CN213162984U - Chamfer foot roller for preventing casting blank indentation - Google Patents
Chamfer foot roller for preventing casting blank indentation Download PDFInfo
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- CN213162984U CN213162984U CN202021543938.5U CN202021543938U CN213162984U CN 213162984 U CN213162984 U CN 213162984U CN 202021543938 U CN202021543938 U CN 202021543938U CN 213162984 U CN213162984 U CN 213162984U
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- casting blank
- chamfering
- chamfer
- roller
- preventing
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Abstract
The utility model belongs to the field of metal solidification and continuous casting, in particular to a chamfer foot roll for preventing casting blank indentation from generating, which comprises a chamfer roll, a chamfer roll supporting seat, a rotating shaft and a fixed end cover, wherein when in use, the outer surface of the chamfer roll supports the side surface of a casting blank and rotates along with the casting blank; the other part is an inclined surface connecting the front end of the chamfering roller with the chamfering supporting surface, which reduces the supporting action of the front end of the chamfering roller on the casting blank. Compared with the prior art, the utility model provides a sufficient roller of chamfer both can guarantee the supporting effect to the especially bight of the narrow face of casting blank, can prevent the production of the indentation that the sufficient roller front end of chamfer caused to casting blank pressure is too big simultaneously again.
Description
Technical Field
The utility model belongs to metal solidification and continuous casting field, in particular to prevent sufficient roller of chamfer of casting blank indentation production.
Background
With the development of world metallurgical technology, the modern continuous casting technology is continuously improved, the castable steel grade is continuously expanded, and some high-alloy, high-quality and high-crack sensitivity steel grades are continuously produced in the continuous casting production flow of large-scale steel enterprises. Particularly, the development of the large-section casting blank continuous casting technology increases the compression ratio of steel and improves the product quality of the steel. However, the adverse effect of the increase of the casting blank section is as follows: the casting blank needs to be bent and straightened in the casting machine, so that corner cracks of the casting blank are increased. Particularly, the thickness of a large square billet and a large rectangular billet produced by a continuous casting machine in recent years is more than 350-500 mm, and because the cooling of the corner is uneven, the stress concentration in the bending and straightening processes tends to increase the corner cracks of the casting blank.
For this reason, in addition to the optimization of the quality of molten steel and the secondary cooling technique, the metallurgical workers adopt a chamfering crystallizer technique, which makes each original right angle of a casting blank become two obtuse angles to eliminate stress concentration.
In the prior art, the crystallizer with the chamfer angle is adopted to produce the continuous casting billet with the chamfer angle, so that the corner cracks of the casting billet caused by stress concentration in the bending and straightening processes can be effectively avoided. The chamfer supporting foot roller is the equipment which is selected and can effectively support the side surface of the continuous casting billet so as to prevent the occurrence of longitudinal crack or longitudinal crack steel leakage accidents of the corner of the casting billet. For example, chinese utility model patent CN202199741U provides a novel sufficient roller for taking chamfer continuous casting billet to support, and it can be installed singly and use in the crystallizer below, also can a plurality of uses, or one or more take the novel sufficient roller of chamfer continuous casting billet support and the flat backing roll combination below use.
Because the existing support foot rollers with chamfers have good supporting functions, the supporting surfaces of the support foot rollers which are contacted with the casting blank are designed to be in the same shape as the casting blank, in practical use, the support foot rollers with chamfers are narrower than the casting blank, the greater the supporting force of the support foot rollers with chamfers on the casting blank is, namely, the better the supporting effect is, the deeper the impression caused by the sharp corner part at the front ends of the support foot rollers with chamfers on the casting blank is, and the impression can finally influence the quality of rolled products.
