Coreless grinder multi-station grinding mechanism

Abstract

The utility model relates to coreless grinding machine technical field, and disclose a kind of coreless grinding machine multi-station grinding mechanism, including grinding assembly and support platform, support grinding assembly is carried out by support platform, the grinding assembly is provided with multiple groups and is distributed in the upper portion of support platform in circumferential array, and multiple grinding assemblies form multi-station grinding mechanism by multiple groups.The coreless grinding machine multi-station grinding mechanism, by adopting the grinding assembly of multiple circumferential array distribution constitutes multi-station synchronous processing system, compared with traditional single-station equipment, the processing efficiency is greatly improved;Secondly, the innovative multi-station feeding assembly is cooperated with the rotation of stepping motor drive rotation by the synergistic effect of rotating support seat, universal bearing disc and guide driving plate, so that mechanical gripper can accurately position each grinding station, perfectly solve the problem of multi-station automatic feeding, and the unique discharge mechanism design makes the roller seat can be telescopic adjusted in telescopic slot, avoid contact workpiece when clamping, and make friction roller contact workpiece when feeding.

Description

Technical Field

[0001] This utility model relates to the field of centerless grinding machine technology, specifically to a multi-station grinding mechanism for a centerless grinding machine. Background Technology

[0002] A centerless grinder is a high-efficiency precision machining equipment, mainly used for the external grinding of cylindrical workpieces such as bearings and shafts. Its core feature is that it eliminates the need for a center hole for positioning, achieving workpiece rotation and grinding through the coordinated action of the grinding wheel, guide wheel, and support plate. Traditional centerless grinders employ a single-station design, processing only one workpiece at a time. While this meets basic machining needs, its efficiency is limited in mass production, making it difficult to match the high-capacity and low-energy-consumption requirements of modern manufacturing.

[0003] To improve production efficiency, multi-station grinding mechanisms have emerged. These mechanisms utilize multiple grinding units to achieve parallel workpiece processing, theoretically increasing production capacity several times that of a single-station system. However, the multi-station design places higher demands on the feeding system: it must simultaneously meet the requirements of precise material feeding across multiple stations, automatic workpiece allocation, and efficient connection.

[0004] In existing technologies, single-station grinding machines, such as those described in patent CN217832959U, are typically equipped with independent feeders, which achieve unidirectional conveying through hoppers, slides, and guide wheels. However, their structure is only suitable for a single feed inlet and cannot be extended to multi-station scenarios. If multiple feeders of this structure are connected in parallel, it will not only occupy space and increase costs, but also lead to an increased failure rate due to the complexity of the mechanism.

[0005] Furthermore, the feeding mechanism of this scheme transports the workpieces uniformly via the slide, and cannot automatically allocate them to the corresponding grinding station according to size differences, making it difficult to achieve mixed-line processing of workpieces of multiple specifications.

[0006] Therefore, we propose a multi-station grinding mechanism for a centerless grinding machine to solve the problems mentioned above. Utility Model Content

[0007] This utility model provides a multi-station grinding mechanism for a centerless grinder, which can solve the problem that existing single-station grinders are usually equipped with an independent feeder, which achieves unidirectional conveying through a hopper, slide rail and guide wheel, and cannot be applied to multi-station grinding mechanisms.

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0009] A multi-station grinding mechanism for a centerless grinding machine includes grinding components and a support table. The grinding components are arranged in multiple sets and distributed in a circumferential array on the upper part of the support table. A frame-type support frame is provided on the outer side of the support table, and a multi-station feeding component is installed in the middle of the frame-type support frame.

[0010] The multi-station feeding assembly includes a rotating support base, a universal bearing plate is installed at the lower end of the rotating support base, a guide drive plate is installed at the end of the universal bearing plate away from the rotating support base, a stepper motor is installed inside the rotating support base, the shaft of the stepper motor is fixedly connected to the upper part of the guide drive plate, an electric telescopic rod is installed on the side of the guide drive plate away from the universal bearing plate, and a mechanical gripper that can automatically discharge materials is installed at the lower end of the electric telescopic rod.

