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Process for the dynamic regulation of top head front-extending quantity

A technology of dynamic adjustment and ejector, applied in the direction of rolling mill control device, metal rolling, manufacturing tools, etc., can solve the problems of inconsistent wall thickness of the same steel pipe, inconsistent wall thickness of steel pipe, etc., and achieve uniform and reliable wall thickness. The effect of high sexuality and prominent substantive characteristics

Inactive Publication Date: 2008-01-30
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 purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, and provide a method for dynamically adjusting the extension of the plug, which mainly solves the problem that the wall thickness of the same batch of steel pipes in the existing seamless steel pipe production process is prone to inconsistency and uniformity. The wall thickness of the supporting steel pipe is inconsistent from head to tail

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1, in the pipe expansion process flow of seamless steel pipe production, first number each ejector pin that participates in the cycle, and the host computer can automatically memorize the successive positions of the ejector pins in space, or use the ejector pin code automatic recognition instrument Identify different ejector rods, so as to record the number of steel pipes produced by each plug N, the original outer diameter D of each plug, the unit is mm, the angle α of the uniform wall section of the plug, the wear speed V of the plug, the unit: mm / piece , the length of the ejector rod L, the unit is mm; then the change of the diameter of the plug ΔD=V×N, the unit of ΔD is mm, and the corresponding compensation value of the extension H of the plug is ΔH=ΔD / 2 / TAN(α), the diameter of the plug is worn The automatic compensation of the quantity can be completed within the production gap time; the closed-loop control method is adopted to automatically compensate the ...

Embodiment 2

[0018] Example 2, in the pipe threading process flow of seamless steel pipe production, first number each ejector pin participating in the cycle, the host computer can automatically remember the successive positions of the ejector pins in space, or use the ejector pin code automatic recognition instrument Identify different ejector rods, so as to record the number of steel pipes produced by each plug N, the original outer diameter D of each plug, the unit is mm, the angle α of the uniform wall section of the plug, the wear speed V of the plug, the unit: mm / piece , the length of the ejector rod L, the unit is mm; then the change of the diameter of the plug ΔD=V×N, the unit of ΔD is mm, and the corresponding compensation value of the extension H of the plug is ΔH=ΔD / 2 / TAN(α), the diameter of the plug is worn The automatic compensation of the quantity can be completed within the production gap time; the trend control method is adopted to automatically compensate the thermal expans...

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Abstract

The invention discloses a method dynamically adjusting the front extension quantity of the top head. The invention is characterized in that the invention includes the steps of the record parameters, the automatic supplementation of the abrasion quantity of the top head diameter, the automatic supplementation of the top head and rolling hot expansion which can adopt the closed ring control method or adopt the trend control method and the automatic supplementation of the top rod length L; the front extension quantity is dynamically adjusted in the production clearance time and production time of the pipe expanding or perforation, thus implementing the precision control to the wall thickness of the steel pipe, ensuring the same produced steel pipe have uniform wall thickness and the same batch of steel pipes have basically uniform wall thickness.

Description

Technical field: [0001] The invention relates to the technical field of seamless steel pipe production, in particular to a method for dynamically adjusting the protruding amount of a plug, which is used in the perforation and pipe expansion processes of seamless steel pipes. technical background: [0002] At present, in the seamless steel pipe manufacturing process, piercing and pipe expansion are two important plastic deformation processes. The plastic deformation is completed in the pass. Usually the pass is formed by a pair of rolls and two guide plates. Or guide plate and a plug constitute. Its deformation principle: the actively rotating roll bites the material tube blank or capillary into the deformation zone and repeatedly rolls the lumen wall in the deformation zone together with the plug, so that the wall thickness of the steel pipe in the deformation zone becomes thinner and the diameter becomes larger. The length is extended, and the guide plate or guide plate ac...

Claims

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Application Information

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IPC IPC(8): B21B37/78B21B19/04B21B19/08
Inventor 王旭午李学进杨为国迟黎明张英江
Owner 烟台鲁宝钢管有限责任公司
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