Effective tool design of three-rank form as precision removal-process of ITO thin-films

A new effective tool design of three-rank form of electroremoval was present using a precision recycle system offering faster performance in removing the indium-tin-oxide(ITO) thin-films on color filter surface of displays. Higher electric power is not required since the three-rank form tool is adopted as a feeding mode to reduce the response area. The low yield of ITO persists throughout the entire semiconductor production process. By establishing a recycle process of ultra-precise removal of the thin-film nanostructure, defective products in the optoelectronic semiconductors industry can be effectively recycled, decreasing both production costs and pollution. A 5th generation TFT-LCD was used. The design features of the removal processes for the thin-films and the tool design of three-rank form were of major interest. For the precision removal processes, a pulsed current can improve the effect of dreg discharge and contributes to the achievement of a fast workpiece (displays' color filter) feed rate, but raises the current rating. High flow velocity of the electrolyte with a high rotational speed of the tool electrodes elevates the ITO removal effect. A displays' color filter with a fast feed rate is combined with enough electric power to provide highly effective removal. A small thickness of the rank and a small arc angle of the negative-electrode correspond to a higher removal rate for ITO-film. An effective three-rank form negative-electrode provides larger discharge mobility and better removal effect. It only needs a short period of time to remove the ITO easily and cleanly.

TOOL DESIGN OF ELECTROCHEMICAL MACHINING WITH PASSIVATED ELECTROLYTE

Based on analysis of electrochemical machining ( ECM) process and application of finite ele- ment technique ( FET) , a method of tool design is presented which can be used in ECM with passivated electrolyte. As a result of specific treatment to boundary conditions, this method needs much less com- puting time and memory space. It has been shown that the theoretical results correspond well with the experimental ones .

Ultrasonic vibrating system design and tool analysis

The applications of ultrasonic vibrations for material removal processes exist predominantly in the area of vertical processing of hard and brittle materials. This is because the power generated by vertical vibrating oscillators generates the greatest direct penetration, in order to conduct material removal on workpieces by grains. However, for milling processes, vertical vibrating power has to be transformed into lateral (horizontal) vibration to produce the required horizontal cutting force. The objective of this study is to make use of ultrasonic lateral transformation theory to optimize processing efficiency, through the use of the finite element method for design and analysis of the milling tool. In addition, changes can be made to the existing vibrating system to generate best performance under consistent conditions, namely, using the same piezoelectric ceramics.

Precision Design for Machine Tool Based on Error Prediction

Digitization precision analysis is an important tool to ensure the design precision of machine tool currently. The correlative research about precision modeling and analysis mainly focuses on the geometry precision and motion precision of machine tool, and the forming motion precision of workpiece surface. For the machine tool with complex forming motion, there is not accurate corresponding relationship between the existing criterion on precision design and the machining precision of workpiece. Therefore, a design scheme on machine tool precision based on error prediction is proposed, which is divided into two-stage digitization precision analysis crucially. The first stage aims at the technology system to complete the precision distribution and inspection from the workpiece to various component parts of technology system and achieve the total output precision of machine tool under the specified machining precision; the second stage aims at the machine tool system to complete the precision distribution and inspection from the output precision of machine tool to the machine tool components. This article serves YK3610 gear hobber as the example to describe the error model of two systems and basic application method, and the practical cutting precision of this machine tool achieves to 5-4-4 grade. The proposed method can provide reliable guidance to the precision design of machine tool with complex forming motion.

ADAPTABLE DESIGN OF MACHINE TOOLS STRUCTURES

Adaptable design aims to extend the utilities of design and product. The specific methods are developed for practical applications of adaptable design in the design of mechanical structures, including adaptable platform, interface and module designs. Adaptable redesign problems are formulated as adaptable platform design under adaptability bound constraints. Analysis tools are then suggested for the implementation of the redesign of machine tool structures, including variation techniques based sensitivity analysis, similarity-based commonality analysis, performance improvement, and adaptability measures. The specific measure of adaptability for machine tool structures is measured through the quantification of the structural similarity and performance improvement gained from adaptable design. The method provides designers with an approach that brings adaptability into the design process, with considering the cost and benefits of such adaptability. The redesign of CNC spiral bevel gear cutting machine structures has been included to illustrate these concepts and methods.

DESIGN AND PROPERTIES OF A FUNCTIONALLY GRADIENT CERAMIC TOOL MATERIAL

Based on the analyses of the severity of cutting process as well as the failure mechanisms of ceramic tools, a model for designing functionally gradient ceramic tool materials with symmetrical distribution is presented, by which a Al 2O 3/(W,Ti)C ceramic tool material FG 2 was developed. Multi objective optimization method was employed in designing the compositional distribution of this ceramic tool material. The results of both continuous and intermittent cutting tests are indicative of the much better cutting behavior of the functionally gradient ceramic tool FG 2 than that of the common ceramic tool SG 4.

