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分析了硬质合金钻头在加工40Cr时的切削加工过程,从中比较了不同涂层材料的硬质合金钻头对被加工材料的切削性能及寿命。总结了加工40Cr时最为优化的涂层材料,从而提高刀具寿命和被加工件的表面光洁度,改善断屑和排屑。 相似文献
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高温合金振动钻削断屑实验研究及机理分析 总被引:1,自引:0,他引:1
对振动钻削理论进行了分析,建立了振动钻削时断屑的数学模型,利用自制的振动钻削实验装置,采用不同的振动钻削参数进行高温合金振动钻削试验,对轴向振动钻削的断屑效果以及轴向钻削力和扭矩进行了研究,分析了各加工参数对加工过程的影响,发现振动钻削力随钻削参数的变化比较平稳,在大进给量或高转速状态下,振动钻削的钻削力比普通钻削力小得多。通过比较振动钻削与普通钻削所得切屑可知:振动钻削有利于断屑,切屑体积小,排屑顺畅。 相似文献
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《工具技术》2015,(8):36-40
在不同切削材料、不同切削参数条件下,为提高扩孔钻的切削性能,其结构需要随之改变。提出由三段相互相切的圆弧构成扩孔钻容屑槽型。根据扩孔钻的切削特点和排屑要求,三段圆弧分别由切削圆弧、卷屑圆弧及容屑圆弧构成;切削圆弧构成的切削刃前角可根据被加工材料与切削参数的不同任意选取,刃瓣宽度根据扩孔钻的外径和强度取值,扩孔钻的芯径依据容屑槽需要的空间大小及扭转强度的要求确定。此结构根据加工材料特性选取所需要的前角、芯径、刃宽等参数,不会改变切削圆弧、卷屑圆弧和容屑圆弧两两相切的槽型设计。与直线切削刃相比,圆弧切削刃轴向力和扭矩低,所提出的结构既可以保证扩孔钻切削刃强度,又有足够的容屑空间,切屑容易卷曲并折断,避免了切屑碰伤已加工表面,且排屑流畅。对改进的扩孔钻结构,应用计算机仿真容易设计出扩孔钻槽铣刀刃形,以方便扩孔钻的设计、检验、制造。 相似文献
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本文通过建立深孔振动钻削的数学模型,在振动钻削相邻两转间的断屑条件的基础上推导出更为一般的断屑条件式,为振动钻削断屑过程的参数匹配提供了理论依据,并得到了振动钻削加工试验的证明。 相似文献
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钛合金的切削加工性能差,其深孔钻削的技术难度更大。枪钻是深孔钻削的高效刀具,能有效解决钛合金的深孔加工问题。本文基于对钛合金材料切削性能和深孔钻削工艺的分析,通过深孔钻削试验,改进了钛合金叶片深孔钻削工艺,提高了枪钻寿命。 相似文献
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在研究了钛合金材料切削性能的基础上,针对钛合金的难加工性,选用了焊接式硬质合金刀具,并优化选择了不同的切削用量进行钻削试验。通过处理试验数据,确定了加工钛合金TC4的切削用量规律。 相似文献
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通过对SGl3Cr4M04Ni4V钢真空渗碳过程的主要影响因素进行试验分析,初步摸索了各工艺参数之间的关系,为提高该钢种真空渗碳热处理质量提供了试验数据。 相似文献
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变进给量振动钻削微孔的研究 总被引:4,自引:0,他引:4
提出了变进给量振动钻削新方法,并分析了其降低微孔钻削入钻位置误差的机理,采用直径为0.28mm的高速钢麻花钻对18Cr2Ni4WA低碳合金结构钢做了对比钻削实验,结果显著降低了微孔的入钻位置误差,验证了这种新方法优良的工艺效果。 相似文献
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XU Xusong CAO Yanlong YANG Jiangxin Institute of Contemporary Manufacturing Engineering Zhejiang University Hangzhou China 《机械工程学报(英文版)》2006,19(1):140-142
A condition monitoring method of deep-hole drilling based on multi-sensor information fusion is discussed. The signal of vibration and cutting force are collected when the condition of deep-hole drilling on stainless steel OCr17Ni4Cu4Nb is normal or abnormal. Four eigenvectors are extracted on time-domain and frequency-domain analysis of the signals. Then the four eigenvectors are combined and sent to neural networks to dispose. The fusion results indicate that multi-sensor information fusion is superior to single-sensor information, and that cutting force signal can reflect the condition of cutting tool better than vibration signal. 相似文献
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Muhammad Pervej Jahan Yoke San Wong Mustafizur Rahman 《The International Journal of Advanced Manufacturing Technology》2010,46(9-12):1145-1160
Microelectro-discharge machining (micro-EDM) has become a widely accepted non-traditional material removal process for machining difficult-to-cut but conductive materials effectively and economically. The present study aims to investigate the feasibility of machining deep microholes in two difficult-to-cut materials: cemented carbide (WC-Co) and austenitic stainless steel (SUS 304) using the micro-EDM drilling. The effect of discharge energy and electro-thermal material properties on the performance of the two work materials during the micro-EDM drilling has also been investigated. The micro-EDM drilling performance of two materials has been assessed based on the quality and accuracy of the produced microholes, machining stability, material removal rate (MRR), and electrode wear ratio. The results show that deep-hole micro-EDM drilling is technically more feasible in WC-Co as it offers microholes with smooth and burr-free surfaces at the rim in addition to improved circularity and lower overcut than those provided by SUS 304. Moreover, WC-Co exhibits better machinability during the deep-hole micro-EDM drilling, providing relatively higher MRR and stable machining. 相似文献
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主要分析了强力珩磨技术的工艺特点及技术关键,通过强力珩磨技术在钛合金和沉淀不锈钢精密深孔加工中的应用,指出强力珩磨技术是解决难加工材料精密深孔加工的主要途径之一,是难加工材料深孔的精密、高效加工技术。 相似文献