A casting device and method for high-speed train cast steel brake disc swing grinding

Abstract

This invention provides a casting equipment and method for rolling cast steel brake discs for high-speed trains, relating to the field of rotary rolling equipment technology. The invention includes a fixed frame installed on the ground, with a worktable inside the frame. A mold is placed on the upper end of the worktable. A telescopic hydraulic cylinder is installed inside the fixed frame, and a connecting plate is fixedly installed at the output end of the telescopic hydraulic cylinder. A rolling unit is located at the bottom of the connecting plate. The high-temperature steel disc to be processed can be placed in the mold, and the rolling unit can roll the steel disc. The mold and the worktable are detachable and assembled using a positioning unit. This invention employs a mold clamping structure with clamping arms and wedge locking, combined with a circumferential positioning design of positioning rings and long grooves, solving the problems of existing rotary rolling casting equipment where molds are mostly fixed with bolts, resulting in cumbersome and time-consuming disassembly and assembly, low positioning accuracy, and easy mold displacement.

Description

Technical Field

[0001] This invention relates to the field of rotary rolling equipment technology, and in particular to a casting equipment and method for rolling cast steel brake discs for high-speed trains. Background Technology

[0002] As the core load-bearing component of the high-speed train braking system, the internal density, dimensional accuracy, and mechanical properties of cast steel brake discs directly determine the braking effect and driving safety of the train. The roller casting process, with its advantages of low processing force, high material utilization, dense microstructure of the formed workpiece, and excellent mechanical properties, has become the mainstream process for producing cast steel brake discs for high-speed trains.

[0003] In the pendulum casting process, the rapid and precise fixing of the mold is a crucial step in ensuring processing accuracy and production efficiency. The installation and positioning accuracy of the mold directly affects core dimensional indicators such as the coaxiality and thickness uniformity of the brake disc, while the speed of mold assembly and disassembly directly determines the changeover efficiency and production cycle of the production line. Currently, most pendulum casting equipment in the industry uses bolts to directly fix the mold, that is, multiple bolts are passed through the through holes on the mold flange and tightened to fix the mold to the machine's worktable. The assembly and disassembly process of bolt fixing is extremely cumbersome and time-consuming, which seriously affects the mold changeover efficiency. When changing to molds of different specifications, operators need to use a wrench to unscrew multiple fixing bolts one by one, remove the old mold, align the new mold with the bolt holes, and retighten all the bolts. The entire process requires repeated adjustments to the mold position to ensure alignment accuracy, which is time-consuming and labor-intensive. Moreover, the high temperature and dusty environment of the casting workshop makes the bolts and threaded holes prone to oxidation and rusting due to slag adhesion, further increasing the difficulty of assembly and disassembly, significantly extending the downtime of the production line for changeover, and reducing production efficiency. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art by proposing a casting equipment and method for the rolling of cast steel brake discs for high-speed trains.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a casting equipment for rolling cast steel brake discs of high-speed trains, comprising a fixed frame, the fixed frame being installed on the ground, a worktable being provided inside the fixed frame, a placement mold being provided at the upper end of the worktable, a telescopic hydraulic cylinder being installed inside the fixed frame, a connecting plate being fixedly installed at the output end of the telescopic hydraulic cylinder, and a rolling unit being provided at the bottom of the connecting plate, wherein the high-temperature steel disc to be processed can be placed in the placement mold, wherein the rolling unit can roll the steel disc, and the placement mold and the worktable can be detachably assembled and disassembled by means of a positioning unit.

[0006] Preferably, the positioning unit includes a mounting groove on the upper end of the worktable, and a clamping unit is provided inside the mounting groove. The upper end of the worktable is provided with a placement groove, and the placement mold can be placed in the placement groove and clamped in the placement groove by means of the clamping unit.

[0007] Preferably, the clamping unit includes a sliding block that can slide inside the mounting groove. A clamping arm is rotatably mounted inside the sliding block and can press against the upper end of the mold. A lifting arm is mounted on the bottom side of the clamping arm. A positioning groove is formed on the surface of the lifting arm. A limit rod is provided inside the positioning groove. A wedge is fixedly connected to the surface of the limit rod. The wedge abuts against one side of the lifting arm to ensure that the clamping arm is always pressed above the mold. A locking nut is threaded onto the surface of the limit rod. The limit rod and the mounting groove are rotatably connected. Rotating the limit rod ensures that the wedge can abut against one side of the lifting arm before tightening the locking nut. The locking nut, in conjunction with the wedge, clamps the clamping arm on both sides of the lifting arm to limit its position.

