Fixture for security and fast installation of CT sample

Abstract

The invention discloses a fixture for security and fast installation of a CT sample. The fixture for security and fast installation of the CT sample includes a chuck assembly and a U-shaped fixture; the chuck assembly includes two chucks and two pins that are cooperated and connected; the two chucks are separately connected to the base and top chuck of a universal testing machine; each chuck is provided with two through holes; the ends of the two sides of the U-shaped fixture extend outward to form protrusions, and the size of each protrusion matches the through hole; the two protrusions of the U-shaped fixture are inserted into the through holes corresponding to the two chucks; the U-shaped fixture is provided with an inner cavity for accommodating the CT sample; and the CT sample is provided with a mounting hole for mounting a pin. According to the invention, the U-shaped fixture is first installed and fixed on the chuck assembly by using a fixture with a limited structure; and thenthe CT sample is put into the fixture and fixed with the pin; therefore, the operation is faster, more accurate and easier, the safety of the experimental operation is greatly improved, and the injuryof the fingers of an experimenter caused by clamping is avoided; and meanwhile, the fixture for security and fast installation of the CT sample is provided, and the automated experiment on fracture toughness is possible.

Description

technical field [0001] The invention belongs to the technical field of mechanical property detection fixtures, and in particular relates to a fixture for installing CT samples in high-temperature water environment fracture toughness tests, which is convenient for installing CT samples safely and quickly. Background technique [0002] The structural integrity of nuclear power pressure vessels is an important equipment to ensure the safety of nuclear power, and the most critical parameter for evaluating and ensuring the structural integrity of pressure vessels is the fracture toughness of service materials. Usually, a large number of fracture toughness tests are required to test the crack resistance of the material. During the test, the installation of the CT sample is complicated and often cannot be centered, so that the pin shaft cannot be installed accurately. The testing machine must be fine-tuned constantly, and fingers must always be prevented. Being pinched, the risk fa...

AI Technical Summary

Problems solved by technology

Usually, a large number of fracture toughness tests are required to test the crack resistance of the material. During the test, the installation of the CT sample is complicated and often cannot be centered, so that the pin shaft cannot be installed accurately. The testing machine must be fine-tuned constantly, and fingers must always be prevented. Being pinched, the risk factor is high, especially with the improvement of the automation level of sample equipment, in order to improve the safety and test efficiency of the test, a fixture that can facilitate safe and fast CT specimens needs to be developed urgently, but there is no suitable fixture that can Meet the needs of safe and fast fracture toughness test

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