CN1074323C - Sleeving regeneration tech. for cold-rolling working roller - Google Patents
Sleeving regeneration tech. for cold-rolling working rollerInfo
- Publication number
- CN1074323C CN1074323C CN96115540A CN96115540A CN1074323C CN 1074323 C CN1074323 C CN 1074323C CN 96115540 A CN96115540 A CN 96115540A CN 96115540 A CN96115540 A CN 96115540A CN 1074323 C CN1074323 C CN 1074323C
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- China
- Prior art keywords
- roll
- working roll
- cold
- old
- working
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The present invention provides a reproducing technique for sleeves of working rolls of cold rolling mills, which is used for reforming an old cold rolling working roll into a novel cold rolling working roll. The technical process comprises the procedures: soft annealing is carried out to an old working roll, mechanical processing is carried out to a roll shaft to be embedded with a sleeve, a convex shape is formed, a roll sleeve with a concave inner surface is manufactured, the inner surface is matched with the section of the roll shaft to be embedded with a sleeve, a small shrink range (from 0.178 to 0.275mm) is adopted, the roll sleeve is pressed on the roll shaft after heated, and a new roll is formed after mechanical processing is carried out. The production cost of rolls can be lowered by 50% by the technique for reproducing rolls, and technical quality is in accordance with standards fully.
Description
The invention belongs to cold rolling production field, particularly about waste and old cold roll edge cover regeneration technology.
Cold roll mostly is the high alloy forged steel roll, and cost is very high, but service life is very limited, and loss is very big.With one group of four frame tandem mill is example, scraps more than 200 of working roll every year.Every cost 10～200,000 yuan, scrapped very unfortunately, so people are seeking a kind of way of utilizing waste and old working roll always, for example once adopt the method for built-up welding thickening, but its poor effect all fails with problems such as built-up welding material and mother metal junction crack.
The purpose of this invention is to provide a kind of method technology of cold roll of regenerating, thereby reach the purpose of effectively utilizing the waste and old working roll of cold-rolling mill with edge cover.
According to the present invention, the size and dimension of each cold roll is compared the working roll of selecting size and dimension to be close.The waste and old working roll of large-size is changed system into less working roll, and the part big inadequately to original size, particularly roll neck are partly inlayed cover and are processed into new working roll.
According to cold roll edge cover regeneration technology of the present invention, its technical process is made up of the following step:
1) will wait that the waste and old working roll of inlaying cover carries out soft annealing, annealing schedule depends on the working roll material.When cold roll is made, generally all required higher surface hardness,, just be difficult to carry out machining as not annealing.
2) the roll shaft position (being generally certain position of roll neck) of intending inlaying cover is machined to predetermined diameter and processing fineness, and is convex, both sides and middle diameter difference are Δ＞0, to prevent producing axial motion in edge cover back.
3) process roller shell by predetermined inside and outside footpath and length, the convex that its inner surface is spill and manufactured roll shaft corresponding site is complementary, and reaches identical fineness.
4) selecting the less magnitude of interference for use is 0.178～0.275mm, and this general attire magnitude of interference is little by 45%.
5) roller shell is heated, select the higher heat medium of thermal capacity for use, medium temperature is 300～350 ℃, notes measuring the axle sleeve swell increment in the heating process.
6) after axle sleeve adds thermal expansion amount and reaches required value, promptly with forcing press axle sleeve is pressed on the roll shaft, carries out the gentle cold treatment of lonneal afterwards immediately, temperature is 200～250 ℃.
7) the working roll size of making by drawing up is changed a social system the working roll that edge packages, and promptly carries out machining, and modifier treatment and body surface quench, tempering, finally make new working roll.
The working roll that adopts cold roll edge cover regeneration technology of the present invention to regenerate can reach the operating technology quality standard, and required expense is only for buying about 50% of a new roll.
The invention will be further described below in conjunction with embodiment and accompanying drawing.
Fig. 1 is cold continuous rolling φ 600 * 1700mm working roll schematic diagram.