[0011] Preferably, the guide drive plate has a groove on the side near the electric telescopic rod, and a threaded rod is rotatably connected inside the groove. A servo motor is fixedly installed at one end of the guide drive plate, and the shaft of the servo motor is fixedly connected to the threaded rod. A sliding seat is threadedly connected to the outside of the threaded rod, and the sliding seat slides in cooperation with the inside of the groove.

[0012] Preferably, the mechanical gripper capable of automatic material discharge includes an adjusting base and two grippers. The two grippers are symmetrically arranged on both sides of the adjusting base, with their upper ends slidably connected to the interior of the adjusting base, and the lower ends of the grippers are provided with arc-shaped clamping grooves.

[0013] Preferably, a bidirectional screw is installed inside the adjusting seat. The bidirectional screw consists of two symmetrical screw sections fixedly connected. A stepper motor that drives the bidirectional screw to rotate is installed at one end of the adjusting seat.

[0014] Preferably, a distance sensor is installed between the two grippers to monitor the distance between them.

[0015] Preferably, the inner side of the gripper is provided with evenly distributed balls, and the middle of the gripper is provided with a discharge drive component.

[0016] Preferably, the discharge drive assembly includes a friction roller and a roller base. The roller base is U-shaped, and the friction roller is rotatably connected inside the roller base. A drive motor is installed on the roller base, and the drive motor drives the friction roller to rotate.

[0017] Preferably, the gripper has a telescopic groove in the middle, the roller seat is slidably disposed inside the telescopic groove, a miniature telescopic rod is installed on the gripper near the outer side of the telescopic groove, the miniature telescopic rod is fixedly connected to the outer side of the roller seat, and a pressure sensor is installed between the miniature telescopic rod and the roller seat.

[0018] Preferably, the grinding assembly includes a first wheel seat and a second wheel seat, with a support plate between the first wheel seat and the second wheel seat. A grinding wheel is rotatably connected inside the first wheel seat, and a working motor for driving the grinding wheel to rotate is fixedly installed on the first wheel seat. A guide wheel is rotatably connected inside the second wheel seat. The first wheel seat is slidably connected to a support platform, and a fixed block is provided on the support platform. An electric push rod is installed on the fixed block.

[0019] Preferably, a conveying platform is provided below the support platform. The conveying platform includes a platform base, a conveyor belt is installed on the upper part of the platform base, and the surface of the conveyor belt is uniformly provided with grooves for placing workpieces. A sensing sensor for workpiece position detection is installed on the platform base below the grippers.

[0020] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0021] This invention employs a multi-station synchronous processing system composed of multiple sets of circumferentially arrayed grinding components, significantly improving processing efficiency compared to traditional single-station equipment. Secondly, the innovative multi-station loading component, through the synergistic action of a rotating support base, universal bearing plate, and guide drive plate, coupled with stepper motor-driven rotation, enables the mechanical gripper to precisely position each grinding station, perfectly solving the problem of automatic multi-station loading. The mechanical gripper uses a bidirectional screw to drive symmetrical jaws, working with a distance sensor to achieve automatic workpiece diameter recognition and adaptive clamping. Inner ball bearings on the jaws ensure clamping stability, while the friction rollers of the discharge drive component achieve automatic and precise discharge. A unique discharge mechanism design allows the roller seat to extend and retract within a telescopic groove. During clamping, it retracts to avoid contact with the workpiece; during loading, it extends to allow the friction rollers to contact the workpiece. A miniature electric telescopic rod and pressure sensor precisely control the discharge force. The guide drive system uses a sliding groove, threaded rod, and servo motor to drive the sliding seat movement, combined with the mechanical gripper's angular rotation and the extension and retraction of the electric telescopic rod, ensuring precise positioning of the mechanical gripper during loading. The use of a mechanical gripper that can automatically unload materials enables shared material feeding across multiple workstations, reducing equipment costs and improving space utilization. This highly automated mechanism can automatically detect the workpiece diameter and allocate it to the corresponding grinding components, significantly reducing manual intervention. While ensuring stable processing quality, it also improves production efficiency, solving the technical problems of low processing efficiency and difficult material feeding in traditional centerless grinding machines. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall external structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the mechanical gripper structure of this utility model;

[0024] Figure 3 This is a schematic diagram of the unfolded structure of the mechanical gripper of this utility model;

[0025] Figure 4 This is a schematic diagram of the grinding assembly structure of this utility model.