Disclosure of Invention
In view of the above technical problems, an object of the present invention is to provide a chamfering foot roller for preventing the occurrence of casting blank indentation, which divides the contact surface between the chamfering foot roller and the casting blank into two parts, one part is the middle supporting surface of the chamfering roller, and the shape of the middle supporting surface is the same as the shape of the side surface of the casting blank contacted with the chamfering foot roller, and the chamfering foot roller comprises a plane supporting surface and a chamfering supporting surface; the other part is an inclined plane connecting the front end of the chamfering roller with the chamfering supporting surface, which reduces the supporting action of the front end of the chamfering roller on the casting blank, reduces the supporting force and avoids the generation of indentation.
In order to achieve the above object, the present invention provides the following technical solutions:
a chamfer foot roller for preventing the indentation of a casting blank from generating comprises a chamfer roller 1, a chamfer roller supporting seat 2, a rotating shaft 3 and a fixed end cover 6; the rotating shaft 3 is arranged on the chamfering roller supporting seat 2; the two chamfering rolls 1 are respectively arranged at the left end and the right end of the rotating shaft 3 through fixed end covers 6, support the casting blank 9 and rotate together with the casting blank 9.
The contact surface of the chamfering roller 1 and the casting blank 9 is divided into the following two parts: the part is the middle supporting surface 7 of the chamfering roller 1 with the same shape as the side surface of the contacted casting blank 9, and the middle supporting surface 7 comprises a plane supporting surface and a chamfering supporting surface; the other part is an inclined plane 8 which connects the front end of the chamfering roller 1 with the chamfering support surface; the length L of the inclined plane 8 is 15-70% of the length of the middle supporting surface 7, and the maximum spacing distance H between the inclined plane 8 and the surface of the casting blank 9 is 0.5-5 mm.
A key 5 is arranged between the chamfering roller 1 and the rotating shaft 3.
A gap which is gradually widened from inside to outside is formed between the inclined surface 8 and the surface of the casting blank 9, and the shape of the inclined surface 8 on a longitudinal section along the central line of the rotating shaft 3 is a straight line or a curve, or a combination of the straight line and the curve.
The fixed end cover 6 is flat and fixed on the rotating shaft 3 by bolts 10, and the fixed end cover 6 and the chamfering roller 1 are welded and fixed.
The fixed end cover 6 is a bolt end cover 11 with an integrated structure.
Any one of the following combination modes is adopted between the rotating shaft 3 and the chamfering roller supporting seat 2: a. rolling contact is carried out by adopting a rolling bearing 4; b. adopting bearing bushes for sliding contact; c. in direct sliding contact.
An oil supply hole 12 is provided in the chamfer roller support base 2 to supply lubricating oil to the rolling bearing 4.
And a retainer ring 13 is arranged between the chamfering roller 1 and the chamfering roller support seat 2.
The chamfering foot roller is suitable for plate blanks with the thickness of 70-480 mm, and square blanks or rectangular blanks with the side length of 150-480 mm.
When in use, one group, two groups or a plurality of groups of chamfering foot rollers for preventing the casting blank from generating the indentation are arranged below the crystallizer, or one group or a plurality of groups of chamfering foot rollers for preventing the casting blank from generating the indentation are mixed with the conventional cylindrical foot rollers for use.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the utility model divides the contact surface of the chamfering foot roller and the casting blank into two parts, one part is the middle supporting surface of the chamfering roller, and the shape of the middle supporting surface is the same as that of the side surface of the casting blank contacted with the chamfering foot roller, and the middle supporting surface comprises a plane supporting surface and a chamfering supporting surface; the other part is an inclined plane connecting the front end of the chamfering roller with the chamfering supporting surface, which reduces the supporting action of the front end of the chamfering roller on the casting blank, reduces the supporting force and avoids the generation of indentation.
Drawings
FIG. 1 is a schematic view of a cross-sectional structure of a chamfer foot roller for preventing the generation of casting blank indentation;
FIG. 2 is a schematic structural view of the chamfer roll 1 in FIG. 1;
FIG. 3a is a schematic view of the connection structure of the fixed end cover 6 fixed on the rotating shaft 3 by the bolt 10;
FIG. 3b is a schematic structural diagram of the end cap bolt 11 for fixing the end cap 6 as an integral structure;
fig. 4 is a schematic structural view of the chamfer roller support seat 2 provided with an oil supply hole 12 and a sealing retainer ring 13.
Wherein the reference numerals are:
1 chamfering roll
2 chamfering roller supporting seat
3 rotating shaft
4 rolling bearing
5 key
6 fixed end cap
7 middle support surface
8 inclined plane
9 casting blank
10 bolt
11 bolt end cover of integral structure
12 oil supply hole
13 retainer ring
Length of L-shaped inclined plane 8
Maximum distance between H-slope 8 and surface of casting 19
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
As shown in FIG. 1, a chamfering foot roll for preventing the occurrence of an indentation in a cast slab. It includes: chamfer roller 1, chamfer roller supporting seat 2, rotation axis 3, bearing 4, key 5 and fixed end cover 6. In use, the outer surface of the chamfer roll 1 supports the cast strand and rotates with the cast strand 9.
The contact surface of the chamfering roll 1 and the casting blank 9 is divided into two parts, one part is a middle supporting surface 7 of the chamfering roll 1, the shape of the middle supporting surface is the same as that of the side surface of the casting blank contacted with the chamfering roll, and the middle supporting surface comprises a plane supporting surface and a chamfering supporting surface; the other part is a bevel 8 which connects the front end of the chamfering roller 1 with a chamfering support surface and slows down the supporting action of the front end of the chamfering roller 1 on the casting blank. Compared with the prior art, the utility model provides a sufficient roller of chamfer both can guarantee the supporting effect to the especially bight of the narrow face of casting blank, can prevent the production of the indentation that the sufficient roller front end of chamfer caused to casting blank pressure is too big simultaneously again.
In order to ensure the use effect of the chamfering foot roller, in the actual design, the length L of the inclined surface 8 at the front end of the chamfering roller 1 is designed to be 5-55 mm, and the height difference H between the inclined surface 8 at the front end of the chamfering roller 1 and the actual casting blank shape is designed to be 0.5-5 mm, as shown in figure 2.
A gap gradually widening from inside to outside is formed between a bevel 8 at the front end of the chamfering roll 1 and a casting block 9, and the shape of the bevel 8 on a longitudinal section along the center line of the rotating shaft 3 may be a straight line, various curves, or a combination of a straight line and various curves.
A chamfer foot roller for preventing the generation of casting blank indentation is characterized in that a fixed end cover 6 can be flat and fixed on a rotating shaft 3 by bolts 10, and the fixed end cover 6 is welded with a chamfer roller 1 to prevent the chamfer roller 1 from falling off. The fixed end cap 6 may also be a bolt end cap 11 of unitary construction, see fig. 3.
In the chamfering foot roller, the combination method between the rotating shaft 3 and the chamfering roller supporting seat 2 can be any one of the following modes: 1) rolling contact is carried out by adopting a rolling bearing 4; 2) adopting bearing bushes for sliding contact; 3) in direct sliding contact.
In order to prolong the service life of the chamfering foot roller, an oil supply hole 12 may be provided in the chamfering roller support base 2 to supply lubricating oil to the bearing 4, as shown in fig. 4. A retainer ring 13 may also be provided between the chamfering roll 1 and the chamfering roll supporting base 2 to prevent oil leakage.
The chamfering foot roller can be suitable for plate blanks with the thickness of 70-480 mm, and also can be suitable for square blanks or rectangular blanks with the side length of 150-480 mm; in actual use, one, two or more groups of chamfering foot rollers for preventing the casting blank from being indented can be adopted below the crystallizer, and one or more groups of chamfering foot rollers for preventing the casting blank from being indented can also be mixed with the conventional cylindrical foot rollers for use.
