CN108356244B - Casting device for bimetal roller outer sleeve - Google Patents
Casting device for bimetal roller outer sleeve Download PDFInfo
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- CN108356244B CN108356244B CN201810407572.XA CN201810407572A CN108356244B CN 108356244 B CN108356244 B CN 108356244B CN 201810407572 A CN201810407572 A CN 201810407572A CN 108356244 B CN108356244 B CN 108356244B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/10—Accessories for centrifugal casting apparatus, e.g. moulds, linings therefor, means for feeding molten metal, cleansing moulds, removing castings
- B22D13/107—Means for feeding molten metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/02—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis
- B22D13/026—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis the longitudinal axis being vertical
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/08—Casting in, on, or around objects which form part of the product for building-up linings or coverings, e.g. of anti-frictional metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/08—Shaking, vibrating, or turning of moulds
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
The invention discloses a casting device for a bimetal roller outer sleeve, which comprises: the casting device comprises a molten steel casting cup, a casting cup support frame, a casting mold and a mold base, wherein the molten steel casting cup support frame is arranged on the casting cup support frame, the casting mold is arranged on the mold base and comprises an outer mold and a seamless pipe inner mold, and a roll outer sleeve casting space is formed between the outer mold and the seamless pipe inner mold; a molten steel casting hole is formed in the bottom of the molten steel casting cup and is positioned vertically above the casting space of the roller outer sleeve; a first driving mechanism for driving the molten steel casting cup to rotate is arranged on the casting cup supporting frame; or a second driving mechanism for driving the mold base to rotate is arranged below the mold base; at least one high-frequency microseismic device is arranged on the mould base. By arranging the high-frequency micro-vibrator, in the casting process and in a short time after the casting is finished, the die and the die base generate high-frequency micro-vibration, bubbles generated in the process of casting the alloy molten steel can be greatly floated upwards to be removed, and slag contained in the alloy molten steel can continuously float upwards to be removed from a riser. Thus, the quality and performance parameters of the roll jacket are greatly improved.
Description
Technical Field
The invention relates to the technical field of metal rollers, in particular to a casting device for a bimetal roller outer sleeve.
Background
The roller is used as a main working consumption part of the rolling mill and has direct influence on the product quality, the production efficiency and the like. Typically, bimetallic composite rolls are assembled from a roll shell and a roll core, which are tightly assembled together by interference fit or other means. Among them, the requirements for the performance of the roll jacket are very high, and if the requirements for the performance of the roll jacket are not met, the roll jacket is easy to cause the cracking of the broken blocks.
The existing bimetal roller jacket is cast by a steel die, a low-carbon steel pipe is arranged in the roller jacket, and a liquid alloy material is poured in the roller jacket by a normal method, so that the roller jacket and the low-carbon steel pipe are in a metallurgical fit state. No measures for preventing the product from generating defects such as air holes, slag inclusion and the like are taken. Therefore, defects such as air holes and slag inclusion are easily generated, and the overall quality and performance of the roller outer sleeve are affected.
At present, only improvement of the process operation can be generally carried out to solve the problems, but the final purpose is difficult to achieve due to too many process flows.
In view of the above, the present invention provides a casting device for a bimetal roll jacket, which can continuously remove bubbles and slag inclusions during the casting process of the roll jacket, and is a problem to be solved in the art.
Disclosure of Invention
The invention aims to provide a casting device of a bimetal roller outer sleeve, which can timely remove generated bubbles and molten steel inclusion slag in the process of casting the roller outer sleeve. In order to solve the problems, the invention provides a casting device for a bimetal roller outer sleeve, which has the technical scheme that:
the invention relates to a casting device for a bimetal roller outer sleeve, which comprises: the casting device comprises a molten steel casting cup, a casting cup support frame, a casting mold and a mold base, wherein the molten steel casting cup is arranged on the casting cup support frame, and the casting mold is arranged on the mold base. The casting mould comprises an outer mould and a seamless pipe inner mould, and a roller outer sleeve casting space is formed between the outer mould and the seamless pipe inner mould; and a molten steel casting hole is formed in the bottom of the molten steel casting cup and is positioned vertically above the casting space of the roller outer sleeve. A first driving mechanism for driving the molten steel casting cup to rotate is arranged on the casting cup supporting frame; or a second driving mechanism for driving the mold base to rotate is arranged below the mold base. And at least one high-frequency microseismic device is arranged on the mould base.
