虚拟量规检测孔位置度技术

通过分析孔位置度的综合量规检测法和三坐标测量法的优缺点,提出虚拟量规检测孔位置度方法。利用微粒群算法为虚拟量规寻找最恰当的对准位置,并通过可视化显示出测量点与虚拟量规的配合状态。此方法集成了综合量规检测法和三坐标测量法二者的优点,既能够达到综合量规对孔位置度的最佳评定准确率,又能够准确形象地反映不合格产品的缺陷点。     

矩形花键综合量规设计

矩形花键工作表面(外径、内径和键宽)的形位误差影响花键配合的互换性,是由花键综合量规检测的。本文仅就矩形花键综合量规设计作一些探讨。一、矩形花键综合量规基本尺寸的确定至今仍无花键量规国家标准,我们分析了矩形花键公差与配合国家标准GB1144-74,并参考了长春第一汽车制造厂编写的《量规设计手册》及苏联有关资料,结合我厂近年来引进英国安德森公司矩形花键     

机油泵泵体偏心量检具

过去检测转子机油泵泵体偏心,一直用偏心综合量规,由于量规与泵轴孔及转子腔之间存在间隙,再加之综合量规的制造误差,所以只能测出泵体偏心的近似相对值。而我厂设计的泵体偏心检具解决了这一问题。     

位置度的晃动测量

位置度测量的常规方法是使用综合量规进行的。综合量规虽然可以检验工件是否合格，但不直观，不利于在加工中进行控制，而且有的工件也无法用综合量规进行检验。本文结合机用虎钳钳身两项位置度的检验实例，介绍用晃动法检验位置度。机用虎钳钳身的各种技术要求较多，其中有两项位置度要求（见图1）：钳身上两孔的中心连线（公共中心线）对钳身导轨上平面的位置度要求和两孔的中心连线对钳身导轨两侧面的对称中心面的位置度要求。从图1可以看出，大孔（必36）在钳口一侧，如果使用综合量规一定从大孔一端插入量棒，但是钳口宽度大于导轨宽度…     

螺纹量规的数字化检测方法

螺纹量规是判定螺纹紧固件合格与否的重要量具,其几何参数的精确测量具有重要意义。利用螺纹综合测量仪完成了螺纹量规的数字化测量试验,分析得出该方法的测量结果准确,精度可靠。同时对螺纹综合测量仪测量中径的不确定度进行了评定,为螺纹量规的测量质量提供了参考依据。     

无锡爱锡量仪有限公司检测设备

爱锡量仪有限公司主要向用户提供以下类别产品：检测单元类产品：电感传感器,电子柱及其功能模块,气／电转换器,智能仪,计算机辅助测量仪。量规类产品：尺寸、位置功能量规（光滑环塞规、螺纹塞规、卡板、样板、深度规、孔距规及各种专用功能量规）,各种气动量规,各种表式量规,各种电子量规。检具类产品：各种尺寸类检具、孔距、孔位槽位检具、平面、球面位置检具等。多参数综合检测仪类产品：连杆综合检测仪,曲轴综合检测仪,活塞综合检测仪,轴类零件综合检测仪,缸体类零件综合检测仪等。一、电感传感器爱锡量仪公司生产的ＭＤＴ…     

径向定心矩形花键量规工作尺寸设计初探

本文根据矩形花键量规检测原理,在对花键及量规工作尺寸综合公差分析的基础上,提出了矩形花键量规工作尺寸设计的两点原则,并提出了有关尺寸公差取值及公差分配的一些参考数据,对径向定心矩形花键量规工作尺寸设计总是作了初步探讨.     

