Automatic polishing mechanism for plastic fittings

Abstract

The utility model discloses a kind of plastic accessory automatic polishing mechanism, including workbench, intercept net and threaded rod;The side of workbench is provided with recessed frame, the side of the side of recessed frame is provided with motor A;Intercept net is arranged in the top side of workbench, and the top of workbench is provided with slide rail;The utility model is slid on slide rail by cylinder A to promote moving lug, can accurately move plastic accessory to specified polishing position, cooperate the fixing of plastic mould to plastic accessory, ensure that plastic accessory is stable in position during polishing process;Through the collaborative work of cylinder A, motor A, cylinder B and motor B and the like components, realize a series of operations such as plastic accessory from clamping, polishing component moves to polishing operation and waste cleaning automation, reduce manual intervention;Through dust collector and hopper of workbench bottom formed waste cleaning system, waste generated can be sucked in time during polishing process, avoid waste accumulation.

Description

Technical Field

[0001] This utility model relates to the field of polishing machine technology, specifically to an automatic polishing mechanism for plastic parts. Background Technology

[0002] Rearview mirror housings are common automotive plastic parts. Their application in exterior trim mainly leverages their advantages in molding and processing, allowing for the creation of complex shapes with high production efficiency and consistent quality. However, injection-molded rearview mirror housings often have excess burrs on their exterior, necessitating surface polishing.

[0003] Traditional plastic parts grinding often uses single-station fixed fixtures. Car rearview mirror housings are manually placed one by one onto the fixture and secured with bolts or mechanical clips. The grinding equipment is usually fixed to one side of the worktable, and operators must manually adjust the relative position of the plastic parts to the grinding equipment. Grinding can only be done one part at a time.

[0004] Existing grinding technology uses a single-station fixed fixture, which not only makes it difficult to achieve precise positioning and rapid adjustment of the car rearview mirror housing, but also has a serious production capacity bottleneck. Since only one car rearview mirror housing can be fixed at a time, operators need to frequently repeat clamping, adjustment, and disassembly operations, which is extremely inefficient. Under long-term high-intensity operation, operators are prone to fatigue, resulting in problems such as uneven clamping force and positioning deviation.

[0005] In light of this, we have introduced an automatic grinding mechanism for plastic parts. Utility Model Content

[0006] The purpose of this invention is to provide an automatic grinding mechanism for plastic parts to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an automatic grinding mechanism for plastic parts, comprising: a worktable, a blocking net, and a threaded rod;

[0008] A concave frame is provided on the side of the workbench, and a motor A is provided on one side of the concave frame;

[0009] The interception net is installed on one side of the top of the workbench, and the top of the workbench is equipped with a slide rail;

[0010] The threaded rod is located inside the concave frame and at the output end of motor A. A threaded block is screwed onto the surface of the threaded rod. A base plate is provided at the bottom of the threaded block, and a flat plate is provided on one side of the base plate.

[0011] The top of the workbench is equipped with a clamping mechanism. The clamping mechanism, with its movable protrusion, support rod, top plate, and plastic mold working together, clamps the car rearview mirror housing for subsequent polishing.

[0012] Preferably, the clamping mechanism includes a cylinder A connected to one side of the top of the worktable, the cylinder A being bolted to the top of the worktable, slide seats connected to both sides of the bottom of the movable protrusion, the slide seats being welded to the movable protrusion or bolted together, the slide seats sliding on the surface of the slide rail, the output end of the cylinder A being connected to the surface of the movable protrusion, the support rod being connected to the top of the movable protrusion, the support rod being welded to the movable protrusion or bolted together, the top plate being connected to the top of the support rod, the top plate being welded to the support rod or bolted together, and multiple sets of the plastic molds being connected to the top of the top plate.

[0013] Preferably, a cylinder B is connected to the top of the plate, and the cylinder B is bolted to the top of the plate. A grinding frame is connected to the output end of the cylinder B below the plate. A motor B is connected inside the grinding frame, and a grinding disc is connected to the output end of the motor B.

[0014] Preferably, the grinding frame has heat dissipation holes inside, and a waterproof film is provided on the surface of the heat dissipation holes and inside the grinding frame to prevent external moisture from entering.

[0015] Preferably, the top of the threaded block is connected to a slider, and the interior of the concave frame is provided with a groove for sliding the slider, which slides inside the groove to form a limit.

[0016] Preferably, a vacuum cleaner is connected to the bottom of the workbench, and a funnel is connected to the top of the vacuum cleaner.

[0017] Preferably, the workbench is connected to four support legs at its bottom corners, the support legs are fixedly connected to the workbench, and the bottom of the support legs is provided with anti-slip texture.

[0018] Preferably, the top of the workbench is provided with a transparent enclosure outside the interception net to block splashing particles.

[0019] Preferably, the bottom of the plate also includes a robotic arm, which is connected to the bottom of the plate by screws, and one end of the robotic arm is connected to a grinding disc.