[0008] Preferably, a positioning ring is fixedly connected to the upper end of the mold, and an elongated groove is provided on the surface of the clamping arm, which can be fixed by means of the elongated groove on the surface of the positioning ring.

[0009] Preferably, a guide rod is slidably inserted on the sliding block, and both ends of the guide rod are fixed to the inner wall of the mounting groove. It also includes a lead screw, which is rotatably installed inside the mounting groove. An adjusting nut is fixedly connected to the upper end of the lead screw, which can drive the lead screw to rotate. The rotating lead screw can drive the sliding block to slide on the surface of the guide rod, which can be adapted to different placement molds.

[0010] Preferably, the rolling unit includes a rotating shaft, which is rotatably mounted in a connecting plate. A drive motor is fixedly mounted on the upper end of the connecting plate, and the drive motor can drive the rotating shaft to rotate. A rolling disc is detachably mounted on the bottom end of the rotating shaft. The projection of the rolling disc in the vertical section is an inclined structure, and the rolling disc can be used to roll the steel disc on the upper end.

[0011] Preferably, a track plate is fixedly connected to the upper end of the rolling disc, and a track groove is opened at the upper end of the track plate. A roller is rotatably installed inside the track groove. The roller can be locked inside the track groove. A connecting shaft is rotatably installed at the upper end of the roller. The upper end of the connecting shaft is fixed to the connecting plate. The connecting shaft and roller, together with the track groove, can limit the rotation of the rolling disc and reduce vibration.

[0012] Preferably, it also includes an ejector unit, which can drive an ejector plate to extend out of the mold cavity to eject the steel disc from the mold cavity and place the mold.

[0013] Preferably, the bottom of the mold has a circular groove, the ejector plate can slide vertically inside the groove, a sliding rod is fixedly connected to the bottom of the ejector plate, a first cylinder is fixedly connected to the bottom end of the sliding rod, a return spring is fixedly connected between the ejector plate and the circular groove, the return spring provides elastic force to pull the ejector plate inside the circular groove, a mounting frame is fixedly connected to the upper end of the worktable, a second cylinder is installed inside the mounting frame, the second cylinder is connected to the first cylinder, a pulling screw is rotatably connected to the upper end of the second cylinder, the pulling screw is threaded through the mounting frame, a handle is fixedly connected to the upper end of the pulling screw, the handle can be rotated to drive the pulling screw to push the second cylinder to retract and the first cylinder to extend, so that the ejector plate is ejected from the circular groove.

[0014] Preferably, a casting method for a cast steel brake disc swivel for high-speed trains, employing any one of the casting equipment described above, includes the following steps: S1. Power on the casting equipment and complete the system self-test. Check the operating status of the telescopic hydraulic cylinder, drive motor, and ejection unit. Clean the oxide scale and residue on the surface of the mold and rolling plate. Prepare the high-temperature cast steel brake disc blank of the corresponding specification. S2. Place the mold smoothly into the placement slot at the top of the workbench, turn the adjusting nut to drive the lead screw to rotate, and drive the sliding block to slide along the guide rod to the appropriate position. Turn the clamping arm so that it passes through the long slot and is locked onto the positioning ring at the top of the mold. Turn the limiting rod so that the wedge block presses against the lifting arm. Tighten the locking nut to complete the fixing of the mold. S3. Place the preheated high-temperature cast steel brake disc blank into the inner cavity of the placement mold and adjust the position of the blank to make it coincide with the center of the placement mold. S4. Start the telescopic hydraulic cylinder to move the connecting plate and the rolling unit downwards until the rolling disc contacts the upper surface of the billet. Set the speed of the drive motor, the feed speed of the telescopic hydraulic cylinder and the total feed amount parameters. S5. Start the drive motor, which drives the rolling disc to rotate at high speed through the rotating shaft. The inclined rolling disc continuously rolls the surface of the blank. At the same time, the telescopic hydraulic cylinder feeds slowly according to the preset parameters. During the processing, the connecting shaft, roller and track groove cooperate to guide and limit the rolling disc, reduce rotational vibration, until the blank is rolled to the preset thickness and shape. S6. After the oscillating milling process is completed, the drive motor stops running, and the telescopic hydraulic cylinder drives the connecting plate and the rolling unit to move upward and reset to the initial standby position. S7. Turn the handle to move the pull screw downward, push the second cylinder to retract, and extend the first cylinder through the air passage. This will cause the sliding rod and the ejector plate to extend upward out of the round groove, smoothly ejecting the processed brake disc from the inner cavity of the mold. After removing the brake disc, turn the handle in the opposite direction, and the reset spring will cause the ejector plate to fall back into the round groove. S8. Clean the metal debris from the inner cavity of the placement mold and the surface of the worktable. If different specifications of brake discs need to be processed, loosen the locking nut, lift the clamping arm, replace the placement mold of the corresponding specifications and fix it again, and then proceed with the next batch of production.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are as follows: 1. In this invention, a mold clamping structure with clamping arms and wedge blocks for locking is adopted. Combined with the circumferential positioning design of positioning rings and long grooves, it solves the problems of existing swing mill casting equipment molds being fixed with bolts, which are cumbersome and time-consuming to disassemble and assemble, have low positioning accuracy, and are prone to mold displacement. Mold clamping and unlocking can be completed quickly without the use of special tools, which greatly shortens the mold changeover time. At the same time, it can achieve precise circumferential positioning of the mold, effectively preventing the mold from moving during swing mill processing and ensuring processing accuracy.

