CN216838112U - Forging quenching wind box for forging and pressing AT rail type steel rail heel end - Google Patents
Forging quenching wind box for forging and pressing AT rail type steel rail heel end Download PDFInfo
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- CN216838112U CN216838112U CN202123036340.4U CN202123036340U CN216838112U CN 216838112 U CN216838112 U CN 216838112U CN 202123036340 U CN202123036340 U CN 202123036340U CN 216838112 U CN216838112 U CN 216838112U
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Abstract
The utility model discloses a forging and pressing quenching wind box for forging and pressing AT rail type rail is followed end relates to track technical field, including installation frame, top surface wind box, connection bent plate, side wind box and wide angle nozzle, the utility model discloses simple structure, through the installation angle that sets up side wind box, the angle of wide angle nozzle and the mounting means of wide angle nozzle, the workpiece surface who makes can cover wide angle nozzle spun wind completely, and two wide angle nozzle spun winds do not produce the convection current, makes 60AT heat treatment rail forging and pressing on line follow end position rail top surface hardness, cross section hardness, mechanical properties, each item performance survey all accord with TB/T2344.3-2018 standard requirement with the end.
Description
Technical Field
The utility model belongs to the technical field of the track, a forging and pressing quenching wind box for forging and pressing AT rail type rail heel end is related to.
Background
The heat treatment process of the steel rail comprises two process modes of off-line rail head heat treatment and on-line rail head heat treatment, wherein the off-line rail head heat treatment is to heat the steel rail head to austenitizing temperature again and then adopt compressed air for cooling and quenching. The process mostly adopts electric induction heating, so that the energy consumption is high, and the equipment loss is strong; the on-line railhead heat treatment is to use the waste heat after rolling the steel rail to quench the railhead, and the on-line railhead heat treatment process has the characteristics of high production efficiency, low production cost and good comprehensive quality, and the railhead hardness is uniformly distributed, the depth of a hardening layer can reach more than 35mm, and the whole steel rail can be strengthened.
The hardness of the top surface of the 3.11 special-shaped steel rail in the special-shaped steel rail TB/T2344.3-2018 meets the requirements of the table 4. The specifications require that U75V on-line heat treat the hardness of the top rail surface of a steel rail: the hardness of the forged part (without the S area) should reach 340-420 HBW, the hardness of the heat affected area part (with the S area) is more than or equal to 260HBW, and the hardness of 5 measuring points (with the measuring point spacing of 10 mm) is allowed to be lower than 340HB at most.
In order to ensure that the process research can meet the standard requirements, the forging quenching wind box is designed, and the structural form and the arrangement form of the nozzle are optimized.
Disclosure of Invention
An object of the utility model is to provide a forging and pressing quenching wind box for forging and pressing AT rail type rail heel end to solve the problem that exists among the prior art.
The utility model provides a forging and pressing quenching wind box for forging and pressing AT rail type rail with end, includes the installation frame, the top surface wind box is installed to the bottom of installation frame, the side wind box is all installed through connecting the bent plate to two lateral walls of installation frame, the equipartition is equipped with wide angle nozzle on top surface wind box and the side wind box, connect the bent plate by vertical board and horizontal plate integrated into one piece, and be 85-87 settings between vertical board and the horizontal plate.
Preferably, one row of wide angle nozzle diameter is 3mm in the middle of the top surface wind box, and the quantity is 28, and the diameter of other nozzles is 2.5mm, and quantity is 110, the wide angle nozzle of side wind box arranges as follows:
the heel end forming section of the workpiece is in a 585mm range, a row of wide-angle nozzles are arranged at the bottom of the side wind box, the diameter of each wide-angle nozzle is 2.5mm, and the number of the wide-angle nozzles is 15;
two rows of wide-angle nozzles are arranged at the bottom of the side air box within the range of 180mm of the transition section of the workpiece, the diameter of each wide-angle nozzle is 2.5mm, and the number of the wide-angle nozzles is 9;
within 535mm of the heat affected section of the workpiece, three rows of wide-angle nozzles are arranged at the bottom of the side wind box, the aperture of each wide-angle nozzle is 2.5mm, and the number of the wide-angle nozzles is 41.
Preferably, the nozzle depth of the wide-angle nozzle is 4mm, and the angle of the wide-angle nozzle is 40 degrees.