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

[0021] (1) By pushing the moving protrusion on the slide rail through cylinder A, the car rearview mirror housing can be accurately moved to the designated grinding position. With the plastic mold fixing the car rearview mirror housing, the position of the car rearview mirror housing is ensured to be stable during the grinding process, without shaking or shifting. This allows the grinding disc to grind the surface of the car rearview mirror housing evenly, ensuring the grinding accuracy and quality, and improving the product qualification rate. At the same time, the plastic mold is in multiple sets, which can place multiple sets of car rearview mirror housings.

[0022] (2) Through the coordinated work of components such as cylinder A, motor A, cylinder B and motor B, the automation of a series of operations such as clamping, grinding parts moving to grinding operation and waste cleaning of car rearview mirror housing is realized, reducing manual intervention, reducing labor intensity, improving the efficiency of grinding operation, and enabling the rapid completion of grinding work of a large number of car rearview mirror housings to meet the needs of large-scale production of enterprises.

[0023] (3) The waste cleaning system consisting of a vacuum cleaner and a funnel at the bottom of the workbench can suck up the waste generated during the grinding process in a timely manner, avoiding the accumulation of waste on the workbench. This not only keeps the working environment clean and reduces the safety hazards that may be caused by the accumulation of waste, but also prevents waste from entering the equipment and affecting the normal operation of the equipment, thus improving the reliability and stability of the equipment. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the side section of the concave frame of this utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the movable protrusion, support rod, top plate and plastic mold of this utility model.

[0027] Figure 4 This is a schematic diagram of the structure of the vacuum cleaner and funnel of this utility model;

[0028] Figure 5 This is a schematic diagram of the structure of the robotic arm in Embodiment 2 of this utility model.

[0029] In the diagram: 1. Workbench; 2. Support leg; 3. Concave frame; 4. Slide rail; 5. Vacuum cleaner; 6. Funnel; 7. Interception net; 8. Grinding frame; 9. Flat plate; 10. Cylinder B; 11. Base plate; 12. Motor A; 13. Slide groove; 14. Slider; 15. Threaded block; 16. Threaded rod; 17. Grinding disc; 18. Motor B; 19. Heat dissipation hole; 20. Cylinder A; 21. Moving protrusion; 22. Slide seat; 23. Support rod; 24. Top plate; 25. Plastic mold; 26. Transparent enclosure; 27. Robot arm. Detailed Implementation

[0030] 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.

[0031] Example 1

[0032] Please see Figure 1-4 This utility model provides a technical solution: an automatic grinding mechanism for plastic parts, including: a worktable 1, a concave frame 3 is provided on the side of the worktable 1, and a motor A12 is provided on one side of the concave frame 3;

[0033] An interception net 7 is provided on one side of the top of the workbench 1, and a slide rail 4 is provided on the top of the workbench 1.

[0034] The interception net 7 adopts an elastic support structure (such as springs or silicone pads). When impurities accumulate, the interception net can float up and down to scrape off the attached particles, achieving a self-cleaning function. In the event of a sudden blockage, a rubber hammer is used to gently tap the non-working surface (impact force <10N) in combination with compressed air blowing (pressure 0.3-0.5MPa) to quickly clear the blockage.

[0035] A threaded rod 16 is disposed inside the concave frame 3 and located at the output end of the motor A12. A threaded block 15 is screwed onto the surface of the threaded rod 16. The external thread on the surface of the threaded rod 16 matches and engages with the internal thread inside the threaded block 15. A base plate 11 is disposed at the bottom of the threaded block 15. A flat plate 9 is disposed on one side of the base plate 11. The flat plate 9 and the base plate 11 are welded together.

[0036] The top of the workbench 1 is provided with a clamping mechanism. The clamping mechanism is configured with a movable protrusion 21, a support rod 23, a top plate 24 and a plastic mold 25 to clamp the plastic parts for subsequent grinding.

[0037] The clamping mechanism includes a cylinder A20 connected to one side of the top of the workbench 1. The cylinder A20 is bolted to the top of the workbench 1. Slide seats 22 are connected to both sides of the bottom of the movable protrusion 21. The slide seats 22 and the movable protrusion 21 can be welded or bolted together. The slide seats 22 slide on the surface of the slide rail 4. The output end of the cylinder A20 is connected to the surface of the movable protrusion 21. The support rod 23 is connected to the top of the movable protrusion 21. The support rod 23 and the movable protrusion 21 can be welded or bolted together. The top plate 24 is connected to the top of the support rod 23. The top plate 24 and the support rod 23 can be welded or bolted together. Multiple sets of plastic molds 25 are connected to the top of the top plate 24. The plastic molds 25 and the top plate 24 can be fixed, welded, or detached with screws.

