收放機架安裝支架建模和沖壓工藝及模具設計

模具論文編號:JX192  所有圖紙,開題報告,論文字數:10319.頁數:42

目  錄

1引言....................................................................4
1.1沖壓加工在生產中的應用 ...............................................4
1.2沖壓加工的優點 .......................................................4
1.3沖壓技術的發展方向 ...................................................5
1.4模具CAD/CAM技術...................................................... 5
2收放機架安裝支架工藝分析 ...............................................6
2.1零件工作狀況分析..................................................... 6
2.2零件工藝方案的分析和確定 .............................................7
2.2.1毛坯尺寸的計算 .....................................................7
2.2.2工藝方案的確定 .....................................................9
3落料——沖孔復合模的設計 ...............................................11
3.1沖裁件的排樣 .........................................................11
3.2搭邊值的選取 .........................................................12
3.3沖裁力、卸料力、推件力的計算 .........................................13
3.3.1 沖裁力的計算 ......................................................13
3.3.2卸料力的計算....................................................... 14
3.3.3推件力的計算....................................................... 15
3.3.4總的沖裁力的計算................................................... 15
3.4凸、凹模設計原則............................................... ......16
3.5沖孔凸凹模的設計..................................................... 16
3.5.1沖孔模刃口尺寸公差及凸、凹模間隙................................... 16
3.5.2沖孔凸、凹模工作部分的尺寸計算 .....................................17
3.5.3沖孔凸、凹模型式 ...................................................18
3.5.4沖孔凸模強度校核 ...................................................19
3.6落料凸、凹模設計..................................................... 20
3.6.1落料模刃口尺寸公差及凸、凹模間隙................................... 20
3.6.2凹模和凸凹模的尺寸................................................. 23
3.7其它零件的選擇及相關尺寸的確定 .......................................23
4彎曲模設計 .............................................................25
4.1彎曲力的計算 .........................................................25
4.1.1自由彎曲力的計算 ...................................................25
4.3彎曲模工作部分的設計 .................................................26
5斜楔沖孔模的設計....................................................... 28
5.1沖裁力的計算 .........................................................28
5.2 沖長圓孔的凸模與凹模工作部分的尺寸 ..................................29
5.3沖孔凸模強度校核..................................................... 31
5.4斜楔沖孔模的工作過程 .................................................32
5.5標準零件的選用....................................................... 33
6 U形彎曲模設計 .........................................................34
6.1彎曲力的計算......................................................... 34
6.1.1自由彎曲力的計算................................................... 34
6.1.2校正彎曲力的計算................................................... 34
6.2彎曲模工作部分的設計................................................. 35
6.2.1凸模圓角半徑 .......................................................35
6.2.2凹模圓角半徑 .......................................................35
6.2.4模具寬度尺寸....................................................... 36
6.3其它零件的選擇及相關尺寸的確定....................................... 37
7壓力機的選擇 ...........................................................37
結     論............................................................... 39
致    謝 ................................................................40
參 考 文獻 .............................................................41

摘     要:

       收放機架安裝支架是汽車上的一個結構零件，它是板料成形零件，采用的材料是SPHC。通過分析收放機架安裝支架的工藝性，確定了在技術上可行，經濟上合理的沖壓工藝方案，并且設計出生產此零件的全序模具。
通過對零件結構工藝性分析，設計中采用了四副模具來完成收放機架安裝支架的成形。第一副為落料—沖孔復合模，落料的同時沖出兩個小圓孔。落料—沖孔復合模的特點是工作效率高。第二副模具為彎曲模，由于有一個較大的彎曲半徑，所以在設計中主要考慮回彈因素對成形精度的影響。第三副為斜楔沖孔模，模具設計中采用了斜楔機構，沖出彎曲面上的長圓孔。最后一副模具也是彎曲模，用來彎曲兩邊。本次設計不但對模具總體結構進行了設計、還運用CAD軟件繪制模具裝配圖和零件圖。
設計中采用功能強大的模具CAD/CAM軟件UGNX作出零件的三維數值模型，不僅使零件看起來更加直觀，而且為模具的CAM提供了依據。同時對制件的沖壓工藝進行了設計并選擇了合適的壓力機型號。
 
關鍵詞:   沖壓工藝    模具結構   回彈   斜楔機構

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