| 摘要 |
PURPOSE: To provide a die for forming an indentation on an earthing rod, and its method. CONSTITUTION: The die is a U-shaped die 16 used for liquid pressure compressing tool. The die has a general concave 19 and inner surface 20 which includes individual tooth protrusions 22 on multiple columns 24, 25, 26, 27, 28. The die is used to form multiple columns of individual tooth indentations on the outer surface of an earthing rod 32, and therefore a connector 34 is compressed onto the rod 32, connector part is transformed into the indentations 36, and the connector 34 is tightly connected to the rod 32. |
