VB6．0下长圆形级进模排样智能化的研究

总结了长圆形级进模排样图形设计方案，综合利用VB6．0软件具有面向未来、智能化轻松设计环境的特色，借助VB语言编程，输入长圆形相关参数后，自动生成级进模复杂排样图形，实现了长圆形件级进模排样图形设计的智能化。     

基于.NET的PDM系统图档管理模块的研究与应用

研究了应用新的面向对象语言VB．NET编程，在．NET编程环境中利用COM组件引入AutoCAD对象库，来实现PDM系统与AutoCAD系统的通信；探讨了在PDM系统中采用新的数据访问技术ADO．NET实现与SQLServer数据库的链接；提出了应用SQL Server 2000数据库采实现用数据库的信息绘制AutoCAD图形和从已有的图形中提取信息并录入数据库进行管理。COM组件的独立性、易用性和．NET平台的良好的异构语言编程环境，是开发PDM系统图档管理模块的一种非常适用的方法。     

通用机器人离线编程仿真平台设计

针对国内机器人离线编程仿真平台支持语言范围小，机器人控制功能不完善等问题设计出一套可以支持多种机器人编程语言与机器人结构的通用机器人离线编程仿真平台架构。基于模块化的思想，将该系统划分为两大主要模块，分别是用于解析机器人语言代码的语言解析模块与用于控制与模拟机器人运动的机器人仿真模块。基于语言解析模块识别机器人编程语言代码，并将机器人的程序语言代码解析为用于控制机器人运动的指令数据。基于机器人仿真模块实现机器人正向控制、逆向控制、轨迹规划与三维图形绘制。最后利用Qt为平台开发基础框架，实现代码的编辑，嵌入Bullet物理引擎构造机器人的相关参数，嵌入OpenScenceGraph三维图形引擎将物理场景中的信息以图形的方式绘制在Qt提供的显示界面上，并以一段Rapid语言代码与一种通用的六轴机器人为实验对象验证了平台的基本功能。实验结果表明，该平台能够准确的将语言代码转换为指令数据，并能控制机器人进行相应的轨迹运动，满足机器人离线编程需求。     

注射模零件三维参数化图库的开发

依据本文制订的注射模零件分类编码系统，将注射模零件按照特征码住法进行编码分类。选用JAVA语言以及Pro／E提供的开发接口J_Link作为开发工具，结合Pro／E软件自带的族表(Family Table)能，应用作图法与编程法，开发了以Pro／E为平台的注射模零件三维参数化图库。图库可以根据用户选择的参数自动生成相应三维图形。     

电火花线切割加工中实体数据格式的程序转换

针对电火花线切割编程系统绘制、编辑复杂曲线图形、文字功能差以及数据文件兼容功能不强的弱点，本文提出一种综合解决方案。利用AutoCAD强大的图形能力，基于对其图形实体数据表的分析，对AutoLISP程序提取实体数据，并自动转换成线切割自动编程系统所需的数据文件。该方法可使电火花线切割系统完成复杂图形、字体及具有尖角造型实体的加工，实践证明有较大的实用意义。     

基于Pro/E和MasterCAM的门铃面板数控加工

阐述了用Pro/E软件进行门铃面板模具设计,然后将图形数据转换到MasterCAM软件中进行数控编程的基本方法,重点论述了门铃面板凸、凹模加工工艺方案的合理性。     

多凸模冲裁压力中心的计算机辅助设计

叙述了利用通用绘图软件ＡｕｔｏＣＡＤ１１．０绘图后产生ＤＸＦ图形交换文件,用Ｃ（或Ｂａｓｉｃ）语言编程从ＤＸＦ图形交换文件中提取图形实体信息,进行多凸模冲裁压力中心的计算机辅助设计方法,该方法对建立冲模ＣＡＤ／ＣＡＭ系统具有重要的意义。     

基于面向对象的石材异型制品加工设备图形编程系统

通过分析石材异型制品的几何形状特征，设计了组成石材异型制品异型面的基本图形元素，应用面向对象的技术方法开发了针对数控石材加工设备的图形编程系统，解决了各图形元素之间的连接关系判断以及图形、数据信息处理等问题，以图形编程方式快速准确的生成数控代码。     

镶块模设计复合交互式输入法浅析

介绍了一种用于镶块模 Ｃ Ａ Ｄ 系统设计的图形输入方法。这种方法把图形软件和高级语言逻辑结合，大大简化了镶块模 Ｃ Ａ Ｄ 系统设计中的图形输入。其系统信息的保留和传递，有利于系统设计的后置处理。在实际应用中取得了较好的效果。     

用打印机绘制检验图形

校验线切割加工程序是否正确一直是个难题，一般来说，可以切割一块样板来校验程序。但对于单件小批的线切割加工来说，这是个很大的浪费。较好的一种办法是，将编程应用到的图形元素转换成图形，然后直接检验图形来判断程序是否正确。但由于绘图机价格昂贵，大多数厂家都不具备。我们使用一个ＶＢ３．０编制出的绘图式编程软件，在编制线切割程序的同时，还能把绘制完成的图形用打印机绘出，用以校验程序，基本上满足了检验程序的要求。（１）坐标系设定ＶＢ语言中，打印机的最左端和最上端设为原点０，然后以左为负，以右为正，以上为负，…     

Effects of Post-weld Heat Treatment on Microstructure,Mechanical Properties and the Role of Weld Reinforcement in 2219 Aluminum Alloy TIG-Welded Joints

In as-welded state, each region of 2219 aluminum alloy TIG-welded joint shows diff erent microstructure and microhardness due to the diff erent welding heat cycles and the resulting evolution of second phases. After the post-weld heat treatment, both the amount and the size of the eutectic structure or θ phases decreased. Correspondingly, both the Cu content in α-Al matrix and the microhardness increased to a similar level in each region of the joint, and the tensile strength of the entire joint was greatly improved. Post-weld heat treatment played the role of solid solution strengthening and aging strengthening. After the post-weld heat treatment, the weld performance became similar to other regions, but weld reinforcements lost their reinforcing eff ect on the weld and their existence was more of an adverse eff ect. The joint without weld reinforcements after the post-weld heat treatment had the optimal tensile properties, and the specimens randomly crack in the weld zone.     

冲压圆点连接机理初探

对冲压圆点连接的机理和圆点处的金相组织进行了分析。冲压圆点连接可分为4个阶段 ,即板料初压入阶段、冲压圆点成形初期阶段、冲压圆点形成阶段、保压阶段。由于被连接的板料在冲压连接圆点处受挤压 ,所以在材料的连接处产生压应力 ,提高了连接的抗疲劳强度。此外 ,对冲压圆点连接的特点、应用范围及影响因素进行了论述     

Numerical Simulation of the Thermo-Mechanical Process for Beam Blank Continuous Casting

The aim of this study was to simulate the solidification process of beam blank continuous casting, and then find the reasons for the typical defects of the beam blank. A two-dimensional transient coupled finite element model has been developed to compute the temperature and stress profile in beam blank continuous casting. The enthalpy method was used in the heat conduction equation. The thermo-mechanical property in the mushy zone was taken into consideration in this calculation. It is shown that at the mold exit the thickness of the shell had its maximum value at the flange tip and its minimum value at the fillet. The temperature had a great fluctuation on the surface of the beam blank in the secondary cooling zone. At the unbending point, the surface temperature of the web was in the brittleness temperature range under the present condition. To ensure the quality, it is necessary to weaken the intensity of secondary cooling. At the mold exit the equivalent stress and strain have higher values at the flange tip and at the web. From the spray 1 to the unbending point, the maximum values of stress and strain gradually moved to the internal section of the flange tip and the web. However, whenever, there were bigger stress and strain values near the flange tip and the web than in the other parts, it must be very easy to generate cracks at those positions. Now, online verification of this simulation has been developed, which has proved to be very useful and efficient to instruct the practical production of beam blank continuous casting.     

Simulation of 3-D Deformation and Material Flow During Roll Forging Process Using System of Oval-Round Groove

Basing on the analysis of the traits of the roll forging process, a system-model of computer simulation has been established. Three-dimensional rigid-plastic FEM has been used for the simulation of the deformation process in the oval and round pass rolling, including the entering, rolling, and separating stages. The analysis was conducted using the Deform-3D ver.5.0 code. The important information concerned with the deformation area characteristic, material flow, and velocity field has been presented. Otherwise,the location of the neutral plane in the deformation area was shown clearly.     

Quantitative Analysis of the Crystallographic Orientation Relationship Between the Martensite and Austenite in Quenching–Partitioning–Tempering Steels

The orientation relationships(ORs)between the martensite and the retained austenite in low-and medium-carbon steels after quenching–partitioning–tempering process were studied in this work.The ORs in the studied steels are identified by selected-area electron diffraction(SAED)as either K–S or N–W ORs.Meanwhile,the ORs were also studied based on numerical fitting of electron backscatter diffraction data method suggested by Miyamoto.The simulated K–S and N–W ORs in the low-index directions generally do not well coincide with the experimental pole figure,which may be attributed to both the orientation spread from the ideal variant orientations and high symmetry of the low-index directions.However,the simulated results coincide well with experimental pole figures in the high-index directions{123}_(bcc).A modified method with simplicity based on Miyamoto’s work was proposed.The results indicate that the ORs determined by modified method are similar to those determined by Miyamoto’method,that is,the OR is near K–S OR for the low-carbon Q–P–T steel,and with the increase of carbon content,the OR is closer to N–W OR in medium-carbon Q–P–T steel.     

