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CN-122008523-A - Forming system and method for thin-wall steel wire reinforced composite pipe

CN122008523ACN 122008523 ACN122008523 ACN 122008523ACN-122008523-A

Abstract

The invention relates to the technical field of defect detection of composite tube forming, in particular to a forming system and a method for a thin-wall steel wire reinforced composite tube, wherein after the composite tube is extruded by a forming machine, a fluorescent coating module continuously coats a fluorescent monitoring area on the surface of the composite tube, an optical detection module acquires a first comparison parameter and a second comparison parameter according to the concentration comparison result of a local fluorescent marker, a defect recognition module judges whether the surface of the composite tube has a local shrinkage defect, a defect feature type is determined by a defect feature aggregation module, and a targeted regulation and control mode is determined by a forming regulation and control module; the forming method provided by the invention determines different regulation and control modes of the forming machine according to different defect characteristic categories of the composite pipe. And furthermore, the method realizes the targeted identification and quantitative analysis of the local shrinkage defects caused by uneven melting of the reclaimed materials and the difference of the supporting stress of the steel wires in the plastic cooling shrinkage process, and improves the molding qualification rate and the production efficiency of the composite pipe.

Inventors

  • HUANG RENGUO
  • HUANG GUIBIN
  • LI YIXIN

Assignees

  • 兰州威程管业有限公司

Dates

Publication Date
20260512
Application Date
20260317

Claims (10)

  1. 1. A system for forming a thin-walled steel reinforced composite pipe, comprising: A molding machine for extruding the composite tube; A fluorescent coating module for continuously coating a circular fluorescent monitoring area on the surface of the composite tube at preset distance intervals; the optical detection module is connected with the fluorescent coating module and used for acquiring a first comparison parameter and a second comparison parameter of the fluorescent monitoring area according to the local fluorescent marker concentration comparison result of the fluorescent monitoring area; The first comparison parameter and the second comparison parameter are different in division mode of the fluorescence monitoring area in the acquisition process; The defect identification module is connected with the optical detection module and used for respectively determining comparison results of the first comparison parameter and the second comparison parameter with corresponding preset reference parameters so as to judge whether the surface of the composite pipe has a local shrinkage defect or not; The defect characteristic aggregation module is respectively connected with the optical detection module and the defect identification module and is used for counting the numerical values of the first comparison parameters and the second comparison parameters in a plurality of continuously acquired fluorescence monitoring areas so as to determine defect characteristic categories; And the molding regulation and control module is respectively connected with the defect characteristic polymerization module and the molding machine and used for determining a regulation and control mode of the molding machine according to the defect characteristic category, and comprises the steps of adjusting the arrangement density of axial steel wires or radial steel wires or adjusting the extrusion rate.
  2. 2. The system of claim 1, wherein the optical detection module is configured to obtain a first comparison parameter based on a comparison of local fluorescent marker concentrations in the fluorescent monitoring region, The optical detection module divides the fluorescence monitoring area into two radial subareas by taking the diameter perpendicular to the axial direction of the composite tube as a reference, calculates the concentration difference value of the fluorescent marker in the two radial subareas, and determines the concentration difference value of the fluorescent marker as the first comparison parameter.
  3. 3. The system of claim 1, wherein the optical detection module is configured to obtain a second comparison parameter according to a comparison result of the local fluorescent marker concentration in the fluorescent monitoring region, wherein, The optical detection module divides the fluorescence monitoring area into two axial subareas by taking the diameter parallel to the axial direction of the composite tube as a reference, calculates the concentration difference value of the fluorescent marker in the two axial subareas, and determines the concentration difference value of the fluorescent marker as the second comparison parameter.
  4. 4. The system of claim 1, wherein the defect recognition module is configured to determine whether a localized shrinkage defect is present on the surface of the composite tube, wherein, The defect identification module compares the first comparison parameter with a first preset reference parameter, and compares the second comparison parameter with a second preset reference parameter; And if the first comparison parameter is larger than the first preset reference parameter or the second comparison parameter is larger than the second preset reference parameter, the defect identification module judges that the surface of the composite pipe has a local shrinkage defect.
  5. 5. The system of claim 4, wherein the defect feature aggregation module is configured to count values of the first comparison parameter and the second comparison parameter, wherein, The defect characteristic aggregation module compares the numerical values of the first comparison parameter and the second comparison parameter for a plurality of continuously acquired fluorescence monitoring areas one by one, counts the occurrence times of the numerical value of the first comparison parameter being larger than that of the second comparison parameter, and calculates the ratio of the occurrence times to the acquisition times of the fluorescence monitoring areas.
  6. 6. The system of claim 5, wherein the defect signature aggregation module is configured to determine a defect signature class based on the ratio, wherein, The defect characteristic aggregation module compares the ratio with a preset first ratio reference value and a preset second ratio reference value respectively; if the ratio is greater than the first ratio reference value or the ratio is less than the second ratio reference value, the defect feature aggregation module determines that the local shrinkage defect is a first defect feature type; If the ratio is smaller than or equal to the first ratio reference value and the ratio is larger than or equal to the second ratio reference value, the defect feature aggregation module determines that the local shrinkage defect is of a second defect feature type; the first ratio reference value is greater than the second ratio reference value.
  7. 7. The system of claim 6, wherein the molding control module is configured to determine a control mode of the molding machine based on the defect feature type, wherein, If the local shrinkage defect is the first defect characteristic category, the forming regulation and control module controls the forming machine to adjust the arrangement density of the axial steel wires or the radial steel wires; And if the local shrinkage defect is the second defect characteristic category, the molding regulation and control module adjusts the extrusion rate of the molding machine.
  8. 8. The system for forming a thin-walled steel reinforced composite pipe according to claim 7, wherein the forming control module is configured to control the forming machine to adjust the arrangement density of the axial steel wires or the radial steel wires, wherein, If the ratio is larger than the first ratio reference value, the forming regulation and control module increases the arrangement density of the radial steel wires, and the arrangement density increase of the radial steel wires is positively correlated with the ratio; and if the ratio is smaller than the second ratio reference value, the forming regulation and control module increases the arrangement density of the axial steel wires, and the arrangement density increase of the axial steel wires is inversely related to the ratio.
  9. 9. The system for forming a thin-walled steel wire reinforced composite pipe of claim 7, wherein the forming control module is configured to control a forming machine to reduce extrusion rate.
  10. 10. A method for forming a thin-walled steel wire reinforced composite pipe, for use in the system for forming a thin-walled steel wire reinforced composite pipe as claimed in any of claims 1 to 9, comprising: continuously coating circular fluorescence monitoring areas on the surface of the extruded composite pipe at preset distance intervals; according to the local fluorescent marker concentration comparison result of the fluorescent monitoring area, a first comparison parameter and a second comparison parameter of the fluorescent monitoring area are obtained, and the dividing modes of the fluorescent monitoring area in the process of obtaining the first comparison parameter and the second comparison parameter are different; Respectively determining comparison results of the first comparison parameter and the second comparison parameter with corresponding preset reference parameters, and judging whether the surface of the composite pipe has a local shrinkage defect or not based on the comparison results; Responding to the judging result of the local shrinkage defect on the surface of the composite tube, and counting the numerical values of a first comparison parameter and a second comparison parameter in a plurality of continuously acquired fluorescence monitoring areas to determine the defect characteristic category; and determining a regulation and control mode of the forming machine according to the defect characteristic category, wherein the regulation and control mode comprises the steps of adjusting the arrangement density of axial steel wires or radial steel wires or adjusting the extrusion rate.

