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用小型刀具加工小型工件可不是件轻而易举的小把戏.实际的加工操作只是整个工件加工流程中的一个组成部分而已,很多其他的工序环节在加工微型工件的过程中也是值得我们关注的大问题.一些涉足该领域的加工企业倾向于采用不同于传统车间的思维方式来进行刀具的安装、工件的检测以及零件的组装等工作,完成那些比碎屑还要小的工件的加工. 相似文献
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尹沂秋 《机械工人(冷加工)》1987,(12)
我厂使用图示的顶尖,精车小型轴类工件,能保证同轴度要求。可以不停车装夹工件,用左手拿着工件,右手摇尾座使弹簧顶尖9对准工件中心孔,顶紧后加工。车好工件后,摇回顶尖工件即可通过落件装置滚入工件箱内。 相似文献
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《机械工人(冷加工)》1974,(10)
小型电火花机由工作机构和电气控制箱两部分组成,用于取出折断在工件中的丝锥、钻头,并可以在硬金属上加工孔或异形孔槽。小型电火花机具有下列特点:1.结构简单,便于制造和维修,2.体积小,重量轻(工作机构与电气控制箱总重约30公斤),提携方便,可以安装在大型工件上进行加工;3.能加工M24以内的丝锥和φ26以内的钻头;4.无论通孔、盲孔均可加工;5.效率较高,加工M12丝锥,25毫米深(指 相似文献
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在通常情况下,普通外圆磨床既可以磨削工件的外圆,也可以磨削工件的锥体、凹槽、端面等。但由于外圆磨床的工作台一般都比较狭长,因此,能回转的角度也受到限制,也就无法直接在它上面磨削小型工件的各种锥体。柴油机上的精密部件——喷油器总成上的针阀,它的各级锥体和外圆的几何精度、粗糙度等技术要求 相似文献
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用小型刀具加工小型工件可不是件轻而易举的小把戏。实际的加工操作只是整个工件加工流程中的一个组成部分而已,很多其他的工序环节在加工微型工件的过程中也是值得我们关注的大问题。一些涉足该领域的加工企业倾向于采用不同于传统车间的思维方式来进行刀具的安装、工件的检测以及零件的组装等工作,完成那些比碎屑还要小的工件的加工。 相似文献
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<正> 当夹紧小型工件的螺纹部分进行切削加工时,可采用简图所示的这种简易夹具,效果相当理想。在夹具体上加工内螺纹,与工件螺纹部分相配,且螺纹端面靠在内滑塞子上。此外,从夹具体上插入圆锥销,这样就能可靠地夹紧工件。对于右旋螺纹及正常的主轴转动方向,切削力能使工件夹紧。 相似文献
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NJ-5HMC40是精密级的加工中心,机床具有高效率、高精度、高柔性的特点.机床在工件一次装夹后,可完成铣、镗、铰、攻丝和轮廓的粗、精加工.广泛适用于叶片、叶轮、模具工业、航空和船舶工业等各种类型的机械加工行业中的复杂曲面零件加工,能满足中、小型箱体零件和空间曲面多品种加工的需要. 相似文献
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李苏荣 《现代制造技术与装备》2018,(1)
薄壁零件以其轻巧、节约材料、结构紧凑等优势被人们广泛应用在产品的生产中,但车床上的一些薄壁结构比较复杂,在夹紧力的作用下容易变形,由此影响了工件制作尺寸精确度和形状精确度。为此,在阐述小型薄壁零件结构、技术要求和加工难点问题的基础上,从道具选择、工件装夹、程序编制等方面分析进一步优化小型薄壁零件数控车的加工技术,旨在有效解决小型薄壁零件的加工难题,提高产品质量。 相似文献
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《汽车零部件》2012,(7):1-4
十一五期间,我国汽车电子电器工业取得了长足进步和高速发展,培育了一批具有国际优势的零部件生产企业,得以进入国际汽车零部件采购体系,并使我国成为世界汽车零部件的重要供应基地.一系列举措为支持汽车工业,尤其是自主品牌的整车和零部件企业的发展,作出了重要贡献.十二五期间,全球化发展步伐加快.海外并购、贸易争端、技术壁垒频现,汽车电子电器行业将迎来前所未有的机遇和挑战.在中国汽车零部件电子电器发展中心2012年年会召开之际,中国汽车零部件电子电器发展中心(如下简称电子电器发展中心)理事长田亚梅畅谈电子电器行业热点;并介绍了一直致力于服务中国电子电器行业的行业组织——电子电器发展中心. 相似文献
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通过研究变速箱泵盖薄壁零件的机加工工艺,解决了薄壁件加工易变形、高精度内外圆位置度等技术难点,关键尺寸过程能力满足要求,制造过程稳定,具备了大批量生产的条件。 相似文献
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在普通铣削加工中,型腔类零件大都是使用成形刀具直接成形出来的。但是切削时刀具处于满刃状态、切削受力大、排屑差,零件的精度与表面粗糙度难以控制和达到要求。利用数控铣削加工此类零件均可通过走刀轨迹加工并能达到零件图要求。但在实际加工时(比如深槽加工、内腔转角圆弧小且内腔深度较大)都应在工艺上做相应的处理。通过对圆腔、方腔、带孤岛的腔体类零件的分析与数控加工可知加工工艺的确定非常重要。 相似文献
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Characterization and compensation of dynamic errors of a scanning coordinate measuring machine 总被引:3,自引:1,他引:3
The necessity for reducing production cycle times while achieving better quality compels metrologists to look for new and improved ways to perform the inspection of parts manufactured. The advent of coordinate measuring machines led to a significant boost in accuracy, flexibility and reliability for measurement tasks. However, these machines are in some instances lagging behind machine tools and need improvement. One major limitation is the execution of measurements with low uncertainty at a reasonably fast rate to make it possible to measure more parts. This would ensure more reliability to the end product and better information to control the manufacturing process. Coordinate measuring machines with scanning capabilities offer the option to output high data density for parts at high speed. However, they are still considerably less accurate at faster measurement speeds and need to be improved. In this work a scanning measuring machine was extensively tested and a compensation model that accounts for part of its dynamic errors affecting measurement of circular features is proposed. 相似文献
