A forging and quenching device for forging the tail end of AT rail section

Abstract

The application discloses a forging and quenching device for forging and pressing a rail tail end of an AT rail type steel rail, relates to the technical field of rail manufacturing, and comprises a conveying mechanism, a centering mechanism and an air cooling mechanism. The conveying mechanism is used for conveying the T steel rail after rolling or cooling. The conveying mechanism comprises a supporting plate, a supporting strip, a fixing plate, a motor, a supporting pipe and a supporting block. The centering mechanism is arranged above the conveying mechanism and is used for centrally aligning the rail head part of the conveyed T steel rail. The centering mechanism comprises an expanding plate, a mounting rod, a centering strip, a connecting plate one and a hydraulic cylinder one. The air cooling mechanism is arranged above the centering mechanism and is used for rapidly cooling the rail head part of the centered T steel rail. The air cooling mechanism comprises a connecting pipe, a connecting plate two, a hydraulic cylinder two, a top air box and a side air box. The application can first accurately position the rail head part of the AT steel rail directly below the air cooling mechanism and then perform a quenching process, so that the hardness distribution uniformity of the working area of the AT steel rail is effectively ensured.

Description

Technical Field

[0001] This invention relates to the technical field of rail manufacturing, and specifically to a forging and quenching device for forging the heel end of AT rail type steel rails. Background Technology

[0002] Rail heat treatment processes are divided into two types: offline railhead heat treatment and online railhead heat treatment. Offline railhead heat treatment involves reheating the railhead to its austenitizing temperature and then quenching it with compressed air. This process mostly uses induction heating, which consumes a lot of energy and causes significant equipment wear. Online railhead heat treatment utilizes the residual heat from rail rolling for railhead quenching. Online heat treatment offers advantages such as high production efficiency, low production cost, and good overall quality. Furthermore, it results in uniform hardness distribution in the railhead, with a hardened layer depth exceeding 35mm, thus strengthening the entire rail.

[0003] According to the standard TB / T2344.3-2018 "Special-shaped Rails", section 3.11 states that the hardness of the top surface of special-shaped rails should meet the requirements of Table 4. The specification requires that the hardness of the top surface of U75V online heat-treated rails be: 340–420 HBW for the forged portion (excluding the S-zone), and ≥260 HBW for the heat-affected zone (including the S-zone). A maximum of five measuring points (10mm apart) are allowed to have a hardness below 340 HBW.

[0004] To ensure that this process research can meet the above-mentioned standard requirements, a forging and quenching device was designed. This device can accurately position the rail head of the AT rail directly below the air-cooling mechanism before performing the quenching process, effectively ensuring the uniformity of hardness distribution in the working area of ​​the AT rail. Summary of the Invention

[0005] The purpose of this invention is to provide a forging and quenching device for forging the heel end of AT rail type steel rails, so as to solve the above-mentioned defects caused by the prior art.

[0006] A forging and quenching device for forging the heel end of a T-shaped rail includes a conveying mechanism, a centering mechanism, and an air-cooling mechanism, wherein:

[0007] The conveying mechanism is used to transport the rolled or cooled T-rails.

[0008] The centering mechanism is located above the conveying mechanism and is used to center and align the rail head of the conveyed T-rail.

[0009] The air-cooling mechanism is located above the centering mechanism and is used to rapidly cool the rail head portion of the T-rail after centering.

[0010] Preferably, the conveying mechanism includes a support plate, support bars, a fixed plate, a motor, support pipes, and support blocks. The support plate is horizontally arranged. A pair of support bars are symmetrically connected to the upper side of the support plate. A conveying roller is evenly rotatably connected between the two support bars. Both ends of the conveying roller are keyed to pulleys. The pulleys on the same side are connected by a transmission belt. Two pairs of fixed plates are symmetrically connected to the front and rear sides of the support plate. Two pairs of motors are correspondingly connected to the outer sides of the two pairs of support plates. The output shafts of the pair of motors on the same side are coaxially connected to the two ends of the outermost conveying roller through a pair of couplings. Six support pipes are distributed and connected to the lower side of the support plate. Six support blocks are correspondingly connected to the lower ends of each support pipe.