Preferably, the distance L between two adjacent wide-angle nozzles is 30mm, and the range of the height H5 between the wide-angle nozzles and the surface of the workpiece is 70-95 mm.
The utility model has the advantages that: the structure is simple, the surface of a workpiece can completely cover the air sprayed by the wide-angle nozzle by setting the installation angle of the side air box, the angle of the wide-angle nozzle and the installation mode of the wide-angle nozzle, and the air sprayed by the two wide-angle nozzles does not generate convection, so that the hardness, the cross section hardness, the mechanical property and various performance tests of the 60AT on-line heat treatment of the rail top surface of the forging and pressing heel part of the steel rail all meet the TB/T2344.3-2018 standard requirements.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the middle connection bending plate of the present invention.
Fig. 3 is a bottom view of the top surface wind box of the present invention.
Fig. 4 is a front sectional view of the medium wide angle nozzle of the present invention.
Fig. 5 is a schematic structural diagram of a workpiece according to the present invention.
Fig. 6 is a schematic view between a medium wide-angle nozzle and a workpiece according to the present invention.
The labels in the figures are: 1-mounting frame, 2-top surface wind box, 3-connecting bent plate, 31-vertical plate, 32-horizontal plate, 4-side wind box, 5-workpiece, H1-heel end forming section, H2-transition section, H3-raw material section, 6-wide angle nozzle, and H4-nozzle depth.
Detailed Description
The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings for a more complete, accurate and thorough understanding of the inventive concept and technical solutions of the present invention by those skilled in the art.
As shown in fig. 1-6, the utility model discloses a forging quenching wind box for forging and pressing AT rail type rail with end, including installation frame 1, top surface wind box 2 is installed to the bottom of installation frame 1, side wind box 4 is all installed through connecting bent plate 3 to two lateral walls of installation frame 1, the equipartition is equipped with wide angle nozzle 6 on top surface wind box 2 and the side wind box 4, connect bent plate 3 by vertical board 31 and horizontal plate 32 integrated into one piece, and be 85-87 settings between vertical board 31 and the horizontal plate 32.
In this embodiment, the diameter of the wide-angle nozzle 6 in the middle of the top wind box 2 is 3mm, the number is 28, the diameters of the other nozzles are 2.5mm, the number is 110, the workpiece 5 comprises a heel end forming section H1, a transition section H2 and a heat affected section H3, the length of the heel end forming section H1 is 585mm, the length of the transition section H2 is 180mm, the length of the heat affected section H3 is 535mm, and the wide-angle nozzles 6 of the side wind box 4 are arranged as follows:
in the heel end forming section H1 of the workpiece 5, the bottom of the crosswind box 4 is provided with a row of wide-angle nozzles 6, the diameter of each wide-angle nozzle 6 is 2.5mm, and the number of the wide-angle nozzles is 15;
in a transition section H2 of a workpiece 5, the bottom of a side wind box 4 is provided with two rows of wide-angle nozzles 6, the diameter of each wide-angle nozzle 6 is 2.5mm, and the number of the wide-angle nozzles is 9;
in the heat affected section H3 of work piece 5, three rows of wide-angle nozzles 6 are arranged at the bottom of side wind box 4, the aperture of each wide-angle nozzle 6 is 2.5mm, and the number of the wide-angle nozzles is 41.
In the present embodiment, the nozzle depth H4 of the wide-angle nozzle 6 is 4mm, and the angle of the wide-angle nozzle 6 is 40 °.
In this embodiment, the interval L between two adjacent wide-angle nozzles is 30mm, the range of height H5 between wide-angle nozzle and the workpiece surface is 70~95mm, can be covered by nozzle spun wind completely for guaranteeing workpiece surface, and two nozzle spun wind do not produce the convection current, calculates according to the condition of complete theory, and the nozzle interval L, should satisfy following computational formula between the angle theta of wide-angle nozzle and the straight-line distance H of nozzle apart from the work piece:
converting the above equation, the calculation formula of the angle θ of the wide-angle nozzle is as follows:
the following table lists the theta angles at different values, based on different values of L and H:
in actual working conditions, factors such as viscosity of high-pressure air are considered, and the actually required theta angle is slightly larger than a theoretical calculated value by 3-5 degrees. Meanwhile, in order to avoid the convection of the high-pressure air flow ejected from the two nozzles at the junction, the angle θ should not be too large. So in the actual determination of the nozzle angle, the nozzle angle theta should be chosen to be slightly greater than the theoretical value by 5 deg..
