共查询到19条相似文献,搜索用时 121 毫秒
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《现代制造技术与装备》2021,(1)
高速精密级进模具在手表零件中的应用实例较少。对比棘爪拨片零件的普通加工方案和高速精密级进模具生产方案,阐述高速精密级进模具在产品质量、合格率和加工时间等方面的优势,以说明高速精密级进模具在手表类零件生产中的重要性。从设计难度和制造难度等方面与普通模具进行对比,充分证明了手表机芯类零件进行高速级进模具升级的重要性和必要性。 相似文献
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论述了高速加工技术应用于模具制造的优点及当前存在的问题。总结了高速加工对刀具路径要求。以飞轮壳凹模高速数控加工程序编制为例,详细介绍了利用Cimatron E7.0软件编制模具高速加工程序的方法。提出了利用设计模具编程模板解决当前某些问题的方法。编程模板在模具数控加工中的应用,实现了CAPP与CAM编程的一体化操作和信息的有效集成,帮助工艺人员快速、精密地完成零件的加工制造,并且不仅使加工效率大大提高,还使模具表面质量更佳,使用寿命更长。 相似文献
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使用精密球头铣刀进行高速铣削加工可以加工出各种形状的曲面,因而在模具生产及单件零件生产中得到了广泛的应用。球头铣刀高速铣削加工的切屑形成过程有它的特殊性。因而适当选择加工参数来调整最小切削厚度可以获得更好的铣削过程。 相似文献
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作为向工模具和高精密零件制造业提供设备及系统解决方案的供应商,GF阿奇夏米尔集团是世界放电加工机床和高速铣削领域的领导者,它的产品涵盖了放电加工机床、高速铣削加工中心和高性能加工中心,包括装夹定位系统、服务支持、备件及易损件、消耗品以及自动化解决方案等。 相似文献
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《世界制造技术与装备市场》2006,(1):68
北京阿奇夏米尔公司在CCMT 2006展出4台机床:2台数控精密电火花成形机,1台高精度低速走丝线切割机,1台数控高速走丝线切割机。这4台机床都是适合于模具及特殊形状零件或异形零件加工的数控电加工机床,其中SA20数控精密电火花成形机是其新产品。 相似文献
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高速切削是制造技术中引人注目的一项先进金属切削技术,其应用面广泛,对制造业产生了较大的影响,在航空航天制造业、模具加工业、汽车零件加工、高精密零件加工等领域得到广泛应用。 相似文献
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采用CAD/CAM的高速数控加工技术研究 总被引:1,自引:0,他引:1
分析CAD/CAM软件对高速数控加工零件精度的影响,从高速加工的刀具路径及加工顺序选择等方面论述高速加工工艺技术及策略,提出高速加工中应注意的事项,对解决精密零件及复杂零件的高效加工具有一定的实际意义。 相似文献
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超高速精密非圆轮廓磨削研究进展 总被引:1,自引:1,他引:0
李波 《精密制造与自动化》2010,(1):20-23
阐明了非圆轮廓形零件超高速高精密磨削的必要性,深入讨论了非圆轮廓形零件超高速高精密磨削的磨床数控系统集成、非圆轮廓形零件高速高精密磨削加工的研究进展。非圆轮廓形零件的高速高精密磨削加工有着深远的意义。 相似文献
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金易编译 《机械工人(冷加工)》2011,(7):71-72
近年来,随着电火花成形加工技术的进步,无论是用于加工模具,还是加工最尖端的精密零件都作出很大贡献。在零件加工领域中可以举出的是:飞机发动机的相关零件、医疗器械的各种零件,以及特殊工具的加工。另外,在加工模具的情况下,除了使用通常的模具钢之外,还增加了加工特殊材料的模具。 相似文献
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C.K. Toh 《The International Journal of Advanced Manufacturing Technology》2006,27(5-6):473-480
The use of high-speed milling (HSM) for the production of moulds and dies is becoming more widespread. Critical aspects of
the technology include cutting tools, machinability data, cutter path generation and technology. Much published information
exists on cutting tools and related data (cutting speeds, feed rates, depths of cut, etc.). However, relatively little information
has been published on the evaluation of cutter paths for this application. Most of the research focuses on cutter path generation
with the main aim on reducing production time. Work concerning cutter path evaluation and optimisation on tool wear, tool
life and relevant workpiece machinability characteristics are scant. This paper investigates and evaluates the different cutter
path orientations when high-speed finish milling inclined hardened steel, at a workpiece inclination angle of 75°. The results
demonstrate that employing a vertical downward orientation achieved the longest life. However, in terms of workpiece surface
roughness, vertical upward orientation is generally preferred. 相似文献
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E.-S. Lee 《The International Journal of Advanced Manufacturing Technology》2000,16(11):814-821
In recent years, grinding techniques for precision machining of brittle materials used in dies, moulds and optical parts have
been improved by using superabrasive wheels and precision grinding machines. Optimum dressing using a superabrasive wheel
makes possible the effective ultraprecision grinding of die steel (STD-11). In this study, a new system and the grinding mechanism
for optimum in-process electrolytic dressing are proposed. This method can carry out optimum in-process electrolytic dressing
of a superabrasive wheel. Optimum in-process electrolytic dressing is a good method for obtaining efficiency and ultraprecision
grinding of STD-11. 相似文献
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《Measurement》2016
