Production Process Analysis and Design for Transferred Project of Company A

集团型公司在不同制造工厂之间通常会因成本变化、技术更新、市场定位、新兴竞争者等因素的影响而进行一些项目转移，以形成更强的市场竞争优势。论文以A集团公司从其在美国的一家生产工厂战略转移一个项目到厦门工厂进行生产制造为例，研究如何在当前的市场运作环境和技术条件下，以精益六西格玛的管理理念来进行项目转移过程中的工厂生产流程分析与设计。论文采用实证研究的方法，按“提出问题”、“分析问题”和“解决问题”的结构进行分析、研究。首先，介绍了精益六西格玛的基本理论、方法及常用的改善相关工具；其次，介绍了A集团公司的行业背景和厦门工厂的基本情况，通过基于价值的流程分析，来研究项目转移所面临的工厂布局和生产产能的...Group companies usually take many factors into consideration to divert some projects between different manufacturing plants, for example, the cost, technological updating and renovation, market positioning, new competitors, to have better competitive advantage in the market. In this thesis, Group A transfers a product in strategy from a production plant in the US to Xiamen factory, to use Lean Six...学位：工商管理硕士院系专业：管理学院_工商管理硕士(工商管理硕士)学号：1792011115101

The YAG laser texturing technology and application with controllable disorder distribution

The special morphology of spots isolated from each other could lead the laser texturing (LT) sheet to better stamping and coating properties, compared with shot Blast texturing (SBT) sheet and Electro-discharge Texturing (EDT) sheet. While the spots with regular distribution caused the laser texturing sheet appearing fringes easily. There were three methods to achieve YAG laser texturing disorder distribution spots, including controlling disorder delay, controlling disorder deflection, and controlling disorder image carving, which could reach the disorder spots texturing effect of EDT, and resolve the fringes problem of laser texturing. JM-3000 YAG laser texturing equipment was composed by mechanical system, laser system, controlling system, the outside optical system, frequency convertion cooling system and protection gas system, which achieved the disorder spots distribution of YAG laser texturing

Laser Operating Parameters and Their Influence on the High Speed Welding of Cr-plated Sheet Steel

The welding of Cr-plated sheet steel at laser welding speeds in excess of 30 m/min results defects. In this work a fibre laser was used to weld Cr-plated sheet steel and the effects of the laser parameters (laser power, minimum input energy of laser input and power density) for high welding speeds (>30 m/min) was researched. The welding speed was increased linearly with the required laser power and the turning point appeared when the focus position from the focal 0 to 5 mm. The welding speed was decreased linearly with the required the minimum input energy of laser input accordingly, the turning point appeared at the same position. The relationship between welding speed and laser power density was two linear segments and the turning point was 40 m/min, 6.50 x 10(5) W/cm(2)

Friction and Wear Properties of Cylinder Liner and Piston Ring with Different YAG Laser Honing Micro-Pits Distributions

通过改变激光刻蚀微坑面积占有率S p及微坑分布角度θ等参数,测得摩擦副运行过程中缸套-活塞环间摩擦系数及缸套下试块磨损量,研究激光刻蚀工艺对缸套-活塞环摩擦副摩擦磨损性能的影响.得出在其他参数不变,θ为30°时,摩擦副间温度及摩擦系数最低,θ为45°时,磨损量最小;深径比为0.1、θ为30°时,S p为35%,摩擦磨损特性最佳.将激光刻蚀缸套与机械珩磨摩擦磨损特性进行比较,激光微坑刻蚀得到了更低的摩擦系数和更小的磨损量

缸套-活塞环摩擦副的磨损润滑研究现状与发展前景

分析了气缸套-活塞环的磨损润滑机理,并比较了材料表面处理的多种方法,如机械处理、激光珩磨等的优缺点,得出气缸套表面分部处理的思路,并提出了摩擦副减摩润滑的基本研究思路

Investigation on the voltage-current characteristics of the YAG laser guiding discharge channel

研究了在空气、油膜和绝缘树脂薄膜这三种放电介质中的伏安特性,得出了在同一介质中,通道电极间电压不随其它初始条件改变而变化,只与放电介质对通道箍缩能力成正比,在本实验中薄膜的通道电压最高80.4V,空气中最低26.0V。通道中电流波形与放电介质有关,同样的高低压组合、相同放电脉宽下在空气和油膜中为矩形波,而在薄膜中为三角波,峰值电流变化不大。电流波形不随脉宽的改变而变化,当增大初始高压端或低压端输入时,电流随之增加,并且低压端输入对提高峰值电流更有效果