Device and method for loading and measuring of large load testing machine

Abstract

The invention provides a device and a method for loading and measuring of a large load testing machine. The device comprises a large load loading device, a displacement sensor and loading sensors, wherein the large load loading device is connected with a servo control system and comprises a servo oil source, an actuator of the testing machine and a testing tooling; the displacement sensor and theload sensors are connected with the actuator of the testing machine; the servo control system comprises servo control software and a controller. The method comprises the following steps of according to different testing loads, arranging the proper load sensor; designing the testing tooling which is matched with the original large load sensor; respectively metering the large-tonnage and small-tonnage load sensors, and selecting the different size of sensor according to the testing content; performing small load testing by a loading device and a servo control unit of the large load testing machine. The device has the advantages that the small-tonnage load testing by the large load testing machine can be realized; under the condition of not increasing equipment investment, the testing accuracy and control degree of the testing are greatly improved; the application range of equipment is greatly widened.

Description

technical field [0001] The invention relates to the field of load testing of a large-tonnage testing machine, in particular to a device and method for a small-load testing of a large-tonnage testing machine. Background technique [0002] In general, testing machines with different loading tonnage levels are used for loading tests of corresponding levels, which is why there are 10 tons, 20 tons, 30 tons, 50 tons, and 100 tons of testing machines of various specifications. If a 100-ton testing machine is used to do a loading test of only a few tons, although the test can also be carried out, the accuracy of the test cannot meet the requirements, which is why it is commonly known as a large horse-drawn cart. [0003] The current testing machine is generally calibrated according to the full scale of the testing machine load by means of classification, and is routinely calibrated and measured according to four gears of 1, 2, 5, and 10. 1 corresponds to the full scale, and 2 corre...

AI Technical Summary

Problems solved by technology

If a 100-ton testing machine is used to do a loading test of only a few tons, although the test can also be carried out, the accuracy of the test cannot meet the requirements. This is why it is commonly known as a large horse-drawn cart.

[0003] The current testing machine is generally calibrated according to the full scale of the testing machine load by means of classification, and is routinely calibrated and measured according to four gears of 1, 2, 5, and 10. 1 corresponds to the full scale, and 2 corresponds to the full scale. 50% of the range, 5 corresponds to 20 of the full scale, 10 corresponds to 10% of the full scale, and some manufacturers have more classification standards for the equipment shipped from the factory, but we know that the load cell has certain linearity and repeatability If the linearity is poor, it can be corrected by nonlinear compensation method, but if the repeatability is not good, no matter how many gears are divided, it is useless

Especially for load sensors produced in China, there is no mass production of a certain type of load sensor, and the production plan is based on the user's order, so the material characteristics of the manufactured sensor have not been fully effective.

When the sensor is in use, if there is any change in temperature or humidity, it will have an impact on the characteristics, especially the change in the 10% gear has the greatest impact. Although it can still be measured, the test data is found to be unsuitable through measurement. accuracy, that is, the test does not have the statutory benefit

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