Details of installing a universal test machine and requirements for fixtures

The universal testing machine is the product of the combination of modern electronic technology and mechanical transmission technology. It is a large precision testing instrument composed of the special characteristics of mechanical and electrical systems. It can conduct a variety of performance tests such as tensile, compression, bending, peeling, and shear on various materials. It has the characteristics of wide measurement range, high accuracy and fast response. Reliable work and high efficiency, and can display and record and print test data in real time. Let’s introduce the details of installing a universal test machine and the requirements for fixtures. Let’s take a look.

1. Details of installing a universal test machine

1. The universal testing machine needs to be installed in a room with clean, dry, no vibration, and the indoor temperature is between twenty degrees and ten degrees. At the same time, beam bending tests must be carried out. Extensometers can also be used during the test; sufficient space should be left around the equipment during installation. The main body of the equipment and the dynamometer must be installed on the concrete. The size of the foundation must be based on the appearance and foundation pattern rules, leaving holes for anchor screws and lower jaw screws, as well as other wires and pipes for installation.

2. The upper plane of the foundation must be very flat. A horizontal ruler is required when rectifying. Only after the foundation is installed can the test machine be installed. After the main body and the dynamometer are transported to the concrete respectively, it is necessary to adjust it according to the appearance and foundation map. During adjustment, the spacing and direction between the main body and the dynamometer must be ensured.

3. When installing the universal test machine, you can also insert some small iron sheets into the main body and the dynamometer and then straighten it. When the main body is initially straightened, you can use a room level to measure it at different positions of the vertical and horizontal positions of the two columns. Then, you can use a square level to lean against the vertical and horizontal positions of the outer surface of the oil cylinder to correct the straightness of the plumb straightness of the equipment.

4. After correcting the initial accuracy of the universal test machine, the oil pipe, power supply, and oil filling must be turned on before stopping the initial operation. If the initial operation is relatively smooth, stop correcting the accuracy of the equipment. When correcting, you need to use a square degree instrument to lean on the working platform to align the plumb slature of the oil cylinder, adjust or increase or decrease the horns under the base, and control the error to a certain range.

2. Requirements for installing universal testing machine fixtures

1. Correct clamping of the sample is very important for the test and directly affects the success or failure of the test and the accuracy of the test data;

2. For rectangular samples and brittle samples, clamping is more important;

3. When clamping, install the sample in parallel as far as possible, and then stretch it after parallel;

4. In steel wire winding fixtures, the wire cannot be pressed, which will cause local stress concentration and will often break from the compressed line, causing breakpoint spread;

5. For wedge-shaped fixtures, the left and right centering of the sample is guaranteed by the fixtures, but it is easy to install inclined front and back. After installing inclined, the pressure on both sides of the sample is uneven during the stretching process, which may tear the sample or break point spread;

6. For overlap samples, the overlapping surface should pass through the force action center of the sensor.

Before using any test machine, you must have a full understanding of the product fixtures so that you can better achieve human-machine running-in during operation. This improves production efficiency. The above is an introduction to the details of installing the universal test machine and the requirements for fixtures. I hope it can help you.