Rail transit aluminum alloy structural member chamfering mechanism

Abstract

The utility model provides a rail transit aluminum alloy structural member chamfer mechanism, including clamp and workstation, the side surface fixed connection of clamp has the mounting plate, is provided with the symmetrical adjusting plate in the both sides of clamp, the fixed connection of adjusting plate has the extension plate, the inboard of extension plate is fixedly connected with the clamping plate through bolt, the both sides fixed connection of adjusting plate has the mounting seat, rotates and is connected with the gyro wheel in the mounting seat, workstation fixedly connected has chamfer part, chamfer part includes first chamfer part and second chamfer part, is provided with the middle recess between chamfer part, clamp installs in the middle recess, and the two side angles of structural member are chamfered simultaneously through the cutter of chamfer part processing. The utility model discloses, through setting detachable clamping plate, can customize and change the clamping plate of different specifications shape according to the edge angle profile, amplitude etc. of work piece, effectively enhanced the adaptation ability of clamp to multiple aluminum alloy structural member, and bolt connection design makes the replacement need not complex tool, and it is quick and efficient.

Description

Technical Field

[0001] This utility model relates to the field of aluminum alloy chamfering technology for rail transit, specifically a chamfering mechanism for aluminum alloy structural components in rail transit. Background Technology

[0002] In the field of rail transit equipment manufacturing, aluminum alloy structural components are widely used in key parts such as car body frames and connectors due to their advantages of lightweight and high strength. After these structural components are processed and formed, their edges and corners often have problems such as burrs and sharp edges. If these are not treated, they will not only affect the accuracy of subsequent assembly, but may also cause structural fatigue due to stress concentration during use, and even pose safety hazards such as scratching operators or damaging other components. Therefore, chamfering the edges and corners of aluminum alloy structural components is a necessary process to ensure product quality and safe use.

[0003] However, existing chamfering equipment often uses manual bolt tightening or single slide rail sliding to adjust the clamping distance of the fixtures. The adjustment process is cumbersome and laborious. Furthermore, the shape of the fixtures is fixed, making it difficult to adapt to aluminum alloy structural parts of different widths and shapes, resulting in poor fixture versatility. In addition, the chamfering mechanism of existing equipment is mostly designed for single-sided processing, requiring chamfering operations on both sides of the workpiece separately, which results in long processing cycles and low efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a chamfering mechanism for aluminum alloy structural components in rail transit, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A chamfering mechanism for aluminum alloy structural components used in rail transit, comprising:

[0007] The clamp has a mounting plate fixedly connected to its side, and symmetrical adjustment plates are provided on both sides inside the clamp. An extension plate is fixedly connected to the adjustment plate, and a clamping plate is fixedly connected to the inner side of the extension plate by bolts. The distance between the two adjustment plates can be adjusted by adjusting the structure.

[0008] The bottom two sides of the adjusting plate are fixedly connected to mounting bases, and rollers are rotatably connected inside the mounting bases. The wheel surface of the rollers is in contact with the inner wall of the groove. When the adjusting plate moves, the rollers roll along the inside of the groove, converting the sliding friction between the adjusting plate and the bottom of the clamp into rolling friction, thereby reducing the resistance during the movement of the adjusting plate.

[0009] A workbench is fixedly connected to a chamfered part, which includes a first chamfered part and a second chamfered part. A central groove is provided between the chamfered parts, and the fixture is installed in the central groove. The chamfered part is used to simultaneously chamfer the two sides of the structural component.

[0010] Preferably, the adjustment structure includes an adjustment screw and an adjustment guide rod. The two ends of the adjustment screw are rotatably connected to both sides of the inner wall of the fixture via bearings. The two sides of the adjustment screw are provided with symmetrical and opposite threads. A knob is fixedly connected to the outer side of one end of the adjustment screw. The adjustment guide rod is fixedly connected to the inner side of the fixture. The adjustment guide rod passes through two adjustment plates respectively. An extension plate is fixedly connected to the top of the adjustment plate. The extension plate passes through a slide groove at the top of the fixture. A limit plate is integrally formed in the middle of the slide groove to prevent the extension plate and the adjustment plate from overstepping their designated positions.

[0011] Preferably, the bottom inner side of the clamp has a groove extending along the moving direction of the adjusting plate, corresponding to the position of the roller.

