轴承座零件螺孔数控加工夹具的设计

针对轴承座端面螺孔加工时,夹具结构复杂、灵活性差、操作强度大和自动化程度低的缺点,分析确定了轴承座螺孔的数控加工方案,介绍了工件的定位和夹紧,设计了可调的夹具结构。实践证明,该夹具能降低工人劳动强度,提高加工效率,保证螺孔的加工精度,它还适用于一定范围内的不同规格轴承座上螺孔的加工。这对类似零件端面螺孔加工的夹具设计具有借鉴意义。     

弹性夹具在双轴承座中的应用

我公司生产的某车型的取力传动总成中使用双轴承座,如图1所示。在产品加工的过程中,需要注意的是双轴承座两端的同轴度和两端面与轴承座轴线的垂直度。原工艺中此工序使用卧式镗床加工,虽然两轴承座外圈的同轴度精度保证了,但效率相对偏低,为此我们制造了一套精车轴承座外圈和双轴承座端面的夹具,即弹性夹具。下面主要介绍一下此弹性夹具的设计原理、使用方法和注意事项。     

轴承座夹具设计及应用研究

针对某轴承座的薄壁箱体结构在装夹和松开过程中的变形,设计了一套精车轴承座两端内孔和轴承座端面的车床夹具,该夹具机构简单,实现了轴承座两端内孔同轴度、垂直度在0.01mm内的加工精度要求。     

石材切割机主轴轴承座的车夹具设计

石材切割机主轴轴承座底孔的精加工效率很低,而且占用了昂贵的精密镗床的加工时间,很不经济。通过设计车夹具来加工轴承座底孔,实现用车床代替精密镗床的加工,大大提高了轴承座的加工效率,企业的经济效益得到了显著的提高。     

磨粉机电气控制系统的设计实现

针对小麦磨粉机在设计和使用当中的关键点,对磨粉机的电气控制系统进行了设计.重点针对磨粉机的自动喂料系统和磨辊轧距自动调节系统.对电气控制系统中的物料高度测量、电动机控制、磨辊轧距测量、磨辊吸收功率测量和控制等关键问题进行了阐述.     

数字化车间的混流成线加工技术研究

本文介绍了数字化加工车间生产线布置方案的规划过程,重点论述了以数控机床滚珠丝杠轴承座类零件为加工对象的混流成线加工工艺的设计过程,针对该类零件的结构特征,设计了专用工艺装备作为混流成线加工过程中使用的随行夹具.本文研究的数控机床滚珠丝杠轴承座类零件混流成线加工技术将作为后续数字化车间建设工作的技术支撑.     

出口合金钢工作辊轴承座的加工技术

介绍材质为ZG34CrNiMo的工作辊轴承座的加工难点及在工艺和管理上采取的措施.     

磨辊合理动平衡精度问题的探讨

在研究了磨粉机辊间压力导致的磨辊变形和不平衡力导致的磨辊变形的基础上,提出了确定磨辊动平衡精度等级的基本原则,给出了大、中、小型磨粉机磨辊合理动平衡精度等级的参考值.     

关于加工轴承座工装夹具的改进

关于加工轴承座工装夹具的改进倪秀琴（鞍山市风机二厂）通风机运转是否灵活稳定，同轴度好与坏和轴承座的加工质量密切相关。Ω型轴承座如图１所示。以往轴承座均夹在一台Ｃ６１３３０车床上，采用夹盘夹紧找正，装夹困图１轴承座难，劳动强度大。为了提高效益，减轻工人...     

