机械5

自行车脚蹬内板冲压工艺分析与模具设计 摘要 冲压模具类型中，级进模生产效率高，容易实现生产机械化和自动化，常用于在批量生产。 本文依据自行车脚蹬内板冲压落料模，冲压零件结构简单，精度要求不高，尺寸不大，属于常年大批量生产。经过结构分析和工艺分析，择优方案如下：采用多工位级进模生产，分别进行冲孔、翻边、整形、冲大孔、冲小孔、落料六道基本工序。零件材料为Q235，此材料塑性好，有一定强度，适用于受力不大的零件。除了凹、凸模之外，定位是级进模设计的重点，经过计算与比较，第一工位设置始用挡料装置、第二工位采用弹顶挡料销、其余工位采用导正销结合导料板进行定位，以保证定位的准确和冲压件的尺寸要求。并配合对角型导柱模架进行导向，以提高模具寿命和工作质量。此外，托料杆保证送料，弹性卸料板卸料，卸料力不太大并且冲压时可兼起压料作用。该级进模方案可以实现自动化生产，提高工作效率，并且降低成本，同时保证工件的生产要求。 关键字：冲压；级进模；冲孔；翻边；落料 Abstract I
n the differe
nt types of stampi
ng die, the progressive die is commo
nly used i
n mass productio
n because of high productio
n efficie
ncy, a
nd it is easy to impleme
nt mecha
nizatio
n a
nd automatio
n i
n the productio
n O
n the basic of the bicycle pedal board stampi
ng bla
nki
ng die, this stampi
ng parts has simple structure, the precisio
n of the part is
not too high, the size is
not big, shape is
not complex, a
nd it belo
ngs to high-volume productio
n. After the structural a
nalysis a
nd process a
nalysis, the fi
nal program has bee
n determi
ne, that is, the multi-positio
n progressive die is used i
n productio
n,
next, it respectively fi
nishes six basic processes i
ncludi
ng pierci
ng,fla
ngi
ng, shapi
ng, pu
nchi
ng the large holes, pu
nchi
ng the small holes a
nd bla
nki
ng. the material of the part is Q235which has good plastic a
nd certai
n stre
ngth,it is usually used for the partswhich is
not force heavily.I
n additio
n to the terrace die a
nd the lower die, positio
ni
ng is the focus of progressive die desig
n,. After calculated a
nd compared, the always-used trigger device is used i
n the first operati
ng statio
n, the trigger stop is used i
n the seco
nd operati
ng statio
n, the other statio
n use guide pi
ns toworkwith the guide plate for positio
ni
ngwhichwill e
nsure the accurate positio
n a
nd size requireme
nts of the stampi
ngs. diago
nal guide pillars die setwith spri
ng stripper is for guide to improve die life a
nd quality of theworkpieces. The holdi
ng pole is used to e
nsure the material feedi
ng, the spri
ng stripper to discharge, its discharge power is
not too large a
nd it ca
n bi
nder i
n the stampi
ng. This program of progressive die ca
n automate the productio
n, improve efficie
ncy a
nd reduce costs, at the same time, it ca
n e
nsure the productio
n requireme
nts of theworkpiece Keywords: stampi
ng ; progressive die ; pu
nchi
ng ; fla
ngi
ng ; bla
nki
ng 目录 引言1 1零件工艺分析及工艺方案的确定2 1.1零件结构分析2 1.2工艺方案分析及确定3 1.3冲压零件材料的选择4 2零件排样方案的确定及计算4 2.1排样方法4 2.2搭边和料宽5 3各工序中所需力的计算8 3.1翻边力的计算8 3.2冲裁力的计算9 3.3整形压力： 10 3.4卸料力、顶件力及推件力的计算11 4冲压设备的选择. 12 4.1压力中心的计算12 4.2冲压设备类型的选择12 4.3冲压设备规格的选择13 5模具主要尺寸的计算13 5.1翻边工序凸、凹模计算13 5.2各冲裁工位凸、凹模计算14 5.2.1冲裁间隙影响及合理选值14 5.2.2各冲裁工序凹凸模刃口尺寸计算15 5.3整形工序的凸凹模设计18 6冲裁模具主要零部件设计18 6.1凸模类型及长度计算19 6.1.1凸模的类型19 6.1.2各个凸模长度计算19 6.1.3各凸模的强度校核20 6.2凹模结构23 6.3定位零件24 6.3.1导料板24 6.3.2挡料销、导正销25 6.4卸料、托料装置： 26 6.4.1卸料装置26 6.4.2托料装置28 6.5模架及零件28 6.5.1模架28 6.5.2导柱、导套29 6.5.3模柄29 6.5.4垫板30 7模具材料的选用和热处理方法30 7.1凸模与凹模材料和热处理30 7.2冲裁模零部件的材料和热处理30 8模具的装配、调试与工作流程31 8.1模具的装配31 8.2冲裁模具的调试34 8.3最终方案级进模的工作过程概述35 9级进模工作流程及零部件工艺卡36 10总结40 谢辞41 参考文献42