深小孔加工方法综述

深小孔在各个领域中有着广泛的应用。深小孔加工方法主要分为传统加工方法和非传统加工方法两大类。文中主要对钻削加工、电火花加工、电解加工、电解-电火花复合加工以及其他加工方法进行了详细的分析,并总结了各加工方法的优缺点。     

加工方法对基于CAD/CAM数控曲面加工质量与效率的影响

对基于CAD／CAM的三坐标数控曲面加工的参数线加工方法、截面线加工方法和投影加工方法的加工表面质量、加工效率、编程的方便性及零件加工程序规模进行了理论分析和实验研究,为合理选用三坐标数控曲面加工方法提供了参考依据。研究结果表明：在相同加工曲面和工艺条件下,参数线加工的加工表面质量较高,截面线加工的加工效率较高,投影加工编程方便且具有较大的综合优势。文中给出了在相同加工曲面和工艺条件下,参数线加工、截面线加工和投影加工方法的零件加工表面粗糙度、加工时间、零件加工程序规模的实验数据,并据此提出了它们的适用范围。最后,提出了提高三坐标数控曲面加工质量和效率的措施。     

枪管渐速膛线数控电解加工方法的研究

针对现有膛线电解加工方法存在的只能加工固定缠距膛线、不能加工渐速膛线等问题,根据膛线电解加工方法和工作原理,提出枪管渐速膛线数控电解加工方法。通过对渐速膛线数控电解加工方法相关理论的分析,确定渐速膛线数控电解加工方法原理方案。新的渐速膛线数控电解加工方法不仅解决了在同一台设备上加工不同类型和规格膛线的问题,而且简化了机床结构,为枪管膛线电解加工提供了新的加工方法和设备,对枪管膛线的研究和发展具有重要的作用和实用价值。     

硬车削加工技术对产品质量成本的影响

针对采用淬硬钢及高强度钢加工模具及工件的迅速增加、而传统的加工方法工效低、成本高这一问题，通过对加工技术要求和加工条件的分析比较，从硬车削加工的特点，加工方法、刀具的选用等几个方面进行论证，并通过在生产加工中局部应用对工艺方法进行验证，发现硬车削加工的方法完全能取代传统的加工方法，可大大提高生产效率和降低制造成本。     

聚晶金刚石加工技术进展

介绍了国内外正在研究和已经应用的聚晶金刚石的主要加工方法,即磨削加工、研磨加工、电火花加工、激光加工、化学加工、超声加工和复合加工,并对这些加工方法的特点、机理及影响因素、适用范围进行了分析。     

影响机械加工精度的几种因素

为了提高工件的加工精度,通过分析传统机械加工方法、数控加工方法、特种加工方法加工精度的主要影响因素,总结出一些常见的影响加工精度的因素,从而可以有针对性地制定提高加工精度的措施.     

蓖齿数控加工工艺研究

采用传统的加工方法加工篦齿,质量难保证,加工中容易因为小小的失误而引起报废。为了提高加工合格率,采用数控加工方法加工篦齿,加工出的产品符合要求,解决了普通加工带来的一系列问题。     

基于MasterCAM的曲面五轴数控加工方法误差的补偿技术

介绍了基于MasterCAM的自由曲面五轴加工的加工方法误差分析,并分析了它的影响因素.对自由曲面五轴加工的加工方法误差建立了数学模型,并研究了基于MasterCAM对加工方法误差进行补偿的方法与技巧.     

高速加工的CAM技术与模具加工

论述了高速加工的特点及技术要求，给出了高速加工的实现方法－基于材料贸量的加工。指出贸量加工不仅是实现高速加工的有效方法，而且是智能加工的技术基础。     

大型家用医疗仪器的外壳模具加工

介绍了大型家用医疗仪器外壳模具的加工方法（基于PowerMILL软件）,主要从加工流程、方案的分析确定、CAM设计方法 3个方面具体介绍。通过本次课题的研究和论述,找出大型外观模具加工时缩短模具加工周期,提高表面加工精度的加工方法,为今后我司承接模具加工奠定基础。     

Ion beam, focused ion beam, and plasma discharge machining

Non-conventional methods of machining are used for many engineering applications where the traditional processes fail to be cost-effective. Such processes include Ion Beam Machining (IBM), focused ion beam (FIB) machining and plasma discharge machining. The mechanisms of material removal and associated hardware and software developed for industrial applications of these fascinating electro-physical and chemical machining processes are reviewed together with the latest research findings.     