对ISO 8015和ISO 2692的修改建议

“相关要求”是为了保证孔轴的装配要求而提出来的一种设计要求，即限制孔轴作用尺寸的要求。根据“边界控制检测原则”，应该用综合量规来检验被测孔轴的作用尺寸是否满足相关要求。“相关要求”和“综合量规检验”是相依相存不可或缺的。     

矩形花键量规CAD

一、矩形花键量规设计特点矩形花键联结按定心方式不同，可分为花键内径和键侧面定心、花键外径和键侧面定心、仅键侧面定心三种。花键联结定心方式的不同并不影响量规的结构，所变化的仅是量规的工作尺寸和公差。按检验的项目不同，量规有多种。每种量规都有其典型结构。随着测量工件尺寸的变化，有些种类量规的结构形式变化，但大部分结构不变仅结构参数变化。量规的工作尺寸和公差根据被测工件参数计算而得。二、软件总体设计根据量规设计特点，软件应实现如下功能：1．资料检索：根据量规分类、编号，能够查询量规日号、用于何种产品、…     

花键量规的设计

在成批生产中,对直齿花花键连接件的检查,一般是采用单独式的界限量规和综合式的花键量规。 检查在键轴的单独式量规如图1及2所示。图1为检查键宽用的,图2为检查内径的。用单独式量规检查合格后,再用图3所示的综合式的花键环规来进行花键各部位的综合检查,以保证花键轴孔的互换性。 单独检查花键轴外径、内径和键宽的量规,在设计时,其公差和OCT光滑圆柱量规公差相同。但设计综合式量规时的尺寸的决定方法则不同。我厂是根据苏联资料设计的,使用效果颇好。现将该设计的尺寸计算方法介绍如下(图3及4)。 (1)花键以外径(D)定心: 当DA最小-DB…     

Experimental and theoretical evaluation of a high-accuracy uni-axial creep testpiece with slit extensometer ridges

The paper evaluates a previous uni-axial creep testpiece design which has slitted extensometer ridges to relieve the constraint to axial deformation provided by conventional, or unslitted, ridges. The results of experiments are reported on slitted and unslitted ridged testpieces; and they are used together with theoretical studies to evaluate the effectiveness of the slitted ridged testpiece design for different specimen gauge lengths. Firstly, the test results are used to derive true constitutive equations (i.e. those equations for testpieces without ridges), these are then used to predict the response of the majority of the testpieces, using the creep Continuum Damage Mechanics (CDM) Finite Element solver DAMAGE XX. The creep rupture mechanisms, lifetimes and accuracy of the measured creep strains have been determined theoretically for testpieces with unslitted and slitted extensometer ridges and gauge lengths of 50, 30 and 10 mm. Close agreement has been obtained between the experimental and theoretical results for the creep failure mode and lifetimes. It has been shown how the accuracy of the creep behaviour measured using short gauge length testpieces (10 mm), of the type used in tension-compression testing, may be greatly improved by using slitted extensometer ridges.     

液压辊缝控制系统的液压刚度分析及背压选择

该文根据液压辊缝控制系统工作原理,建立了辊缝控制的液压刚度模型。重点分析了油液弹性模量和背压对液压刚度的影响关系,给出了负载变化产生压力冲击的估算方法。最后结合一起典型故障的处理,阐明合理选择背压的重要性和选择方法的具体应用。     

Experimental measurement of gear mesh stiffness of cracked spur gear by strain gauge technique

In this paper, an experimental technique based on strain gauge has been proposed to measure the gear mesh stiffness of healthy spur gear as well as of cracked spur gear pair system. Calculation of mesh stiffness of healthy and cracked spur gear tooth are based on strain energy and strain energy release rate respectively. The location of strain gauge plays an important role in calculation of strain energy stored in gear tooth. The locations of strain gauge on gear tooth are illustrated for healthy and cracked gear. Stress intensity factor (SIF) has been calculated by strain gauge technique for calculating the stiffness of cracked pinion tooth. The effect of crack length on mesh stiffness has been investigated by strain gauge technique and results are compared with the established analytical method.     

