六角螺栓车总长装置设计含NX三维及6张CAD图
收藏
资源目录
压缩包内文档预览：
编号：118098088
类型：共享资源
大小：6.13MB
格式：ZIP
上传时间：2021-03-19
上传人：QQ14****9609
认证信息
个人认证
郭**（实名认证）
陕西
IP属地：陕西
20
积分
- 关 键 词：
-
六角
螺栓
总长
装置
设计
NX
三维
CAD
- 资源描述：
-
六角螺栓车总长装置设计含NX三维及6张CAD图,六角,螺栓,总长,装置,设计,NX,三维,CAD
- 内容简介：
-
附录A外文文献及其翻译 COLLECT CHUCK1.IntroductionTo improve productivity in micro/meso-scale components,researchers have focused on developing miniaturized manufacturing instruments,such as micro-machine tools.These miniaturized systems are expected to save energy and be easily reconfigurable.The first step in micro-manufacturing instruments is miniaturizing the corresponding subsystems.In particular,micro-machine tools for material-removal processes have,as a key subsystem,a micro-spindle unit that must achieve high rotational speeds while maintaining good rotational accuracy for micro-feature machining.In developing micro-spindle units,a critical problem is miniaturization of the tool-clamping part that holds the tool in the spindle.Approaches for scaling down conventional tool clamps,such as the collet-chuck,hydraulic chuck,and shrink-fit methods,may be limited by their inherently complicated structural and operational mechanisms.In collet-chucks,a tapered collet and collet-pulling device,such as a spring and a screw,must be included in the micro-spindle.In addition,a tapered collet causes tolerance stackup,which may increase rotation error motion.Hydraulic chucks have a non-axisymmetric structure inside the spindle due to the need for an adjusting screw and oil paths.These elements unbalance the rotor mass, increasing rotation error motion at high-speed revolution.Finally, shrink-fit tool holders require specific equipment to heat the device to a high temperature to unclamp a tool,equipment that is too expensive and too large for use with micro-machine tools.One possible way to avoid these problems is to incorporate a shape memory alloy(SMA).SMAs have recently been used in various applications,such as actuators,fasteners,bone fixaters, and so on713.They are lightweight,allow easy and precise installation,yield excellent reliability,and provide good immunity against shock and vibration.By employing SMA for a tool clamp, the clamp can be simplified because the SMA directly provides the radial tool-clamping force on the tool holder.Due to this simple structure,further miniaturization is possible,so it has an advantage of good immunity against the effect of centrifugal force.In addition,unlike a collet-chuck,an SMA-based tool clamp does not require a collet to develop clamping force;this eliminates the tolerance stackup that results from the collet.The SMA-based device also has an axisymmetric structural configuration,unlike a hydraulic chuck,which minimizes the effect of mass unbalance.Finally,the tool clamp can switch between the clamped and unclamped states by using a simple device toregulate small changes in temperature,thereby eliminating the need for the expensive heating equipment used in shrink-fit mechanisms.In this study,we developed a tool clamp based on SMA for applications in micro-spindle units.First,we developed the basic