On-line monitoring method of bent pipe cold extrusion processing quality

Abstract

The invention relates to an on-line monitoring method of bent pipe cold extrusion processing quality. The on-line monitoring method of the bent pipe cold extrusion processing quality is characterized by comprising three steps of on-line signal acquisition, signal analysis processing and on-line control, wherein the on-line signal acquisition comprises the following step of: acquiring the real-time wall thickness and the surface damage condition of a steel pipe by installing a CCD (Charge Coupled Device) sensor used for acquiring image signals and an ultrasonic tester used for measuring bent pipe wall thickness signals on a processing device; the signal analysis processing comprises the following steps of: transferring the signals acquired in every processing process into a computer, fitting the gray level difference X and the bent pipe wall thickness y of an image by adopting a curve fitting algorithm, serving fitted deviation X and deviation variation as the input quantity of a system, wherein the input quantity of the system is generated through a fuzzy algorithm; and then judging whether an extruded product is qualified or not and the grade of the extruded product on line. The invention is simple, easy to operate, high in efficiency and favorable to enhancing the automatic level of bent pipe processing.

Description

technical field [0001] The invention relates to an on-line control method for the processing quality of mechanical and electrical products, in particular to a method for on-line monitoring of the cold extrusion processing quality of bent pipes, in particular to an on-line monitoring method for the cold extrusion processing quality of bent pipes. Background technique [0002] At present, pipe bending processing technology is widely used in petrochemical, automobile, aerospace, shipbuilding and other fields. With the continuous advancement of science and technology and the rapid development of industrial production, the requirements for the quality and safety performance of bent pipe products are getting higher and higher. [0003] At present, in the cold extrusion forming of the bent pipe, a fixed punch force is often used to act on the steel pipe, which makes the whole processing process of the bent pipe bear the same pressure, but due to the degree of deformation and progre...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the cold extrusion quality of the bent pipe must wait for processing due to the inability to perform real-time monitoring and feed back the real-time monitored data to the control system in order to change the size of the cold extrusion force in the existing cold extrusion process of the bent pipe. The inspection can only be carried out after the completion, and the quality of the final product cannot be inspected during the processing process. Invented a method that can monitor the quality of the bent pipe in real time during the cold extrusion process, and adjust it in real time according to the deviation between the monitoring result and the standard data. On-line monitoring method of cold extrusion processing quality of bent pipes by extrusion force to ensure the quality of bent pipes

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