[0011] Preferably, the centering mechanism includes an extension plate, a mounting rod, a centering strip, a connecting plate, and a hydraulic cylinder. The extension plate has a pair of plates symmetrically connected to the ends of two support strips. A mounting rod is provided between the two extension plates on the same side. The two ends of the mounting rod are connected to the inner side of the extension plate through a pair of flange seats. A pair of sliding blocks are slidably connected to the mounting rod. A sliding column is vertically fixed to the outer side of the sliding block. A "┴"-shaped mounting plate is vertically installed on the upper side of the sliding block. The centering strip has a pair of plates symmetrically distributed on the left and right. The two ends of the centering strip are correspondingly connected to the upper part of the two mounting plates on the same side. Steam turbines are evenly connected to the inner wall of the centering strip. The connecting plate has a pair of plates symmetrically connected to the lower side of the support plate. The hydraulic cylinder has a pair of plates correspondingly connected to the lower side of the two connecting plates. The piston rod end of the hydraulic cylinder is connected to a hinge seat. A pair of hinge strips are symmetrically hinged on the left and right sides of the hinge seat. The upper end of the hinge strip on the same side is hinged to the outer end of the sliding column.

[0012] Preferably, the air-cooling mechanism includes connecting pipes, a second connecting plate, a second hydraulic cylinder, a top air box, and a side air box. The connecting pipes are provided with four pipes and are distributed and connected to the upper side of the support plate. The second connecting plate is horizontally connected to the upper end of each connecting pipe. The second hydraulic cylinder is provided in a row and is centrally connected to the upper side of the second connecting plate. The piston rod of the second hydraulic cylinder is connected to a "Π"-shaped connecting piece at its end. The lower side of the connecting piece is connected to a "∩"-shaped connecting strip. The top air box is provided with one connecting strip in the middle of a row. The side air box is provided with a pair of connecting strips symmetrically connected to the left and right ends of a row.

[0013] Preferably, a compression spring is fitted between the extension plate and the sliding block on the same side of the mounting rod, and the two ends of the compression spring are welded to the extension plate and the sliding block respectively.

[0014] Preferably, a pair of triangular reinforcing plates are welded to both sides of the bend of the connecting strip.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. The rolled AT rails are hoisted to the rear of the conveying mechanism, and then driven by the motor through the coupling and transmission belt, all the conveying rollers are rotated, thus conveying the AT rails on the conveying rollers forward to the bottom of the air-cooling mechanism.

[0017] 2. After the piston rod of hydraulic cylinder one retracts and is driven by the hinge bar and sliding block, it drives the centering bars and ball wheels on both sides to move in opposite directions, thereby accurately positioning the rail head of the AT rail on the conveying roller directly below the air-cooling mechanism. Then, after the piston rod of hydraulic cylinder one extends and is driven by the hinge bar and sliding block, it drives the centering bars and ball wheels on both sides to move in opposite directions, disengaging from the AT rail.

[0018] 3. After the piston rod of hydraulic cylinder two extends and is driven by connecting plates and connecting strips, it drives the top air box and side air box to move downward. Then, compressed air is blown downward through the top air box to quickly cool the upper surface of the rail head of the AT rail. Then, compressed air is blown inward through the side air box to quickly cool the side surface of the rail head of the AT rail. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the overall front view of the present invention.

[0021] Figure 3 This is a schematic diagram of the conveying mechanism in this invention.

[0022] Figure 4 This is a schematic diagram of the centering mechanism in this invention.

[0023] Figure 5 This is a schematic diagram of the air-cooling mechanism in this invention.

[0024] Figure 6 This is a schematic diagram of the AT rail structure in this invention.

