共查询到20条相似文献,搜索用时 62 毫秒
1.
2.
论述了精密加工环境和工件温度控制的必要性,提出了一种成本较低的变频空调系统和切削液恒温喷雾冷却系统的设计方案,同时对加工系统温度的监测进行了探讨。 相似文献
3.
4.
5.
6.
艾文斯 《机械工人(冷加工)》2002,(5):16-16
机械零部件制造加工过程中,铝合金材料得到了广泛的使用。铝合金与大部分钢材和铸铁材料相比,具有一个明显的优点:较低的屈服强度。因此,加工中需要的切削力较低,可以在刀具不发生过量磨损的情况下提高切削速度和进料比。但是,就铝合金的切削性能而言,它的柔韧性会带来两个严重的问题:第一,容易出现粘结的现象。铝质颗粒粘结到切削刀具的表面,严重影响加工件表面粗 相似文献
7.
在概述了金属切削液及其发展的基础上,指出了目前冷却方法即使用切削液过程中存在的主要问题;列举了当前国内外在探索新的冷却方法方面的进展,提出在世界性环境意识提高的大背景下,少、无切削液加工技术将是制造业未来发展的一个重要趋势。 相似文献
8.
切削加工冷却方法的现状与发展 总被引:4,自引:0,他引:4
在概述了金属切削液及其发展的基础上,指出了目前冷却方法即使用切削液过程中存在的主要问题;列举了当前车内外在探索新的冷却方法方面的进展,提出在世界性环境意识提高的大背景下,少、无切削液加工技术将是制造业未来发展的一个重要趋势。 相似文献
9.
绿色机构加工的研究现状及其发展 总被引:1,自引:0,他引:1
以绿色制造为基础提出了绿色机械加工的概念,并阐述了其内涵,概述了绿色机械加工的特点及其应用,指出尚待解决的主要问题,并探讨了其发展趋势。 相似文献
10.
张书桥 《世界制造技术与装备市场》2001,(4):50-51
20世纪90年代以后,工业发达国家的机械制造行业受到政府的环境立法和降低成本的双重压力.因为环境问题和资源问题是当今和将来人类社会面临的主要问题,特别是环境问题对人类的危害越来越大,制造业是产生环境污染的主要根源.如何使制造业尽可能少地产生污染,提出了"绿色制造"这一概念. 相似文献
11.
12.
在机械加工机床中,机床及机械模具的精度直接影响加工零件的精度。为确保加工零件的加工精度,机床及机械模具的精度应当与所加工零件要求的精度相适应。机械模具的加工精度受夹具、刀具、量具选择的差异性,加工过程中会使机械加工精度受到不同程度的影响。加强对影响机械模具加工精度的因素的控制,就可以有效的提高机械模具加工的进度。本文介绍了机械模具高精度加工的要求,分析了影响机械模具加工精度的主要因素。在此基础上探讨了机械模具加工精度控制策略。旨在为机械模具高精度加工制造提供一些参考。 相似文献
13.
14.
15.
不同方式的插补后加减速控制对加工精度影响的研究 总被引:1,自引:0,他引:1
探讨了不同方式的插补后加减速控制对加工精度的影响,提出在进行数控系统伺服控制优化调整时应根据具体情况选择和调整. 相似文献
16.
17.
Russian Engineering Research - In research on thread cutting, the flaws inevitably arising in the first two and last two turns of the thread, when the process is unsteady, are analyzed.... 相似文献
18.
《机械工程与自动化:英文版》2013,(8):465-472
To meet the demands for highly advanced components with ultra precise contour accuracy and optical surface quality arising in the fields of photonics and optics, automotive, medical applications and biotechnology, consumer electronics and renewable energy, more advanced production machines and processes have to be developed. As the complexity of machine tools rises steadily, the automation of manufacture increases rapidly, processes become more integrated and cycle times have to be reduced significantly, challenges of engineering efficient machine tools with respect to these demands expand every day. Especially the manufacture of freeform geometries with non-continuous and asymmetric surfaces requires advanced diamond machining strategies involving highly dynamic axes movements with a high bandwidth and position accuracy. Ultra precision lathes additionally equipped with Slow Tool and Fast Tool systems can be regarded as state-of-the-art machines achieving the objectives of high quality optical components. The mechanical design of such ultra precision machine tools as well as the mechanical integration of additional highly dynamic axes are very well understood today. In contrast to that, neither advanced control strategies for ultra precision machining nor the control integration of additional Fast Tool systems have been sufficiently developed yet. Considering a complex machine setup as a mechatronic system, it becomes obvious that enhancements to further increase the achievable form accuracy and surface quality and at the same time decrease cycle times and error sensitivity can only be accomplished by innovative, integrated control systems. At the Fraunhofer Institute for Production Technology IPT a novel, fully integrated control approach has been developed to overcome the drawbacks of state-of-the-art machine controls for ultra precision processes. Current control systems are often realized as decentralized solutions consisting of various computational hardware components for setpoint generation, machine control, HMI (human machine interface), Slow Tool control and Fast Tool control. While implementing such a distributed control strategy, many disadvantages arise in terms of complex communication interfaces, discontinuous safety structures, synchronization of cycle times and the machining accuracy as a whole. The novel control approach has been developed as a fully integrated machine control including standard CNC (computer numerical control) and PLC (programmable logic controller) functionality, advanced setpoint generation methods, an extended HMI as well as an FPGA (field programmable gate array)-based controller for a voice coil driven Slow Tool and a piezo driven Fast Tool axis. As the new control system has been implemented as a fully integrated platform using digital communication via EtherCAT, a continuous safety strategy could be realized, the error sensitivity and EMC susceptibility could be significantly decreased and the overall process accuracy from setpoint generation over path interpolation to axes movements could be enhanced. The novel control at the same time offers additional possibilities of automation, process integration, online data acquisition and evaluation as well as error compensation methods. 相似文献
19.
五轴联动数控加工运动复杂,影响零件加工精度的误差因素很多,针对目前五轴加工误差模型比较单一,还没有将多个误差因素综合考虑起来进行分析及预测的现状,提出了基于多体系统理论建立工艺系统综合误差模型的统一方法,详细研究了工艺系统综合误差模型的计算机映射方式,基于VS2010与OpenGL开发了具有可视化交互界面的五轴铣削加工精度预测系统,可在加工前对零件的加工精度进行预测。实际切削加工试验证实了该系统对零件加工精度预测的准确性和有效性,表明基于多体系统理论的精度预测方法是可行的。 相似文献