多工位圆珠笔头自动加工机床推出

浙江省平阳县敖江镇工兴路季绍龙推出了多工位圆珠笔头自动加工机床。它主要用于圆珠笔头的加工 ,也可用于加工其它微型带深孔轴类零件 ,如气门芯、打火机气咀等。操作时 ,毛坯加入料斗后 ,能自动完成进料、夹紧、钻孔、车削、工件翻身掉头、车削另一端的外圆锥面、镗球座孔、钻小油孔、冲槽、清洗、加珠、收口、出料的全过程 ,并设有计数机构和电脑控制定位超长、断钻头、无珠报警及自动停车功能 ,可以加工球珠直径 0 .5mm～ 1.0mm各种规格的镍白铜、不锈钢水性、中性圆珠笔头。多工位圆珠笔头自动加工机床推出@胡正隆…     

注射模标准模架导柱车削加工自动生产线设计

介绍了注射模标准模架的导柱车削加工自动生产线的组成,对机床的合理配置作了分析,使整条导柱车削加工自动生产线能够合理高效运行,详细阐述了机械手运行的主流程图、机床上料流程图、机械手垛机上料流程图,达到更好地实现车削加工自动化生产的目的。     

多工位圆珠笔头自动加工机床推出

浙江省平阳县敖江镇工兴路季绍龙推出了多工位圆珠笔头自动加工机床。它主要用于圆珠笔头的加工 ,也可用于加工其它微型带深孔轴类零件 ,如气门芯、打火机气咀等。操作时 ,毛坯加入料斗后 ,能自动完成进料、夹紧、钻孔、车削、工件翻身掉头、车削另一端的外圆锥面、镗球座孔、钻小油孔、冲槽、清洗、加珠、收口、出料的全过程 ,并设有计数机构和电脑控制定位超长、断钻头、无珠报警及自动停车功能 ,可以加工球珠直径 0 5ｍｍ～ 1 0ｍｍ各种规格的镍白铜、不锈钢水性、中性圆珠笔头多工位圆珠笔头自动加工机床推出@胡正隆…     

汽车齿轮车削和滚齿复合机床研究

根据汽车行业对高精度齿轮的需求,通过自主创新的途径,重点攻克了车削和滚齿复合机床总体结构、机床数控系统、高速干式滚切工艺系统温度场控制、硬质合金高速干切滚刀等关键技术难题,研发一种汽车齿轮高精度高速车削和滚齿复合机床。机床采用基于运动控制卡的开放式数控系统,采用3种方法减少滚齿加工机床热误差变形,采用三合一组合齿轮加工刀具。将齿轮加工的全部工艺集成在一台机床内,能通过一次装夹完成车削、滚齿和去毛刺加工。由于节省了上下料时间,生产效益得到了很大的提高,实现了齿轮滚切高效、高精度、节能环保加工。     

全自动CNC镗削活塞销孔专机的研究开发

所研制的全自动ＣＮＣ镗削活塞销孔专用机床可以实现工件的自动上、下料和自动定位、夹紧,并且在一次安装、不停机、不换工位的情况下,高效地完成活塞销孔的镗孔、镗外口、切挡圈槽、倒内角和倒外角。该机床已在上海活塞厂投入生产,并取得了良好的加工效果。     

双主轴双刀塔车削中心上典型零件的加工

复合加工机床是指具有多种加工性能的机床,用工序集成的方法提高生产效率,提高机床的附加价值.文章以日本MAZAK公司的五轴联动车削中心为例,选用了一典型工件进行加工,展示了以车削加工为主体的复合加工机床通过双主轴头方式,可以不用卸下工件通过交替方法将另一端进行加工的性能.     

