CN103212592A

CN103212592A - Steel pipe shape adjusting method

Info

Publication number: CN103212592A
Application number: CN2012100155624A
Authority: CN
Inventors: 李路华
Original assignee: ZHUJIANG STEEL PIPE CO Ltd PANYU
Current assignee: Panyu Chu Kong Steel Pipe Zhuhai Co ltd
Priority date: 2012-01-18
Filing date: 2012-01-18
Publication date: 2013-07-24
Anticipated expiration: 2032-01-18
Also published as: CN103212592B

Abstract

The steel pipe adjustment method of the present invention belongs to the field of steel pipe manufacturing and processing. During the roll change, a long pipe is prepared. The length of the long pipe is equivalent to the distance from the flying saw to the extrusion roller. The seam must face up, the weld seam to the weld seam, after each girth weld seam is welded, use a grinder to smooth the weld scar and the excessively high weld seam, and then use the power of the sizing roller to run in reverse, Put the welded long pipe from the flying saw through the replaced straightening roller, sizing roller and water cooling, air cooling section to the polishing roller, and connect with the front end of the steel pipe passing through the extrusion roller, the sizing roller, straightening roller , adjusted frame by frame, the flying saw adjusted the height and cutter distance parameters, after the traction tube and the tube at the high frequency are connected, start the rolling mill, and pull out the welded tube at one time. The invention can quickly and conveniently produce qualified pipes.

Description

Steel pipe tune type method

Technical field

The present invention steel pipe tune type methodbelong to steel pipe manufacture and manufacture field, be mainly used in the ERW steel pipe's production, a kind of method of tune type poling after roll change.

Background technology

At present, in the ERW steel pipe's production, change roll post debugging poling, all will run into and can not once the steel pipe after welding be passed to the problem that flies saw smoothly.Cause the reason of this phenomenon to mainly contain: 1. in the poling process, steel pipe is to take format roll as driving force, is pushing away the steel pipe welded and is going ahead, and the steel pipe front end does not have tractive force, easily causes weld seam deflection; 2. the device layout of medium-large caliber ERW tubulation unit distance is all long, and the rolling centerline deviation of roll, cause weld seam deflection; 3. pipe at shaping area, compression roller place unbalance stress with carry out weld seam heat treatment, causes the perk of steel pipe head and weld seam deflection.

In most cases, finish changing first poling after roll and cross intermediate frequency heat treatment, air cooling, water-cooled, size rolls, smoothing roll, fly saw, at least want disorderly closedown could pass more than 3 times and fly to saw.Each shutdown all produces the disconnected welded tube of 10 meters long and (comprises and shutting down while restarting; heat treatment, the length that welding temperature is not enough, outer burr has not been removed); so each roll change poling tune type is produced to normal, at least will produce the long defective pipe of 30--40 rice, just can produce qualified pipe.When the material used, not at ordinary times, moulding welding fluctuation is large for the plate face, and the easy deflection of weld seam causes steel pipe seriously crooked, can not be smoothly by sizing, fly to saw operation, adjust also very difficult, and length consuming time, have a strong impact on manufacturing schedule.While particularly producing the pipe with small pipe diameter steel pipe, weld seam deflection is fast, and interior cutter is very easily scraped partially, causes Removing of inner burs undesirable, and slot scraping or inner burr are not scraped totally, affects product quality and increases the workload that postorder is processed; Also cause in addition welding seam bias intermediate frequency inductor center, cause weld seam heat treatment insufficient, the steel pipe of producing does not reach standard-required, product is remodeled, change roll post debugging poling, can not once the steel pipe after welding be sawed through flying smoothly, cause larger waste, these all have a strong impact on the lumber recovery that the small lot order is produced.

Summary of the invention

The object of the invention is to avoid weak point of the prior art, and a kind of time that shortens steel pipe tune type poling is provided, reduce the quantity of defective pipe in tune type poling process, improve product percent of pass, reduce production costs steel pipe tune type method.

The objective of the invention is to reach by following measures, of the present invention steel pipe tune type method is as follows,

?during roll change, prepare long tube, the length of long tube and the distance that flies to cut compression roller are quite, the welded tube docking that long tube is identical with specification, the weld seam of long tube all will be upward, the weld seam butt welded seam, after each girth joint has welded, to crator and too high welding seam grinding be put down with abrasive machine, then utilize the power of size rolls, inverted running, by the long tube welded, from flying saw through the smoothing roll of having finished changing, size rolls and water-cooled, the air cooling section is to burnisher, with the steel pipe front end of crossing compression roller, dock, size rolls, smoothing roll, by frame, adjust, fly the saw adjust the height and cutter apart from parameter, until the pipe of traction tube and high frequency treatment to after connecting, start milling train, disposable the pipe welded is pulled out.

The invention has the beneficial effects as follows: than general tune type method, shut down less 3 ~ 4 times, reduce raw material and drop into 30 ~ 40 meters, reduced production cost; Shorten the time of poling tune type, accelerated to produce the progress of debugging; Welding quality stable, be conducive to the removal of inside and outside burr, can quickly and easily qualified pipe be produced.

The accompanying drawing explanation

Accompanying drawing 1 is that ERW steel pipe's production traction method poling tune type high frequency is to flying to saw the post schematic layout pattern;

Accompanying drawing 2 is ERW steel pipe's production traction method poling tune type high frequency post butt tube schematic layout patterns;

Accompanying drawing 3 is ERW steel pipe's production traction method poling tune type air cooling section, water-cooled segment layout schematic diagram;

Accompanying drawing 4 is that ERW steel pipe's production traction method poling tune type flies to saw the post schematic layout pattern;

Below in conjunction with accompanying drawing, the present invention is further described.

As shown in accompanying drawing 1, accompanying drawing 2, accompanying drawing 3, accompanying drawing 4, that the ERW steel pipe's production is drawn method poling tune type high frequency to flying to saw the post schematic layout pattern, be mainly pipe through high-frequency welding-→ IF process-→ the air cooling section-→ water-cooled-→ sizing-→ fly the full mistake of saw cutting. ?during roll change, prepare long tube, the length of long tube and the distance that flies to cut compression roller are quite, the welded tube docking that long tube is identical with specification, the weld seam of long tube all will be upward, the weld seam butt welded seam, after each girth joint has welded, to crator and too high welding seam grinding be put down with abrasive machine, then utilize the power of size rolls, inverted running, by the long tube welded, from flying saw through the smoothing roll of having finished changing, size rolls and water-cooled, the air cooling section is to burnisher, with the steel pipe front end of crossing compression roller, dock, size rolls, smoothing roll, by frame, adjust, fly the saw adjust the height and cutter apart from parameter, until the pipe of traction tube and high frequency treatment to after connecting, start milling train, disposable the pipe welded is pulled out.

Claims

1. one kind steel pipe tune type method is as follows,during roll change, prepare long tube, the length of long tube and the distance that flies to cut compression roller are quite, the welded tube docking that long tube is identical with specification, the weld seam of long tube all will be upward, the weld seam butt welded seam, after each girth joint has welded, to crator and too high welding seam grinding be put down with abrasive machine, then utilize the power of size rolls, inverted running, by the long tube welded, from flying saw through the smoothing roll of having finished changing, size rolls and water-cooled, the air cooling section is to burnisher, with the steel pipe front end of crossing compression roller, dock, size rolls, smoothing roll, by frame, adjust, fly the saw adjust the height and cutter apart from parameter, until the pipe of traction tube and high frequency treatment to after connecting, start milling train, disposable the pipe welded is pulled out.