工程机械零件的五种清洗方法

工程机械零件油污主要是由不可皂化油与灰尘、杂质等形成的。不可皂化油不能与强碱起作用，如各种矿物油、润滑油，均不能溶于水，但可溶于有机溶剂。去除此类油污有化学和电化学两种方法；常用的清洗液为有机溶剂、碱性溶液和化学清洗液等；清洗方式有人工清洗和机械清洗两种。

工程机械零件的断裂失效分析

无论是轴、齿轮或连接件断裂,首先应对断口进行宏观分析,即用肉眼或放大倍数不到30倍的普通放大镜,对断口表面直接观察,以确定断裂的宏观表现及性质。变矩器的泵轮或涡轮往往有许多叶片被打坏。这些叶片的损坏有先有后,导致变矩器失效的是最先损坏的叶片。最早损坏的零件,就是断裂失效分析的依据。

浅谈工程机械中零件的基本维修技巧

在市场经济的影响之下，铁路施工的现代化进程发展水平得到了相应的提高，铁路施工的工程项目投入了越来越多的设旋设备，而工程机械作为建筑工程、道路工程以及铁路旋工工程的主要装备之一，对工程的开展具有重要的意义。因此，工作人员应该及时掌握工程机械零件的基本维修技巧，进一步强化工程机械在施工项目中的应用效果。本文主要结合铁路施工的工程机械，通过几种基本机械的零件维修技巧展开相应的分析。

小松挖掘机零件真伪的辨别方法

小松公司工程机械零件可分为一般零件、标准零件和外购零件3种。一般零件是指由小松自己设计的零件。标准零件（KES）可在多种型号机器上通用，包括各种螺栓、螺母、键销、轴承、液压元件和电气元件等。外购件是指从其他公司采购的零件。

预变形对碳钢渗硼组织的影响

低碳钢（０． ２０％ Ｃ）渗硼后获得由 ＦｅＢ层和 Ｆｅ２Ｂ层组成的硼化物层；高碳钢（１．０％ Ｃ）渗硼后则获得几乎由单－ Ｆｅ２Ｂ层组成的硼化物层．而中碳钢（０． ４５％ Ｃ）的硼化物层则由若干个 ＦｅＢ层和Ｆｅ２Ｂ层组成的亚层所构成．预变形可使低、中碳钢的硼化物层减薄，尤其当预变形量较小（２０％）或较大（６０％）时；而对于高碳钢，预变形则使其增厚，特别在中等变形量（４０％）时．

Valuable Impulses and Successful Models of Gearbox Development from Practice

Gears play an important role in mechanical engineering because of their moment and speed transmission possibilities. Design and optimization of a complete gearbox provide many requirements to the designer. The complex gearbox model consists of many machine elements （shafts, gears, bearings, housing, seals, and shaft-hub connections）. The gearbox must be understood as a system with interactive parts. Next to the calculation of kinematics, load capacities and life times of single elements, aspects of load distribution and efficiency and noise excitation of gearboxes become important. The wide range of knowhow needed mostly cannot be covered by a small number of engineers. The development of automated calculation routines with understandable and comprehensive results is the goal for these research projects that lead to sottware-realizing solutions for engineers to efficiently design, calculate, optimize and verify gearboxes with minimal resources in terms of calculation experts and time.

Study on Programming of CNC Turning and Processing Techniques

Due to its high efficiency, high precision and high flexibility, CNC lathe is widely used in the machinery manufacturing industry increasingly, and becomes one of CNC machine too[s that most widely used. However, to give full play to the role of CNC lathes, the key is programme, that is, preparing the reasonable and efficient processing procedures depending on the features and precision parts. This paper discussed the problems of programming and processing techniques of the CNC lathe parts.