[0026] The components include: 1. Support platform; 3. Frame-type support frame; 4. Rotating support seat; 5. Universal bearing disc; 6. Guide drive plate; 8. Electric telescopic rod; 10. Slide groove; 11. Threaded rod; 12. Servo motor; 13. Sliding seat; 14. Adjusting seat; 15. Gripper; 16. Arc-shaped clamping groove; 17. Bidirectional screw; 18. Distance sensor; 19. Ball bearing; 21. Friction roller; 22. Roller seat; 23. Drive motor; 24. Telescopic groove; 25. Miniature telescopic rod; 27. First wheel seat; 28. Second wheel seat; 29. ​​Support plate; 30. Grinding wheel; 31. Working motor; 32. Guide wheel; 33. Fixing block; 34. Electric push rod; 35. Conveying platform; 36. Platform seat; 37. Conveyor belt; 38. Belt groove; 39. Induction sensor. Detailed Implementation

[0027] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.

[0028] Example 1:

[0029] Please see Figure 1-4 This utility model provides a technical solution:

[0030] A multi-station grinding mechanism for a centerless grinding machine includes grinding components and a support table 1. The grinding components are supported by the support table 1. Multiple sets of grinding components are arranged in a circumferential array on the upper part of the support table 1, forming a multi-station grinding mechanism.

[0031] A frame-type support frame 3 is provided on the outside of the support platform 1. A multi-station feeding component is installed in the middle of the frame-type support frame 3. The multi-station feeding component is supported from above by the frame-type support frame 3. The multi-station feeding component is located between multiple grinding components, which facilitates feeding.

[0032] The multi-station loading assembly includes a rotating support base 4. A universal bearing plate 5 is mounted on the lower end of the rotating support base 4. A guide drive plate 6 is mounted on the end of the universal bearing plate 5 furthest from the rotating support base 4. The guide drive plate 6 is rotatably connected to the rotating support base 4 via the universal bearing plate 5, allowing the guide drive plate 6 to rotate stably. A stepper motor is installed inside the rotating support base 4. The shaft of the stepper motor is fixedly connected to the upper part of the guide drive plate 6. The stepper motor is fixedly connected to the rotating support base 4, and its shaft passes through the universal bearing plate 5 and is fixedly connected to the guide drive plate 6, thus allowing the stepper motor to rotate and drive the guide drive plate 6 to rotate stably. An absolute encoder is mounted on the shaft of the stepper motor for monitoring the rotation angle of the stepper motor.

[0033] An electric telescopic rod 8 is installed on the side of the guide drive plate 6 away from the universal bearing disc 5, and a mechanical gripper that can automatically discharge materials is installed at the lower end of the electric telescopic rod 8.

[0034] In the above scheme, the rotation of the guide drive plate 6 drives the electric telescopic rod 8 and the mechanical gripper to rotate. When the workpiece of the mechanical gripper and the feed port of the grinding assembly are on the same axis, the electric telescopic rod 8 is driven to slide linearly along the direction of the guide drive plate 6 through the guide drive plate 6, so that the mechanical gripper is closer to the feed port of the grinding assembly for easy loading. The above scheme can load from the side of the grinding assembly, which is efficient and fast, or load from the top of the grinding assembly, so that longer workpieces can be completely inserted into the grinding assembly for grinding. Since the mechanical gripper is located in the middle of multiple circumferentially distributed grinding assemblies, the rotation of the mechanical gripper can match the feed ports of multiple grinding assemblies.

[0035] The machine uses a mechanical gripper that can automatically feed materials to multiple grinding components, reducing the number of feeding components, lowering equipment costs, and maintaining efficient material feeding. It is easy to operate, can automatically feed materials, and ensures processing efficiency through the multi-station grinding mechanism of the centerless grinder.

