CN103567745B - A kind of continuous casting of molten steel withdrawal straightening machine pulling-straightening roller assembling device and assembly method - Google Patents
A kind of continuous casting of molten steel withdrawal straightening machine pulling-straightening roller assembling device and assembly method Download PDFInfo
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- CN103567745B CN103567745B CN201310535038.4A CN201310535038A CN103567745B CN 103567745 B CN103567745 B CN 103567745B CN 201310535038 A CN201310535038 A CN 201310535038A CN 103567745 B CN103567745 B CN 103567745B
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- straightening roller
- straightening
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- 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
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/02—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
- B23P19/027—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same using hydraulic or pneumatic means
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Abstract
The invention provides a kind of continuous casting of molten steel withdrawal straightening machine pulling-straightening roller assembling device and assembly method, device comprises mechanical part and hydraulic control part, mechanical part comprises frame leg, be arranged on the framework platform on frame leg, the central shaft hole that framework platform center has pulling-straightening roller to locate, the doorframe that framework platform erects, the central shaft hole dead in line of doorframe place central plane and framework platform, doorframe top cross-bar installs hydraulic ram cylinders, the piston rod of hydraulic ram cylinders is corresponding with central shaft hole vertically downward, is furnished with pushes against sleeve.A kind of continuous casting of molten steel withdrawal straightening machine pulling-straightening roller assembly method of the present invention is that the first roll shaft of pulling-straightening roller is put into Platform center axis hole, pulling-straightening roller end face is steadily located on framework platform, assembles the bearing assembly on the second roll shaft; Then start overhead traveling crane pulling-straightening roller is sling and swings to, make the first roll shaft of pulling-straightening roller winch to above pulling-straightening roller, complete the installation of the bearing assembly on the first roll shaft; Finally the pulling-straightening roller installing bearing assembly is hung out together.
Description
Technical field
The present invention relates to a kind of continuous casting of molten steel withdrawal straightening machine pulling-straightening roller assembling device and assembly method, belong to the mechanical production devices that molten steel foundry work journey uses, specifically refer to a kind of vertical Ye Kong Installed roller method and device of colding pressing.
Background technology
In continuous casting of molten steel production technology, must be provided with withdrawal straightening machine by strand from segmental arc strand out after flex point is aligned, strand continues along horizontal line ejection.Withdrawal straightening machine plays a part throwing and strong base, send the effect of dummy bar in addition.The working condition of wherein straightening (freedom) roller the most directly affects quality and the efficiency of withdrawal straightening machine throwing.The hot charge practice of current straightening (freedom) roller many uses machine oil heating bearing when running in bearings, the machine oil boiling point of heating serviceability temperature is at 140 ~ 170 DEG C, and the sealing ring material of bearing face is nitrile rubber, operating temperature-40 ~+100 DEG C, exceedes sealing ring heat resisting temperature and damages sealing ring; Seal failure causes bearing lubrication conditions worsen, affects in addition the stuck fault of roller occurs by 150 ~ 250 DEG C of hot environments and iron scale.And hot charge practice had both wasted machine oil, contaminated environment, loaded down with trivial details, the inefficiency of program again.Sealing effectiveness is directly connected to the result of use of lubricant effect and whole withdrawal straightening machine: well, the service life of straightening and free roll can reach half a year more than for sealing and lubricant effect; And sealing and lubrication failure, straightening (freedom) roller had both delayed the production time less than 7 days service life, affected cc billet surface quality again.
Summary of the invention
Object of the present invention is exactly overcome Chuan Tong Installed roller mode high oil temperature to the damage problem of rubber seal, provides a kind of continuous casting of molten steel withdrawal straightening machine pulling-straightening roller assembling device and assembly method, can protect sealing, environment-friendly high-efficiency.
Technical scheme of the present invention: continuous casting of molten steel withdrawal straightening machine pulling-straightening roller assembling device of the present invention comprises mechanical part and hydraulic control part, mechanical part comprises frame leg, be arranged on the framework platform on frame leg, the central shaft hole that framework platform center has pulling-straightening roller to locate, the doorframe that framework platform erects, the central shaft hole dead in line of doorframe place central plane and framework platform, doorframe top cross-bar installs hydraulic ram cylinders, the piston rod of hydraulic ram cylinders is corresponding with central shaft hole vertically downward, is furnished with pushes against sleeve.