[0012] Preferably, the clamp is fixedly connected to the upper end face of the feeding slide via a mounting plate, and the feeding slide is slidably connected to the feeding rail on the feeding section.

[0013] Preferably, a second fixing plate is fixedly connected to the rear end face of the feeding slide rail by bolts, a second hydraulic cylinder is fixedly connected to the rear end face of the second fixing plate, the piston rod of the second hydraulic cylinder passes through the second fixing plate and is connected to the feeding slide, and guide rods are also fixedly connected to both sides of the rear end face of the feeding slide, the guide rods passing through the through holes on both sides of the second fixing plate.

[0014] Preferably, the first chamfered portion includes a chamfering slide rail, which is fixedly connected to the upper end face of the first chamfered portion. A chamfering slide table is slidably connected to the chamfering slide rail, and a tool holder is fixedly connected above the chamfering slide table. The front end of the tool holder holds a chamfering tool.

[0015] Preferably, the upper end of the tool holder is fixedly connected to a motor via a motor mounting bracket, the output end of the motor is connected to a second pulley, the rear end of the chamfering tool shaft is connected to a first pulley, and a transmission belt is provided between the first pulley and the second pulley.

[0016] Preferably, the end of the chamfered slide rail is fixedly connected to a first fixing plate by bolts, the rear end face of the first fixing plate is fixedly connected to a first hydraulic cylinder, the piston rod of the first hydraulic cylinder passes through the first fixing plate and is connected to the chamfered slide, and guide rods are also fixedly connected to both sides of the rear end face of the chamfered slide, the guide rods passing through the through holes on both sides of the first fixing plate.

[0017] Preferably, the second chamfered portion has the same structure as the first chamfered portion, including a chamfered slide rail, a chamfered slide table, a tool holder, a chamfered tool, a motor, a motor mounting bracket, a first pulley, a second pulley, a transmission belt, a first fixing plate, a first hydraulic cylinder, and a guide rod. The second chamfered portion and the first chamfered portion are arranged in opposite directions with the central axis of the central groove as the center of symmetry.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] This utility model, by setting an adjusting screw and knob structure inside the fixture, and with the guidance of the adjusting guide rod, can quickly adjust the distance between the two side adjusting plates and the clamping plate, so as to clamp and fix workpieces of different widths. It is convenient to operate and precise to adjust.

[0020] This invention transforms the sliding friction of the adjusting plate into rolling friction by setting a mounting base, rollers, and a rolling groove at the bottom of the clamp on the bottom of the adjusting plate. This reduces the adjustment resistance and makes the clamping operation easier and smoother. At the same time, the rollers are made of wear-resistant and non-slip material, which extends the service life of the equipment.

[0021] This utility model, by setting a detachable clamping plate, allows for the customization and replacement of clamping plates of different specifications and shapes according to the edge contours and curvature of the workpiece, effectively enhancing the adaptability of the fixture to various aluminum alloy structural parts. Furthermore, the bolt connection design eliminates the need for complex tools during replacement, making it quick and efficient.

[0022] By setting up symmetrically distributed first and second chamfered sections, and setting them in opposite directions with the central axis of the groove as the center of symmetry, simultaneous chamfering of the two sides of the workpiece is achieved, thus improving processing efficiency. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a three-dimensional schematic diagram of the chamfered slide and tool holder of this utility model;

[0025] Figure 3 This is a three-dimensional schematic diagram of the chamfered slide table of this utility model;

[0026] Figure 4 This is a three-dimensional schematic diagram of the feeding slide of this utility model;

[0027] Figure 5 This is a three-dimensional schematic diagram of the fixture inside the feeding slide of this utility model;

[0028] Figure 6 This is a three-dimensional schematic diagram of the fixture of this utility model;

[0029] Figure 7This is a three-dimensional schematic diagram of the internal adjustment structure of the fixture of this utility model.

[0030] In the diagram: 1. Workbench; 2. First chamfering section; 201. Chamfering slide rail; 202. Chamfering slide table; 203. First fixing plate; 204. Motor; 205. Motor mounting bracket; 206. Tool holder; 207. Chamfering tool; 208. First pulley; 209. Second pulley; 210. First hydraulic cylinder; 3. Feeding section; 301. Feeding slide rail; 302. Feeding slide table; 303. Second fixing plate; 304. Second hydraulic cylinder; 4. Second chamfering section; 5. Fixture; 501. Mounting plate; 502. Slide groove; 503. Limiting plate; 6. Central groove; 7. Adjusting plate; 701. Extension plate; 702. Clamping plate; 8. Roller; 801. Mounting seat; 802. Slide groove; 9. Knob; 10. Adjusting screw; 11. Adjusting guide rod. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Example:

[0033] Please see Figures 1 to 7 This utility model provides a technical solution:

[0034] A chamfering mechanism for aluminum alloy structural components for rail transit includes a worktable 1. A first chamfering part 2 and a second chamfering part 4 are symmetrically distributed and fixedly connected to the surface of the worktable 1. A central groove 6 is reserved between the two, and a feeding part 3 is provided in the central groove 6.

[0035] The feeding section 3 is used to transfer the workpiece to the processing position. It mainly consists of a feeding slide rail 301, a feeding slide table 302, a drive assembly, and a guide assembly. The feeding slide rail 301 is fixedly connected to the upper end face of the feeding section 3, and the feeding slide table 302 is slidably connected to the feeding slide rail 301. The two slide smoothly through the cooperation of the slide rail and the slider. The upper end face of the feeding slide table 302 is fixedly connected to the mounting plate 501 on the side of the fixture 5 by bolts, thereby driving the fixture 5 and the workpiece to move synchronously.

[0036] A suitable slider is provided between the feeding slide rail 301 and the feeding slide table 302. The lower end face of the slider is in close contact with the track surface of the feeding slide rail 301, and the upper end face is fixedly connected to the bottom of the feeding slide table 302 by bolts, forming a stable sliding fit structure.

[0037] like Figure 4 As shown, a second fixing plate 303 is bolted to the rear end face of the feeding slide rail 301. A second hydraulic cylinder 304 is mounted on the rear end face of the second fixing plate 303, and its piston rod c passes through the central through hole of the second fixing plate 303 and is connected to the rear end of the feeding slide table 302. When the piston rod c of the second hydraulic cylinder 304 extends or retracts, it can directly push the feeding slide table 302 to move back and forth along the feeding slide rail 301, realizing the feeding and unloading of the workpiece.

[0038] Meanwhile, to prevent the feeding slide 302 from shifting or shaking during movement, two parallel guide rods d are fixedly connected to both sides of the rear end face of the feeding slide 302. The guide rods d pass through the through holes on both sides of the second fixed plate 303 to form a stable guiding structure, ensuring that the feeding slide 302 always moves accurately along a straight line.

[0039] It should be noted that the extension and retraction stroke of the piston rod c of the second hydraulic cylinder 304 is preset to a maximum extent that it can only push the feeding slide 302 to the loading area f at the front end of the feeding slide rail 301. This area is located on the outer front end of the central groove 6, and is not obstructed by the first chamfered portion 2 and the second chamfered portion 4 symmetrically arranged on both sides, forming an open operating space. This ensures that the operator can place the workpiece into the fixture 5 without obstruction during loading.

[0040] The length of the guide rod d is precisely designed to cover the entire stroke of the feeding slide 302 from its initial position to the loading area f. When the feeding slide 302 moves to the loading area f under the drive of the second hydraulic cylinder 304, the end of the guide rod d away from the feeding slide 302 can still maintain its position through the through holes on both sides of the second fixed plate 303, and will not disengage from the through holes due to the forward movement of the slide.

[0041] The fixture 5 is connected to the feeding slide 302 by bolts through four mounting plates 501 connected on both sides. Adjustment plates 7 are symmetrically arranged on both sides of the internal cavity of the fixture 5. The adjustment plates 7 are installed on the adjustment structure. An extension plate 701 is vertically fixed to the upper end of the adjustment plate 7. A clamping plate 702 is detachably connected to the inner side of the extension plate 701 by bolts. The clamping plate 702 is in direct contact with the workpiece. By replacing the clamping plate 702 with different specifications and shapes, it can be adapted to various aluminum alloy structural parts.

[0042] As the component that directly contacts the workpiece, the shape of clamping plate 702 can be customized and changed according to the specific shape of the aluminum alloy structural parts, such as the edge contours and surface curvature. For example, a flat clamping plate 702 can be used for right-angle structural parts, while an arc-shaped clamping plate 702 can be adapted for curved contour parts. By flexibly adjusting the shape of clamping plate 702, a tight fit with the workpiece surface is ensured, effectively enhancing the adaptability of the fixture 5 to structural parts of different shapes. Furthermore, the detachable connection is achieved through bolts, eliminating the need for complex tools and making operation quick and efficient.

[0043] The bottom of the adjusting plate 7 is symmetrically fixedly connected to mounting bases 801 on both sides. Rollers 8 are rotatably connected to the mounting bases 801 via bearings and shafts. Correspondingly, a groove 802 extending along the moving direction of the adjusting plate 7 is opened on the inner bottom of the clamp 5. The wheel surface of the roller 8 is in close contact with the inner wall of the groove 802. When the adjusting plate 7 moves, the roller 8 rolls along the inside of the groove 802, converting the sliding friction between the adjusting plate 7 and the bottom of the clamp 5 into rolling friction, reducing the resistance during the adjustment process, and making the adjustment operation more effortless and smooth.

[0044] It should be noted that the number of mounting seats 801 and rollers 8 on both sides of the bottom of the adjusting plate 7 is preferably two sets, symmetrically arranged at both ends of the bottom of the adjusting plate 7. The preferred material for the rollers 8 is high-strength wear-resistant cast iron or polyurethane. These materials not only have excellent wear resistance and can withstand rolling friction for a long time without being easily worn, but also have a moderate surface friction coefficient, which can form a stable contact in the groove 802, play an anti-slip role, and prevent the adjusting plate 7 from slipping when it moves.

[0045] In this embodiment, as Figure 7 As shown, the adjustment structure includes an adjusting screw 10. The two ends of the adjusting screw 10 are rotatably connected to the inner wall of the clamp 5 via bearings. The screw has symmetrical, opposite threads on both sides (left-hand thread on the left, right-hand thread on the right). One end of the adjusting screw 10 extends to the outside of the clamp 5 and is fixedly connected to a knob 9. When the knob 9 is rotated, the adjusting screw 10 rotates synchronously. Because the threads on both sides are in opposite directions, the two adjusting plates 7 passing through the screw will move in opposite directions under the force of the threads, thereby quickly adjusting the spacing.

[0046] Two parallel adjusting guide rods 11 are also fixedly connected to the inside of the clamp 5. The two ends of the adjusting rods are fixedly connected to the inner walls of the two sides of the clamp 5 respectively. The adjusting guide rods 11 pass through the corresponding through holes of the two adjusting plates 7 respectively, forming a guiding constraint to prevent the adjusting plates 7 from deflecting during the movement.

[0047] Meanwhile, the extension plate 701 at the top of the adjusting plate 7 passes through the slide groove 502 opened at the top of the clamp 5. The middle of the slide groove 502 is integrally formed with a limit plate 503. When the adjusting plate 7 moves to the limit position, the extension plate 701 will contact the limit plate 503 to prevent the adjusting plate 7 and the extension plate 701 from overstepping due to excessive movement, thus ensuring the safety of the adjusting structure.

[0048] In this embodiment, after the equipment is started, the second hydraulic cylinder 304 receives a command, and its piston rod c extends outward, pushing the feeding slide 302 forward along the feeding slide rail 301 under a preset stroke limit until the feeding slide 302 reaches the front loading area f. At this time, the loading area remains open because there are no left or right chamfered corners to block it, and the operator can operate directly to move the rail transit aluminum alloy structural parts to be processed onto the fixture 5, and then rotate the knob 9 on the outside of the fixture 5. The knob 9 drives the adjusting screw 10 to rotate. Since the threads on both sides of the screw are opposite, the adjusting plates 7 on both sides move towards each other under the action of the threads, and the clamping plate 702 on the inner side of the top extension plate 701 moves closer to the workpiece synchronously with the adjusting plate 7. The operator observes the contact state between the workpiece and the clamping plate 702. After the clamping plate 702 is in close contact with the surface of the workpiece, the operator stops rotating the knob 9 to complete the clamping and fixing of the workpiece. The roller 8 at the bottom of the adjusting plate 7 rolls along the roller groove 802 to reduce the adjustment resistance and ensure that the clamping action is smooth and effortless. After the workpiece is fixed, the piston rod c of the second hydraulic cylinder 304 begins to retract at a preset fixed rate, pulling the feeding slide 302 backward along the feeding slide rail 301. When the feeding slide 302 carries the workpiece past the groove 6 in the middle of the worktable 1, the first chamfering part 2 and the second chamfering part 4 on both sides start synchronously, and the chamfering tool 207 rotates at high speed under the drive of the motor 204. As the feeding slide 302 continues to move at a fixed rate, the edges and corners of the workpiece form relative motion with the rotating tool, completing the uniform chamfering and grinding process. After the processing is completed, the piston rod c continues to retract, bringing the feeding slide 302 back to its initial position. The operator rotates the knob 9 in the opposite direction to release the clamping plate 702, and the processed workpiece can be removed, completing one chamfering process.

[0049] Specifically, the number of the slide groove 502 on the top of the clamp 5 and the extension plate 701 on the top of the adjusting plate 7 is preferably three.

[0050] The left side of the feeding section 3 is the first chamfering section 2, and the right side is the second chamfering section 4. The two are arranged in opposite directions with the central axis of the groove 6 in the middle of the worktable 1 as the center of symmetry. They can simultaneously chamfer the corners of both sides of the workpiece. The structures of the two chamfering sections are exactly the same. Taking the first chamfering section 2 as an example, it mainly includes a chamfering slide rail 201 fixed on the upper end surface of the first chamfering section 2, and a chamfering slide 202 slidably connected to the chamfering slide rail 201. A tool holder 206 is fixedly connected above the chamfering slide 202. The front end of the tool holder 206 is connected to the chamfering tool 207 and the tool shaft by a thread. The threaded structure makes it easy to change tools of different specifications according to processing requirements.

[0051] The upper end of the tool holder 206 is fixedly connected to a drive motor 204 via a motor mounting bracket 205. The output end of the motor 204 is connected to a second pulley 209. The rear end of the chamfering tool 207's cutter shaft is connected to a first pulley 208. A transmission belt e (e.g., ...) is fitted between the first pulley 208 and the second pulley 209. Figure 3 (As shown). When the motor 204 starts, the power is transmitted to the cutter shaft through two pulleys and the transmission belt e, which drives the chamfering cutter 207 to rotate at high speed, thus realizing the cutting action.

[0052] The end of the chamfered slide rail 201 is fixedly connected to a first fixing plate 203 by bolts, and a first hydraulic cylinder 210 is installed on the rear end face of the first fixing plate 203 (e.g., Figure 3 As shown in the diagram, its piston rod a passes through the first fixed plate 203 and connects to the rear end face of the chamfering slide 202. Through the extension and retraction of the first hydraulic cylinder 210, the chamfering slide 202 can be moved along the chamfering slide rail 201, adjusting the machining distance between the tool and the workpiece. Simultaneously, guide rods b are also fixedly connected to both sides of the rear end face of the chamfering slide 202. These guide rods b pass through through holes on both sides of the first fixed plate 203, ensuring the stability of the chamfering slide 202 during movement and preventing tool deviation during cutting.

[0053] It should be noted that when the first hydraulic cylinder 210 is activated, its piston rod a will extend or retract axially, directly pushing or pulling the chamfering slide 202 through a rigid connection with the rear end face of the chamfering slide 202. This causes the chamfering slide 202 to move linearly along the chamfering slide rail 201. When extended, it drives the chamfering tool 207 closer to the workpiece for chamfering; when retracted, it drives the tool away from the workpiece to complete the tool retraction. The extension and retraction stroke of the piston rod a is set so that the maximum extension only moves the chamfering slide 202 to the machining position at the front end of the chamfering slide rail 201, ensuring that the tool and workpiece maintain the optimal machining distance and avoiding damage to the tool or workpiece due to overfeed. Meanwhile, the length of the guide rod b is adapted to the full-stroke movement requirements of the chamfering slide 202. Even if the chamfering slide 202 moves to the extreme machining position at the front end of the slide rail, the end of the guide rod b away from the chamfering slide 202 can still stably pass through the through holes on both sides of the first fixed plate 203 without detaching. It always provides guiding constraints for the chamfering slide 202, ensuring that the tool always moves accurately along the preset trajectory during the cutting process.

