HYDRAULIC CLAMPING DEVICE MECHANISM OF A BUTT WELDER

When pedal 1 is depressed, piston 2 moves downward and fluid under pressure is delivered through check valves 3 and 4 and pipeline 5 to servomotor 6. At this, piston 7 moves downward and plunger 8 with a welding die descends onto the contact heads, located on the base of the clamping devices. When pedal 9 is depressed, piston 10, of smaller diameter than piston 2, moves downward, delivering fluid …