Description

Forming system and method for thin-wall steel wire reinforced composite pipe Technical Field The invention relates to the technical field of defect detection of composite tube forming, in particular to a system and a method for forming a thin-wall steel wire reinforced composite tube. Background The thin-wall steel wire reinforced composite pipe has the characteristics of corrosion resistance of plastics and structural support of the steel wires, is widely applied in the fields of water supply and drainage, gas transmission, industrial fluid transmission and the like, the molding quality of the thin-wall steel wire reinforced composite pipe directly determines the pressure resistance, the sealing performance and the service life of the pipe, currently, in order to respond to the environment-friendly policy and the resource recycling requirement, more and more regenerated plastics are applied to extrusion molding of the composite pipe, the regenerated plastics have the characteristics of uneven local shrinkage and the like due to uneven melt flow performance, different impurity distribution and the like, the molding defect of uneven local shrinkage is more likely to occur in the extrusion cooling process, and the axial and radial arrangement supporting characteristics of the steel wires are not matched with the shrinkage stress of the plastics, so that the defect is further aggravated. The prior art adopts manual spot check or simple appearance detection mode to judge the molding quality, lacks real-time and accurate detection means for the shrinkage state of the surface of the pipe, and the application of the reclaimed plastic ensures that the shrinkage characteristic in the molding process of the composite pipe is more complex, so that the problems of local wall thickness deviation, surface microcracking and the like are easy to occur, thereby not only reducing the product qualification rate of the pipe, but also limiting the mass production of the reclaimed plastic in the production of the thin-wall steel wire reinforced composite pipe, and being unfavorable for the improvement of the plastic recycling industry chain and the development of green manufacturing. For example, china patent publication No. CN116228769A and 2023-06-06 discloses a device and a method for detecting flaws of a steel wire braided tube, which comprise an image acquisition device, an image segmentation module and an image analysis module which are connected in sequence. The image acquisition device is used for acquiring surface images of the woven tube, the image segmentation module is used for positioning flaw areas and generating flaw images, the image analysis module classifies the flaw images through a convolutional neural network, the image segmentation module comprises a stacked self-encoder, a binarization module and an image clipping module, the stacked self-encoder is used for converting an input image into a prediction mask, the binarization module is used for binarizing the prediction mask to obtain accurate flaw contours, and the image clipping module is used for extracting minimum closed rectangular areas according to the flaw contours and clipping the minimum closed rectangular areas according to the flaw contours to obtain flaw images. The prior art can not conduct targeted identification and quantitative analysis on local shrinkage defects caused by uneven melting of reclaimed materials and different supporting stress of steel wires in the plastic cooling shrinkage process, and does not match regulation and control strategies aiming at shrinkage defects with different causes, so that the molding qualification rate and the production efficiency of the composite pipe are affected. Disclosure of Invention Therefore, the invention provides a system and a method for forming a thin-wall steel wire reinforced composite pipe, which are used for solving the problems that the prior art cannot conduct targeted identification and quantitative analysis on local shrinkage defects caused by uneven melting of reclaimed materials and different steel wire supporting stress in the plastic cooling shrinkage process and does not match regulation strategies for shrinkage defects with different causes. In order to achieve the above object, the present invention provides a molding system of a thin-walled steel wire reinforced composite pipe, comprising: A molding machine for extruding the composite tube; A fluorescent coating module for continuously coating a circular fluorescent monitoring area on the surface of the composite tube at preset distance intervals; the optical detection module is connected with the fluorescent coating module and used for acquiring a first comparison parameter and a second comparison parameter of the fluorescent monitoring area according to the local fluorescent marker concentration comparison result of the fluorescent monitoring area; The first comparison parameter and the second comparison parameter are differe