Calibration method and apparatus for pendulum impact testing machine

Abstract

The invention provides a calibration method and apparatus for a pendulum impact testing machine, relating to technology of measurement and calibration. The calibration method comprises the following steps: step 1, carrying out calibration by using the calibration apparatus for the pendulum impact testing machine; 2, carrying out the following procedures for calibration: aligning a hit vertex of the pendulum impact testing machine to be calibrated with a designated hit point of the calibration apparatus for the pendulum impact testing machine, adjusting the height of a pendulum of the pendulumimpact testing machine to be calibrated, wherein, the height corresponds to impact energy, an indicated value E0 of which is obtained through calculation, resetting the calibration apparatus for the pendulum impact testing machine, starting the pendulum impact testing machine to be calibrated, reading an actual measurement value E1 of impact energy on an indication plate of the calibration apparatus for the pendulum impact testing machine, and analyzing the value of Edelta, wherein, Edelta satisfies the equation of Edelta=E0-E1. The calibration apparatus comprises a base plate, a vertical rack, a vertical swing rod, a rod shaft and an indication reading means. According to the invention, impact energy can be measured directly, actual measurement of energy loss caused by frictional resistance when the pendulum of the pendulum impact testing machine to be calibrated swings can be realized, and accuracy is improved.

Description

technical field [0001] The invention relates to measurement and calibration technology, in particular to a method and device for calibrating a pendulum impact testing machine. Background technique [0002] Pendulum impact testing machine is a device that simulates impact energy and tests products. For example, the impact resistance of the heel is generally tested by a pendulum impact testing machine, and according to the law of energy conservation E 势 =E 动 -E 损失 , by adjusting the height of the pendulum to obtain the required impact kinetic energy. [0003] figure 1 Shown is a pendulum impact tester (shoe fatigue impact tester). A pendulum 2 is installed on the bracket 1, and a pendulum 3 is fastened to the lower end of the pendulum 2. The pendulum with a certain mass swings and falls under the action of gravity, and hits the impact apex (such as the heel 4) directly below the pendulum system. , the impact energy of the hit apex can be read directly on the scale 5 (the...

AI Technical Summary

Problems solved by technology

[0006] Second, the pendulum system is a mechanical structure, and the frictional force experienced by the pendulum during the swing is relatively large. It is difficult to calculate and deduct the work (that is, energy) done by the frictional force, which leads to deviations in the simulated values.

[0007] Third, the energy value cannot be measured directly, but the result calculated by measuring the mass of the pendulum and the drop height (E 势 = mgh)

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