提高车床主轴套料效率的对策

从影响套料质量的因素--人、机、料、法、环入手进行分析,结合实际情况,抓住影响套料工序质量的关键因素,制定出合理的对策,取得较好的经济效益.     

套料刀具的改进

好的切削性能,这是共性,包括刀具材料的选择,合理的刀具几何参数,但同时必须考虑到每一种刀具特有的个性,否则会造成使用上不方便,甚至无法使用。 我厂有一个产品,有一道工序上要在φ45mm,壁厚2ram的管子上钻一个φ24mm的孔。于是设计了图1所示的专用套料刀。     

钛合金的深孔套料工艺试验研究

根据钛合金的材料特性和切削加工性能,设计和制造了适合于加工钛合金工件的套料钻并制定相应加工工艺,并对钛合金进行深孔套料加工试验.试验结果表明,切削过程稳定可靠,通过套料加工可显著提高钛合金的材料利用率,为钛合金套料提供了一套有效的加工工艺方法.     

深孔镗床的套料加工工艺

介绍了套料加工在深孔镗床上的应用,阐述了套料加工原理,以深孔钻镗床为例,对工装设计及加工参数进行了说明,并可以逐步推广到多种规格及设备的使用上去.实践证明,该工艺在节约成本、提高生产效率等方面具有较大实用价值.     

CW61100A车床溜板箱的改装

我国自行设计制造的CW61100A车床比相应的老产品1 65、C650具有精度高、万能性好、操纵灵活方便等优点。但是溜板箱超越离合器和安全离合器有一些问题。如图1所示,超越离合器2设在光杠10外边,光杠10靠超越离合器外壳内的铜套3支承定位。当溜板作快速移动时,外壳以1904转/分的速度相对光杠10旋转。此处润滑条件差,光杠10上还有一个通键槽,致使钢套3迅速磨损,几个月的时间 即可磨损达1毫米以上。由于铜套 3磨损后影响光杠10定位不稳, 因而造成光杠10上的超越离合器 星形体与外壳之间结合不稳定,致 使走刀不匀,甚至不走刀。另外, 由于位置的…     

CW61100E型卧式车床导程的加大及改进方法

加大卧式车床可加工螺纹的导程和拓宽导程范围，是提高机床性能的有效手段之一。本文叙述如何在某一特定的车床上加大导程的方法及提高导程设计精度的措施。     

CW61100B/8米卧式车床对接床身联接设计计算

随着现代制造业的发展,市场对大型、重型及长规格工件的加工设备需求越来越多,机床接长技术也成为各机床厂家必须掌握的技术,作为机床接长技术中重要的一个方面一床身的对接,人们会在实践中探索出更多的可取的结构及方案,对接方法也会越来越成熟可靠。     

CW61100A普通车床的丝光杠机动托架

车床的丝杠和光杠(以下简称两杠)由于自重而产生弯曲变形。据测定, CW 61100 A型普通车床所用的光杠,当长度为5m时,其中部下垂量约 6 mm;当长度为 10 m时,其下垂量约 15 mm。两杠产生弯曲变形后,不仅影响传递运动的精度及平稳性,对机床的寿命也十分不利。为此,在两杠下方的适当部位加辅助支承。辅助支承有手动挂架、随动拖架和机动拖架等多种形式,其中以机动托架较为优越。因此,机动拖架在较长规格的床子上得到了广泛的应用。 在我厂产品 CW 61100 A型普通车床上采用的机动托架,经过不断改进和多年使用证明,它是目前较为理想的一种结构,…     

自制套料钻解决端面环形深窄槽加工难题

环形深窄槽型结构零件加工区域窄、切削阻力大、排屑不畅、散热效果差、刀具刚性弱易损坏,进而造成零件加工难度较大、加工质量难以保证、生产效率低等问题.针对以上问题,分析和阐述了制约深窄槽型结构零件加工质量和效率的主要因素,提出了自制套料钻替代传统车削和铣削加工方法,综合考虑刀具在切削加工过程中的影响,针对性地采取有效措施,...     