There is counter flange at central shaft hole place on described framework platform, and bearing assembly detent is arranged at counter flange top.
Compression backing plate is established at set pushes against sleeve top.
The Hydraulic Station be connected with hydraulic ram cylinders is little truck mobile standard universal type device.
A kind of continuous casting of molten steel withdrawal straightening machine pulling-straightening roller assembly method of the present invention, step is as follows:
1) with overhead traveling crane, the first roll shaft of pulling-straightening roller is put into Platform center axis hole, adjustment pulling-straightening roller position, pulling-straightening roller axis is overlapped substantially with Platform center axis hole axis, and pulling-straightening roller end face is steadily located on framework platform;
2) be assemblied on the second roll shaft by the water-cooled transparent cover installing rubber seal, water-cooled transparent cover water flowing end presses close to axle sleeve step;
3) bearing block that bearing is housed is assemblied on the second roll shaft, is placed in water-cooled transparent cover;
4) pushes against sleeve be enclosed within the second roll shaft, start hydraulic ram cylinders, piston rod stretches out and withstands pushes against sleeve, and pushes against sleeve lower end pushing bearing inner race, is progressively depressed into axle sleeve stepped locations by bearing;
5) transparent cover is put into the second roll shaft, be positioned on bearing and bearing block, water-cooled transparent cover, bearing block, transparent cover connected with bolt and nut, the bearing assembly completed on the second roll shaft is installed;
6) start overhead traveling crane, sling by pulling-straightening roller and swing to, make the first roll shaft of pulling-straightening roller winch to above pulling-straightening roller, be placed on by counter flange on framework platform, counter flange centre bore overlaps with framework platform central shaft hole; The second roll shaft pulling-straightening roller being equipped with bearing again puts into Platform center axis hole, and bearing block lies in a horizontal plane on counter flange, transparent cover is placed in the detent on counter flange top, and pulling-straightening roller end face is steadily located on counter flange; Bearing block lies in a horizontal plane on counter flange;
7) step 2 is repeated) ~ 5) complete the installation of the bearing assembly on the first roll shaft;
8) pulling-straightening roller installing bearing assembly is hung out by specialized wire rope together.
Described bearing assembly there are 6 bolts hole, when water-cooled transparent cover, bearing block, transparent cover are connected and fixed by step 5) bolt and nut, leave two symmetrical bolts hole and do not fill bolt and nut, for installing lifting bolt; When pulling-straightening roller is sling and swings to by step 6), lifting bolt is screwed into two symmetrical bolts hole, the lifting bolt end of thread screws on nut, specialized wire rope is swung to by hanging over two secondary suspension ring pulling-straightening roller to be hung in by lifting bolt overhead traveling crane hook completes, finally lifting bolt is taken out, change assembling bolt nut and complete bearing assembly on the second roll shaft and install.
When water-cooled transparent cover, bearing block, transparent cover are connected and fixed by described step 7) and step 8) bolt and nut, leave two symmetrical bolts hole and do not fill bolt and nut, for installing lifting bolt; When pulling-straightening roller is sling, lifting bolt is screwed into two symmetrical bolts hole, specialized wire rope hangs out by hanging over two secondary suspension ring pulling-straightening roller to be hung in by lifting bolt overhead traveling crane hook completes, and is finally taken out by lifting bolt, changes assembling bolt nut and completes bearing assembly and install.
Pushes against sleeve is enclosed within after on the second roll shaft by described step 4), is placed in pushes against sleeve, restarts hydraulic ram cylinders by compression backing plate, and the piston rod of plunger case stretches out to withstand and compresses backing plate plate, progressively bearing is depressed into axle sleeve step position.
