CN111250928A - Method for remanufacturing support roller - Google Patents
Method for remanufacturing support roller Download PDFInfo
- Publication number
- CN111250928A CN111250928A CN201811463683.9A CN201811463683A CN111250928A CN 111250928 A CN111250928 A CN 111250928A CN 201811463683 A CN201811463683 A CN 201811463683A CN 111250928 A CN111250928 A CN 111250928A
- Authority
- CN
- China
- Prior art keywords
- roller
- scrapped
- adjusting block
- remanufacturing
- cutting
- 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.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B29/00—Counter-pressure devices acting on rolls to inhibit deflection of same under load, e.g. backing rolls ; Roll bending devices, e.g. hydraulic actuators acting on roll shaft ends
Abstract
The invention discloses a method for remanufacturing a support roller, which comprises the steps of providing a scrapped roller, using the roller which is normally scrapped without large reducing amount as a roller material, carrying out ultrasonic penetration on the roller, screening out the roller without cracks and defects in the roller, remanufacturing the scrapped roller by differential heat treatment, cutting and other processes, and recycling the scrapped roller, wherein the method has the advantages that: the scrapped roller is provided, the roller which is normally scrapped without large reducing amount is used as a roller material, the roller is subjected to ultrasonic penetration, the roller without cracks and defects in the roller is screened out, the scheme of large size reduction is realized, resources are saved, and the scrapped roller which does not meet the conditions can also be used for protecting the roller in work.
Description
Technical Field
The invention relates to the field of forged steel processing, in particular to a method for remanufacturing a support roller.
Background
The roller is an important tool for rolling in the process of rolling the strip steel, and meanwhile, the consumption of the roller is one of main cost indexes consumed by a hot rolling mill and accounts for 3-5% of the total cost of the hot rolling mill. Nowadays, the steel industry is not prosperous, the profit space of enterprises is narrow, and the reduction of the production cost of steel products becomes an important work of the steel enterprises. The roller is an important large tool in steel rolling production, the consumption is large, and the investment is large, so that the consumption of the roller occupying a large proportion in the production cost is required to be as low as possible, the production cost is reduced, and the economic benefit is improved.
Disclosure of Invention
The invention discloses a method for remanufacturing a support roller, which comprises the steps of providing a scrapped roller, using the roller which is normally scrapped without large reducing amount as a roller material, carrying out ultrasonic penetration on the roller, screening out the roller without cracks and defects in the roller, and remanufacturing and recycling the scrapped roller through differential heat treatment, cutting and other processes.
The specific technical scheme is as follows:
a method for remanufacturing a support roller comprises the steps of providing a scrapped roller, using the roller which is normally scrapped without large reducing amount as a roller material, carrying out ultrasonic penetration on the roller, and screening out the roller without cracks and defects in the roller;
heating the roller at differential temperature by using a differential temperature furnace, firstly tempering the roller to meet the requirement of roller diameter hardness, then putting the roller into an air furnace for integral preheating at 500-600 ℃, then carrying out spray quenching and tempering, wherein the quenching temperature is 830-850 ℃, the tempering temperature is 180-260 ℃, and the tempered roller surface is tempered martensite;
adjusting the relative position between the cutting tool and the end surface of the roll to be cut before starting the cutting process does not exceed the tolerance; the size sensor measures the thermal expansion amount of the roller shaft after cutting as a preset parameter, and the roller shaft can conduct heat through the bearing and is transmitted to the bearing end cover;
the size sensor may be provided on an outer end face of the cutting tool;
cutting the surface of the roller by a cutting tool, cooling the roller shaft by using a coolant after cutting to a preset size, and stopping when the thermal expansion amount of the roller shaft is cooled to a preset parameter;
the invention further discloses a remanufacturing method of the support roller of the down-flow machine frame, which comprises the steps of providing a scrapped roller, heating the roller at differential temperature by utilizing a differential temperature furnace, firstly tempering the roller to meet the hardness requirement of the roller diameter, then putting the roller into a gas furnace for integral preheating at 500-600 ℃, then carrying out spray quenching and tempering, wherein the spray quenching temperature is 830-850 ℃, the tempering temperature is 180-260 ℃, and the surface of the tempered roller is tempered martensite;
after carrying out differential temperature heat treatment on the shoulder ring, placing the shoulder ring on a processed roller shaft;
the support roll positioning device comprises a rack, the positioning roll device is arranged on the rack, a connecting rod is arranged between roll shafts of the rolls and connected to the rack, a limiting mechanism is arranged on the connecting rod and comprises an adjusting block and a limiting rod, the adjusting block is connected with the connecting rod in a sliding mode, the limiting rod is fixed on the adjusting block, and a locking mechanism for fixing the position is arranged on the adjusting block;
furthermore, the locking mechanism comprises a locking hole arranged on the adjusting block, a screw and a rotating disc, the screw is matched with the locking hole, and the rotating disc is fixed with the screw;
furthermore, the connecting rod quantity is 2, the gag lever post is 2, and connecting rod and gag lever post are the rectangle structure.
