First, the forging factory forging workshop is connected to the power supply. After starting the air hammer, the upper and lower rotary valves are operated by the handle or the foot lever, so that the air hammer can realize the four actions of idling, hammer suspension, continuous strike and single strike to adapt. Various forgings are required for processing.
(1) idling (empty stroke) When the upper and lower valve operating handles are in the vertical position, and the middle valve operating handle is in the "empty-travel" position, the upper and lower chambers of the compression cylinder are directly connected to the atmosphere, and the pressure becomes uniform, since there is no Compressed air enters the working cylinder, so the hammer does not work.
(2) Hammer head suspension When the upper and lower valve operating handles are in the vertical position, when the middle valve operating handle is turned from the "empty" position to the "working" position, the upper chamber of the working cylinder and the compression cylinder are open to the atmosphere. At this time, the compression piston is ascending, and the compressed air enters the atmosphere; the compression piston descends, and the compressed air is opened by the air chamber to open the stop valve into the lower chamber of the working cylinder, so that the hammer head rises and is placed in the floating position.
(3) Continuous strike (tap or replay) When the middle valve handle is in the "working" position, the upper and lower valve actuation handles (or pedal levers) are driven to rotate counterclockwise to make the upper and lower chambers of the compression cylinder The upper and lower chambers of the working cylinder are connected to each other. When the compression piston moves downward or upward, the compressed air of the lower chamber or the upper chamber of the compression cylinder is correspondingly inserted into the lower chamber or the upper chamber of the working cylinder, and the hammer is lifted or dropped. In this cycle, the hammer produces a continuous blow. The amount of energy for hitting forgings depends on the angle of rotation of the upper and lower valves. The greater the angle of rotation, the greater the energy of the forging.
(4) A single strike is achieved by changing the operating position of the joystick. Before the single forging strike begins, the hammer is in the suspended position of the hammer (ie the middle valve joystick is in the "working" position and then the upper and lower valve joysticks are rapidly rotated from the vertical position to the counterclockwise position to a certain position. Go to the original vertical position (or change the position of the foot lever accordingly) and you will get a single hit. The amount of the hit energy varies with the angle of rotation, turning to 45. A single hit energy.
If the handle or pedal is held in an inclined position (rotation angle < 45°), the hammer strikes continuously. Therefore, a single strike is actually a special case of continuous combat forgings.