High precision tensile testing machineFixtures are the main accessories we need to use for tensile testing, so we must operate them correctly before use and during maintenance, otherwise it is not conducive to testing and shortens the use time of the tensile testing machine fixture.

High precision tensile testing machineCommon knowledge of fixture maintenance:

1. Before use, check whether the fixture of the tensile testing machine is firm and capable of clamping work

2. Is the clamping sample installed correctly during the process? Incorrect clamping may damage the fixture

3. The fixture should remove any excess material after the experiment to avoid affecting the next test

4. Store the fixtures properly and apply glycerin rust prevention appropriately.

High precision tensile testing machineTips for using fixtures:

1. For wedge-shaped fixtures (clamp fixtures), the left and right alignment of the specimen is operated by the fixture, but it is prone to misalignment before and after installation. After misalignment, uneven force on both sides of the specimen during the stretching process may tear or break the specimen. When clamping the specimen early, it is necessary to keep it parallel and vertically perpendicular.

2. There should be no wire pressure in the winding fixture, and for overlapping samples, the overlapping surface should pass through the force center of the sensor. This will cause local stress concentration, often resulting in discontinuity at the pressure line.

3. When installing the upper clamp, first connect the universal joint to the upper connecting seat, then connect the two to the upper crossbeam, connect the upper clamp to the upper joint, then connect it to the universal joint through the fixing pin, and finally tighten the locking nut. Place the upper clamp onto the lower clamp and manually raise the middle crossbeam to assemble the upper clamp with the universal joint. At this point, the middle crossbeam should be moved carefully to avoid damaging the components. When installing the lower clamp, first connect the lower joint to the lower clamp, then insert the two into the guide rod and connect them through the fixing pin. After that, tighten the locking nut and connecting nut to eliminate the gap.

4. When clamping the sample, follow the standard and ensure that the sample is installed correctly. The success or failure of the experiment and the accuracy of the test data are directly affected, and the force line of the sample should be aligned with the force line of the sensor as much as possible.