CN219112509U - Improved hot-rolled railway fishplate die steel finished product roller - Google Patents
Improved hot-rolled railway fishplate die steel finished product roller Download PDFInfo
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- CN219112509U CN219112509U CN202223471198.0U CN202223471198U CN219112509U CN 219112509 U CN219112509 U CN 219112509U CN 202223471198 U CN202223471198 U CN 202223471198U CN 219112509 U CN219112509 U CN 219112509U
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- roller
- annular concave
- concave cavity
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 21
- 239000010959 steel Substances 0.000 title claims abstract description 21
- 230000000712 assembly Effects 0.000 claims abstract description 24
- 238000000429 assembly Methods 0.000 claims abstract description 24
- 238000005098 hot rolling Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 238000005096 rolling process Methods 0.000 description 10
- 229910001563 bainite Inorganic materials 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 229910001018 Cast iron Inorganic materials 0.000 description 3
- 229910001141 Ductile iron Inorganic materials 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- OGSYQYXYGXIQFH-UHFFFAOYSA-N chromium molybdenum nickel Chemical compound [Cr].[Ni].[Mo] OGSYQYXYGXIQFH-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- DDTIGTPWGISMKL-UHFFFAOYSA-N molybdenum nickel Chemical compound [Ni].[Mo] DDTIGTPWGISMKL-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Abstract
The utility model relates to an improved hot-rolled railway fishplate die steel finished product roller, which comprises an upper roller and a lower roller, wherein one or more groups of first annular concave cavity assemblies are arranged on the end surface of the upper roller along the length direction; one or more groups of second annular concave cavity assemblies are arranged on the end face of the lower roller along the length direction, the first annular concave cavity assemblies and the second annular concave cavity assemblies are arranged oppositely, and the first annular concave cavity assemblies and the second annular concave cavity assemblies are spliced to form a cross section of the fishplate; the first annular concave cavity assembly comprises a first groove, a first connecting section and a second groove; the second annular concave cavity assembly comprises a third groove, a second connecting section and a fourth groove. Compared with the traditional roller, the yield of the finished roller of the die steel for the hot rolled railway fishplate can be increased by more than 80%, the precision and the brightness of the rolled product are greatly improved, the service life of the roller is prolonged, the production cost is reduced, and better economic benefit and social benefit are improved.
Description
Technical Field
The utility model relates to the technical field of rollers, in particular to an improved hot-rolled railway fishplate die steel finished product roller.
Background
After the new century, the development and construction of various industries in China are fast and stable, and the urban rail transit, the subway and the expressway are more gradually changed. The rail joints for constructing the rails are widely used as railway fishplates, namely rail joint clamping plates, commonly called rail clamping plates, namely super-connection function at the rail joints, and are divided into light rails, heavy rails and lifting rails, and are fasteners for connection function between the rails. Because of construction acceleration, the market demand for fishplates is increasing. Because the environment in which the fishplate is used is special, the standard requirements for the fishplate are very strict, and not only high strength and high rigidity, but also high precision and smooth surface quality are required. The roller materials commonly adopted by the steel rabbet finished product rack for rolling the fishplate at present are mainly bainite ductile iron and high nickel molybdenum infinite chilled cast iron. Because the shape of the fishplate is special, the rolling hole shape is deep and complex, grid-shaped hot cracks often occur, and the phenomenon of peeling off the blocks at the wheel corners of the head, the tail and the waist of the fishplate can also occur in infinite chilled cast iron; especially in the deep washing area of head and tail, because the load is big during the rolling, cause the roll breakage phenomenon when the rolled piece warp, often make the roll inefficacy in advance, intangibly increased the manufacturing cost of enterprise.
Disclosure of Invention
The utility model aims to solve the technical problems that: in order to solve the problems in the background technology, the improved hot rolling railway fishplate die steel finished product roller is provided, compared with the traditional roller, the yield can be increased by more than 80%, the precision and the brightness of a rolled product are greatly improved, the service life of the roller is prolonged, the production cost is reduced, and better economic benefit and social benefit are improved.
The technical scheme adopted for solving the technical problems is as follows: the improved finished product roller for hot rolling the die steel of the railway fishplate comprises an upper roller and a lower roller, wherein one or more groups of first annular concave cavity assemblies are arranged on the end surface of the upper roller along the length direction; one or more groups of second annular concave cavity assemblies are arranged on the end face of the lower roller along the length direction, the first annular concave cavity assemblies and the second annular concave cavity assemblies are arranged oppositely, and the first annular concave cavity assemblies and the second annular concave cavity assemblies are spliced to form a cross section of the fishplate; the first annular concave cavity assembly comprises a first groove, a first connecting section and a second groove; the first groove is connected with the second groove through a first connecting section; the second annular concave cavity assembly comprises a third groove, a second connecting section and a fourth groove; the third groove is connected with the fourth groove through a second connecting section; the first groove and the third groove are oppositely arranged, and the first groove and the third groove are spliced to form the tail part of the fishplate; the first connecting section and the second connecting section are spliced to form a waist of the fishplate; the second groove and the fourth groove are oppositely arranged, and the second groove and the fourth groove are spliced to form the head part of the fishplate.