We present a method for investigating the process of ball end milling, a technology widely used in tool making and moulding. We analyse the main features of free-form surfaces used in this technology, and propose a sequence of steps to identify the most suitable milling strategy. The basic idea of such a sequence lies in the definition of the tangible fragments of free-form surfaces applicable to tool making. Tangible fragments represent the parts of tooling and signed radii that can distinguish both the active and transitional surfaces of tooling. Free-form surface fragments were selected since they are capable of securing definiteness in measurement of roughness parameters and surface errors. We investigated the operation capability of solid ball end milling cutters in terms of cutting tool edge micro-geometry. Cutting edge radius (rn) and roughness parameters of the tool edge were measured to determine the relationship between new and worn tool edges. Roughness parameters were measured at different parts of the machined surfaces, which take on typical features of dies and moulds, such as inclined wall, ridge lines, valley lines, as well as, the active surfaces defined by signed radii. Surface error such as scallop height, gouging, tolerances and actual signed radii were measured at transitive surfaces. The traditional approach of evaluating roughness parameters was used to determine the suitability of factors such as milling operation, milling strategy and direction of milling. In addition, traditional approaches such as relationships, distributions and histograms were also used. We applied Khattree–Naik’s plot, which proves its suitability to visualise all the data being measured in the same units: microns and millimetres. Characteristic features of the ball end milling process, such as tool edge micro-geometry, geometry of the machined surface, and unit length of the transitive surface were applied in Khattree–Naik’s plots. We found that this plot was capable of processing multivariate data to distinguish specific markers of the quality of machined surfaces, which are produced in ball end milling. 相似文献
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Avoiding neural network fine tuning by using ensemble learning: application to ball-end milling operations 总被引:2,自引:2,他引:0
Andres Bustillo Jos��-Francisco D��ez-Pastor Guillem Quintana C��sar Garc��a-Osorio 《The International Journal of Advanced Manufacturing Technology》2011,57(5-8):521-532
Surface roughness plays a key role in the performance of machined components??specially dies and moulds??manufactured for the aerospace and automotive industries, among others. However, roughness can only be measured off-line after the part has been machined, when cutting conditions may no longer be adjusted to surface roughness requirements. A reliable surface roughness prediction application is presented in this paper. It is based on ensemble learning for vertical high-speed milling operations with ball-end mills for finishing operations on quenched steel 1.2344 (AISI H13) that are widely used in the manufacture of moulds and dies. The new approach was validated with an experimental dataset that includes geometrical tool factors, cutting conditions, dynamic factors and lubricant type. An intensive comparison with an artificial neural network approach for the same dataset is included, to reveal the improvements of the new technique over other well-established ones for this industrial problem. This comparison shows that ensemble learning can by-pass the time-consuming task of tuning neural network parameters and can also improve prediction model accuracy, both of which are features that could lead to greater use of these kinds of prediction models in real workshops. Finally, a methodology, based on this new approach, is presented, in order to illustrate how the prediction model can be used in workshops to optimize cutting conditions in terms of their surface quality and productivity. 相似文献
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C. Tournier E. Duc 《The International Journal of Advanced Manufacturing Technology》2002,19(5):318-324
The machining of sculptured surfaces such as moulds and dies in 3-axis milling relies on the chordal deviation, the scallop
height parameter and the planning strategy. The choice of these parameters must ensure that manufacturing surfaces respect
the geometrical specifications. The current strategies for machining, consist primarily in driving the tool in parallel planes
which generates a tightening of the tool paths. A constant scallop height planning strategy has been developed to avoid this
tightening. In this paper, we present a new method of constant scallop height tool-path generation based on the concept of
the machining surface. The concept of the machining surface is developed and its use to generate constant scallop height tool
paths is described. The approach is compared with existing methods in terms of precision and in particular its aptitude to
treat curvature discontinuities. 相似文献
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介绍了轮胎模具的3种加工工艺方法,即铝合金精密铸造、电火花加工和高速铣削加工;列举了3种工艺的特点及应用局限性,并对3者进行了对比,综合分析了3种轮胎模具加工工艺的选择. 相似文献