机床铸件导轨镶铸冷却水管的工艺技术

机床铸件导轨镶铸冷却水管是一项新技术,介绍该技术的试验开发过程、铸造工艺参数的设计、生产过程的铸造工艺规范,本试验开发项目的成功将促进镶铸技术在机床铸件上的应用.     

Dispersion-strengthening effect of Cu-based Mn, Al, and Zn rich alloys

In this systematic study, dispersion-strengthening effect of the Cu–25.91Mn (wt.%), Cu–26.62Mn–8.99Al (wt.%), Cu–22.17Mn–12.32Zn (wt.%) ingot alloys have been investigated. Samples were homogenized at a high fixed temperature in different periods and cooled with different cooling rates. After processes, microanalysis of the samples were interpreted by using scanning electron microscope (SEM) and weight percentages of the elements of the occurrence phases in the samples obtained by using electron dispersion spectroscopy (EDS) technique. Additionally, some characteristic properties of the heat treated samples with different conditions of Cu–Mn, Cu–Mn–Al, Cu–Mn–Zn ingot alloys were also discussed.     

烧结炉中20g钢冷却管爆裂分析

对烧结炉中２０ｇ钢冷却管爆裂所进行的检验确认爆裂原因是冷却水量小及水质差引起堵塞，造成过热过烧。建议软化水质和改进冷却系统为解决途径。     

提高16MnL宽冷弯合格率的研究

通过对16MnL宽冷弯性能不合格的原因进行分析、试验，提出优化生产工艺的方案。在生产中取得了良好的效果。     

热处理工艺对高速钢轧辊组织和性能的影响

研究了淬火温度、冷却方式、回火温度和回火次数对高速钢轧辊组织和性能的影响。结果表明,空冷的高速钢轧辊淬透性差,油冷的高速钢轧辊易出现裂纹,盐冷的高速钢轧辊具有优良的淬透性,不易出现裂纹,辊面硬度高,硬度均匀性好,耐磨性好。     

梅山高炉长寿工作探讨

叙述梅山冶金公司高炉生产２５年来为不断提高高炉寿命所开展的工作，探讨和总结了高炉炉身，炉腹和炉缸长寿的具体经验。     

强迫风冷直线感应牵引电机工程化设计

根据地铁车辆直线电机的应用要求,对强迫风冷直线电机进行工程化设计:设计了轻量化的铁心结构、应用非金属轻量化材料,以满足电机重量指标;设计了强迫通风的冷却系统,风机额定工作效率保持在最高点,以保证电机温升满足设计要求;设计了适应电机绝缘等级的温度保护系统,以保证电机绝缘寿命等。最后通过电机型式试验,证明直线电机满足堵动推力、温升和轻量化等指标要求。     

Visibility-based conformal cooling channel generation for rapid tooling

In plastic injection moulding process, cooling channel design is an essential factor that affects the quality of the moulded parts and the productivity of the process. Non-uniform cooling or long cooling cycle time would result if a poorly designed cooling channel is adopted. Due to limitations of traditional machining processes, the cooling channel is usually formed from straight-line drilled holes and only simple shapes are allowed, regardless of the shape complexity of the part being moulded. With the advent of rapid tooling technology, cooling channels in complex shapes can now be possible. However, there are not many design methodologies for supporting this type of cooling channel. In this paper, a methodology called visibility-based cooling channel generation is proposed for automatic preliminary cooling channel design for rapid tooling. The cooling process between a mould surface and a cooling channel is considered analogous to whether they can be visible from each other. Without loss of generality, the mould surface is approximated by a polyhedral terrain and is normally offset. A number of point light sources together that can illuminate the whole polyhedral terrain are assigned to suitable terrain offset vertices. A cooling channel is then generated by connecting all the assigned light sources. When comparing the conventional verification and redesign methods by melt flow analysis, computer-aided design and, a better design of cooling channel for its mould surface results in a short time independent of the experience of mould engineer.     

冷喂料胶管生产线的自动控制系统

The current status of colloidal tube production in China and the technique process of the tube prod uction are described in brief． The funct ions and the implementation of the control system, the mathematical model of the PID operation and the block diagram of program are introduced in detail．     

模拟退火算法中冷却调度选取方法的研究

模拟退火算法是解决组合优化问题的有效方法,冷却调度是它的关键部分,该文给出了切始温度,降温策略,Ｍａｒｋｏｖ链长度以及停止准则的取方法,尤其是在停止准则方面,借鉴禁忌搜索的思想同一种新的模拟退９火算法停止准则,以上方法在中国３１城市银行商问题以及抖动模式事得的有效应用。