Wiring Harness Perforation and Rubber Sheath Installation
When the wire harness passes through the hole, a common mistake is that the size of the through hole only considers the thickness of the wire harness, while ignoring that the connectors on the wire harness also need to pass through the hole. This is a very simple logic, but it is often made by beginners. mistake.
The opening of the sheet metal is not a random point. It is necessary to consider the process of opening the sheet metal and the requirements for the sheet metal hole during the installation of the wire harness rubber sheath. Generally speaking, there are the following requirements:
● The diameter of the connector with the largest outer envelope diameter must be smaller than the diameter of the sheet metal hole. The usual requirement is that the sheet metal hole diameter is at least 3 times the maximum size of the connector. This requirement also applies to when the wire harness passes through a closed cavity, such as the inner and outer panels of the tailgate, the cavity between the inner and outer panels of the side panel, etc. In the direction of the wire harness passing path, the diameter of the cavity space section is greater than 1.3 times that of the connector.
● The size of the via hole corresponding to the rubber part and the thickness of the material are correct, and the interference between the diameter of the rubber part and the sheet metal part is greater than 1mm and less than 2mm;
● The sheet metal surface along the radius of the hole greater than 6mm of the blocked hole must be smooth to ensure airtightness.