D杯形砂轮修整碟形金刚石砂轮试验研究

本文采用了D杯形砂轮与碟形砂轮对磨法来修整大直径树脂结合剂碟形金刚石砂轮。在分析研究杯形砂轮修整碟形砂轮的修整原理及修整方式的基础上，用自行研制的专用修整装置，从主轴转速、修整深度、修整工具结合剂类型等方面进行了对比工艺试验研究，总结了杯形砂轮修整碟形砂轮的不同工艺参数与修整效率、修整质量之间的工艺规律。试验结果表明，在本试验条件下主轴转速500r／min，修整深度0．02mm的修整效率较好；细粒度、中等浓度的青铜结合剂杯形金刚石砂轮与粗粒度、高浓度的杯形砂轮修整碟形砂轮相比，后者具有较好的修形效果和修整效率；D杯形砂轮与GC杯形砂轮交替配合使用可以大大提高碟形金刚石砂轮的修形效率和修锐效果。     

陶瓷结合剂金刚石砂轮的修整研究(Ⅱ)——杯形砂轮修整器的修整性能

本文详细讨论了杯形砂轮修整器修整陶瓷结合剂金刚石砂轮时的性能。主要结果如下:(1)修整器以横向进给方式修整时,金刚石砂轮断面形状为一斜线。使用其它修整器时,只要以横向进给方式进行修整,所得断面形状亦为一斜线。(2)修整器以切入送进方式修整时,只要把修整器旋转轴线调整到垂直于工作台面,则金刚石砂轮断面形状为一水平直线。若把旋转轴线调整到同工作台面成非90°夹角,则断面形状为一圆弧线或者斜线。(3)以切入送进方式修整时,金刚石砂轮速度越低或工作台速度越高,修整比越高。杯形砂轮旋转速度对修整比没有明显影响。(4)金刚石砂轮速度过快容易使砂轮表面磨粒钝化。     

一种使用杯形砂轮的金刚石锯片修整开刃机

一现有技术及其存在问题金刚石锯片修整开刃,是生产中必不可少的工序,可以达到：     

金刚石砂轮的修整试验研究

本文着重分析了多颗粒金钢石笔法和碳化硅砂轮磨削法对金刚石砂轮进行整形及用碳化硅条件进行修锐的效果。通过试验，确定了有关砂轮修整参数的选择。对修整机理进行了进一步的探讨。     

旋转金刚石修整工具修整超硬磨料砂轮的研究

本文对比研究了金刚石修整笔和旋转金刚石修整工具,在修整超硬磨料砂轮时修整力、工具磨损、修整效率等参数的变化规律,结果表明:超硬磨料砂轮的修整中,旋转金刚石修整工具修整力、修磨效率和磨损等几乎不随修整次数增加发生变化,其原因是修整工作是由整个圆周上金刚石分担,旋转型金刚石修整工具在修整过程中,具有挤压砂轮的作用,使被修整的金刚石砂轮表面具有较好锋利度.结果表明:在优化的修整工艺条件下,旋转金刚石工具可以实现对超硬磨料砂轮的精密修整.     

砂轮修整工具用人造金刚石

在砂轮的修整过程中,采用人造金刚石修整工具往往是天然金刚石修整工具的最好替代方法,其理由是采用人造金刚石修整工具可以保证砂轮的修整工艺获得稳定一致的修整质量。     

单层钎焊金刚石砂轮的机械化学修整

单层钎焊金刚石砂轮的应用因其磨粒等高性不一致而在硬脆材料的精密加工中受到一定限制。本文采用机械化学复合法对80/100单层钎焊金刚石砂轮进行了修整试验研究。在修整实验前后,测量了砂轮工作面圆跳动,跟踪了磨粒的形貌变化,进行了砂轮磨削K9玻璃实验,观察并分析了工件磨削后的粗糙度值的变化。研究结果表明：机械化学复合法对单层钎焊金刚石砂轮的修整是有效的,磨粒的磨损以化学腐蚀为主,砂轮修整后磨粒等高性较好,磨削K9玻璃工件表面粗糙度明显降低。     