Fig. 2 is single frame planisher φ 540 * 1700mm working roll schematic diagram of edge cover regeneration.
Fig. 3 is the φ 600 * 1700mm working roll schematic diagram after machined.
The roller shell schematic diagram that Fig. 4 applies mechanically for edge.
As an embodiment, with waste and old cold continuous rolling φ 600 * 1700mm working roll (Fig. 1) key cover regeneration list frame planisher φ 540 * 1700mm working roll (Fig. 2), when the material of this working roll was 86CrMoV7, the key of the transformation of the way was the φ 406.4-0.2mm place of φ 600 * 1700mm working roll to be changed system into the φ 431.8mm of φ 540 * 1700mm working roll.Roller shell that will 40mm is thick (Fig. 4) adopts the interference assembly technology to be mounted to φ 406.4mm place, makes its external diameter reach φ 440mm, so that carry out processing and remodelling.According to the present invention, the technical process of inlaying regeneration is:
1) waste and old φ 600 * 1700mm86CrMoV7 working roll (Fig. 1) is annealed by following annealing schedule: annealing temperature is 600～650 ℃, and firing rate≤30 ℃/h are incubated to be cooled in stove below 100 ℃ after 12 hours and come out of the stove.
2) the φ 406.4mm place of the waste and old working roll of φ 600 * 1700mm (Fig. 1) is processed into
, wide 1600mm also is the edge cover section of convex, both sides and middle diameter difference Δ=0.03mm, and processing fineness is
(Fig. 3).
3) making external diameter is φ 440mm, and internal diameter is
Roller shell, inner surface is spill, both sides and mid diameter difference are 0.03mm, inner surface fineness is
(Fig. 4).
4) adopting the less magnitude of interference is 0.178～0.275mm.
5) use machinery oil as heat medium, axle sleeve is heated, heating-up temperature is 300～350 ℃.Note measuring the swell increment of axle sleeve in the heating process.
6) after the swell increment of axle sleeve reaches the required value of hot charging, with forcing press this axle sleeve is pressed on the roll shaft correspondent section, carry out lonneal then immediately, temperature is 200～250 ℃, carries out slow cooling again and handles.
7) be processed into the new planisher working roll of φ 540 * 1700mm according to the size shown in Figure 2 working roll that hot charging is good.Among the figure, 1 is roller shell, and 2 is roll shaft.This new working roll body surface quenching hardness reaches more than the Hs92, and depth of hardening reaches 15mm, inlays axle sleeve hardness greater than Hs50, reaches intrinsic technical quality standard fully.
A wound economic benefit is above more than 1,200,000 yuan with this method reproduction operation roller, year for certain cold rolling mill.This technology is promoted the use of other cold roll also will obtain bigger economic benefit.
Claims (4)
1, a kind of cold roll edge cover regeneration technology is characterized in that this technical process is made up of the following step:
1) will wait that the waste and old working roll of inlaying cover carries out soft annealing, annealing schedule depends on the working roll material,
2) the roll shaft position of intending inlaying cover is machined to predetermined diameter and processing fineness, and is convex, both sides and middle diameter difference are Δ＞0, preventing producing axial motion in edge cover back,
3) by predetermined inside and outside footpath and length processing roller shell, the convex that its inner surface is spill and manufactured roll shaft corresponding site is complementary, and reaches identical fineness,
4) selecting the less magnitude of interference for use is 0.178～0.275mm, and this general attire magnitude of interference is little by 45%,
5) roller shell is heated, select the higher heat medium of thermal capacity for use, medium temperature is 300～350 ℃, notes measuring the axle sleeve swell increment in the heating process,
6) after axle sleeve adds thermal expansion amount and reaches required value, promptly with forcing press axle sleeve is pressed on the roll shaft, carries out the gentle cold treatment of lonneal afterwards immediately, temperature is 200～250 ℃,
7) the working roll size of making by drawing up is changed a social system the working roll that edge packages, and promptly carries out machining, modifier treatment, and body surface quenches, tempering, finally makes new working roll.