Design of Five-Axis Ultrasonic Assistant Compound Machine Tool

A compound machine tool was designed, which combined rotary ultrasonic assisted grinding, electrical discharge machining(EDM) and multi-axis milling. Experimental results indicated that its positioning accuracy was less than 5.6 μm and its repetitive positioning accuracy was less than 1.8 μm; the vibration amplitude of ultrasonic grinding system was uniform and stable, and the EDM system worked well and stably.A smooth surface of K9 optical glass component was achieved by the grinding method.

Dynamic Accuracy Design Method of Ultra-precision Machine Tool

Ultra-precision machine tool is the most important physical tool to machining the workpiece with the frequency domain error requirement, in the design process of which the dynamic accuracy design(DAD) is indispensable and the related research is rarely available. In light of above reasons, a DAD method of ultra-precision machine tool is proposed in this paper, which is based on the frequency domain error allocation.The basic procedure and enabling knowledge of the DAD method is introduced. The application case of DAD method in the ultra-precision flycutting machine tool for KDP crystal machining is described to show the procedure detailedly. In this case, the KDP workpiece surface has the requirements in four different spatial frequency bands, and the emphasis for this study is put on the middle-frequency band with the PSD specifications. The results of the application case basically show the feasibility of the proposed DAD method. The DAD method of ultra-precision machine tool can effectively minimize the technical risk and improve the machining reliability of the designed machine tool. This paper will play an important role in the design and manufacture of new ultra-precision machine tool.

Matrix Operations Design Tool for FPGA and VLSI Systems

Embedded systems used in real-time applications require low power, less area and high computation speed. For digital signal processing, image processing and communication applications, data are often received at a continuously high rate. The type of necessary arithmetic functions and matrix operations may vary greatly among different applications. The RTL-based design and verification of one or more of these functions could be time-consuming. Some High Level Synthesis tools reduce this design and verification time but may not be optimal or suitable for low power applications. The design tool proposed in this paper can improve the design time and reduce the verification process. The design tool offers a fast design and verification platform for important matrix operations. These operations range from simple addition to more complex matrix operations such as LU and QR factorizations. The proposed platform can improve design time by reducing verification cycle. This tool generates Verilog code and its testbench that can be realized in FPGA and VLSI systems. The designed system uses MATLAB-based verification and reporting.

Optimization and Process Design Tools for Estimation of Weekly Exposure to Air Pollution Integrating Travel Patterns during Pregnancy

A growing number of international studies have highlighted that ambient air pollution exposures are related to different health outcomes. To do so, researchers need to estimate exposure levels to air pollution throughout everyday life. In the literature, the most commonly used estimate is based on home address only or taking into account, in addition, the work address. However, several studies have shown the importance of daily mobility in the estimate of exposure to air pollutants. In this context, we developed an R procedure that estimates individual exposures combining home addresses, several important places, and itineraries of the principal mobility during a week. It supplies researchers a useful tool to calculate individual daily exposition to air pollutants weighting by the time spent at each of the most frequented locations (work, shopping, residential address, etc.) and while commuting. This task requires the efficient calculation of travel time matrices or the examination of multimodal transport routes. This procedure is freely available from the Equit’Area project website: (https://www.equitarea.org). This procedure is structured in three parts: the first part is to create a network, the second allows to estimate main itineraries of the daily mobility and the last one tries to reconstitute the level of air pollution exposure. One main advantage of the tool is that the procedure can be used with different spatial scales and for any air pollutant.

Evaluation of Thermal Effect of PCM Wallboards by Coupling Simplified Phase Change Model with Design Tool

A simplified PCM wallboard model is coupled to an existing design-oriented model of multi-zone buildings. Using a reference model and a basic simulation configuration, the accuracy of the resulting PCM wallboard-building thermal design tool is evaluated. A new performance indicator, called PCM utilization factor, is then proposed in order to estimate the thermal efficiency of using PCM wallboards in buildings. Using this PCM Utilization factor and a degrees-hours indicator, the ability of the PCM wallboard-building thermal design tool to evaluate the effect of PCM wallboards on heating loads and summer thermal comfort in the early design phase of a project is examined in two real case studies: a family house project and an existing office building. The user-friendliness of this design tool, and the short calculation times it leads to when performing a year-long simulation using a standard office computer, make it a well-adapted tool for sensibility studies or multi-criterion optimization for buildings that contain PCM wallboards.

Research on Visual Virtual Design Platform for NC Machine Tools

The fundamental ideas on building the collaborative design platform of virtual visualization for NC machine tools are introduced. The platform is based on the globally shared product model conforming to the STEP Standard,and used PDM system to integrate and encapsulate CAD/CAE and other application software for the product development. The platform also integrated the expert system of NC machine tools design,analysis and estimation. This expert system utilized fuzzy estimation principle to evaluate the design and simulation analysis results and make decisions. The platform provides the collaborative intelligent environment for the design of virtual NC machine tools prototype aiming at integrated product design team. It also supports the customized development of NC machine tools.

Structural Bionic Design of Machine Tool Structures

A structural bionic design process is systematically presented for lightweight mechanical structures. By mimicking biological excellent structural principles, the stiffening ribs of a machining table and a moving column were redesigned for better load-bearing efficiency. Finite element method（FEM） simulation and model experiments were carried out for performance verification, which showed the increase of structural static and dynamic performance. Structural bionic offers a new solution to change conventional structures for high specific stiffness.

