Tensile fixture for plate type sample and using method thereof

Abstract

The invention discloses a tensile fixture for a plate-type sample and a using method of the tensile fixture, the tensile fixture comprises an upper fixture and a lower fixture, and the end parts of the upper fixture and the lower fixture are respectively provided with a T-shaped notch matched with the end part of the tensile sample; at least two T-shaped clamping blocks which are matched with theT-shaped notch and used for clamping a tensile sample are detachably installed in the T-shaped notch, and pressing plates are installed on the two side faces of the T-shaped notch respectively. The using method of the tensile fixture comprises the step of respectively installing the upper fixture and the lower fixture in an upper chuck and a lower chuck of a universal material testing machine to carry out a tensile test. When the tensile fixture provided by the invention is used for carrying out a tensile test on a plate-type tensile sample, the tensile sample can be clamped and fixed withoutperforating the end part of the tensile sample, so that the phenomenon that the tensile fixture slips and cannot clamp the sample tightly due to long-time use can be effectively prevented, and the experimental effect of the tensile test is effectively ensured.

Description

technical field [0001] The invention relates to a tensile fixture and a using method thereof, in particular to a tensile fixture for a plate sample and a using method thereof. Background technique [0002] With the rapid development of the country's economy, the country's demand for mechanical products is increasing day by day. How to improve the mechanical properties of products and then improve the service life of products has become a top priority for manufacturers. Tensile strength is an important index used to evaluate the mechanical properties of products, so tensile testing is usually required for products. [0003] The tensile test is mainly completed on the universal material testing machine. When the sample to be tested is stretched, it usually needs to be clamped and fixed by the tensile fixture on the testing machine before stretching. However, for the plate sample, with the universal With the increase in the use time of the material testing machine, the clamps ...

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Problems solved by technology

[0003] The tensile test is mainly completed on the universal material testing machine. When the sample to be tested is stretched, it usually needs to be clamped and fixed by the tensile fixture on the testing machine before stretching. However, for the plate sample, with the universal With the increase in the use time of the material testing machine, the clamp of the plate tensile sample sometimes cannot clamp the sample tightly, which affects the accuracy of the test results

[0004] The clamps used for tensile testing usually include an upper clamp and a lower clamp. For the tensile test of plate samples, there are mainly two types of tensile clamps commonly used at present: one is as disclosed in patents CN201721192456.8 and CN201721649321.X The splint-type fixture mainly uses the splint-type upper and lower fixture bodies to clamp the upper and lower ends of the sample, and then uses fastening screws or pins to fasten and fix it. When using this kind of fixture for tensile testing, It is usually necessary to open holes at both ends of the plate sample, which will easily cause deformation at the end opening of the sample. For thinner samples, the sample may even break from the hole during the stretching process, resulting in tensile failure. The test failed; the other is to use a grooved fixture, install two splints in the fixture grooves of the upper and lower fixtures, place the sample between the splints during the test, and rely on the clamping force of the splints on both sides to fix the sample , but with the prolongation of the use time of this kind of fixture, the serrated clamping surface of the splint on both sides will wear out, so that the clamping force is not enough, and the tensile sample with high tensile strength cannot meet the tensile test requirements at all.

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