And combining the actual working conditions in a factory, and the range of the height H value of the air cooling equipment from the rail head of the workpiece after the normalizing of the forging press is about 70-95 mm. According to the design size of the existing wind box, the distance L =30mm between the two nozzles, and the angle theta of the wide-angle nozzle is 25-33 degrees.
The utility model discloses simple structure, through the installation angle that sets up side wind box 4, the angle of wide angle nozzle 6 and the mounting means of wide angle nozzle 6, 5 surfaces of work piece that make can cover 6 spun winds of wide angle nozzle completely, and 6 spun winds of two wide angle nozzles do not produce the convection current, make 60AT heat treatment rail forging and pressing follow end position rail top surface hardness on line, cross section hardness, mechanical properties, each item performance survey all accord with TB/T2344.3-2018 standard requirement.
The present invention has been described in detail with reference to the accompanying drawings, and it is apparent that the present invention is not limited by the above embodiments, and various insubstantial modifications of the inventive concept and technical solutions of the present invention or direct application of the inventive concept and technical solutions to other applications without modification are within the scope of the present invention.
Claims (4)
1. The utility model provides a forging and pressing quenching wind box for forging and pressing AT rail type steel rail heel end which characterized in that: including installation frame (1), top surface wind box (2) are installed to the bottom of installation frame (1), side wind box (4) are all installed through connecting bent plate (3) to two lateral walls of installation frame (1), the equipartition is equipped with wide angle nozzle (6) on top surface wind box (2) and side wind box (4), connect bent plate (3) by vertical board (31) and horizontal plate (32) integrated into one piece, and be 85-87 setting between vertical board (31) and horizontal plate (32).
2. The forging quenching wind box for forging the heel end of the AT rail type steel rail as claimed in claim 1, wherein: one row of wide angle nozzle (6) diameter is 3mm in the middle of top surface wind box (2), and quantity is 28, and remaining nozzle diameter is 2.5mm, and quantity is 110, wide angle nozzle (6) of side wind box (4) are arranged as follows:
in a heel end forming section (H1) of a workpiece (5), a row of wide-angle nozzles (6) are arranged at the bottom of a side wind box (4), the diameter of each wide-angle nozzle (6) is 2.5mm, and the number of the wide-angle nozzles is 15;
in a transition section (H2) of a workpiece (5), two rows of wide-angle nozzles (6) are arranged at the bottom of a side air box (4), the diameter of each wide-angle nozzle (6) is 2.5mm, and the number of the wide-angle nozzles is 9;
in a heat affected section (H3) of the workpiece (5), three rows of wide-angle nozzles (6) are arranged at the bottom of the side air box (4), and the number of the wide-angle nozzles (6) is 41, wherein the aperture of each wide-angle nozzle (6) is 2.5 mm.
3. The forging quenching wind box for forging the heel end of the AT rail type steel rail as claimed in claim 2, wherein: the nozzle depth (H4) of the wide-angle nozzle (6) is 4mm, and the angle of the wide-angle nozzle (6) is 40 degrees.
4. The forging quenching wind box for forging the heel end of the AT rail type steel rail as claimed in claim 3, wherein: the interval between two adjacent wide angle nozzle (6) is 30mm, the high range between wide angle nozzle (6) and work piece (5) surface is 70~95 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123036340.4U CN216838112U (en) | 2021-12-06 | 2021-12-06 | Forging quenching wind box for forging and pressing AT rail type steel rail heel end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123036340.4U CN216838112U (en) | 2021-12-06 | 2021-12-06 | Forging quenching wind box for forging and pressing AT rail type steel rail heel end |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216838112U true CN216838112U (en) | 2022-06-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123036340.4U Active CN216838112U (en) | 2021-12-06 | 2021-12-06 | Forging quenching wind box for forging and pressing AT rail type steel rail heel end |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216838112U (en) |
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2021
- 2021-12-06 CN CN202123036340.4U patent/CN216838112U/en active Active
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