KDF2滤棒成型机输送装置的优化设计

为满足细支卷烟的生产需求,对KDF2滤棒成型机进行改造。分析了改造后的KDF2滤棒成型机在生产细支滤棒过程中输送装置出现的问题,并对其进行了优化设计,降低了KDF2生产细支滤棒的停机时间,提高了设备效率。     

KDF2成型机组输出装置高位改低位设计分析

为解决KDF2成型机组生产异型滤棒时无法实时观察间隙及切断位置是否准确的问题,通过对接收鼓轮传送过程进行分析改造,基于齿轮的复合轮系及平皮带的运动原理设计了一种低位输送滤棒装置,进而在KDF2成型机组上实现了滤棒输出高位改低位的动作。该技术可为提高成型设备生产异型滤棒的合格率和卷烟产品质量提升提供支持。     

KDF2滤棒成型机设备参数研究

为改善KDF2成型机生产滤棒的质量稳定性,选用2.7Y/35000规格的醋纤丝束在KDF2成型机上对4个主要参数进行三水平正交试验。实验结果表明:稳定辊压力这一参数对滤棒单支重量、压降及硬度有显著影响,稳定辊压力在本实验的最佳设定值为0.08 MPa;螺纹辊压力对滤棒硬度的变异系数有显著影响,螺纹辊压力在本实验的最佳设定值为0.19 MPa;辊速比和喷嘴压力对滤棒质量的影响不显著,辊速比控制在1.15~1.35之间为宜。     

KDF2设备改进设计

KDF2滤棒成型机在生产醋纤颗粒基棒时,由于添加的多孔颗粒容易沾粘在滤棒搭口粘合剂热熔胶处,引起滤棒爆口,致使滤棒存在质量隐患甚至导致设备出现频繁停机,制约着设备的运转率。针对这问题,从热熔胶上胶系统、温度控制系统、负压入口等多方面探讨解决方案,改进设备。改进后的使用效果表明,采用改进设计方案有效地提高了设备的运行效率。     

滤棒直接加香装置的研究及应用

近年来,国内外应用加香滤棒的卷烟产品呈现出爆发式增长,各烟草企业加大滤棒加香工艺技术的研究力度,开发各种各样的加香滤棒,如混合加香、香料线加香、胶囊加香、复合棒加香等等,本文介绍一种直接加香装置和加香技术,不依靠任何载体,在KDF2成型机上能够将液体香料直接添加到滤棒中,生产出加香滤棒。     

解决KDF2成型机生产高透滤棒的爆口问题

KDF2成型机在生产高透气度品牌的烟支滤棒时,由于烙铁部分没有控温装置,容易出现热溶胶涂布不均匀,成型纸粘贴效果差的问题,致使设备出现频繁停机,制约着设备的生产效率。通过从温度自动控制的角度出发,增加一套KDF2成型部分控温装置和控制程序,实现了烙铁的自动控温功能,解决了设备因材料变换,造成设备频繁停机的问题。     

KDF2滤棒成型机组PLC电控系统的设计

分析KDF2滤棒成型机组电控系统存在的问题,设计了PLC控制系统,提高了系统稳定性,降低了设备故障率。     

高速爆珠滤棒成型机开松板的研究与应用

在卷烟制品生产中,滤棒是主要原料之一。丝束开松是滤棒生产中的主要工序,其开松效果直接影响着滤棒的吸阻,最终影响着卷烟的抽吸品质。常规卷烟的滤棒丝束开松采用单缝开松,能够满足卷烟生产工艺要求的需要,而爆珠卷烟在滤棒中加入了密封的爆珠,导致了滤棒吸阻大幅上升,对卷烟的抽吸品质造成了很大的影响。基于此,对KDF2开松板的长窄缝进行了研究,并对原有的开松板进行改进设计,采用双缝开松,明显提升了丝束的开松效果,解决了爆珠滤棒吸阻偏大的问题。     