Compared with the casting device in the prior art, the casting device of the bimetal roller outer sleeve has the advantages that the fluidity of alloy molten steel is better during casting through the rotatable molten steel casting cup or the rotatable casting die, the transitional accumulation of the alloy molten steel in certain places can be avoided, and the distribution of the alloy molten steel is more uniform; while avoiding the bubbles to be compressed. By arranging the high-frequency micro-vibrator, in the casting process and in a short time after the casting is finished, the die and the die base generate high-frequency micro-vibration, bubbles generated in the process of casting the alloy molten steel can be greatly floated upwards to be removed, and slag contained in the alloy molten steel can continuously float upwards to be removed from a riser. Thus, the quality and performance parameters of the roll jacket are greatly improved.
As an improvement of the casting device of the bimetal roller outer sleeve, the longitudinal section of the molten steel casting cup passing through the central axis is in a w shape, and 20-40 molten steel casting holes are formed at the bottom of the molten steel casting cup at equal intervals. Namely, the center of the molten steel casting cup is in a protruding shape, and an annular groove is formed between the peripheral wall of the casting cup and the protrusion and used for containing alloy molten steel. The central bulge is in the shape of a circular truncated cone or the upper part is a semi-sphere and the lower part is in an arc transition structure. Therefore, the alloy molten steel is extruded towards the bottom of the groove after being poured into the casting cup, so that the pressure is higher and the casting is more complete when the alloy molten steel is cast.
Further, the molten steel casting hole is obliquely formed towards the center of the molten steel casting cup, and the middle axial direction of the molten steel casting hole is 15-35 degrees to the vertical direction. And the aperture of the molten steel casting hole is 1/5-1/15 of the thickness of the casting space of the roller outer sleeve.
Therefore, the molten steel casting hole is formed from top to bottom towards the center, so that the alloy molten steel is poured towards the upper part of the seamless pipe when the alloy molten steel is cast, the temperature of the seamless pipe can be rapidly increased, and the liquid alloy molten steel and the seamless pipe are better integrated.
As a further improvement of the casting device for the bimetallic roll jacket, the first driving mechanism includes a first bearing, a rotary table, a first driving gear and a first speed regulating motor, the rotary table is mounted on the casting cup support frame through the first bearing, the first speed regulating motor is mounted on one side of the casting cup support frame, the first driving gear is matched with a tooth wheel on the periphery of the rotary table, and the first speed regulating motor drives the rotary table to rotate through the first driving gear.
Furthermore, two sides of the casting cup support frame are symmetrically provided with the first speed regulating motor and the first driving gear respectively, and the first speed regulating motor and the first driving gear on two sides drive the rotary table in a double-drive mode.
The revolving platform is driven by the first speed regulating motor through the first driving gear, and the revolving platform is erected on the casting cup support frame through the first bearing, so that the driving is more labor-saving; and a first speed regulating motor and a first driving gear are symmetrically arranged on two sides of the casting cup support frame respectively, so that the rotation of the rotary table is more stable.
As another improvement of the casting device for the bimetallic roll sleeve, the second driving mechanism includes a second bearing, a second driving gear and a second speed regulating motor, the second bearing supports the mold base on the ground, the second speed regulating motor is coaxially arranged with the mold base, the second driving gear is matched with the annularly arranged tooth at the bottom of the mold base, and the second speed regulating motor drives the mold base to rotate through the second driving gear.
Therefore, the molten steel casting cup erected on the casting cup support frame does not rotate, and the same effect of good fluidity of the alloy molten steel in the casting process is achieved through the rotation of the mould. But the non-rotation of the molten steel casting cup ensures that the casting is more stable, and further avoids the risk of splashing of the alloy molten steel during casting.
The casting device for the bimetal roller outer sleeve has the beneficial effects that:
through the rotatable molten steel casting cup or the rotatable casting die, the fluidity of the alloy molten steel during casting can be better, the transitional accumulation of the alloy molten steel in certain places can be avoided, and the distribution of the alloy molten steel is more uniform; while avoiding the bubbles to be compressed.
By arranging the high-frequency micro-vibrator, in the casting process and in a short time after the casting is finished, the die and the die base generate high-frequency micro-vibration, bubbles generated in the process of casting the alloy molten steel can be greatly floated upwards to be removed, and slag contained in the alloy molten steel can continuously float upwards to be removed from a riser. Thus, the quality and performance parameters of the roll jacket are greatly improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic view of a first embodiment of the bimetallic roll shell casting apparatus of the present invention;
fig. 2 is a schematic view of a first embodiment of the bimetallic roll housing casting apparatus of the present invention.
The figures are labeled as follows:
1-molten steel casting cup; 2-casting cup support frame; 3-casting the mould; 4-a mold base; 5-a first drive mechanism; 6-a second drive mechanism; 7-high frequency microseismers; 11-molten steel casting holes; 31-external mold; 32-seamless pipe inner mold; 33-roll jacket casting space; 51-a first bearing; 52-a turntable; 53-a first drive gear; 54-a first adjustable speed motor; 61-a second bearing; 62-a second drive gear; 63-a second adjustable speed motor.
Detailed Description
In order to make the technical solutions in the embodiments of the present invention better understood and make the above objects, features, and advantages of the present invention more comprehensible, specific embodiments of the present invention are described below with reference to the accompanying drawings.
It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example one
Referring to fig. 1, the casting apparatus for a bimetallic roll shell of the present embodiment includes: the casting device comprises a molten steel casting cup 1, a casting cup support frame 2, a casting mold 3 and a mold base 4, wherein the molten steel casting cup 1 is erected on the casting cup support frame 2, and the casting mold 3 is installed on the mold base 4.
The casting mould 3 comprises an external mould 31 and a seamless pipe internal mould 32, and a roll jacket casting space 33 is formed between the external mould 31 and the seamless pipe internal mould 32; the bottom of the molten steel casting cup 1 is provided with a molten steel casting hole 11, and the molten steel casting hole 11 is positioned vertically above the casting space 33 of the roller outer sleeve.
The casting cup support frame 2 is provided with a first driving mechanism 5 for driving the molten steel casting cup 1 to rotate; the mould base 4 is provided with at least one high-frequency microseismic device 7.
Wherein, first actuating mechanism 5 includes first bearing 51, revolving platform 52, first driving gear 53 and first buncher 54, and revolving platform 52 installs on casting cup support frame 2 through first bearing 51, and first buncher 54 installs the one side at casting cup support frame 2, and first driving gear 53 sets up with the peripheral rodent looks adaptation of revolving platform 52, and first buncher 54 drives revolving platform 52 through first driving gear 53 and rotates.
Preferably, a first speed regulating motor 54 and a first driving gear 53 are symmetrically arranged on each side of the casting cup support frame 2, and the first speed regulating motor 54 and the first driving gear 53 on each side drive the rotary table 52 in a double-driving manner.
The longitudinal section of the molten steel casting cup 1 passing through the central axis is w-shaped, and 20-40 molten steel casting holes 11 are formed in the bottom of the molten steel casting cup 1 at equal intervals. More preferably, 30 molten steel casting holes 11 are formed at the bottom of the molten steel casting cup 1 at regular intervals.
The molten steel casting hole 11 is obliquely arranged towards the center of the molten steel casting cup 1, and the central axis of the molten steel casting hole 11 forms 15-35 degrees with the vertical direction. More preferably, the central axis of the molten steel casting hole 11 is at 20 to 25 ° to the vertical direction.
The aperture of the molten steel casting hole 11 is 1/5-1/15 of the thickness of the casting space 33 of the roller outer sleeve.
The working principle of the casting device for the bimetal roller outer sleeve of the embodiment is as follows:
firstly, the mold base 4 is cleaned, the stability is checked, the casting mold 3 is mounted and fixed on the mold base 4, namely the outer mold 31 and the seamless pipe inner mold 32 are correspondingly mounted on the mold base 4, and the distance is adjusted to ensure that the roll outer sleeve casting space 33 is a preset value.
