收放机架安装支架建模和冲压工艺及模具设计

论文编号:JX192  所有图纸,开题报告,论文字数:10319.页数:42

摘     要:

       收放机架安装支架是汽车上的一个结构零件，它是板料成形零件，采用的材料是SPHC。通过分析收放机架安装支架的工艺性，确定了在技术上可行，经济上合理的冲压工艺方案，并且设计出生产此零件的全序模具。
通过对零件结构工艺性分析，设计中采用了四副模具来完成收放机架安装支架的成形。第一副为落料—冲孔复合模，落料的同时冲出两个小圆孔。落料—冲孔复合模的特点是工作效率高。第二副模具为弯曲模，由于有一个较大的弯曲半径，所以在设计中主要考虑回弹因素对成形精度的影响。第三副为斜楔冲孔模，模具设计中采用了斜楔机构，冲出弯曲面上的长圆孔。最后一副模具也是弯曲模，用来弯曲两边。本次设计不但对模具总体结构进行了设计、还运用CAD软件绘制模具装配图和零件图。
设计中采用功能强大的模具CAD/CAM软件UGNX作出零件的三维数值模型，不仅使零件看起来更加直观，而且为模具的CAM提供了依据。同时对制件的冲压工艺进行了设计并选择了合适的压力机型号。
 
关键词:   冲压工艺    模具结构   回弹   斜楔机构

Abstract:

       The radio set`s bracket is a component of the automobile ,which also is a sheet deformed component .The material used in the design is SPHC .The main task is to determined the stamping Process of the radio set`s bracket , which  is economic and suitable on technique , according to  the analysis of the detail`s processibility. And then  design  all the dies used to deform the component .
  Four sets of dies are designed to deform this small component according to the analysis of the shape of the part and the the stamping Process of it .The first set is blanking and punching compound die .This compound die can punch the two small holes and blank at the same time .its trait is high working efficiency .The second set is bending die . Springback is considered in the  design of the bending die , since  there is a big bending radius .The third die is wedge clicker die .The slide wedge adjustment is adopted in the design ,which is used to  punch the hole on the bending surface deformed in the second step .The last set is bending die too , which is used to bend the two sides .This article  not only introduce the design of the integral construction of the dies ,but also use CAD software to draw the assembly drawings and the detail drawings of the dies in the design .
UG software is adopted in the design to draw the three-dimensional model of the component , which will not only look more intuitive , but also be used as a basis of the CAM .At the same time , analyze the stamping Process and select the suitable pressing machine .
Keywords: Stamping Process   Die Structure   Springback   Slide Wedge Adjustment

目  录

1引言....................................................................4
1.1冲压加工在生产中的应用 ...............................................4
1.2冲压加工的优点 .......................................................4
1.3冲压技术的发展方向 ...................................................5
1.4模具CAD/CAM技术...................................................... 5
2收放机架安装支架工艺分析 ...............................................6
2.1零件工作状况分析..................................................... 6
2.2零件工艺方案的分析和确定 .............................................7
2.2.1毛坯尺寸的计算 .....................................................7
2.2.2工艺方案的确定 .....................................................9
3落料——冲孔复合模的设计 ...............................................11
3.1冲裁件的排样 .........................................................11
3.2搭边值的选取 .........................................................12
3.3冲裁力、卸料力、推件力的计算 .........................................13
3.3.1 冲裁力的计算 ......................................................13
3.3.2卸料力的计算....................................................... 14
3.3.3推件力的计算....................................................... 15
3.3.4总的冲裁力的计算................................................... 15
3.4凸、凹模设计原则............................................... ......16
3.5冲孔凸凹模的设计..................................................... 16
3.5.1冲孔模刃口尺寸公差及凸、凹模间隙................................... 16
3.5.2冲孔凸、凹模工作部分的尺寸计算 .....................................17
3.5.3冲孔凸、凹模型式 ...................................................18
3.5.4冲孔凸模强度校核 ...................................................19
3.6落料凸、凹模设计..................................................... 20
3.6.1落料模刃口尺寸公差及凸、凹模间隙................................... 20
3.6.2凹模和凸凹模的尺寸................................................. 23
3.7其它零件的选择及相关尺寸的确定 .......................................23
4弯曲模设计 .............................................................25
4.1弯曲力的计算 .........................................................25
4.1.1自由弯曲力的计算 ...................................................25
4.3弯曲模工作部分的设计 .................................................26
5斜楔冲孔模的设计....................................................... 28
5.1冲裁力的计算 .........................................................28
5.2 冲长圆孔的凸模与凹模工作部分的尺寸 ..................................29
5.3冲孔凸模强度校核..................................................... 31
5.4斜楔冲孔模的工作过程 .................................................32
5.5标准零件的选用....................................................... 33
6 U形弯曲模设计 .........................................................34
6.1弯曲力的计算......................................................... 34
6.1.1自由弯曲力的计算................................................... 34
6.1.2校正弯曲力的计算................................................... 34
6.2弯曲模工作部分的设计................................................. 35
6.2.1凸模圆角半径 .......................................................35
6.2.2凹模圆角半径 .......................................................35
6.2.4模具宽度尺寸....................................................... 36
6.3其它零件的选择及相关尺寸的确定....................................... 37
7压力机的选择 ...........................................................37
结     论............................................................... 39
致    谢 ................................................................40
参 考 文献 .............................................................41