[0016] 2. In this invention, an adjustment structure in which a lead screw drives a sliding block to slide laterally along a guide rod is adopted, which solves the problem that the existing clamping device has a fixed position and cannot be adapted to molds of different sizes and specifications. The clamping position of the clamping arm can be quickly adjusted by simply rotating the adjusting nut. It can be compatible with the production needs of cast steel brake discs of various specifications of high-speed trains without replacing the entire positioning device, which greatly reduces the equipment modification cost.

[0017] 3. In this invention, a guide support structure for the rolling disc, which combines a track disc with rollers, is adopted. This solves the problem that the rolling disc of the existing swing rolling equipment is prone to vibration when rotating at high speed, resulting in poor surface flatness, uneven thickness, and low processing accuracy of the brake disc. The rollers rolling along the annular track groove can form a stable auxiliary support for the rolling disc, effectively absorbing the vibration during the rotation process, improving the running stability of the rolling disc, and ensuring the processing accuracy and surface quality of the brake disc. Attached Figure Description

[0018] Figure 1 This invention provides a three-dimensional structural schematic diagram of a casting equipment and method for the rolling of cast steel brake discs on high-speed trains. Figure 2 This invention presents a partial internal structural schematic diagram of a casting equipment and method for the rolling of cast steel brake discs on high-speed trains. Figure 3 This is a partial schematic diagram of the positioning unit in a casting equipment and method for rolling cast steel brake discs of high-speed trains, as proposed in this invention. Figure 4This invention provides a partial schematic diagram of the rolling unit in a casting equipment and method for rolling cast steel brake discs of high-speed trains. Figure 5 This invention proposes a casting equipment and method for the rolling of cast steel brake discs for high-speed trains. Figure 2 Enlarged view of point A; Figure 6 This invention proposes a casting equipment and method for the rolling of cast steel brake discs for high-speed trains. Figure 4 Enlarged view of point B; Figure 7 This invention presents a partial schematic diagram of the ejection unit in a casting equipment and method for rolling cast steel brake discs of high-speed trains.

[0019] Legend: 1. Fixed frame; 2. Workbench; 3. Telescopic hydraulic cylinder; 4. Connecting plate; 5. Drive motor; 6. Mold placement; 7. Positioning unit; 71. Mounting groove; 72. Positioning ring; 73. Sliding block; 74. Lead screw; 75. Adjusting nut; 76. Clamping arm; 77. Guide rod; 78. Raising arm; 79. Positioning groove; 710. Limiting rod; 711. Wedge; 712. Locking nut; 713. Long groove; 8. Ejection unit; 81. Ejection plate; 82. Circular groove; 83. Return spring; 84. Sliding rod; 85. Cylinder No. 1; 86. Mounting frame; 87. Cylinder No. 2; 88. Pull screw; 89. Handle; 9. Rolling unit; 91. Rotating shaft; 92. Track plate; 93. Rolling plate; 94. Track groove; 95. Roller; 96. Connecting shaft. Detailed Implementation

