Understanding of various types of fixtures for tensile testing machines

Tension testerThe fixture itself is a locking mechanism. The fixture for tensile testing machine has no fixed structure. According to different samples and test forces, there are great differences in structure. Samples with large test forces generally adopt a sloped clamping structure. As the test force increases, the clamping force increases accordingly. Shoulder samples adopt a suspended structure, etc. If the fixtures are divided according to the structure, they can be divided into wedge-shaped fixtures (referring to fixtures using the inclined locking principle), clamping fixtures (referring to fixtures using the single-sided or double-sided threaded top tightening principle), winding fixtures (referring to fixtures using the specimen through winding), eccentric fixtures refer to (referring to fixtures using the eccentric locking principle), lever clamps (referring to fixtures using the lever force amplification principle), shoulder clamps (referring to fixtures suitable for shoulder specimens), bolt clamps (referring to fixtures suitable for bolts, screws, studs and other test thread strength), 90° peeling fixtures (referring to fixtures suitable for two samples for hanging and straight peeling), etc. We know that mechanical locking structures include: yarns (i.e. threads, screws, nuts), bevels, eccentrics, levers, etc. The fixtures are a combination of these structures. The structures of these fixtures have their own advantages and disadvantages, such as: wedge-shaped fixtures, the initial clamping force is small, and increases with the test force. The clamping force increases accordingly. For clamping fixtures, the initial clamping force is large and increases with the test force. The clamping force decreases accordinglyTension testerThe fixture itself does not have a fixed structure (such as metal wires can be clamped by winding, or two flat plates can be clamped by wedge-shaped clamping, or clamping clamping can be clamped by wedge-shaped clamping), which is obvious difference from the host machine. The main machine of the test machine is similar to the domestic and foreign ones, while the different fixtures are very different from the domestic ones, and there are also big differences between different companies. This mainly depends on the overall level of the company and the accumulation of experience of the designers. Foreign fixtures, such as INSTRON, MTS, ZWICK and other companies, are generally meticulous in workmanship and high reliability, but are at a high price, and are in the high-end market. Domestic fixtures, such as Guangzhou Aoke Testing Instrument Co., Ltd., have a wide range of industries and a large domestic market share, and can replace foreign fixtures to a certain extent, but there is still a lot of difference with foreign precision.

MoreMaterial testing machineAll information is in Jinan Hengsi Shanda Instrument Co., Ltd.