Y38滚齿机加工少齿数齿轮的理论研究

根据范成法原理和Y38滚齿机备用挂轮情况,从理论上分析了Y38滚齿机加工齿数小于8的少齿数齿轮的可行性;在实验的基础上,分析了加工少齿数齿轮时滚齿机不能正常启动的原因,并提出了改造方案,改造后的Y38滚齿机可以加工出少齿数齿轮。     

对角(切向)滚齿加工的应用

本文介绍了利用YLN3150型滚齿机采用对角滚切方式加工锥店花键轴,以及采用切向滚切方式加工非对偶蜗轮的方法.分析了用该型号滚齿机进行这两种加工时,比其它对角滚齿机的优越之处.为这两种以及诸如此类工件的加工提供了一种经济实用的工艺方法.     

彭形齿数控加工系统设计

阐述了将只能加工直齿的滚齿机改造成可加工鼓形齿的数控滚齿机的改造原理。     

数控改造滚齿机加工鼓形齿轮

通过实例加工,在保留普通滚齿机原展成传动链的基础上,数控改造滚齿机,控制滚齿机的垂直丝杠和水平丝杠,进行呈圆弧齿向的鼓形齿轮加工,同时可实现圆弧齿向的齿轮倒角加工,并叙述了数控加工所需编程参数的转换计算与公式推导,还对改变数控系统脉冲当量和加工运行速度的控制阐述了其理论根据和成因,介绍了实际改造中的具体解决措施.     

少于滚齿机允许齿数的圆柱斜齿轮滚齿探讨

叙述了ＹＧ３６１２卧式高精度滚齿机轮的搭配,可完成少于滚齿机允许加工齿数的圆柱斜齿轮的滚齿加工。     

大型齿圈主要加工设备的研究与实践

从大齿圈传统加工设备的现状和存在问题入手,对如何扩大设备加工范围、提高大齿圈加工精度和效率进行了研究。介绍了主要加工设备多铣头铣齿机、数控滚齿机和传统滚齿机扩径改造的关键技术;阐述了提高大齿圈加工能力和效率所需具备的设备条件。通过实际应用和数据对比得出结论:用数控铣齿机进行粗加工,可使齿轮精加工余量控制在较小范围;多铣头数控铣齿机与滚齿机配合加工,能够使齿轮加工效率成倍提高;大型数控滚齿机采用大直径高精度蜗轮双蜗杆边缘传动和零传动技术,有利于提高机床运转平稳性和齿轮加工精度;传统小直径重型滚齿机在传动结构不变的情况下,可以通过扩径改造加工大直径齿圈,但加工精度有所降低。     

无差动机构滚切斜齿的计算

在滚齿加工中,有一些滚齿机如一些仪表滚齿机和农用滚齿机,或有的滚齿机虽有差动机构,但选配不到合适的挂轮。在这种情况下也可实现对斜齿圆柱齿轮的加工,这时工作台的附加运动是通过进给运动和分齿运动的合理搭配来实现的。本文对如何正确使用无差动机构滚切斜齿的计算公式及加工精度进行了分析计算。     

卧式滚齿机加工热连轧扁豆型花纹轧辊

本文介绍了太钢机械厂用卧式滚齿机加工扁豆型花纹轧辊、机床改造及扁豆型花纹轧辊的加工工艺。花纹轧辊加工开发的成功,填补了山西省空白,而用卧式滚齿机加工扁豆型花纹轧辊属国内首创。     

滚斜齿轮差动挂轮通用QB程序

使用QB语言编制滚齿机精密加工所需差动挂轮组通用计算机计算程序,使滚齿机加工斜齿轮的螺旋角加工精度提高.     

滚齿机热变形分析与误差检测新方法

对滚齿机加工热变形现象及热变形对齿轮加工精度的影响进行分析和讨论。提出了一种滚齿机热误差的新型检测方案,该方案可全面、有效地检测出热变形引起的滚刀与加工工件位置偏差现象,这对滚齿机热变形分析及误差检测有重要的理论和实际意义。     

螺旋锥齿轮齿顶旋分倒棱技术研究

针对实际生产中螺旋锥齿轮主要依靠工人操作砂轮完成齿顶倒棱加工的问题,提出一种旋分倒棱加工方法。首先给出螺旋锥齿轮齿顶旋分倒棱加工原理;然后以旋分倒棱加工原理为指导,设计理论砂轮中心轨迹和实际砂轮中心轨迹生成规则,并给出计算方法;最后基于其原理和规则,建立了理论砂轮中心轨迹和实际砂轮中心轨迹的逼近模型,并通过剖析各参数对逼近误差的影响进行了有针对性的砂轮中心轨迹优化。用具体计算实例证明了螺旋锥齿轮齿顶倒棱加工工艺方法的可行性,为深入研究其加工工艺提供了可资借鉴的理论和方法。     

Study on precision grinding of screw rotors using CBN wheel

With increasing demands for high-speed and high-precision machining technology, CBN shape grinding is an effective means in the field of precision machining for screw rotors. Aiming at the high precision machining of screw rotors, a mathematical model for the axial profiles of the CBN wheel for machining screw rotors is developed based on theory of gear engagement. Small electroplated CBN wheel is firstly used to grinding screw rotors. Taking the backlash of screw rotors and the coating thickness of CBN layer into consideration, the modification of the base body of the wheel shape is introduced into the design of CBN wheel. For reducing the tooth profile errors of screw rotors induced by mounting errors and wears of CBN wheel, a mathematical model of the error analyses is established and the influence curves of the profile errors affected by mounting errors and radius error of grinding wheel are proposed. The electroplated CBN wheels for the screw rotors are made to verify the validity and effectiveness of the presented method and the machining experiments were performed. Results of this study reveals that the method proposed in this paper can be used as the precision grinding of screw rotors.     