[0020] like Figure 1-7As shown, this invention provides a casting equipment and method for rolling cast steel brake discs for high-speed trains. It includes a fixed frame 1 vertically fixed to the ground, a worktable 2 horizontally fixed inside the fixed frame 1, a placement mold 6 detachably positioned on the upper surface of the worktable 2, a telescopic hydraulic cylinder 3 vertically fixed to the top of the fixed frame 1, a connecting plate 4 horizontally fixed to the lower end of the piston rod of the telescopic hydraulic cylinder 3, and a rolling unit 9 rotatably mounted on the lower surface of the connecting plate 4. The high-temperature steel disc to be processed can be placed in the inner cavity of the placement mold 6. The telescopic hydraulic cylinder 3 can drive the rolling unit 9 to move vertically up and down, and the rolling unit 9 can continuously roll and shape the surface of the steel disc. The placement mold 6 and the worktable 2 are detachably assembled via a positioning unit 7. The positioning unit 7 includes an installation groove 71 opened on the upper surface of the worktable 2, a clamping unit disposed within the installation groove 71, and a placement groove adapted to the shape of the placement mold 6 opened on the upper surface of the worktable 2. The clamping unit can clamp and fix the placement mold 6 within the placement groove. The clamping unit includes a sliding block 73 slidably mounted in the mounting groove 71. A clamping arm 76 is hinged to the upper end of the sliding block 73. The clamping arm 76 can rotate around the hinge axis and press against the upper end face of the placement mold 6. A lifting arm 78 is fixedly provided at the end of the clamping arm 76 away from the placement mold 6. A positioning groove 79 is provided on the surface of the lifting arm 78. A limit rod 710 is rotatably mounted in the mounting groove 71. A wedge 711 is fixedly mounted on the surface of the limit rod 710. A locking nut 712 is threaded on the surface of the limit rod 710. Rotating the limit rod 710 can drive the wedge 711 to press against the side of the lifting arm 78. Tightening the locking nut 712 can cooperate with the wedge 711 to clamp the lifting arm 78 and lock the clamping state of the clamping arm 76. A positioning ring 72 is fixedly provided circumferentially on the upper end face of the placement mold 6. A long groove 713 is provided on the surface of the clamping arm 76. The clamping arm 76 can be engaged with the surface of the positioning ring 72 through the long groove 713 to achieve circumferential positioning of the placement mold 6. A guide rod 77 is fixedly installed laterally in the mounting groove 71. A sliding block 73 is slidably sleeved on the outer periphery of the guide rod 77. A lead screw 74 is also rotatably assembled in the mounting groove 71. The lead screw 74 is threadedly connected to the sliding block 73. An adjusting nut 75 is fixedly installed at the upper end of the lead screw 74. Rotating the adjusting nut 75 can drive the sliding block 73 to slide laterally along the guide rod 77 to adapt to placement molds 6 of different sizes. The rolling unit 9 includes a rotating shaft 91 vertically rotatably mounted at the center of the connecting plate 4. A drive motor 5 is fixedly mounted on the upper end face of the connecting plate 4, and the output shaft of the drive motor 5 is coaxially fixedly connected to the rotating shaft 91. A rolling disc 93 is detachably fixedly mounted on the bottom end of the rotating shaft 91. The axis of the rolling disc 93 is inclined at an angle to the axis of the rotating shaft 91, and can rotate with the rotating shaft 91 to perform rotary rolling processing on the steel disc. A track disc 92 is coaxially fixedly mounted on the upper end face of the rolling disc 93. An annular track groove 94 is opened on the upper end face of the track disc 92. A connecting shaft 96 is vertically fixedly mounted on the lower end face of the connecting plate 4. A roller 95 is rotatably mounted on the bottom end of the connecting shaft 96. The roller 95 rolls and fits into the inside of the track groove 94, which can guide and limit the rotation of the rolling disc 93 and reduce rotational vibration.It also includes an ejection unit 8, which can drive the ejection plate 81 to extend vertically out of the bottom surface of the inner cavity of the placement mold 6, and eject the processed steel disc from the placement mold 6 for demolding. A circular groove 82 is provided at the bottom of the mold 6. The ejector plate 81 is vertically slidably assembled in the circular groove 82. A return spring 83 is fixed between the ejector plate 81 and the inner bottom wall of the circular groove 82. A sliding rod 84 is vertically fixed on the lower end face of the ejector plate 81. A first cylinder 85 is fixed on the bottom end of the sliding rod 84. A mounting bracket 86 is vertically fixed on the lower end face of the worktable 2. A second cylinder 87 is fixed on the mounting bracket 86. The second cylinder 87 is connected to the first cylinder 85 by air circuit. A pull screw 88 is rotatably connected to the upper end of the second cylinder 87. The pull screw 88 is threaded through the top plate of the mounting bracket 86. A handle 89 is fixed on the upper end of the pull screw 88. Rotating the handle 89 can drive the pull screw 88 to move vertically, push the second cylinder 87 to retract, and then drive the first cylinder 85 to extend, causing the ejector plate 81 to be ejected upward.

