耐酸泵计算机辅助工艺规程设计—DTN·CAPP系统

DTN·CAPP系统是对耐酸泵的关键零件——过流零件(包括:泵体、泵盖、叶轮)进行计算机辅助工艺规程设计的一整套软件系统,由大连铁道学院设计完成。该系统以成组技术(GT)为基础,通过输入零件的有关信息,由计算机自动生成GT代码,并通过筛选矩阵,自动分类归组,然后由系统进行各种逻辑判断、推理、决策,自动生成包括工序、工步、设备、夹具、辅具、刀具、量具、切削参数、工时定额及工序图等内容详细的工艺过程卡片和关键工序的工序卡片。     

铁道货车冲压件计算机辅助工艺文件设计系统（QCCYCAPP）的开发研究

本文综述了开发铁道货车冲压件计算机辅助工艺规程设计系统的理论和方法,讨论了建立冲压零件编码系统零件分类和系统程序设计的方法和技术.在此基础上建立了检索式铁道货车冲压件 CAPP 系统(QCCYCAPP).该系统综合运用了 CAPP、CAD、DBF 技术,将零件的工艺分析、工艺规程设计和工艺卡片图表编制等工作有机地溶为一体,可提高工艺文件编制的质量和效率,促进工艺工作的标准化和规范化,研制的软件系统具有功能全面,实用性强,操作灵活方便,易于学习掌握等特点.     

铁路货车冲压工艺卡片计算机辅助绘图方法的研究

工艺卡片的设计与绘制是机械加工工艺设计过程中不可缺少的一部分,而其绘图工作量约占整个设计周期的60%～80%的时间.为加速产品的更新换代,缩短设计周期,增加市场的竞争能力,使工艺师有充足的时间去做具有创造性的工作,采用计算机辅助工艺规程设计(简称 CAPP)已成为目前广大工艺设计人员的迫切要求。目前,国内对 CAPP 的研究大多数着眼于零件的分类与编码、计算机辅助工序的编排,而把工序编排与绘图结合起来的研究还很少.为此,我们以齐齐哈尔车辆工厂的铁路货车冲压     

捷德公司荣获ICMA组织依兰卡片设计大赛三项大奖

日前，捷德公司在ICMA举办的依兰卡片设计评选活动中，一举拿下了最佳安全金融卡设计、最佳其它安全卡片设计以及现场评选评委选择三项大奖。其获奖作品分别是：中国光大银行的新浪音乐频道联名信用卡、南京公共事业IC卡有限公司的牛年生肖晶灵卡以及招商银行MTV联名信用卡。捷德公司的此次获奖再一次印证了在卡片设计和制作工艺方面的创新水平。     

铁道货车冲压件计算机辅助工艺设计系统(QCCY·CAPP)

大连铁道学院和铁道部齐齐哈尔车辆工厂合作研制开发的铁道货车冲压件计算机辅助工艺设计系统 QCCY·CAPP,可用于铁道车辆型钢、板材零件的冲压工艺文件的计算机辅助设计及有关管理工作.从而实现了利用计算机对冲压件进行工艺分析,编码分类,工序、设备、工装的计算机选择,以及工件图的计算机辅助绘制和工艺卡片的自动生成等工作,并具有弯曲件展开长度的快速计算,工艺信息检索、查询等功能.     

细长轴类零件的柔性夹具设计

对细长轴类零件的工艺进行了分析,设计了在立式加工中心上加工细长轴类零件的柔性夹具。通过本夹具可以批量安装细长轴类零件,以实现铣、钻、扩、铰、镗等工艺过程。应用表明本设计可以降低成本、提高效率、提升质量。     

基于PFA的派生式简易CAPP系统设计

首先分析了派生式CAPP系统设计采用生产流程分析法(PFA)对零件分组的必要性;详细介绍了基于PFA的派生式简易CAPP系统的设计过程,包括对零件编码、分组、建立特征矩阵及工艺文件等.使用该系统为每个零件编制工艺规程时,只需对标准工艺规程作少量修改,同时还可得到加工所用的机床组,极大地提高了工艺部门的工作效率.     

