Method for rapidly measuring large bending deformation of bar
A measurement method and bending deformation technology, applied in metal processing, metal processing equipment, manufacturing tools, etc., can solve the problems of large workload, low efficiency and low precision, and achieve the effect of high-efficiency and high-precision bending detection
Active Publication Date: 2019-07-30
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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[0004] The purpose of the present invention is to solve the technical problems of large detection error, low precision, heavy workload and low efficiency existing in the detection method of the bending degree of the bar, and to provide a high-precision fast measurement method for large bending deformation of the bar
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[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0028] like figure 1 As shown, a rapid measurement method for large bending deformation of rods in this embodiment uses laser scanning equipment 1 to obtain the cross-sectional profile data of curved rods 3, and after data filtering and denoising, ellipse fitting is performed to obtain cross-sectional ellipses Center coordinates, at the same time take the center point of the ideal axis as the origin, establish the ideal axis of the bar, use polar coordinates to process the difference between the center of each section and the ideal axis, and obtain the deviation angle and deviation radius of the bar in the axial direction, that is, the bending deflection, to achieve Bending measurement and analysis of bars along their entire axial direction.
[0029] The concrete steps of described fast measuring method are:
[0030] 1) Place the bent bar 3 on the su...
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The invention relates to a method for rapidly measuring the large bending deformation of a bar, and belongs to the technical field of bar straightening detection. The method mainly solves the technical problems that an existing bar bending degree detection method is large in detection error, low in precision, large in workload and low in efficiency. According to the technical scheme, laser scanning equipment is used for acquiring outline data of each section of the bent bar, data filtering and denoising are carried out, and ellipse fitting is carried out, the center coordinates of the elliptical center of each section are obtained, and meanwhile, a reference axis is established by using the fitting elliptical centers at the two ends of the bar, and then the difference value between the center of each section and the ideal axis is processed through polar coordinates, the deviation angle and the deviation radius of the bar in the axial direction are obtained, and the whole axial bendingmeasurement and analysis of the bar are realized. The method has the advantages that high-precision bending detection can be realized rapidly and efficiently in the straightening process, and meanwhile, the size parameters and the surface quality of the bar can be analyzed, and a basis is provided for bar production, processing and the like.
Description
technical field [0001] The invention relates to a rapid measurement method for large bending deformation of a bar, which belongs to the technical field of bar straightening detection. It is suitable for bending measurement in the straightening process of bar parts such as tubes and shafts, and also suitable for measurement during bending processing of bars such as tubes and shafts. Background technique [0002] In the production process of bar parts such as tubes and shafts, such as after rolling, forging and heat treatment, due to the influence of various factors, large bending deformation often occurs, resulting in shape defects. In order to reduce bending deformation and improve Material utilization, so this type of parts must be straightened. For parts such as pipes and shafts, the pressure straightening process is mainly used, that is, the three-point bending straightening theory is used to achieve straightening. [0003] Pressure straightening process In the straight...
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IPC IPC(8): B21C51/00
CPCB21C51/00
Inventor 要志斌黄庆学马立峰田雅琴眭东亮崔泰毓马乐乐
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY