双端面磨床用的端面砂轮

双端面磨床用两个相对安置的砂轮端面同时磨削工件的两个平面。机床的切削效率、磨削精度和光洁度与使用的砂轮有极大关系。本文介绍端面砂轮的结构型式,安装方法,以及选择、使用砂轮等有关问题。正确选择、使用砂轮能提高双端面磨床加工工件的精度和加工效率。     

双端面磨床自动测量仪

1.概述自动双端面磨床在轴承工业中获得广泛的应用,因为在这种机床上可用贯穿法同时加工轴承环的两个端面。我们所设计的双端面磨床自动测量仪用以完成下列任务: (1)待轴承环离开磨削区域后,测量其厚度,并按测量结果发出调整机床的讯号。(2)连续控制两砂轮工作表面的位置,根据砂轮磨耗的情况对砂轮磨损较大的砂轮     

用正交试验法选择磨削滚子端面的最佳参数

一、概述双端面磨床由于有两个砂轮同时磨削工件的两个端面,自动化程度和生产效率高,工作可靠性好,且机床操作简单,工件无残磁。因而在轴套以及圆柱、圆锥体等零件端面的磨削加工中得到了广泛的应用。然而,该类机床磨削高精度的端面调试较为困难。虽然有关资料对机床调试的有关参数如:砂轮端面在水平面内的相对倾斜量,在垂直面内的相对倾斜量,送料     

双端面磨床自动补调的误差分析与评定

通过分析主动测量仪的组成与工作过程,用于双端面磨床的补调测量装置的改造,以提高磨床磨削的加工精度,并对自动补调仪的误差进行分析,确定警告界限,提出减小误差的方法.     

双端面磨床的热变形

双端面磨床基本上可以分为两类，第一类是工作的直线进料磨削方式和以一端砂轮作为定基面的磨削方式。另外还有圆弧进料方式，采用该方式磨削时，工件或固定，或自由放置并在传送孔中旋转。在第二类机床上加工工件时，要求被加工工件相对于定位平面（传送盘平面）具有一定精度。此外，在加工圆柱滚子时，要求滚子两端面的磨削条件相同，砂轮端面相对于进料平面应该是对称的。应当指出，在第一类双端面磨床上加工工件时，磨床产生的垂直于进料平面的热变形将以被加工工件两端面的平行差的形式传递给加工工件。这里研究在第二种类型的双端面磨…     

大力为各行业提供高效双端面磨床

双端面磨床是平面磨床加工设备中的重要分支。由于双端面磨床具有磨削效率高、加工精度好、无需使用吸盘夹持工件等优点,因此在汽车、轴承、压缩机等大批量生产工业部门中的应用十分广泛。近年来,国际上双端面磨床制造技术有了很大发展,主要是提高加工精度、生产率及自动化程度,同时在机床本身结构方面作了许多改进,还采用CBN等先进磨料。     

硬质合金可转位刀片的磨削技术讲座——第六讲 可转位刀片的上下平面磨削技术

一、上下平面的磨削方法硬质合金可转位刀片的上下平面的精加工方法基本上有磨削法、游离磨粒加工法、研磨法等。1.磨削法(1)用金刚石砂轮双端面磨床磨削刀片平面金刚石砂轮双端面磨床属于专用设备,可同时磨削一批刀片的上下平面,效率高,表面粗糙度可达     

贯穿磨削中砂轮结构对磨削工件质量的分析

双端面磨床的磨削方式有贯穿式、往复式和工件自转式等,但贯穿式是基本的送进方式,用于磨削轴承环、活塞环和垫圈等工件。文中叙述了贯穿式磨削的工作原理及其引起的固有缺陷,提出用新的砂轮结构来解决贯穿磨削中的固有缺陷。阐述了组合砂轮、端面开槽砂轮、端面开孔砂轮的结构和使用效果,并介绍了国外双端面磨床的砂轮结构。最终提出作者的论点,通过实践,证实了用砂轮结构来解决贯穿磨削中的固有缺陷是可行的。     

数控双端面磨床送料圆盘转速预测算法的研究

针对传统双端面磨床恒转速磨削存在加工精度不高的缺点,提出了一种送料圆盘转速预测方法.首先根据恒磨除率原理和上下砂轮与送料圆盘的几何关系,建立了双端面磨削的数学模型;提出了送料圆盘变速控制方法,给出了每旋转一个角度后工件的磨削厚度和送料圆盘速度计算公式,根据工件磨削余量与光磨条件,计算了上砂轮的倾斜角调整值.将上述算法移植到力士乐MTX数控系统中,采用YTDM 580CNC/CBN数控立式双端面磨床对活塞环进行了磨削实验,经仪器检测,产品尺寸误差在2μm以内,表面粗糙度小于0.2μm.     

薄型板件平面的磨削加工

薄型板件刚性差,平面磨削时很易受热变形和受力变形,要达到较高的平面精度并适应批量生产有一定的难度。它的常规加工方法是在平面磨床上用砂轮磨削;较先进的加工方法是在双端面磨床上磨削;较新型的加工方法是在平面砂带磨床上磨削。某空调压     

基于PMAC-PC的HIPSN陶瓷套圈高速内圆磨削

利用高速陶瓷电主轴单元、直线电动机等设计集成了一套基于PMAC-PC的高速精密数控磨床系统，并用来进行陶瓷套圈内圆表面的磨削实验研究。在磨削实验过程中对砂轮电主轴进行了振动测试和分析，分析了影响陶瓷套圈内圆表面磨削质量和磨削效率的主要因素，加工出了高精度HIPSN陶瓷零件。通过实验验证了本磨床系统的稳定性，利用该磨床系统能实现HIPSN陶瓷零件的高速精.     

