Calibration device for testing with crushed-stone testing machine

Abstract

The invention relates to a calibration device for testing with a crushed-stone testing machine. The calibration device comprises the crushed-stone testing machine, a load sensor, a linear velocity measurement sensor, a data collecting card and a host computer, wherein the crushed-stone testing machine comprises an injection channel, a feeding device and a striking experiment box, a test piece mounting table which is upwardly and downwardly adjustable, and an experiment controller; one end of the injection channel is a compressed air inlet and is provided with a pressure regulating valve and apressure gauge; the other end of the injection channel communicates with the striking experiment box; the feeding device is arranged on the injection channel; the experiment controller is connected with the pressure regulating valve and the pressure gauge; the load sensor and the linear velocity measurement sensor are both detachably mounted on the test piece mounting table which is upwardly and downwardly adjustable. Compared with the prior art, the invention has the advantage that the calibration device can provide an effective basis for the calibration of the striking force and the strikingspeed of the crushed-stone testing machine, ensures the accuracy of subsequent test results, and is simple in structure, reasonable in design and easy and convenient to operate.

Description

technical field [0001] The invention relates to the technical field of testing and calibration, in particular to a calibration device for testing a gravel testing machine. Background technique [0002] In actual driving conditions, the car is impacted by heavy objects such as falling materials and road gravel, which will not only damage the decorative effect of the coating, but also affect the anti-rust time of the coating. [0003] Ordinary gravel testing machine uses the thrust of the cylinder to make a large number of steel shots or gravel with sharp edges hit the coating surface in a short time. After the blow is over, remove the loose coating with adhesive tape to reveal the remaining stone hit marks on the sample plate, and judge the impact resistance by analyzing the degree of damage of the coating. [0004] The testing method of the existing gravel testing machine is to control the impact pressure by the cylinder, so there is a shortcoming that the impact force and ...

AI Technical Summary

Problems solved by technology

[0004] The testing method of the existing gravel testing machine is to control the impact pressure by the cylinder, so there is a shortcoming that the impact force and the impact speed cannot be tested.

It is difficult to achieve quantitative control of test accuracy, resulting in considerable differences in test results

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