奥－贝球墨铸铁切削加工性的研究

分析研究了切削用量三要素对奥－贝球铁主切削力Ｆ２和刀具寿命的影响规律；从降低切削力的观点出发，优选了刀具材料。本文得出的结论及实验数据对奥－贝球铁的切削加工有指导意义，可作为有关部门切削加工的参考。     

PCD刀具切削岩石的合理切削速度

本文通过ＰＣＤ刀具切削加工岩石的试验，考察了切削速度对切削温度、刀具寿命和切削力的影响，总结出岩石切削中的合理切削速度范围；另外，通过对岩石曲形表面加工采用磨削－抛光和切削－抛光两种工艺加工效率的比较，证明以切削代替磨削加工岩石具有重要的实际意义。     

聚晶金刚石刀具振动切削不锈钢技术研究

使用聚晶金刚石刀具进行了超声波振动切削不锈钢的实验研究,研究了切削方式对切削力及已加工表面粗糙度的影响规律。通过对刀具磨损区微观形貌的观测,分析了PCD刀具切削不锈钢时的磨损机理。结果表明,化学磨损在金刚石刀具切削黑色金属时占主导地位。超声振动切削可明显减小切削变形、切削力及刀具磨损。     

奥—贝球墨铸铁焊补材料的开发与研究

介绍奥－贝球铁焊接冶金、主材料在国内外的研究进展，分别讨论等温处理条件下获得奥－贝球铁焊缝、焊态下获得奥－贝球铁焊缝及热影响区在加热过程中的冶金、相变及工艺对焊接接头组织与机械性能的影响，提出了当前进一步研究奥－贝球铁焊补的新问题。     

低压水射流辅助聚晶金刚石刀具车削硬质石材

提出了低压水射流辅助聚晶金刚石刀具切削硬质石材的加工方法。分析了低压水射流参数、加工工艺参数和刀具的弹性对切削过程、切削力和加工表面质量的影响，研究了水射流辅助聚晁金刚石刀具切削硬质石材的加工机理和加工工艺。     

智能轴承在钻削加工中的应用

在组合机床及自动化生产中,由于切削加工的自动化,要求对切削状态与刀具状态进行在线检测。介绍用于切削加工的刀具状态监控系统－智能轴承监控系统,该系统在大量实验的基础上,根据切削力与磨损之间的关系,制定了刀具状态监控策略,采用多级报警的方式,实现了民具不同状态的在线检测。     

刀具材料及角度对7075-T6铝合金切削力的影响仿真

为了提高7075-T6铝合金的切削效率,采用单因素试验法基于ABAQUS软件分析不同刀具材料及刀具几何参数对切削力的影响。试验结果表明：使用YG8刀具切削加工7075-T6铝合金时受到的切削力最小;随着刀具前角的不断增大,切削力显著降低;随着刀具后角的不断增大,水平切削力的下降相对较缓,但垂直切削力显著降低。     

自回转刀具的设计及切削性能

介绍了硬质合金自回转刀具工作原理及结构特点．并通过与可转位刀具的对比切削试验．证明其切削力小．刀具磨损轻微；在切削难加工材料时，宜在高速和较大进给量条件下工作．是切削难加工材料比较理想的刀具．     

镍基粉末冶金零件的切削试验研究

对陶瓷刀具和硬质合金刀具进行了镍基粉末冶金零件的干切削对比试验,测量了切削力和加工表面粗糙度,分析了刀具的磨损机理。试验结果表明:陶瓷刀具的切削性能明显优于硬质合金,适合于粉末冶金零件的切削加工。     

自回转刀具发展概况综述

在机械加工领域中,回转刀具由于其刀片受到自身的摩擦或者外加动力驱动而回转,产生连续的切削力,从而提高了刀具的加工性能,引起了学者的研究兴趣。文中对自回转刀具的切削力和切削功率、切削温度、刀具磨损及耐用度、加工表面粗糙度等几个方面的研究现状加以综述,在此基础上探讨了今后自回转刀具的研究发展方向。     

奥-贝球墨铸铁加工表面质量的试验研究

用试验的方法研究了奥－贝球墨铸铁的加工表面形态、已加工表面粗糙度，分析了切削用量和刀具几何角度对加工表面粗糙度的影响．结果表明，已加工表面质量与刀具切削刃不平整及材料组织有关。为提高加工表面质置，必须优选切削参数，重视刀具磨损、后刀面粗糙度及工件材料组织的缺陷。     

陶瓷刀具高速干切削等温淬火球铁(ADI)磨损性能研究

采用陶瓷刀具(CC650)对等温淬火球墨铸铁(以下简称AD I)进行干式高速切削试验,用带有X射线能谱分析的扫描电镜观察刀具表面的磨损形貌,并对刀具磨损微区和工件表面成分进行定性分析,用X射线衍射仪对刀具、工件和切屑等试样进行物相分析,研究高速切削时陶瓷刀具磨损性能及磨损机制。结果表明:切削速度是影响刀具寿命的主要因素;CC650刀具高速干切削AD I时形成的刀具主后刀面和前刀面的磨损形态基本类似中、低速条件下磨损形态,主要区别在其磨损区域紧靠切削刃,最大磨损部位位于切削刃附近;CC650刀具高速切削AD I时切削温度高,其磨损是机械磨损与化学磨损综合作用的结果,磨损机制主要包括磨料磨损、扩散磨损、粘结磨损和微崩。     