Then, the position of the molten steel casting cup 1 is adjusted, so that the molten steel casting hole 11 is positioned vertically above the roll outer sleeve casting space 33; alloy molten steel is poured into the molten steel casting cup 1, the first speed regulating motor 54 is started, and the first speed regulating motor 54 drives the rotary table 52 to slowly rotate on the first bearing 51 through the first driving gear 53. The alloy molten steel in the molten steel casting cup 1 is cast into the roll mantle casting space 33 in a shower type manner.
And finally, when the alloy molten steel is cast or within 60 seconds after the alloy molten steel is cast, the high-frequency micro-vibrator 7 is started, and air bubbles and slag inclusions in the liquid alloy steel water can quickly float up to a riser by the vibration of the high-frequency micro-vibrator 7, so that the slag inclusions are removed. The starting time of the high-frequency microseismer 7 is 1-3 minutes after the casting is finished.
Example two
Referring to fig. 2, the casting apparatus for a bimetallic roll outer sleeve of the present embodiment includes: the casting device comprises a molten steel casting cup 1, a casting cup support frame 2, a casting mold 3 and a mold base 4, wherein the molten steel casting cup 1 is erected on the casting cup support frame 2, and the casting mold 3 is installed on the mold base 4.
The casting mould 3 comprises an external mould 31 and a seamless pipe internal mould 32, and a roll jacket casting space 33 is formed between the external mould 31 and the seamless pipe internal mould 32; the bottom of the molten steel casting cup 1 is provided with a molten steel casting hole 11, and the molten steel casting hole 11 is positioned vertically above the casting space 33 of the roller outer sleeve.
A second driving mechanism 6 for driving the mold base 4 to rotate is arranged below the mold base 4; the mould base 4 is provided with at least one high-frequency microseismic device 7.
Wherein, second actuating mechanism 6 includes second bearing 61, second driving gear 62 and second buncher 63, and second bearing 61 supports mould base 4 on ground, and second buncher 63 sets up with mould base 4 is coaxial, and second driving gear 62 sets up with the mesh looks adaptation that mould base 4 bottom is the annular and sets up, and second buncher 63 passes through second driving gear 62 drive mould base 4 rotatoryly.
Preferably, the longitudinal section of the molten steel casting cup 1 passing through the central axis is w-shaped, and 20 to 40 molten steel casting holes 11 are formed at the bottom of the molten steel casting cup 1 at equal intervals. More preferably, 30 molten steel casting holes 11 are formed at the bottom of the molten steel casting cup 1 at regular intervals.
The molten steel casting hole 11 is obliquely arranged towards the center of the molten steel casting cup 1, and the central axis of the molten steel casting hole 11 forms 15-35 degrees with the vertical direction. More preferably, the central axis of the molten steel casting hole 11 is at 20 to 25 ° to the vertical direction.
The aperture of the molten steel casting hole 11 is 1/5-1/15 of the thickness of the casting space 33 of the roller outer sleeve.
The working principle of the casting device for the bimetal roller outer sleeve of the embodiment is as follows:
firstly, the mold base 4 is cleaned, the stability is checked, the casting mold 3 is mounted and fixed on the mold base 4, namely the outer mold 31 and the seamless pipe inner mold 32 are correspondingly mounted on the mold base 4, and the distance is adjusted to ensure that the roll outer sleeve casting space 33 is a preset value.
Then, the alloy molten steel is poured into the molten steel casting cup 1, the second speed regulating motor 63 is started, and the second speed regulating motor 63 drives the mold base 4 to rotate slowly on the second bearing 61 through the second driving gear 62. The alloy molten steel in the molten steel casting cup 1 is cast into the roll mantle casting space 33 in a shower type manner.
And finally, when the alloy molten steel is cast or within 60 seconds after the alloy molten steel is cast, the high-frequency micro-vibrator 7 is started, and air bubbles and slag inclusions in the liquid alloy steel water can quickly float up to a riser by the vibration of the high-frequency micro-vibrator 7, so that the slag inclusions are removed. The starting time of the high-frequency microseismer 7 is 1-3 minutes after the casting is finished.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.
The embodiments of the present invention are described in detail above with reference to the drawings, but the present invention is not limited to the described embodiments. Various changes, modifications, substitutions and alterations to these embodiments will occur to those skilled in the art without departing from the spirit and scope of the present invention.
