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BF换档锁板精冲工艺与模具设计(含CAD零件图装配图)

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BF换档锁板精冲工艺与模具设计(含CAD零件图装配图)(任务书,开题报告,论文说明书12000字,CAD图13张)
摘要
本文研究对象是一个某汽车变速箱零件BF换挡锁板,材料35钢、厚度5mm、最大孔径15mm、最小孔径6mm、周界640mm、公差等级T7,偏中小件,零件形状成扁平板状,边缘结构稍复杂,需要冲裁工序较少;就其结构特点及精度要求选择了精密冲压方案,设计精冲模具及诸多零件结构,借助三维建模软件PROE对BF换挡锁板以及反压板、凸凹模、凹模、V形齿圈进行建模,借助数值仿真分析软件DEFORM针对精冲过程进行了三维数值模拟,着重关注剪切面质量即光洁面占比、塌角及毛刺等,分析了影响质量的冲裁速度、冲裁间隙、齿圈齿形参数、反压力压边力、凸模凸凹模的刃口圆角半径等因素,设置多组数据进行仿真模拟,参考比较结果,筛选并制定了合理的精冲工艺方案,绘制总装配图和各零件图,所得结果对于精冲BF换挡锁板具有重要的指导意义。
关键词:精冲工艺;DEFORM;模具

Abstract
The research object of this paper is a certain automobile gearbox part BF shift lock plate, material 35 steel, thickness 5mm, maximum aperture 15mm, minimum aperture 6mm, perimeter 640mm, tolerance grade T7, small and medium parts, the part shape is flat plate, the edge structure is slightly complex. The blanking process is less, the precision stamping scheme is selected according to its structural characteristics and precision requirements, and the fine blanking die and many parts are designed. With the help of the three-dimensional modeling software PROE, the BF shift lock plate, the reverse pressure plate, the punch and concave die and the V-shaped gear ring are modeled, and the three-dimensional numerical simulation of the fine blanking process is carried out with the help of the numerical simulation analysis software DEFORM. This paper focuses on the quality of the shear plane, such as the proportion of the smooth surface, the collapse angle and the burr, and analyzes the factors affecting the quality, such as the blanking speed, the blanking clearance, the tooth profile parameters of the gear ring, the back pressure blank holder force, the edge fillet radius of the punch, and so on. Several groups of data are set up for simulation, and with reference to the results of comparison, a reasonable fine blanking process plan is screened and formulated, and the general assembly drawing and each part drawing are drawn. The results obtained have important guiding significance for fine blanking BF shift lock plate.
Key Words: Fine blanking process; DEFORM; die
 
工艺性分析
本次选题对象BF换档锁板是某型汽车变速箱中的关键零件,其精度与性能会极大的影响变速箱的使用寿命,因此冲压工艺分析必不可少。
首先零件形状及尺寸偏小,尺寸精度要求T7,中等精度要求, 要求剪切面光洁。由制件图可见R 5mm的1/4圆孔和 ϕ 15mm圆孔等处的尺寸要求很高,普通冲裁工艺难以达到的尺寸精度。另外该锁板材质:35钢,厚度5mm,查表可得35钢的可精冲最大厚度为8mm,抗拉强度 σb (MPa)≥530MPa,在精冲难度等级属于中等。由以上综合得出,该制件符合精冲件结构工艺性要求,适合精冲工艺进行加工。
 

BF换档锁板精冲工艺与模具设计(含CAD零件图装配图)
BF换档锁板精冲工艺与模具设计(含CAD零件图装配图)


目录
第1章绪论    1
1.1精冲技术背景    1
1.2精冲技术发展与应用    1
1.3精冲现状    2
1.4选题相关    3
第2章零件工艺分析    4
2.1工艺性分析    4
2.2确定精冲工艺方案    4
2.2.1精冲工艺计算    4
2.2.2工艺方案确定    5
2.2.3活动凸模式和固定凸模式精冲模比较    5
2.2.4选择合适的精冲机    6
2.2.5排样和搭边    7
第3章模具零部件设计    8
3.1齿圈    8
3.1.1齿圈作用    8
3.1.2齿圈设计    8
3.2凸、凹模间隙    9
3.3凹模和凸模设计    10
3.3.1凹模设计    11
3.3.2凸模设计    11
3.4传力杆    12
3.4.1设计要求    12
3.4.2载荷计算    13
3.5顶出装置    14
3.6反压板    14
3.7精冲模架    14
第4章数值模拟分析    15
4.1建模及导入    15
4.2精冲过程    16
4.2.1应力应变分析    16
4.2.2齿圈分析    16
4.2.3冲裁面质量分析    16
第5章结论    17
参考文献    18
致谢    20

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