Do you know the different requirements of the tensile testing machine for the fixture

Tensile testing machine is also called universal material testing machine. The universal testing machine is a mechanical afterburner testing machine for static load, tension, compression, bending, shear, tear, peeling and other mechanical properties of various materials. It is suitable for plastic plates, pipes, profiles, Various physical and mechanical performance tests of plastic film and rubber, wire and cable, steel, glass fiber and other materials are developed as materials, which are indispensable inspection equipment for physical testing, education and research, quality control, etc. The tension machine fixture is an important component of the instrument In part, different materials require different fixtures, which is also an important factor in whether the test can proceed smoothly and the accuracy of the test results. So next, let's explain the different requirements of the tensile testing machine on the fixture.

1. for general metal and non-metal samples, the fixture mouth of the fixture is in direct contact with the sample. Generally, high-quality alloy structural steel, alloy high-carbon steel or low-carbon alloy steel, cold die steel, etc. are selected, and quenched by appropriate heat treatment technology. , Carburizing and quenching, etc. to improve strength and wear resistance. Sometimes special steel is inlaid in the fixture port, or the surface of the fixture port of the tensile testing machine is coated with gold steel grit (suitable for fixture hard metal materials, such as steel wire and other materials).

2. for the jig with small test force, the surface in contact with the sample is made of soft rubber or the like. (For example, the clamping surface of the clamp for samples such as plastic film, fiber filament, etc.) The clamp is generally made of high-quality medium carbon steel and alloy structural steel, and its mechanical properties are increased through an appropriate heat treatment process. In order to reduce weight, non-ferrous metals such as aluminum alloys and special metals are also used. Sometimes cast steel, cast aluminum, etc. are used for cast structures.