Accurate falling ball positioning indication type falling ball testing machine

Abstract

The invention provides an accurate falling ball positioning indication type falling ball testing machine which comprises a base, a guide rod and a magnetic base clamp. The machine is characterized inthat the base is provided with a force value sensor, a force value display window and a periphery liftable enclosure. A lifting guide rod is provided with scales, and the magnetic base clamp is provided with an infrared positioning device and a magnetic base. The machine is simple in structure and convenient to use, the influence of external wind speed and airflow on the falling track of the steelball can be avoided, the falling track of the steel ball can be accurately positioned, the magnetic base can be prevented from adsorbing the steel ball many times, the falling point impact force of the steel balls with different diameters can be rapidly and accurately displayed, ball falling deviation and ball falling resistance are avoided, and the test efficiency and test accuracy are improved.

Description

Technical field: [0001] The invention relates to the technical field of testing devices for impact resistance of glass substrates, in particular to a falling ball testing machine with accurate falling ball positioning and value indication. Background technique: [0002] The rapid development of touch display devices has promoted the continuous growth of the cover glass industry, and electronic devices with screens, such as notebook computers, tablet computers, mobile communication terminals, LCD screens and other test models, have increasingly high requirements for the quality of cover glass. higher. The impact resistance of its body needs to be tested. [0003] At present, the industry basically uses the falling ball impact tester to test the impact resistance performance, and the falling ball tester is the most important equipment in the processing and testing of cover glass. Most of the testing machines used rely on visual inspection to align the center point of the fal...

AI Technical Summary

Problems solved by technology

Most of the testing machines used rely on visual inspection to align the center point of the falling ball with the test point of the object under test, and calculate the impact force of the falling ball simply by the mass of the steel ball and the drop height. However, due to the size of the steel ball during the test (that is, steel ball mass change), the falling distance of the steel ball (that is, the height of the steel ball from the sample) or the deviation of the falling position, etc., there will be the following disadvantages: when changing the steel ball with different diameters or moving the height of the steel ball fixture from the sample, the positioning center point often changes If the center position cannot be guaranteed, the steel ball will deviate. Once the electromagnet of the steel ball fixture is powered off, the steel ball will fall freely, which will lead to inaccurate landing of the steel ball. If the ball passes through the electromagnet for many times, it may also cause a delay in the adsorption and falling of the steel ball, which will affect the falling force

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