基于钣金FMS的成组技术应用

应用成组技术（ＧＴ）的原理分析了电器仪表行业中零件的设计和工艺特点，研制出一种适用于板金柔性加工系统（ＦＭＳ）的冲压零件的分类编码系统，并对其信息成方法的进行研究，同时开发出相应的自动编码，自动分组和优化作业计划的计算机软件包。     

异形零件的拉伸成形工艺及模具

异形零件的拉伸成形工艺及模具广东中山市燃气具工业集团公司模具厂（广东中山５２８４０３）卢小鹏在板金成形零件中，一般将既不象圆筒形也不似矩形的拉伸零件称为异形零件。由于异形零件在拉伸时材料变形复杂，不能进行较准确的工艺计算，常常缺乏可供参考的技术资料，...     

高硅氧玻璃纤维过滤网及其在铸造生产中的应用

高硅氧玻璃纤维过滤网及其在铸造生产中的应用秦佑镇（江苏南京市：２１００１２江苏省机械研究设计院）王鹤田（陕西兴平县：７１３１００陕西玻璃纤维总厂）主题词：过滤网，液体金属净化铸件质量在各类工业与民用产品中相当重要，铸造零件在各种机械中所占重量比为：金...     

任意弯管展开图及其排版的电绘

任意弯管展开图及其排版的电绘２４１０００芜湖市安徽机电学院金健上海宝冶建筑公司结构厂沈宾钢结构弯管零件的制作，一般都是先根据零件的设计图样画出其展开图，在计算出每次下料需剪裁的弯管数总的展开面积（考虑加工余量）后，再据此选用合适的钢板，然后经过放样、...     

基于特征和O-O分类的CBR重用设计系统

零件分类是在企业中实施成组技术的关键。本文针对传统零件分类编码方法的不足，基于易理解、可重用和可扩充的考虑，把面向对象方法和特征技术运用到零件分类中去，构造了一种新颖的分类模型，并从实际出发，将其运用到齿轮减速箱CBR设计系统中，该系统具有较高的柔性和开放性，可实现零件（部件）级上的设计重用。     

冲模CAD系统中零件图形的自动输入

在冲模ＣＡＤ系统中，冲裁零件的图形输入是关键的一步。本文介绍了从ＤＸＦ文件（图形交换文件）中抽取信息，自动生成冲裁零件几何模型的一种方法，有效地解决了零件图形的自动输入问题。     

计算机辅助工艺路线编制系统的开发与应用

Ｓ１－ＣＡＰＲＰ系统是计算机辅助工艺路线编制专家系统，在该系统中将先进的专家理论和方法运用于零件工艺路线编制的具体工作中，解决了零部件专业化和成组加工制造环境下零件工艺路线编制的正确性和一致性问题。该系统能够快速准确地自动生成零件工艺路线，为进一上开发计算机辅助工艺规程设计（ＣＡＰＰ）的研究奠定了基础。本文详细介绍了应用专家系统理论和方法，开发计算机辅助工艺路线编制系统的基本思想和方法。     

半固态Al-7%Si合金二次加热及成形试验

采用电阻炉加热的方法对机械搅拌法制备的半固态Al-7％Si合金进行了二次加热及成形试验，观察了显微组织的变化；通过电阻炉加热，分别用半固态模锻和液态模锻的方法成功地试制了法兰盘零件。初步探讨了搅拌工艺参数和液态模锻（半固态模锻）工艺参数的选择问题。     

彩枪零件模具结构的改进

１前言我公司东芝系列的４７cm、５４cm彩枪金属零件是１９９２年初开始试车生产，零件的成套模具大部分是引进日本的，其中边束阴极支架B３０６（J１）１零件的模具１１－１５－０１也是日本生产的模具之一。在生产中，我们发现边束阴极支架B３０６（J１）１零件与中束阴极支架B３０５（J１）零件比较，其形状大体相同，而且两种零件的尺寸精度也一致。但两种零件模具的结构有很大差别。其中B３０６（J１）１零件的模具１１－１５－０１比B３０５（J１）零件的模具１１－１４－０７结构复杂，且使用的材料比B３０５（J１）零件宽。这…     

离合器从动盘浮动铆合模

离合器从动盘浮动铆合模常德摩擦材料厂（湖南常德４１５７０１）马卫平１从动金总成铆接工艺分析在汽车离合器中，零件之间的联接大部分采用铆接法，铆接质量对产品的性能起着决定性的作用。图１为从动盘装配简图，该总成最后采用６个特殊铆钉连接，这６个铆钉的特殊性主...     

Development of ultra high performance concrete dies for sheet metal hydroforming

The paper concentrates on investigation results dealing with ultra high performance concrete (UHPC) dies for the use in sheet metal hydroforming. A special mixture of UHPC for these tools with its mechanical properties and its manufacturing is presented. The developed UHPC features a compressive strength of approx. 250 MPa and a Young’s modulus of approx. 50 GPa. Applying internal pressure, the UHPC die (without confinement or reinforcement) failed between 80 and 96 MPa. The forming test proved a good shape accuracy of the sheet metal parts but revealed critical tribological conditions. Drawing foil and already formed sheet metal parts were tested successfully as interlayer and led to an appropriate material flow and surface quality of the sheet metal parts.     

Investigation of active-elastic blank holder systems for high-pressure forming of metal sheets

Hydroforming constitutes a subgroup of sheet metal forming processes utilizing a pressurized forming medium. Besides the hydroforming of hollow sections, the high-pressure forming (HPF) of metal sheets is demonstrably one innovative method for the production of complex sheet metal components and offers high potentials to improve the properties and qualities of sheet metal parts. This report describes investigations of a newly developed active-elastic blank holder technology, which is used for HPF of metal sheets. Unlike the use of semi-rigid blank holder systems, the active-elastic blank holder system shows improvements with respect to the material flow in the flange area and reduced sheet thinning in critical corner regions of the work-piece. In addition to numerical analysis concerning the development and design of the active-elastic blank holder, current experimental examinations will be presented. The focus is on a comparative evaluation of the simulation and production of rectangular metal parts, by using conventional semi-rigid tools and active-elastic tools.     

实用钣金展开CAD系统的开发技术与应用研究

在分析钣金展开计算和绘图方法的基础上，详细地讨论了实用钣金展开CAD的系统结构和开发方法。最后结合钣金展开应用实例。系统地说明利用几何数学计算法结合计算机辅助设计和AutoCAD系统的绘图环境，如何进行钣金件展开计算，自动生成钣金展开图和相应的展开计算数据文件。目前，该方法已经成功地用于开发钣金展开CAD系统。     

板料零件数控渐进成形工艺研究

板料零件数控渐进成形工艺是一种通过数字控制设备 ,采用预先编制好的控制程序逐点成形板料零件的柔性加工工艺。本文就板料零件数控渐进成形工艺的成形过程、变形机理、极限半顶角等方面进行了探讨。认为 ,板料零件数控渐进成形是使板料的厚度减薄 ,表面积增大 ,靠逐次的变形累积产生整体的变形。变形区厚度的变化与成形半顶角有关 ,其中 ,成形极限半顶角是数控渐进成形能否成功的关键 ,它不仅与材料有关 ,而且与板料厚度有关。     

多点压板成形技术及其板料冲压成形工艺

板料在冲压成形过程中常出现起皱现象,这是板料受压失稳的结果。论文提出一种新型的多点压板成形冲压技术,板料在冲压成形过程中,板料的上、下面受弹性压板力的约束,从而可以提升板料的失稳临界应力,减少板料的受压屈曲与起皱。同时研制一种可重构的杆系柔性成形模具,实施多点压板成形冲压工艺。试验表明,这种新型模具可以实施快速重构,同时可以有效地控制板料的起皱,特别适用于中小批量曲面板件的冲压成形加工。     

Experimental determination of yield loci for magnesium alloy AZ31 under biaxial tensile stress conditions at elevated temperatures

The finite element analysis (FEA) has become one of the most relevant and most important tools in fields of sheet metal forming for designing processes and dimensioning parts. However, reliability and quality of the numerical results strongly depend on the whole FE-model and especially on the modeling of the material behavior, which shows wide impact on calculated stresses and strains of sheet metal parts. Therefore, the experimental determination of characteristic material data concerning anisotropic and temperature-effects is essential. In this paper the influence of temperature on the yielding and the hardening behavior of the magnesium sheet metal alloy AZ31 are investigated for different uniaxial and biaxial stress conditions. For that purpose an experimental setup has been developed at the Chair of Manufacturing Technology (LFT) which enables biaxial tensile testing of sheet metal. Yield loci of AZ31 are determined as a function of temperature and they are based on solely measurement data of the forming process itself.     