步距规使用方法改进

2010年7月工信部首次发布了步距规的国家标准《JB/T10977-2010》。2010年9月国家质监局又发布了步距规校准规范《JJF1258-2010》。本文针对这一新产品的结构材料与使用中存在的测量范围小、受温度限制等缺陷进行了深入分析与研究,总结出克服缺点的方法,开拓了步距规的使用范围,并通过温度补偿值提高了检测精度。对机床检测机构与数控机床制造和使用单位均有很大的应用价值。     

基于DSP的光纤法珀应变仪数据采集技术研究

光纤法珀应变传感是20世纪80年代末发展起来的一种新型应变测量技术。相应的应变测量仪逐渐成为国内外研究的热点。针对现有的应变测量仪，提出了基于DSP的一体化光纤法珀应变仪的思路，对VC33与应变测量仪之间的数据采集进行了探讨，重点介绍了VC33与应变测量仪之间数据采集的硬件和软件设计，并做了采集验证实验。实验结果与理论上传感器的输出结果基本一致，验证了该采集技术的可行性，为后面的数据处理及实现一体化打下了良好的基础。     

基于DSP的光纤应变仪数据采集与处理软件设计

基于DSP的光纤应变仪完成了VC33与应变测量仪之间的数据采集和数据处理，在采集和处理的软件设计方面进行了深入探讨，做了等强度梁的加载实验。实验结果表明：应变随加载外力的变化曲线线性度较好，验证了该采集与处理方法及软件技术的可行性。     

Correction of the metrological properties of the pneumatic length measuring gauges through changes of the measuring nozzle head surface shape

In this paper, the geometry of the measuring nozzle head surface used in an air gauging system has been examined. The concept of conical correction of the surface in order to influence the metrological properties of the air gauge has been described. Geometrical correction has a substantial impact on the conditions of the outflow and the metrological properties of the air gauge. The outflow surfaces for a corrected nozzle have been calculated for different slots, and the transition point has been defined for the smallest outflow surface. The analysis of possible static characteristics enabled us to examine the influence of other parameters like inlet nozzle diameter or multiplication on the linearity. As a result of analysis, the method of the measuring head nozzle profile calculation has been presented. The experimental verification of the concept of conical surface correction in order to influence the metrological properties of an air gauge has been described. Dozens of corrected measuring nozzles have been manufactured and undergone experimental research. Comparative analysis of the static characteristics gained enabled us to examine the influence of other parameters such as inlet nozzle diameter or multiplication on the linearity and to contrast the results with the theoretical expectations.     

Pneumatic gauge steady-state modelling by theoretical and empirical methods

Pneumatic gauging involves the determination of estimates of dimensional deviations from measurement experiments using a valid gauge model. This paper surveys theoretic and empirical methods for high-pressure gauge modelling. Theoretic reasoning alone may provide a model wherein steady flows through gauge restrictors are described by means of the energy equations. However, in such model formulation, restrictor discharge coefficients are affected by a number of factors. So, for adequate steady-state modelling, it is essential to consider discharge coefficient variations at different flow rates and for different flow restrictors. With this concern an empirical method has been entertained which is based on empirical equations proposed by Nakayama. Nevertheless, the both surveyed methods have led to invalid gauge models. Therefore, a possible alternative for two considered methods of high-pressure gauge modelling may be connected with response surface methodology employment.     

利用非晶态合金进行平面应力磁测法的研究

基于铁磁材料压磁效应的应力测量是一种新技术。目前对该技术的研究重点是如何提高它的测试准确性和灵敏度。非晶态合金材料具有良好的磁特性，可以用于应力测量。文中对这种应变计的工作原理及其磁输出特性进行理论分析，并利用铁基非晶态合金薄带进行实测试验。试验结果显示，该方法具有测试灵敏度高、测试系统简单等特点，是一种很有发展前景的应力测试方法。     

The statistical gauge in geometrical verification. Part II. The virtual gauge and verification process

Currently, most measurement and geometrical verification processes are based on the characterization of distances or angles between geometrical elements. Methods have already been developed for the verification of ISO specifications using the statistical information included in a set of points. These methods are however based on the development of measurement sequences and hence a set of geometrical constructions. The main problem in this verification process is the propagation of uncertainties. With a correct expression of a virtual gauge, it is possible to avoid this propagation; indeed by using a virtual gauge manipulation, initial best-fitted surfaces are never altered. The aim of this paper is to present a new approach using this statistical information to describe the measured part and develop a virtual gauge system for verification. This has been done in two parts. The first one focused on the statistical modeling of the measured surface; this second part will now describe a verification method based on a virtual, i.e. numerical, gauge.