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J.S. Choi 《International Journal of Mechanical Sciences》2010,52(10):1269-468
In the present investigation, an equal channel angular extrusion (ECAE) was used to make bulk nanostructure of the commercially available aluminum alloy AA1050 at room temperature. In order to investigate the effect of the ECAE routes on formability, three different routes A, Bc, and C were applied up to three passes by employing a split die set-up, which required less extrusion load compared with the conventional dies. Formability of the conventional and ultra-fine grained specimens was measured by applying a compression test. Considering the formability obtained from the compression test, bolt forming sequences were developed into three stages and applied to manufacture a high strength bolt using a cylindrical ultra-fine grained specimen at room temperature. The effects of processing routes and number of passes in the ECAE on strength increase and its homogeneity in the manufactured bolts were investigated by the tension and microhardness test, respectively. According to this investigation, a novel approach to utilize the ECAE to manufacture high strength bolt using the conventional material is demonstrated. This approach can be extended to other manufacturing parts that require high strength and lesser weight at a competitive manufacturing cost. 相似文献
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液压阀块是液压系统的重要组成部分,采用锻造-钻铣传统方法加工的流道只能采用直孔形式并且管路交叉沟通不灵活。选区激光熔融增材制造克服了传统加工的限制,可实现两端盲孔流道加工、任意走向及任意曲率流道加工,并能剔除非必需质量,实现液压阀块的集成化、轻量化和节能化设计。与传统阀块相比,金属增材制造液压阀块体积降低30%以上,重量降低50%以上。但是金属增材制造受到悬垂部件阈值角度限制,传统圆形截面流道加工存在局部支撑结构,而阀块内部复杂流道的支撑结构很难去除,因此削弱了增材制造技术在轻量化和节能化方面的效果。以减少内部流道的辅助支撑为目标,提出采用异形截面流道的设计方案,通过理论分析和仿真对比,实现少支撑甚至零支撑的内部流道设计效果,为液压元件的增材制造技术提供理论支撑。 相似文献
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This paper is the first in a series of articles which comprehensively discuss the state-of-the-art in microscale additive manufacturing processes and present solutions to challenges impeding their scalability. In this paper, a class of additive manufacturing techniques known as Direct Ink Write/Jet Processes are explored which have been used by researchers for fabrication of microscale parts with varying geometric freedom. The paper identified the key challenges to high throughput 3D microfabrication using these processes, by analyzing the material constraints, geometric constraints, feature-size resolution limits and throughput limits. While some of these challenges can be overcome by novel precision engineering approaches, there are several others which need an acute understanding of material systems, process parameters and critical components. This paper identifies these challenges and suggests potential approaches to eliminate them with the goal of fabricating true-3D parts at high throughputs. 相似文献