Described axle sleeve and the axle of pulling-straightening roller are interference fits, by axle sleeve gas welding homogeneous heating 150 ~ 200 DEG C, are contained on the axle of pulling-straightening roller, and cooling rear axle housing is held tightly on the axle of pulling-straightening roller.
Beneficial effect of the present invention is: by device of the present invention, mechanization at normal temperatures can complete straightening (freedom) roller assembling process, do not cause any damage to bearing rubber seal, efficiency improves 5 ~ 10 times (depending on roller size), and assembly precision can reach drawing required precision.And eliminate the loaded down with trivial details and difficult link such as oil firing, hot bearing lifting, reach object that is simple to operate, efficient, environmental protection.Device of the present invention makes pulling-straightening roller to be installed assemble centering conveniently, is specially adapted to assembling and the lifting of square billet straightening (freedom) roller.
Have cooling protection effect to sealing ring after water-cooled transparent cover leads to cooling water, compare metal expansion ring seale mode and have advantage, stuck, to destroy bearing block and pulling-straightening roller fault can not occur, and will adopt rubber seal, cold-pressing assembly is Reliable guarantee.
When pulling-straightening roller one end has been assembled, reserve two symmetrical bolts hole, as two installation lifting bolts, then wear ring with steel wire rope and vertically sling, reliably safe.
Accompanying drawing explanation
Fig. 1 is structural representation and one end assembling schematic diagram of apparatus of the present invention.
Fig. 2 is structural representation and the other end assembling schematic diagram of apparatus of the present invention.
Fig. 3 is the assembling close-up schematic view of apparatus of the present invention.
Fig. 4 is apparatus of the present invention and assembling overall schematic.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, function of the present invention is described in further detail:
As Fig. 1,2,3,4: a kind of continuous casting of molten steel withdrawal straightening machine pulling-straightening roller assembling device of the present invention comprises mechanical part and hydraulic control part, its mechanical part comprises frame leg 1, be arranged on the framework platform 2 on frame leg 1, the central shaft hole 2a that framework platform 2 center has pulling-straightening roller to locate, the doorframe 3 that framework platform 2 erects, doorframe 3 place central plane and central shaft hole 2a dead in line, doorframe 3 top cross-bar installs hydraulic ram cylinders 4, the piston rod 4a of hydraulic ram cylinders 4 is corresponding with central shaft hole 2a vertically downward, is furnished with pushes against sleeve 5.
On described framework platform 2, there is counter flange 7 at central shaft hole 2a place, and bearing assembly detent 7a is arranged at counter flange 7 top.
Set pushes against sleeve 5 top is established and is compressed backing plate 6.Compress each several piece that backing plate 6 thickness has 10mm, 15mm, 25mm specification, to meet needed for stroke.
Hydraulic part comprises hydraulic ram cylinders 4, and hydraulic ram cylinders 4 is connected with Hydraulic Station 15 by hydraulic hose, and Hydraulic Station 15 is little truck mobile standard universal type device.
Framework platform 2 is circular ring types, counter flange 7 is circular ring type, is movable detachable flange, is placed on framework platform 2, for adapting to the bearing block of all kinds of specification and having prepared 5 specifications, processing is simple, can process at any time as required, its external diameter 10 ~ 20mm less of doorframe 3 internal diameter, internal diameter 3 ~ 5mm larger than the boss external diameter of transparent cover 13, ensure that pulling-straightening roller and bearing block are put into after on counter flange 7, the axle center of pulling-straightening roller is substantially moderate, only need carry out fine setting with regard in adjusting.Counter flange 7 thickness, according to guaranteeing bearing load and extruding force and the indeformable experience of flange itself is determined, is generally 16 ~ 25mm.
Plunger case 4 extend action is some dynamic formula, so that control decrement.
Described pushes against sleeve 5 selects suitable steel pipe to process, and length can be 150mm, 200mm, 250mm, 300mm, 350mm.The internal diameter 2mm larger than the internal diameter of bearing of pushes against sleeve 5, external diameter 2mm less of the external diameter of bearing inner race, so not only facilitated and packed on straightening roll shaft smoothly but also do not damage bearing block.
