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冷风系统是玻璃器皿开模压机实现成型玻璃器皿制品的关键子机构,对保证玻璃器皿成型质量和延长模具使用寿命具有重要的作用。首先介绍了玻璃制品在成形过程中的温度分析及模具温度分析,并对冷风系统的工作原理进行分析。针对冷风系统的机构和功能特点,在深入研究实现机械产品快速设计开发的理论和基本方法的基础上,提出了玻璃器皿开模压机冷风系统的参数化设计的思想。在此基础上,详细阐述了基于Pro/E平台下,以Access 2003作为后台数据库,以Pro/TOOLKIT及VC++6.0作为开发工具对玻璃器皿压机的冷风系统进行参数化设计的过程。通过参数化设计方法,提高压机冷风系统的设计效率及质量。 相似文献
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陈启华 《机械工人(热加工)》1997,(4)
锻模工作时型腔表层受热温度达700℃左右,并承受急冷急热复杂应力作用,因此锻模常因软化变形、塌陷或开裂而早期失效。 我厂长期以来一直采用5CrMnMo作为锻模材料。因其高温强度较低,常因软化变形而早期失效。模具使用寿命较低,每年均要消耗大量的模具材料,同 相似文献
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《机械工人(热加工)》1976,(5)
手推车在改山治水、平整土地的群众性农业学大寨中是必不可少的。做手推车防尘盖的复合模一度出现寿命偏低的现象,影响了生产,为了急生产所急,我们在开门办学的过程中,在厂党委领导下,做了些工作,现小结如下: 一、模具受力情况图1是制造防尘盖的全套模具,我们主要解决上模的问题。模具在63吨冲床上工作,下料、挤压、成型、冲孔一步完成。所冲材料为1毫米厚低 相似文献
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刘安明 《机械工人(冷加工)》1999,(6)
我们在给一玻璃器皿厂加工一套模具时,其内孔的表面粗糙度值要求很低,如图1所示。由于工件内孔的形状特殊,给加工表面粗糙度R_α0.4μm的工件带来不便。 相似文献
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我国模具材料的应用及模具的表面强化技术 总被引:5,自引:0,他引:5
赵昌盛 《机械工人(热加工)》2005,(6):24-26
模具的使用寿命取决于正确的设计、制造和使用,但是模具材料本身的特性及表面强化带来的特性,也会严重影响模具的使用寿命。因此只要选择合适的模具材料并采取合理的表面强化技术才能充分发挥模具材料的各种性能,延长模具的使用寿命。 相似文献
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对客户提供的玻璃器皿样品尺寸进行三坐标测量,利用RP技术可制得样品的树脂原型,利用石膏模和树脂原型制备模具毛坯的型芯,采用中空的毛坯木模来造型,可快速得到玻璃模具的毛坯;利用RP技术可制得模具电火花加工电极的树脂原型,利用ZrO2熔模铸造技术及有限元模拟技术,对型壳的焙烧过程进行模拟,优化型壳焙烧工艺方案,为电极的制备提供了依据。采用以上工艺,可实现玻璃模具的快速制造。 相似文献
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I. K. Hui M. Hua H. C. W. Lau 《The International Journal of Advanced Manufacturing Technology》2003,22(11-12):786-795
Arc spraying has recently found its application in rapid mould making and is used predominantly as a technique for the production of the mould crust. In this paper, the influence of the spraying parameters, i.e. air pressure, loading voltage, wire feed rate, spraying distance and gun transverse velocity, on the resulting crust qualities such as the surface finish and bond strength, was investigated. Since the crust is built layer upon layer by the deposition of metal particles, particle morphology was found to play a key role in the resulting crust qualities. It was found that the particle morphology varies with the spraying parametric settings and their relationships were studied by using a Taguchi experimental technique. The results also show that air pressure is the prevailing parameter, followed by loading voltage, in determining the metal particle size, and that small particles with high deposition density lead to better bond strength. In addition, there is evidence showing that the combined effects of the particle morphology, particle impact force and particle temperature determine the resulting surface finish of the crust. 相似文献
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热喷涂快速制造模具技术新进展 总被引:9,自引:1,他引:8
采用热喷涂方法制造模具可以节省大量的时间和成本。这种方法可以制造各种塑料模具和多种拉延模具、冲压模具等。热喷涂快速制造模具技术与快速原型技术的结合是充分利用二者特点的先进模具制造技术之一。 相似文献
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郭维俊 《机械制造与自动化》2006,35(4):35-39
介绍了基于RP(快速原型)技术的金属电弧喷涂模具制造工艺流程;分析了金属电弧喷涂快速模具制造误差产生的来源;通过实例说明在模具制造的三个过程(即树脂原型、石膏型和电弧喷涂模具)中,以石膏型制造过程中产生误差的可控因素较多,例如不同水固比、不同烘干温度和添加不同填料后石膏固化时会产生不同的膨胀做缩率。通过选用合适的工艺参数,可以降低模具制造综合误差。 相似文献
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《Manufacturing Engineer》2002,81(3):129-133
Pressing itself was the first step to automation in the glass industry, but the job of automatically transferring a quantity of molten glass from the furnace to the moulds on an automatic press proved an obstacle to the complete mechanisation of the pressing process. it was not until 1915 that an automatic device for feeding a gob of glass to a mould on an automatic press was perfected in the USA. Fully automatic production of pressed glassware became feasible. The author gives an updated outline of the automatic production of pressed glassware 相似文献
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CVD金刚石具有优异的导热性能,在微电子热沉应用方面有着广阔的应用前景。利用ICP工艺制造了硅模具,利用有限元对CVD系统中硅模具的温度场和流场进行了研究,在硅模具内制备了小型精密CVD金刚石热沉片。试验结果表明模具法能够获得表面品质好、形状和尺寸精度很高的小型金刚石热沉片。 相似文献
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M. Hua C. C. Lau I. K. Hui J. Li 《The International Journal of Advanced Manufacturing Technology》2004,23(9-10):720-731
Repetitively prototyping several prototypes of the same component using currently available rapid-prototyping equipment can be very costly. Substantial savings can be attained with the use of a metal spray process to produce a crust shell on a rapid-prototyping pattern coated with mould release agent (PVA), and then backing the crust with aluminium granules so as to form rapid mould/tooling (RT). The smoothness of the innermost spray layer and its dimensional accuracy in relation to the RP prototype are factors that ensure good quality of parts replicated by RT. This paper establishes a preliminary model for predicting the upper bound of the former and the lower bound of the latter, which have been experimentally verified by arc spraying zinc onto PVA. The theoretical model permits the prediction of spraying parameters for controlling the achievable surface finishing and dimensional accuracy of a spray in RT production. 相似文献