基于爆珠植入装置加装循环冷却系统的开发与应用

国内现有爆珠滤棒成型设备,是近几年在KDF2滤棒成型设备基础上改造开发的设备,在使用过程中存在生产能力低、故障率高、原辅材料浪费大的问题。其中,核心功能部件:爆珠植入装置在生产过程中温度过高,造成爆珠有破损,就是制约爆珠滤棒成型设备向高速化发展的瓶颈问题之一。对爆珠植入装置加装循环冷却系统,通过调整冷媒温度和冷媒流量可使爆珠植入装置的温度控制在所需要的范围内,避免了爆珠因温度过高发生破损、黏连的情况,从而减少了爆珠滤棒的质量隐患和设备停机率。     

移动式滤棒混合加香装置的设计及应用

本文简要介绍了利用KDF2成型机在生产和试验混合加香滤棒过程中出现的料液混合不均匀,更换时料液剩余量大、增塑剂施加系统清洁费时费力等问题,通过设计一种移动式滤棒混合加香装置,并采用新的清洁方法,使料液混合均匀,提高加香滤棒的产品质量,并将更换料液时的料液剩余量比原来减少31.4kg,大大减少了料液的浪费,将系统清洁时间由原来的159min减少到27min,大幅减少清洁时部件的拆装工作,降低了人员劳动强度,提高了工作效率。     

Minimal Realization of Linear Graph Models for Multi-physics Systems

An engineering system may consist of several different types of components,belonging to such physical"domains"as mechanical,electrical,fluid,and thermal.It is t...     

INTEGRAL EQUATION METHOD＇S APPLICATION IN HOLE-EDGE STRESS OF COMPOSITE MATERIAL PLATE WITH DIFFERENT SHAPED HOLES

The strength of composite plate with different hole-shapes is always one of the most important but complicated issues in the application of the composite material. The holes will lead to mutations and discontinuity to the structure. So the hole-edge stress concentration is always a serious phenomenon. And the phenomenon makes the structure strength decrease very quickly to form dangerous weak points. Most partial damage begins from these weak points. According to the complex variable functions theory, the accurate boundary condition of composite plate with different hole-shapes is founded by conformal mapping method to settle the boundary condition problem of complex hole-shapes. Composite plate with commonly hole-shapes in engineering is studied by several complex variable stress fimction. The boundary integral equations are founded based on exact boundary conditions. Then the exact hole-edge stress analytic solution of composite plate with rectangle holes and wing manholes is resolved. Both of offset axis loadings and its influences on the stress concentration coefficient of the hole-edge are discussed. And comparisons of different loads along various offset axis on the hole-edge stress distribution of orthotropic plate with rectangle hole or wing manhole are made. It can be concluded that hole-edge with continuous variable curvatures might help to decrease the stress concentration coefficient; and smaller angle of outer load and fiber can decrease the stress peak value.     

Non-monotonic material contrast in scanning ion and scanning electron images

30 keV Ga⁺ focused ion beam induced secondary electron (iSE) imaging was used to determine the relative contrast between several materials. The iSE signal compared from C, Si, Al, Ti, Cr, Ni, Cu, Mo, Ag, and W metal layers does not decrease with an increase in target atomic number Z₂, and shows a non-monotonic relationship between contrast and Z₂. The non-monotonic relationship is attributed to periodic fluctuations of the stopping power and sputter yield inherent to the ion–solid interactions. In addition, material contrast from electron-induced secondary electron (eSE) and backscattered electron (BSE) images using scanning electron microscopy (SEM) also shows non-monotonic contrast as a function of Z₂, following the periodic behavior of the stopping power for electron–solid interactions. A comparison of the iSE and eSE results shows similar relative contrast between the metal layers, and not complementary contrast as conventionally understood. These similarities in the contrast behavior can be attributed to similarities in the periodic and non-monotonic function defined by incident particle–solid interaction theory.     

Application of Feature Extraction through Convolution Neural Networks and SVM Classifier for Robust Grading of Apples

This paper proposes a novel grading method of apples,in an automated grading device that uses convolutional neural networks to extract the size,color,texture,an...     