电火花套型加工中工艺步骤对加工效果的影响的探讨

介绍了电火花套型加工研究中所用的实验设备、工具和加工电规准,阐述了所采用的数控加工程序的编制,不同的工艺步骤的实施方法和加工的模具型腔和型芯.对不同的工艺步骤的的加工结果进行了分析对比和归纳小结,最后总结了工艺步骤对加工效果影响的结论.     

变频器在车床主轴控制系统中的应用

数控机床的技术水平高低及其在金属切削加工机床产量和总拥有量的百分比,是衡量一个国家国民经济发展和工业制造整体水平的重要标志之一.数控车床是数控机床的主要品种之一,它在数控机床中占有非常重要的位置,几十年来一直受到世界各国的普遍重视,并得到了迅速的发展.主轴是车床构成中一个重要的部分,对于提高加工效率,扩大加工材料范围,提升加工质量有着重要的作用.     

加工曲轴主轴颈车床的刀具设计

在不更换刀具的情况下,可连续加工工件,有效保证了工件的精度,提高了加工效率。     

Influence of thermal displacement of the spindle axis in a lathe on the machining precision

The T-FLEX CAD 3D system is used to construct a three-dimensional model of the spindle head in an MK-3002 lathe and a model of the thermal conditions in spindle rotation. Four attachment options for the spindle head’s housing are considered. The optimal attachment option is established.     

数控车床在调节阀多级节流阀杆加工中的应用

介绍了应用数控车床加工调节阀多级节流阀杆时程序的计算及编程中应注意的问题。     

Investigation into the blade-formation process in electrochemical trepanning of diffusers

Abstract

Electrochemical trepanning process is an advanced manufacturing technology suitable for the machining of aero-engine components such as blades and diffusers. Tool-electrode (cathode) with special electrical isolation is adopted in the experimental investigations of this article using the electrochemical trepanning to produce a flow mode in which the electrolyte is supplied evenly to the blade being machined. The material removal model for these experiments is built based on the main technical principles of the ECM. For a better understanding of the electrochemical trepanning process during the machining of a blade, computer simulations were previously conducted aiming to observe the geometric shaping of the inter-electrode gap. The shaping process dynamic was analyzed and the distribution of electrical field intensity within the gap has been obtained under different feed rates of the tool-electrode relative to the blade. The profile of the cross-section of the blade was evaluated through the simulation, thus indicating that the blade’s taper angler decrease by increasing the feed rate. Also, practical experiments have been carried out, where the corresponding experimental results proved the simulation was effective. The best taper angle (0.70°) resulted from a machining condition in setting up a feed rate of 4?mm/min, whereas 3.72° was produced using 1?mm/min. Furthermore, a sector with multiple blades was electrochemically manufactured with the optimal set up of experimental parameters, being that the machining accuracy was about 0.12?mm. The application reflected that the method proposed in this article is appropriate and can be used for other complex structures in electrochemical trepanning.     

基于人因工程的提高生产率模型的设计与应用

根据我国企业自身的特点,应用人因工程理论,提出基于人因工程的提高生产率模型.研究表明,利用该模型进行生产率的提高,不仅保证作业的高效率,同时还能保证人体的健康、安全和舒适.     

冲模寿命影响因素的分析研究

采用图表方式分析了影响冲模寿命的各种因素,提出了改善措施,提高了冲模的寿命.     

On the design and development of a new BTA tool to increase productivity and workpiece accuracy in deep hole machining

This paper presents the design and method of development of a new three-pad BTA tool. The advantages of this cutting tool over a conventional two-pad BTA tool are brought out using a probabilistic approach in both the static and dynamic case. Experiments were conducted with the new three-pad tool, and it confirmed the theoretical prediction that the three-pad tool is more stable than the conventional BTA tool. Also, the cause of grooves observed on the workpiece produced by the two-pad tool has been explained. Further, it is observed that the third pad stiffens the tool thereby improving the chip breaking effect which improves the quality of the holes produced at high feeds. Thus this new development increases the productivity and improves workpiece accuracy in deep hole machining.