，使坯料成形加工成符合产品要求的零件。许多产业部门(如机电、汽车、家电轻工、电器仪表、通讯、军械等)的发展依赖于模具工业的技术提高和发展。我国对模具工业的发展十分重视，国务院于1989年就将模具技术的发展列为机械行业的首要任务。充分说明了模具工业的基础性和重要性。
　　　本课题是针对轿车后保险杠内支撑架冲压工艺及模具设计进行分析设计，即冲压模具设计。零件形状较为复杂，且为一个对称零件。根据对零件的加工工艺及结构特点，设定一下工艺步骤：
落料
成形
切边
冲孔
　　　本课题通过分析了轿车后保险杠内支撑架的成形工艺，根据轿车后保险杠内支撑架的结构特点和技术要求，主要设计了一个成形模。本次设计的重点涉及冲压工序和冲模分类；常见冲压设备及工作原理、选用原则；冲压成形基本原理和规律；冲压成形性能及常见冲压材料；模具材料种类、性能、选用原则及热处理方法；模具制造特点、模具零件加工方法及应用等 。在分析冲裁变形过程及冲裁件质量影响因素的基础上，了解冲裁工艺计算、工艺方案制定和冲裁模设计、间隙确定、刃口尺寸计算原则和方法、排样设计、冲裁力与压力中心计算、冲裁工艺性分析与工艺方案制定、冲裁典型结构、零部件设计及模具标准应用、冲裁模设计方法与步骤等。冲裁模凸、凹模技术要求及加工特点，模具装配特点。
　　　
关键词：模具工业，冲压模具，轿车后保险杠内支撑架，成形

ABSTRACT
　　　Mold & Die Industry is the foundation of the national economy industry. In the modern industrial production, the product widely used parts stamping forming, die-casting, forging and pressing molding, extrusion forming, plastic injection or other forming method, and forming mold of supporting, make blank forming in compliance with the requirements of a product parts. Many industry department (such as mechanical and electrical, automotive, household appliances, light industry, electric apparatus, communication, weapons, the development of die and mould industry is dependent on the technology improve and development. Our country to the development of die and mould industry seriously, and the state council in 1989 to the development of the mould technology will be listed as the primary task of the mechanical industry. Fully explain the basic and the importance and mould industry.
　　　This topic is for car bumper after supporting frame in stamping process and die design analysis design, namely stamping mould design. Parts shape is more complicated, and for a symmetrical parts. According to the machining process of the part and the structure characteristics, set the process steps:
1. Dropping material
2. Forming
3. Trimming
4. Punching
    This topic through the analysis of the car was in the bumper brace after forming process, according to car bumper after the structure of supporting frame in characteristics and technical requirements, the main design a stretch forming dies. The design of the key involved punching process and die classification; Common punching equipment and working principle, the selection principle; Stamping basic principle and law; Stamping performance and common stamping materials; Die material types, properties and selection principle and heat treatment methods; Mould manufacturing characteristics, mould parts processing methods and applications. On the analysis of the deformation process and cutting blanking pieces factors affecting the quality of basis, understand the cutting process calculation, process scheme formulated and punch die design, sure, the blade gap size calculation principle and method, layout design, cutting force and pressure center calculation, cutting technology analysis and processing plan making, cutting the typical structure, spare parts design and die standard application, punch die design methods and steps, etc. Punch die convex, concave die technology requirements and processing characteristics, the mold assembly characteristics.
Keywords: Mold & Die Industry, After supporting frame in car bumpers
　　　　　　　Stamping die, forming