Specific cutting force, tool wear and chip morphology characteristics during dry drilling of austempered ductile iron (ADI)

Dry machining is being recognized as ecological machining due to its less environmental impact and manufacturing cost. However, the choice of dry machining is mainly influenced by the workpiece material properties, machining operation and cutting conditions. The recent emergence of austempered ductile iron (ADI) can be considered a significant economic advantage to the increasing industrial demand for cost- and weight-efficient materials. However, due to its microstructure-induced inherent properties, ADI is considered hard-to-machine material. Thus, the dry drilling of ADI is investigated in this paper. The ADI material used in the present study is produced using an innovative process route for near net shape casting production. Drilling experiments are conducted on a DMU80P Deckel Maho five-axis machining centre using PVD-coated carbide tools under dry cutting environment. The dry drilling of ADI under different cutting conditions is evaluated in terms of specific cutting force and tool wear analysis. The influence of cutting conditions on chip morphology and surface roughness is also investigated. The experimental results revealed that the combination of the low feed rate and higher cutting speed leads to the higher mechanical and thermal loads on the tool's cutting edge, resulting in higher specific cutting force values. This behaviour is further supported by the chip morphology analysis, which revealed the formation of segmented chips at higher cutting speed with segment spacing increase with an increase in feed rate. Depending upon the cutting parameters, different modes of tool failures including crater wear, flank wear, chipping, breakage and built-up edge were observed. Surface roughness analysis revealed the influence of tool wear and chip morphology on the machined surface finish.     

刃口钝化对PCBN刀具切削性能影响的研究

通过PCBN刀具断续切削等温淬火球墨铸铁(ADI)的试验,分析了刃口钝圆半径对PCBN刀具切削力和刀具寿命的影响.试验结果表明:准静态力与断续冲击力随钝圆半径的增大呈先增大后减小的趋势;断续冲击力与准静态力的差值称之为冲击力,它真实地反映了断续切削时刀具所受冲击大小,径向冲击力随钝圆半径的增大呈先减小后增大的趋势;刀具...     

基于CAD/CAM技术切削刀具加工辅助工艺系统开发

分析了切削刀具加工工艺流程,确定了切削刀具加工辅助工艺设计软件的特征与功能。根据工艺设计软件的特征与功能,进行了加工工艺卡的编制与操作。建立了各类材料库、机床库、刀具库、切削用量库、设计和制造特征数据库等,解决了产品技术准备阶段的信息集成与共享问题,实现了工艺卡自动生成。     

模具制造中引入高速切削技术的实例研究

数控高速切削技术应用于模具加工时,要合理规划各个面的加工顺序和粗精加工工艺,正确设置刀具切入工件的方式和刀具路径,保证切削过程各因素平稳,变化光滑连续,使切削过程安全高效进行。     

A study of deformation of the machined workpiece and tool under different low cutting velocities with an elastic cutting tool

To understand the effects of cutting velocity, tool elastic deformation generated by high normal stresses during metal cutting processing and artificial tool flank wear on the cutting process, an iterative mathematical model for calculating the tool–workpiece contact problem was developed in this paper under the assumption of elastic cutting tools. In this model, the finite element method is used to simulate cutting of mild steel by the P20 cutting tool with constant artifical tool flank wear under the condition of three different cutting velocities. The results obtained in the simulation were found to match the experimental data reported by related studies. The simulation results also indicate that the thrust and the cutting forces are functions of cutting velocity. Besides, both the normal stress on the tool rake face and the residual stress of machined workpiece generally decrease with increase in cutting velocity. According to the findings in this study, though the residual stress of the machined workpiece decreases as the cutting velocity increases, its value is still higher than that in ordinary conditions due both to the influence of tool flank wear and tool elastic deformation. Also, the phenomenon of curvature at the workpiece end easily occurs.     

高速切削中的刀具材料

结合高速切削加工技术和刀具材料的研究,综合论述高速切削加工刀具材料的性能特点、研究进展和应用,展望高速切削加工刀具材料的未来。     

高速切削刀具材料的性能及应用

刀具材料是实现高速切削加工的关键,其性能直接影响刀具能否实现高速切削及刀具耐用度。主要论述了新型高速钢、硬质合金、陶瓷、聚晶金刚石、聚晶立方氮化硼(PCBN)、涂层刀具等高速切削刀具材料的性能,以及高速切削不同材料时刀具材料的合理选用原则,以适应当前世界在机械制造中的高效加工和低成本的竞争。