钎焊金刚石砂轮修整实验研究

单层钎焊金刚石砂轮的圆度轮廓精度由于受磨料粒径和钎焊结合剂层高度不均匀等因素的影响而使其难以在工程陶瓷等硬脆材料精密磨削中应用.然而单层钎焊金刚石砂轮的修整是直接对金刚石磨粒进行微量的磨损,修整难度大、效率低,因此,探讨快捷且精密的整形方法就成了解决其应用问题的关键技术之一.在本文研究中,分别采用铁基金刚石烧结磨块、钎焊细粒度金刚石板和氧化铝磨块三种整形工具对钎焊金刚石砂轮进行了磨削法整形实验研究,实验结果表明利用氧化铝磨块进行磨削修整效率极低;钎焊金刚石板磨削修整虽然效率高,但是对砂轮表面金刚石磨粒造成大量破碎磨损;铁基金刚石烧结磨块在整形过程中可稳定地以磨平方式磨损砂轮表面金刚石磨粒,经精密整形后的砂轮圆度轮廓精度较高,用其磨削工程陶瓷时工件表面的犁沟和裂纹明显减少.     

Computer simulation of sub-micron-scale precision truing of a metal-bonded diamond grinding wheel

A new simulation mode of wheel profile generation was proposed in precision truing of a metal-bonded diamond grinding wheel by considering the mutual wear of grinding wheel and truer in sub-micron scale. The aim is to understand how truing parameters influence truing accuracy and truing efficiency, namely wheel profile flatness and truing number. In order to assure the sub-micron-scale accuracy of a trued wheel profile, dry electro-contact discharge was employed in arc envelope truing. First, an arc-shaped truing profile replicated on wheel profile was defined and analyzed theoretically and then identified by truing experiment; second, the micro-truing ratio describing the mutual wear of a grinding wheel and truer related to the depth of cut was investigated by micro-truing experiment; then the simulation mode of the truing grinding wheel was established by using dispersed profile coordinates of the grinding wheel and truer with reference to the micro-truing ratio; finally, simulation analysis was conducted to trace on-line formation of the trued wheel profile in truing process. It is confirmed that this simulation method is valid and applicable to visualize the sub-micron-scale truing process. It is also found that by decreasing the depth of cut or plunge truing number wheel profile flatness decreases but truing number increases. It is concluded that there exist minimum wheel profile flatness and minimum truing number in a truing process, which can be used to optimize truing parameters for efficient precision truing.     

碟轮修整单层钎焊金刚石砂轮的试验研究

单层钎焊金刚石砂轮在制作完成之初由于砂轮基体加工存在误差以及磨粒粒径大小不一等原因造成磨粒等高性不一致,这使其难以在硬脆材料的精密磨削中得到广泛的应用。采用自制的钎焊碟轮对80/100#单层钎焊金刚石砂轮进行了修整试验研究。在修整试验前后跟踪了砂轮磨粒等高性的变化,进行了SiC陶瓷的磨削试验,并观测了工件表面质量的变化情况。试验结果表明:采用此方法能够实现单层钎焊金刚石砂轮的高效精密修整。修整试验结束后砂轮磨粒等高性较好,磨削SiC陶瓷的表面质量得到明显改善,表面粗糙度Ra值达到了0.1μm以下。     

非球面模芯镜面磨削专用杯形砂轮修整技术的研究

针对轴承钢非球面模芯镜面磨削用铸铁结合剂CBN杯形砂轮的修整问题,设计了专用摆动电极和圆弧成形电极修整装置,该装置结构简单,微调精度高;利用电极与CBN砂轮铸铁结合剂之间的电火花放电腐蚀现象,在亚微米机床上,利用高频直流脉冲电源作对砂轮进行电火花整形,整形后的砂轮通过调整放电电压与放电间隙,在电解液作用下进行短时间修锐。通过最终检测结果表明,砂轮的尺寸误差为3．5μm,最大面形轮廓误差约为3μm,修整后砂轮的尺寸误差和形状误差均达到非球面模芯镜面磨削加工要求。     

