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A method for measuring shape parameters of cylindrical rods

A measurement method and technology of shape parameters, applied in the field of measurement, can solve problems such as inability to calculate cylindricity, pipe end straightness, etc., and achieve the effect of improving labor efficiency and simplifying work intensity

Active Publication Date: 2019-06-25
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above patents can directly or indirectly measure the roundness and diameter of pipes and rods, but they cannot calculate the cylindricity, pipe end straightness and other dimensions very well.

Method used

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  • A method for measuring shape parameters of cylindrical rods
  • A method for measuring shape parameters of cylindrical rods
  • A method for measuring shape parameters of cylindrical rods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Example 1: Calculating the straightness and coaxiality of the end of the oil well pipe

[0075] In view of the requirement of measuring the straightness and coaxiality of the end of the oil well pipe by using the saddle gauge measurement method manually, the method proposed by this method can be applied to measure in a non-contact, efficient and accurate manner.

[0076] Such as Figure 5 As shown in Fig. 1, a set of measuring sensors are respectively arranged at the end and inside of the oil well pipe, and the positions between the sensors are fixed. Rotate the two sets of sensors, measure two sections at the end and inside of the oil well pipe respectively, calculate the centers C1~C4 of these four sections and connect them, so that the diameter of the pipe end and the centerline C1C2, internal Diameter and centerline C3C4, calculate the angle θ and distance d between two straight lines in the three-dimensional space coordinate system, and characterize the straightne...

Embodiment 2

[0077] Embodiment 2: Calculate steel pipe diameter, roundness and straightness

[0078] Such as Image 6 As shown, multiple groups of sensors are arranged in the length direction of the steel pipe, and the positions between the sensors are fixed and can rotate around the steel pipe on a fixed track. During the measurement, multiple sets of sensors rotate around the steel pipe synchronously to obtain the contour data of multiple sections, and calculate the center C1~C4, circle radius R1~R4, and roundness of each contour circle respectively; connect the circle centers C1~C4 to calculate the The straightness of the connecting line is used to characterize the straightness of the steel pipe.

[0079] The present invention has broad prospects for popularization and application, and can be applied to the parameter measurement of all round rods, pipes and rollers.

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Abstract

The invention provides a cylindrical rod shape parameter measuring method. A group of correlation position measurement sensors are adopted for measurement of outer boundary outline points in the peripheral direction of a cylindrical rod. The sensors are moved and are enabled to circle around the cylindrical rod so as to acquire outline shapes of multiple sections of the cylindrical rod. Through error correction and fitting on relative position relation of the multiple outlines, the roundness and the cylindricity parameters are calculated finally. According to the invention, shape parameter measurement of the cylindrical rod is quantified in high precision and a manual measurement means is replaced, so that detection efficiency and data measurement precision are improved.

Description

technical field [0001] The invention relates to the field of measurement technology, in particular to a method for measuring shape parameters of cylindrical rods. Background technique [0002] Round bar parameter measurement is one of the time-consuming process steps for products produced by pipe, rod and wire manufacturers, but because of the importance of this process, it cannot be omitted. At present, the parameters of round bars, such as: internal and external diameter measurement, roundness measurement, cylindricity measurement, etc., are usually used in conjunction with a variety of instruments and equipment, which brings a lot of inconvenience to the measurement work, and during the measurement process, there will also be Due to the joint application of multiple tools, there will be a certain measurement error. [0003] Chinese patent 201510036516.6 discloses a measuring instrument for inner and outer diameters of seamless steel pipes, which has two support seats arr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/08G01B11/24G01B11/26G01B11/27
CPCG01B11/08G01B11/24G01B11/2408G01B11/26G01B11/27
Inventor 杨水山彭铁根何永辉石桂芬梁爽宗德祥
Owner BAOSHAN IRON & STEEL CO LTD
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