板材零件局部体积成形技术研究

板材局部体积成形技术,或称为板材热冲锻成形技术,为近年来提出的一种板材零件成形方法,其特点是板材冲压成形时不但完成板材零件形状的成形,还兼有局部结构的体积成形,例如局部凸柱、凸台、凸筋等结构的成形,适合于成形镁合金、铝合金等金属的成形,尤其适于替代一些电子器件外壳的铸造加工产品。文章介绍了板材热冲锻成形技术的原理、主要工艺控制参数,并对镁合金盒形件的热冲锻成形过程进行了实验研究和计算机模拟分析。针对带有螺丝柱的典型AZ31B镁合金方盒件,通过实验和有限元模拟,研究了其热冲锻成形工艺。实验表明,在再结晶温度以上冲锻2mm或3mm厚的镁合金板材有很好的成形能力,盒形件的周边和内部凸柱都能同时成形。研究结果表明,合理的模具结构、摩擦润滑条件和加热温度等参数,可以获得侧壁高度均匀、凸柱高度合适、无吸孔和凸柱断裂等缺陷的工件。     

Numerical simulation of aluminum alloy ladder parts with viscous pressure forming

1　INTRODUCTIONTheeffectofstressstatesonaxisymmetricsheetformabilityhasbeenstudiedundertheconditionofsolidmetalpunchforming [14 ] ,andtheeffectofblankholderpressure (BHP) ,frictioncoefficientandpunchconfigurationonthestressstateshasbeenob tained .Becauseofthedisadvantagesofsolid punchforming ,newformingtechnologyisneededtoim provethestressstatesofthesheetinformingprocessandtomeettherequirementofforminglow plastici ty ,complexshapeparts .Viscouspressureforming(VPF)isarecentlydevelopedfle…     

Stud welding within sheet metal working tools

Sheet metal parts often have to be connected by fasteners. Within conventional process chains for the production of sheet metal parts, fasteners like bolts are mostly welded individually after the forming process and outside the working tool. This spatial separation of production steps requires complex handling operations and has negative impact upon the positioning accuracy of the fasteners. Every executable manufacturing step inside the sheet metal working tool shortens the process chain significantly. Furthermore, using a combined process the precision of position and orientation of fasteners improves. The challenges of integrating the welding process into the sheet metal working tool are some appropriate feeding technique, handling the emissions and associated pollutions of the tool as well as creating a dependable monitoring-system for the welding-process. Within the scope of a research project, a reliable technology for the integration of capacitor discharge (CD) stud welding with tip ignition was developed and tested. It complements existing solutions for integrated resistance welding processes. Due to its high-speed capability, low insertion of energy and only needed one-sided accessibility, this technique is particularly suitable for the integration in sheet metal working tools. A newly developed exhaustion-system is installed and tested for the first time by the CD arc stud welding process. The new technology produced top quality welding results along with high process stability and robustness in long-term tests.     

A servo motor driven multi-action press for sheet metal forming

The goal of the current study is to adapt a servo-motor driven multi-action press for forming of sheet metal parts under precise velocity control and variable blankholding force. The Engineering Research Center for Net Shape Manufacturing [ERC/NSM] has developed a computer controlled multi-action press with two independently driven punches for research in cold forming of complex parts, using physical modeling techniques. Recently, the same press was modified and upgraded for use in sheet metal forming. As a result of its special design and construction, this press is highly controllable and can perform a wide range of sheet metal forming processes. Tests were conducted in order to obtain the actual press characteristics. Axisymmetric deep drawing experiments were performed with 1100-O annealed aluminum material using all three actions of the press. In these preliminary experiments, the crucial role of blankholding force control on final product quality and drawability was established.