The invention has the advantages that: the scrapped roller is provided, the roller which is normally scrapped without large reducing amount is used as a roller material, the roller is subjected to ultrasonic penetration, the roller without cracks and defects in the roller is screened out, the scheme of large size reduction is realized, resources are saved, and the scrapped roller which does not meet the conditions can also be used for protecting the roller in work.
Drawings
FIG. 1 is a table diagram of a front-back change part comparison table of the backup roll changing method of the present invention;
FIG. 2 is a front-to-back comparison of a backup roll remanufacturing structure of the present invention, wherein the solid line is before remanufacturing and the dashed line is after remanufacturing;
FIG. 3 is a cross-sectional view of a pre-alteration and post-alteration site of the method for remanufacturing a support roll for a downstream rack of the present invention;
FIG. 4 is a front-to-back comparison of a downstream backup roll retrofit configuration of the present invention;
FIG. 5 is a schematic view of the construction of the registration roller assembly of the present invention;
fig. 6 is a partial structural view of the registration roller device of the present invention.
Detailed Description
The invention is described in detail with reference to the accompanying drawings, and as shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6, a method for remanufacturing a support roll is characterized in that a scrapped roll is provided, a normally scrapped roll without large reducing amount is used as a roll material, the roll is subjected to ultrasonic penetration, and a roll without cracks and defects in the roll is screened out;
heating the roller at differential temperature by using a differential temperature furnace, firstly tempering the roller to meet the requirement of roller diameter hardness, then putting the roller into an air furnace for integral preheating at 500-600 ℃, then carrying out spray quenching and tempering, wherein the spray quenching temperature is 830-850 ℃, the tempering temperature is 180-260 ℃, and the tempered roller surface is tempered martensite;
adjusting the relative position between the cutting tool and the end surface of the roll to be cut before starting the cutting process does not exceed the tolerance; the size sensor measures the thermal expansion amount of the roller shaft after cutting as a preset parameter, and the roller shaft can conduct heat through the bearing and is transmitted to the bearing end cover;
the size sensor may be provided on an outer end face of the cutting tool;
cutting the surface of the roller by a cutting tool, cooling the roller shaft by using a coolant after cutting to a preset size, and stopping when the thermal expansion amount of the roller shaft is cooled to a preset parameter;
the invention further discloses a remanufacturing method of the support roller of the down-flow machine frame, which comprises the steps of providing a scrapped roller, heating the roller at differential temperature by utilizing a differential temperature furnace, firstly tempering the roller to meet the hardness requirement of the roller diameter, then putting the roller into a gas furnace for integral preheating at 500-600 ℃, then carrying out spray quenching and tempering, wherein the quenching temperature is 830-850 ℃, the tempering temperature is 180-260 ℃, and the surface of the tempered roller is tempered martensite;
after carrying out differential temperature heat treatment on the shoulder ring, placing the shoulder ring on a processed roller shaft;
the invention also discloses a positioning device for the supporting roller of the downstream rack, which comprises a rack 001, wherein the positioning roller device is arranged on the rack 001, a connecting rod 1 is arranged between roller shafts of the rollers, the connecting rod 1 is connected to the rack, a limiting mechanism 2 is arranged on the connecting rod 1, the limiting mechanism 2 comprises an adjusting block 201 and a limiting rod 202, the adjusting block 201 is connected with the connecting rod 1 in a sliding manner, the limiting rod 202 is fixed on the adjusting block 201, and a locking mechanism 3 for fixing the position is arranged on the adjusting block 201;
further, the locking mechanism 3 comprises a locking hole arranged on the adjusting block 201 and a locking member 301, the locking mechanism 3 further comprises a screw 301 and a rotating disc 302, the screw 301 is matched with the locking hole, and the rotating disc 302 is fixed with the screw 301;
furthermore, the number of the connecting rods 1 is 2, the number of the limiting rods 202 is 2, and the connecting rods 1 and the limiting rods 202 are in a rectangular structure.
