阅读说明：本技术 一种粗轧机架工具钢轧辊及其制备方法 (Roughing stand tool steel roll and preparation method thereof ) 是由 邵黎军 符多友 奚国仙 于 2021-11-02 设计创作，主要内容包括：本发明公开了一种粗轧机架工具钢轧辊及其制备方法,属于轧辊技术领域。一种粗轧机架工具钢轧辊,包括轧辊主体,轧辊主体的两端均连接有辊颈,辊颈远离轧辊主体的一端连接有轴头,辊颈包括第一颈部、第二颈部和第三颈部,第一颈部、第二颈部和第三颈部之间连接有加强杆,第二颈部外壁开凿有用于出油的第一通孔,辊颈内壁转动连接有储油块,储油块外壁开凿有与第一通孔相配合的第二通孔,辊颈内设置有与储油块相配合的出油机构,第一颈部和第三颈部均与第二颈部之间设置有回油通道；本发明通过辊颈内部间歇性的出油,从而保证辊颈与轴承之间的润滑油含量,进而减少轧辊轴颈与轴承之间的磨损,延长使用寿命,降低成本。(The invention discloses a rough rolling frame tool steel roller and a preparation method thereof, belonging to the technical field of rollers. A roughing stand tool steel roll comprises a roll main body, wherein roll necks are connected to two ends of the roll main body, a shaft head is connected to one end, away from the roll main body, of each roll neck, each roll neck comprises a first neck, a second neck and a third neck, reinforcing rods are connected among the first neck, the second neck and the third neck, a first through hole used for oil outlet is formed in the outer wall of the second neck, an oil storage block is rotatably connected to the inner wall of each roll neck, a second through hole matched with the first through hole is formed in the outer wall of the oil storage block, an oil outlet mechanism matched with the oil storage block is arranged in each roll neck, and an oil return channel is formed between each of the first neck and the second neck; according to the invention, through intermittent oil outlet in the roll neck, the content of lubricating oil between the roll neck and the bearing is ensured, so that the abrasion between the roll neck and the bearing is reduced, the service life is prolonged, and the cost is reduced.)

1. The roughing stand tool steel roll comprises a roll main body (1), wherein roll necks (2) are connected to two ends of the roll main body (1), a shaft head (3) is connected to one end, far away from the roll main body (1), of each roll neck (2), the roll neck (2) is characterized by comprising a first neck (201), a second neck (202) and a third neck (203), reinforcing rods (14) are connected among the first neck (201), the second neck (202) and the third neck (203), a first through hole (4) used for oil discharging is formed in the outer wall of the second neck (202), an oil storage block (5) is rotatably connected to the inner wall of the roll neck (2), a second through hole (501) matched with the first through hole (4) is formed in the outer wall of the oil storage block (5), and an oil discharging mechanism matched with the oil storage block (5) is arranged in the roll neck (2), an oil return channel (6) is arranged between the first neck (201) and the second neck (202) and between the third neck (203).

2. A roughing stand tool steel roll according to claim 1, characterised in that said oil delivery means comprises a mounting frame (7) fixed to the inner wall of the roll neck (2), the outer wall of the mounting rack (7) is connected with a driving motor (8), the output end of the driving motor (8) is connected with a driving shaft (801), one end of the driving shaft (801) far away from the driving motor (8) is connected with a first connecting plate (802), the outer wall of the first connecting plate (802) is movably connected with a second connecting plate (803), the second connecting plate (803) is rotatably connected with a movable rod (804) through a pin shaft, one end of the moving rod (804) far away from the second connecting plate (803) is connected with a piston (805), the piston (805) is connected in the oil storage block (5) in a sliding way, and an oil storage cavity (9) is formed between the piston (805) and the inner wall of the oil storage block (5).

3. A roughing stand tool steel roll according to claim 2, characterised in that an oil storage tank (502) is provided in the oil storage block (5), an oil passage is provided between the oil storage tank (502) and the oil storage chamber (9), and a check valve is provided in both the oil passage and the second through hole (501).

