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A bulging experimental device for directly testing the mechanical properties of pipes
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A technology of pipe mechanics and experimental equipment, applied in the direction of applying stable tension/pressure to test the strength of materials, etc., can solve the problems of inability to achieve continuous measurement, large size of experimental equipment, high experimental cost, shortened test period and good positioning effect. , to achieve the effect of continuity
Active Publication Date: 2014-10-22
HARBIN INST OF TECH
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[0005] The present invention aims to solve the problems that the existing bulging experimental device for the mechanical properties of pipes cannot realize continuous measurement, low measurement efficiency, large size of the experimental device, high experimental cost and long experimental period, and further provides a bulging device for directly testing the mechanical properties of pipes. shape experimental device
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specific Embodiment approach 1
[0010] Specific implementation mode one: combine figure 1 and figure 2 Explain that a bulging experimental device for directly testing the mechanical properties of pipes in this embodiment includes a hydraulic pump station 1, an oil cylinder 2, a pressure sensor 3, a displacement sensor 4, a booster device 5, a computer 6, a constraint frame 7 and an adjustment block 9 , the constraint frame 7 includes a bottom plate 7-1, a first fixed plate 7-2, a second fixed plate 7-3, a moving sealing punch 7-5, a fixed sealing punch 7-6, and two sealing inserts 7-4 And a plurality of guide posts 7-7, the four corners on the first fixed plate 7-2 plate surface are respectively processed with a first through hole 7-2-1 along the thickness direction of the first fixed plate 7-2 plate surface, the first fixed plate 7-2 The four corners on the two fixed plates 7-3 are respectively processed with a second through hole 7-3-1 along the thickness direction of the second fixed plate 7-3, and the ...
specific Embodiment approach 2
[0011] Specific implementation mode two: combination figure 1 and figure 2 Note that the thrust range of the oil cylinder 2 in this embodiment is 50-500 kN. Other components and connections are the same as those in the first embodiment.
specific Embodiment approach 3
[0012] Specific implementation mode three: combination figure 1 and figure 2 Illustrate that the specific process of utilizing the bulging experimental device to directly test the mechanical properties of the pipe in this embodiment is:
[0013] Step 1: Select the corresponding sealing insert 7-4, moving sealing punch 7-5 and fixed sealing punch 7-6 according to the initial wall thickness, outer diameter and length of the tube blank 8 to be tested, and place the fixed sealing punch 7 -6 is installed at the center of the surface of the first fixed plate 7-2, and the movable sealing punch 7-5 is installed on the piston rod 2-1 of the oil cylinder 2;
[0014] Step 2: Adjust the working pressure of the hydraulic pump station 1 so that the thrust range of the oil cylinder 2 is 50-500kN;
[0015] Step 3: Set the tube blank 8 to be tested between the two sealing inserts 7-4, and set the two ends of the tube blank 8 to be tested in the positioning holes 7-4-1 of the two sealing ins...
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Abstract
The invention discloses a bulging experiment device for directly testing a mechanical property of a pipe, and relates to an experiment device for testing the mechanical property of the pipe. The bulging experiment device solves the problems that the existing bulging experiment device for testing the mechanical property of the pipe cannot achieve continuous measurement, is low in measurement efficiency, large in dimension, high in experiment cost, and long in experiment period. A bottom plate is placed horizontally; a first fixing plate and a second fixing plate are perpendicularly and fixedly connected at the two ends of a plate surface of the bottom plate; first through holes of the first fixing plate and second through holes of the second fixing plate are coaxially formed; two sealing insert blocks are perpendicular to the plate surface of the bottom plate, and arranged between the first fixing plate and the second fixing plate; the two sealing insert blocks are parallel to plate surfaces of the first fixing plate and the second fixing plate; the two ends of each guide post are fastened by nuts; adjusting blocks are horizontally arranged between the two sealing insert blocks; and the two ends of each adjusting block push against the opposite inner end faces of the two sealing insert blocks. The bulging experiment device is used for testing the mechanical property of the pipe.
Description
technical field [0001] The invention relates to an experimental device for testing the mechanical properties of pipe materials. Background technique [0002] In the process of material processing and forming, in order to select a reasonable process flow, determine process parameters and perform performance analysis of the formed product, it is necessary to accurately test the mechanical properties of the material. For pipes, there are generally obvious differences in mechanical properties along the axial and hoop directions. The axial mechanical properties of the pipe can be tested by uniaxial tensile experiments, but for the mechanical properties of the hoop or other directions, if the sample is taken along the corresponding direction and flattened and then uniaxially stretched, the performance of the material must be Due to changes in the flattening process, the experimental results cannot accurately reflect the true mechanical properties of the pipe. [0003] Tube bulgi...
Claims
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