卷烟卷制参数变化对烟支物理质量的影响

分析卷烟卷制参数对烟支物理质量的影响,有利于提高卷烟卷制过程质量稳定控制。采用多元线性回归分析等方法考察了卷烟卷制参数与卷烟物理指标间的影响关系,并构建卷烟物理质量综合评价指数预测模型。结果表明,卷烟机梗导向板高度、抛丝辊间隙和针辊转速适宜的参数范围依次为61~67 mm、0.25~0.45 mm、950~1200 r/min。构建的卷烟物理质量综合评价指数预测模型可为优化卷烟机参数和卷烟卷制质量评价提供理论参考。

卷制工艺参数对中支卷烟物理质量的影响

为探究卷制工序工艺参数对中支卷烟物理质量的影响,通过对比和单因素方差分析烟支单支质量(重量)、平准器规格、梗签剔除量、回丝量、大风机风压等参数对中支卷烟常规物理指标及稳定性的影响.结果表明:烟支单支质量(重量)为0.66 g,平准器规格为3.0 mm×22.0 mm,梗签剔除量为80 g/min,回丝量为30%左右,大风机风压为-80~-90 mbar时,中支卷烟单支质量(重量)、吸阻稳定较好,空头率较低,烟支密度稳定较好,烟支密度轴向分布一致性较好.对于不同规格的卷烟加工过程,卷制工艺参数存在着相通且可借鉴的可能,同时由于规格的本质差异,卷制工艺参数也存在着显著区别.

基于三辊辊板机的制管基本参数性能分析

三辊辊板机作为结构钢管卷制中常用的设备,在钢管的预制中占有非常重要的地位,各钢管加工企业如何利用其现有的生产设备,发挥最大的工效成为制造加工企业关心的问题。通过对三辊辊板机的工作原理进行分析,并结合卷制时界定的钢管最大卷板厚度、卷制板材宽度、最小卷制直径以及被卷材料的屈服极限等4个制管基本参数进行性能分析,得出主要卷制技术参数相互间变化时的组合限制,最终得出一系列恒等变换等式,并通过具体算例进行演示,以此确定不同规格的钢管针对某特定辊板机是否可以卷制。

A Novel Cross-section Interpolation Method for Medical Images

Image interpolation of cross-sections is one of the key steps of medical visualization, and the cubic convolution interpolation is usually employed due to its good tradeoff between computational cost and accuracy, however, sometimes its accuracy can still not meet the requirement. Aimed at the problem, in this paper, the interpolation principle based cubic convolution is firstly analyzed systematically, and then essential relationship among the different cubic convolution interpolation methods is clarified. Lastly, a novel cross-section interpolation method for medical images that is based on the optimal parameter of sharp control is presented. The method takes full advantage of the local characteristic of medical images, and the optimized sharp control parameter is obtained by the iterative computation, and then the cross-section interpolation is performed by the cubic convolution with the optimized parameter in one time.The experimental results show that the method presented in the paper not only can improve the interpolation accuracy effectively, but also is robust.

卷烟动态吸阻及稳定性影响因素分析

为考察卷烟关键设计参数对卷烟动态吸阻及其稳定性的影响,建立了卷烟燃吸过程中动态吸阻稳定性和烟支间分布一致性评价方法,研究了烟支卷制参数、辅材设计参数及三丝掺配比例对卷烟动态吸阻及其稳定性影响。结果表明:在试验范围内,(1)随着烟丝宽度和单支质量增加,卷烟动态吸阻轴向稳定性下降;随着烟丝特征长度的增加,卷烟动态吸阻轴向稳定性增加;随着平准器槽深和槽宽的增加,卷烟动态吸阻轴向稳定性下降,烟支间分布一致性提升。(2)随着卷烟纸透气度的增加,卷烟动态吸阻轴向均值降低,卷烟动态吸阻轴向稳定性提升;随着滤棒丝束总旦数的增加,卷烟动态吸阻轴向均值呈增加的趋势,轴向稳定性提升,烟支间分布一致性下降。(3)增加膨胀烟丝与膨胀梗丝的掺配比例,卷烟动态吸阻轴向均值增加,轴向稳定性下降。