Design method and vibration testing of a reconfigurable multi-process combined turn-milling machine tool

To provide a good machining method in remanufacturing for the repaired parts with various forms, the design method of reconfigurable multi-process combined machining system and its implementation technology for remanufacturing are systematically proposed. The key technologies include reconfigurable structure design method of multi-process combined machining, man-machine coordination parameter programming and control system technology with self-maintenance function. A turn-milling machine tool based on this design method is developed. Natural frequency and corresponding vibration modes of the machine tool were analyzed by using both FEA and vibration test. Stiffness tests and machining experiments show that the rapid machining of most processes for the repaired work pieces can be successfully realized.

参与式设计影响要素探析

针对参与式设计概念模糊以及用户参与性较弱现状,明确参与式设计要素,梳理用户参与目的、参与方法和工具。围绕参与式设计协作要素:参与者知识和参与工具,具体阐述参与对象和参与模式。并将参与式设计中的工具、技术和方法从参与形式角度分成制作、讲述和表演3类,探讨具体应用时目的与方式。参与式设计是一种设计理念,在设计过程中应用各种工具和方法获取用户的需求以及创新想法。通过分析参与要素与方法特点,设计实现非专家用户参与设计过程的工具,将对参与式设计在用户研究领域的应用具有重要意义。

平行闸板阀阀座孔加工专用车削刀具设计及实验研究

平行闸板阀被广泛应用在石油钻采配套装备中。采用普通内孔车削刀具加工平行闸板阀阀座孔,需要调头加工,难以使用切削液,并且由于刀杆刚度和硬度较小引起“颤抖”现象,加工工件时不易保证阀座孔的加工质量和形位公差。基于此设计了一套专用车削刀具,增大刀杆的刚度和硬度,方便使用切削液,而且仅需一次装夹,避免掉头加工,以满足阀座孔的形位公差和加工质量要求。采用有限元法对所设计刀具进行了强度校核。通过实验验证,所设计的刀具可以提高加工效率,满足加工质量和形位公差精度要求。

面向综合评估的船舶工装设计方法

针对船舶建造工装设计标准化程度低、设计不规范以及设计管理落后等问题,提出一种面向综合评估的工装设计方法。从工装库构建、智能设计、仿真评估与优化等角度开展工装数字化设计研究。基于工装模型库实现设计模型的有效管理和调用,并通过集成寻优算法实现工装最优布局,在此基础上基于有限元仿真和工艺仿真技术,结合具体指标,实现工装结构力学性能和工艺仿真评估,同时利用结构优化技术对设计结果进行优化,在满足使用需求的基础上降低了加工成本。基于达索三维体验平台开发数字化工装设计系统,固化设计流程,并通过分段吊马设计的实际应用,实现设计效率提升200%,同时重量减轻12.8%。

Optimal Design of Rotary Tool based on ANSYS Workbench

Rotary tool of garbage crusher is the key component of the whole mechanism, which is of vital importance to tool design and analysis. Based on ANSYS Workbench 3D modeling, we carried on finite element analysis to tool, and used the method of goal driven optimization to optimize the rotary tool. The optimization proves that the optimized maximum equivalent stress is 544.14 MPa, the quality is less, and the optimized rotary tool size is more reasonable. So it provided reasonable and scientific reference frame to the structural design of rotary tool.

田湾核电站堆顶电缆拆装工具的设计与应用

针对田湾核电站1~4号机组反应堆堆顶电缆大修维护仅能通过人力进行拆装且存在所需人力多、耗时长、效率低等问题,为提高设备检修效率,实现设备维护自动化,从实际使用需求出发,通过结构设计、电气设计以及设计计算对堆顶电缆拆装工具进行设计,并在现场验证其高效可用性。

体育教师专门性内容知识(SCK)评估工具的本土化研究及其信效度检验

针对我国体育教师专门性内容知识(SCK)的评估需求,对引进工具进行本土化修正,并全面检验其信效度。通过初次翻译、回译、比较修改、预试与评估等系统化流程,形成了《体育教师SCK评估工具(中文版)》,并运用其对179名体育教师展开调查,以验证该工具的可靠性与有效性。SCK评估工具由内容图、作答形式和评分系统3部分组成;信度检验显示评分者间相关系数介于0.863~1.000之间(p<0.01),评分者一致性为97.45%,范围为85.71%~100%,重测信度的相关系数范围为0.71~1.00(p<0.01),工具的稳定性高;表面效度检验显示工具能简洁、清晰地展现体育教师教学内容选择与设计的能力;内容效度检验显示工具的I-CVI得分为0.83~1.00,整体S-CVI达到0.94;工具在区分体育教师擅长与非擅长运动项目上的SCK水平时,具有显著差异性(p<0.01),展现了高度的敏感性与精准的区分力。《体育教师专门性内容知识评估工具(中文版)》可作为评估中国体育教师教学内容设置能力及SCK发展水平的有利工具,它的引入为我国体育教师的高质量发展提供了坚实的评估基础,也为教育评价体系的完善注入了新的活力。