4. A roughing stand tool steel roll according to claim 3, characterised in that an oil feeding pipeline (16) is arranged in said oil storage block (5), the oil inlet end of said oil feeding pipeline (16) is arranged in said oil return channel (6), and the oil outlet end of said oil feeding pipeline (16) is communicated with said oil storage tank (502).

5. A roughing stand tool steel roll according to claim 3, characterised in that a first bevel gear (8011) is attached to the outer wall of said drive shaft (801), and a gear ring (503) is attached to the outer wall of said oil reservoir block (5) and is engaged with said first bevel gear (8011).

6. A roughing stand tool steel roll according to claim 4, characterized in that said oil return channel (6) comprises an oil return groove (601) and an oil return plate, an oil return cavity (10) is provided between two of said oil return grooves (601), both sides of the inner wall of said oil return groove (601) are provided with an inclined plane, said oil return plate comprises a first guide plate (602) and a second guide plate (603), two of said first guide plate (602) are respectively connected with the first neck (201) and the third neck (203), and two of said second guide plate (603) are respectively connected with both sides of the outer wall of the second neck (202).

7. The roughing stand tool steel roll according to claim 6, characterized in that a fixing rod (11) is connected to an outer wall of the oil storage block (5), a fan blade (111) is arranged on an outer wall of the fixing rod (11), a first air chamber (12) is arranged in the third neck (203), an air inlet of the first air chamber (12) is arranged at an inner edge of the third neck (203), and an air outlet of the first air chamber (12) is arranged in the oil return groove (601).

8. The roughing stand tool steel roll according to claim 7, characterized in that a second air chamber (13) is further formed in the third neck portion (203), an air inlet of the second air chamber (13) is arranged at the center of the inside of the third neck portion (203), an air outlet of the second air chamber (13) is connected with a reinforcing rod (14), the reinforcing rod (14) is arranged as a hollow tube, an air groove (15) is formed in the first neck portion (201), and the air groove (15) and the second air chamber (13) are communicated with each other through the hollow reinforcing rod (14).

9. Roughing stand tool steel roll according to claim 8 characterized in that said first air chamber (12) and air outlet of the air duct (15) are parallel to the two first deflectors (602), respectively.

10. A method for producing a roughing stand tool steel roll according to anyone of claims 1 to 9, characterized in that it comprises the following steps:

s1: the roller is prepared from the following raw materials in parts by weight: 1.60-1.80% of carbon, 1.30-1.50% of silicon, 0.60-1.00% of manganese, 0.60-1.20% of chromium, 0.80-1.20% of nickel, 0.30-0.60% of molybdenum, 0.10-0.30% of vanadium and 0.10-0.30% of niobium;

s2: smelting and pouring: during smelting, when molten steel is at 1450-1480 ℃, slagging is carried out by adopting a slagging material mixed by quartz sand, lump lime, fluorite powder and cullet, when the temperature of the steel is 1500-1550 ℃, slagging is carried out, then 2-4 kg/ton yttrium-based heavy rare earth molten steel modificator is added, harmful elements are removed, when the temperature of the steel is 1580-1620 ℃, 0.03% of aluminum is added for deoxidation, 0.6-0.8% of CaST nodulizer is added during tapping for nodulizing treatment, 0.4-0.6% of BaCa inoculant is used for inoculation after the nodulizing is finished, and an electromagnetic stirrer is used for stirring for 1-2 minutes during inoculation; oscillating by using argon, then calming for 8-10 min, and pouring when the temperature of the steel reaches the liquid phase temperature plus 60-80 ℃; starting an electromagnetic vibrator for slight vibration during pouring, improving the density of molten steel during solidification and crystallization, refining a microstructure, eliminating a shrinkage porosity area of a roller body structure, and preparing a roller blank;

