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偏位测头在齿轮齿形误差测量中的应用 总被引:1,自引:0,他引:1
在渐开线检查仪上,用一般测头测量大模数、少齿数、小齿轮和变位齿轮的齿形误差是难以实现的。这是由于仪器的测量滑架最大行程范围是随着齿轮基圆半径的减小而减小。当测量小直径基圆的齿轮时,测量滑架最大行程不足以使测头在齿面全长上全部移出。变位齿轮切削时,刀具的中线离开齿轮的分度圆使被切出的齿轮顶圆变大,齿顶变尖 相似文献
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基于半球形测头的自由曲面截形测量方法 总被引:4,自引:0,他引:4
提出的半球形测头测量自由曲面任意截形方法避开了用球形测头测量曲面的复杂过程和由此产生的三维测头半径补偿的数学模型及大量运算,消除了在三维曲面截形测量时由于被测曲面的扭曲对测头所造成的干涉,可使曲面测量直接转化为曲线测量,从而大大简化了测量和数据处理过程。 相似文献
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基于AutoCAD2000的螺旋面工件实体造型方法 总被引:1,自引:0,他引:1
陈芳 《成组技术与生产现代化》2003,20(2):12-15
实体造型是用作图法进行共轭曲面计算机辅助设计的基础,本文根据螺旋面的形成原理,利用Auto.CAD2000的实体造型、布尔运算等功能,对基于Auto CAD2000的螺旋面工件的实体造型方法进行了探讨,并建立了相应的数学模型. 相似文献
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本文提出一种从机械结构到测量原理均为创新的三维测微式测头。在±100μm的测量范围内,双向触测的总体重复精度目前可达到±0.43μm(OPTON三坐标测微式测头的总体重复精度仅为±0.5μm),且随测量范围的减小精度迅速提高。测力小于0.33N;测头体积较小,φ为90mm,高为14mm,使用性能好。 相似文献
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一种检测渐开线修形齿轮齿形误差的方法 总被引:1,自引:0,他引:1
本文提出了一种检测渐开线修形齿轮齿形误差的方法。它是以机械式单盘齿形检查仪为基础,配以位移传感器、专用数据采集卡和微机软硬件等所组成的一种计算机辅助检测技术。文中介绍了这一技术的检测原理和检测系统的软硬件构成及功能。 相似文献
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Abstract: Phase‐shifting digital holography is applied to measure the shapes and positions of rough surfaces from the averaged conjugate product of the reconstructed complex amplitudes, named complex coherence factor, corresponding to dual wavelengths. The phase of the averaged product at the object plane provides the shape of the surface, whereas the peak position of the modulus with respect to reconstruction distance provides the position of the surface. The phase is almost free from speckle noise and easy to be unwrapped. The resultant resolution of surface shape amounts to a few tens of micrometres. The sensitivity of the position measurement that requires no marking on the object is several per cent of object distance from a charge‐coupled device (CCD). The method corresponds to the detection of the position of maximum contrast of the fringes to be observed in conventional holographic interferometry. It makes use of fringe phase for shape measurement and fringe contrast for position measurement. Both the theory explaining the principle and experimental results are presented. 相似文献
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基于相位法的三维面型测量及曲面重建技术 总被引:1,自引:0,他引:1
文中采用相位法对三维面型测量和曲面重建技术进行了探讨,实现了三维信息获取和曲面重建的方法。该方法是用非相干光源投射的虚拟光栅和 CCD 摄像机构成的视觉系统对物体进行一次扫描获取物体表面的三维测量数据,这些数据经过处理后转换成*.ibl 文件,借助于 Pro/Engineer 软件重建三维物体表面。该方法快速、简便,适合于实时测量、加工,同时可实现测量、处理、加工的一体化,从而为反求工程的发展提供了一个很好的新方法。最后给出了实验,实验结果证明了方法的可行性和有效性。 相似文献
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Lucian Dascalescu Khouira Senouci Marius‐Cristian Plopeanu Alexandra Rotaru Sorin Cananau Karim Medles 《Quality and Reliability Engineering International》2014,30(4):601-611
The system currently employed for measuring the electric potential of the surface of textile fabrics consists in an electrostatic probe connected to an electrostatic voltmeter. The primary aim of the present work is to improve the capability of this measurement system, as evaluated by gauge repeatability and reproducibility studies. The experiments were conducted on samples of polypropylene non‐woven fabrics, electrostatically charged by exposing them to a negative corona discharge from a custom‐designed electrode system. A first series of fully operator‐controlled measurements pointed out the need to automatically control the relative position between the sample and probe, so that to eliminate the variability due to the non‐uniform structure of the non‐woven fabrics. The following series of partly automated experiments revealed that the repeatability and the reproducibility of the measurements are negatively affected by the decay of the electric potential at the surface of the samples. The best gauge capability is obtained when the measurements are delayed with respect to the moment of corona charging, in order to reduce the variability due to the fact that the samples characteristics change in time. Copyright © 2013 John Wiley & Sons, Ltd. 相似文献
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本文提出了一种新的三维物体面形测量方法。用硬件电路,实现结构光特征提取,然后对畸变光条分布进行总体面形拟合处理。处理中,可以获得物体在视场内附加了一个倾斜面的高度。整个物体面形可以通过减去这个附加倾斜面获得。 相似文献
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弹性元件式精密压力表广泛应用于生产领域的各行各业。计量检定是确保精密压力表量值准确的重要手段。但在检定前、检定时和检定结果处理的过程中仍有一些问题需要特别关注和注意,否则可能造成检定结果误判。 相似文献