Described compression backing plate 6, its thickness and quantity are plunger case stroke difference and determine, and cylindrical, external diameter is just more bigger than the external diameter of pushes against sleeve 5.
Described plunger case 4 stroke is 350mm, maximum thrust 10000N, enough meets the required thrust of assembling.Extend action is some dynamic formula, so that control decrement; A whole set of Hydraulic Station 15 is dolly wheeled apparatus, and the scene of being convenient to is put.
During use, device is vertically placed on job platform.
Continuous casting of molten steel withdrawal straightening machine pulling-straightening roller assembly method of the present invention, step is as follows:
1) with overhead traveling crane, the first roll shaft 8a of pulling-straightening roller 8 is put into Platform center axis hole 2a, adjustment pulling-straightening roller 8 position, pulling-straightening roller 8 axis is overlapped substantially with Platform center axis hole 2a axis, and pulling-straightening roller 8 end face is steadily located on framework platform 2;
2) be assemblied on the second roll shaft 8b by the water-cooled transparent cover 10 installing rubber seal, water-cooled transparent cover 10 water flowing end presses close to axle sleeve 9 step;
3) bearing block 12 that bearing 11 is housed is assemblied on the second roll shaft, is placed in water-cooled transparent cover 10;
4) pushes against sleeve 5 be enclosed within the second roll shaft 8b, start hydraulic ram cylinders 4, piston rod 4a stretches out and withstands pushes against sleeve 5, and pushes against sleeve 5 lower end pushing bearing inner race, is progressively depressed into axle sleeve 9 stepped locations by bearing 11;
5) transparent cover 13 is put into the second roll shaft 8b, be positioned on bearing 11 and bearing block 12, water-cooled transparent cover 10, bearing block 12, transparent cover 13 connected with bolt and nut 14, the bearing assembly completed on the second roll shaft 8b is installed; As Fig. 1.
6) start overhead traveling crane, winch to above pulling-straightening roller 9 by the first roll shaft 8a, be placed on by counter flange 7 on framework platform 2, counter flange 7 centre bore overlaps with framework platform 2 central shaft hole 2a; Again the second roll shaft 8b that bearing is housed is put into Platform center axis hole 2a, bearing block 12 lies in a horizontal plane on counter flange 7, transparent cover 13 is placed in the detent 7a on counter flange 7 top, makes pulling-straightening roller 8 end face steadily be located on counter flange 2; Bearing block 4 lies in a horizontal plane on counter flange 2;
7) step 2 is repeated) ~ 5) complete the installation of the bearing assembly on the first roll shaft 8a; As Fig. 2.
8) pulling-straightening roller installing bearing assembly is hung out by specialized wire rope together.
Described bearing assembly there are 6 bolts hole, when water-cooled transparent cover 10, bearing block 12, transparent cover 13 are connected and fixed by step 5) bolt and nut 14, leave two symmetrical bolts hole and do not fill bolt and nut 14, for lifting; When pulling-straightening roller 8 is sling and swings to by step 6), lifting bolt is screwed into two symmetrical bolts hole, the lifting bolt end of thread screws on nut, specialized wire rope hangs over pulling-straightening roller 8 to be hung in by lifting bolt overhead traveling crane hook completes by two secondary suspension ring and swings to, finally lifting bolt is taken out, change assembling bolt nut 14 and complete bearing assembly on the second roll shaft 8b and install.
In like manner, when water-cooled transparent cover 10, bearing block 12, transparent cover 13 are connected and fixed by step 7) and step 8) bolt and nut 14, leave two symmetrical bolts hole and do not fill bolt and nut 14, for lifting; When pulling-straightening roller 8 is sling, lifting bolt is screwed into two symmetrical bolts hole, specialized wire rope hangs out by hanging over two secondary suspension ring pulling-straightening roller 8 to be hung in by lifting bolt overhead traveling crane hook completes, and is finally taken out by lifting bolt, changes assembling bolt nut 14 and completes bearing assembly and install.
