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参数化成组技术在模具CAD系统中的应用 总被引:1,自引:0,他引:1
针对模具零件的特征,运用成组技术对模具零件进行了分析,并用人工智能语言编写了模具零件的参数化程序,运用参数化成组技术设计了模具CAD系统。 相似文献
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针对模具零件的特征,运用成组技术对模具零件进行了分析,并用人工智能语言编写了模具零件的参数化程序,运用参数化组技术设备了模具CAD系统。 相似文献
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此文在分析了拉深件零件的特点的基础,对其特征的信息构成进行了研究。采用成组技术,提出了一种特征编码的信息表达方式,该方式不仅可以方便地实现零件的自动工艺设计。而且还可实现零件的成组工艺模具的成组设计,从而缩短产品的生产周期,降低成本。 相似文献
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1.成组技术特点及应用成组技术(英文缩写为GT,即GroupTechnology)是一项可靠的基础新技术。它利用相似性原理将各种零件归并成组,然后进行成组处理。其主要内容包括成组设计、成组工艺、成组工装和成组加工等。成组技术具有系统工程的特点,主要适用于中小批量生产。经实际应用证明,成组技术具有技术的先进性和经济的合理性。本文以应用实例加以说明。随着消费水平的不断提高,产品的市场寿命周期相对缩短。为了实现产品的不断更新换代,以适应市场需求,为此必须加速产品的开发。这样,模具的产量也相应地增加。为了加速模具制造,我们将成组技术用于冲模设计,取得了技术经济的理想效果。其主要收获是 相似文献
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为有效整合企业管理,结合企业内部的管理体制和工作方式,介绍了成组技术的应用。成组技术是合理组织中小批量生产的系统方法,主要用于对零件进行分类与编码。详细介绍了采用成组技术对典型零件进行分类编码系统的结构和借助计算机进行自动分类的方法,对实践有一定的指导意义。 相似文献
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用工业CT测量物质密度的ASTM标准方法 总被引:1,自引:0,他引:1
介绍了美国ASTM标准中推荐的一种利用工业CT测量物体质量密度的原理与方法以及一个应用案例,显示了该方法较高的测量精度。该法可在工业CT的实际应用与系统性能测定中参考使用。 相似文献
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钣金件CAD/CAPP/CAM集成研究 总被引:1,自引:0,他引:1
本文介绍了钣金件CAD/CAPP/CAM集成系统的构成及其技术要点,提出了采用基于GT和特征的零件信息描述方法来实现CAD,CAPP和CAM的集成。 相似文献
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基于现场总线的PLC控制生产系统的监控系统 总被引:5,自引:1,他引:4
提出了一种用于镀膜生产控制的基于CC-Link现场总线和PLC控制的监控系统。PLC主要用于采集数据以及实现自动调节PID和连续控制策略。另外,带有人机界面的三菱GT Designer软件用于监控动态生产过程。 相似文献
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引入适量的硫可以明显改善铁基材料的摩擦学性能。采用粉末冶金技术制备了含硫高速钢样品材料,采用销盘高温摩擦试验机研究了该样品材料与不同配副(自对偶和GT35钢结硬质合金)摩擦时的高温摩擦性能,通过SEM、EDS和XPS检测了摩擦面,并分析了其摩擦机理。结果表明:与自对偶盘和GT35盘这2种对偶材料摩擦时,摩擦因数的变化趋势是随着温度的升高而逐渐降低的,磨损率则是随着温度的升高而逐渐变大的;在400℃和700℃时的摩擦因数曲线比室温时更加平稳,与GT35摩擦时样品材料的综合高温摩擦性能最佳;在400℃以下时,由于样品材料中硫化物的软化会使得材料的摩擦因数随着温度的升高而降低,在400℃以上时样品材料摩擦因数的降低主要是由于摩擦面的氧化物作用而引起的。 相似文献
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Initial bacterial adhesion on dental implant abutment is related to its surface chemical composition and physical characteristics.Selection of appropriate abutment materials resistant to bacterial adhesion is important for dental implant maintenance.The aim of present study was to evaluate the effect of different properties of abutment materials on initial bacterial adhesion in vitro.Polished zirconia(PZ group), polished titanium(PT group) and ground titanium(GT group) samples were prepared to simulate clinical dental implant abutments.Chemical compositions, morphology, roughness, hydrophilicity and surface free energy of materials were analyzed.Oral commensal bacterium Streptococcus mitis was used to evaluate initial bacterial adhesion via turbidity test and colony-forming unit counting.The results showed that GT group presented the highest roughness, hydrophilicity and surface free energy.After 6-h incubation, GT group showed the significantly highest adhered bacteria counts;while non-significant difference existed between PT and PZ groups.Within the clinically applicable range used in present study, the surface physical characteristics, instead of surface chemical composition, of dental abutment material have the pronounced influence on initial 6-h bacterial adhesion. 相似文献
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3D laser investigation on micron-scale grain protrusion topography of truncated diamond grinding wheel for precision grinding performance 总被引:1,自引:0,他引:1
J. Xie F. WeiJ.H. Zheng J. TamakiA. Kubo 《International Journal of Machine Tools and Manufacture》2011,51(5):411-419
A grain tip (GT) truncation is proposed to truncate grain protrusion tips of #270 diamond grinding wheel in plunge grinding of hard and brittle material. In this study, a 3D laser microscopy was employed to measure the wheel working surface and parameterize its 3D grain protrusion topography. The objective is to investigate how micron-scale grain protrusion parameters influence grinding performance such as grinding force and surface roughness. First, the GT truncation was performed after dressing of diamond grinding wheel in grinding experiment of quartz glass; then its 3D grain protrusion topography was constructed by smoothing 3D measured noise, matching measured point cloud, transferring protrusion frame and extracting 3D diamond grains; finally, the grain protrusion parameters such as grain protrusion number, grain protrusion height, grain protrusion volume, grain rake angle, grain clearance angle, etc. were investigated in connection with ground surface and grinding force. It is shown that GT truncation averagely decreases grain protrusion number, grain protrusion height, grain protrusion volume, grain rake angle and grain clearance angle by about 44%, 74%, 75%, 24% and 70% on whole wheel surface, respectively. However, it greatly increases active grain number by about 32 times and active grain volume by about 181 times in actual grinding with the depth of cut in 1 μm, thus leading to a decrease (about 80%) in surface roughness and an increase (about 40 times) in grinding force. It is also found that truncated diamond grain tips are mostly shaped with nanometer-scale tip wedges along grain cutting direction, leading to about 75% very large negative grain rake angles and about 75% large grain clearance angles, thus contributing to ductile-mode grinding. It is confirmed that the active grain number and active grain volume for the actual depth of cut may be regarded as main grain protrusion parameters to evaluate and predict the precision grinding performance of a coarser diamond grinding wheel. 相似文献
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测定了无润滑条件下氧化铝基陶瓷材料与钢结硬质合金GT35的摩擦磨损特性,并对磨损机理作了对比分析。结果表明:氧化铝基陶瓷材料的磨损曲线仅有跑合和稳定磨损两个阶段,磨损机理主要是脆性剥落以及磨粒磨损;而GT35却出现了类似金属材料磨损的三个阶段,即跑合、稳定磨损和剧烈磨损阶段。磨损机理是以碳化物粒子的断裂和脱落、磨粒磨损、剥层磨损以及粘着磨损为主。 相似文献