[0021] Working principle: Before the high-speed train cast steel brake disc casting operation, the equipment is powered on and a system self-check is completed. The operating status of the telescopic hydraulic cylinder 3, drive motor 5, and ejection unit 8 is checked. The oxide scale and metal residue on the surface of the placement mold 6 and the rolling disc 93 are cleaned, and the high-temperature cast steel brake disc blank of the corresponding specification is prepared. The placement mold 6 is placed smoothly into the placement slot at the upper end of the worktable 2. The adjusting nut 75 is rotated to drive the lead screw 74 to rotate, causing the sliding block 73 to slide laterally along the guide rod 77 to a position that matches the size of the placement mold 6. The clamping arm 76 is rotated so that it is engaged with the positioning ring 72 at the upper end of the placement mold 6 through the long slot 713. The limiting rod 710 is rotated so that the wedge block 711 is pressed against the side of the lifting arm 78. The locking nut 712 is tightened to complete the clamping and fixing of the placement mold 6. The high-temperature cast steel brake disc blank, preheated to the specified temperature, is placed smoothly into the inner cavity of the placement mold 6. The position of the blank is adjusted so that it coincides with the center of the placement mold 6 to ensure the uniformity of the subsequent rolling process. The telescopic hydraulic cylinder 3 is activated, causing the connecting plate 4 and the rolling unit 9 to move downwards as a whole until the lower surface of the rolling disc 93 is in close contact with the upper surface of the billet. The speed of the drive motor 5 and the feed speed and total feed amount of the telescopic hydraulic cylinder 3 are set. The drive motor 5 is then activated, driving the rolling disc 93 to rotate at high speed via the rotating shaft 91. The tilted rolling disc 93 applies continuous rolling pressure to the surface of the billet, causing the billet to gradually undergo plastic deformation and form a disc shape. During processing, the rollers 95 roll along the annular track groove 94 at the upper end of the track disc 92, guiding and supporting the rotation of the rolling disc 93, effectively reducing vibration during high-speed rotation and improving processing accuracy and surface quality. After the rolling process is completed, the drive motor 5 stops, and the telescopic hydraulic cylinder 3 moves the connecting plate 4 and the rolling unit 9 upwards, resetting them to the initial standby position. Rotating handle 89 moves the pull screw 88 downward, causing the piston rod of cylinder 87 to retract. Since cylinder 87 is connected to cylinder 85, the gas in cylinder 87 is forced into cylinder 85, causing the piston rod of cylinder 85 to extend. This extends the sliding rod 84 and the ejector plate 81 upward out of the circular groove 82, smoothly ejecting the finished brake disc from the inner cavity of the mold 6. After removing the brake disc, rotating handle 89 in the opposite direction causes the return spring 83 to pull the ejector plate 81 downward back into the circular groove 82, simultaneously resetting cylinders 85 and 87 to their initial state. Clean the metal debris from the inner cavity of the placement mold 6 and the surface of the worktable 2. If different specifications of brake discs need to be processed, simply loosen the locking nut 712, rotate the limit rod 710 in the opposite direction to disengage the wedge 711 from the lifting arm 78, lift the clamping arm 76 to remove the original placement mold 6, replace the placement mold 6 with the corresponding specification and repeat the above fixing steps to quickly complete the equipment changeover production.

[0022] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any other way. Any person skilled in the art may utilize the disclosed technical content to make changes or modifications to create equivalent embodiments applicable to other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, still fall within the protection scope of the present invention. In the description of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in the present invention can be understood through specific circumstances.