Pushes against sleeve 5 is enclosed within after on the second roll shaft 8b by described step 4), compression backing plate 6 is placed on pushes against sleeve 5, restarts hydraulic ram cylinders 4, and the piston rod 4a of plunger case 4 stretches out to withstand and compresses backing plate plate, progressively bearing 11 is depressed into axle sleeve 9 step position.
Described axle sleeve 9 is interference fits with the axle of pulling-straightening roller 8, by axle sleeve 9 gas welding homogeneous heating 150 ~ 200 DEG C, is contained on the axle of pulling-straightening roller 8, and cooling rear axle housing 9 is held tightly on the axle of pulling-straightening roller.
Described step 2) if water-cooled transparent cover 10 too heavy manually remove motionless, can use band suspension ring bolt and nut be connected on the screw of water-cooled transparent cover 10, lifted with overhead traveling crane.
Claims (5)
1. a continuous casting of molten steel withdrawal straightening machine pulling-straightening roller assembly method, step is as follows:
1) with overhead traveling crane, first roll shaft (8a) of pulling-straightening roller (8) is put into the central shaft hole (2a) of framework platform, adjustment pulling-straightening roller (8) position, pulling-straightening roller (8) axis is overlapped substantially with Platform center axis hole (2a) axis, and pulling-straightening roller (8) end face is steadily located on framework platform (2);
2) be assemblied on the second roll shaft (8b) by the water-cooled transparent cover (10) installing rubber seal, water-cooled transparent cover (10) water flowing end presses close to axle sleeve (9) step;
3) bearing block (12) that bearing (11) are housed is assemblied on the second roll shaft (8b), is placed in water-cooled transparent cover (10);
4) pushes against sleeve (5) is enclosed within the second roll shaft (8b), start hydraulic ram cylinders (4), piston rod (4a) stretches out and withstands pushes against sleeve (5), pushes against sleeve (5) lower end pushing bearing inner race, is progressively depressed into axle sleeve (9) stepped locations by bearing (11);
5) transparent cover (13) is put into the second roll shaft (8b), be positioned on bearing (11) and bearing block (12), water-cooled transparent cover (10), bearing block (12), transparent cover (13) are connected with bolt and nut (14), the bearing assembly completed on the second roll shaft (8b) is installed;
6) overhead traveling crane is started, pulling-straightening roller (8) is sling and swung to, first roll shaft (8a) of pulling-straightening roller is made to winch to pulling-straightening roller (8) top, be placed on by counter flange (7) on framework platform (2), counter flange (7) centre bore overlaps with framework platform (2) central shaft hole (2a); The second roll shaft (8b) again pulling-straightening roller being equipped with bearing puts into central shaft hole (2a), bearing block (12) lies in a horizontal plane on counter flange (7), transparent cover (13) is placed in the detent (7a) on counter flange (7) top, makes pulling-straightening roller (8) end face steadily be located on counter flange (7); Bearing block (12) lies in a horizontal plane on counter flange (7);
7) step 2 is repeated) ~ 5) complete the installation of the bearing assembly on the first roll shaft (8a);
8) with specialized wire rope, the pulling-straightening roller installing bearing assembly is hung out together.
2. continuous casting of molten steel withdrawal straightening machine pulling-straightening roller assembly method according to claim 1, it is characterized in that: bearing assembly has 6 bolts hole, step 5) when water-cooled transparent cover (10), bearing block (12), transparent cover (13) being connected and fixed with bolt and nut (14), leave two symmetrical bolts hole and do not fill bolt and nut (14), for installing lifting bolt; Step 6) when pulling-straightening roller (8) is sling and is swung to, lifting bolt is screwed into two symmetrical bolts hole, lifting bolt thread end screws on nut, specialized wire rope is swung to by hanging over two secondary suspension ring pulling-straightening roller (8) to be hung in by lifting bolt overhead traveling crane hook completes, finally will lift bolt to take out, and change assembling bolt nut (14) and complete bearing assembly on the second roll shaft (8b) and install.
