多线砂轮磨削螺纹

多线砂轮磨削是一种高效率加工螺纹工件的磨削方法。它是根据被磨削螺纹的牙型,将砂轮外圆修成与螺纹牙型相同的多个环形牙齿,用来磨削螺纹。     

螺旋槽螺纹铣刀的磨削砂轮设计

针对螺旋槽螺纹铣刀在磨削加工时内外侧磨削量不同的问题,通过齿形的数学建模和分析计算,提出了其磨削砂轮的修正量计算公式.同时编制了砂轮设计程序,实现了从螺纹铣刀参数到其磨削砂轮参数的自动转换.通过 AutoCAD 和 SolidWorks 应用开发,可以自动生成砂轮的二维图和三维模型.本文提出的方法可以提高螺纹铣刀磨削砂...     

多线砂轮磨削螺纹时的砂轮修整

多线砂轮磨削螺纹是一种高效率的加工方法,一般适用于0.75～3毫米螺距螺纹的批量生产,螺距过大的螺纹不宜采用。这种方法是在砂轮外圆面上修整出与被加工螺纹牙型相同的多个环形齿成为多线砂轮,再用它来磨削螺纹。多线砂轮的厚度可以大于工件螺纹部分的     

滚压多线砂轮磨削圆螺纹

在螺纹磨床上采用多线成型砂轮磨削,是一种高效率加工螺纹工件的磨削方法,这种加工方法,不仅生产效率高,而且加工精度稳定,适用于大批量和专业化生产。一、砂轮的滚压与磨削滚压多线砂轮是利用专用滚压轮,在宽砂轮的外圆上,滚压出所需要的多线圆弧砂轮。多线砂轮     

多线螺纹磨床加工圆锥管螺纹丝锥

众所周知,圆锥管螺纹丝锥通常采用单线螺纹磨床加工,其螺纹部分锥度的形成,一般用锥度靠模板,通过铲磨机构使砂轮按一定的规律退刀磨削。本文主要论述如何利用多线螺纹磨床加工圆锥管螺纹丝锥。     

双螺杆压缩机转子的精密磨削工艺研究

以螺纹磨削理论为依据,数控螺杆转子磨床为原型,砂轮直径变化量为关联尺寸,建立了螺杆转子磨削和砂轮修型的工艺尺寸链。利用该工艺尺寸链,可以精确计算出螺杆转子磨削用砂轮的精确廓形,同时可确定砂轮修型和螺杆转子磨削时机床运动参数,实现数控螺杆转子磨床的砂轮CNC精确修型和螺杆转子的精密磨削。对提高机床加工效率,保证螺杆转子加工质量具有实际意义。     

用多线砂轮磨削螺纹

随着我国社会主义建设的飞速发展,精密螺纹应用日益增多;用传统的单线磨削螺纹的方法,生产效率低,不能满足生产发展需要。为此,我们改装一台Y7520K螺纹磨床,成功地采用了多线砂轮磨削螺纹的新工艺,部分地取代了车、铣等粗加工工序和半精加工工序,其生产率较过去提高3～5倍。现将几年实践体会简介如下。 一、基本概念 多线砂轮磨削螺纹是一种高效磨削方法。它采用一梳形齿(相当于多个单片砂轮叠成的)砂轮作磨削工具,选用较小的工件转速和较大的磨削深度,把不经予加工的实心工件直接磨出所要求的螺纹,一次装夹完成螺纹的粗加工及半精加工。因…     

提高磨削方牙螺纹精度的方法

随着机械工业的发展,对螺纹件的精度要求越来越高。如何提高螺纹的加工精度,是必须解决的重要课题之一。在螺纹磨床上磨削螺纹是目前加工高精度、高光洁度螺纹比较理想的切削方法。方牙螺纹的加工,一般采用成型砂轮磨削。由于成型砂轮修整器结构上的缺陷,产生齿形直线性误差,齿形中部呈鼓形。此外,砂轮安装是按照零件中径螺旋升角倾斜的,根据螺旋角的计算公式,在螺旋角大于3°情况下,     

多线砂轮的新修整法和螺纹的多线磨削

螺纹磨床使用多线砂轮磨削螺纹是一种高效率加工方法。在国内,多线砂轮的修整历来是采用滚压成形的方法。但是,滚压用的钢制滚压轮要求较高,而对砂轮的滚压不但成形困难,而且又极易磨损(尤其是粗修砂轮),所以阻碍了螺纹多线磨削工艺在生产中普遍应用。为了改变传统的滚压修整法,我们设计了一种修整器,而且摸索出一套相应的修整法。它对多线砂轮的修整时间仅为滚压法的3/5。修整器因大颗粒金刚石的研制成功(由上海金刚石工具厂生产)就很容易解决     