分布动态载荷识别的抗噪处理

针对正交多项式频域法在用多种响应对矩形薄板进行载荷识别中抗噪性较差的问题,综合运用平均法、矩阵预处理和奇异值截断法等方法对之进行改善,并引入空间映射的思想,将该方法的应用范围拓展为复杂的模型.利用仿真算例,证实了该方法具有较好的抗噪性.     

基于MELTAC-N平台的核电厂安全级DCS环网研究与测试

针对工程实践中环网通讯相关问题的处理缺乏理论基础及国产化安全级DCS平台的开发缺乏成熟经验借鉴问题,对基于MELTAC-N平台核电厂安全级DCS环网的软硬件实现进行了研究。提出了安全级DCS环网双环网冗余设计、光切换开关设计等硬件设计方法,以及以RPR协议为基础,采用全数据收发策略的软件设计方法。在CPR1000安全级DCS平台上对安全级DCS环网的可靠性及实时性进行了评价,并进行了容错能力、响应时间及响应时间稳定性测试验证实验。结果表明,基于MELTAC-N平台安全级DCS环网软硬件设计具有较好的容错能力及响应时间稳定性。     

Short-Term Relay Quality Prediction Algorithm Based on Long and Short-Term Memory

The fraction defective of semi-finished products is predicted to optimize the process of relay production lines, by which production quality and productivity ar...     

End-to-End Multiview Gesture Recognition for Autonomous Car Parking System

The use of hand gestures can be the most intuitive human-machine interaction medium.The early approaches for hand gesture recognition used device-based methods....     

The laboratory simulation of abrasive wear

Abrasive wear has long been recognised as one of the most potentially serious tribological problems facing the operators of many types of plant and machinery; several industrial surveys have indicated that wear by abrasion can be responsible for more than 50% of unscheduled machine and plant stoppages. Locating the operating point of a tribological contact in an appropriate operational ‚map’︁ can provide a useful guide to the likely nature and origins of the surface degradation experienced in use, though care must be exercised in choosing the most suitable parameters for the axes of the plot. Laboratory testing of materials and simulations of machine contacts are carried out for a number of purposes; at one level for the very practical aims of ranking candidate materials or surface hardening treatments in order of their wear resistance, or in an attempt to predict wear lives under field conditions. More fundamentally, tests may be aimed at elucidating the essential physical mechanisms of surface damage and loss, with the longer term aim of building an analytical and predictive model of the wear process itself. In many cases, component surface damage is brought about by the ingress of hard, particulate matter into machine bearing or sealing clearances. These may be running dry although, more usually, a lubricant or service fluid is present at the interface. A number of standardised wear test geometries and procedures have been established for both two- and three-body wear situations, and these are briefly described. Although abrasive wear is often modelled as following an ‚Archard’︁ equation (i.e. a linear increase in material loss with both load and time, and an inverse dependence on specimen hardness) both industrial experience and laboratory tests of particularly lubricated contacts show that this is not always the case: increasing the hardness differential in an abrasively contaminated lubricated pair may not always reduce the rate of damage to the harder surface.     

ANGULAR DISTORTION ALLOWABLE VALUE AND ASSESS METHOD OF WELD ON COKE TOWER

A graph as the new engineering method for estimate the safety of bulging deformation of coke tower is proposed. Through stresses analysis of circumferential weld of coke tower and comparing the stresses produced by pressure with heat stress of steady state, residual stress, bending stress produced by both itself weight and wind loads, it showed that the stresses produced by pressure on the angle distortion are the main factor of equivalent stress of the combined stress. After comparing four kinds of stress controlling conditions, the relation to stress with depth of angular distortion, grade of curvature of angular distortion and half of region of angular distortion has been inferred. Graph of deformation allowable value of coke tower for different condition by angular distortion and half of region of angular distortion has been plotted. The five steps for its engineering use have been explained. The lighter the grade of curvature is, the larger of bulge allowance, may be, and the bigger of depth of angular distortion may pose too. For the coke tower with a popular structure of Dg 5 400 mm×28 mm, the result by graph is nearly more than the result of two formulas formed by other research, the error is less than 7.0%. But, the graph can be easily applied to different size of angular distortion.