s3: and (3) heat treatment: adopting a hot box opening process, opening the box when the roller temperature is 550-650 ℃, performing furnace diffusion annealing, and performing normalizing and tempering after complete austenitizing: heating to 10 ℃ per hour, and keeping the temperature for 6 hours when the temperature reaches 660 ℃; heating to 15 ℃ per hour, and keeping the temperature for 8 hours when the temperature reaches 880 ℃; heating to 20 ℃ per hour, and keeping the temperature for 10 hours when the temperature reaches 920 ℃; then spray quenching, rolling to 380-420 ℃, entering a furnace for tempering, raising the temperature by 15 ℃ per hour, keeping the temperature for 10 hours when the temperature reaches 560-580 ℃, and then cooling the furnace;

s4: and after the roller is cooled to normal temperature, carrying out fine grinding processing and then removing processing burrs.

Technical Field

The invention relates to the technical field of rollers, in particular to a rough rolling frame tool steel roller and a preparation method thereof.

Background

Rolls are the primary working components and tools on a rolling mill that produce continuous plastic deformation of metal. The roller mainly comprises a roller body, a roller neck and a shaft head. The roll body is the middle part of the roll actually participating in rolling metal and has a smooth cylindrical or grooved surface; the roll neck is arranged in the bearing and transmits the rolling force to the frame through the bearing seat and the screwdown gear; the driving end shaft head is connected with the gear seat through a connecting shaft, and the rotating torque of the motor is transmitted to the roller. The rolls may be arranged in two, three, four or more rolls in the mill stand.

Among the various parts of the roll, the roll journal is one of the parts with the worst working environment and is the main part of the failure and damage of the roll workpiece. The roll journal is in full-film lubrication in a stable operation stage, the lubrication film efficiency is reduced in a low-speed or operation/stop stage, the roll journal is in a mixed boundary lubrication state, the lubricating oil is extruded out of a contact area in a running-in stage, an oil film is too thin to form a sufficient boundary film, and in addition, the roll continuously works for a long time, and a local contact surface is in a lean lubrication state, so that the friction coefficient of the roll journal is high, the service life of the roll journal and a bearing matched with the roll journal is not high, the service life of the journal and the bearing is generally only one year, and the production cost is high.

Disclosure of Invention

The invention aims to solve the problems that in the prior art, the roll neck and the bearing are in a poor oil lubrication state, so that the roll neck and the bearing are high in abrasion and short in service life, and provides a rough rolling frame tool steel roll and a preparation method thereof.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a roughing frame instrument steel roll, includes the roll main part, the both ends of roll main part all are connected with the roll neck, the one end that the roll main part was kept away from to the roll neck is connected with the spindle nose, the roll neck includes first neck, second neck and third neck, be connected with the stiffener between first neck, second neck and the third neck, the second neck outer wall is opened and is dug there is the first through-hole that is used for producing oil, roll neck inner wall rotates and is connected with the oil storage piece, the oil storage piece outer wall is opened and is dug there is the second through-hole with first through-hole matched with, be provided with in the roll neck and produce oil mechanism with oil storage piece matched with, first neck and third neck all with the second neck between be provided with return oil passageway.

Preferably, the mechanism of producing oil is including setting firmly the mounting bracket at the roller neck inner wall, mounting bracket outer wall connection has driving motor, driving motor's output is connected with the drive shaft, driving motor's one end is kept away from to the drive shaft is connected with first even board, first board outer wall swing joint has the second even board, the second is even connected with the carriage release lever through the round pin hub rotation, the carriage release lever is kept away from the second and is connected with the piston even one end of board, piston sliding connection is in the oil storage piece, just be formed with the oil storage chamber between piston and the oil storage piece inner wall.

Preferably, an oil storage tank is arranged in the oil storage block, an oil duct is arranged between the oil storage tank and the oil storage cavity, and a check valve is arranged in each of the oil duct and the second through hole.

Preferably, an oil feeding pipeline is arranged in the oil storage block, the oil inlet end of the oil feeding pipeline is arranged in the oil return channel, and the oil outlet end of the oil feeding pipeline is communicated with the oil storage tank.