[0025] in:

[0026] 10-Conveying mechanism; 101-Support plate; 102-Support bar; 103-Conveying roller; 104-Pulley; 105-Drive belt; 106-Fixing plate; 107-Motor; 108-Coupling; 109-Support pipe; 110-Support block;

[0027] 20-Centering mechanism; 201-Extension plate; 202-Mounting rod; 203-Flange seat; 204-Sliding block; 205-Sliding column; 206-Mounting plate; 207-Centering bar; 208-Ball wheel; 209-Connecting plate one; 210-Hydraulic cylinder one; 211-Hinge seat; 212-Hinge bar; 213-Compression spring;

[0028] 30-Air-cooled mechanism; 301-Connecting pipe; 302-Connecting plate two; 303-Hydraulic cylinder two; 304-Connecting piece; 305-Connecting strip; 306-Reinforcing piece; 307-Top air box; 308-Side air box;

[0029] 40-AT rails. Detailed Implementation

[0030] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0031] like Figures 1 to 6 As shown, a forging and quenching device for forging the heel end of AT rail type steel rails includes a conveying mechanism 10, a centering mechanism 20, and an air cooling mechanism 30, wherein:

[0032] The conveying mechanism 10 is used to convey the AT rails 40 after rolling or cooling.

[0033] The centering mechanism 20 is located above the conveying mechanism 10 and is used to center and align the rail head of the conveyed AT rail 40.

[0034] The air-cooling mechanism 30 is located above the centering mechanism 20 and is used to rapidly cool the rail head portion of the AT rail 40 after centering.

[0035] In this embodiment, the conveying mechanism 10 includes a support plate 101, support bars 102, a fixing plate 106, a motor 107, a support pipe 109, and a support block 110. The support plate 101 is horizontally arranged. A pair of support bars 102 are symmetrically connected to the upper side of the support plate 101. A conveying roller 103 is evenly rotatably connected between the two support bars 102. Both ends of the conveying roller 103 are keyed to pulleys 104. A transmission belt 1 connects the pulleys 104 on the same side. 05 Connection: The fixed plate 106 is provided in two pairs and symmetrically connected to the front and rear sides of the support plate 101. The motor 107 is provided in two pairs and correspondingly connected to the outer sides of the two pairs of support plates 101. The output shaft of the pair of motors 107 located on the same side is coaxially connected to the two ends of the outermost conveying roller 103 through a pair of couplings 108. The support tube 109 is provided in six sections and distributedly connected to the lower side of the support plate 101. The support block 110 is provided in six sections and correspondingly connected to the lower end of each support tube 109.

[0036] In this embodiment, the centering mechanism 20 includes an extension plate 201, a mounting rod 202, a centering strip 207, a connecting plate 209, and a hydraulic cylinder 210. The extension plate 201 has a pair of plates symmetrically connected to the ends of two support bars 102. A mounting rod 202 is located between the two extension plates 201 on the same side. The two ends of the mounting rod 202 are connected to the inner side of the extension plate 201 via a pair of flange seats 203. A pair of sliding blocks 204 are slidably connected to the mounting rod 202. A sliding column 205 is vertically fixed to the outer side of each sliding block 204. A "┴"-shaped mounting plate 206 is vertically mounted on the upper side of each sliding block 204. The centering strip 207 is provided in pairs and is symmetrically distributed on the left and right. The two ends of the centering strip 207 are connected to the upper parts of two mounting plates 206 located on the same side. Steam turbines 208 are evenly connected to the inner wall of the centering strip 207. The connecting plate 209 is provided in pairs and is symmetrically connected to the lower side of the support plate 101. The hydraulic cylinder 210 is provided in pairs and is connected to the lower side of the two connecting plates 209. The piston rod end of the hydraulic cylinder 210 is connected to a hinge seat 211. A pair of hinge bars 212 are symmetrically hinged on the left and right sides of the hinge seat 211. The upper end of the hinge bar 212 located on the same side is hinged to the outer end of the sliding column 205.