Claims

1. A casting equipment for rolling cast steel brake discs of high-speed trains, characterized in that: The device includes a fixed frame (1) installed on the ground. A workbench (2) is provided inside the fixed frame (1). A placement mold (6) is provided at the upper end of the workbench (2). A telescopic hydraulic cylinder (3) is installed inside the fixed frame (1). A connecting plate (4) is fixedly installed at the output end of the telescopic hydraulic cylinder (3). A rolling unit (9) is provided at the bottom of the connecting plate (4). The high-temperature steel disc to be processed can be placed in the placement mold (6). The rolling unit (9) can roll the steel disc. The placement mold (6) and the workbench (2) can be disassembled and assembled by means of a positioning unit (7).

2. The casting equipment for the rolling mill of cast steel brake discs for high-speed trains according to claim 1, characterized in that: The positioning unit (7) includes an installation slot (71) on the upper end of the workbench (2). The installation slot (71) is equipped with a pressing unit. The upper end of the workbench (2) is provided with a placement slot. The placement mold (6) can be placed in the placement slot and pressed into the placement slot by means of the pressing unit.

3. The casting equipment for the rolling mill of cast steel brake discs for high-speed trains according to claim 2, characterized in that: The clamping unit includes a sliding block (73), which can slide inside the mounting groove (71). A clamping arm (76) is rotatably mounted inside the sliding block (73). The clamping arm (76) can press against the upper end of the mold (6). A lifting arm (78) is mounted on the bottom side of the clamping arm (76). A positioning groove (79) is opened on the surface of the lifting arm (78). A limit rod (710) is provided inside the positioning groove (79). A wedge (711) is fixedly connected to the surface of the limit rod (710). The wedge (711) abuts against one side of the lifting arm (78) to ensure that the clamping arm (76) is always pressed above the placement mold (6). The surface of the limiting rod (710) is threaded with a locking nut (712). The limiting rod (710) and the mounting groove (71) are rotatably connected. The rotatable limiting rod (710) ensures that the wedge (711) can abut against one side of the lifting arm (78) and then the locking nut (712) is tightened. With the help of the locking nut (712) and the wedge (711), the clamping arm (76) is clamped on both sides of the lifting arm (78) to limit the clamping arm (76).

4. The casting equipment for the rolling mill of cast steel brake discs for high-speed trains according to claim 3, characterized in that: The upper end of the placement mold (6) is fixedly connected to a positioning ring (72), and the surface of the clamping arm (76) is provided with a long groove (713). The clamping arm (76) can be fixed by means of the long groove (713) on the surface of the positioning ring (72).

5. The casting equipment for the rolling mill of cast steel brake discs for high-speed trains according to claim 3, characterized in that: The sliding block (73) is slidably inserted with a guide rod (77). The two ends of the guide rod (77) are fixed to the inner wall of the mounting groove (71). It also includes a lead screw (74). The lead screw (74) is rotatably installed inside the mounting groove (71). The upper end of the lead screw (74) is fixedly connected with an adjusting nut (75). The lead screw (74) can be driven to rotate by the adjusting nut (75). The rotating lead screw (74) can drive the sliding block (73) to slide on the surface of the guide rod (77). It can be adapted to different placement molds (6).

6. The casting equipment for the rolling mill of cast steel brake discs for high-speed trains according to claim 1, characterized in that: The rolling unit (9) includes a rotating shaft (91), which is rotatably mounted in a connecting plate (4). A drive motor (5) is fixedly mounted on the upper end of the connecting plate (4). The drive motor (5) can drive the rotating shaft (91) to rotate. A rolling disc (93) is detachably mounted on the bottom end of the rotating shaft (91). The projection of the rolling disc (93) on the vertical section is an inclined structure. The rolling disc (93) can be used to roll on the upper end of the steel disc.

7. The casting equipment for the rolling mill of cast steel brake discs for high-speed trains according to claim 6, characterized in that: The upper end of the rolling disc (93) is fixedly connected to a track disc (92). The upper end of the track disc (92) is provided with a track groove (94). A roller (95) is rotatably installed inside the track groove (94). The roller (95) can be locked inside the track groove (94). A connecting shaft (96) is rotatably installed on the upper end of the roller (95). The upper end of the connecting shaft (96) is fixed to the connecting plate (4). The connecting shaft (96) and the roller (95) can be used in conjunction with the track groove (94) to limit the rotation of the rolling disc (93) and reduce vibration.