Claims (5)
1. A method for remanufacturing a support roll is characterized in that: using a scrapped roller as a roller material, carrying out ultrasonic penetration on the roller, and screening out the roller without cracks and defects inside the roller;
heating the roller at differential temperature by using a differential temperature furnace, firstly tempering the roller to meet the requirement of roller diameter hardness, then putting the roller into an air furnace for integral preheating at 500-600 ℃, then carrying out spray quenching and tempering, wherein the quenching temperature is 830-850 ℃, the tempering temperature is 180-260 ℃, and the tempered roller surface is tempered martensite;
before starting cutting machining, adjusting the relative position between the cutting tool and the end face of the roller to be cut to be not more than tolerance; collecting the thermal expansion amount of the cut roller shaft by using a size sensor and measuring the thermal expansion amount as a preset parameter, wherein the roller shaft can conduct heat through a bearing and is transmitted to a bearing end cover;
and cutting the surface of the roller by a cutting tool, cooling the roller shaft by using a coolant after cutting to a preset size, and stopping when the thermal expansion amount of the roller shaft is cooled to a preset parameter.
2. A support roll remanufacturing method according to claim 1, wherein: and (3) carrying out differential temperature heat treatment on the shoulder and shoulder ring, and then placing the shoulder and shoulder ring on the processed roll shaft.
3. A backup roll positioning device comprising the method of claim 1, wherein: the automatic roller positioning device is characterized in that a positioning roller device is arranged on the rack, a connecting rod is installed between roller shafts of the rollers and connected to the rack, a limiting mechanism is arranged on the connecting rod and comprises an adjusting block and a limiting rod, the adjusting block is connected with the connecting rod in a sliding mode, the limiting rod is fixed to the adjusting block, and a locking mechanism used for fixing the position is arranged on the adjusting block.
4. A support roll positioning device as recited in claim 3, wherein: the locking mechanism comprises a locking hole formed in the adjusting block, a screw and a rotating disc, the screw is matched with the locking hole, and the rotating disc is fixed with the screw.
5. A supporting roller positioning device as claimed in claim 3, wherein the number of the connecting rods is 2, the number of the limiting rods is 2, and the connecting rods and the limiting rods are in a rectangular structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811463683.9A CN111250928B (en) | 2018-12-03 | 2018-12-03 | Method for remanufacturing support roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811463683.9A CN111250928B (en) | 2018-12-03 | 2018-12-03 | Method for remanufacturing support roller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111250928A true CN111250928A (en) | 2020-06-09 |
| CN111250928B CN111250928B (en) | 2021-11-09 |
Family
ID=70953758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811463683.9A Active CN111250928B (en) | 2018-12-03 | 2018-12-03 | Method for remanufacturing support roller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111250928B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112692510A (en) * | 2020-12-17 | 2021-04-23 | 天津重型装备工程研究有限公司 | Repairing method for local peeling of supporting roller |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19980087567A (en) * | 1998-06-12 | 1998-12-05 | 박홍제 | Heat treatment method of roller for rotary compressor |
| CN101698902A (en) * | 2009-11-11 | 2010-04-28 | 江苏共昌轧辊有限公司 | Quenching method for integral cast steel supporting roll |
| CN102441760A (en) * | 2011-11-07 | 2012-05-09 | 山西鼎荣冷弯型钢有限公司 | Cold-bending roller welding repair method |