[0054] The second chamfered part 4 has the same structure as the first chamfered part 2 and is symmetrical in the opposite direction, such as Figure 2 As shown.

[0055] In this embodiment, the operator can control the hydraulic cylinders of the first chamfering section 2 and the second chamfering section 4 respectively. By adjusting the extension length of the piston rod a, the extension distance of the chamfering slide 202 along the chamfering slide rail 201 can be changed. If different depths of chamfering are required on both sides of the workpiece, the extension and retraction of the first hydraulic cylinder 210 on one side can be adjusted separately, so that the chamfering slide 202 on the corresponding side extends deeper or shallower, thereby changing the contact depth between the chamfering tool 207 and the edge of the workpiece. If the chamfering depth on both sides needs to be the same, the piston rods a on both sides can be adjusted synchronously to the same extension amount. By adjusting the two sides independently, it can be ensured that the extension depth of the chamfering slides 202 on both sides can be flexibly set according to the processing requirements to meet the chamfering depth requirements of different workpieces.

[0056] In this embodiment, the motor 204 driving the chamfering tool 207 is preferably a three-phase asynchronous motor, and the model can be YE2 series (such as YE2-90S-4). The first hydraulic cylinder 210 and the second hydraulic cylinder 304 are preferably single piston rod double-acting hydraulic cylinders, and the model can be MOB series (such as MOB40×100).

[0057] In this embodiment, the entire process of feeding, clamping, and chamfering is precisely controlled by the PLC control system, realizing automated regulation of each execution component. Each structure is also equipped with a manual control button. The PLC can precisely adjust the input frequency of the motor 204 through the frequency converter module, thereby stabilizing the speed of the motor 204. For the first hydraulic cylinder 210 and the second hydraulic cylinder 304, the control system precisely controls the oil inlet and return volume of the hydraulic cylinder through the electromagnetic reversing valve and the flow control valve, thereby precisely adjusting the extension rate and extension amount of the piston rod.

[0058] In use, the equipment is first started via PLC control system or manual button. The second hydraulic cylinder 304 pushes the feeding slide 302 to the loading area f. The operator places the aluminum alloy structural part to be processed into the fixture 5 and rotates the knob 9 to drive the clamping plate 702 to clamp the workpiece through the adjusting screw 10. Then, the control button is operated to retract the second hydraulic cylinder 304, which moves the workpiece along the feeding slide 301. At the same time, the extension depth of the chamfering slides 202 on both sides is adjusted by the first hydraulic cylinder 210 according to the chamfering requirements. The motor 204 is started to make the chamfering cutter 207 rotate at high speed. When the workpiece passes through the central groove 6 at a fixed speed, the rotating cutter performs simultaneous chamfering on the two sides. After the processing is completed, the feeding slide 302 returns to the initial position. The knob 9 is rotated in the opposite direction to release the clamping plate 702 and the workpiece is removed, thus completing one chamfering operation.

[0059] All other parts of this utility model not described herein are the same as existing technologies, or are known technologies, or can be implemented using existing technologies, and will not be described in detail here.

[0060] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A chamfering mechanism for aluminum alloy structural components in rail transit, characterized in that, include: The clamp (5) has a mounting plate (501) fixedly connected to its side. The clamp (5) has symmetrical adjustment plates (7) on both sides inside. An extension plate (701) is fixedly connected to the adjustment plate (7). A clamping plate (702) is fixedly connected to the inner side of the extension plate (701) by bolts. The distance between the two adjustment plates (7) can be adjusted by adjusting the structure. The bottom sides of the adjusting plate (7) are fixedly connected to the mounting base (801), and the mounting base (801) is rotatably connected to the roller (8). The wheel surface of the roller (8) is in contact with the inner wall of the groove (802). When the adjusting plate (7) moves, the roller (8) rolls along the inside of the groove (802), converting the sliding friction between the adjusting plate (7) and the bottom of the clamp (5) into rolling friction, thereby reducing the resistance during the movement of the adjusting plate (7). A workbench (1) is fixedly connected to the workbench (1). The chamfered part includes a first chamfered part (2) and a second chamfered part (4). A central groove (6) is provided between the chamfered parts. The fixture (5) is installed in the central groove (6). The chamfered part is used to simultaneously chamfer the two sides of the structural parts.

