| 摘要 |
Portable measuring instrument for checking the squeeze time in spot welding. The instrument comprises a measuring cell (1) designed to be inserted between a pair of welding electrodes. The measuring cell contains a wire strain bridge for measuring the clamping force between the welding electrodes and a pair of electrodes (5) in a voltage detector for indicating the turning on of the welding current. The measuring cell is connected electrically to an electronic unit with optical indicating means (9), e.g. an LED stack, which indicates the size of the clamping force when the welding current is turned on. The LED stack and the electronics are arranged in an apparatus casing (3). |
