CN103831580A - Method for manufacturing hard-face roller of rolling mill - Google Patents
Method for manufacturing hard-face roller of rolling mill Download PDFInfo
- Publication number
- CN103831580A CN103831580A CN201210474935.4A CN201210474935A CN103831580A CN 103831580 A CN103831580 A CN 103831580A CN 201210474935 A CN201210474935 A CN 201210474935A CN 103831580 A CN103831580 A CN 103831580A
- Authority
- CN
- China
- Prior art keywords
- roll
- roller body
- welding
- roller
- quenching
- 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.)
- Pending
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
Abstract
The invention discloses a method for manufacturing a hard-face roller of a rolling mill. A number 45 or number 50 steel plate is rolled into a circle to form the roller body of the hard-face roller, the splicing joint of the roller body is made into a Y-type groove to be welded, the welding joint is wrapped in asbestos after the welding, heat preservation and slow cooling are performed, the roller body is rolled again to form a circle, the circular degree is required to be smaller than or equal to 2 mm, before the quenching is performed, a plurality of circular supporting rib plates are arranged on an inner ring of the roller body at intervals, auxiliary tool shaft heads are installed at the two ends of the roller body, and the outer circle of the roller body is machined to have the size before the quenching; the surface of the roller body is quenched in a vertical medium-frequency quenching mode, the roller body is moved into an electric furnace or a gas furnace to be tempered after being quenched; installed tools are dismantled, an inner hole of the roller body is machined to have the size of the hard-face roller, and shaft head wheel disks are installed at the two ends of the roller body; the surface of the roller body is ground to have the size before spraying, and an abrasion-resistant anti-corrosion coating is manufactured on the surface of the roller body, and the surface of the roller body is ground to have the roughness meeting the technological requirement. The method overcomes the defect of strip-shaped color difference of the roller body, the deformation control range of the roller body is controlled, ideal hardness and ideal hardness distribution are acquired, abrasion resistance and roughness are improved, and the service life of the roller is prolonged.
Description
Technical field
The present invention relates to a kind of manufacture method of milling train stiff dough roller.
Background technology
The stiff dough roller of rolling mill production line, as jockey pulley, top roller, slewing rollers, Burr removing roller etc. all have following feature: hollow, roller wall is thin, diameter at 600-2000mm, roll surface by " hard layer+spraying or chromium plating " technology manufacture.The characteristic feature of this stiff dough roller manufacture method is that after the body of roll adopts the welding of steel plate reel, body surface quenching obtains the hard substrate of certain depth, then adopts spraying or electroplating technology on hard substrate, to make one deck antiseptic wearable coat.
The wherein making of body of roll hard layer, according to the difference of technology and equipment ability, has multiple manufacture method.The first adopts the method for forging to obtain the body of roll, then it is carried out to surface hardening acquisition hard substrate, has but forge the body of roll deficiency that material and processing cost are very high; The second adopts the built-up welding body of roll, i.e. built-up welding one deck hard layer on soft roller stock, the method is specially adapted to the making of the super-large diameter stiff dough body of roll (diameter is more than 1500), still can not meet on the basis that this major diameter roller manufacturing technology requires and put forward at present quenching technology, equipment, the method comparison the first possesses some superiority at cost with on the production cycle, but higher to production technology and equipment requirement, still there is the deficiency that cost is high.The third carries out surface hardening after adopting steel plate reel to be welded into the body of roll again, thereby obtain the base layer that hardens of certain depth, the stiff dough roller cost of this kind of method making is far below first two body of roll preparation method, but also there are at present more technological difficulties in the method, as final products commissure there is aberration, quench after thin roller wall produce quenching distortion and affect the problem such as distribution of hardness.The method is mainly owing to needing to be welded to connect the formation body of roll after sheet material reel, if it is improper that welding procedure or welding material are selected, after quenching there is obvious difference in microstructure and hardness and other positions of the body of roll of position while welding, in macroscopic view, show linear chromatism, after making spraying or chromium plating hard layer, commissure still can show ribbon aberration, and this likely can have influence on strip quality in product use procedure.
