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Technologic process and special apparatus for rolling seamless steel pipe

A seamless steel pipe and process technology, applied in the field of seamless steel pipe rolling, can solve the problems of narrow specification range and can only meet small batch production, and achieve the effect of highlighting substantive characteristics and expanding the range of product specifications

Inactive Publication Date: 2007-11-07
烟台鲁宝钢管有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention mainly solves the problem that the existing seamless steel pipes have a relatively narrow range of product specifications and can only meet small batch production

Method used

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  • Technologic process and special apparatus for rolling seamless steel pipe
  • Technologic process and special apparatus for rolling seamless steel pipe
  • Technologic process and special apparatus for rolling seamless steel pipe

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Embodiment 1, with reference to Figures 1, 2, and 3, the tube blank is heated to the required temperature by the tube blank heating furnace 1, and then the solid tube blank is pierced into a hollow capillary tube by the piercer 2, and the tube is expanded by two-roll cross rolling The machine 6 reduces the capillary wall and expands the diameter, and the diameter of the steel pipe can be enlarged by 15 to 60% according to the needs, and then the steel pipe is leveled by the leveling machine 4 to further improve the inner and outer surface quality and wall thickness accuracy of the steel pipe, and then the micro tension sizing machine 5. Round the steel pipe to obtain the seamless steel pipe with the required diameter.

[0022] The above-mentioned two-roll cross rolling pipe expander 6 is composed of two rolls 7, a plug 8 and two guide plates 9, two guide plates 9 are installed between the two rolls 7, and the plug 8 is installed in the center of the two guide plates 9; ...

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Abstract

The present invention discloses technological process and special apparatus for rolling seamless steel pipe. The technological process includes the steps of: heating in a heating furnace, perforating in a perforating machine, expanding in a two-roll skew rolling pipe expander, leveling in a leveling machine and sizing in a sizing mill. The two-roll skew rolling pipe expander therefor consists of two rolls, one forcer and two guide plates. The present invention has low apparatus investment, and can meet the requirement in rolling seamless steel pipe with wide size range and great batch.

Description

Technical field: [0001] The invention relates to the technical field of rolling seamless steel pipes, in particular to a rolling process and special equipment for seamless steel pipes, that is, to produce seamless steel pipes by expanding the diameter of a two-roll cross-rolling unit. Background technique: [0002] At present, in the production of seamless steel pipes, the two-roll cross-rolling unit is an important production method. Its technological process is tube billet: Heating furnace heating - piercing machine piercing - two-roll cross rolling pipe mill rolling - skin pass mill leveling - (micro tension) sizing machine sizing; in the above process, the heating furnace The role of the tube is to heat the tube to a suitable temperature for deformation; the role of the piercer is to pierce the solid tube into a hollow capillary; the role of the two-roll cross-rolling mill is to reduce the wall extension; Further precision rolling to improve the quality of the inner and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B19/02B21B37/78
Inventor 王旭午
Owner 烟台鲁宝钢管有限责任公司
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