轴承座零件批量生产的加工工艺分析

对于规格小、要求精度高的轴承座零件的加工,如果要在三轴加工中心实现批量生产,须解决装夹及定位问题。现针对轴承座零件的批量生产,设计了一种专用夹具进行加工,从而提高其生产效率。     

Natural frequencies of vibration of a class of solids composed of layers of isotropic materials

In a recent paper, the Ritz method with simple algebraic polynomials as trial functions was used to obtain an eigenvalue equation for the free vibration of a class of homogeneous solids with cavities. The method presented is here extended to the study of a class of non-homogeneous solids, in which each solid is composed of a number of isotropic layers with different material properties. The Cartesian coordinate system is used to describe the geometry of the solid which is modelled by means of a segment bounded by the yz, zx and xy orthogonal coordinate planes and by two curved surfaces which are defined by fairly general polynomial expressions in the coordinates x, y and z. The surface representing the interface between two material layers in the solid is also described by a polynomial expression in the coordinates x, y and z. In order to demonstrate the accuracy of the approach, natural frequencies are given for both a two- and three-layered spherical shell and for a homogeneous hollow cylinder, as computed using the present approach, and are compared with those obtained using an exact solution. Results are then given for a number of two- and three-layered cylinders and, to demonstrate the versatility of the approach, natural frequencies are given for a five-layered cantilevered beam with a central circular hole as well as for a number of composite solids of more general shape.     

某型号飞机起落架支柱减振筒内壁腐蚀原因分析

飞机起落架减振支柱在飞机起落和滑跑时,吸收撞击能量,对飞机安全起降的意义重大.减振筒是减振支柱中的重要部件,本文从工艺流程、理化分析、外场使用和腐蚀机理分析等方面,对减振支柱减振筒内壁的腐蚀原因及危害进行了综合分析,并提出了相应措施.     

叶切面最大厚度数值计算与应用

以叶切面最大厚度的数值计算方法为基础,探讨叶切面最大厚度计算的计算机实现,介绍叶切面厚度数值计算法的应用实例.     

膨胀套导向机构的设计

通过分析膨胀套在实际使用产生滑移受阻现象、卡死现象原因的实质,并在分析产生问题原因的基础上提出了改进措施即：增加导向机构。     

双丝杠驱动机构同步分析

介绍了双丝杠驱动机构工作原理,论述了双丝杠运动产生不同步的原因以及如何判定与解决同步问题。     

我校工业设计教育改革初探

针对目前市场对工业设计人才的需求,本文论述了我校在工业设计教育方面的改革措施,着重介绍了我校工业设计教育在软件和硬件方面所进行的一系列的改革。     

两种仪表功能合理性评述

本文以某些积算和双笔记录仪产品为例说明由于仪表功能设计的不合理或选型不当，影响了仪表的正常使用，制造厂和用户应关注这类问题。     

串联混合动力牵引车蓄电池SOC的监测

文中提出了基于安时法计算混合动力电动牵引车蓄电池已用电量，在求出当前蓄电池荷电状态的基础上，利用根据能量守恒模型计算出的蓄电池SOC进行荷电状态校正，采用80C196KC加上相应的感应器来实现。实验表明，该方法测出的蓄电池荷电状态比较准确，有较高的精度。     

Effect of Impregnation of Iodine Complex on Friction of Anodic Oxide of Aluminum

Polyvinyl pyrrolidone-Iodine complex (PVP-I) molecules were impregnated into the anodic oxide of an aluminum disk specimen. It was rubbed against a silicon nitride ball specimen using a ball-on-disk type friction test rig. Over the limited range of parameters studied (load: 0.2-1.0 N, sliding velocity: 0.6 mm/s, and sliding distance: 1-7 m), the coefficient of friction decreased to a value as low as 0.01 from values of 0.3 to 0.7 for the anodic oxide surface. Single-crystal iodine rubbed against silicon nitride showed a coefficient of friction of 0.1. The low coefficient of friction is attributed to the thin PVP-I film on the relatively hard anodic oxide. The mechanism of coefficient of friction reduction is the same as that of a thin soft film on a hard substrate.     

Modeling of coefficient of contraction of differential pressure flowmeters

The article provides a solution to the problem of contraction process modeling when measuring the flow of fluids and gases using differential pressure flowmeters. The article shows the feasibility of obtaining the coefficient of contraction from the mathematical model of the reduced/contracted flow of fluids or gases. An analytical expression is obtained for the coefficient of contraction, which agrees well with the results of the experiment. Analysis of this expression is performed and dependencies on the geometrical parameters of the pipeline and orifice plate are obtained.