高层次工艺规划前置处理接口技术

根据并行工程的基本原理,提出了一种基于完整设计信息的高层次工艺规划原型系统.该原型系统以完整的三维设计模型为信息源,因此需开发完善的前置信息处理接口,以获取有效的设计信息并将其转化为制造时工艺分析能直接使用的制造信息.前置处理接口中的设计模型信息提取接口用三维CAD软件的二次开发技术提取完整的零件结构信息;制造特征映射接口用三维特征识别和映射技术将提取的设计信息转换为制造模型.两个接口程序集成后,可获得零件的制造特征树和制造模型信息库,有效地支持HLPP.     

基于Pro/E的齿轮泵运动仿真与装配动画研究

通过零件三维模型的生成及运动仿真,可大大减少设计周期,通过装配动画的设计和制作,可提高装配工艺编制效率,并指导工人装配,从而提高产品制造质量。本文以齿轮泵为例,介绍了Pro/E软件中的运动仿真和装配动画的操作思路和具体方法。     

外热式真空炉温度控制系统及软件设计

论述了外热式真空炉温度控制模型，阐明了采用动态控制方法，可严格保证零件的工艺要求，尤其是升，降温段的速率要求，还详细讨论了其微机控制的软件的设计，该温软件主要由管理模块，２ｓ中断服务程序和１０ｍｓ中断服务程序３部分组成。     

Modelling of high speed gas quenching

1ntroductionGaswimpfobe,usuallynitrOgen,mandheiumatposuresOfuPtO60barhasbousedinvacmbosfOrSendywtanditScharWshcsforbds-ofCOInNarewe1knOWUIl].More~theuseofgasq-aPPliedtOs~orsinglelayereOfCOmwtthawereheandindsvacuumorCOnwtalatmOSPherbohasboPrOpond(2l.TOathaatetheedtOCOOtheboacestruCtUrasweIIastheCOIntwIkeSechquesOboinvolvethetrareferOftheNttobeqMtoa~allydeaignedcoklchfortsl.6as~of~peinndsngmaybosoaS~the-ofbo'bds-Oha'pesstwfOr'juSb~'manwt.Unlikliquldbased~antS,gaswiiscleannO…     

Computer Prediction on Stress Distribution During Laser Quenching

IntroductionInprocessofindustry,theproblemscoupIedwiththermaIandfOrceareusuaIIymet.LaserqueIlchinginvolvingphasetransformationisoneofthem.HowtosetupafitmatheInatica1modeltosimulatetl1elaserquenchingprocessandhowtocalculateandanalyzenumericallythestresgdistributionarefolIowedwithinterestbymanyresearchersIl'2'3J.Thoseeffol'tsareimportanttooPtilnizethetechnologyparametersandprovideareliablebasisforimprovingthesyntheticallymechanicspropertiesandtheuseagesofmaterials.Alongwithdevelopmentofcomp…     

实时测温技术在调质热处理中的应用

热处理工艺参数对金属部件的组织和力学性能有显著的影响,以盘形工件淬火热处理为例,采用实时测温技术准确监控淬火热处理过程中工件的加热和冷却的温度-时间历程,并结合随炉试样的组织和力学性能,科学制定出热处理工艺规范,控制热处理工艺过程,稳定热处理质量,使工件性能满足了使用要求.     