Compensation for machining defects due to spindle dilatation

Defects are a common occurrence in industry when it comes to prolonged machining tasks (machining moulds, series of work-pieces, etc.). The relatively long machining time is generally what gives significant value added to the work-piece. We therefore need to avoid having to produce test work-pieces as much as possible [NC Machines, Hermès Paris (1997)]. This article considers dispersions introduced by dilatation of the spindle during machining on NC machine tools. Such dispersions are obviously prejudicial to obtaining accurate dimensions along the Z-axis of the machine. Firstly, we introduce the context of the study and the problem we had to confront. Secondly, the experimental study enabled us to highlight those parameters having an influence and quantify defects. By expressing dilatation and relaxation in the form of an equation, we were then able to calculate defects at a given instant. This enabled us to generate an algorithm for processing of the N.C. program so we could correct errors by compensating for defects during machining. We completed the study by machining a series of work-pieces using the programme integrating compensation for dilatation so as to validate the approach.     

Pro／E软件在国产四坐标叶片加工中心上的应用

分析了四坐标叶片加工中心的硬件和软件相结合所出现的问题，解决了由于四坐标自身缺陷而导致的加工问题，用Pro/E软件与国产四坐标加工中心配合，从加工方案、机床设置、刀具等方面介绍保证其加工精度的方法和措施。     

飞机铝合金薄壁件的加工质量研究

在薄壁件切削加工过程中的加工变形和良品率低等问题成为了影响零件的加工精度和生产率的主要因素。因此,研究薄壁件加工中变形误差较大和良品率低等问题在理论研究和实际应用中都具有重大意义。对于铝合金薄壁件主要采用实验研究和限元分析相结合的方法,分析数控加工中薄壁件加工质量的主要影响因素,并论述了加工过程中,从加工工艺方案、装夹方案、刀具的选择和走刀路线等方面控制薄壁件的变形、加强加工过程中其刚度的具体改进措施,以提高薄壁件加工效率和质量。     

基于VERICUT多轴联动数控机床仿真加工效果对比与研究

加工仿真是虚拟制造的核心技术之一,为产品的可制造性提供关键数据,介绍利用VERICUT建立机床仿真模型的方法及过程,同时建立三、四和五轴联动数控机床模型,并对其加工效果进行比较,总结各数控机床的加工特点,为数控机床的选用和研究提供参考.     

Innovative Machine Kinematics for Combined Handling and Machining of Three-Dimensional Curved Lightweight Extrusion Structures

The importance of rigid and self supporting space frame structures for the automotive and aerospace industry continually increases. To meet the market requirements for a flexible and competitive small batch production, innovative machine concepts must be investigated. By integrating handling and machining capabilities into one machine structure, redundant degrees of freedom can be reduced and a former idle economic potential can be made use of.This paper introduces a systematic approach to reveal synergetic potentials that emerge by integrating two different fields of function, the handling and the machining. Therewith a matrix with technical solutions for a combination of handling and machining is generated. These solutions are the base for new machine concepts that fulfill both tasks with a minimal number of machine axes. A detailed model of an innovative machine concept is presented that allows a flexible and cost-efficient production of three-dimensional curved extrusions.     

Capability Profile of Hard Cutting and Grinding Processes

This keynote paper aims at matching the supply of research results with the industrial demands in hard cutting and grinding. The capability profiles of the processes are characterised and several manufacturing solutions are discussed. The comparison of hard cutting and grinding operations is carried out with regard to certain evaluation criteria based on the functionality of the machined workpiece itself, discussed at different levels, and the process economical efficiency. The basis for a roadmap of future development of hard machining technology is provided, e. g. the main technological developments associated with multi-processing hard machining concepts are given detailed consideration.     

Calculation of optimum cutting parameters based on minimum energy footprint

Environmental sustainability in machining requires that the energy and carbon footprint of machined products be optimised. The original contribution in this paper is that a minimum energy criterion recently proposed by the authors is exploited in the development and implementation of a methodology for selection of optimum cutting conditions. The energy saving impact of the new methodology was quantified by comparing to traditional practice. The synergy between minimum cost and minimum energy solutions was also explored. This timely research illustrates how the energy intensity and energy cost of a machined component can be minimised and hence reducing carbon dioxide emissions.     

Titanium machining with new plasma boronized cutting tools

Titanium is a commonly used material in various critical applications such as aerospace and biomedical applications. In this article, for the first time in the literature, development and implementation of a novel plasma boronizing process on Tungsten Carbide (WC) cutting tools is introduced. Plasma boronizing on WC tools is performed with gas combination of 10% BF₃, 40% Argon and 50% H₂ at different temperatures and durations. Performance enhancements of plasma boronized WC tools on Titanium (Ti-6Al-4V) machining are investigated under various cutting conditions. It is found that new plasma boronizing of WC is a very cost effective solution for significantly increasing tool life in Titanium machining.     

Velocity effects in metal forming and machining processes

Velocity is probably the most important parameter in manufacturing, influencing performance, cost, productivity, energy and resources efficiency as well as safety and environmental issues. This paper presents basic phenomena as well as other important effects which are linked to velocity as a process parameter. In addition, applications, for example superplastic forming or high speed cutting, which have been founded on uncommon process velocities are discussed in the context of technological developments which have taken place over the past several years.