[0037] In this embodiment, the air-cooling mechanism 30 includes a connecting pipe 301, a second connecting plate 302, a second hydraulic cylinder 303, a top air box 307, and a side air box 308. The connecting pipe 301 has four pipes that are distributed and connected to the upper side of the support plate 101. The second connecting plate 302 is horizontally connected to the upper end of each connecting pipe 301. The second hydraulic cylinder 303 has a row of pipes that are centrally connected to the upper side of the second connecting plate 302. The piston rod of the second hydraulic cylinder 303 is connected to a "Π"-shaped connecting piece 304. The lower side of the connecting piece 304 is connected to a "∩"-shaped connecting strip 305. The top air box 307 has a section that is connected to the middle of a row of connecting strips 305. The side air box 308 has a pair of connecting strips 305 that are symmetrically connected to the left and right ends of a row of connecting strips 305.

[0038] In this embodiment, a compression spring 213 is fitted between the extension plate 201 and the sliding block 204 on the same side of the mounting rod 202. The two ends of the compression spring 213 are welded to the extension plate 201 and the sliding block 204, respectively. By adding the compression spring 213, the ball wheel 208 can be quickly disengaged from the AT rail 40.

[0039] In this embodiment, a pair of triangular reinforcing plates 306 are welded to both bends of the connecting strip 305. Adding reinforcing plates 306 improves the structural strength of the connecting strip 305.

[0040] In practical applications, this forging and quenching device used for forging the heel end of AT rail type steel rails is as follows:

[0041] Step 1: The rolled AT rail 40 is hoisted to the rear of the conveying mechanism 10, and then driven by the motor 107 through the coupling 108 and the transmission belt 105, all the conveying rollers 103 are rotated, and the AT rail 40 on the conveying rollers 103 is conveyed forward to the bottom of the air-cooling mechanism 30.

[0042] Step 2: After the piston rod of hydraulic cylinder 210 retracts and is driven by hinge bar 212 and sliding block 204, it drives the centering bars 207 and ball wheels 208 on both sides to move in opposite directions, thereby accurately positioning the rail head of AT rail 40 on conveying roller 103 directly below air cooling mechanism 30. Then, after the piston rod of hydraulic cylinder 210 extends and is driven by hinge bar 212 and sliding block 204, it drives the centering bars 207 and ball wheels 208 on both sides to move in opposite directions, disengaging from contact with AT rail 40.

[0043] Step 3: The piston rod of hydraulic cylinder 2 303 extends and is driven by connecting plate 304 and connecting bar 305, which then drives the top air box 307 and side air box 308 to move downward. The top air box 307 blows compressed air downward to quickly cool the upper surface of the rail head of AT rail 40, and the side air box 308 blows compressed air inward to quickly cool the side surface of the rail head of AT rail 40.

[0044] Step 4: The piston rod of hydraulic cylinder 2 303 retracts and is driven by connecting plate 304 and connecting bar 305, which in turn drives the top air box 307 and side air box 308 to move upward.

[0045] Step 5: After being driven by the motor 107 through the coupling 108 and the transmission belt 105, all the conveyor rollers 103 are rotated, thereby conveying the cooled AT rails 40 on the conveyor rollers 103 forward.

[0046] Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not exhaustive. All modifications within the scope of this invention or its equivalents are included in this invention.

