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Car: Powertrain

  发动机和变速器是动力总成的主要组成,是整个汽车部件中最为重要也最为复杂的部分,相当于心脏之与人体。因此,规划完善的动力总成测量解决方案对于保证动力总成乃至整车的品质和性能至关重要。面向动力总成领域的测量,一般来说,呈现出如下特点:
  精度要求高
  测量频率高
  装夹定位重复性、快速性
  温度的变化控制
  数据处理:cg&cgk、GR&R
  测量难点之一:阀座的测量
  总成的主要组成部件基本上分为缸体、缸盖、曲轴、凸轮轴、活塞、连杆、进气歧管、排气歧管。其中又以缸体缸盖等箱体类工件的测量项目为多。动力总成的检测方案围绕评价这个核心展开,必须综合考虑影响评价结果的所有因素:装夹、测针、测量机、温度、测量的位置、测量点数、测量速度……一般来说,面向动力总成的测量,包括了在线型和计量室型两种检测方案。
  在线型测量方案:
  通过抽检的方式对高节奏大批量动力总成零部件的制造质量在线监控,并在生产线验收、设备能力验证以及配合各种生产调整中发挥着重要的作用。采用GlobalSilver系列测量机的现场在线型动力总成检测解决方案受到用户青睐。该方案特点为:高精度,匹配动力总成生产节拍的高效率,整合高效定位夹具、上下料和集成易操作的机柜系统;采用适应车间环境的防尘控温机罩、机器温度补偿技术、车间现场安全防护技术和无间断运行性能等。
  针对动力总成大批量生产线加工趋势的实时监控,在动力总成加工工艺中加入m&h在机测量环节,通过在机自动找正工装夹具并据此自动补偿加工参数,同时,对刀具在机检测并补偿磨损值,不但提升了加工过程的工序质量,还有效避免不良加工趋势。
  计量室型测量方案:
  研发阶段以及产品认可阶段的最高评测需要更严格的质量检测和分析。高性能的Leitz系列超高精度测量机和齿轮测量中心,除了能够完成标准几何量的测量(如缸体、齿轮箱等等),同时还可以实现对任何特殊几何形状工件的测量任务,如凸轮轴、涡轮、螺旋压缩机转子等,Leitz测量机还可以完成一些标准量检具的校准认定任务,这使得Leitz超高精度测量机在全球范围内成为动力总成制造企业的首选。
  动力总成上面有许多旋转轴类零部件,如气门、发动机主轴、制动系统、燃料喷射系统等,该类零部件检测尺寸较小,以轴上各段直径、角度跳动、沟槽宽度、圆角大小为主。集多种光电测量系统功能于一身的TESASCAN轴类零件检测仪专门用于回转体零件的非接触测量,实现测量尺寸从0.25mm-80mm,长度可达500mm的轴类零件的外径、圆度、跳动、同轴度、长度、角度、R圆弧以及螺纹等的高速、高精度测量。
  基于动力总成用户严格、系统的测量需要,测量厂家往往需要通过交钥匙的方式实现整个测量系统的提供,从而更好的实现资源的整合与优化利用,确保测量与响应的动力总成检测相适应。一般来说,一个交钥匙项目的实现需要从测量的技术咨询、准确理解测量任务、规划与匹配测量机型、进行测量间的设计、选定测量程序、编制零件检测程序、定制工件专用夹具和上下料系统以及进行操作培训等众多方面开展。这其中,海克斯康积累了大量的经验,并在全球为诸多知名的动力总成制造商提供并实施了系统的动力总成交钥匙方案。
  欢迎联系和咨询我们的汽车行业专家,获取面向动力总成的测量解决方案的详细信息。
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