Gradient hardness detection device and method for cutter ring section of hob of heading machine
A technology of detection device and roadheader, applied in the direction of testing material hardness, etc., can solve the problems of non-solidification of measurement points, inconsistent hardness of the same measurement point, and difficulty in ensuring the same position of measurement points, so as to solve detection problems, ensure accuracy, and measure Efficient effect
Active Publication Date: 2019-09-13
维尔特科创技术服务(北京)有限公司 +1
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Problems solved by technology
[0005] The purpose of the present invention is to propose a gradient hardness detection device and method for the section of the hob cutter ring of the roadheader, which solves the problem that the measurement point is not solidified in the prior art, and it is difficult to ensure the same position of the measurement point and the same measurement for different cutter ring test pieces. The problem of inconsistent point hardness
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[0032] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0033] See attached figure 1 , the gradient hardness detection device of the roadheader hob cutter ring section of the present invention comprises:
[0034] A positioning disc 1, the positioning disc 1 includes a disc body 101, and the disc body 101 is provided with a positioning groove 102 extending from the outer circumference of the disc body 101 to the center of the circle;
[0035] Two transverse positioning bodies 2 arranged on the disk body 101 and positioned on both sides of the knife ring test piece 4 to be tested are arranged symmetrically about the center line of the positioning groove 102 passing through the center of the disk body 101, and each The lateral positioning body 2 includes at least two lateral positioning blocks arranged side by side and sliding relative to the disc body 101 along the centerline direction of the positioning groov...
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Abstract
The invention relates to a gradient hardness detection device and a method for a cutter ring section of a hob of a heading machine, which belong to the technical field of cutter ring detection of theheading machine and solve the problems that the positions of measuring points are difficult to ensure the same and the hardness of the same measuring point is not consistent aiming at different cutterring test pieces. The device comprises: a positioning disc, wherein the positioning disc comprises a disc body, and the disc body is provided with a positioning groove in the circumferential direction of the circle center of the outer circle of the disc body; two transverse positioning bodies which are arranged on the disc body and positioned on two sides of the cutter ring test piece to be tested; and two longitudinal positioning bodies which are arranged on the disc body and positioned on two sides of the cutter ring test piece to be tested. According to the method, the transverse positioning bodies and the longitudinal positioning bodies start to measure at the distance of 5mm from the end portion of the cross section of the cutter ring, three points are measured at intervals of 5mm oneach circumference, a method by arranging the positioning disc on a large workbench of a Rockwell hardness tester is adopted, so that the accuracy of the hardness of 18 points at the distance of 30mmfrom the end portion is ensured, and the hardness of different cutter ring test pieces at the same position is basically consistent under the same heat treatment condition.
Description
technical field [0001] The invention belongs to the technical field of roadheader cutter ring detection, and in particular relates to a gradient hardness detection device and method for the section of a roadheader hob cutter ring. Background technique [0002] The hob cutter ring is a key part of the construction of the full-face tunnel boring machine. The industry standard stipulates that the hardness of the cutter ring along the axial section should be 58-62HRC, which has good wear resistance. In addition to normal fatigue wear, overall fracture will also occur. Through the analysis of technical means, it is known that the main reason for the failure of the overall fracture is that when the cutter ring is subjected to a large impact load, the micro-cracks inside the cutter ring part form transgranular fracture along the grain boundary. The main reason for this kind of overall fracture failure is to pursue high wear resistance of parts, while ignoring the plasticity of mat...
Claims
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IPC IPC(8): G01N3/44
CPCG01N3/44
Inventor 张凌张爱武于永生
Owner 维尔特科创技术服务(北京)有限公司