In the measured scale, when the center of gravity of the pendulum is at a low point, the top of the piercing head should be within 5mm of the horizontal taxi passing the pendulum's rotating axis. Otherwise, it is necessary to lift and balance the weight. Remove the weight on the pendulum and the sample splint, adjust the pointer to the maximum value, place the pendulum at the starting test position, press the release button to make the pendulum swing. At this time, the pointer should point to the zero point, otherwise, it is necessary to use the zero point conditioning screw on the pendulum for conditioning. When replacing weights of different components, it is necessary to readjust the zero point.
Set Zinc steel guardrail punching machine Put the pointer at the zero point, place it at the starting test position, press the release button to make the pendulum swing. At this time, the pointer must not exceed 3mm outside the zero point, otherwise, oil the pointer bearing or loosen the pressure of the pointer tension spring for conditioning. When no heavy wheels are added, Full automatic punching machine Let the pendulum swing freely until it stops, and the number of swings shall not be less than 300 times.
Zinc steel Guardrail punching machine After the zero point of the pointer is adjusted, align an aluminum plate with an equilateral triangle hole with a side length of 61mm in the center with the hole of the sample pressing plate, press it on the center of the pressing plate, release and fix the dismantling head of the anti-collision ring, and observe that the resistance of the anti-collision ring should not be greater than 78mJ (0.8kg · cm). If it does not meet the requirements, adjust the three jacking screws of the dismantling head, and increase or decrease the pressure of the tension spring.
Add a small shaft at the rear end of the balance weight hole of the pendulum, and install a straight downward screw at the end of the small shaft. Place the screw in the position to be released. The lower part of the screw is pushed on one end of the balance or on the scale pan. Release the pendulum, and add weights on the other end of the balance until the upper plane of the pendulum is parallel, that is, the balance stops.