Preferably, the outer wall of the driving shaft is connected with a first bevel gear, and the outer wall of the oil storage block is connected with a gear ring which is meshed with the first bevel gear.

Preferably, the oil return channel includes oil return groove and oil return plate, two be provided with back oil chamber between the oil return groove, oil return groove inner wall both sides all are provided with the inclined plane, oil return plate includes first guide plate and second guide plate, two first guide plate links to each other with first neck and third neck respectively, two the outer wall both sides at the second neck are connected respectively to the second guide plate.

Preferably, the outer wall of the oil storage block is connected with a fixed rod, the outer wall of the fixed rod is provided with a fan blade, a first air cavity is formed in the third neck, the air inlet of the first air cavity is formed in the inner edge of the third neck, and the air outlet of the first air cavity is formed in the oil return groove.

Preferably, a second air cavity is further formed in the third neck, an air inlet of the second air cavity is formed in the center of the inside of the third neck, an air outlet of the second air cavity is connected with the reinforcing rod, the reinforcing rod is a hollow tube, an air groove is formed in the first neck, and the air groove and the second air cavity are communicated with each other through the hollow reinforcing rod.

Preferably, the air outlets of the first air cavity and the air duct are parallel to the two first guide plates respectively.

The invention also discloses a preparation method of the rough rolling frame tool steel roll, which comprises the following steps:

s1: the roller is prepared from the following raw materials in parts by weight: 1.60-1.80% of carbon, 1.30-1.50% of silicon, 0.60-1.00% of manganese, 0.60-1.20% of chromium, 0.80-1.20% of nickel, 0.30-0.60% of molybdenum, 0.10-0.30% of vanadium and 0.10-0.30% of niobium;

s2: smelting and pouring: during smelting, when molten steel is at 1450-1480 ℃, slagging is carried out by adopting a slagging material mixed by quartz sand, lump lime, fluorite powder and cullet, when the temperature of the steel is 1500-1550 ℃, slagging is carried out, then 2-4 kg/ton yttrium-based heavy rare earth molten steel modificator is added, harmful elements are removed, when the temperature of the steel is 1580-1620 ℃, 0.03% of aluminum is added for deoxidation, 0.6-0.8% of CaST nodulizer is added during tapping for nodulizing treatment, 0.4-0.6% of BaCa inoculant is used for inoculation after the nodulizing is finished, and an electromagnetic stirrer is used for stirring for 1-2 minutes during inoculation; oscillating by using argon, then calming for 8-10 min, and pouring when the temperature of the steel reaches the liquid phase temperature plus 60-80 ℃; starting an electromagnetic vibrator for slight vibration during pouring, improving the density of molten steel during solidification and crystallization, refining a microstructure, eliminating a shrinkage porosity area of a roller body structure, and preparing a roller blank;

s3: and (3) heat treatment: adopting a hot box opening process, opening the box when the roller temperature is 550-650 ℃, performing furnace diffusion annealing, and performing normalizing and tempering after complete austenitizing: heating to 10 ℃ per hour, and keeping the temperature for 6 hours when the temperature reaches 660 ℃; heating to 15 ℃ per hour, and keeping the temperature for 8 hours when the temperature reaches 880 ℃; heating to 20 ℃ per hour, and keeping the temperature for 10 hours when the temperature reaches 920 ℃; then spray quenching, rolling to 380-420 ℃, entering a furnace for tempering, raising the temperature by 15 ℃ per hour, keeping the temperature for 10 hours when the temperature reaches 560-580 ℃, and then cooling the furnace;

s4: and after the roller is cooled to normal temperature, carrying out fine grinding processing and then removing processing burrs.

Compared with the prior art, the invention provides a rough rolling frame tool steel roll and a preparation method thereof, and the rough rolling frame tool steel roll has the following beneficial effects:

1. according to the roughing stand tool steel roll and the preparation method thereof, lubricating oil in the oil storage block intermittently penetrates through the first through hole and the second through hole through the oil outlet mechanism, so that the content of the lubricating oil between the roll neck and the bearing is ensured, the abrasion between the roll neck and the bearing is reduced, the service life is prolonged, and the cost is reduced.

2. According to the rough rolling frame tool steel roller and the preparation method thereof, the oil return channels are arranged between the first neck part and the second neck part and between the third neck part and the second neck part, so that lubricating oil extruded out of a roller neck and bearing contact area in a running-in stage can be recycled, and the use waste of the lubricating oil is avoided.

3. According to the rough rolling stand tool steel roll and the preparation method thereof, the oil storage tank is arranged, so that the oil quantity due to intermittent oil outlet loss in the oil storage cavity can be supplemented, and the oil quantity of the oil storage tank can be supplemented through the oil feeding pipeline.

4. According to the roughing stand tool steel roll and the preparation method thereof, through the arrangement of the first air cavity, the second air cavity and the air groove, air blown by the fan blades can act on lubricating oil recovered in the oil return channel, so that the lubricating oil smoothly enters the oil return cavity, the lubricating oil in the oil return channel below is prevented from leaking again, the lubricating oil can be effectively recycled, and heat generated by friction between a roll neck and a bearing can be reduced to a certain extent by the fan blades.

Drawings

Fig. 1 is a schematic view of the structure of the roll of the present invention.

Fig. 2 is a schematic structural view of a portion a in fig. 1 according to the present invention.

FIG. 3 is a schematic view of the construction of the roll neck of the present invention.

Fig. 4 is a schematic structural view of a second neck according to the present invention.

Fig. 5 is a schematic structural diagram of the oil storage block of the present invention.

FIG. 6 is a first schematic cross-sectional view of the roll neck of the present invention.

FIG. 7 is a schematic cross-sectional view of the roll neck of the present invention.

Fig. 8 is a schematic structural diagram of a portion B in fig. 6 according to the present invention.

Fig. 9 is a schematic structural view of the oil discharging mechanism of the present invention.

Fig. 10 is a schematic cross-sectional view of a third neck according to the present invention.

In the figure: 1. a roll body; 2. a roll neck; 201. a first neck portion; 202. a second neck portion; 203. a third neck portion; 3. a shaft head; 4. a first through hole; 5. an oil storage block; 501. a second through hole; 502. an oil storage tank; 503. a gear ring; 6. an oil return passage; 601. an oil return groove; 602. a first baffle; 603. a second baffle; 7. a mounting frame; 8. a drive motor; 801. a drive shaft; 8011. a first bevel gear; 802. a first connecting plate; 803. a second connecting plate; 804. a travel bar; 805. a piston; 9. an oil storage chamber; 10. an oil return cavity; 11. fixing the rod; 111. a fan blade; 12. a first air chamber; 13. a second air chamber; 14. a reinforcing bar; 15. an air duct; 16. an oil feeding pipeline.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Example 1:

referring to fig. 1-9, a roughing frame tool steel roll comprises a roll main body 1, two ends of the roll main body 1 are connected with roll necks 2, one ends, far away from the roll main body 1, of the roll necks 2 are connected with shaft heads 3, each roll neck 2 comprises a first neck 201, a second neck 202 and a third neck 203, reinforcing rods 14 are connected between the first neck 201 and the second neck 202, first through holes 4 used for oil discharging are formed in the outer walls of the second necks 202, oil storage blocks 5 are connected to the inner walls of the roll necks 2 in a rotating mode, second through holes 501 matched with the first through holes 4 are formed in the outer walls of the oil storage blocks 5, oil discharging mechanisms matched with the oil storage blocks 5 are arranged in the roll necks 2, and oil return passages 6 are formed between the first necks 201 and the third necks 203 and the second necks 202.