Structural Optimization of Electromagnetic Swirling Flow in Nozzle of Slab Continuous Casting

During the slab continuous casting process, the flow field of molten steel in the mold plays a decisive role in the quality of the slab. In this paper, electromagnetic swirling flow in nozzle technology is proposed to control the flow field in mold.This technology can drive molten steel to rotate inside the submerged entry nozzle by electromagnetic force, thereby controlling the flow field. This research shows that it can reduce the impact of molten steel on the bottom of nozzle and partly reduce the negative pressure at the upper part of nozzle outlet which is even eliminated by optimizing the structure and angle of nozzle. The area of heat flux of the mold wall becomes larger, and the crest value of heat flux gets lower than that without swirling in nozzle and any nozzle optimization. The meniscus fluctuates smoothly, and the flow velocity at the top surface is within a reasonable range. The temperature field distribution in the mold is uniform which was beneficial to the growth of equiaxed crystal and decreased element segregation.     

RESEARCH ON THE FORMATION MECHANISM OF INTERNAL CRACK IN THE CONTINUOUS CASTING SLAB

In view of the periodic bending deformation of solid-liquid interface in the solidification process for continuous casting slab, the variation of temperature gradient and dendritic spacing in the front edge of the solid-liquid interface, and the nucleation and propagation process of crack were studied. It is shown that the bending deformation of the interface results in the temperature field change in the front edge of solid-liquid interface, and the occurrence of temperature gradient along drawing direction results in the growth of secondary dendrites. The initial crack formed during the middle and final stage of solidification may extend to the surface of the casting slab and become an internal crack. The results of the theoretical analysis are basically in agreement with that of the experiment.     

A CUMULATIVE FATIGUE DAMAGE RULE UNDER THE ALTERNATIVE OF CORROSION OR CYCLIC LOADING

Fatigue damage increases with the applied loading cycles in a cumulative manner and the material deteriorates with the corrosion time. A cumulative fatigue damage rule under the alternative of corrosion or cyclic loading was proposed. The specimens of aluminum alloy LY12-CZ soaked in corrosive liquid for different times were tested under the constant amplitude cyclic loading to obtain S-N curves. The test was carried out to verify the proposed cumulative fatigue damage rule under the different combinations among corrosion time, loading level, and the cycle numbers. It was shown that the predicted residual fatigue lives showed a good agreement with the experimental results and the proposed rule was simple and can be easily adopted.     

FeSO4水溶液超薄液层电沉积物的形貌选择及其磁性研究

利用FeSO4水溶液进行超薄液层电沉积实验研究,重点考察沉积物的形貌选择及其磁性特征。在较大的沉积电流条件下,可获得纳米量级厚度的纤维状电沉积物;而在较小的沉积电流条件下,获得的薄膜状电沉积物的厚度达到了亚微米量级。在此基础上,利用磁力显微镜检测具有不同形貌的Fe的电沉积物经自发磁化以及经不同外加恒稳磁场磁化后所形成的表面杂散磁场分布,以此推断磁畴在样品中的分布规律。最后,利用交变梯度磁强计检测所得电沉积物的磁性特征,所得实验结果表明样品的易磁化轴位于电沉积物生长所在平面,不同方向饱和磁化强度的大小取决于样品的生长方向、几何尺寸及其形貌特征。     

Analysis of solid-liquid fluid dynamics about the characteristics of electrotyping diamond-nickel composite film

In this paper,super-thin free-standing diamond grains-nickel composite film in large area were prepared by using electrotyping method,which were used to make super-thin cutting blades.Scanning electron microscope(SEM) were used to analyse the characteristics of the film.It was found that the agitation velocity and the place of impeller strongly affected the content and uniformity of diamond grains in deposited composite film when the other parameters were the same.The best film was deposited when agitation velocity was 180-220 r/m and the impeller was placed in the lower part of the solution.The obliquity of cathode strongly affected the content of diamond grains in the film,and the content reached maximum when the obliquity was kept at 45 degree.The hanging orientation of cathode strongly affected the uniformity of the thickness of the film,and uniform films were deposited when cathode was intermissively circumrotated by 90 degree in the plane itself during deposition.The fluid field in solid-liquid stirred electrolytic solution was analysed by using Computational Fluid Dynamics(CFD).And the influences of agitation velocity, the place of impeller and the obliquity of cathode on the content of diamond grains in the film were explained.With Euler-Lagrange model,the just-suspended speed of impeller in solid-liquid stirred electrolytic tank was predicted by using Zwietering formula,the predicted speed was and it was consistent with experimental result.