陶瓷零件精密成形磨削新工艺研究

本研究开发采用金刚石磨料砂轮精密成形磨削陶瓷材料新工艺,实现采用金刚石磨料砂轮精密(微米级)成形磨削复杂形状陶瓷零件.文章介绍了磨削工艺中采用的提高成形磨削砂轮工作形面精度保持性、金刚石磨料砂轮的高效精密成形修整、砂轮修锐等关键技术.采用的砂轮是1A1 305×20×127×10 MBD 150 B 100,其特别之处是采用了新型树脂结合剂,具有良好的高温强度性能,磨削速度为40 m/s,新的砂轮修正方法将金刚石砂轮修整过程分为修形、修磨和修锐几个阶段.采用切入式成形磨削,磨削余量约1 mm,磨削得到的陶瓷零件形面圆弧精度可达到:0.005 mm,齿距误差:0.0025 mm;此外还进行了磨削陶瓷轴承环试验,磨削后获得的陶瓷零件圆弧精度达0.005 mm,沟道形位精度:0.003 mm,尺寸分散度在微米级.采用本方法可以成形磨削几乎任意形面的陶瓷或其他适合金刚石磨料砂轮加工的材料零件.     

An experimental investigation of dry-electrical discharge assisted truing and dressing of metal bonded diamond wheel

Metal-bonded diamond wheels have superior qualities such as high bond strength, long wheel life, wear-resistant ability and high grinding efficiency. But it is very difficult to true and dress diamond wheel because of its highest hardness. Traditional mechanical truing does not guarantee truing accuracy of diamond wheel because of single diamond dresser wears out very quickly. To reduce wear of diamond dresser and hence guarantee a desired wheel surface, a novel truing and dressing method, namely, dry electrical discharge (dry-ECD) assisted truing and dressing, is proposed and tested to achieve good dressing quality and efficiency. Because the diamond wheel is mounted on the MK9025 optical profile grinder, dielectric liquid is forbidden. The new dry-ECD dressing/truing method basically eliminates the use of dielectric liquid. Therefore, it is free from the serious problem of electrolytic corrosion caused by electrolytic current flowing through water encountered in conventional ECD. The FE analysis of temperature distribution in dry-ECD assisted truing and dressing diamond wheel using ANSYS is performed in this study. Temperature field simulation helps to select optimized parameters under certain conditions. Energy dispersive X-ray (EDAX) analysis was used to measure the composition of diamond wheel before and after dry-ECD assisted truing and dressing. Further, hard alloy grinding experimental results proves that a little variation in material composition of diamond wheel after dry-ECD assisted truing and dressing does not influence grinding result. A series of experiments of dry-ECD assisted truing and dressing of metal bonded diamond wheel are conducted to investigate truing efficiency, truing accuracy, dresser wear, dressed wheel profiles and three-dimensional truing/dressing forces in comparison with those of the conventional single diamond methods. Experimental results show that the new dry-ECD assisted truing and dressing technique offers a number of advantages over the conventional single-tip diamond dressing and truing method. Furthermore, mechanism of the dry-ECD assisted truing and dressing is investigated through the careful analysis of the properties of chips.     

金刚石砂轮修整新技术的研究

通过一系列试验，研究了适用于MK9025数控光学曲线磨床上金刚石砂轮修整的3种新技术：激光修整法、气中电火花放电修整法、激光辅助机械修整法，实验结果表明3种金刚石砂轮修整技术都是可行的，是很有前途的新技术。     

钎焊金刚石砂轮磨削石材中金刚石粒度对磨削力的影响研究

本文通过测量不同金刚石粒度的高频感应钎焊金刚石砂轮磨削花岗石过程中的磨削力，对砂轮所受的法向力和切向力进行了研究。对不同粒度条件下磨削深度、进给速度和砂轮线速度对磨削力的影响进行了分析。研究发现磨削力随砂轮线速度的增大而减小，随磨削深度和进给速度的增大而增大，磨削深度对磨削力的影响程度比进给速度大。小粒度金刚石磨削时，磨削三要素对磨削力的影响比大粒度金刚石磨削时大。     

钎焊金刚石砂轮磨削硬质合金温度的试验研究

根据半人工热电偶测温原理制备了磨削测温试样,利用感应钎焊金刚石砂轮和电镀金刚石砂轮进行硬质合金YG6的磨削试验,研究了磨削深度、工件进给速度对工件表面磨削温度的影响。试验结果表明:在相同的磨削参数下感应钎焊金刚石砂轮的磨削温度要远低于电镀金刚石砂轮,且随着磨削深度和工件进给速度的增大磨削温度上升较为平缓,钎焊金刚石砂轮磨粒出露高度高、容屑空间大,磨粒呈有序排布是磨削温度较低的主要原因。