[0036] The automatic material discharge mechanical gripper includes an adjusting base 14 and two grippers 15. The two grippers 15 are symmetrically arranged on both sides of the adjusting base 14, with their upper ends slidably connected to the interior of the adjusting base 14. The lower ends of the grippers 15 are provided with arc-shaped clamping grooves 16. A bidirectional screw 17 is installed inside the adjusting base 14. The bidirectional screw 17 is composed of two symmetrical screw sections fixedly connected. A stepper motor that drives the bidirectional screw 17 to rotate is installed at one end of the adjusting base 14.

[0037] The workpiece is gripped by two jaws 15 on the adjusting seat 14, and the workpiece is locked and fixed by the arc-shaped clamping grooves 16 of the two jaws 15. It is suitable for round workpieces, has good stability and prevents them from falling. The bidirectional screw 17 is driven to rotate by a stepper motor, so that the two symmetrically arranged jaws 15 move closer or further apart.

[0038] Furthermore, a distance sensor 18 is installed between the two grippers 15 to monitor the distance between them. The diameter of the circular workpiece can be determined by the distance between the two grippers 15. Multiple grinding components can be set to process workpieces of different diameters. By detecting the diameter of the workpiece, the mechanical gripper automatically assigns it to the corresponding grinding component for processing, making the processing more convenient and intelligent, and avoiding the problems of low efficiency and time consumption of manual screening.

[0039] The inner side of the gripper 15 is provided with evenly distributed balls 19, and the middle of the gripper 15 is provided with a discharge drive component.

[0040] The workpiece can be clamped by the evenly distributed balls 19 in the arc-shaped clamping groove 16 of the gripper 15. At the same time, the clamped workpiece can be pushed out by the discharge drive component for feeding. The balls 19 rotate as they slide, so as to achieve stable feeding of the workpiece.

[0041] Furthermore, the discharge drive assembly includes a friction roller 21 and a roller seat 22. The roller seat 22 is U-shaped, and the friction roller 21 is rotatably connected inside the roller seat 22. A drive motor 23 is installed on the roller seat 22, and the drive motor 23 drives the friction roller 21 to rotate.

[0042] The friction roller 21 inside the friction roller 21 seat is rotated by the drive motor 23. The rotating friction roller 21 rubs against the surface of the workpiece, forming an axial pushing force, thereby pushing the workpiece out of the mechanical gripper and into the grinding station for grinding.

[0043] The gripper 15 has a telescopic groove 24 in the middle, and the roller seat 22 is slidably disposed inside the telescopic groove 24. A miniature telescopic rod 25 is installed on the gripper 15 near the outer side of the telescopic groove 24. The miniature telescopic rod 25 is fixedly connected to the outer side of the roller seat 22, and a pressure sensor is installed between the miniature telescopic rod 25 and the roller seat 22.

[0044] In the above scheme, the roller seat 22 can be extended and retracted within the telescopic groove 24 in the middle of the gripper 15 to adapt to the clamping of workpieces of different diameters. When the mechanical gripper clamps the workpiece, the roller seat 22 retracts into the telescopic groove 24, and the friction roller 21 does not contact the workpiece. When the workpiece is guided to the grinding assembly, the friction roller 21 contacts the workpiece.

[0045] By installing a pressure sensor between the miniature electric telescopic rod 8 and the roller seat 22, the pressure between the friction roller 21 inside the roller seat 22 and the workpiece surface can be detected, which helps the friction roller 21 to stably drive the workpiece out.

[0046] Furthermore, the guide drive plate 6 has a groove 10 on the side near the electric telescopic rod 8. A threaded rod 11 is rotatably connected inside the groove 10. A servo motor 12 is fixedly mounted on one end of the guide drive plate 6. The shaft of the servo motor 12 is fixedly connected to the threaded rod 11. A sliding seat 13 is threadedly connected to the outside of the threaded rod 11, and the sliding seat 13 slides in contact with the inside of the groove 10. The servo motor 12 drives the threaded rod 11, which in turn drives the sliding seat 13 to move within the groove 10, thereby causing the electric telescopic rod 8 connected to the sliding seat 13 to move linearly.

[0047] Example 2:

[0048] Please see Figure 2-4Furthermore, in conjunction with Embodiment 1, the grinding assembly includes a first wheel seat 27 and a second wheel seat 28. A support plate 29 is provided between the first wheel seat 27 and the second wheel seat 28. A grinding wheel 30 is rotatably connected inside the first wheel seat 27. A working motor 31 for driving the grinding wheel 30 to rotate is fixedly installed on the first wheel seat 27. A guide wheel 32 is rotatably connected inside the second wheel seat 28. The first wheel seat 27 is slidably connected to a support platform 1. A fixing block 33 is provided on the support platform 1. An electric push rod 34 is installed on the fixing block 33.

[0049] In the above scheme, the bottom of the workpiece is supported by the support plate 29, and the grinding wheel 30 and guide wheel 32 clamp the two sides of the workpiece, keeping them in contact and allowing the workpiece to rotate. The workpiece is rotated by the rotation of the grinding wheel 30, and the workpiece is ground and polished at the same time. The first wheel seat 27 is pushed to slide on the support table 1 by the electric push rod 34, thereby adjusting the position of the grinding wheel 30 on the first wheel seat 27 and adjusting the distance between the grinding wheel 30 and the guide wheel 32, so as to achieve grinding of workpieces of different diameters.

[0050] The conveying platform 35 includes a platform base 36, a conveyor belt 37 is mounted on the upper part of the platform base 36, and the surface of the conveyor belt 37 is uniformly provided with grooves 38 for placing workpieces. A sensing sensor 39 for workpiece position detection is installed on the platform base 36 below the gripper 15.

[0051] In the above scheme, the cylindrical workpiece is conveyed by the groove 38 on the conveyor belt 37, and the position of the workpiece is monitored by the sensing sensor 39 located below the gripper 15. When the workpiece enters below the gripper 15, the conveyor belt 37 stops, and the mechanical gripper clamps the workpiece.

[0052] The working principle of the multi-station grinding mechanism of the centerless grinder is as follows: The mechanical gripper is mounted on the electric telescopic rod 8 at the lower end of the guide drive plate 6. It includes an adjusting seat 14 and two symmetrically arranged grippers 15. The inner side of the grippers 15 is provided with an arc-shaped clamping groove 16 and a ball bearing 19. The opening and closing is adjusted by the bidirectional screw 17 inside the adjusting seat 14. The bidirectional screw 17 is driven to rotate by a stepper motor, so that the two grippers 15 move closer or further apart synchronously, thereby adapting to the clamping of workpieces of different diameters. A distance sensor 18 is provided between the grippers 15, which can automatically detect the diameter of the workpiece and match the corresponding grinding station. During loading, after the mechanical gripper grabs the workpiece from the conveyor belt 37, the guide drive plate 6 is driven to rotate by the stepper motor, so that the workpiece is aligned with the feed port of the target grinding assembly. Then, the servo motor 12 drives the threaded rod 11 to rotate, which drives the sliding seat 13 to move linearly along the slide groove 10, so that the electric telescopic rod 8 and the mechanical gripper move closer to the grinding assembly. When the workpiece reaches the predetermined position, the discharge drive component in the middle of the gripper 15 is activated: the miniature electric telescopic rod 8 pushes the roller seat 22 outward, causing the friction roller 21 to press against the workpiece surface. The drive motor 23 drives the friction roller 21 to rotate, using friction to smoothly push the workpiece between the grinding wheel 30 and the guide wheel 32 in the grinding station, completing precise feeding. The entire process uses an absolute encoder to monitor the rotation angle and a pressure sensor to regulate the pressure of the friction roller 21, achieving automatic multi-station allocation and stable feeding.

[0053] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A multi-station grinding mechanism for a centerless grinding machine, comprising a grinding assembly and a support table (1), characterized in that: The grinding components are arranged in multiple sets and distributed in a circumferential array on the upper part of the support platform (1). A frame-type support frame (3) is provided on the outside of the support platform (1), and a multi-station feeding component is installed in the middle of the frame-type support frame (3). The multi-station feeding assembly includes a rotating support base (4), a universal bearing plate (5) is installed at the lower end of the rotating support base (4), a guide drive plate (6) is installed at the end of the universal bearing plate (5) away from the rotating support base (4), a stepper motor is installed inside the rotating support base (4), the shaft of the stepper motor is fixedly connected to the upper part of the guide drive plate (6), an electric telescopic rod (8) is installed on the side of the guide drive plate (6) away from the universal bearing plate (5), and a mechanical gripper that can automatically discharge materials is installed at the lower end of the electric telescopic rod (8).

2. The multi-station grinding mechanism for a centerless grinding machine according to claim 1, characterized in that: The guide drive plate (6) has a groove (10) on one side near the electric telescopic rod (8). A threaded rod (11) is rotatably connected inside the groove (10). A servo motor (12) is fixedly installed at one end of the guide drive plate (6). The shaft of the servo motor (12) is fixedly connected to the threaded rod (11). A sliding seat (13) is threadedly connected to the outside of the threaded rod (11). The sliding seat (13) slides in cooperation with the inside of the groove (10).

3. The multi-station grinding mechanism for a centerless grinding machine according to claim 1, characterized in that: The mechanical gripper that can automatically discharge materials includes an adjustment seat (14) and two grippers (15). The two grippers (15) are symmetrically arranged on both sides of the adjustment seat (14), and their upper ends are slidably connected to the inside of the adjustment seat (14). The lower end of the grippers (15) is provided with an arc-shaped clamping groove (16).

4. The multi-station grinding mechanism for a centerless grinding machine according to claim 3, characterized in that: The adjusting seat (14) is equipped with a bidirectional screw (17), which is composed of two symmetrical screws fixedly connected. One end of the adjusting seat (14) is equipped with a stepper motor that drives the bidirectional screw (17) to rotate.

5. The multi-station grinding mechanism for a centerless grinding machine according to claim 4, characterized in that: A distance sensor (18) is installed between the two grippers (15) to monitor the distance between the two grippers (15).

6. The multi-station grinding mechanism for a centerless grinding machine according to claim 5, characterized in that: The inner side of the gripper (15) is provided with evenly distributed balls (19), and the middle of the gripper (15) is provided with a discharge drive component.

7. The multi-station grinding mechanism for a centerless grinding machine according to claim 1, characterized in that: The discharge drive assembly includes a friction roller (21) and a roller seat (22). The roller seat (22) is U-shaped. The friction roller (21) is rotatably connected inside the roller seat (22). A drive motor (23) is installed on the roller seat (22). The drive motor (23) drives the friction roller (21) to rotate.

8. The multi-station grinding mechanism for a centerless grinding machine according to claim 6, characterized in that: A telescopic groove (24) is provided in the middle of the gripper (15). The roller seat (22) is slidably disposed inside the telescopic groove (24). A miniature telescopic rod (25) is installed on the gripper (15) near the outside of the telescopic groove (24). The miniature telescopic rod (25) is fixedly connected to the outside of the roller seat (22). A pressure sensor is installed between the miniature telescopic rod (25) and the roller seat (22).

9. The multi-station grinding mechanism for a centerless grinding machine according to claim 1, characterized in that: The grinding assembly includes a first wheel holder (27) and a second wheel holder (28). A support plate (29) is provided between the first wheel holder (27) and the second wheel holder (28). A grinding wheel (30) is rotatably connected inside the first wheel holder (27). A working motor (31) for driving the grinding wheel (30) to rotate is fixedly installed on the first wheel holder (27). A guide wheel (32) is rotatably connected inside the second wheel holder (28). The first wheel holder (27) is slidably connected to a support platform (1). A fixing block (33) is provided on the support platform (1). An electric push rod (34) is installed on the fixing block (33).

10. The multi-station grinding mechanism for a centerless grinding machine according to claim 1, characterized in that: A conveying platform (35) is provided below the support platform (1). The conveying platform (35) includes a platform base (36). A conveyor belt (37) is installed on the upper part of the platform base (36). The surface of the conveyor belt (37) is uniformly provided with grooves (38) for placing workpieces. A sensing sensor (39) for workpiece position detection is installed on the platform base (36) below the gripper (15).

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