Further, in the above technical scheme, the two ends of the upper roller are provided with bearing blocks, and one side of each bearing block is provided with a transmission end.
Further, in the above technical scheme, the two ends of the lower roller are provided with bearing blocks, and one side of each bearing block is provided with a transmission end.
Further, in the above technical scheme, the diameter of the upper roller and the diameter of the lower roller are both 800-900mm.
Further, in the above technical scheme, the length of the upper roller and the length of the lower roller are both 1500-2000mm.
Further, in the above technical scheme, the connection parts of the bearing blocks and the upper roller or the lower roller are provided with the first round corners.
Further, in the above technical scheme, the connection part of the bearing block and the driving end is provided with the second round angle.
The beneficial effects of the utility model are as follows: compared with the traditional roller, the yield of the improved hot-rolled railway fishplate die steel finished roller can be increased by more than 80%, the precision and the brightness of a rolled product are greatly improved, the service life of the roller is prolonged, the production cost is reduced, and better economic and social benefits are improved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the present utility model;
fig. 2 is a schematic cross-sectional structure of the fishplate.
The reference numerals in the drawings are: 1. the upper roller, 2, the lower roller, 3, the fishplate, 4, first recess, 5, first linkage segment, 6, second recess, 7, third recess, 8, second linkage segment, 9, fourth recess, 10, afterbody, 11, waist, 12, head, 13, bearing rail, 14, driving end, 15, first fillet, 16, second fillet.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
In the application, the light rail fishplate model numbers are 8KG, 9KG, 12KG, 15KG, 18KG, 22KG and 24KG; the heavy rail fishplate is 43KG, 50KG, 60KG and 75KG.
Referring to fig. 1 and 2, an improved hot-rolled railway fishplate die steel finished product roller comprises an upper roller 1 and a lower roller 2, wherein one or more groups of first annular concave cavity assemblies are arranged on the end surface of the upper roller 1 along the length direction; one or more groups of second annular concave cavity assemblies are arranged on the end face of the lower roller 2 along the length direction, the first annular concave cavity assemblies are arranged opposite to the second annular concave cavity assemblies, and the first annular concave cavity assemblies and the second annular concave cavity assemblies are spliced to form the cross section of the fishplate 3; the first annular cavity assembly comprises a first groove 4, a first connecting section 5 and a second groove 6; the first groove 4 and the second groove 6 are connected through a first connecting section 5; the second annular cavity assembly comprises a third groove 7, a second connecting section 8 and a fourth groove 9; the third groove 7 is connected with the fourth groove 9 through the second connecting section 8; the first groove 4 and the third groove 7 are arranged opposite to each other, and the first groove 4 and the third groove 7 are spliced to form the tail 10 of the fishplate 3; the first connecting section 5 and the second connecting section 8 are spliced to form the waist 11 of the fishplate 3; the second groove 6 is opposite to the fourth groove 9, and the second groove 6 and the fourth groove 9 are spliced to form the head 12 of the fishplate 3.
Wherein, both ends of the upper roller 1 are provided with bearing blocks 13, and one side of the bearing block 13 is provided with a driving end 14. The two ends of the lower roller 2 are provided with bearing blocks 13, and one side of the bearing block 13 is provided with a driving end 14. The diameter of the upper roller 1 and the diameter of the lower roller 2 are both 800-900mm. The length of the upper roller 1 and the length of the lower roller 2 are both 1500-2000mm. The connection part of the bearing block 13 and the upper roller 1 or the lower roller 2 is provided with a first round angle 15. The connection part of the bearing block 13 and the driving end 14 is provided with a second round angle 16.
The production process of the improved hot-rolled railway fishplate die steel finished product roller comprises the following steps: 1. reasonable chemical components are selected: c:0.40% -0.60%, si:0.50% -0.70%, mn:0.30% -0.60%, P is less than or equal to 0.03%, S is less than or equal to 0.025%, cr:1.50% -2.50%, ni:1.00% -2.00%, mo:0.80% -1.20%, V:0.30% -0.50%, nb:0.40% = 0.60%; 2. special heat treatment: the roller blank is opened at 550-650 ℃ and is put into a resistance furnace with the same temperature for constant temperature for 2-4 hours; diffusion annealing, heating to 680 ℃ at a speed of 10 ℃/h, preserving heat for 8-12 hours, and then furnace cooling; normalizing, wherein the roller temperature is increased to 450-480 ℃, the heating speed is 15 ℃/h, and the roller temperature is increased to 660-680 ℃; heat preservation is carried out for 8-10 hours, then the temperature is raised, the temperature raising speed is 15-20 ℃, the roller temperature is 940-960 ℃, and the heat preservation time is 25 mm/hour; then spraying and quenching with water mist; tempering: feeding the steel into a furnace for tempering at the temperature of between 450 ℃ and 530 ℃ to 580 ℃ at the heating speed of 10 ℃/h; heat preservation is carried out for 6 hours, and furnace cooling is carried out; and discharging the roller after the roller temperature reaches 100 ℃.