| CN102744554A (en) * | 2012-07-19 | 2012-10-24 | 盐城市成功机械制造有限公司 | Remanufacturing technology of waste rollers in iron and steel industry |
| CN107150205A (en) * | 2017-03-28 | 2017-09-12 | 宝钢轧辊科技有限责任公司 | Method for scrapping large forged back -up roll circular regeneration |
| CN108340123A (en) * | 2017-01-24 | 2018-07-31 | 宝山钢铁股份有限公司 | A kind of strip-mill strip backing roll scrap after method for remanufacturing |
-
2018
- 2018-12-03 CN CN201811463683.9A patent/CN111250928B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19980087567A (en) * | 1998-06-12 | 1998-12-05 | 박홍제 | Heat treatment method of roller for rotary compressor |
| CN101698902A (en) * | 2009-11-11 | 2010-04-28 | 江苏共昌轧辊有限公司 | Quenching method for integral cast steel supporting roll |
| CN102441760A (en) * | 2011-11-07 | 2012-05-09 | 山西鼎荣冷弯型钢有限公司 | Cold-bending roller welding repair method |
| CN102744554A (en) * | 2012-07-19 | 2012-10-24 | 盐城市成功机械制造有限公司 | Remanufacturing technology of waste rollers in iron and steel industry |
| CN108340123A (en) * | 2017-01-24 | 2018-07-31 | 宝山钢铁股份有限公司 | A kind of strip-mill strip backing roll scrap after method for remanufacturing |
| CN107150205A (en) * | 2017-03-28 | 2017-09-12 | 宝钢轧辊科技有限责任公司 | Method for scrapping large forged back -up roll circular regeneration |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112692510A (en) * | 2020-12-17 | 2021-04-23 | 天津重型装备工程研究有限公司 | Repairing method for local peeling of supporting roller |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111250928B (en) | 2021-11-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101358279B (en) | Technique and method for preparing biconical roller of large-sized strip hot-rolling mill transport roller | |
| KR100572346B1 (en) | Method for producing steel rolling bearing rings | |
| CN106425275B (en) | A kind of restorative procedure of cold-rolling support roll | |
| CN104878317A (en) | Hot-rolling production method for low-nickel austenitic stainless steel coils | |
| CN107263036B (en) | A kind of processing method of locating snap ring | |
| CN204052381U (en) | A kind of Continuous mill train runout table pallet device | |
| CN105921514A (en) | Method for producing high-strength Q690D steel plate with thickness of 4 mm on wide and thick plate mill | |
| CN111250928B (en) | Method for remanufacturing support roller | |
| CN101992395A (en) | Machining-shaping process of bearing ring | |
| CN109909314B (en) | Alloy plate processing method | |
| CN110976522A (en) | Composite roll collar of kocks rolling mill and manufacturing method | |
| CN108213843A (en) | A kind of 2219 aluminum alloy C-shaped section rings process for manufacturing forging | |
| US20090139092A1 (en) | Method and manufacturing of ball bearing rings | |
| CN108340123B (en) | Remanufacturing method for scrapped supporting roll of plate and strip mill | |
| CN104325061B (en) | The nickel-base alloy hammering block of a kind of side of forging band steel | |
| CN114406000A (en) | Continuous casting and rolling method for common low-carbon steel medium plate | |
| CN113290045A (en) | Rolling process for improving bending of CrMo round steel | |
| CN205324290U (en) | A phosphorus removal device that after is used for gas cylinder material piece to heat | |
| CN114323732B (en) | Sampling method for roller sample | |
| CN114603079B (en) | Carbide refining method for flat-bottom bearing ring | |
| Topno et al. | Improvement in the surface quality of ball bearing steel rounds at Bar Mill | |
| CN115229452B (en) | Constant velocity universal joint cage machining method | |
| RU2246999C1 (en) | Method for making rolling rolls | |
| CN112404130B (en) | Method for controlling S45C decarburization | |
| CN102732711B (en) | Method for removing intractable mixed crystal in medium-carbon low-alloy structural steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |