斜楔机构在汽车侧围外板翻边模中的应用

根据汽车侧围外板不同位置的翻边特点采用不同的斜楔机构成形,为解决侧翻边存在负角成形和取件问题,提出了3种新型斜楔机构,并介绍了侧围外板的冲压成形工艺和3种斜楔机构在侧围外板翻边模中的实际应用,可提高零件成形质量,降低模具开发成本。     

旋转斜楔应用浅析

通过1副整体侧围外板第三工序模具,介绍了一种旋转斜楔机构在模具中的应用,并分析此类旋转斜楔机构设计时遇到的问题。     

汽车侧围外板侧翻边双驱动滑车斜楔机构设计

通过对汽车侧围外板结构及成形工艺进行分析,设计了一种双插刀滑车斜楔机构实现汽车侧围外板成形,该机构先后驱动不同方向的滑车,实现了零件负角翻边,并在零件完成冲压后从Z向垂直取件,解决了侧围外板成形过程中起皱与缺料现象,提高了零件成形质量,对同类零件的模具设计具有一定的参考作用。     

汽车左右侧围外板成形方案及斜楔结构设计

分析了汽车左右侧围外板成形方案,并对后工序斜楔模具设计中用到的斜楔机构进行结构分析,运动分析,受力分析及其使用效果分析。从而为设计者提供一些斜楔机构的设计思路,更大程度地提高工作效率和质量水平。     

侧围顶梁翻边模结构设计

整体侧围外板是车身设计、制造中的最复杂的外覆盖件,本文重点阐述了侧围顶梁处侧翻边双活斜楔机构的设计注意事项,希望对提高侧围模具的设计水平有一些帮助。     

轿车侧围外板冲压成形工艺优化

通过分析轿车侧围外板结构特点及成形工艺过程,采用特殊的复合结构模具,通过修边与整形复合、直翻边整形与斜楔翻边复合及直翻边与斜楔冲孔复合,使轿车侧围外板冲压工序由5道减少至4道。经生产证明:优化后的冲压工艺可行,模具数量减少,缩短了模具生产周期,提高了生产效率,降低了制造成本,为类似冲压件的工艺设计提供了有益借鉴。     

模具固定回程氮气缸装置的结构改进

汽车双排整体侧围零件前支柱部位的形状是利用斜楔机构成形出来的,斜楔滑块的回程使用回程氮气缸,利用回程氮气缸的弹压力使斜楔滑块回到初始位置。本文对现有模具回程氮气缸和固定板经常脱开,斜楔回程滑块失效的原因进行了分析。对模具固定回程氮气缸装置的结构进行了改进,保证了回程氮气缸的稳固,保证了冲压生产的稳定。     

基于伺服技术的侧围外板材料降本方案

为了降低侧围外板材料成本,运用AutoForm软件对侧围外板拉深成形过程进行了数值模拟,研究了侧围外板成形过程中塑性变形与压边力加载方式和冲压速度的关系。当压边力和冲压速度呈阶梯式从大到小变化时,侧围外板能获得最佳的成形效果。通过将数值模拟与伺服技术相结合的方式,对侧围外板拉深成形速度曲线进行优化,实现了侧围外板材料从JAC270F-45/45到JAC270D-45/45的降级。结果表明,运用伺服技术后,材料切换为JAC270D-45/45的侧围外板成形良好,能满足侧围外板批量生产需求,可为整车节约制造成本52.6元/台。     

基于短工序化的侧围外板冲压工艺与模具设计

为了减少侧围外板冲压模具工序数量,降低新车型冲压模具投资,以某SUV车型侧围外板为例,通过对产品成形性和模具结构可实现性进行分析,设计了满足短工序化的冲压工艺方案。引入多种复合模具结构和特殊斜楔,实现了侧修边与侧冲孔、侧翻边与侧冲孔、侧整形与侧翻边等不同工艺内容的同序化,从而将侧围外板冲压模具工序数量由4道工序缩短至3道工序,并完成工业化应用。实践证明,短工序化工艺方案可有效削减模具工序数量,提高生产效率,降低模具开发及后期生产成本,满足侧围外板的批量生产需求,对于汽车行业冲压模具的工序优化具有一定借鉴意义。     

一种新型侧驱动压料机构

针对汽车覆盖件冲压成形模设计中侧整形与侧翻边的侧压料过程,提出了一种新型的侧驱动压料机构。与传统的侧压料机构相比,这种机构将固定在斜楔滑动块上的侧压芯安装在通过斜楔上滑块约束的主压芯上,优化了模具结构,降低了生产成本。将此机构运用在某车型侧围的侧整形部位,生产实践证明,机构切实可行,为其他侧压料的模具结构设计提供了参考。     

榨汁机外壳注射模设计

根据榨汁机外壳的结构特点和外表面不允许有滑块轮廓痕的技术要求,选择简化型三板模模架,在模具上设计了“圆形流道+扇形浇口”的进浇系统、定模滑块+斜顶的抽芯机构。选择圆形流道+扇形浇口进料系统,解决了塑件上的熔接痕和气泡等缺陷;选择简化型三板模模架,取消了模架上的推料板,由定模座板带动斜楔运动;在斜楔的两面设计斜面,解决了由斜楔带动滑块脱模的问题;将斜顶设计成“斜顶杆+“T”型槽+螺栓”的结构,解决了斜顶拆装难的问题;在动模座板的下表面安装顶出机构复位块代替复位弹簧,解决了顶出机构复位的问题。     

