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Key engineering materials
Trans Tech Publications Ltd.
Key engineering materials

Trans Tech Publications Ltd.

半月刊

1013-9826

Key engineering materials/Journal Key engineering materials
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    Deformation Analysis of Thin-Walled Workpiece under Multi-Stress Coupled Effect

    D. LuG.H. QinY.M. RongC.M. Peng...
    284-288页
    查看更多>>摘要：This document Cutting stress coupled with clamping stress and initial stress affects the workpiece deformation. To analyze the workpiece deformation the initial stress model is developed. The finite element model of milling process is established and the milling force and milling heat is predicted. The multi-stress coupled model is developed and the workpiece deformation during machining process and deformation after fixtures released are predicted. This study is helpful to predict and control the deformation for thin-walled workpiece.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd

    Development of Case Database of Fixtures Based on SolidWorks

    J. LinG.Y. TanB.C. LiuY.M. Rong...
    289-293页
    查看更多>>摘要：This work employs Visual Basic and Access to develop a case database management system for flexible fixtures using coding technology and parameter driving technology. The database management system of fixtures' cases is built. The secondary development of SolidWorks is performed by VB 6.0, and the system is transplanted to SolidWorks. The system can realize the fixtures' auto coding, storage, search, display and system management with simple operation and convenient maintenance. The system has a large flexibility as the case database can be expanded and the fixtures' parameters can be modified according to actual situation of enterprise without limitations of the software.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd

    Plastic Behavior of Laser Cladding Sample under Repeated-Impact Load

    S.H. ShiG.Y. Fu
    294-298页
    查看更多>>摘要：Low stress repeated impact experiments and test were carried out on medium carbon steel and stainless steel samples which is clad with high-strength Co-based or Ni-based alloy. The results showed that under low stress repeated impact load, which is much lower than the yield strength of material, plastic deformation will be occurred on the coating and part of its below base material. The average plastic deformation degree caused by each impact is increased at first, and then declined with the increase of impact times. Accumulated impact will lead to macroscopic plastic deformation and material hardening. The degree of deformation and the size of deformation area are related to the impact stress value and the material's strength. The degree of deformation and hardening decline from the exterior to the interior, and only occur on the impact surface and a certain depth below, forming a 'deformable area'. Based on our analysis, we consider that low stress repeated impact deformation is a kind of accumulative fatigue damage. The energy absorbed by material under repeated impact load, is larger than that absorbed at the same peak value of stress under static load or static fatigue load. Moreover, the energy absorbability is inversely proportional to the impact distance. Repeated impact may increase the movability of atom, reduce the critical shearing stress, that make the dislocation be initiated and increased easily.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd

    Research on the Performance Simulation of the Transmission System of Loader with Secondary Regulating Technique

    F.Y. Zang
    299-302页
    查看更多>>摘要：Based on deeply analyzing the working principles and energy-saving theory of loader secondary regulating transmission system, regenerating the transmission system's inertial energy by controlling constant torque was put forward. Considering large changes of the parameters of the transmission system and its non-linearity, a fuzzy control was adopted to control the transmission system, and the mathematical model of the system was established, then the simulations of the performance of the transmission system has been conducted. The conclusion was made that the inertial energy can be reclaimed and reused in the system by the application of the secondary regulation technology, and braking by controlling constant torque is stable, it can ensure the security of braking at high speed and also permits changing the efficiency of recovery by changing the braking torque. The system's power has been reduced and energy saving has been achieved.
      原文链接:
    • NETL
    • NSTL

    Research on the Disassembly Design of the Used Cars

    Y. Liu
    303-307页
    查看更多>>摘要：Automotive components in the analysis of end-of-life recycling programs, based on the study of automobile recycling techniques and strategies; the establishment of the Waste Recycling automotive components model, a vehicle designed for Recycling and Design for Disassembly The criteria for the design. At the same time, the disassembly of the establishment of a design-oriented model of car design to explore the design for the disassembly of the key recovery technology, pointed out that the recycling-oriented design and design for disassembly is to save resources, reduce costs and realize the design of automotive products and green automotive industry to create an effective model of sustainable development one of the means.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd

    Strength Analysis of 2000L-B Vertical Mixer's Blades with FEM

    B. LiuX.J. LiuZ.Y ZhaoL. Liao...
    308-311页
    查看更多>>摘要：The torsion load of 2000L-B vertical mixer's blade was firstly calculated by the relation between torsion input and output of planetary gear train. Then by means of finite element software ANSYS, analyses on stress and displacement of solid blade and hollow blade in mixer were carried out. As result, the stress and displacement contour maps were obtained and the maximum stress and deformation values were found. The strength checking of blade indicated that the blade had enough stability and strength margin.
      原文链接:
    • NETL
    • NSTL

    Connotation and Design Principles for Quality Evaluation Indicator System of Cooperative Education

    G.F. DuY.Zhao
    312-315页
    查看更多>>摘要：General evaluation is the complex of a variety of evaluation indicator. The evaluation result is objective and accurate or not, it is influenced by many factors. The first factor is whether evaluation indicator is comprehensive and representative, the second one is whether indicator weight is scientific and reasonable, the third one is whether evaluation standard is complete and realistic, and in the end, evaluation result is related to the design of evaluation indicator. On the basis of the study for connotation of cooperative education quality evaluation indicator, the design principles of evaluation indicator is established.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd

    The Research of Industry-University Collaboration in Market Economy

    Y. ZhaoW. ZengZ.C. Wan
    316-319页
    查看更多>>摘要：This article studies deeply motive forces of cooperative education in our market economic condition from students, schools, businesses and community. The research believes: Students are the mainstay of cooperative education, the motive force comes from knowledge, improving their comprehensive quality and enhancing the competitiveness of society; Schools are the "stage", and its motive force comes from improving the quality of teaching and from the transformation of accelerating scientific research; Enterprise is the guide, its motive force comes from cost savings and the attraction of talent, the using of technical results of colleges and universities to update the results of scientific research; The society provides a good environment for cooperation education. The development of cooperative education needs the community's participation and support. The study results give some good advices to promote cooperative education more.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd

    Study on the Kinematics of the Lips of the Twist Drill on the Axial vibration Part 2: Theoretical Chip Length and Dynamic Angles of the Drill

    L.Z. GuQ. HongC.J. Xiang
    320-324页
    查看更多>>摘要：In vibratory drilling, the chip lengths and working angles alter respectively, and play important part in the process for the quality, efficiency, and chip breakage. The length of the edge movement in real drilling is just the theoretical length of the chip as the distance between the adjacent entering point and detaching point. It is revealed that from the condition of h_m=0, the chip breaks automatically in the disjunction vibratory drilling pattern. Change of the dynamic angles was researched and based on the finding that the dynamic angle change undulates cyclically versus vibratory phase angle as well as the axial velocity in magnitude and direction of the drill, generated from the input of vibratory signals, the best performance of the drill in work may be pursued with the optimal working angle and clearance angle obtained by selecting the input vibratory parameters and selecting other drilling parameters in proper order.
      原文链接:
    • NETL
    • NSTL
    • Trans Tech Publications Ltd

    Applications of Pro/Program in Parametrical Modeling of Mechanical Components

    J. L. Song
    325-329页
    查看更多>>摘要：Based on parametric techniques, feature techniques, and feature-based parametric modeling techniques, the system of the parametric feature modeling techniques family and its modeling method were put forward to realize rapid and efficient modeling. The technical term of family table, the steps and characteristics of family table modeling were proposed firstly. Then, Pro/program and its application in the parametric modeling of mechanical products were discussed in detail, and a feature-based parametric prototype was developed by UDF. Finally, a running example of feature-prototype for spur gears was given to demonstrate the validity and efficiency of the feature-based parametric modeling techniques family.
      原文链接:
    • NETL
    • NSTL