飞刀粗加工蜗轮时实际工作后角的研究

飞刀广泛应用于单件小批，大模数蜗轮的加工中，为了避免飞刀加工蜗轮过程中可能出现的加工抗刀现象并保证蜗轮齿面的加工质量，必须控制飞刀左右侧刃的实际工作后角不致过小。文章在理论分析的基础上给出了当飞刀径向进给粗加工蜗轮时飞刀左右侧刃工作后角的计算方法，并用实际算例进行了验证。     

螺杆压缩机转子成形砂轮刃形计算

针对给出任意转子型线时转子齿面加工的成形砂轮刃形设计,利用螺杆转子加工过程中转子和砂轮的相对位置关系,通过对转子型线坐标系的旋转变换,建立空间转子坐标系和成形砂轮坐标系之间的几何映射关系;基于啮合原理,建立转子齿面与成形砂轮的接触线方程,并给出解析和离散两种转子型线表达方式的刃形求解方法。在此基础上,根据转子砂轮之间的设计间隙,通过对接触线沿转子齿面法向进行偏置,获得了修整后的砂轮等距齿面刃形,避免了传统修整方法导致的法向齿间间隙不均等问题。加工结果表明,该方法能够满足螺杆转子的加工精度要求,是一种有效的螺杆转子齿面成形砂轮的刃形设计方法,并可推广应用于其他螺旋面成形砂轮或盘形铣刀的刃形设计。     

A precision grinding method for screw rotors using CBN grinding wheel

Aiming at the high precision machining of screw rotors, a new grinding method for screw rotors using cubic boron nitride (CBN) grinding wheel is presented in this paper. Small electroplated CBN grinding wheel is firstly used to grind screw rotors. The mathematical model for the axial profiles of CBN grinding wheel is developed based on gear engagement theory. Taking the backlash of screw rotors and the coating thickness of CBN layer into consideration, the modification of the base body of the wheel shape is introduced into the design of the CBN grinding wheel. Wire cut electrical discharge machining low speed (WEDM-LS) was used to machine the base body of the CBN grinding wheel. The formed turning tools of the base body of CBN grinding wheel using WEDM-LS and the wheel shapes of CBN grinding wheel using the formed turning tool were performed. The CBN grinding wheels for the screw rotors were made to verify the validity and effectiveness of the presented method. The electroplated CBN grinding wheels were used to machine the screw rotors, and the machining experiments were performed. The data obtained in the experiments reach the fifth class of Chinese Standard GB10095-88.     

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.     

超精密平面研磨加工速度对精度的影响

为了提高加工精度和减少研磨轮磨损,对研磨加工过程中的加工参数进行分析.针对目前常用的两种不同结构砂轮(放射线研磨轮以及螺旋线研磨轮),采用加工精度系数和砂轮磨损系数的概念描述加工精度与砂轮磨损,并提出相应的数学模型,以分析加工参数与工件精度及研磨轮磨损的关系.着重探讨了研磨轮与工件相对速度变化对加工精度的影响.通过理论分析与实践表明:优化设计砂轮的结构、合理选择加工参数,可以实现提高研磨加工精度及降低砂轮磨损的目的.     

RESEARCH ON PARALLEL GRINDING METHOD OF NON-AXlSYMMETRIC ASPHERIC LENS

In order to resolve the problems of machining non-axisymmetric aspheric lens,which is short of flexibility in mould grinding and needs high accuracy CNC machine center in globe diamond wheel grinding,a new parallel grinding method that utilizes common arc diamond wheel is put forward.Base on the approach calculation of machining locus,the advantages of parallel grinding that machines non-axisymmetric aspheric lens by 2.5-axis CNC machine center have been obtained.The results of grinding experiment show the new method can meet the need of grinding high accuracy non-axisymmetric aspheric lens.     

砂轮磨损状态的声发射检测及其误差补偿方法的研究

砂轮磨损会破坏砂轮型面，对加工精度有重要影响。利用声发射方法检测砂轮的磨损状态以及修整过程，并提出了实现砂轮磨损误差在线补偿的方法。     

基于驾驭式虚拟加工的平面二次包络蜗杆实体造型

介绍了在VBA环境下，运用虚拟加工技术开发机械零件三维实体造型的实现机制和关键技术，通过引入驾驭式控制方式实现了对仿真过程的实时控制，并通过平面二次包络环面蜗轮副实体造型程序实例，阐述了三维驾驭式实体造型的设计方法。为该型蜗轮的数控加工提供合适的数学模型及相应的CAD数据接口，达到蜗轮数字化造型的目的。