椭圆曲线在螺旋滚道磨削加工中的应用

介绍了一种磨削滚动螺旋副传动中螺旋滚道所用砂轮的修整方法，使用椭圆曲线修正砂轮，使三圆弧螺纹滚道的磨削加工变得更加容易。     

FINISHING THE CONCAVE SHAPE OF THE WORM THREAD

The aim of this work was to improve the accuracy of the concave profile worm thread by using a new generating surface of grinding wheel. To support the geometrical and technological optimization, the current article describes how we produced a smooth and accurately finished tool that will provide maximum line of contact between the tool and the worm with minimum stress concentration at any point. The present study proposed grinding the thread with grinding wheel having a curvature profile in the axial plane in the form of an arc of hyperbola. The generating equation of the tool profile and its arrangement with respect to the worm during grinding were determined.     

FINISHING THE CONCAVE SHAPE OF THE WORM THREAD

ABSTRACT

The aim of this work was to improve the accuracy of the concave profile worm thread by using a new generating surface of grinding wheel. To support the geometrical and technological optimization, the current article describes how we produced a smooth and accurately finished tool that will provide maximum line of contact between the tool and the worm with minimum stress concentration at any point. The present study proposed grinding the thread with grinding wheel having a curvature profile in the axial plane in the form of an arc of hyperbola. The generating equation of the tool profile and its arrangement with respect to the worm during grinding were determined.     

MODIFICATION OF GEOMETRY AND TECHNOLOGY OF CYLINDRICAL WORMS

The objective of this research is to develop a new method of grinding process that can efficiently make concave profile of the worm thread smooth. The grinding is carried out using a wheel with curvature profile in the axial plane in the form of an arc of logarithmic spiral. The proposed method will provide maximum line of contact between the tool and the worm with minimum stress concentration at any point. The generating equation of the grinding tool profile and its arrangement with respect to the worm during thread grinding were determined.     

MODIFICATION OF GEOMETRY AND TECHNOLOGY OF CYLINDRICAL WORMS

The objective of this research is to develop a new method of grinding process that can efficiently make concave profile of the worm thread smooth. The grinding is carried out using a wheel with curvature profile in the axial plane in the form of an arc of logarithmic spiral. The proposed method will provide maximum line of contact between the tool and the worm with minimum stress concentration at any point. The generating equation of the grinding tool profile and its arrangement with respect to the worm during thread grinding were determined.     

磨削加工过程建模的研究进展

综述了磨削加工过程的几何建模过程中砂轮几何模型的建立方法、磨粒去除工件材料机制的研究进展,指出了其中存在的一些问题;阐述了磨削加工过程的物理建模过程中磨削力机理解析建模、经验公式建模的研究动态,分析了这些建模方法的局限性,简要介绍了磨削温度场建模中能量分配和热源形状的研究进展;讨论了对磨削加工过程进行数值模拟所存在的一些难点。     

钛合金的磨削烧伤和磨削裂纹

在分析和研究用树脂结合剂陶瓷结合剂刚玉砂轮以及绿色碳化硅砂轮磨削钛合金时产生磨削烧伤和磨削裂纹的基础上,提出了抑制钛合金磨削烧伤和磨削裂纹的措施。试验研究表明,合理的砂轮磨料和硬度等级、合理的磨削用量、高效磨削液和ＣＢＮ砂轮将有效地避免钛合金的磨削烧伤和磨削裂纹。     

可在线更换磨削轮的砂带磨削机床的研制

介绍了应用于机器人磨削加工系统中的可在线更换磨削轮的砂带磨削机床的结构原理。阐述了在线更换磨削轮的砂带磨削机床的磨削方式及其磨削力控制结构原理。     

Evaluation of wheel life by grinding ratio and static force

A degree of sharpness in wheel grains affects the surface roughness and dimensional accuracy in the grinding process. If a wheel with dull grains is used, the grinding force is increased and the surface roughness is deteriorated. In ovder to produce a precision component economically, the magnitude of the wear amount in the grinding wheel has to be limited. In this study, experimental evaluation of a wheel life varying with the grinding ratio and static grinding force was conducted. The grinding ratio and grinding force were measured to seek the grinding performance of the WA wheel. The relationship between the grinding ratio and static grinding force was presented.     

锥面砂轮磨齿机磨齿金属磨除率分析

通过对 Y715 0 D锥面砂轮磨齿机磨削过程的分析 ,分析了砂轮与工件的运动 ,进而讨论砂轮在磨削过程中金属磨除率及其变化情况 ,导出瞬时金属磨除率的计算公式。这对于研究磨削力、避免磨削裂纹、磨削烧伤等磨削缺陷是非常有意义的