Claims

1. A forging and quenching device for forging the heel end of AT rail type steel rails, characterized in that, It includes a conveying mechanism (10), a centering mechanism (20), and an air-cooling mechanism (30), wherein: The conveying mechanism (10) is used to convey the rolled or cooled AT rails (40); The centering mechanism (20) is located above the conveying mechanism (10) and is used to center and align the rail head of the conveyed AT rail (40). The air-cooling mechanism (30) is located above the centering mechanism (20) and is used to quickly cool the rail head portion of the AT rail (40) after centering. The conveying mechanism (10) includes a support plate (101), support bars (102), a fixed plate (106), a motor (107), a support pipe (109), and a support block (110). The support plate (101) is horizontally arranged. A pair of support bars (102) are symmetrically connected to the upper side of the support plate (101). A conveying roller (103) is evenly rotatably connected between the two support bars (102). Both ends of the conveying roller (103) are keyed to pulleys (104). A transmission belt connects the pulleys (104) on the same side. 105) Connection, the fixed plate (106) is provided in two pairs and is symmetrically connected to the front and rear sides of the support plate (101), the motor (107) is provided in two pairs and is correspondingly connected to the outside of the two pairs of support plates (101), the output shaft of the pair of motors (107) located on the same side is coaxially connected to the two ends of the outermost conveying roller (103) through a pair of couplings (108), the support tube (109) is provided in six and is distributedly connected to the lower side of the support plate (101), the support block (110) is provided in six and is correspondingly connected to the lower end of each support tube (109); The centering mechanism (20) includes an extension plate (201), a mounting rod (202), a centering bar (207), a connecting plate (209), and a hydraulic cylinder (210). The extension plate (201) is provided with a pair of rods symmetrically connected to the ends of two support bars (102). A mounting rod (202) is provided between the two extension plates (201) on the same side. The two ends of the mounting rod (202) are connected to the inner side of the extension plate (201) through a pair of flange seats (203). A pair of sliding blocks (204) are slidably connected to the mounting rod (202). A sliding column (205) is vertically fixed on the outer side of the sliding block (204). A "┴"-shaped mounting plate (206) is vertically installed on the upper side of the sliding block (204). The centering strip (207) is provided in pairs and is symmetrically distributed on the left and right. The two ends of the centering strip (207) are connected to the upper part of the two mounting plates (206) located on the same side. The inner wall of the centering strip (207) is uniformly connected with steam turbines (208). The first connecting plate (209) is provided in pairs and is symmetrically connected to the lower side of the support plate (101). The first hydraulic cylinder (210) is provided in pairs and is connected to the lower side of the two first connecting plates (209). The piston rod end of the first hydraulic cylinder (210) is connected to a hinge seat (211). The left and right sides of the hinge seat (211) are symmetrically hinged with a pair of hinge bars (212). The upper end of the hinge bar (212) located on the same side is hinged to the outer end of the sliding column (205).

2. The forging and quenching device for forging the heel end of AT rail type steel rails according to claim 1, characterized in that, The air-cooling mechanism (30) includes a connecting pipe (301), a second connecting plate (302), a second hydraulic cylinder (303), a top air box (307), and a side air box (308). The connecting pipe (301) has four pipes that are distributed and connected to the upper side of the support plate (101). The second connecting plate (302) is horizontally connected to the upper end of each connecting pipe (301). The second hydraulic cylinder (303) has a row of pipes that are centrally connected to the upper side of the second connecting plate (302). The piston rod of the second hydraulic cylinder (303) is connected to a "Π"-shaped connecting piece (304). The lower side of the connecting piece (304) is connected to a "∩"-shaped connecting strip (305). The top air box (307) has a middle section that is connected to a row of connecting strips (305). The side air box (308) has a pair of connecting strips (305) that are symmetrically connected to the left and right ends of a row.

3. The forging and quenching device for forging the heel end of AT rail type steel rails according to claim 1, characterized in that, The mounting rod (202) has a compression spring (213) fitted between the extension plate (201) and the sliding block (204) on the same side. The two ends of the compression spring (213) are welded to the extension plate (201) and the sliding block (204) respectively.

4. A forging and quenching device for forging the heel end of AT rail type steel rails according to claim 2, characterized in that, A pair of triangular reinforcing plates (306) are welded to both sides of the bend of the connecting strip (305).

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