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Tension-reduced rolling mill and its operation method

A tension reducing machine and tension reducing technology, which are applied in rolling mill control devices, driving devices for metal rolling mills, metal rolling, etc. Effect

Inactive Publication Date: 2006-01-18
SMS MEER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Possibility of intensified throwing steel effect when end-of-pipe controls are used

Method used

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  • Tension-reduced rolling mill and its operation method
  • Tension-reduced rolling mill and its operation method
  • Tension-reduced rolling mill and its operation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] exist figure 1 , 2 , schematically shows how two roll pairs 4, 5, 6 or 4', 5', 6' roll a pipe 2 in a tension reducing mill. The rolls 4, 5, 6 belong to the first rolling stand 3a, while the rolls 4', 5', 6' belong to the second rolling stand 3b. The two rolling stands 3a, 3b in turn belong to the first stand group of the tension reducing rolling mill, as will be described further below. In order to make a pipe 2 with a limited length be uniformly rolled on its entire peripheral surface when passing through the tension reducing mill, the rolls of the two rolling stands 3a, 3b arranged in front and behind are respectively rotated by 60° relative to the pipe axis, Such as figure 1 , 2 as clearly shown.

[0026] exist image 3 , schematically shows the structure of the tension reducing mill 1 . In the conveying direction R of the pipe 2, a plurality of rolling stands 3 are arranged one behind the other. In each rolling stand, such as figure 1 , 2 Rollers are provi...

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Abstract

Method of operating a stretch-reducing mill for rolling pipe of finite length, containing, at least, two rolling mills, which are located after each other in the direction of the feed of pipe, moreover in each rolling mill, at least, two interacting rolls are located, each of which on the specific peripheral section of pipe fits closely to it and rolls it, and in this case there is, at least, two drives for the rolls of two different rolling mills. For improvement of quality of further processes method includes the following stages: a) determining a time of point, at which the rear end of the pipe in the direction of feed leaves the last output rolling stand; b) setting of a time interval of prescribed duration, in which time point lies, when the rear end of pipe in the direction of feed leaves the output rolling stand; c) controlling or regulating a drive of output rolling stand in such a manner that during the time interval the drive of the rolls of output rolling stand occurs at reduced frequency of rotation, and the coming out of the pipe with respect to this, generally at constant velocity.

Description

technical field [0001] The invention relates to a method for operating a tension reducing mill for rolling pipes of limited length, said tension reducing mill having at least two rolling stands arranged one behind the other in the pipe conveying direction, wherein in each rolling mill At least two cooperating rolls are set in the frame, and these rolls are respectively attached to a limited part of the outer peripheral surface of the pipe and rolled the pipe. Here, there are at least two rolling machines for driving two different rolling machines. Drives for the rolls of the stand. Furthermore, the invention relates to a device for carrying out the method. Background technique [0002] In tension reducing mills, the pipe to be processed passes through a rolling train in which several rolling stands are arranged one behind the other in the pipe conveying direction. Rollers are supported in each stand, which each contact a limited partial outer circumference of the tube duri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/78B21B15/00B21B17/14B21B35/02
CPCB21B17/14B21B2273/18B21B2275/04B21B2275/06B21B2273/20B21B35/025B21B37/78B21B2015/0014
Inventor H·J·佩勒
Owner SMS MEER
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