A device and method for precise positioning of copper-nickel alloy pipe wall thickness

Abstract

The invention provides a device for accurately positioning the wall thickness of a copper-nickel alloy tube, which includes a movable core head. A stepped installation groove is arranged on the movable core head. A tension sensor is arranged in the stepped installation groove. The tension sensor includes a strain gauge structure, a strain gauge The structure matches the stepped installation slot, the tension sensor is connected to one end of the bridge circuit, and the other end of the bridge circuit is connected to the detector through a cable. The invention provides a copper-nickel alloy pipe wall thickness precise positioning and drawing method, which has high operability. The strain gauge structure is located in the conical section of the core head, which can detect the strain without being affected by the front cylindrical section of the swimming core head. The effect of large stress greatly improves the structural life of the strain gauge, and the use of precise output potential control parameters ensures that the displacement of the swimming core is monitored and can effectively identify pipes with poor dimensional accuracy.

Description

technical field [0001] The invention relates to the technical field of manufacturing copper-nickel alloy pipes, in particular to a device for precisely positioning the wall thickness of copper-nickel alloy pipes and a method thereof. Background technique [0002] Since the invention of the drawing process, the wall thickness precision control of the pipe has experienced several development stages from the short core head, the long core rod, and the floating core head. Pulling process needs. [0003] The size of the pipe includes outer diameter, wall thickness, inner diameter and length. The outer diameter of the pipe depends on the outer mold; the inner diameter depends on the core head; the length depends on the size of the tube blank and the ability of the drawing equipment; It depends on the outer mold and the core head, and also depends on the accuracy of the tube blank, the state, the lubrication conditions, the accuracy of the core head, and the adaptability to the ou...

AI Technical Summary

Problems solved by technology

[0003] The size of the pipe includes outer diameter, wall thickness, inner diameter and length. The outer diameter of the pipe depends on the outer mold; the inner diameter depends on the core head; the length depends on the size of the tube blank and the ability of the drawing equipment; It depends on the outer mold and the core head, and also depends on the accuracy of the tube blank, the state, the lubrication conditions, the accuracy of the core head, and the adaptability to the outer mold, as well as the precise positioning of the core head in the specific working area of ​​the outer mold.

[0004] The cored head drawing of the pipe is a continuous process of diameter reduction and wall reduction. The positioning accuracy of the core head directly affects the wall thickness accuracy of the drawn pipe with a sufficient length, and the continuous detection of the change of the wall thickness accuracy of these pipes At present, there is no scientific detection method. It is estimated that a dynamic and accurate detection and control method of the moving core head during the drawing process must be found to determine the magnitude of the displacement of the moving core head during the drawing process.

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