专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US3807207A Method and apparatus for effecting a controlled reduction in the cross-section of a tubular electric heater 失效
标题翻译：用于在管状电加热器的交叉部分中进行控制减少的方法和装置
公开(公告)号：US3807207A
公开(公告)日：1974-04-30
申请号：US27082272
申请日：1972-07-11
申请人： OBDRZALEK S
发明人： OBDRZALEK S
IPC分类号： B21B23/00 , H01B13/004 , H05B3/48 , B21B37/00
CPC分类号： H05B3/48 , B21B23/00 , H01B13/004
摘要： The invention provides a method and apparatus for use in the manufacture of tubular electric heaters, wherein a heater element is embedded in a tube in a powdered insulating material, and the cross-section of the tube is thereafter reduced and the insulating material is compressed by hammering around the tube, rolling, or the like, thereby causing an increase in length of the tube. To ensure a final desired nominal length of tube, the length of the tube is sensed during the rolling or hammering operation, at a stage in production when the length of the tube lies below or at the desired nominal length. Any further reduction in cross-section of the tube is controlled in accordance with the length so sensed and in a stepless variable manner so that the tube is of the desired nominal length when the hammering or rolling step is concluded.
摘要翻译：本发明提供了一种用于制造管状电加热器的方法和装置，其中加热器元件嵌入管中的粉末绝缘材料中，然后减小管的横截面，并且绝缘材料被压缩围绕管子，滚动等敲击，从而导致管子的长度增加。为了确保管的最终期望的标称长度，在轧制或锤击操作期间，当管的长度低于或期望的标称长度时，在生产阶段期间感测管的长度。根据所感测的长度和以无级变量的方式控制管的横截面的任何进一步减小，使得当锤击或滚动步骤结束时，管具有期望的标称长度。

IPRDB

热门服务

关于我们

友情链接

联系方式