共查询到19条相似文献,搜索用时 187 毫秒
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分析了锁挡零件的结构工艺性和冲压工艺,介绍了零件的排样方案、模具总体结构、工作过程、主要零部件的设计,并阐述了模具结构特点.模具结构合理、紧凑,工作平稳,生产效率高,生产的零件质量达到要求. 相似文献
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针对由于汽车模具调试工时难以确定所导致的制造成本和生产周期与生产实际相差较大的问题,提出了基于工时管理系统的汽车模具调试工时估计方法.在该方法中,以企业实际生产的工时信息为基础数据,利用统计区间估计算法,对采集到的模具产品工时数据进行统计整理和计算,建立了整个调试过程的工时标准,并依据这一工时标准,提出了以工时控制图为工具的工时管理方法. 相似文献
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基于成组技术对注塑模具及模具零件进行分类编码以建立注塑模具分类编码系统;然后将同类型模具零件中典型零件的工艺信息制作成典型模具零件工艺模板;最后利用VB和SQL Server数据库技术建立注塑模具工艺管理系统.通过该系统可以实现按模具类别和编码查询标准工艺、并修改保存或者添加新的工艺模板,通过查找相似模具零件典型工艺模板并加以修改以制定出欲加工模具零件的加工工艺. 相似文献
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周晓明 《中国新技术新产品》2011,(3):202-202
模具制造技术,既是先进制造技术的重要组成部分,又是先进制造技术的重要应用领域,其技术水平与先进制造技术的发展与应用密切相关.模具是制造业的核心技术装备。模具工业不发达将严重影响汽车、IT与电子技术产品、机电产品、航空(天)与船舶和建材、家用电器等制造业产品的生产。因此,研究模具的现代化设计与制造技术,研究模具设计制造过程中的实践经验,以及生产过程的技术管理与过程控制,并使之形成规范,形成专家系统,对提高模具生产技术与管理水平、提高模具企业核心竞争能力,将至为重要。 相似文献
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王宁 《中国新技术新产品》2009,(16):127-128
本文分析了模具的形状特点和技术要求,设计了一付普通浇注系统三层注射模具,并解决了该注射模的自动脱模问题。介绍了模具结构和动作过程。实现了在小型注射机生产多腔较大型的塑件。实践证明该模具安全可靠,提高了生产效率。 相似文献
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介绍了生产线信息管理系统.本系统基于面向对象的编程语言Visual C++6.0和SQL 2000数据库作为开发平台,采用ODBC技术对数据库进行访问,利用Visual C++6.0进行界面的相关设计来实现生产线信息数据的记录、增加、修改、查询、打印报表和列表视图等技术,同时还通过用户密码登陆企业生产线信息管理系统,用来提高生产线信息管理系统的安全性. 相似文献
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The dynamic mold temperature control system is the key of rapid heat cycle molding (RHCM) technology because it significantly affects the stability of the process, productivity and the quality of the final polymer part. For this reason, the approaches and techniques for dynamic mold temperature control were discussed in this study and two different dynamic mold temperature control methods, respectively, with steam heating and electric heating were found to be very feasible in mass production. The methods and principles of mold design for the two RHCM technologies were also discussed and then several different kinds of mold structures were designed. By constructing the corresponding thermal response analytical models for these RHCM molds, the temperature responses of the molding systems in the heating and cooling process of RHCM were simulated and studied. The effects of the mold design parameters such as the insulation layer between mold plate and mold inert, and mold material, on thermal response efficiency and temperature uniformity of the two RHCM processes were analyzed based on the simulation results. The results show that the insulation layer can increase the upper limit temperature of RHCM with steam heating and improve the heating speed of RHCM with electric heating. It can also greatly decrease the energy consumption of the two RHCM processes. The heating efficiency of RHCM with steam heating can be effectively improved by increasing the thermal conductivity of the cavity/core material, while the situation is diametrically opposite for RHCM with electric heating. Therefore, we acquired an optimized mold design principle and method for RHCM with steam heating and electric heating, respectively. Finally, a new electric heating mold with a cooling plate was proposed to enhance the cooling efficiency. The thermal response of this new electric heating mold was also simulated. The simulation results show that the cooling plate can significantly improve the cooling and heating efficiency. 相似文献
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快速热循环注塑成型技术是一种绿色环保的新兴注塑成型技术。相比常规注塑成型技术,该技术可显著改善塑件表面质量,获得表面高光且无熔痕的塑料产品。采用快速热循环注塑技术可避免常规注塑过程中的后续喷涂工艺,从而降低生产成本,简化生产流程,缩短生产周期,所生产的塑件可直接用于产品装配。在具体技术和工艺研究两个方面详细介绍了快速热循环注塑技术。在具体技术方面,阐述了快速热循环注塑成型技术的工艺原理,介绍了模具快速加热与快速冷却的方法,以及随形加热与冷却管道的设计制造;在工艺研究方面,综述了快速热循环注塑数值模拟方面的研究,介绍了快速热循环注塑工艺改善产品质量的内在机理。最后,分析了快速热循环注塑技术依然存在的问题,并对其未来的发展趋势进行了展望。 相似文献
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Rapid heat cycle molding (RHCM) is a molding process that the mold cavity is rapidly heated to a high temperature before plastic melt injection, and then cooled quickly once the cavity is completely filled. Heating/cooling efficiency and temperature uniformity of the RHCM system are two key technical parameters to ensure a high productivity and high-quality products. In this study, a numerical model to analyze the heat transfer in heating and cooling phases of RHCM was built. The effect of heating/cooling medium, layout and structure of the heating/cooling channels, mold structure, etc., on heating/cooling efficiency and temperature uniformity was studied and discussed by analyzing the thermal responses of the molding system in RHCM process. Based on the simulation results, the optimization design of the RHCM mold with hot-fluid heating was performed. Then, a new RHCM mold structure with a floating mold cavity was proposed to improve the heating/cooling efficiency and temperature uniformity. The effectiveness of this new mold structure was also verified by numerical experiments. At last, a RHCM production line with steam heating and water cooling was constructed for a thin-wall plastic part. In testing production, the molding systems can be heated and cooled rapidly with a molding cycle time of about 72 s. The production results show that the aesthetics of the molded parts was greatly enhanced and the weld mark on the plastic part’s surface was completely eliminated. 相似文献
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基于DWGDirect访问AutoCAD DWG图形文件 总被引:2,自引:0,他引:2
文章介绍了DWG文件的数据格式和利用DWGDirect C++函数库进行接口程序开发的主要流程。DWG文件分为头部、实体部、表部、块实体部和应急头部5个部分,对各部分的存储信息给予了简要介绍。DWGDirect是开放设计联盟(Open Design Alliance)开发的函数库,可以脱离AutoCAD平台实现对DWG文件的读写操作。针对CAD/CAM应用软件,讨论了对DWG文件中加工图素的读取操作实现方法,并给出部分C++代码。 相似文献
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函数重载是C++语言多态性的重要体现,也是面向对象程序设计的常用方法,Fortran 90不支持面向对象程序设计,但已经具有一些现代语言特征,为模拟面向对象程序设计提供可能,在分析C++函数重载机制的基础上,通过对Fortran 90相关语言元素、工具的探索,提出利用Fortran 90新增加的接口块这一利器模拟C++函数重载的方法,实例运行结果表明,该方法现实可行,从而扩展Fortran 90的应用范围,并为模拟面向对象程序设计提供思路。 相似文献