Convenient extensometer clamping device and using method thereof

Abstract

The invention relates to a convenient extensometer clamping device and a using method thereof. Threaded ends of two buckling rods respectively pass through through holes of fixing plates of a fixing frame and are fixed on a push plate; a spring is sleeved on a buckling rod between the push plate and each fixing plate; one end of a connecting rod is fixed on the push plate, and the other end of the connecting rod passes through the through holes in the fixing plates of the fixing frame, and is connected with a nut; and one end of an extensometer is fixed in a framework of the fixing frame, and two cutting edge contact points of the other end of the extensometer face saw-tooth shape ends of horizontal short rods of the buckling rods. The using method is characterized in that the fixing plates and the push plate are gripped, so that the springs are compressed, and thrust is generated and is transmitted onto a test sample through the elongation of the buckling rods, so that the test sample is separated from the cutting edge contact points of the extensometer; and conversely, the push plate is loosened, the springs are elongated, and clamping force is generated, so that the test sample and the cutting edge contact points of the extensometer are clamped tightly. The convenient extensometer clamping device is characterized in that the operation is simple and the single-hand operation can be realized; the convenient extensometer clamping device has a good neutral property; the upper cutting edge contact point and the lower cutting edge contact point are simultaneously clamped tightly, and the measurement accuracy is ensured; and the convenient extensometer clamping device does not slip, and does not damage the extensometer.

Description

technical field [0001] The invention relates to an auxiliary clamping device for a measuring instrument, in particular to a portable extensometer clamping device and a using method. Background technique [0002] The extensometer is an important and commonly used measurement tool for the mechanical testing of metal materials. In the tensile test, in order to accurately measure the tensile strain of the material, the extensometer is essential. In daily testing, the blade contacts at both ends of the extensometer need to be tightly clamped with the test sample. The common method is to use rubber bands or small spring hooks to wrap and clamp the upper and lower blade contacts respectively. There are four main disadvantages. One: the operation is troublesome, you must hold the extensometer with one hand, and wrap the rubber band or small spring hook with the other hand; the second is the poor alignment, the upper and lower blade contacts are clamped separately, it is difficul...

AI Technical Summary

Problems solved by technology

In daily testing, the blade contacts at both ends of the extensometer need to be tightly clamped with the test sample. The common method is to use rubber bands or small spring hooks to wrap and clamp the upper and lower blade contacts respectively. There are four main disadvantages. One: the operation is troublesome, you must hold the extensometer with one hand, and wrap the rubber band or small spring hook with the other hand; the second is the poor alignment, the upper and lower blade contacts are clamped separately, it is difficult to make the extensometer and The axis of the sample is consistent, which is easy to produce angles and affects the measurement accuracy; the third is easy to slip, the force of the rubber band and the small spring hook is small, the friction between the sample and the sample is small, it is very easy to slip, and the test is invalid; the fourth is damage Extensometer, when loading and unloading the extensometer, because the upper and lower ends cannot be loaded and unloaded at the same time, the force on the extensometer is unbalanced, which is easy to damage the extensometer

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