空间曲面数控磨削新工艺

研究了利用通用数控铣床，配置高速气动磨头对空间曲面进行数控磨削的方法、磨削参数、磨削效果、磨削区温度场分布等问题。该成果对推广应用通用数控铣床进行空间曲面数控磨削，有着重要的价值。     

叶片泵定子内曲面数控修磨

叶片泵定子曲面的形状比较复杂,修磨时往往需要专用仿形磨床。本文介绍了一种新的方法,可在数控铣床上,用普通圆柱砂轮对其进行磨削,并经实际使用,完全能够满足要求。     

DEVELOPMENT OF AN OPTICAL SCANNER TO STUDY WEAR ON THE WORKING SURFACE OF GRINDING WHEELS

The efficiency of the grinding operation is highly dependent on the grinding wheel surface topography. Several methods for the evaluation of the grinding wheel surface have been developed in the last few years. In some of these methods, the grinding wheel has to be removed from the machine for an evaluation using a microscope or a profilometer. Some other methods are able to measure the topography at the grinding machine, but they do not give detailed information about grain distribution and wear. This paper shows a new method to map the grinding wheel surface. The proposed system is based on an optical scanner capable of measuring the light beam reflected from the wear flat areas on the abrasive grains over the whole wheel peripheral surface. The Mapping System for Grinding Wheels (MSGW) is able to acquire data with the wheel running at the work speed (30 m/s)and the measurement carried out on the grinding machine without stopping. The system is applied on a surface grinding operation where an Alj0₃grinding wheel is used. The results show that the system can be used to map the wear flats at the grinding wheel surface and also to analyze the wear phenomena efficiently.     

曲面磨削工艺的研究

提出了在三轴数控工具磨床上,利用成形砂轮与数控插补相结合,对复杂曲面进行磨削的方案,解决了曲面磨削的难题.具有加工精度高、成本低、效率高等优点.     

A manufacturing model of helical groove on rotary burr and a universal post processing method

A systematic machining theory and precision method to determine cutter location in a grinding system is presented for rotary burr. First, the helical cutting edge on various kinds of revolving surfaces is built. Then, based on the geometry model of the helical cutting edge, the smooth spiral rake surface with constant normal rake angle and flank surface can been formed during the one-pass grinding process by this method. No interference between the grinding wheel and workpiece happens by the wheel special rotation. The method has the characteristic of detaching the grinding wheel path solution from specified machining conditions. The grinding wheel path is suitable for different NC machine tools through post processing. Meanwhile, a mechanism kinematic model of the NC machine tool is built, and a generalized algorithm for post-processing of multi-axis NC machine tools is presented. This model is applied to arbitrary configuration of NC machine tool, and the motion value for each axis will be generated by the inputting structure and motion parameters of the machine tool. The model, together with the machining method mentioned in this paper, make the calculation and generation of the grinding wheel path simpler and universal. At last, the validity of the method given in the paper is identified by an example of grinding.     

冷连轧复合材料砂带打磨机设计(上)

砂带打磨机是复合材料冷连轧生产线上的关键设备之一,用于复合材料冷轧前带材表面粗糙度处理。介绍砂带打磨机的工作特点、进口打磨机在生产中存在的几种缺陷;分析砂带磨削表面质量影响因素,探讨均匀打磨原理,改进设计打磨机构。根据纠偏原理,设计步进式砂带跑偏纠偏装置;改进设计侧导板机构等。实际生产使用表明,所设计的打磨机性能稳定,安装、检修方便,能够满足生产要求。     

五坐标数控磨床上使用圆锥面刃磨法加工麻花钻的一种方法

介绍了在五坐标数控磨床系统中使用圆锥面刃磨法加工标准麻花钻的一种方法.首先将锥面离散成若干条母线,然后磨削通过这些母线的与圆锥面相切的小平面从而逼近所需要的实际锥面,最后在空间中进行几次必要的坐标变换计算出磨削这些小平面所需要的刀位。     

开式砂带振动磨削

实验表明,在适当的加工条件下,砂带振动磨削不仅可降低工件的表面粗糙度,而且可以提高工件的形状精度。对一些砂轮磨削难以加工的工件,在普通床上安装磨削头架后就可以对其进行精加工。     

Silicon Carbide Surface Quality Prediction Based on Artificial Intelligence Methods on Multi-sensor Fusion Detection Test Platform

On the basis of the grinding process experiments for SiC ceramic workpiece, grinding process parameters are measured on the multi-sensor fusion detection test platform and experimental results are analyzed. Lempel–Ziv complexity (LZC) is introduced to reflect the integrated grinding process stability due to kinds of factors such as vibration from grinding machine parts and noise from experimental platform. The greater the LZC is, the fewer period factors are in the grinding process, which reflect the nonlinear correlations in the grinding process impacting on grinding process. A method is given based on LZC for analyzing grinding process stability. Under consideration of experimental results, a predictive model for surface quality is given by the Kernel Principle Component Analysis and Modified Extreme learning machine method (KPCA-MELM), and grinding process parameters can be optimized too. KPCA-MELM predictive model overcomes disadvantages of MELM predictive model of the randomness of weight ω and threshold value b by introducing improved genetic algorithm, which makes the roughness predictive error more accurate with the maximum error of 4.803%.