难加工材料的加工技术

针对难加工材料的特点,总结了难加工材料的切削加工性改善的方法及其非常规加工方法和特种加工方法的概况及进展。

颗粒增强金属基复合材料的加工现状

颗粒增强金属基复合材料(PRMMCs)具有优良的综合物理机械性能,属于难加工材料之一,也是国内外切削领域研究的重点.目前该类材料的加工方法主要采用普通切削加工和非常规机械加工两大类.本文主要介绍PRMMCs加工技术的进展,不同加工方法的适应性及其亟待研究解决的问题,以期对该领域的课题研究与成果应用提供参考.

耐热钢切削时切削刀具的优化

介绍了耐热钢切削加工特点及目前用于切削耐热钢的刀具材料、刀具几何参数的选择。

Review on non-conventional machining of shape memory alloys

Shape memory alloys （SMAs） are the developing advanced materials due to their versatile specific properties such as pseudoelasticity, shape memory effect （SME）, biocompatibility, high specific strength, high corrosion resistance, high wear resistance and high anti-fatigue property. Therefore, the SMAs are used in many applications such as aerospace, medical and automobile. However, the conventional machining of SMAs causes serious tool wear, time consuming and less dimensional deformity due to severe strain hardening and pseudoelasticity. These materials can be machined using non-conventional methods such as laser machining, water jet machining （WJM） and electrochemical machining （ECM）, but these processes are limited to complexity and mechanical properties of the component. Electrical discharge machining （EDM） and wire EDM （WEDM） show high capability to machine SMAs of complex shapes with precise dimensions. The aim of this work is to present the consolidated references on the machining of SMAs using EDM and WEDM and subsequently identify the research gaps. In support to these research gaps, this work has also evolved the future research directions.

高校图书馆采编工作流程的比较研究——以广东石油化工学院图书馆为例

传统采编加工流程与非常规采编加工流程在流程、出错概率、操作空间、人力、灵活性、运作成本等方面都有所不同。通过比较可知,非常规采编加工流程具有流程简化、省工、省力、出错概率少、节省空间、操作灵活、降低运作成本、加快新书上架速度等优点,该方法已被图书馆界与外包公司所采纳与利用。