2. The chamfering mechanism for aluminum alloy structural components in rail transit according to claim 1, characterized in that: The adjustment structure includes an adjustment screw (10) and an adjustment guide rod (11). The two ends of the adjustment screw (10) are rotatably connected to the two sides of the inner wall of the clamp (5) through bearings. The two sides of the adjustment screw (10) are provided with symmetrical and opposite threads. A knob (9) is fixedly connected to the outer side of one end of the adjustment screw (10). The adjustment guide rod (11) is fixedly connected to the inner side of the clamp (5). The adjustment guide rod (11) passes through two adjustment plates (7) respectively. An extension plate (701) is fixedly connected to the top of the adjustment plate (7). The extension plate (701) passes through the slide groove (502) at the top of the clamp (5). A limit plate (503) is integrally formed in the middle of the slide groove (502) to prevent the extension plate (701) and the adjustment plate (7) from overstepping their limits.

3. The chamfering mechanism for aluminum alloy structural components in rail transit according to claim 1, characterized in that: The bottom inner side of the clamp (5) is provided with a groove (802) extending along the moving direction of the adjusting plate (7) at the position of the roller (8).

4. The chamfering mechanism for aluminum alloy structural components in rail transit according to claim 1, characterized in that: The clamp (5) is fixedly connected to the upper end face of the feeding slide (302) via the mounting plate (501), and the feeding slide (302) is slidably connected to the feeding slide rail (301) on the feeding part (3).

5. The chamfering mechanism for aluminum alloy structural components in rail transit according to claim 4, characterized in that: The rear end face of the feeding slide rail (301) is fixedly connected to a second fixing plate (303) by bolts. The rear end face of the second fixing plate (303) is fixedly connected to a second hydraulic cylinder (304). The piston rod of the second hydraulic cylinder (304) passes through the second fixing plate (303) and is connected to the feeding slide (302). Guide rods are also fixedly connected to both sides of the rear end face of the feeding slide (302). The guide rods pass through the through holes on both sides of the second fixing plate (303).

6. The chamfering mechanism for aluminum alloy structural components in rail transit according to claim 1, characterized in that: The first chamfered part (2) includes a chamfered slide rail (201), which is fixedly connected to the upper end face of the first chamfered part (2). A chamfered slide table (202) is slidably connected on the chamfered slide rail (201). A tool holder (206) is fixedly connected above the chamfered slide table (202). The front end of the tool holder (206) holds a chamfered tool (207).

7. The chamfering mechanism for aluminum alloy structural components in rail transit according to claim 6, characterized in that: The upper end of the tool holder (206) is fixedly connected to a motor (204) via a motor mounting bracket (205). The output end of the motor (204) is connected to a second pulley (209). The rear end of the chamfering tool (207) is connected to a first pulley (208). A transmission belt is provided between the first pulley (208) and the second pulley (209).

8. The chamfering mechanism for aluminum alloy structural components in rail transit according to claim 6, characterized in that: The end of the chamfered slide rail (201) is fixedly connected to a first fixing plate (203) by bolts. The rear end face of the first fixing plate (203) is fixedly connected to a first hydraulic cylinder (210). The piston rod of the first hydraulic cylinder (210) passes through the first fixing plate (203) and is connected to the chamfered slide (202). Guide rods are also fixedly connected to both sides of the rear end face of the chamfered slide (202). The guide rods pass through the through holes on both sides of the first fixing plate (203).

9. The chamfering mechanism for aluminum alloy structural components in rail transit according to claim 1, characterized in that: The second chamfered part (4) has the same structure as the first chamfered part (2), including a chamfered slide rail (201), a chamfered slide table (202), a tool holder (206), a chamfered tool (207), a motor (204), a motor mounting bracket (205), a first pulley (208), a second pulley (209), a transmission belt, a first fixing plate (203), a first hydraulic cylinder (210), and a guide rod. The second chamfered part (4) and the first chamfered part (2) are arranged in opposite directions with the central axis of the central groove (6) as the center of symmetry.

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