8. The casting equipment for the rolling mill of cast steel brake discs for high-speed trains according to claim 1 or 5, characterized in that: It also includes an ejection unit (8), which can drive an ejection plate (81) to extend in the cavity of the placement mold (6) to eject the steel plate in the cavity of the mold from the placement mold (6).

9. The casting equipment for the rolling mill of cast steel brake discs for high-speed trains according to claim 8, characterized in that: The placement mold (6) has a circular groove (82) at its bottom. The ejector plate (81) can slide vertically inside the circular groove (82). A sliding rod (84) is fixedly connected to the bottom of the ejector plate (81). A cylinder (85) is fixedly connected to the bottom end of the sliding rod (84). A return spring (83) is fixedly connected between the ejector plate (81) and the circular groove (82). The return spring (83) provides elastic force to pull the ejector plate (81) inside the circular groove (82). A mounting bracket (85) is fixedly connected to the upper end of the worktable (2). 6) The mounting bracket (86) is equipped with a second cylinder (87), which is connected to the first cylinder (85). The upper end of the second cylinder (87) is rotatably connected to a pull screw (88). The pull screw (88) is threaded through the mounting bracket (86). The upper end of the pull screw (88) is fixedly connected to a handle (89). The handle (89) can be rotated to drive the pull screw (88) to push the second cylinder (87) to retract, so that the first cylinder (85) can extend and the ejector plate (81) can be ejected from the circular groove (82).

10. A casting method for a cast steel brake disc oscillating mechanism for high-speed trains, characterized in that: The casting equipment for high-speed train cast steel brake disc rolling as described in any one of claims 1-9 includes the following steps: S1. Power on the casting equipment and complete the system self-test. Check the operating status of the telescopic hydraulic cylinder (3), drive motor (5), and ejection unit (8). Clean the oxide scale and residue on the surface of the placement mold (6) and rolling plate (93). Prepare the high-temperature cast steel brake disc blank of the corresponding specification. S2. Place the placement mold (6) smoothly into the placement slot at the top of the workbench (2), rotate the adjusting nut (75) to drive the lead screw (74) to rotate, and drive the sliding block (73) to slide along the guide rod (77) to the appropriate position. Rotate the clamping arm (76) so that it passes through the long slot (713) and is clamped on the surface of the positioning ring (72) at the top of the placement mold (6). Rotate the limiting rod (710) so that the wedge (711) presses against the lifting arm (78). Tighten the locking nut (712) to complete the fixing of the placement mold (6). S3. Place the preheated high-temperature cast steel brake disc blank into the inner cavity of the placement mold (6) and adjust the position of the blank to make it coincide with the center of the placement mold (6). S4. Start the telescopic hydraulic cylinder (3) to drive the connecting plate (4) and the rolling unit (9) to move downward until the rolling disc (93) contacts the upper surface of the billet. Set the speed of the drive motor (5), the feed speed of the telescopic hydraulic cylinder (3) and the total feed parameters. S5. Start the drive motor (5), drive the rolling disc (93) to rotate at high speed through the rotating shaft (91). The inclined rolling disc (93) continuously rolls the surface of the blank. At the same time, the telescopic hydraulic cylinder (3) feeds slowly according to the preset parameters. During the processing, the connecting shaft (96), roller (95) and track groove (94) cooperate to guide and limit the rolling disc (93) to reduce rotational vibration until the blank is rolled to the preset thickness and shape. S6. After the oscillating milling process is completed, the drive motor (5) stops running, and the telescopic hydraulic cylinder (3) drives the connecting plate (4) and the rolling unit (9) to move upward and reset to the initial standby position. S7. Turn the handle (89) to drive the pull screw (88) to move downward, push the second cylinder (87) to retract, and extend the first cylinder (85) through the air passage connection, which drives the sliding rod (84) and the ejector plate (81) to extend upward out of the round groove (82), and smoothly eject the processed brake disc from the inner cavity of the mold (6). After taking out the brake disc, turn the handle (89) in the opposite direction, and the reset spring (83) will drive the ejector plate (81) to fall back into the round groove (82); S8. Clean the metal debris from the inner cavity of the placement mold (6) and the surface of the worktable (2). If different specifications of brake discs need to be processed, loosen the locking nut (712), lift the clamping arm (76), replace the placement mold (6) with the corresponding specifications and fix it again, and then the next batch of production operations can be carried out.

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