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对多弯曲角工件。采用上下摆块式弯曲模。先摆动下摆块,使工件弯曲至一定阶段时。上摆块与下摆块再同时摆动至下极点,一次即可弯曲成多弯曲角工件。 相似文献
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介绍了一种组合型可调式弯曲模的结构。探讨了工作零件的设计和安装,同时也讨论了其凸、凹模调整垫片的设计方法和零件折弯成型过程。模具结构简单,具有实用价值。 相似文献
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本文介绍了用可滑动凸模与固定凸模相结合对圆筒形冲压件进行翻孔的方法,该模具结构简单、巧妙,生产效率高,对时间类产品具有一定的借鉴作用. 相似文献
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拉深无凸缘筒形件,由于拉深后筒口边部凸凹不平。采用移动式凸轮,在水平十字形四个方向使凹模浮动与固定的凸模形成相对的剪切刃口,将多余的不平整的边部切掉。每浮动一次切开圆周长的四分之一多一点,共浮动四次。 相似文献
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介绍了U形件弯曲模具的设计思路、模具结构及模具工作过程,阐述了活动凸模横向移动装置是一种较好的弯曲件脱模机构。 相似文献
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考虑到二次弯曲后的工件的取出的复杂性,在本设计中采用抽芯装置,仿照塑料模具的型芯特点,将弯曲凸模简化为型芯装置,通过气动装置把压力机冲裁信号转化为型芯的水平运动,滑块的上下运动和弹簧的弹压力是滑块水平运动的动力来源。本设计的难点是在二次弯曲的基础上还有局部成形及冲孔工序。零件的结构复杂性使模具结构上考虑用多工位级进模具,从而在满足零件图纸要求的条件下,节省模具材料与制造费用。 相似文献
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As an eco-friendly technology for pavement preventive maintenance, microsurfacing (MS) has the potential properties of cost-saving and excellent performance benefits in repairing distress. MS also improves the surface function, especially skid resistance, of old pavements that have gradually decayed under the coupled effects of long-term environment and loads. Reasonable assessments of the long-term skid and wear resistance of the MS can provide support for accurate decision-making on preventive maintenance, which in turn reduces maintenance costs and saves maintenance costs, and ensures traffic safety. To evaluate the long-term skid and wear resistance of MS in different natural and traffic environments, this paper investigated the change of British pendulum number (BPN), rutting depth, and mass loss rate of waterborne epoxy resin-SBR compound emulsified asphalt micro-surfacing (WER-SBR MEAMS) under different environmental factors and traffic conditions based on the self-developed accelerated loading abrasion instrument. The factors considered in the experiment include temperature, rainfall, UV radiation, speed, and load. The results showed that temperature and vehicle speed had a detrimental effect on the durability of WER-SBR MEAMS, which was more pronounced after 10,000 wear loading cycles. Reducing immersion time and slowing down the aging rate can improve the durability of WER-SBR MEAMS. Further, the influence degrees of different factors on the skid and wear resistance of MS were evaluated using the gray correlation method. From the results of the gray correlation analysis, the correlation coefficients between external variables and BPN, rutting depth, and mass loss rate are all greater than 0.8, which indicate that all the variables involved have relatively obvious and regular effects on the skid and wear resistance of WER-SBR MEAMS. 相似文献
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本设计以提高生产率及材料利用率为出发点,采用两套模具进行该启瓶器的设计:第一套级进模完成冲孔、拉深和落料;第二套模具为楔块式弯曲模,用来完成两次弯曲成形。这样既可以保证较高的材料利用率和生产率,又能够使模具的结构得到简化。 相似文献
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介绍了涂装滑橇的基本结构及定位方式;讨论了不同白车身尺寸的新产品在现有线体滑橇上的共用可能性。重点对新产品的定位孔形式、前后定位孔高度差对滑橇共用性的影响以及多个产品滑橇共用性进行了推理分析和计算,对降低主机厂生产成本、加速新产品投放市场有着十分重要的现实意义。 相似文献
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The advantages of manufacturing technology and operation of block lining of skid pipes and walking beams of a heating furnace
are presented. The economic desirability of selecting this type of lining is explained.
Translated from Novye Ogneupory, No. 3, pp. 60 – 65, April 2009. 相似文献
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溶聚丁苯橡胶SSBR 2305在轮胎胎面胶中的应用 总被引:4,自引:2,他引:4
采用国际标准基本配方和工厂实用胎面胶配方考察了锡偶联改性SSBR2305的物理机械性能,并以动态粘弹谱仪考察了该橡胶用于轮胎胎面胶时的滚动阻力和抗湿滑性。结果表明,SSBR2305的物理机械性能与ESBR1502的相近,SSBR2305硫化胶的物理机械性能完全可以满足实际应用的要求,SSBR2305表现出类似于ESBR1502和ESBR1712的高抗湿滑性能,同时又具有接近于NR和BR的低滚动阻力,在胎面胶研究配方中,SSBR2205可实现高抗湿滑性和低滚动阻力的良好平衡。 相似文献
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研究了一种带多种滑块抽芯三板式注塑模具及其特殊抽芯机构,针对产品形状比较特殊的情况及现有模具存在的技术问题,对模具结构进行了改进,浇注系统采用点浇口转侧浇口浇注方式,有效提高了模具模架的结构空间利用率;采用楔紧块+T型槽动定模分别抽芯的结合方式,有效降低了模具制造成本,提高了模具抽芯机构的工作可靠性;针对球孔抽芯位及内藏孔侧抽芯位的抽芯要求,采用多重带T型槽滑块联动抽芯方式,有效解决了产品复杂部位的高难度抽芯问题。结构设计简单合理,工作稳定、安全可靠。 相似文献