2, the cold roll edge according to claim 1 overlaps regeneration technology, it is characterized in that when the working roll material is 86CrMoV7 described working roll soft annealing system is: 600～650 ℃ of annealing temperatures, firing rate≤30 ℃/h, be incubated 12 hours, in stove, be cooled to below 100 ℃ and come out of the stove.
3, according to the cold roll edge cover regeneration technology of claim 1, it is characterized in that when the waste and old working roll of φ 600 * 1700mm tandem mill is changed system into φ 540 * 1700mm single chassis planisher working roll,
1) the φ 406.4mm roll neck place of the waste and old roller of φ 600 * 1700mm is processed into
Mm, wide 160mm also is the edge cover section of convex, both sides and middle diameter difference Δ=0.03mm, processing fineness is
2) making external diameter is φ 440mm, and internal diameter is
The roller shell of long 170mm, inner surface is spill, and both sides and mid diameter difference are 0.03mm, and inner surface fineness is
4, according to the cold roll edge cover regeneration technology of claim 1, it is characterized in that described heat medium is a machinery oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96115540A CN1074323C (en) | 1996-08-13 | 1996-08-13 | Sleeving regeneration tech. for cold-rolling working roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96115540A CN1074323C (en) | 1996-08-13 | 1996-08-13 | Sleeving regeneration tech. for cold-rolling working roller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1173403A CN1173403A (en) | 1998-02-18 |
| CN1074323C true CN1074323C (en) | 2001-11-07 |
Family
ID=5122781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96115540A Expired - Fee Related CN1074323C (en) | 1996-08-13 | 1996-08-13 | Sleeving regeneration tech. for cold-rolling working roller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1074323C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103056391A (en) * | 2011-10-19 | 2013-04-24 | 上海宝钢工业检测公司 | Remanufacturing method of scrap finish rolling high speed steel working roll |
| CN102672437B (en) * | 2012-06-04 | 2014-07-30 | 无锡市三方轧辊有限公司 | Processing technology for recycling hot-rolled aluminum plate mill roll |
| CN105127205B (en) * | 2015-08-31 | 2017-08-29 | 娄底市巨能高新耐磨材料有限公司 | Large-scale bushing roll for producing strip and preparation method thereof |
| CN106425275B (en) * | 2016-11-30 | 2018-10-30 | 马鞍山市恒强合金科技有限公司 | A kind of restorative procedure of cold-rolling support roll |
| CN108127330A (en) * | 2017-12-21 | 2018-06-08 | 宁夏西北骏马电机制造股份有限公司 | The outer insetting case technology of cylinder |
| CN112692510B (en) * | 2020-12-17 | 2022-06-21 | 天津重型装备工程研究有限公司 | Repairing method for local peeling of supporting roller |
| CN112872041A (en) * | 2020-12-24 | 2021-06-01 | 东台市宏凯不锈钢有限公司 | Manganese alloy roller and manufacturing method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1095109A (en) * | 1993-05-08 | 1994-11-16 | 鞍山钢铁公司 | A kind of reforming technology of waste or old roll |
| CN1121446A (en) * | 1995-05-12 | 1996-05-01 | 本溪钢铁公司连轧厂 | Roller renovation technology capable of improving welding layer property |
-
1996
- 1996-08-13 CN CN96115540A patent/CN1074323C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1095109A (en) * | 1993-05-08 | 1994-11-16 | 鞍山钢铁公司 | A kind of reforming technology of waste or old roll |
| CN1121446A (en) * | 1995-05-12 | 1996-05-01 | 本溪钢铁公司连轧厂 | Roller renovation technology capable of improving welding layer property |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1173403A (en) | 1998-02-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent for invention or patent application | ||
| CB02 | Change of applicant information |
Applicant after: Cold Rolling metallurgical Equipment Co., Anshan Iron & Steel Corp. Applicant before: Anshan Steel Company Limited |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: ANSHAN IRON +. STEEL GROUP CORP. TO: ANSTEEL AFFILIATED BUSINESS COLD-ROLLED METALLURGICAL EQUIPMENT COMPANY |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |