制动器摩擦片自动检测系统

介绍了汽车制动器摩擦片直径与垂直度自动检测系统,重点分析了检测原理和微机系统的软硬件设计.该系统除上下料以外,全部实现了自动化,完成一个工件的检测仅需40 s,重复精度达到0.02mm,满足了检测工艺的要求.     

轻型汽车液压制动系统CAD

介绍汽车液压制动系统CAD的总体构造、主要功能模块和运行机制,建立了汽车液压制动系统设计分解模型,最后阐述该软件系统在某轿车液压制动系统国产化过程中的运用实例.     

Total quality control for automotive raw foundry brake disks

In this paper, a solution for the automatic raw foundry brake disk dimensional characterisation and visual inspection for the automotive industry is presented. Three different computer vision techniques are used: a calibrated 3D structured-light vision technique, for dimensional characterisation and inspection; a 3D uncalibrated structured-light vision technique for local fault detection; and a common 2D-vision technique for a further local fault recognition. A new and fully automated 3D-calibration procedure for piece dimensional characterisation is also described. The whole system is an accurately synchronised blending of mechanics, automation, computer vision and robotics. Results from industrial implementation are presented.     

作用在防抱制动系统上的外转矩

本文研究了采用一个附加的驱动力矩作用于一带ABS系统的控制机构来缩短制动距离的可能性。在该ABS的控制周期内，只有减小制动压力才能使锁止轮再加速，当在制动压力比较低的阶段可采用一外加牵引力矩来缩短加速时间。可用车辆发动机或一个附加电机作为一个外加牵引力矩源。可以用一个数字模型来研究该系统缩短制动距离的可能性。采用一个仿真模型来分析该附加加速力的影响，并获得可缩短制动距离达到10％的结论。     

夹绳器专用电磁铁的设计

通过对一种电梯上行超速保护装置广泛采用的夹绳器的简单分析．引出了安全部件所用的电磁铁的性能要求．详细分析了直流电磁铁的时间特性．给出了优化直流电磁铁时间特性的几种方法。     

无机房电梯紧急救援存在问题及对策

基于对无机房电梯紧急救援应具备的要素归纳，简要分析了几种常见无机房电梯紧急救援方法的可行性及在实际应用中存在的主要问题，并从产品设计、日常管理以及检验检测等3个方面提出了相应对策。     

Friction and wear of sintered metallic brake linings on a C/C-SiC composite brake disc

The friction and wear of sintered metallic brake linings on a C/C-SiC composite brake disc were studied. This paper reports on the friction and wear properties of sintered metallic (MMC) brake linings, which appear to combine well with a C/C-SiC brake disc. The friction characteristics were examined with a dynamometer on two different commercial motorcycle brake systems, differing in terms of the brake caliper and the dimensions of the disc. The influence of the components, such as graphite, and the abrasives in the metallic matrix on the formation of the friction layer was investigated using a scanning electron microscope (SEM) equipped with energy-dispersive X-ray spectroscopy (EDX). The friction layer formed on the pad's sliding surface by oxidation wear, which consisted mostly of iron and copper oxides, was confirmed. The friction properties of the sintered metallic brake pads were determined and related to the composition and structure of the brake lining. This investigation of the friction characteristics of a brake couple comprising (MMC) brake linings and a C/C-SiC composite disc will increase our understanding of this material, which works in a completely different way to classical brakes based on metallic discs.     

Development of fly ash-based automotive brake lining

Coal-fired power plants all over the world generate huge amounts of fly ash each year, 70 million tons of which are produced in the United States alone. Only 40% of all fly ashes generated in the USA find beneficial applications and rest have to be disposed off, which is burden for the generation industry. Fly ash particles possess certain characteristics that make them suitable for use in friction composites as a filler material. An attempt has been made through this research to incorporate more than 50 wt% of fly ash particles in automotive brake lining friction composites. This paper presents the research carried out on development of friction composites, using fly ash obtained from a specific power plant in Illinois. Ingredients such as phenolic resin, aramid pulp, glass fiber, potassium titanate, graphite, aluminum fiber and copper powder were used in the composite development phase, in addition to the fly ash. The developed brake lining composites have exhibited consistent coefficients of friction in the range of 0.35–0.4, and wear rates lower than 12 wt%.     

制动摩擦系统的研究与设计

针对制动摩擦系统的特点,分析了制动器摩擦学设计的研究内容。主要包括无石棉摩擦材料及对偶材质的选用,对偶表面形貌对制动摩擦性能的影响,提出了有利于摩擦热散出、转换的制动器结构设计,并指出今后制动器基础研究的发展方向。     

国外井下铲运机的现状与新发展

国外井下铲运机的发展动态表明,主要矿山设备及零部件生产厂家在改进铲运机整机性能,优化零部件设计获得了新的进展,这为我国铲运机的设计,制造和使用提供了可资借鉴的技术文献。