configuration of the tool clamp using an SMA ring,and described the principle of clamping/unclamping the tool mathematically.Second,we conducted three-dimensional(3D)finite element method(FEM)analyses to assess the characteristics of the clamping/unclamping operations and the effect of centrifugal force.Next,we designed and built a prototype of the SMA-based tool clamp.Then,we experimentally evaluated the time needed for clamping/unclamping operations and the tool-clamping force.Finally,we used the prototype to conduct a mill-machining test to confirm that it was unaffected by centrifugal force at high rotational speeds.2.Principle2.1.Shape memory alloysSMAs are a unique class of alloys that are characterized by the shape memory effect.An SMA that is deformed in a low-temperature phase,called the martensitic phase,can recover its original shape upon heating to the reverse transformation temperature,where the SMA enters the austenitic phase.If the SMA is impeded by an external mechanical structure as it is returning to its original shape,recovery stressesare generated.The relationships between stresses and strains in SMA materials are a function of temperature15.In the low-temperature phase,SMAs have a smaller Youngs modulus and yield strength than at higher temperatures.That is,SMAs in the martensitic phase are more easily deformed elastically or plastically than those in the austenitic phase.Thus,an SMAs recovery stress can be adjusted by controlling temperature.Based on these phenomena,an SMA can be used in a tool clamp.2.2.ConfigurationFig.1 shows the structural configuration of our SMA-based tool clamp.It consists of only two parts:a tool holder in the end of thespindle,and a closed SMA ring.The tool holder has a central hole in which a tool is installed,and four lateral slots.The SMA ring is placed around the outside of the tool holder.The location of this ring is determined by the surface boundary between the different diameters of the components of the tool holder,so the clamping force of the SMA ring can be provided in the desired location and direction.It is important that the SMA-based tool clamp can not only clamp the tool but also unclamp whenever a tool change is required.To achieve clamping/unclamping,an interference-fit between the tool holder and the SMA ring was developed.This interference-fit constrains the recovery of the SMA ring,resulting in a recovery stress,so that a recovery force acts on the tool holder.When the SMA is in the austenitic phase,the tool hole is further shrunk by the recovery force.However,when the SMA is in the martensitic phase,the tool hole can return almost to its original shape through the elastic force of the tool holder,because in this phase the SMA has minimal recovery ability and is easily deformed by external forces.In other words,in the austenitic phase the SMA remains above its reverse transformation tem-perature,ensuring the tool remains clamped,and during the cooling procedure the tool unclamped in the tool holder can be installed or uninstalled.翻 译为了提高微/中尺度元件的生产力，研究人员专注于开发小型化生产工具，如微机械工具，这些小型化系统有望节省能源和易于识别文字.微制造工具的第一步是小型化相应的子系统.