3. continuous casting of molten steel withdrawal straightening machine pulling-straightening roller assembly method according to claim 1 and 2, it is characterized in that: step 7) and step 8) when water-cooled transparent cover (10), bearing block (12), transparent cover (13) being connected and fixed with bolt and nut (14), leave two symmetrical bolts hole and do not fill bolt and nut (14), for installing lifting bolt; When pulling-straightening roller (8) is sling, lifting bolt is screwed into two symmetrical bolts hole, specialized wire rope hangs out by hanging over two secondary suspension ring pulling-straightening roller (8) to be hung in by lifting bolt overhead traveling crane hook completes, finally will lift bolt to take out, and change assembling bolt nut (14) and complete bearing assembly installation.
4. continuous casting of molten steel withdrawal straightening machine pulling-straightening roller assembly method according to claim 1 and 2, it is characterized in that: step 4) pushes against sleeve (5) is enclosed within after on the second roll shaft (8b), to compress backing plate (6) is placed in pushes against sleeve (5), restart hydraulic ram cylinders (4), the piston rod (4a) of plunger case (4) stretches out and withstands compression backing plate, progressively bearing (11) is depressed into axle sleeve (9) step position.
5. continuous casting of molten steel withdrawal straightening machine pulling-straightening roller assembly method according to claim 1 and 2, it is characterized in that: axle sleeve (9) is interference fits with the axle of pulling-straightening roller (8), by axle sleeve (9) gas welding homogeneous heating 150 ~ 200 DEG C, be contained on the axle of pulling-straightening roller (8), cooling rear axle housing (9) is held tightly on the axle of pulling-straightening roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310535038.4A CN103567745B (en) | 2013-11-01 | 2013-11-01 | A kind of continuous casting of molten steel withdrawal straightening machine pulling-straightening roller assembling device and assembly method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310535038.4A CN103567745B (en) | 2013-11-01 | 2013-11-01 | A kind of continuous casting of molten steel withdrawal straightening machine pulling-straightening roller assembling device and assembly method |
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| Publication Number | Publication Date |
|---|---|
| CN103567745A CN103567745A (en) | 2014-02-12 |
| CN103567745B true CN103567745B (en) | 2016-04-20 |
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| CN201310535038.4A Expired - Fee Related CN103567745B (en) | 2013-11-01 | 2013-11-01 | A kind of continuous casting of molten steel withdrawal straightening machine pulling-straightening roller assembling device and assembly method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201026561Y (en) * | 2007-03-20 | 2008-02-27 | 永城煤电集团有限责任公司 | Hydraulic pressure type bearing disassembly and assembly machine for maintaining supporting roller |
| CN101176967A (en) * | 2007-12-10 | 2008-05-14 | 广州市嘉特斯机电制造有限公司 | Bearing press-in device and method of use thereof |
| KR20090004965U (en) * | 2007-11-20 | 2009-05-25 | 현대제철 주식회사 | Apparatus for changing Roller |
| CN202147124U (en) * | 2011-07-08 | 2012-02-22 | 上海超惠通风环保设备有限公司 | Bearing mounting device of integral type bearing box |
| CN102729029A (en) * | 2012-06-25 | 2012-10-17 | 山东合太恒科技股份有限公司 | Bearing press mounting device |
-
2013
- 2013-11-01 CN CN201310535038.4A patent/CN103567745B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201026561Y (en) * | 2007-03-20 | 2008-02-27 | 永城煤电集团有限责任公司 | Hydraulic pressure type bearing disassembly and assembly machine for maintaining supporting roller |
| KR20090004965U (en) * | 2007-11-20 | 2009-05-25 | 현대제철 주식회사 | Apparatus for changing Roller |
| CN101176967A (en) * | 2007-12-10 | 2008-05-14 | 广州市嘉特斯机电制造有限公司 | Bearing press-in device and method of use thereof |
| CN202147124U (en) * | 2011-07-08 | 2012-02-22 | 上海超惠通风环保设备有限公司 | Bearing mounting device of integral type bearing box |
| CN102729029A (en) * | 2012-06-25 | 2012-10-17 | 山东合太恒科技股份有限公司 | Bearing press mounting device |
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| CN103567745A (en) | 2014-02-12 |
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