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Mandril with conical end part

A mandrel and taper technology, applied in the direction of metal rolling, metal processing equipment, mandrel, etc., can solve the problem of thickening at the end of the steel pipe, and achieve the effect of reducing the cutting head and improving the yield.

Pending Publication Date: 2020-05-15
DAYE SPECIAL STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention can effectively solve the problem of thickening at the end of the steel pipe after diameter reduction, so as to achieve no thickened end of the steel pipe after production, reduce the cutting of the steel pipe, and increase the yield

Method used

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  • Mandril with conical end part
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  • Mandril with conical end part

Examples

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Embodiment Construction

[0028] The present invention will be described in detail below with reference to the accompanying drawings and examples. Each example is provided by way of explanation of the invention, not limitation of the invention. In fact, those skilled in the art will recognize that modifications and variations can be made in the present invention without departing from the scope or spirit of the invention. For example, features illustrated or described as part of one embodiment can be used on another embodiment to yield a still further embodiment. Therefore, it is intended that the present invention includes such modifications and variations as come within the scope of the appended claims and their equivalents.

[0029] In the description of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", " The orientations or positional relationships indicated by "top", "bottom", etc. are based on the orienta...

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Abstract

The invention provides a mandril with a conical end part. The mandril with the conical end part comprises a mandril main body and mandril head parts, wherein one mandril head part is arranged at eachof two ends of the mandril main body, the two mandril head parts are arranged in a mirror image manner, the outer diameter of the mandril main body is larger than that of the each mandril head part, the each mandril head part is composed of a first frustum section and a cylindrical section, the large ends of the first frustum sections are connected with one ends of the cylindrical sections, the other ends of the cylindrical sections are connected with the mandril main body through steps, the steps are second frustum sections, the large ends of the second frustum sections are connected with theother ends of the cylindrical sections, and the small ends of the second frustum sections are connected with the mandril main body. The mandril with the conical end part can effectively solve the problem that the end parts of a steel pipe are thickened after reducing is performed, so that the steel pipe has no thickened ends after production, the steel pipe end cutting is reduced, and the yield is improved.

Description

technical field [0001] The invention relates to the field of manufacturing special steel equipment, in particular to a mandrel with a tapered end. Background technique [0002] In the production of hot-rolled seamless steel pipes, the production process can be summarized into six major processes: billet production process, heating process, piercing process, rolling tube extension process, sizing (reduction) diameter process and finishing process, of which the basic three A deformation process: piercing, piercing a solid tube blank into a hollow blank tube; rolling, rolling a hollow blank tube with a certain wall thickness to obtain a blank tube close to the outer diameter and wall thickness of the finished tube; sizing and reducing (Including tension reduction and micro-tension reduction), under a certain total reduction rate and a reasonable single-stand reduction rate, the steel pipe is rolled into a finished tube that meets the requirements of outer diameter and wall thic...

Claims

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Application Information

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IPC IPC(8): B21B25/00
CPCB21B25/00
Inventor 曹玉鑫何新田吴虎张万超周维华
Owner DAYE SPECIAL STEEL CO LTD
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