尤其是微机械材料，清除过程工具，作为一个关键子系统，一个微型主轴单元，必须达到较高的旋转速度，同时保持对微加工功能良好的旋转精度。 在发展微型主轴单元，一个关键问题是该工具夹紧部分保存在主轴方法的缩减，如传统的工具夹夹头，卡盘，液压卡盘，收缩后接的方法，工具，小型化，可能受到他们本身复杂的结构和运作机制.夹头，卡盘，一个锥形夹头及夹头拉设备，一个螺丝钉，都必须在微主轴里.此外，包括有限公司，锥形夹头的原因叠层宽容，这可能会增加旋转误差偏移.液压夹头主轴内有一个由于对一个调整螺丝和石油路线.这些元素不平衡转子的质量需要非轴对称结构，增加高旋转速度的革命运动误差。最后，收缩接刀柄需要特定的设备加热装置，高温下松开的工具，设备过于昂贵，对于微机械工具.一个使用的方式来避免这些问题太大，是把一个形状记忆合金（SMA）。形状记忆合金，最近在各种应用，如驱动器，紧固件，骨等7-13。它们是轻量级的，使用，允许安装方便，准确，产量出色的可靠性，并提供防冲击和雇用一个工具钳SMA的振动.通过良好免疫力，钳可以简化，因为直接提供了SMA径向工具钳的工具支撑.由于这个简单的结构受力，进一步小型化是可能的，因此它针对该离心力.优势除了免疫效果好，不像一个夹头，卡盘，一个SMA型工具钳不需要夹头夹紧力的发展，这消除了公差层叠，形状记忆合金基于设备还具有轴对称结构的配置，不同的是液压卡盘，能最大限度地降低质量效应不平衡.最后，工具钳钳夹之间可以松开开关状态通过使用简单的设备 调节温度的微小变化，从而省去了昂贵的取暖收缩适合机制.利用这一研究设备的需求，我们开发了一种工具钳形状记忆合金为基础的微主轴units.First应用，我们开发的基本配置使用的工具钳形状记忆合金环，并介绍了夹紧原则/松开工具机制.第二，我们进行了三维（3D）的有限元法（FEM）分析，评估的夹紧/松开业务特点和效果离心力.然后，我们设计并建立了形状记忆合金为基础的工具钳.原型，我们实验评估夹紧/松开操作和工具钳力.最后所需的时间，我们使用原型进行磨机械加工测试，以确认它是由高速旋转的速度在离心力的影响。 2.原理 2.1.形状记忆合金 形状记忆合金是一组由形状记忆合金形状记忆效应.一个是在低合金低温相变形的特点独特的类，称为马氏体相，加热后可以恢复到反向相变温度，形状记忆合金在进入其原来的形状奥氏体相.如果SMA是由外部的机械结构阻碍，因为它是返回到原来的形状，恢复压力和生产之间的关系，形状记忆合金材料的应力和应变是温度的函数15。在低温阶段，形状记忆合金具有较小的弹性模量和屈服强度比在较高温度.也就是，在形状记忆合金马氏体相更容易变形弹性或塑性高于奥氏体.因此，一个形状记忆合金的回复应力可以调整通过控制这些现象，基于这些现象，SMA可以用在工具钳上。 2.2.配置 图1给出了我们的形状记忆合金为基础的工具.结构配置只有两部分组成：一个在年底刀架主轴， 一个封闭的形状记忆合金.刀架具有中孔的其中一个工具是安装，四侧插槽.形状记忆合金环是围绕着这个戒指工具支撑.。位置放置外表面的决定是由之间的刀架组件的不同直径的边界，所以形状记忆合金环的锁模力可在所需的位置和方向.提供重要的是形状记忆合金为基础的工具钳，不仅可以夹紧工具，但也松开每当更换刀具是为了实现夹紧/松开，干涉之间的刀柄与上肠系膜动脉环的衣服合身发展.干扰配合制约了形状记忆合金环的复苏，在经济复苏造成压力，使经济复苏在工具支撑.当形状记忆合金在奥氏体相武力行为，该工具洞是进一步缩小了恢复力.然而，当SMA的马氏体相是，该工具几乎可以返回孔其原来的形状，通过弹性力的刀架，因为在这个阶段的形状记忆合金具有最小的恢复能力，很容易变形外部力.换句话说，在形状记忆合金相奥氏体逆相变温度高于其仍然- 温度，确保该工具仍然夹紧，并在冷却过程中的刀架松开该工具可以安装或卸载。 朗读显示对应的拉丁字符的拼音字典附录B 参考文献【1】 杨兰春.弹簧夹头加工工艺的改进探讨.摘要：每一种加工方法都不是万能的、完美无缺的，都各有利弊，应从需要和可能出发，从经济、实用、有效、可靠的角度出发选择最佳的结构设计方法，弹簧夹头在加工中存在着一些缺陷，在弹簧夹头加工的过程中，如何更好的改进弹簧夹头，本文在此对夹头体典型制造工艺及保证措施进行了研究。关键词：弹簧夹头；加工工艺；改进【2】 王文超.弹簧夹头性能研究与改进探讨.摘要:针对65Mn钢制弹簧夹头使用寿命较短问题,采用改进热处理工艺及更换新型材料GCr15钢制作弹簧夹头。对比试验结果表明,改进热处理工艺对提高弹簧夹头使用寿命效果不明显,而选用新型材料GCr15钢及规范的热处理工艺制作弹簧夹头,其力学性能及使用寿命均能显著提高,从而可以提高生产效率与产能。关键词:弹簧夹头；局部回火；显微组织；力学性能【3】 祁宏志.弹簧夹头的热处理工艺.摘要:弹簧夹头的使用性能,除了结构设计和机加工工艺等方面因素外,热处理是一个较关键的因素,文中分析了弹簧夹头的材料及热处理的工艺性,并且重点分析了热处理工艺规程和机加工的关键工序。关键词:材料；工序；热处理；弹簧夹头【4】 刘铁成.提高弹簧夹头精度探析.摘要：在改善机床用弹簧夹头的夹紧精度和刚度方面,作了一些探讨,得到了一些技术参数；关键词：弹簧夹头；精度；刚度【5】 CNC COLLET CHUCKSAbstract：The article evaluates several machineries including computer numerical control (CNC) collet chucks from the company, Royal Products, TE six-jaw chucks from SMW Autoblok Corp., and Triag 5axesClamp from Advanced Machine & Engineering Co.【6】 Deburring of burrs in spring collets by abrasive flow machiningAbstract：Micro burrs occurring inside the small and large diameters adversely affect the properties of products. Manual deburring of micro burrs i
- 温馨提示:
1: 本站所有资源如无特殊说明，都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
2: 本站的文档不包含任何第三方提供的附件图纸等，如果需要附件，请联系上传者。文件的所有权益归上传用户所有。
3.本站RAR压缩包中若带图纸，网页内容里面会有图纸预览，若没有图纸预览就没有图纸。
4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
5. 人人文库网仅提供信息存储空间，仅对用户上传内容的表现方式做保护处理，对用户上传分享的文档内容本身不做任何修改或编辑，并不能对任何下载内容负责。
6. 下载文件中如有侵权或不适当内容，请与我们联系，我们立即纠正。
7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。
人人文库网所有资源均是用户自行上传分享，仅供网友学习交流，未经上传用户书面授权，请勿作他用。
川公网安备: 51019002004831号