热喷焊技术工艺设计及其应用

热喷焊在设备维修中得到了广泛的应用。为得到良好的喷焊层 ,热喷焊要根据基材性质和工作条件选择合适的喷焊材料 ,设计合理涂层结构。在喷焊过程中可采用一步法或二步法进行喷焊。热喷焊技术在设备维修工作中越来越发挥着重要作用     

定位焊在焊缝质量中的控制

定位焊作为焊缝中的一部分,其焊接质量的好坏将直接影响整条焊缝的质量,而在现实生产过程中定位焊却常常被忽视,就如何保证定位焊的质量进行了分析,总结了保证定位焊焊接质量的具体措施。     

对接焊铝塑复合管的发展及市场前景

介绍了搭接焊铝塑管和对接焊铝塑管的区别及对接铝塑管的性能优势。     

枝桠材粉碎机锤片创新设计

锤片是锤片式粉碎机的重要零部件,通过对锤片形状进行创新型设计,同时改变锤片在转子上的安装方式,有效的增加了物料颗粒与锤片的碰撞概率,增加了锤片与物料颗粒在碰撞过程中的破粹力,并且还能有效的破坏粉碎过程中产生的物料环流,通过这种改进最终提高了锤片式粉碎机的粉碎效率。     

木工硬质合金镶焊齿锯片的刃磨

介绍了木工硬质舍金镶焊齿圆锯片的刃磨技术,包括硬质合金镶焊锯齿刃磨砂轮参数和刃磨工艺参数的选用,以及硬质合金镶焊锯齿锯片外径、低碳钢齿背、后齿面、前齿面和槽齿的刃磨方法.     

机车变压器梁部件自动焊设备优化提升

基于现有机车变压器梁部件自动焊设备的现有配置和使用情况，结合变压器梁的结构特点，提出了自动焊设备优化提升方案。对T型梁自动焊工装进行优化改造，解决焊接变形大的问题；对自动焊设备进行双工位改造，新增一个箱型梁自动焊台位，实现了该设备多产品的焊接，设备使用率提高了100%以上。     

木工硬质合金镶焊齿锯片的选用

介绍了木工硬质合金镶焊齿圆锯片及硬质合金材料的选用,阐述了锯片外径、齿数、齿形、角度参数以及特殊锯片和适张度的选择。     

森铁钢轨的焊修和接长

森铁钢轨的焊修和接长王丽波，孟宪宏（黑龙江省松花江林管局）（黑龙江省森工总局）过去，多数森铁运输企业采用截头串轨的传统工艺来处理低轨头钢轨。这种做法既缩短了钢轨，又浪费工时。现在，主要采用手工电弧焊、气焊和喷焊等方法，在钢轨焊修方面取得了一定的效果。...     

电渣压力焊对接钢筋技术和质量控制

该文对电渣压力焊对接钢筋技术,施工步骤方法及质量控制的论述较为全面。同时对框架拉钢筋接头施工提供了方便,如被广泛采用,即能节省钢筋又是一种较好的焊接技术。     

多环式锤片破碎机在木纤维破碎上的应用

介绍了多环式锤片破碎机的工作原理及其在木纤维破碎上的应用     

农林仿形对靶喷雾及其控制技术研究进展

仿形对靶喷雾是实现农林精确施药的一种重要技术方式,近年来在理论发展和技术应用中取得重要进展。文中从仿形喷雾目标探测技术、常用仿形机构、仿形对靶控制及算法、仿形变量喷雾测试技术和典型农林仿形喷雾机方面评述现有仿形对靶喷雾技术,归纳包括红外线、超声波、图像和LIDAR等仿形喷雾目标探测方法与技术;分析常用仿形机构的仿形原理和各自设计的优缺点,强调轻量化是仿形机构设计的趋势;综述仿形对靶喷雾控制系统硬件和软件方面的发展,强调智能算法的应用能有效提高仿形喷雾控制系统的鲁棒性;分析评述仿形变量喷雾测试装置、喷雾系统数学模型和PWM变量喷雾技术的进展;介绍几种典型的农林仿形喷雾机,并提出农林仿形对靶喷雾的研究建议。     

Three-dimensional finite element modelling of heat transfer for linear friction welding of Scots pine