Computer modeling and validations of steel gear heat treatment processes using commercial software DANTE

The heat treatment process of a gear made of AISI 9310 carburized steel is modeled using the commercial heat treatment simulation software DANTE. Both carburization and quenching processes affect the residual stress distribution and distortion of heat-treated parts, which are important to service quality and fatigue life. DANTE/VCARB is used to design the boost/diffuse schedule of a vacuum carburization process. Oil quenching is modeled following the vacuum carburization process. Thermal gradient and phase transformation are two main sources of distortion and residual stresses in quenched parts. The relation of the carbon distribution, thermal gradient, and phase transformations during quenching is studied through the gear modeling example. Because of geometry, the residual stress distribution after quenching is non-uniform along the gear surface. In general, the root fillet has higher residual compression than either the root or tooth face locations after traditional oil quenching of carburized gears. The predicted residual stresses from the oil quenching model are imported into a single tooth fatigue bending model. The gear stresses under bending load indicate the possible cracking locations during the bending fatigue test. The importance of heat treatment residual stresses during gear design is pointed out, and it is commonly ignored in the gear design and manufacturing industry.     

Application of the Controllable Quenching Technology to the Quenching and tempering Workpieces

IntroductionThequenchingandtemperingistheprimaryprocessinheattreating.HoweveY,itismoredifficulttoensurethecomprehensivemechanicalpropertiesofpartsfortheseveraleffectivefactorsinquenching,whichforexamplearechemicalcompositionofsteel,thecross-sectionofpan,quenchant,quenchseveritydeterminedbythecirculationrateandtemperatureofquenchant.Therefore,thecontrollablequenchingbecomesakeytechnique.S.WHan,etc[l1developedaimmersion-hmequenchingsystemtogetthecontrollableagitation,whichprovidesmaximumcoo1in…     

Application of the computer-aided quenching technology on the connecting bar of 42CrMo4

In order to obtain the desired mechanical properties of connecting bar after quenching and tempering, and reduce the cracking tendency and distortion, a program of controllable quenching was established. Furthermore, a computer-aided quenching (CAQ) system was developed. The applications show satisfactory results.     

弹簧夹头体开裂分析

文章介绍了两种规格的弹簧夹头体在装配调试过程中批量性地发生突然断裂,通过对其进行宏观断口及表面检查、化学成份分析、硬度检测、金相检查等,分析出产生断裂的原因是由于弹簧夹头体存在淬火裂纹,使受力最大的头锥部与圆柱部的过渡圆弧处产生应力集中而导致脆性断裂。产生淬火裂纹的原因一是由于淬火温度过高,引起组织过热,二是淬火冷却过快。     

Finite Element Method Analysis of Stress Field Considering Thermal Coupled Force During Laser Process

IntroductionLaserphasetransformationhardeningisanewtechnologyduringwhichlaserheatresourceactsdirectlyonsurfaceofmaterialandcompositionscharacteristicofmaterialischanged.Thetechnologyproce8sesacharacterofrapidheatvelocity,highheattempelatureandquickcoolingspeed(l0'col0'aC/s).Thecompositionandcharacteristicofmaterialvariedwithvariousinnertemperaturewillleadtothermalresidualstress.Itiswellknownthattheresidualstressaffectssignificantlyoncharacteristicofmaterial,suchasimProvingstrengthoffatigUere…     

Research on mechanical properties of 22MnB5 steel quenched in a steel die

22MnB5 is one of the most typical hot stamping boron steels. In order to study the effect of austenitizing temperature and holding time on the mechanical properties of hot stamping boron steel 22MnB5, a series of quenching process are done. The tensile strength and hardness of 22MnB5 samples are measured. The results show that 22MnB5 has a good quenching performance, and the tensile strength and hardness of samples quenched in a water-cooled steel die are similar to those of water quenching. The higher tensile strength and HRC hardness are achieved when austenitizing at temperatures of 880–910 °C. Holding at 910 °C for 5 min and then quenching gives rise to a better combination of tensile strength, hardness and ductility.     

Sensitivity analysis of thermal properties on numerical simulation results of quenching process

A three-factor three-level orthogonal test project has been designed based on the numerical simulation of a Jominy quenching process. Then the data scattering effects of thermal conductivity and enthalpy of tested steel, as well as the heat exchange coefficients of the cooling media, on the results have been studied. The results can be used as a reference for choosing the input thermal parameter in finite element simulation of quenching, and for evaluating the simulation results.