A device and test method for measuring the tensile strength of wire micro-samples
A technology for tensile strength and plate samples, applied in the direction of measuring devices, using stable tension/pressure to test material strength, strength characteristics, etc., can solve problems such as tensile mechanical performance testing, to avoid fracture, shock, loss, The effect of low cost and easy operation
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Embodiment 1
[0025] The invention can be used to measure the tensile mechanical properties of wire rods with diameters ranging from 3 mm to 20 mm in each direction. Referring to FIG. 1 , the micro-I-shaped plate sample of the present invention is composed of a vertical test part 1 and clamped parts 2 at both ends perpendicular to it. refer to Figure 1a , when the I-shaped sample is cut, the axis of the vertical test part 1 is parallel to the direction of the mechanical properties of the wire concerned in the tensile test. refer to Figure 1b , the thickness D of the clamped part 2 at both ends of the I-shaped sample is more than 1.5 times the width d of the vertical test part 1, and it is ensured that the force-bearing length in close contact with the groove 4 is not less than that of the test part 1 0.5 times the length L of the protruding part, the transition between the test part 1 and the clamped part 2 is rounded. Cut the metal foil 3 into a rectangle with a length a>2L+d and a wid...
Embodiment 2
[0035] A device for measuring the tensile strength of tiny samples of wire rods, comprising a base and a frame beam 10, the base and the frame beam 10 are respectively symmetrically provided with fixed rods 9, and the protruding ends of the fixed rods are provided with a clamp body 6. The two fixture bodies are fixed as mirror images, and a tiny I-shaped plate sample is arranged between the fixture bodies. The tiny I-shaped plate sample is clamped by the vertical test part 1 and its two ends perpendicular to it. The holding part 2 is composed, and the clamped part 2 is provided with a metal foil 3. The thickness of the clamped part 2 is not less than 1.5 times the width of the test part 1 . The force-bearing length between the clamped part 2 and the clamp body is not less than 0.5 times the length extending from the test part 1 . The connection between the clamped part 2 and the test part 1 is transitioned with rounded corners. The metal foil is longer than the clamped part ...
Embodiment 3
[0038]Combined with the device structure of Example 2, the diameter of the tested high carbon steel wire is 8.25mm. refer to Figure 1a As shown in Fig. 1, two small I-shaped plate samples were cut with the axis of test part 1 parallel to the steel wire axis (axial sample) and perpendicular to the axial direction (radial sample). refer to Figure 1b The thickness D of the clamped part 2 at both ends of the I-shaped sample is 2 mm, which is twice the width d of the vertical test part 1 of 1 mm, and the cross-sectional area of the test part 1 is 0.7 mm. 2 , the gauge length is 5mm. The length L of the part protruding from the test part 1 on the clamped part 2 is 3 mm, and the force-bearing length in close contact with the groove 4 is greater than 1.5 mm, which is more than 0.5 times the length L. The transition between the test part 1 and the clamped part 2 is rounded. Cut the rectangular metal foil 3, the length a is 15 mm, and the width b is 4 mm, and ensure that it can b...
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Abstract
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