Claims (10)
1. A chamfering foot roller for preventing the indentation of a casting blank from generating comprises a chamfering roller (1), a chamfering roller supporting seat (2), a rotating shaft (3) and a fixed end cover (6); the rotating shaft (3) is arranged on the chamfering roller supporting seat (2); two chamfer rolls (1) set up tip about rotation axis (3) through fixed end cover (6) respectively, support casting blank (9) to rotate its characterized in that along with casting blank (9):
the contact surface of the chamfering roll (1) and the casting blank (9) is divided into the following two parts: the part of the middle supporting surface (7) is the chamfer supporting surface (1) with the same shape as the side surface of the contacted casting blank (9), and the middle supporting surface (7) comprises a plane supporting surface and a chamfer supporting surface; the other part is an inclined plane (8) which connects the front end of the chamfering roller (1) with the chamfering support surface; the length L of the inclined plane (8) is 15-70% of the length of the middle supporting surface (7), and the maximum spacing distance H between the inclined plane (8) and the surface of the casting blank (9) is 0.5-5 mm.
2. The chamfer foot roll for preventing the generation of the casting blank indentation according to claim 1, wherein: a key (5) is arranged between the chamfering roller (1) and the rotating shaft (3).
3. The chamfer foot roll for preventing the generation of the casting blank indentation according to claim 1, wherein: a gap gradually widening from inside to outside is formed between the inclined surface (8) and the surface of the casting blank (9), and the shape of the inclined surface (8) on a longitudinal section along the central line of the rotating shaft (3) is a straight line or a curve or a combination of the straight line and the curve.
4. The chamfer foot roll for preventing the generation of the casting blank indentation according to claim 1, wherein: the fixed end cover (6) is flat and is fixed on the rotating shaft (3) by bolts (10), and the fixed end cover (6) and the chamfering roller (1) are fixed by welding.
5. The chamfer foot roll for preventing the generation of the casting blank indentation according to claim 1, wherein: the fixed end cover (6) is a bolt end cover (11) of an integrated structure.
6. The chamfer foot roll for preventing the generation of the casting blank indentation according to claim 1, wherein: any one of the following combination modes is adopted between the rotating shaft (3) and the chamfering roller supporting seat (2): a. rolling contact is carried out by adopting a rolling bearing (4); b. adopting bearing bushes for sliding contact; c. in direct sliding contact.
7. The chamfering foot roll for preventing the generation of the casting blank indentation according to claim 6, wherein: and an oil supply hole (12) is formed in the chamfer roller supporting seat (2) and supplies lubricating oil to the rolling bearing (4).
8. The chamfer foot roll for preventing the generation of the casting blank indentation according to claim 7, wherein: and a check ring (13) is arranged between the chamfering roller (1) and the chamfering roller supporting seat (2).
9. The chamfer foot roll for preventing the occurrence of casting blank indentation according to any one of claims 1 to 8, wherein: the chamfering foot roller is suitable for plate blanks with the thickness of 70-480 mm, and square blanks or rectangular blanks with the side length of 150-480 mm.
10. The chamfer foot roll for preventing the occurrence of casting blank indentation according to any one of claims 1 to 8, wherein: when in use, one group, two groups or a plurality of groups of chamfering foot rollers for preventing the casting blank from generating the indentation are arranged below the crystallizer, or one group or a plurality of groups of chamfering foot rollers for preventing the casting blank from generating the indentation are mixed with the conventional cylindrical foot rollers for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021543938.5U CN213162984U (en) | 2020-07-30 | 2020-07-30 | Chamfer foot roller for preventing casting blank indentation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021543938.5U CN213162984U (en) | 2020-07-30 | 2020-07-30 | Chamfer foot roller for preventing casting blank indentation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213162984U true CN213162984U (en) | 2021-05-11 |
Family
ID=75796798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021543938.5U Expired - Fee Related CN213162984U (en) | 2020-07-30 | 2020-07-30 | Chamfer foot roller for preventing casting blank indentation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213162984U (en) |
-
2020
- 2020-07-30 CN CN202021543938.5U patent/CN213162984U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210511 |