In addition, because stiff dough roller is hollow thin-wall roller, surface hardening will inevitably cause roll surface distortion because tissue changes, thereby has influence on the hardness distribution of follow-up machining and whole roll surface.Improper hardness level and the distribution that also can have influence on whole roll surface of quenching technology for surfaces, even causes the appearance of quenched stripes.Thereby affect the application of stiff dough roller in milling train, reduced the service life of stiff dough roller, the rolling quality of impact with steel.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of manufacture method of milling train stiff dough roller, utilize this method to overcome the linear chromatism defect that body of roll weld seam and base material organize hardness inequality to cause, and adopt rational Deformation control means and quenching technical by body of roll quench deformation control within claimed range, desirable hardness level and distribution are obtained, the making of spray-on coating has ensured wearability and the roughness that roller uses, and has extended the service life of roller.
For solving the problems of the technologies described above, the manufacture method of milling train stiff dough roller of the present invention comprises the steps:
Step 1, the stiff dough roller body of roll roll material selection 45# steel or 50# steel board, and get the raw materials ready according to the reserved certain allowance of stiff dough roller size;
Step 3, by welding after the body of roll on three rolls plate bending machine, roll again full circle, require circularity≤2mm, to ensure follow-up machining allowance;
Step 4, the body of roll is carried out to normalizing, modified heat treatment, by normalizing refinement body of roll seam organization, after modifier treatment, hardness of roll body requires in HB220～280;
Step 5, the front body of roll processing of quenching, arrange some cast bearing ribs at body of roll inner ring interval, and auxiliary mould spindle nose is installed at body of roll two ends, size before body of roll cylindrical is machined into and quenches;
Step 6, body surface quench and temper, adopt vertical intermediate frequency quenching mode, roller speed setting is 80r/min, hardening heat is set as 820～950 DEG C, and quenching induction coil translational speed is 60～105mm/min, sprays water cooling when quenching induction coil moves, cooling water pressure 0.2～0.45bar, after body surface quenches, move into temper in electric furnace or gas furnace, temperature is 200～280 DEG C, temperature retention time 3～6 hours;
Step 7, the dismounting some cast bearing ribs of body of roll inner ring and two ends frock spindle nose, be machined to stiff dough roller size to body of roll endoporus, and spindle nose disc is installed at body of roll two ends;
Step 8, grinding body surface, roll surface is ground to the front size of spraying, requires roll surface to print defect without grinding helical pitch;
After step 9, body of roll grinding, prepare wear-and corrosion-resistant coating on its surface, and coating is ground to technological requirement roughness.
Further, in the welding material of this method step 2, add appropriate Cr, Mo element, Cr content≤2 (W) %, Mo content≤0.5 (W) %.
Further, the wear-and corrosion-resistant coating of this method step 9 adopts HVAF technique to be prepared, HVAF material adopts WC-12Co metal ceramic powder, powder granularity 25～65 μ m, spraying parameter is 880～900 liters/min of oxygen gas flow rates, 0.23～0.3 liter/min of kerosene flow velocity, spray distance 300～350mm, coating layer thickness is 0.08～0.18mm.This wear-and corrosion-resistant coating also can adopt durionise method to be prepared, and hard chromium layers thickness is 0.05～0.1mm.
Because the manufacture method of milling train stiff dough roller of the present invention has adopted technique scheme, be that the stiff dough roller body of roll adopts 45# steel or 50# steel board roll bending circle circle, body of roll splicing seams is made into Y type groove welding, postwelding adopts asbestos parcel weld seam and is incubated slow cooling, the body of roll rolls full circle again, require circularity≤2mm, before quenching, body of roll inner ring interval arranges some cast bearing ribs, auxiliary mould spindle nose is installed at two ends, size before body of roll cylindrical is machined into and quenches; Adopt vertical intermediate frequency quenching mode to body of roll surface hardening, after quenching, move into temper in electric furnace or gas furnace; Remove the frock of installing, body of roll endoporus is machined to stiff dough roller size, spindle nose disc is installed at two ends; Grinding body surface is to the front size of spraying, and body surface is prepared wear-and corrosion-resistant coating and is ground to technological requirement roughness.This method has overcome the linear chromatism defect that body of roll weld seam and base material organize hardness inequality to cause, and adopt rational Deformation control means and quenching technical by body of roll quench deformation control within claimed range, desirable hardness level and distribution are obtained, the making of spray-on coating has ensured wearability and the roughness that roller uses, and has extended the service life of roller.
Brief description of the drawings
Below in conjunction with drawings and embodiments, the present invention is described in further detail:
Fig. 1 is the schematic diagram of body of roll mounting tool in the manufacture method of milling train stiff dough roller of the present invention.
Detailed description of the invention
The manufacture method of milling train stiff dough roller of the present invention comprises the steps:
Step 1, consider the operation technique requirement of stiff dough roller, body of roll hard substrate must possess certain hardening depth and case hardness, therefore the stiff dough roller body of roll rolls material selection 45# steel or 50# steel board, and gets the raw materials ready according to the reserved certain allowance of product size;
Step 3, by welding after the body of roll on three rolls plate bending machine, roll again full circle, require circularity≤2mm, to ensure follow-up machining allowance;
Step 4, the body of roll is carried out to normalizing, modified heat treatment, by normalizing refinement body of roll seam organization, after modifier treatment, hardness of roll body requires in HB220～280; Thereby hardness is even after further ensureing body surface quenching, avoid the rear welded seam area of body surface spraying to occur the defect of linear chromatism; This normalizing, modified heat treatment can adopt conventional technological parameter to carry out;
Step 5, as shown in Figure 1, the body of roll quench before processing; Because the body of roll is thin shelled tubular structure, in surface hardening process because tissue inter-variable can produce quenching distortion, therefore need to take corresponding Deformation control measure, at the body of roll 1 inner ring interval, some cast bearing ribs 2 are set, to reduce quenching distortion amount, auxiliary mould spindle nose 3 is installed at the body of roll 1 two ends, so that follow-up body surface is implemented quenching operation, frock spindle nose installs rear body of roll cylindrical and is machined into the front size of quenching; Depending on barrel length, cast bearing rib can be 2-4.
Step 6, body surface quench and temper, adopt vertical intermediate frequency quenching mode, roller speed setting is 80r/min, hardening heat case hardness is as required set as 820～950 DEG C, quenching induction coil translational speed is 60～105mm/min, when moving, quenching induction coil sprays water cooling, cooling water pressure 0.2～0.45bar, after quenching, body surface moves into temper in electric furnace or gas furnace, it is 200～280 DEG C that final hardness situation is as required selected temperature, temperature retention time 3～6 hours; Temper ensures that body of roll quenching hardness requires and the uniformity of hardness;
Step 7, the dismounting some cast bearing ribs of body of roll inner ring and two ends frock spindle nose, be machined to stiff dough roller size to body of roll endoporus, and spindle nose disc is installed at body of roll two ends;
Step 8, grinding body surface, roll surface is ground to the front size of spraying, requires roll surface to print defect without grinding helical pitch;
After step 9, body of roll grinding, prepare wear-and corrosion-resistant coating on its surface, and coating is ground to technological requirement roughness.
Further, in the welding material of this method step 2, add appropriate Cr, Mo element, Cr content≤2 (W) %, Mo content≤0.5 (W) %.
Further, the wear-and corrosion-resistant coating of this method step 9 adopts HVAF technique to be prepared, HVAF material adopts WC-12Co metal ceramic powder, powder granularity 25～65 μ m, spraying parameter is 880～900 liters/min of oxygen gas flow rates, 0.23～0.3 liter/min of kerosene flow velocity, spray distance 300～350mm, coating layer thickness is 0.08～0.18mm; This wear-and corrosion-resistant coating also can adopt durionise method to be prepared, and hard chromium layers thickness is 0.05～0.1mm.
This method adopts the carbon steel hot-rolled sheet coil body of roll processed, adopt suitable welding method and material, and postwelding adopts suitable heat treatment mode, after quenching, body of roll outer surface obtains one deck base layer that hardens, and tempered processing ensures the uniformity of quenching hardness and hardness, simultaneously by adopting rational measure and the table technique of quenching, control the deflection of the thin-walled body of roll, thereby ensure follow-up allowance, thereby then adopt spraying or electroplating technology on body of roll quench-hardened case, to make one deck wear-and corrosion-resistant coating and ensured the quality of product.By the application of this method, workmanship and the service life of stiff dough roller are significantly improved, and are conducive to improve the quality of rolled plate.
Claims (4)
1. a manufacture method for milling train stiff dough roller, is characterized in that this method comprises the steps:
Step 1, the stiff dough roller body of roll roll material selection 45# steel or 50# steel board, and get the raw materials ready according to the reserved certain allowance of stiff dough roller size;
Step 2, by sheet material roll bending circle circle, body of roll splicing seams is made into Y type groove, 30～60 ° of bevel for welding angles inside the body of roll, outside root face 8～10mm, inside the body of roll, bevel for welding adopts 500MPa level welding rod or welding wire to fill, to ensure intensity and the toughness of the body of roll, after completing, processes body of roll weld joint on inner side the U-shaped or double V-groove of a small size in outside, ensure weld joint on inner side back chipping, and adopt tungsten argon arc soldering method or gas metal-arc welding method to fill welding material, the welding material phosphorus content of filling is at 0.45～0.6 (W) %, 200～250 DEG C of welding region local preheatings, postwelding adopts asbestos parcel weld seam and is incubated slow cooling,
Step 3, by welding after the body of roll on three rolls plate bending machine, roll again full circle, require circularity≤2mm, to ensure follow-up machining allowance;
Step 4, the body of roll is carried out to normalizing, modified heat treatment, by normalizing refinement body of roll seam organization, after modifier treatment, hardness of roll body requires in HB220～280;
Step 5, the front body of roll processing of quenching, arrange some cast bearing ribs at body of roll inner ring interval, and auxiliary mould spindle nose is installed at body of roll two ends, size before body of roll cylindrical is machined into and quenches;
Step 6, body surface quench and temper, adopt vertical intermediate frequency quenching mode, roller speed setting is 80r/min, hardening heat is set as 820～950 DEG C, and quenching induction coil translational speed is 60～105mm/min, sprays water cooling when quenching induction coil moves, cooling water pressure 0.2～0.45bar, after body surface quenches, move into temper in electric furnace or gas furnace, temperature is 200～280 DEG C, temperature retention time 3～6 hours;
Step 7, the dismounting some cast bearing ribs of body of roll inner ring and two ends frock spindle nose, be machined to stiff dough roller size to body of roll endoporus, and spindle nose disc is installed at body of roll two ends;
Step 8, grinding body surface, roll surface is ground to the front size of spraying, requires roll surface to print defect without grinding helical pitch;
After step 9, body of roll grinding, prepare wear-and corrosion-resistant coating on its surface, and coating is ground to technological requirement roughness.
2. the manufacture method of milling train stiff dough roller according to claim 1, is characterized in that: in the welding material of this method step 2, add appropriate Cr, Mo element, Cr content≤2 (W) %, Mo content≤0.5 (W) %.
3. the manufacture method of milling train stiff dough roller according to claim 1 and 2, it is characterized in that: the wear-and corrosion-resistant coating of this method step 9 adopts HVAF technique to be prepared, HVAF material adopts WC-12Co metal ceramic powder, powder granularity 25～65 μ m, spraying parameter is 880～900 liters/min of oxygen gas flow rates, 0.23～0.3 liter/min of kerosene flow velocity, spray distance 300～350mm, coating layer thickness is 0.08～0.18mm.
4. the manufacture method of milling train stiff dough roller according to claim 1 and 2, is characterized in that: the wear-and corrosion-resistant coating of this method step 9 adopts durionise method to be prepared, and hard chromium layers thickness is 0.05～0.1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210474935.4A CN103831580A (en) | 2012-11-21 | 2012-11-21 | Method for manufacturing hard-face roller of rolling mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210474935.4A CN103831580A (en) | 2012-11-21 | 2012-11-21 | Method for manufacturing hard-face roller of rolling mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103831580A true CN103831580A (en) | 2014-06-04 |
Family
ID=50795646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210474935.4A Pending CN103831580A (en) | 2012-11-21 | 2012-11-21 | Method for manufacturing hard-face roller of rolling mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103831580A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104266490A (en) * | 2014-10-22 | 2015-01-07 | 常州泉汇机械制造有限公司 | Furnace roller |
| CN104384861A (en) * | 2014-11-12 | 2015-03-04 | 中国矿业大学 | Method for manufacturing abrasion-proof conveying roll with high-temperature erosion resistance |
| CN104526264A (en) * | 2015-02-02 | 2015-04-22 | 天津鸿翔工程机械有限公司 | Novel mechanical locking drill rod three-part guide plate and production method thereof |
| CN105525085A (en) * | 2014-09-29 | 2016-04-27 | 上海宝钢工业技术服务有限公司 | Margin compensation method for surface quenching of hollow thin-wall roller |
| CN107082248A (en) * | 2017-05-19 | 2017-08-22 | 淮北高罗输送装备有限公司 | A kind of anti-corrosion hard alloy strengthens waterproof carrier roller |
| CN107243717A (en) * | 2016-11-14 | 2017-10-13 | 常州宝菱重工机械有限公司 | The preparation method of welded type chrome-plated roller |
| CN107746920A (en) * | 2017-11-28 | 2018-03-02 | 湖北工程职业学院 | A kind of heat treatment quenching process of middle carbon clean steel precision component |
| CN107988473A (en) * | 2017-11-29 | 2018-05-04 | 西安航天动力机械有限公司 | A kind of preparation method of deposited metal blank |
| CN111378918A (en) * | 2020-04-01 | 2020-07-07 | 上海英佛曼纳米科技股份有限公司 | Super wear-resistant nano coating of bristle pressing licker-in |
| CN111618539A (en) * | 2020-06-12 | 2020-09-04 | 烟台翊德船舶维修有限公司 | Production process of wear-resistant layer for flow passage component of cutter suction dredger |
| CN112828055A (en) * | 2020-12-31 | 2021-05-25 | 浦项(张家港)不锈钢股份有限公司 | Manufacturing process of steckel mill steering 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 (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101157174A (en) * | 2007-11-07 | 2008-04-09 | 刘青锋 | Production technology of ring round quench roller |
| CN101362152A (en) * | 2008-09-12 | 2009-02-11 | 上海君山表面技术工程股份有限公司 | Intermediate-frequency quenching hard-surface strain roller and manufacture method thereof |
| CN102284775A (en) * | 2010-06-17 | 2011-12-21 | 上海宝钢设备检修有限公司 | Method for welding roll gaps of large-diameter technical roller coiled by plank stuffs |
-
2012
- 2012-11-21 CN CN201210474935.4A patent/CN103831580A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101157174A (en) * | 2007-11-07 | 2008-04-09 | 刘青锋 | Production technology of ring round quench roller |
| CN101362152A (en) * | 2008-09-12 | 2009-02-11 | 上海君山表面技术工程股份有限公司 | Intermediate-frequency quenching hard-surface strain roller and manufacture method thereof |
| CN102284775A (en) * | 2010-06-17 | 2011-12-21 | 上海宝钢设备检修有限公司 | Method for welding roll gaps of large-diameter technical roller coiled by plank stuffs |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105525085B (en) * | 2014-09-29 | 2019-01-08 | 上海宝钢工业技术服务有限公司 | Hollow thin-wall roller surface quenches surplus compensation method |
| CN105525085A (en) * | 2014-09-29 | 2016-04-27 | 上海宝钢工业技术服务有限公司 | Margin compensation method for surface quenching of hollow thin-wall roller |
| CN104266490A (en) * | 2014-10-22 | 2015-01-07 | 常州泉汇机械制造有限公司 | Furnace roller |
| CN104384861A (en) * | 2014-11-12 | 2015-03-04 | 中国矿业大学 | Method for manufacturing abrasion-proof conveying roll with high-temperature erosion resistance |
| CN104526264A (en) * | 2015-02-02 | 2015-04-22 | 天津鸿翔工程机械有限公司 | Novel mechanical locking drill rod three-part guide plate and production method thereof |
| CN107243717A (en) * | 2016-11-14 | 2017-10-13 | 常州宝菱重工机械有限公司 | The preparation method of welded type chrome-plated roller |
| CN107082248A (en) * | 2017-05-19 | 2017-08-22 | 淮北高罗输送装备有限公司 | A kind of anti-corrosion hard alloy strengthens waterproof carrier roller |
| CN107746920A (en) * | 2017-11-28 | 2018-03-02 | 湖北工程职业学院 | A kind of heat treatment quenching process of middle carbon clean steel precision component |
| CN107988473A (en) * | 2017-11-29 | 2018-05-04 | 西安航天动力机械有限公司 | A kind of preparation method of deposited metal blank |
| CN111378918A (en) * | 2020-04-01 | 2020-07-07 | 上海英佛曼纳米科技股份有限公司 | Super wear-resistant nano coating of bristle pressing licker-in |
| CN111618539A (en) * | 2020-06-12 | 2020-09-04 | 烟台翊德船舶维修有限公司 | Production process of wear-resistant layer for flow passage component of cutter suction dredger |
| 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 |
| CN112828055A (en) * | 2020-12-31 | 2021-05-25 | 浦项(张家港)不锈钢股份有限公司 | Manufacturing process of steckel mill steering roller |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103831580A (en) | Method for manufacturing hard-face roller of rolling mill | |
| CN102717233B (en) | Method for manufacturing 304 precision stainless steel band of precision needle head | |
| CN102294456B (en) | Manufacturing method for oblique rolling of bimetallic compound seamless steel pipe by centrifugal blank | |
| CN100493820C (en) | Manufacturing method of surface-quenching chromium-plating winded-welding roller | |
| RU2008148951A (en) | THERMAL SPRAYING WORKING ROLLERS | |
| CN104245170B (en) | The manufacturing equipment of drilling/rolling top | |
| CN101352796A (en) | Novel technique for producing mandrel bar | |
| CN110328233A (en) | Metal dome ultra-thin accurate strip production technology | |
| CN105779861B (en) | A kind of wear-resisting high vanadium nitrogen high-speed steel shaped roll and its manufacture method | |
| CN104294268B (en) | A kind of wear-resisting deflector roll preparation method | |
| CN102091719A (en) | Limiting mandrel for mandrel pipe mill and manufacturing method thereof | |
| CN113305505A (en) | Method for manufacturing cold-rolled hard-surface process roller | |
| JP2009507654A (en) | Manufacture of hardened roller and plate | |
| CN101362152B (en) | Intermediate-frequency quenching hard-surface strain roller manufacture method | |
| KR100338572B1 (en) | Compound roll for thin cold rolled steel strip and method of manufacturing same | |
| CN109355561A (en) | Aluminium foil mill working roll and its manufacturing method | |
| CN102580619B (en) | Hinge sleeve for cubic presses and manufacturing method thereof | |
| CN103882424A (en) | Method for preparing high-speed wire material rolling mill guide roller with laser cladding coating | |
| CN110976522A (en) | Composite roll collar of kocks rolling mill and manufacturing method | |
| CN109570238B (en) | Roller surface roughness strengthening and optimal control method | |
| CN101954422B (en) | Spinning deviation-correcting method for punching-pulling steel bottle tube wall thickness | |
| CN109536792A (en) | A kind of production technology of mobile phone card slot and push-button material 6061 aluminium alloy of high-performance | |
| CN102000715A (en) | Molding ring for production of large-caliber thick-wall seamless steel pipe and surfacing compound manufacturing method thereof | |
| CN107225370B (en) | A kind of preparation process embossing roller | |
| CN103157694A (en) | Manufacturing method of steel tube provided with rack-shaped inner wall |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140604 |
|
| WD01 | Invention patent application deemed withdrawn after publication |