托盘物流及其发展趋势

托盘作为现代物流中的基本集装器具之一,对整合供应链发挥着重要作用.简述了托盘物流及托盘包装技术,并分析了托盘物流的现状及其发展趋势,提出了标准化、共用化及绿色化的要求.     

烧结机台车侧密封装置的开发与应用

为了解决烧结机台车端部漏风问题,研制开发了烧结机台车侧密封装置。该装置由膜盒、膜片、阻尼阀、杠杆联动机构、密封杆、密封材料以及限位支撑套等构成,通过台车底部的负压吸动膜盒的膜片产生位移,使密封材料自动压紧覆盖住台车端部的漏风间隙。生产实践证明,烧结机台车端部漏风率大幅度降低,年效益达2100万元。     

台车运行中故障的预防与应急处理

通过统计台车运行故障在烧结系统全部故障中所占的比例,指出了台车运行故障对烧结生产的危害。分析了烧结机台车运行中各种故障产生的原因,并提出了预防与应急处理方案,为事故的预防、发现、处理提供了具有可操作性的方法。     

刨花模压工业托盘的特点及主要物理力学性能

托盘是货物储运应用极其广泛的产品,用低质木质材料资源如小径木及其加工剩余物为原料,经高温高压并用环保型的、对人体无毒害的树脂生产出模压刨花托盘,可替代实木托盘.模压刨花托盘重量只有实木托盘的50 %.主要介绍刨花模压工业托盘的尺寸、吸水膨胀率、吸水率、托盘密度、托盘抗弯强度、支脚抗压强度和加强筋抗压强度等主要物理力学性能.     

固体润滑轴承在烧结机台车卡轮上的应用

简要介绍了固体润滑轴承的润滑机理，及其在烧结机台车卡轮上的应用情况。该技术在鞍钢、攀钢、莱钢、沙钢等厂烧结机台车上使用后，大幅度减少了台车的维护量．降低了生产成本，取得了良好的经济效益。     

The effect of pallet top deck stiffness on the compression strength of asymmetrically supported corrugated boxes

During unitized shipment, the components of unit loads are interacting with each other. During floor stacking of unit loads, the load on the top of the pallet causes the top deck of the pallet to bend, which creates an uneven top deck surface resulting in uneven or asymmetrical support of the corrugated boxes. This asymmetrical support could significantly affect the strength of the corrugated boxes, and it depends on the top deck stiffness of the pallet. This study is aimed at investigating how the variations of pallet top deck stiffness and the resulting asymmetric support affect corrugated box compression strength. The study used a scaled-down unit load compression test on quarter-scale pallet designs with different deckboard thicknesses using four different corrugated box designs. Pallet top deck stiffness was determined to have a significant effect on box compression strength. There was a 27%–37% increase in box compression strength for boxes supported by high-stiffness pallets in comparison with low-stiffness pallets. The fact that boxes were weaker on low-stiffness pallets could be explained by the uneven pressure distribution between the pallet deck and bottom layer of boxes. Pressure data showed that a higher percentage of total pressure was located under the box sidewalls that were supported on the outside stringers of low-stiffness pallets in comparison with high-stiffness pallets. This was disproportionately loading one side of the box. Utilizing the effects of pallet top deck stiffness on box compression performance, a unit load cost analysis is presented showing that a stiffer pallet can be used to carry boxes with less board material; hence, it can reduce the total unit load packaging cost.     

烧结球团台车国产化研究

通过实验室和大生产的热处理工艺研究,确定了获得贝氏体组织、热处理变形在５ｍｍ以下的生产方案,从而实现了台车的国产化。     

手推式电子叉车秤倾角与称重误差补偿算法研究

针对电子叉车秤在使用过程中出现的车体倾斜导致称重误差精度下降等问题,提出了一种有效的称重误差补偿算法。首先,分析电子叉车秤倾斜角度对称重性能的影响,搭建一个多方向可变角度倾斜的实验平台,以模拟叉车秤的倾斜状态并获取精确的称重数据。其次,根据所获得的数据与称重误差补偿原理,建立倾斜状态下电子叉车秤的称重误差补偿算法模型,并运用最小二乘法及多层感知机非线性回归方法识别模型参数。最后,本文对具有1 500 kg量程和0.02 kg感量的电子叉车秤进行了倾斜测试实验,结果表明,在地面倾角不超过1.5°的范围内,在任意倾斜方向仪器最大允许误差MPE<0.75 kg,具有3 000分度数的精度。     

基于改进CenterNet的托盘定位方法

目前, 托盘定位大多采用基于深度神经网络的目标检测算法, 一般使用矩形框进行托盘定位, 托盘中心点定位精度不高, 且无法有效估计托盘水平方向. 针对此问题, 本文提出了基于关键点检测的托盘定位方法, 通过检测托盘正面外轮廓的4个角点来定位托盘. 首先, 由于目前没有大规模的托盘数据集, 使用迁移学习的方法, 将CenterNet的人体姿态估计引入托盘定位任务. 然后改进关键点分组方法, 并提出关键点回归自适应补偿, 提高关键点检测精度. 在托盘关键点定位的基础上, 提出基于几何约束的托盘中心点计算和托盘水平方向估计方法. 本文方法与原CenterNet相比, 托盘关键点定位指标${{A}}{{{P}}^{{\text{kp}}}}$从0.352提高到0.728, 托盘中心点定位精度指标${{ALP}}$达到0.946, 并且可以有效估计托盘水平方向, 具有较高的实用价值.     

关于蜂窝纸托盘性能的研究与探讨

揭示和分析了我国新兴的蜂窝纸托盘出现的问题 ,重点讨论了影响蜂窝纸托盘质量的各种因素 ,并对现有各种蜂窝纸托盘提出了改进的建议。