中凸变椭圆活塞数控车床的研究

根据中凸变椭圆活塞数控车削加工的特殊要求,设计基于TURBO PMAC的非圆截面活塞车削数控车床。x轴进给系统采用直线电机与伺服电机双驱动结构,保证对不同规格活塞加工的径向调整适应能力和小行程高频响的非圆加工性能。采用整体床身和斜刀架结构,提高了切削刚性,优化了机床的整体性能。     

细长轴车削加工径向变形和切削力的分析计算

为减少细长轴的车削加工误差,论文对某细长轴的精加工车削和粗加工车削过程进行了分析,结合实际加工情况运用有限差分法和有限元法(不考虑加工机床主轴组件和尾座的刚性和考虑加工机床的刚性)分别求出精加工车削和粗加工车削过程细长轴外轮廓变形和径向切削力的变化,为细长轴的自动加工控制、减少加工误差提供各种数据,从而提高细长轴的加工质量。     

苏联制动鼓的加工和装配

意大利“莫兰道”杜林公司为苏联李哈乔夫汽车厂提供了一套加工装配汽车制动鼓和轮壳的设备。这套设备除完成加工工序外,还包括清洗、平衡、轴承座抛光以及全部检验工序。 这套设备的开头是两条平行自动线,分别用来同时加工制动鼓和轮壳总成。制动鼓自动线是由车削用的三台双轴卡盘机床和一台立式双工位钻孔、倒角机床组成。加工轮壳的第二条自动线是由车削用的六台双轴卡盘机床和两台立式双工位钻孔、倒角、攻丝、铰孔机床组成。     

在活塞两端面加工过程中实现高,低压液压夹紧的自动转换

本文介绍了在一台加工活塞两端面的专用机床上应用的一种由高压夹紧自动地转换为低压夹紧的液压系统。     

转轮电极的线切割加工

介绍了在普通线切割机床上加工转轮电极的操作步骤,提高了转轮电极的制造效率和制造精度,拓宽了普通线切割机床的加工工艺范围,为普通线切割机床实施螺旋加工提供了一种行之有效的方法。     

基于支持向量机的蠕墨铸铁表面粗糙度预测

目的准确预测蠕墨铸铁加工过程中的表面质量,指导加工参数调整,保证加工过程中加工质量的稳定,运用差分进化算法优化的SVM模型(DE-SVM)构建蠕墨铸铁表面粗糙度(Ra)预测模型和加工参数选择方法。方法采用DE-SVM提高支持向量机回归模型的预测精度,建立针对实际加工材料的表面粗糙度预测模型,基于构建的预测模型,挖掘表面粗糙度与加工参数之间的关系,从而获得较优的加工参数。结果结合蠕墨铸铁的铣削加工实验数据,对比DE-SVM与常用优化算法(粒子群优化算法(PSO)和遗传算法(GA))优化的SVM模型,DE-SVM模型获得的MAPE(0.122)和R2(0.9559)值均优于粒子群和遗传算法优化的支持向量模型获得MAPE和R2值。在给定的加工参数范围内,切削速度和进给速度对表面粗糙度的影响较大,且表面粗糙度与切削速度成正比关系,与进给速度成反比,而切削深度对表面粗糙度影响不显著。结论由实验的对比结果可知,采用DE-SVM模型建立的蠕墨铸铁表面粗糙度模型具有更高的预测精度,基于DE-SVM获得的加工参数对表面粗糙度的影响,可有效指导加工参数的选择与调整,对保持蠕墨铸铁优良的加工质量具有较好的指导意义。     

螺旋锥齿轮端铣加工刀位计算方法

针对螺旋锥齿轮在数控加工中心上加工效率低的问题,提出利用盘状铣刀对螺旋锥齿轮进行端铣的加工方法.由螺旋锥齿轮齿面及刀具的几何特征,调整铣刀与被加工齿面的相对位置,使齿面与刀具包络面的法截面相对法曲率最小,增大切削带宽,同时控制刀轴矢量调整切削深度避免加工干涉.最后将规划的加工刀位转化到数控机床轴上,利用VERICUT进行加工仿真验证该方法的可行性与正确性.     

Cutting process of glass with inclined ball end mill

Cutting processes with ball end mills are discussed for machining microgrooves on glasses. A surface is finished in undeformed chip thickness less than 1 μm at the beginning and at the end of the cut during the cutter rotation. The milling process is applied to glass machining. A crack-free surface can be finished in a large axial depth of cut more than 10 μm. Because glass undergoes almost no elastic deformation, roughness on a cutting edge in glass machining has a larger influence on surface finish than that of metal machining. The rotational axis of the tool is inclined to improve the surface finish. The cutting processes are modeled to show the effect of the tool inclination on the machined surface with considering the edge roughness. The tool inclination compensates for deterioration of the surface finish induced by the edge roughness in the presented model. The improvement of the surface finish is verified in the cutting experiments with the tool inclination. The orthogonal grooves 15–20 μm deep and 150–175 μm wide, then, are machined with the crack-free surfaces to prove efficiency and surface quality in the milling process.     

