PURPOSE: To control plate thickness more accurately, by calculating the plate thickness value of measuring reference basing on the fluctuation of plate thickness in at least one revolution of a roll, and ajusting a roll gap by comparing it with the standard plate thickness value.
CONSTITUTION: The latter roll of a pair of rolls 1, 2 having the same diameters respectively is supported in only a rotatable state by a machine frame of a press welding device, and the former one is supported in a rotatable and vertically movable state, and a mechanism 3 for adjusting the gap between both rolls is interlocked. Band plate materials 5, 6 are mutually press welded into a press welded material 7 between the rolls 1, 2, and the thickness of it is measured by a flying micrometer 8 to output its value to a microcomputer 10. On the other hand, a proximity sensor 11 detects that the roll 2 completes one revolution and inputs its signal to the computor 10. The computor 10 measures the fluctuations of the plate thickness while the roll 2 completes one revolution and calculates the plate thickness value of measuring reference, and controls a driving motor 4 of the mechanism 3 through a control panel 12 in accordance with the deviation of the calculated value from the standard plate thickness in order to control the gap between the rolls.
KAWAI TERUSADA
IWABORI YASUHITO
| JPS5414357A | 1979-02-02 |