Digital display torsion testing machine for teaching

Abstract

The invention discloses a digital display torsion testing machine for teaching. A 220V single variable speed motor is combined with a worm gear speed reducer for realizing electric loading. A moment arm is combined with a pressure transducer for measuring torque. A rotary coder measures a torsion angle. The testing machine is equipped with a torsion testing machine digital display acquisition instrument, an electronic computer and torsion experiment specialized software. An instant value and a maximal value of the torque are displayed on the front panel of the torsion testing machine digital display acquisition instrument through large numbers. The torsion testing machine transmits the acquired signal to the electronic computer. The torsion experiment specialized software is operated on the electronic computer. A torque-torsion angle curve map and a shear stress-shear strain curve map of the point on the circumference of a torsion sample cross section can be drawn and dynamically displayed, thereby recording a yield torque and a maximal torque, calculating and recording a yield point shear stress and a maximal shear stress, storing all experiment results and realizing printing at any time. Furthermore only a 500W 220V single-phase power supply is required in power consumption.

Description

technical field [0001] The invention relates to material mechanics experiment equipment used in schools, and is particularly suitable for the torsion experiment equipment used in the teaching experiment of material mechanics in engineering colleges and universities specialized in machinery, civil engineering and construction engineering. Background technique [0002] At present, in the teaching of mechanical, civil engineering, and architectural engineering majors in colleges and universities, in order to help students verify the theoretical knowledge of material mechanics they have learned, and to help students cultivate their ability in actual measurement, comprehensive application, and innovation, a torsion experiment is set up. project. The experimental project, first of all, should solve the problems of torsional loading, measurement, display, calculation and recording of the tested sample. At present, most of the resistive torsion testing machines only display torque ...

AI Technical Summary

Problems solved by technology

[0003] 1. In the teaching torsion experiment, it is not only required to be able to measure and display the torque and torsion angle, but also to be able to draw the ideal relationship curve between the torque and the torsion angle. However, most torsion testing machines only display the torque and torsion angle, and cannot draw The relationship curve between torque and torsion angle, some of which are useful for reel mechanical drawing, is very rough and does not meet the requirements of teaching experiments

[0004] 2. The high-end microcomputer-controlled electronic torsion testing machine needs a large power supply; during the experiment, the torque value displayed on the computer monitor is very small, which is not convenient for many students to watch; the operation is more complicated, and in the limited experiment It is difficult for students to master during class hours; the cost is extremely high, and the utilization rate for teaching experiments alone is very low, and it will cause great waste to equip multiple sets for student group experiments

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