CN104707867A

CN104707867A - Method using phi-180 round billet as raw material of Morgan five-generation high-speed wire rod mill

Info

Publication number: CN104707867A
Application number: CN201410813455.5A
Authority: CN
Inventors: 雷虎; 张丽
Original assignee: Baotou Iron and Steel Group Co Ltd
Current assignee: Baotou Iron and Steel Group Co Ltd; Inner Mongolia Baotou Steel Union Co Ltd
Priority date: 2014-12-24
Filing date: 2014-12-24
Publication date: 2015-06-17

Abstract

The invention relates to a method using a phi-180 round billet as a raw material of a Morgan five-generation high-speed wire rod mill. According to the method, hole type system parameters are set, the sequence of frames is from the number one to the number six, and the hole type shape changes from oval to round to oval to round to oval to round; the upper end face and the lower end face of a guide and guard device are in inner arc shapes matched with hole types. By changing the shape and the size of a hole type system and the shapes of the upper end face and the lower end face of the guide and guard device, the guide and guard device is matched with the hole types, so that the phi-180 round billet is used as the raw material of the five-generation Morgan high-speed wire rod mill.

Description

Use ￠ 180 circle base as the method for the root five generation high-speed rod-rolling mill raw material that rubs

Technical field

The present invention relates to a kind of ￠ of use 180 circle base as the method for the root five generation high-speed rod-rolling mill raw material that rubs, belong to high-speed rod-rolling mill production field.

Background technology

Wire product occupies important proportion in steel product, also be widely used rolling shapes in national economy and capital construction, high-speed rod-rolling mill has rolling high speed, product high-quality, the features such as equipment high efficiency rate, adopt high-speed wire rolling Technical facilities in production, it is the important means of increase line section product quality and competitiveness, also be one of focus of current domestic Iron & Steel Development, the how positive work carrying out this respect, from technological innovation, equipment upgrading, the various aspects such as product development meet the needs in market better, have reality, important meaning, from 1986 to 2013, China builds together and is provided with more than 190 high-speed wire production line, the existing main type of domestic high line rubs root, western mark-De Make, Da Nieli, A Xiluo, and oneself design domestic etc.At present, China has become that to have high-speed wire production line in the world maximum, the country that output is the highest.The blank that major part high-speed rod uses is 120 ²-150 ²continuous casting billet or Concasting Bloom, due to the difference of manufacturing enterprise's inner blank supply form or because indivedual steel grade is (as high-level cold-forging steel, high carbon wire rod) requirement of rolling reduction is different, often need the blank using some special requirements, meet the needs of onsite application, therefore need how to use ￠ 180 circle base to carry out tackling key problem exploitation for high-speed rod-rolling mill, technical difficult points is because domestic same type units is as Hunan steel, Hangzhou Steel Company, Xinjiang Aug. 1st steel mill etc. does not use round base to experience as the production of raw material, it steel wire rod factory adopted ￠ 150 circle base to produce SWRCH82B pertinent literature report, but ￠ 150 circle base sectional area is only ￠ 180 circle base 69.5%, if the difficult point adopting ￠ 180 circle base to exist as blank successfully can be developed be: 1, the cross-sectional area of ￠ 180 circle base is 1.13 times of 150X150 square billet, it is 1.44 times of ￠ 150 circle base, need to distribute mill load uniformly, could effectively avoid single chassis drafts and load excessive, 2, existing pass schedule is: case-side-ellipse-circle ￠ 180 circle base is adopted to need to redesign rational pass schedule as blank, namely continuous rolling constant will be ensured, avoid the generation that rolling defect is folding again, 3, rational guide unit design is the key of steel rolling process direct motion, therefore also need to design a set of guide and guards matched with pass schedule and scene, but also its economy will be considered.

Summary of the invention

The object of the present invention is to provide a kind of ￠ of use 180 circle base as the method for the root five generation high-speed rod-rolling mill raw material that rubs.

Technical solution

The technical solution adopted for the present invention to solve the technical problems is as follows:

Pass schedule size and lengthening coefficient: sortie is 1#-6#, and pass shape is; Oval-circle-oval-circle-oval-circle, wherein: oval groove width W=133-205mm, oval groove depth H=31-60 mm, oval roll gap S=13-18 mm; The dark H=23-60 mm of circular groove wide W=79-150mm circular groove, oval roll gap S=13-20 mm;

The upper surface of 2# inlet guide and lower surface are respectively inner circle arc, and match with pass.