The hardness of the roller surface is 68-72HSD, and the hardness uniformity is more than or equal to 1.5HSD; the hardness drop of the roll surface to the groove bottom of the hole pattern is more than or equal to 1.5HSD; the tensile strength of the roller is more than or equal to 650HSD; the metallographic basic structure of the roller is Li Zhuang carbide, tempered sorbite, bainite and a small amount of martensite.
The finished product roller of the improved hot-rolled railway fishplate die steel is increased by more than 80% in trial rolling yield than a bainite ductile iron high nickel-chromium-molybdenum infinite chilled roller, and the rolling time of the roller is more than 1000 tons per time in the front and rear stages of single rolling, so that the on-machine service period of the roller is prolonged, and better economic benefit and social benefit are obtained.
The improved hot rolling railway fishplate die steel finished product roller surrounds a complex rolling hole pattern of a railway fishplate, has high required rolling precision, breaks through the low-temperature rolling operation environment adopted for meeting the surface smoothness requirement of a rolled piece, has the head and tail abrasion resistance and the heat cracking resistance of a deep hole, ensures that the roller hardness has red hardness, has no hardness drop basically on a working layer, has excellent heat shock extrusion toughness, improves the hole pattern oxidation resistance under the environment that a high-pressure rolled piece passes through the hole pattern and a water circulation cooling roller temperature, and is not easy to generate accidents of hot cracks, peeling off and blocking, and even breaking the roller. The comprehensive performance of the high nickel chromium molybdenum infinite chilled cast iron roller is superior to that of the bainite ductile iron, the problem of the roller is solved, and a foundation is laid for providing operation efficiency, benefit and product quality for rolling enterprises.
The foregoing description is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical solution of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.
Claims (7)
1. An improved hot rolling railway fishplate die steel finished product roller is characterized in that: the device comprises an upper roller and a lower roller, wherein one or more groups of first annular concave cavity assemblies are arranged on the end surface of the upper roller along the length direction; one or more groups of second annular concave cavity assemblies are arranged on the end face of the lower roller along the length direction, the first annular concave cavity assemblies and the second annular concave cavity assemblies are arranged oppositely, and the first annular concave cavity assemblies and the second annular concave cavity assemblies are spliced to form a cross section of the fishplate; the first annular concave cavity assembly comprises a first groove, a first connecting section and a second groove; the first groove is connected with the second groove through a first connecting section; the second annular concave cavity assembly comprises a third groove, a second connecting section and a fourth groove; the third groove is connected with the fourth groove through a second connecting section; the first groove and the third groove are oppositely arranged, and the first groove and the third groove are spliced to form the tail part of the fishplate; the first connecting section and the second connecting section are spliced to form a waist of the fishplate; the second groove and the fourth groove are oppositely arranged, and the second groove and the fourth groove are spliced to form the head part of the fishplate.
2. An improved hot rolled railroad fishplate die steel finished roll as claimed in claim 1, wherein: the upper roller both ends all set up the bearing shelves, one side of bearing shelves set up the driving end.
3. An improved hot rolled railroad fishplate die steel finished roll as claimed in claim 1, wherein: the lower roller both ends all set up the bearing shelves, one side of bearing shelves set up the driving end.
4. An improved hot rolled railroad fishplate die steel finished roll as claimed in claim 1, wherein: the diameter of the upper roller and the diameter of the lower roller are both 800-900mm.
5. An improved hot rolled railroad fishplate die steel finished roll as claimed in claim 1, wherein: the length of the upper roller and the length of the lower roller are both 1500-2000mm.
6. An improved hot rolled railroad fishplate die steel finished roll as claimed in claim 2 or 3, characterized by: the first round corners are arranged at the joints of the bearing blocks and the upper roller or the lower roller.
7. An improved hot rolled railroad fishplate die steel finished roll as claimed in claim 2 or 3, characterized by: the connection part of the bearing block and the driving end is provided with a second round angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223471198.0U CN219112509U (en) | 2022-12-24 | 2022-12-24 | Improved hot-rolled railway fishplate die steel finished product roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223471198.0U CN219112509U (en) | 2022-12-24 | 2022-12-24 | Improved hot-rolled railway fishplate die steel finished product roller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219112509U true CN219112509U (en) | 2023-06-02 |
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ID=86523762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223471198.0U Active CN219112509U (en) | 2022-12-24 | 2022-12-24 | Improved hot-rolled railway fishplate die steel finished product roller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219112509U (en) |
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2022
- 2022-12-24 CN CN202223471198.0U patent/CN219112509U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: An improved hot-rolled railway fishtail plate mold steel finished rolling mill Granted publication date: 20230602 Pledgee: Agricultural Bank of China Limited by Share Ltd. Changzhou Wujin branch Pledgor: Jiangsu Hongwei Roll Co.,Ltd. Registration number: Y2024980036369 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |