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A kind of tensile sample preparation device with excellent cutting edge quality and using method

A technology for tensile samples and preparation devices, which is applied in the preparation of test samples, etc., can solve problems such as the inability to provide objective and practical theoretical guidance, and achieve the effect of excellent trimming quality and elimination of early fractures

Active Publication Date: 2018-08-07
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a big difference between the elongation performance of the material tested and the actual deformation achieved by the part shaping and flanging of the tensile specimen prepared by it, which cannot provide objective and practical guidance for the design of the blanking die and the design of the blanking process. theoretical guidance

Method used

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  • A kind of tensile sample preparation device with excellent cutting edge quality and using method
  • A kind of tensile sample preparation device with excellent cutting edge quality and using method
  • A kind of tensile sample preparation device with excellent cutting edge quality and using method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] It is known that the thickness t of the steel plate of the tensile sample to be prepared in this embodiment is 1.2mm, and the elongation is 35%;

[0044] Its use steps:

[0045] 1) Cut the tensile sample blank, and its width and length should exceed the contour line of the sample drop groove 2 by 15mm;

[0046] 2) According to the requirements of the tensile test, the distance G between the lower cutter 1 7 and the lower cutter 2 8 is calculated, and the distance G is determined according to the following formula: Substitute t=1.2mm into the following formula, and take the correction factor as 3%.

[0047] G=2(t×3%)=2(1.2×3%)=7.2mm

[0048] 3) According to the calculated G value, place the equivalent feeler gauge between the lower cutter 1 7 and the lower cutter 2 8, adjust the lower cutter 1 7 and the lower cutter 2 8 in equal amounts and put them in place, and then adjust the bolt 1 11 and adjusting bolt two 12 are fixed;

[0049] 4) Place the tensile sample blank ...

Embodiment 2

[0055] It is known that the thickness t of the steel plate of the tensile sample to be prepared in this embodiment is 0.9mm, and the elongation is 42%;

[0056] Its use steps:

[0057] 1) Cut the tensile sample blank, and its width and length dimensions exceed the contour line of the sample drop groove 2 to be 16mm;

[0058]2) According to the requirements of the tensile test, the distance G between the lower cutter 1 7 and the lower cutter 2 8 is calculated, and the distance G is determined according to the following formula: Substitute t=0.9mm into the following formula, and take the correction factor as 11%,

[0059] G=2(t×3%)=2(0.9×11%)=19.8mm

[0060] 3) According to the calculated G value, place the equivalent feeler gauge between the lower cutter 1 7 and the lower cutter 2 8, adjust the lower cutter 1 7 and the lower cutter 2 8 in equal amounts and put them in place, and then adjust the bolt 1 11 and adjusting bolt two 12 are fixed;

[0061] 4) Place the tensile samp...

Embodiment 3

[0067] It is known that the thickness t of the steel plate of the tensile sample to be prepared in this embodiment is 0.65mm, and the elongation is 44%;

[0068] Its use steps:

[0069] 1) Cut the tensile sample blank, and its width and length should exceed the contour line of the sample drop groove 2 by 15mm;

[0070] 2) According to the requirements of the tensile test, the distance G between the lower cutter 1 7 and the lower cutter 2 8 is calculated, and the distance G is determined according to the following formula: Substitute t=0.9mm into the following formula, and take the correction factor as 13%.

[0071] G=2(t×13%)=2(0.65×11%)=0.169mm

[0072] 3) According to the calculated G value, place the equivalent feeler gauge between the lower cutter 1 7 and the lower cutter 2 8, adjust the lower cutter 1 7 and the lower cutter 2 8 in equal amounts and put them in place, and then adjust the bolt 1 11 and adjusting bolt two 12 are fixed;

[0073] 4) Place the tensile sample...

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Abstract

An excellent trimming quality tensile specimen preparation device mainly comprises a base, a sample drop groove on the base, card slots symmetrically arranged on both sides of the sample drop groove, connection holes respectively arranged on the card slots, lower cutting knives correspondingly arranged in the card slots, adjusting holes respectively arranged on the two lower cutting knives, adjusting bolts respectively arranged in the adjusting holes, a sample punching knife arranged just above the sample drop groove, and a hydraulic driver connected with the sample punching knife; a use method is as follows: a tensile specimen blank material is tailored; distance G between the two lower cutting knives is calculated; the two lower cutting knives are equivalently adjusted according to a G-value-equivalent feeler gauge and fixed by the bolts; the tensile specimen blank material is placed between the two lower cutting knives; the sample punching knife is used for preparation of the tensile specimen shape; and a sample is taken out, and subjected to a tensile test. The fluctuation range of the elongation percentage of the tensile specimen and the elongation percentage of a tested steel sheet does not exceed 2%, the trimming quality is excellent, the early breakage can be eliminated, and the excellent trimming quality tensile specimen preparation device has practical significance on guiding of design and process of a blanking die.

Description

technical field [0001] The invention relates to a preparation device and a use method of a steel plate test sample, in particular to a preparation device and a use method of a tensile sample with excellent trimming quality. Background technique [0002] Before the parts are stamped, the blanks must be blanked. The blanking methods include: blanking die blanking, pendulum shear blanking, arc knife blanking, laser blanking, etc., among which the most commonly used is blanking die blanking. After blanking, the blank is stamped and formed, and some parts will involve shaping, flanging, etc. after stamping and forming. Shaping and flanging are highly dependent on the edge processing quality of the blanking sheet. When the trimming quality of the blank is poor, due to the influence of work hardening and burrs on the edge, early fractures are prone to occur during the shaping or flanging of the material. For the same material, the quality of the blanking edge is different, and i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28
CPCG01N1/28
Inventor 祝洪川吴青松魏星孙宜强张斌张思思李凡刘昱赵春晖
Owner 武汉钢铁有限公司