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建立9.00R20轮胎模具的三维模型,为分析活络模具结构对轮胎温度场的影响,通过应用ANSYS Workbench有限元软件对轮胎活络模具温模过程进行了数值模拟分析,获得轮胎胎面的温度场分布,并据此提出改进模具的结构,解决轮胎胎面存在温差的现象.结果表明:与原模型相比,不同模具结构对轮胎温度场的影响不同,通过改进模具结构,使轮胎胎面的温差减小,同时缩短轮胎的硫化时间,节约能耗,降低成本. 相似文献
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介绍了圆锥面与斜平面轮胎模具的结构特点,以Y1188壳体9.00R20、12.00R20的2种规格模具为例,利用Abaqus软件对2种规格的圆锥面与斜平面轮胎模具进行传热模拟分析。结果表明:9.00R20规格的轮胎模具型腔温度分布要优于12.00R20规格的轮胎模具,斜平面轮胎模具型腔温度分布要优于圆锥面轮胎模具,与斜平面轮胎模具相比,圆锥面轮胎模具升温快,9.00R20和12.00R20规格的圆锥面轮胎模具分别比对应的斜平面轮胎模具达到轮胎硫化要求温度的预热时间减少26 min和20 min,模拟结果为合理的选择轮胎模具进行轮胎硫化提供理论指导。 相似文献
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斜平面模具底座耐磨板在闭模时起到支撑弓形座的作用,底座耐磨板磨损过大会导致侧板与花纹圈结合处出现错台,影响硫化轮胎的表面质量,底座耐磨板的形状大小也会影响模具传热过程中型腔内部的温度均匀性。通过对底座耐磨板的磨损和传热模拟分析可知:当底座耐磨板结构为梯形时,模具工作1.5万次时闭模瞬间磨损量可达0.083 mm,且花纹块上下点温差较大;当底座耐磨板结构为矩形时,模具工作1.5万次时闭模瞬间磨损量为0.32 mm,模具磨损量较大,但硫化时花纹块的温差较小。 相似文献
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利用Solid Works和ANSYS Workbench构建的协同仿真优化平台,对轮胎模具的重要零件弓形座进行静力学分析。分析了弓形座在一定压力状态下的应变,找到其工作的危险部位;运用ANSYS Workbench软件平台的DOE模块,以弓形座的3个主要尺寸作为设计变量,以其质量、最大等效应力作为目标函数进行优化设计;将活络模具结构更新,进行传热模拟分析,得到模具型腔内部的温度分布。结果表明:在满足强度条件下,改进后的弓形座重量减轻,模具型腔内部温差减小,有利于轮胎硫化的质量。 相似文献
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介绍了基于平板硫化机的摩托车胎活络模具结构设计,讨论了模具的开合模过程、开模行程及楔紧块的设计。针对模具在开模时会对子午胎钢丝帘线角度及间距的破坏,采用了活络模具并运用了顺序开模方式,不但减少了对轮胎的破坏,也延长了模具的使用寿命。 相似文献
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针对子午线轮胎模具的花纹特点,分析了高速铣削和电火花加工工艺的特点及其在轮胎模具制造中的优势和局限性,指出了选择轮胎模具加工工艺的基本原则,并针对不同类型的轮胎模具给出了具体的加工工艺选择方案,可为轮胎模制造企业在制定轮胎模具加工工艺时提供参考。 相似文献
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《International Journal of Cast Metals Research》2013,26(6):411-416
AbstractA rapid fabrication process was developed by combining stereolithography prototype, silicone rubber mould and vacuum casting process for zinc alloy moulds. Transfer coating mould was introduced as casting moulds reproduced from silicone rubber moulds. Vacuum casting process was applied to improve filling ability of complicated mould with fine pattern surface. Vacuum reduces the gas counterpressure in the casting mould cavity and then improves the filling ability. 相似文献
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Aiming at the cracking phenomenon of the thin shell mould in the expendable pattern shell casting during the pattern removing process, some systemic researches are presented.The influence of the pattern removing method and temperature on the pattern removing were investigated.The shell mould cracking mechanism was analyzed by using thermo-gravimetric analysis (TGA), and combining the temperature field and the volume change of the expanded polystyrene (EPS) foam pattern being tested.The results indicated that the shell mould was not easily cracked when the pattern removing process was carried out with the furnace being heated little by little because of the shell slowly shrinking with dehydration and shell strength gradually increasing.The shell mould was soon destroyed when it was set directly into the furnace at above 400 oC because of the thin shell mould rapidly shrinking and the foam pattern hindering.However, the shell mould had no cracking when it had been preheated for a long time even if the furnace temperature was above 400 oC and the shell was put into the furnace directly.Moreover, when the shell mould was directly set into the furnace at lower temperatures, 250 to 300 ℃, the shell would shrink slowly and the foam pattern would stay at the maximum expansion stage temperature of 100 to 110 ℃ for a long time; and the shell mould would experience an expansion force from the foam pattern for a long time.The expansion force is related to the pattern removing temperature, holding time, foam pattern thickness and density.Therefore, the foam pattern with higher density could make the shell crack. 相似文献
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《International Journal of Cast Metals Research》2013,26(1-4):246-250
AbstractIn recent years, global warming and environmental deterioration problems have drawn public attention. There is an ever increasing demand for production equipments in foundries that are more human friendly and environmentally cleaner. To meet such needs, a new type green sand moulding machine employing 'aeration' sand filling process has been developed. In order to make further improvements in moulding performance, new technologies, squeeze balance control and synchronised cope and drag pattern drawing technology, applied in squeezing and mould stripping process of the flaskless moulding equipment has been developed. Adoption of the squeeze balance control system achieves uniform mould strength and prevents distortion of pattern plates by automatically controlling the squeeze pressure applied to the cope and drag moulds in the squeeze process. This optimises the squeeze pressure according to the shape of the pattern. In this study the effectiveness of these technologies was proved by executing performance tests with an actual machine. 相似文献
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详细介绍了ZG40Cr大型支架铸件熔模铸造工艺的试验过程。通过多次试验及工艺改进,解决了包括母模拆分、组装、壳型制作以及浇注系统设计等一系列难题。试验取得的主要经验是:在生产大型复杂熔模铸件时,应注意调整母模的组合方式及蜡模表面的光滑度、制壳层数、风干时间、硬化时间、焙烧温度以及浇注温度等参数。 相似文献
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对轮胎模具电火花加工的型腔深度误差进行分析研究,提出了一种在线测量方法,利用数控系统对测量数据进行统计分析,并进行在线修整,提高了轮胎模具的型腔深度精度。 相似文献