机械5

摘要 根据任务书的要求，本次设计的工件为支撑桶，初步分析该工件的结构，可以看出该工件为圆筒型的拉深件，并且不带有凸缘，属于无凸缘拉深件，在整个工件的内部和表面有冲孔和翻孔，所以我们可以分析出该工件所需要的工序有落料，拉深，冲孔以及翻孔四个工序。在下文的叙述中，我将会首先对工件的工艺性进行分析，然后对拉深件的毛坯尺寸进行展开尺寸的计算，利用展开的毛坯尺寸进行排样图计算，算出材料利用率，然后对模具的冲裁方案进行选择，选择使用复合模或者级进模或者单工序模具进行设计。因为本次设计工序有落料，拉深，冲孔，翻孔四个工序，所以模具所需的冲压力有落料冲孔工序的冲裁力和拉深翻边工序的成形力，求和即为整套模具的冲压力，然后根据这个冲压力选择合适的相匹配的压力机，并且进行校核，然后又对冲裁和拉深的刃口尺寸进行了计算后，设计出了其余零部件，最后进行了整理和绘制装配图。 本次设计的难点在于拉深模具的计算，拉深工件的计算比较复杂，在进行设计模具之前需要对拉深次数进行计算，如果工件能够一次拉深成型，那么最优的方案即为复合模，一套落料拉深冲孔翻孔复合模即可成形，如果一次拉深工序不能够成形工件，那么即需要两套模具。选用合适的模架形式也是影响工件成品质量的关键，常用的模架形式有中间导柱模架，后侧导柱模架以及对角导柱模架等等。 关键词：落料；拉深；冲压力；压力机；模架。 Stampi
ng process a
nalysis a
nd die structure desig
n of support barrel parts Abstract: Accordi
ng to the requireme
nts of the task specificatio
n,the desig
nedworkpiece is a support barrel.After prelimi
narya
nalysis of the structure of theworkpiece,it ca
n be see
n that theworkpiece is a cyli
ndrical drawi
ng partwithout fla
nge,which belo
ngs to a fla
ngeless drawi
ng part.There are pu
nchi
ng a
nd tur
ni
ng holes o
n the i
n
ner a
nd surface of thewholeworkpiece.Therefore,we ca
n a
nalyze that the required processes of theworkpiece i
nclude bla
nki
ng,drawi
ng,pu
nchi
ng a
nd tur
ni
ng holes Process.I
n the followi
ng descriptio
n,Iwill first a
nalyze the process of theworkpiece,the
n calculate the bla
nk size of the drawi
ng part,use the expa
nded bla
nk size to calculate the layout,calculate the material utilizatio
n ratio,the
n select the bla
nki
ng scheme of the die,choose to use the composite die or progressive die or si
ngle process Die for desig
n.Because this desig
n process has four processes: bla
nki
ng,drawi
ng,pu
nchi
ng a
nd tur
ni
ng over,the pu
nchi
ng pressure required bythe die i
ncludes bla
nki
ng a
nd pu
nchi
ng force a
nd formi
ng force of the deep drawi
ng a
nd fla
ngi
ng process.The sum is the pu
nchi
ng pressure of thewhole die.The
n select the appropriate matchi
ng press accordi
ng to the pu
nchi
ng pressure,check it,a
nd the
n carryout the cutti
ng edge size of bla
nki
ng a
nd dras After the calculatio
n,the rest parts are desig
ned,a
nd fi
nallythe assemblydrawi
ng is arra
nged a
nd draw
n. The difficultyof this desig
n lies i
n the calculatio
n of the drawi
ng die.The calculatio
n of the drawi
ngworkpiece is relativelycomplex.Before the desig
n of the die,it is
necessaryto calculate the drawi
ng times.If theworkpiece ca
n be draw
n o
nce,the optimal scheme is the compou
nd die.O
ne set of bla
nki
ng drawi
ng compou
nd die ca
n be formed.If o
ne drawi
ng process ca
n
not form theworkpiece,the
n two sets of dies are
needed.The selectio
n of suitable mold base is also the keyto the qualityof fi
nished products.The commo
nlyused mold base forms are the middle guide pillar mold base,the back guide pillar mold base a
nd the diago
nal guide pillar mold base. Keywords:Bla
nki
ng; drawi
ng; pu
nchi
ng pressure; press; mold base. 目录 1绪论-1- 1.1研究的目的和意义-1- 1.2国内外研究发展状况-1- 1.3研究内容-2- 2支撑桶零件工艺性分析及工艺方案的确定-3- 2.1支撑桶零件工艺性分析-3- 2.2零件材料特性-4- 2.2.1特性-4- 2.2.2处理工艺-4- 2.3确定冲裁工艺方案-4- 3支撑桶冲压模具设计-6- 3.1计算毛坯尺寸-6- 3.1.1零件的修边余量-6- 3.1.2翻孔尺寸计算-6- 3.1.3计算毛坯尺寸-7- 3.2计算拉深次数-7- 3.3排样设计-8- 3.3.1搭边及其作用-9- 3.3.2搭边值的确定-9- 3.3.3步距-11- 3.3.4计算材料利用率-12- 3.4冲压力计算与压力机的选择-13- 3.4.1冲孔力的计算-13- 3.4.2落料力的计算：-13- 3.4.3卸料力的计算-14- 3.4.4拉深力的计算-14- 3.4.5模具总工艺力的计算-14- 3.5压力中心计算-14- 3.5.1压力中心的确定-15- 3.6校核冲压设备基本参数与选择-15- 3.6.1模具闭合高度的校核-15- 3.6.2冲裁所需总压力校核-16- 3.7冲裁间隙的确定-16- 3.8计算凸凹模冲裁刃口尺寸-17- 3.9拉深凸、凹模工作部分尺寸的确定-18- 4模具的零部件设计与选用-19- 4.1模具零部件结构的确定-19- 4.1.1冲孔凸模结构的设计-19- 4.1.2凹模结构的设计-20- 4.1.3凸凹模的的结构设计-21- 4.1.4卸料装置-23- 4.1.5模架和模座的选择-24- 4.1.6垫板及间隔板的设计-26- 4.1.7固定板的设计-27- 4.1.8螺钉的选用-27- 4.2.标准件的选用-28- 4.3模具整合-28- 结论-30- 参考文献-31- 致谢-32-