Beneficial effect

1, blank source is widened, 2, compression ratio (overall compression ratio adds 1.13 times) is added, well can improve the comprehensive mechanical performance of steel by increasing compression ratio to some high-grade steel, 3, when length is equal, coil substance and add 11.3%, improve milling train production efficiency, 4, for adopting other base type to provide design reference.

Pass of the present invention, by changing the shape of system shape and size and guide and guard upper and lower end face, makes guide and guard and pass match, and completes the use of ￠ 180 circle base as the root five generation high-speed rod-rolling mill raw material that rubs.

Accompanying drawing explanation

Fig. 1 is oval groove structural representation of the present invention;

Fig. 2 is circular hole structural representation of the present invention;

Fig. 3 entrance rolling, guiding guide roller structure of the present invention schematic diagram;

Fig. 4 roll mounting structure schematic diagram of the present invention;

Fig. 5 improves front entrance rolling, guiding guide roller structure schematic diagram.

Detailed description of the invention

Reasonable set of the present invention pass schedule size and lengthening coefficient: sortie is 1#-6#, pass shape is; Oval-circle-oval-circle-oval-circle, wherein: oval groove width W=133-205mm, oval groove depth H=31-60 mm, oval roll gap S=13-18 mm; The dark H=23-60 mm of circular groove wide W=79-150mm circular groove, oval roll gap S=13-20 mm;

The upper surface of guide and guard and lower surface are respectively inner circle arc, and match with pass, and guide and guard and pass are matched, and complete the use of ￠ 180 circle base as the root five generation high-speed rod-rolling mill raw material that rubs.

The present invention is compared with the prior art example:

Former pass schedule and lengthening coefficient are in table 1:

The pass rolling the first six rolling mill only listed slightly by upper table, consider: 1, change its sectional area of ￠ 180 circle base into by 150X150 square billet and add 11.3%, utilize the ability of the first six rolling mill existing, heavy reduction (in hole type design, breakdown pass suggestion adopts heavy reduction) just can be adopted to digest have more 11.3%, 2, because blank changes ￠ 180 circle base into, as the homogeneous deformation adopting case-side or side-square groove to be unfavorable for circle base, and easily produce the defects such as folding, therefore adopt ellipse-circular hole system.

Pass schedule size of the present invention and lengthening coefficient are as following table 2:

According to each sortie lengthening coefficient of upper table, export rolled piece red base sectional area to 6# just substantially identical with former design, reach the expection object of design, Fig. 1-Fig. 2 is shown in by each sortie pass of 1-6# frame.

2, guide and guards design

According to the pass figure of every rolling mill, just can import and export to this rolling mill the design that guide and guards is carried out in guide and guard, consider economy and versatility, 1# is imported and exported, 2# exports, 3# imports and exports, 4# imports and exports, 5# imports and exports, 6# imports and exports on the basis that original profile remains unchanged, because 1# pass changes slotted eye into by original box-section strut, so 1# milling train shape of rolling piece out just becomes ellipse from rectangle, former 2# inlet guide adopts the rolling guide of plane deflector roll assembling, the shape and size of lipstick base are gone out according to present 1#, 2# entrance deflector roll profile is changed into cylindrical (as Fig. 3-Fig. 4) with pass by flattened cylinder (as Fig. 5).

3, the processing of roll, guide and guards and pre-assembled

According to roll pass Fig. 1 and Fig. 2, carry out the making of model, then carry out the processing of roll, assembling, according to roll pass figure, guide and guard are imported and exported to each sortie and process, assemble.

The present invention is improved by breaker roll hole type design, guide and guard, processing and the preparation of rolling tool are carried out, after blank and rolling tool are ready to complete, produce as a trial, steel grade is SAE1008B, and specification is ￠ 18, between trial production period, process stabilizing, product surface quality, dimensional accuracy and performance meet standard-required, check that appearance and size (operative norm GB/T14981-2009) is in table 3:

Table 3 product design size (specification: Φ 6.5)

Field test performance is in table 4

Table 4 SWRCH22A properties of product

Explanation rubs the technological development of root five generation high-speed rod-rolling mill use ￠ 180 circle base successfully.

Claims

1. use ￠ 180 circle base as the method for the root five generation high-speed rod-rolling mill raw material that rubs, it is characterized in that, 1) pass systematic parameter is set: sortie is respectively 1#-6#, pass shape is: oval-circle-oval-circle-oval-circle, wherein: oval groove width W=133-199mm, oval groove depth H=31-60 mm, oval roll gap S=13-18 mm; The dark H=23-60 mm of circular groove wide W=79-150mm circular groove, oval roll gap S=13-20 mm; 2) upper surface of 2# inlet guide and lower surface are respectively inner circle arc, and match with pass.