Effect of centrifugal rotational speed on wedge castability of titanium

This study examined the effects of the speed and force in centrifugal casting on the wedge castability of Ti-5 mass%Cu (Ti-5Cu) alloy and commercially pure titanium (CP-Ti). The Ti-5Cu alloy was prepared by argon-arc melting. Whole wedge-shaped acrylic patterns were prepared with either 15° or 30° angles and invested with a MgO-based material. The wedge specimens were cast using a centrifugal casting machine at rotational speeds of 600, 1000, 1250, 1500 and 3000 rpm. Mold filling, an index for a measure of castability, was determined as the missing length between the edge of the cast wedge and the theoretical acute tip of the triangle. CP-Ti was used as a control. An analytical model was developed to relate the mold-filling index to the surface energy and rotational speed. The experimental results indicate that the means of the mold-filling index of the 30° wedge angle were lower than those of the 15° wedge angle when compared for each corresponding metal and rotational speed. In each angle for CP-Ti, the means tended to reduce with increase in the rotational speed. The mold-filling index of 5% Cu titanium was found to be similar to that of CP-Ti, even for 15° wedge when the rotational speed was higher than 1250 rpm. The results suggest that dental prosthesis, which has narrow cross sections containing very narrow regions (for example, clasps of a denture), can be cast successfully by utilizing high rotational speed during centrifugal casting. The complex dependence of mold-filling index on wedge angle and rotational speed is explained on the basis of the analytical model and the dependence of the apparent surface energy on rotation speed.     

管材螺旋槽成形模具设计

采用冲压模具实现了管材螺旋槽成形.根据曲轴毛坯的特殊形状和成形工艺,在其螺旋槽成形模具设计中,使用浮动定位机构实现了曲轴毛坯在模具中的定位,依靠斜楔斜滑块机构完成螺旋槽成形,采用汽缸辅助斜楔斜滑块机构实现了成形凹模在模具中的定位与复位,并给出了螺旋槽工作尺寸的计算.该模具在生产中取得了良好的效果.     

带滚珠丝杠脱模及滚珠斜楔拉模定距装置的注射模

在螺塞注射模具设计中,采用了滚珠丝杠脱模装置和滚珠、斜楔拉模、定距联合装置,利用滚珠、螺母、丝杠及齿轮传动自动拧出螺纹塑件,实现塑件自动脱模;利用滚珠、斜楔、滑块机构拉开定模板和浇口板并控制其拉开距离,从而达到自动生产目的。     

一种异形管坯冲孔模具的定位机构设计

在冰箱压缩机的曲轴毛坯两端冲孔模具设计中,由于曲轴毛坯的特殊形状及生产工艺,曲轴毛坯在模具中的定位以及冲孔凹模的定位与复位存在一定的难度,本模具采用浮动定位机构解决了曲轴毛坯在模具中的定位,采用汽缸辅助斜楔斜滑块机构实现了芯棒凹模的定位与复位,并采用组合凸模部件防止冲裁废料的上跳,采用了大冲裁间隙,在生产中取得了良好的效果。     

一种新型的剪板机一立式剪板机

介绍了一种立式剪板机的结构和动作原理。该机借助简单的导料架辅机,适合长板料剪切,特别是双面覆膜的板料,用立式剪板机剪切效果更为理想。该机可旋转,以保证不同直径的卷板料。剪切端面平直,质量好。     

一种新型的剪板机-立式剪板机

介绍了一种立式剪板机的结构和动作原理.该机借助简单的导料架辅机,适合长板料剪切,特别是双面覆膜的板料,用立式剪板机剪切效果更为理想.该机可旋转,以保证不同直径的卷板料.剪切端面平直,质量好.     

电机壳冲压件全自动装盘设备研发

针对企业在电机壳冲压件装盘存在人工强度大,装盘效率低等问题,自主研发一种自动装盘设备。设备主要由提升筛选机构、装盘搬运机构、物料输送机构等组成,其中装盘搬运机构由定量装盘机构和升降搬运机构组成,实现了电机壳冲压件的规定数量装盘以及从料盘搬运至料盒的全过程动作,减少了人力,降低了制件生产成本,提高了装盘效率。     

Characterization of aluminum based functionally graded composites developed via friction stir processing

Al/SiC functionally graded material (FGM) was developed through a novel multi-step friction stir processing (FSP) method. SiC particles with a mean size of 27.5 μm were embedded in the groove on the 6082-Al plate. To create a graded structure over a predefined value, FSP was carried out with three tools with different pin lengths and with varying volume fractions of SiC particles. The structure was formed by passing tools with 1−3 passes with a constant rotational and traveling speeds of 900 r/min and 20 mm/min, respectively. The experiments were conducted at room temperature. Microstructural features of functionally graded (FG) samples were examined by using scanning electron microscopy (SEM) and 3D light microscopy. Mechanical properties in terms of wear resistance and microhardness were thoroughly assessed. The results indicate that the increase in FSP pass number causes more uniform SiC particle dispersion. The microhardness values were impacted by the number of passes and improved by 51.54% for Pass 3 when compared to as-received 6082-Al. Wear resistance of Al/SiC FG samples was found to increase as a result of the addition of SiC particles.     

一模四腔旋转自动脱螺纹压铸模设计

给出了罩壳零件旋转自动脱螺纹压铸模实用结构,锁模力计算和工艺参数,论述了模具工作原理和设计要点.该压铸模一模四腔,带有齿轮-齿条传动旋转自动脱螺纹型芯机构.该机构具有自动脱螺纹和推出铸件的双重作用,利用开模力使螺纹型芯旋转脱出,同时推出铸件,省去了推出机构和复位机构.模具结构紧凑,工作可靠,操作方便,劳动强度低,生产效率高.