共查询到18条相似文献,搜索用时 234 毫秒
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根据贴标机取标原理对回转式贴标机进行了工位分析,并在此基础上进行了取标凸轮过渡曲线的设计,归纳了设计过渡曲线的步骤,提出了设计过渡曲线时应考虑的三个要素。 相似文献
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通过对贴标机取标机构运动误差的分析,建立目标函数.对取标板的参数进行了优化设计;在对上胶工位运动要求分析的基础上,建立了取标板的自转角与中心转盘转角的函数关系;并在此基础上.根据凸轮齿轮的传动理论求出凸轮轨迹的向径,为贴标机取标机构的设计提供理论依据. 相似文献
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贴标机凸轮齿轮组合机构的研究 总被引:5,自引:2,他引:3
从机理方面对全自动回转贴标机的关键部件-上胶,取标、送标凸轮一齿轮组合机构进行了分析,得出该机构合理的设计方案,为设计贴标机提供理论依据。 相似文献
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回转式贴标机上胶工位凸轮曲线是上胶均匀性的重要影响因素,合理设计该凸轮曲线是保证贴标质量的关键。根据滚柱运动规律分析,设计一种新的上胶工位凸轮曲线,分析该凸轮曲线对取标板摆动均匀性和取标板与胶辊间隙值的影响。结果表明用五次项修正的等速运动规律设计的新型凸轮曲线能同时提高上胶过程中取标板摆动的均匀性并减小取标板与胶辊间隙值,提高上胶均匀性。 相似文献
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对自动贴标机的供标及收卷机构进行动力学分析,找出了影响恒张力的因素,并且对造成贴标机出标位置差异的供标及收卷机构部分进行了改进性设计,解决了当前贴标机贴标位置不够精确的难点,提高了贴标质量和效率,能够满足快速生产需求,提升市场竞争力。 相似文献
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在对贴标机取标机构分析的基础上,得出误差的所在,并以此建立目标函数,对取标版的参数进行优化设计;采用matlab软件编程计算,给出取标板的合理参数;并利用pro/e进行三维造型。 相似文献
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通过有限元仿真模拟了卷封工艺过程,分析了滚轮曲线各段对二重卷边所起的作用,并对4种曲线的卷封性能进行了分析比较,确定了性能最优良的卷封曲线,并对其进行了优化,从而得到理想的卷封曲线。 相似文献
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王成伟 《纺织高校基础科学学报》2012,25(2):204-208
构造了一组带有2个参数的四次多项式基函数,分析了这组基函数的性质.基于基函数定义了带有2个参数的多项式曲线.所定义的曲线不仅具有Ball曲线的特性,而且在控制顶点不变的情况下,随着参数的取值不同,可产生不同的逼近控制多边形的曲线.三次Ball曲线和相关文献中的曲线均是该文所定义的曲线的特例.运用张量积的方法,将曲线推广到曲面.应用实例表明,定义的曲线和曲面为曲线曲面设计提供了一种有效地方法. 相似文献
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用贝塞尔曲线拟合服装结构曲线的处理方法 总被引:2,自引:0,他引:2
尽管服装结构曲线类型很多,形态差别很大,但由于它们都要遵循服装结构设计的规律,因此具有许多共同特征,这使得同一种计算机曲线模型来拟合它们成为可能。本文通过分析服装结构曲线的这些共同点,讨论了如何用三次贝塞尔曲线对服装结构设计中可能遇到的各种类型的曲线,并概括了拟合这些曲线的一般处理方法。 相似文献
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柚、柑桔副产物利用的研究进展 总被引:1,自引:0,他引:1
柚子、柑桔的副产物包括果皮、种子等,富含多种功能成分,具有重要的开发价值。阐述了柚子及柑桔副产物中主要功能性成分的提取方法及其生物活性和药理特性,综述了国内外对它们开发利用的研究进展,旨在为柚子及柑桔副产物综合利用提供参考依据。 相似文献
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For the design of protective packaging for the distribution of fresh market peaches, it is important to determine the damage loss cost curve. This curve combines data on the frequency of drops in distribution as a function of drop height with the likelihood of losses occurring from damage resulting from impacts from specific drop heights. For fresh market peaches, externally visible bruises are the impact damage producing losses. In this study peaches of six cultivars were dropped onto a steel plate from heights in the range 8–38 cm. They were visually examined externally and internally for bruises and for fiber tears. Results were combined with data from a previous study covering the overlapping range of 31–91 cm. and used to calculate the damage loss cost curves for Redhaven peaches and for the composite of the six cultivars. The curves predict worst case losses in the 95% range for packages designed to protect against drops of 16 cm or less. Worst case losses decrease steadily with package designs ranging up to 46 cm where losses are in the 10–20% range. 相似文献
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L. Balint J. Momirovic M. Horvatic I. Vedrina 《Molecular nutrition & food research》1991,35(7):721-730
New criteria for the evaluation of wheat qualitative properties are worked out on the basis of the study of the shape and size of the extensographic curves. Approximating the experimental curves - extensograms - to the theoretical curves which are the closest to them in their shape and equal to them in their area, it also was possible to determine their shape parameters. The theoretical curve is an ellipse inscribed over the shape of the experimental curve. It changes its shape to the case when the ellipse eccentricity becomes equal to zero and further when x-axis and y-axis exchange their places in the coordinate system. It has been determined that the extensogram area can be the best means of measuring the wheat flour quality if it has been evaluated with reference to the curve circumference which circumscribes it. The ratio of the parameters of the theoretical curve maximum (mt) and the maximum of the theoretical curve of the ideal shape (r) is the basis for the extensogram evaluation and their classification into the qualitative range. The quantitative data of the ratio mt/r indicate the shape, and the values for r indicate the extensogram size. On the basis of the expression (mt/r-1)100, it is possible to evaluate accurately the extensographic curves for the first time as well as to classify wheat into the qualitative range. 相似文献