When the roller main body 1 is used for shaping, the second neck 202 of the roller neck 2 is connected with the bearing seat of the rack, when the roller works, the oil outlet mechanism is controlled to work, the oil outlet mechanism drives lubricating oil in the oil storage block 5 to sequentially pass through the second through hole 501 and the first through hole 4, and the lubricating oil enters the space between the roller neck 2 and the bearing, so that the content of the lubricating oil between the roller neck 2 and the bearing is ensured, the abrasion between the roller neck and the bearing is reduced, the service life is prolonged, and the cost is reduced.

Example 2:

referring to fig. 2-9, a rough rolling frame tool steel roll, substantially the same as in embodiment 1, further, the oil outlet mechanism includes a mounting bracket 7 fixedly arranged on the inner wall of the roll neck 2, the outer wall of the mounting bracket 7 is connected with a driving motor 8, the output end of the driving motor 8 is connected with a driving shaft 801, one end of the driving shaft 801 far away from the driving motor 8 is connected with a first connecting plate 802, the outer wall of the first connecting plate 802 is movably connected with a second connecting plate 803, the second connecting plate 803 is rotatably connected with a movable rod 804 through a pin shaft, one end of the movable rod 804 far away from the second connecting plate 803 is connected with a piston 805, the piston 805 is slidably connected in an oil storage block 5, and an oil storage cavity 9 is formed between the piston 805 and the inner wall of the oil storage block 5.

Further, an oil storage groove 502 is formed in the oil storage block 5, an oil passage is formed between the oil storage groove 502 and the oil storage cavity 9, and a one-way valve is arranged in the oil passage and the second through hole 501.

Further, an oil filling pipeline 16 is arranged in the oil storage block 5, the oil inlet end of the oil filling pipeline 16 is arranged in the oil return channel 6, and the oil outlet end of the oil filling pipeline 16 is communicated with the oil storage tank 502.

The working principle is as follows: by controlling the operation of the driving motor 8, the output end of the driving motor 8 drives the driving shaft 801 to rotate, the driving shaft 801 drives the first connecting plate 802 and the second connecting plate 803 to move, the second connecting plate 803 drives the moving rod 804 to move and pulls the piston 805 to reciprocate in the oil storage block 5, the piston 805 extrudes lubricating oil in the oil storage cavity 9, the lubricating oil is discharged through the second through hole 501, the oil storage cavity 9 can be supplemented with the oil amount due to the intermittent oil discharge loss by arranging the oil storage groove 502, and the oil storage groove 502 can be supplemented with the oil amount through the oil feeding pipeline 16.

As a preferred technical solution of the present invention, the outer wall of the driving shaft 801 is connected with a first bevel gear 8011, and the outer wall of the oil storage block 5 is connected with a gear ring 503 which is engaged with the first bevel gear 8011; the gear ring 503 is engaged with the first bevel gear 8011 on the outer side of the driving shaft 801, and then the gear ring 503 drives the oil storage block 5 to rotate, so that the second through hole 501 of the oil storage block 5 is staggered with the first through hole 4 of the roll neck 2, when the first through hole 4 is overlapped with the second through hole 501, the lubricating oil can pass through the second through hole 501 and be directly discharged from the first through hole 4, and the oil consumption of the lubricating oil is reduced.

Example 3:

referring to fig. 1-9, a roughing stand tool steel roll, substantially the same as in embodiment 2, further, the oil return channel 6 includes an oil return groove 601 and an oil return plate, an oil return cavity 10 is provided between the two oil return grooves 601, both sides of the inner wall of the oil return groove 601 are provided with inclined planes, the oil return plate includes a first guide plate 602 and a second guide plate 603, the two first guide plates 602 are respectively connected with the first neck 201 and the third neck 203, and the two second guide plates 603 are respectively connected to both sides of the outer wall of the second neck 202; all be provided with oil return passage 6 between first neck 201 and third neck 203 and the second neck 202, can carry out recycle to the lubricating oil of being extruded second neck 202 and bearing contact area when running-in stage, avoid causing the use of lubricating oil extravagant.

