Pendulum-type impact tester

Abstract

The invention discloses a pendulum-type impact tester. The impact tester consists of a machine frame, a pendulum bob, a jaw seat and a pendulum hanging mechanism, wherein a pendulum body of the pendulum bob adopts a sectorial structure; the pendulum is provided with a certain amount of balancing weight holes in different size, so that the simply supported beam impact and cantilever beam impact tests are realized, and by changing a pendulum angle, the impact energy and the impact speed can be changed, the requirements of a plurality of measuring ranges are met, the wind resistance of the pendulum body with sectorial face is small, the energy loss is small, and the phenomenon of bent pendulum rod caused when the impact point deviates the mass center can be avoided. Moreover, the tester has the advantages of convenient assembly-disassembly and debugging, reasonable structure, low cost and convenient use, and is convenient to be used by production enterprises and is favorable for researchtests.

Description

technical field [0001] The invention relates to a test device for measuring the absorbed energy when a test material is impacted once, especially a pendulum impact tester. Background technique [0002] In the industrial field, the impact test is usually used to measure the toughness of materials. The pendulum raised by the testing machine is used to make an impact, so that the sample is broken along the notch, and the absorbed energy of the sample is calculated by the height difference of the pendulum when it is broken. At present, pendulum impact testing machines are divided into simply supported beam impact testing machines and cantilever beam impact testing machines. A V-shaped impact blade is embedded in the U-shaped groove of the test machine. The jaw seats of the two testing machines are different, and they are respectively suitable for the simple-supported beam type and the cantilever beam type. The pre-lift angle is generally 120° to 150°. The existing deficiencies ...

AI Technical Summary

Problems solved by technology

The existing deficiencies of this pendulum type impact testing machine are mainly manifested in the following aspects: 1. The structure of the above-mentioned pendulum body makes the center of mass of the hammer difficult to fix, and it is necessary to repeatedly counterweight to ensure that the center of mass is on the impact point , otherwise the hammer rod will be bent during the impact test; 2. One machine cannot do multi-energy impact tests at the same time, but can only do one or two energy impact tests; 3. One machine can only do simple impact tests. Support beam or cantilever beam test is not conducive to research and test, which increases the cost of instruments in the laboratory

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