Finite element numerical analyses were performed to determine three-dimensional heat flux generated by friction to wood pieces during linear friction welding. The objective was to develop a computational model to explain the thermal behaviour of welded wood material rather than experimental methods, which are usually expensive and time consuming. This model serves as a prediction tool for welding parameters, leading to optimal thermo-mechanical performance of welded joints. The energy produced by the friction welding of small wood specimens of Scots pine (Pinus sylvestris L.) was determined by thermocouples and used as input data in the model. The model is based on anisotropic elasticity and the thermal properties were modelled as isotropic. This numerical simulation gave information on the distribution of the temperature in the welding interface during the entire welding process. A good agreement between the simulation and experimental results showed the appropriateness of the model for planning welded wood manufacture and prediction of thermal behaviour of wood during other mechanically induced vibration processes. The specimens presented in this model required a heat flux of 11 kW/m² to achieve a satisfactory welding joint.     

无人机喷雾技术防治刚竹毒蛾幼虫效果评价

为明确无人机喷雾与人工喷雾在防治效果和成本上的差异,揭示植保无人机喷雾施药技术的优点,在福建邵武发生刚竹毒蛾为害的毛竹林建立试验区,选用5种不同作用机制的生物农药,开展无人机喷雾和人工地面喷雾施药技术的防治对比试验。结果表明：无人机喷雾对刚竹毒蛾幼虫的防效显著好于人工喷雾,且在防治工效、人工费用和防治成本上均优于人工喷雾,表明植保无人机喷雾是一种便捷高效且节时、省力、降费的施药技术,可推广应用于林业有害生物的防治。     

浅析新型建筑给水管材的选用与施工

从现代新型给水管材的耐温耐压、线膨胀系数、导热性、抗水锤能力、价格、安装等多方面进行了比较分类，并将各种管材在建筑中的应用范围分成了三个部分，针对不同部分的管材应用及施工情况进行了归纳和总结。     

Chemical investigations on the thermal behaviour of wood during friction welding

Friction welding is a new technology in the course of which wood pieces are subjected to circular or linear movements in a welding machine. The wood in the contact zone is heated and melted. Aiming at a better understanding of the thermal alteration of wood and the formation of a viscous layer acting as adhesive, the thermally changed material was taken to be analysed by chemical and spectroscopic methods. As a manifestation of thermally splitting of wood, the total amount of extractable compounds within the joint material (JM) is higher than that of unaltered spruce. Cellulose was found less altered than the other essential wood components. Polyoses, on the other hand, are less stable under the conditions of friction welding; they are detectable only in small amounts in the altered zone. Lignin also suffers distinct changes as demonstrated by the increase of free phenolic groups and the decrease of the typical bonds between the phenolpropane units. Furan derivatives were detected within the volatiles of the smoke gas, arising mainly from the polyoses. It is obvious that reactions between furfural and other furan derivatives with lignin belong to the main reactions in the friction zone leading to cross-linking of the JM.     

静电喷雾的工作原理及分析

对静电喷雾技术原理进行了分析,阐述了静电喷雾的工作的原理,尤其是药液的雾化过程以及雾滴的充电及运动过程的工作原理,研究表明:由于静电喷头与农作物之间的静电场力作用,使雾滴具有了一定的方向性,从而向农作物各个部位运行,为静电喷头的研制提供参考。     

岩棉纤维喷涂复合保温墙体及其应用建议

本文详实介绍了岩棉纤维喷涂复合保温墙体的技术特点、施工技术,并分析了其稳定和耐久性及其优点。     

无人机雾化喷头对雾滴在竹林中沉降分布及害虫防效的影响

为明确不同喷头型号对无人机喷雾雾滴在竹林中沉积分布和防效的影响,揭示无人机喷雾的关键技术，研究选用不同型号雾化喷头，开展无人机喷雾雾滴检测和林间防治试验，分析不同喷头型号对雾滴的覆盖密度、沉降率、有效喷幅、密度变异系数和防治效果的影响。结果表明：无人机喷洒系统的雾化喷头对雾滴沉积分布的影响较大，在竹林喷雾中，无人机雾化喷头以SX110015VS型号为宜，其雾滴在竹林中的沉积分布状况最佳，雾滴穿透性最强，防治效果最理想。