Corner optimization for pocket machining

The aim of this paper is to propose a pocketing tool path improvement method by adapting the geometry of the tool path to the kinematic performance of high speed machining machine tools. The minimization of the machining time is a major objective, which should be taken into account for the tool path computation. In this way the tool path length can be reduced or the real feedrate increased. The described method proposes modification of the values of the corner radii in order to increase real feedrate. In the same way, this method checks the radial depth of cut variations along the tool path. The computed tool path presents a smaller length and the machine tool produces a higher average feedrate at the same time. In addition, the use of Bspline for the tool path computation is a significant improvement compared with straight lines and circle arcs for the machining time reduction. Several tests are realized on various machine tools in order to quantify the benefits: the proposed method can reduce the machining time by approximately 25% compared with classical tool paths computed using a CAM system.     

放射性伽玛刀切割机的设计

介绍一种能在防辐射的热室中切割废弃伽玛刀的切割机。该切割机除了装取伽玛刀用机械手完成外,整个切割过程自动完成。针对自动切割过程中,放射性伽玛刀的安装定位、夹紧、切割位置、切割方式等关键问题进行分析,完成了整机的功能原理分析,同时对控制系统进行了设计。该机满足放射性伽玛刀的切割要求,可将伽玛刀内部的高放射性Co60和低放射性的内外包壳分离并分别进行处理,使处理废弃伽玛刀的成本大大降低,具有较高的经济效益。     

浅谈4轴加工编程的切削方法

随着加工工艺与机床的不断更新及发展,多轴加工机床在企业的应用也越来越普及,多轴加工技术也在不断的被引入学习及推广应用。在多轴加工与编程过程中,随着越来越多的优秀编程师涌入,加工技术也在不断地进步。在4轴编程的加工案例中,有多种方法都可以实现切削加工,为了更好的交流与发展,对于4轴加工编程中的切削的重点与难点进行了总结,希望对于刚入行的编程师能提供一些建议,便于快速成长。     

Achieving Small Structures in Thin NiTi Sheets for Medical Applications with Water Jet and Micro Machining: A Comparison

NiTi shape memory alloys (SMA) are used for a variety of applications including medical implants and tools as well as actuators, making use of their unique properties. However, due to the hardness and strength, in combination with the high elasticity of the material, the machining of components can be challenging. The most common machining techniques used today are laser cutting and electrical discharge machining (EDM). In this study, we report on the machining of small structures into binary NiTi sheets, applying alternative processing methods being well-established for other metallic materials. Our results indicate that water jet machining and micro milling can be used to machine delicate structures, even in very thin NiTi sheets. Further work is required to optimize the cut quality and the machining speed in order to increase the cost-effectiveness and to make both methods more competitive.     

Prediction of chatter in NC machining based on a dynamic cutting force model for ball end milling

Ball end milling is one of the most widely used cutting processes in the automotive, aerospace, die/mold, and machine parts industries, and the chatter generated under unsuitable cutting conditions is an extremely serious problem as it causes excessive tool wear, noise, tool breakage, and deterioration of the surface quality. Due to the critical nature of detecting and preventing chatter, we propose a dynamic cutting force model for ball end milling that can precisely predict the cutting force for both stable and unstable cutting states because our uncut chip thickness model considers the back-side cutting effect in unstable cutting states. Furthermore, the dynamic cutting force model considers both tool runout and the penetration effect to improve the accuracy of its predictions. We developed software for calculating the cutting configuration and predicting the dynamic cutting force in general NC machining as well as single-path cutting. The chatter in ball end milling can be detected from the calculated cutting forces and their frequency spectra. A comparison of the predicted and measured cutting forces demonstrated that the proposed method provides accurate results.