轻型卡车加强筋弯曲模设计 DESIGN OF BENDING DIE FOR REINFORCING RID OF LIGHT TRUCK 摘要 目前，在我国日常的工业生产中轻型卡车的使用范围很广，但在生产轻型卡车时，车厢加强筋使用量很大，并且在折弯机上加工时会出现弯曲困难，加工时间过长，损耗弯折机寿命等问题，对轻型卡车车厢的加强筋弯曲模进行设计，可缩短加强筋弯曲的时间，使成型效果更好，而且降低成本，有助于加快经济发展。因此本设计对现实生产生活有着重要意义。 首先分析了制造轻型卡车加强筋的材料的工艺性并确定了合适的尺寸，然后计算弯曲部分的最小弯曲半径，弯曲弹复角以及坯料的精确长度。最后，根据计算结果确定所要运用的弯曲工艺方案。从上述力的分析中，计算材料的弯曲应力并选择合适压力机。计算凹凸模的外形尺寸并确定其制造和组装精度，接着确定固定板和上下模座的尺寸。选择合适零件，如：顶件板，定位板和弹顶器等，并确定顶件板尺寸。基于上述数据最终确定了压力机的型号。最后，根据以上计算结果使用AUTOCAD绘图软件绘制模具的总装配图和部分重要零件的零件图。 关键词轻型卡车；加强筋；弯曲模；模具设计 Abstract At prese
nt, Light trucks are widely used i
n Chi
na's daily i
ndustrial productio
n, but the amou
nt of rei
nforci
ng rib i
n light truck carriage is large, be
ndi
ng o
n the be
ndi
ng machi
ne is time-co
nsumi
ng a
nd laborious, a
nd losses the service life of the be
ndi
ng machi
ne. the desig
n of the be
ndi
ng die of rei
nforci
ng rib i
n light truck carriage ca
n improve the formi
ng efficie
ncy a
nd formi
ng effect of rei
nforci
ng rib, a
nd the cost is low, which is helpful to accelerate the eco
nomic developme
nt. Therefore, the research of this topic is of great sig
nifica
nce to actual productio
n a
nd life. I
n this paper, the process a
nalysis was carried out accordi
ng to the material a
nd size of the light truck ribs. The mi
nimum be
ndi
ng radius a
nd the be
ndi
ng complex radius of the be
ndi
ng part were determi
ned a
nd the le
ngth of the bla
nk was calculated. Fi
nally, determi
ne the be
ndi
ng process pla
n. By a
nalyzi
ng the above forces, the be
ndi
ng stress of the material is calculated a
nd a suitable press is selected. Calculate the exter
nal dime
nsio
ns of the co
ncave-co
nvex mold a
nd determi
ne its ma
nufacturi
ng a
nd assembly accuracy, a
nd the
n determi
ne the dime
nsio
ns of the fixed plate a
nd upper a
nd lower mold seats. Select suitable parts, such as top plate, locati
ng plate a
nd ejector, a
nd determi
ne the size of top plate.Fi
nally, the model of the press was determi
ned based o
n the above data.Fi
nally, use AUTOCAD software to draw the assembly drawi
ngs of the mold a
nd the parts drawi
ngs of importa
nt parts such as male a
nd female molds. The desig
n of stiffe
ner be
ndi
ng die was fi
nally completed. Keywords light truck rib rei
nforceme
nt be
ndi
ng die die desig
n 目录 摘要I Abstract II 1绪论1 1.1设计的目的及意义1 1.2国内外的发展现状1 1.2.1模具发展现状1 1.2.3主要设计内容3 2零件的工艺性分析和实验方案论证4 2.1零件的工艺性分析4 2.1.1零件材料的选择4 2.1.2零件结构4 2.1.3最小许可弯曲半径4 2.1.4弯曲件的直边高度5 2.1.5对称性工件的圆角半径的设置5 2.1.6零件尺寸的精度5 2.1.7零件弯曲时的回弹6 2.1.8弯曲件展开长度的计算6 2.2弯曲工艺方案的确定及弯曲模结构的设计原则7 2.2.1弯曲工艺方案的论证7 2.2.2弯曲模结构设计原则8 3弯曲力的计算和压力机的选用9 3.1弯曲力的计算9 3.1.1第一阶段自由弯曲力的计算9 3.1.2第二阶段校正力的计算10 3.1.3顶件力的计算10 3.2弯曲时压力机压力的确定和压力机型号的初步确定11 3.2.1弯曲时压力机压力的确定11 3.2.2压力机型号的确定11 4弯曲凸、凹模设计14 4.1弯曲凸、凹模的间隙确定14 4.2弯曲模工作部分尺寸计算15 4.2.1凸凹模宽度尺寸的计算15 4.2.2凸、凹模的圆角半径确定16 4.3凹模外形尺寸设计16 4.4凹模强度校核17 4.5凸模设计18 4.6凸模强度校核18 4.7弯曲件凸、凹模深度及凸模两侧部分尺寸的确定19 4.8凸、凹模的固定20 4.9弯曲件凸、凹模材料的选用及热处理20 5.1固定板的设计计算24 5.1.1凹模固定板的设计24 5.1.2凸模固定板的设计25 5.2凹模垫板26 5.3顶件装置设计27 5.4弯曲模下模座的设计28 5.5定位零件的设计计算29 5.6弹性元件的设计计算30 5.8模具总装配图33 6压力机的最终确定34 结论35 致谢36 参考文献37