Example 4:

referring to fig. 6-10, a rough rolling frame tool steel roll is substantially the same as that of embodiment 3, further, the outer wall of the oil storage block 5 is connected with a fixing rod 11, the outer wall of the fixing rod 11 is provided with a fan blade 111, a third neck 203 is internally provided with a first air cavity 12, an air inlet of the first air cavity 12 is arranged at the inner edge of the third neck 203, and an air outlet of the first air cavity 12 is arranged in an oil return groove 601.

Furthermore, a second air cavity 13 is further formed in the third neck 203, an air inlet of the second air cavity 13 is formed in the center of the inside of the third neck 203, an air outlet of the second air cavity 13 is connected with the reinforcing rod 14, the reinforcing rod 14 is a hollow tube, an air groove 15 is formed in the first neck 201, and the air groove 15 and the second air cavity 13 are communicated with each other through the hollow reinforcing rod 14.

Further, the air outlets of the first air cavity 12 and the air duct 15 are parallel to the two first flow deflectors 602 respectively.

The oil storage block 5 rotates under the engagement of the first bevel gear 8011 and the gear ring 503, and drives the fan blade 111 to blow air to the third neck 203 through the fixing rod 11, so that air passes through the first air cavity 12, the second air cavity 13 and the air groove 15 respectively, and the air outlets of the first air cavity 12 and the air groove 15 are parallel to the two first guide plates 602 respectively, so that the air blown by the fan blade 111 acts on the lubricating oil recovered in the oil return channel 6, the lubricating oil smoothly enters the oil return cavity 10, the lubricating oil in the oil return channel 6 below is prevented from leaking again, the lubricating oil can be effectively recycled, and the heat generated by friction between the roller neck 2 and the bearing can be reduced to a certain extent by the fan blade 111.

Example 5

A preparation method of a rough rolling frame tool steel roller comprises the following steps:

s1: the roller is prepared from the following raw materials in parts by weight: 1.60-1.80% of carbon, 1.30-1.50% of silicon, 0.60-1.00% of manganese, 0.60-1.20% of chromium, 0.80-1.20% of nickel, 0.30-0.60% of molybdenum, 0.10-0.30% of vanadium and 0.10-0.30% of niobium;

s2: smelting and pouring: during smelting, when molten steel is at 1450-1480 ℃, slagging is carried out by adopting a slagging material mixed by quartz sand, lump lime, fluorite powder and cullet, when the temperature of the steel is 1500-1550 ℃, slagging is carried out, then 2-4 kg/ton yttrium-based heavy rare earth molten steel modificator is added, harmful elements are removed, when the temperature of the steel is 1580-1620 ℃, 0.03% of aluminum is added for deoxidation, 0.6-0.8% of CaST nodulizer is added during tapping for nodulizing treatment, 0.4-0.6% of BaCa inoculant is used for inoculation after the nodulizing is finished, and an electromagnetic stirrer is used for stirring for 1-2 minutes during inoculation; oscillating by using argon, then calming for 8-10 min, and pouring when the temperature of the steel reaches the liquid phase temperature plus 60-80 ℃; starting an electromagnetic vibrator for slight vibration during pouring, improving the density of molten steel during solidification and crystallization, refining a microstructure, eliminating a shrinkage porosity area of a roller body structure, and preparing a roller blank;

s3: and (3) heat treatment: adopting a hot box opening process, opening the box when the roller temperature is 550-650 ℃, performing furnace diffusion annealing, and performing normalizing and tempering after complete austenitizing: heating to 10 ℃ per hour, and keeping the temperature for 6 hours when the temperature reaches 660 ℃; heating to 15 ℃ per hour, and keeping the temperature for 8 hours when the temperature reaches 880 ℃; heating to 20 ℃ per hour, and keeping the temperature for 10 hours when the temperature reaches 920 ℃; then spray quenching, rolling to 380-420 ℃, entering a furnace for tempering, raising the temperature by 15 ℃ per hour, keeping the temperature for 10 hours when the temperature reaches 560-580 ℃, and then cooling the furnace;

s4: and after the roller is cooled to normal temperature, carrying out fine grinding processing and then removing processing burrs.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.