Claims (4)
1. A casting device for bimetallic roll jackets, said casting device comprising: the casting device comprises a molten steel casting cup (1), a casting cup support frame (2), a casting mold (3) and a mold base (4), wherein the molten steel casting cup (1) is erected on the casting cup support frame (2), the casting mold (3) is arranged on the mold base (4),
the casting mould (3) comprises an outer mould (31) and a seamless pipe inner mould (32), and a roll outer sleeve casting space (33) is formed between the outer mould (31) and the seamless pipe inner mould (32); the roller sleeve casting device is characterized in that a molten steel casting hole (11) is formed in the bottom of the molten steel casting cup (1), the molten steel casting hole (11) is located vertically above the roller sleeve casting space (33), the longitudinal section of the molten steel casting cup (1) passing through the central axis is in a w shape, 20-40 molten steel casting holes (11) are formed in the bottom of the molten steel casting cup (1) at equal intervals, the molten steel casting hole (11) is obliquely formed towards the center of the molten steel casting cup (1), the central axis of the molten steel casting hole (11) and the vertical direction form a range of 15-35 degrees, and the aperture of the molten steel casting hole (11) is 1/5-1/15 degrees of the thickness of the roller sleeve casting space (33);
the casting cup support frame (2) is provided with a first driving mechanism (5) for driving the molten steel casting cup (1) to rotate; or a second driving mechanism (6) for driving the mold base (4) to rotate is arranged below the mold base (4);
the mould base (4) is provided with at least one high-frequency microseismic device (7).
2. The casting device of the bimetal roll jacket of claim 1, wherein the first driving mechanism (5) comprises a first bearing (51), a rotary table (52), a first driving gear (53) and a first speed regulating motor (54), the rotary table (52) is mounted on the casting cup support frame (2) through the first bearing (51), the first speed regulating motor (54) is mounted on one side of the casting cup support frame (2), the first driving gear (53) is matched with the teeth on the periphery of the rotary table (52), and the first speed regulating motor (54) drives the rotary table (52) to rotate through the first driving gear (53).
3. The casting device of the bimetal roll jacket according to claim 2, characterized in that one first speed regulating motor (54) and one first driving gear (53) are symmetrically arranged on two sides of the casting cup support frame (2), and the first speed regulating motor (54) and the first driving gear (53) on the two sides drive the rotary table (52) in a double driving mode.
4. The casting device of the bimetal roll jacket according to claim 1 or 2, wherein the second driving mechanism (6) comprises a second bearing (61), a second driving gear (62) and a second speed regulating motor (63), the second bearing (61) supports the mold base (4) on the ground, the second speed regulating motor (63) is coaxially arranged with the mold base (4), the second driving gear (62) is arranged in a manner of being matched with the teeth arranged in an annular shape at the bottom of the mold base (4), and the second speed regulating motor (63) drives the mold base (4) to rotate through the second driving gear (62).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810407572.XA CN108356244B (en) | 2018-05-02 | 2018-05-02 | Casting device for bimetal roller outer sleeve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810407572.XA CN108356244B (en) | 2018-05-02 | 2018-05-02 | Casting device for bimetal roller outer sleeve |
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| CN108356244A CN108356244A (en) | 2018-08-03 |
| CN108356244B true CN108356244B (en) | 2019-12-27 |
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| CN201810407572.XA Active CN108356244B (en) | 2018-05-02 | 2018-05-02 | Casting device for bimetal roller outer sleeve |
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| CN109513902A (en) * | 2018-11-28 | 2019-03-26 | 湖南四昉新材料有限公司 | A kind of processing method, processing unit (plant) and the bimetal roller set of bimetal roller set |
| CN109591259B (en) * | 2018-12-22 | 2020-12-01 | 苏州骏创模具工业有限公司 | Injection mold for automotive interior parts |
| CN112338150B (en) * | 2020-10-20 | 2022-03-18 | 宁夏朗盛精密制造技术有限公司 | Micro-seismic pouring process for pump valve steel castings |
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| LU88549A1 (en) * | 1994-10-24 | 1995-02-01 | Magotteaux Int | Method for manufacturing a bimetallic grinding roller and grinding roller obtained by the implementation of this process |
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