[0038] A cylinder B10 is connected to the top of the plate 9 by bolts. A grinding frame 8 is connected to the output end of the cylinder B10 below the plate 9. A motor B18 is connected inside the grinding frame 8. A grinding disc 17 is connected to the output end of the motor B18.

[0039] The grinding frame 8 has heat dissipation holes 19 inside. A waterproof membrane is provided on the surface of the heat dissipation holes 19 and inside the grinding frame 8 to prevent external moisture from entering. The waterproof membrane model can be ePTFE-3000.

[0040] The top of the threaded block 15 is connected to a slider 14. The interior of the concave frame 3 is provided with a groove 13 for sliding the slider 14. The slider 14 slides inside the groove 13 to form a limit.

[0041] A vacuum cleaner 5 is connected to the bottom of the workbench 1, and a funnel 6 is connected to the top of the vacuum cleaner 5.

[0042] Vacuum cleaner model 5 is Airtac ASC-50, CKDDCL-B10 or KCCACM-NB40; while funnel 6 has an inlet diameter of φ200mm, a taper of 60°, and can be made of 304 stainless steel or wear-resistant nylon (PP+GF30%).

[0043] The workbench 1 has four support legs 2 connected to its bottom corners. The support legs 2 are fixed to the workbench 1, and the bottom of the support legs 2 is provided with anti-slip texture.

[0044] The top of the workbench 1 is provided with a transparent enclosure 26 outside the interception net 7 to block splashing particles.

[0045] Specifically, in use, first, place the plastic part to be polished (i.e., the car rearview mirror housing, hereinafter referred to as plastic part) on the plastic mold 25 on the top of the top plate 24 (i.e., the shape and size of the car rearview mirror housing to be polished match the plastic mold 25, and the plastic mold 25 is a model, and the car rearview mirror housing to be polished can be clamped on the surface of the plastic mold 25). At this time, start the cylinder A20 connected to the top side of the worktable 1. The cylinder A20 outputs power to push the moving protrusion 21. Since the sliding seats 22 on both sides of the bottom of the moving protrusion 21 slide on the surface of the slide rail 4, under the push of the cylinder A20, the moving protrusion 21 will slide smoothly along the slide rail 4. The moving protrusion 21 drives the support rod 23 on its top, the top plate 24, the plastic mold 25 and the plastic part to move together until the plastic part is moved to the appropriate polishing position, completing the installation and initial positioning of the plastic part.

[0046] Once the plastic part is secured, the motor A12 on the side of the concave frame 3 is activated. The output of the motor A12 drives the threaded rod 16 to rotate. Because the threaded rod 16 has a threaded block 15 screwed onto its surface, and the slider 14 on the top of the threaded block 15 slides in the groove 13 inside the concave frame 3, when the threaded rod 16 rotates, the threaded block 15 will move in a straight line along the threaded rod 16 under the restriction of the groove 13. The threaded block 15 drives the bottom plate 11, the flat plate 9, and related components on the flat plate 9 to move together, so that the grinding frame 8 can be moved to a suitable position above or around the plastic part to prepare for the grinding operation.

[0047] After the grinding frame 8 is moved into place, the cylinder B10 on the top of the plate 9 is activated. The cylinder B10 outputs power to push the grinding frame 8 downward, so that the grinding disc 17 inside the grinding frame 8 gradually approaches the plastic part. When the grinding disc 17 contacts the plastic part at the appropriate position (i.e., the surface of the cast car rearview mirror housing), the motor B18 inside the grinding frame 8 is activated. The output end of the motor B18 drives the grinding disc 17 to rotate. The rotation of the grinding disc 17 is used to perform grinding operations on the surface of the plastic part. During the grinding process, the heat dissipation holes 19 opened inside the grinding frame 8 can dissipate the heat generated by the motor B18 and the grinding disc 17 in time, so as to avoid the grinding effect and equipment life due to excessive temperature.

[0048] During the polishing process, plastic waste will be scattered on the workbench 1. At this time, the vacuum cleaner 5 connected to the bottom of the workbench 1 will start working. The vacuum cleaner 5 will suck up the waste on the workbench 1 through the funnel 6 connected to the top. In conjunction with the use of the transparent partition 26, if any flying particles are generated during polishing, they will fall onto the interception net 7, which will also make it easier for the vacuum cleaner 5 to absorb them as much as possible, thus avoiding dust generated during polishing. This will achieve the cleaning of polishing waste, keep the working environment clean, and prevent waste from affecting the normal progress of the polishing operation (polishing can be stopped when the surface of the plastic parts on the surface of the plastic mold 25 is smooth and without burrs or roughness, thus completing the processing of the plastic parts).

[0049] It is worth noting that in this utility model, the opening of cylinder A20, cylinder B10, motor A12, and motor B18 are respectively controlled by a microcontroller. The microcontroller can be an S7-200, motor A12 and motor B18 can be 7IK400GU-S3MF or SGMJV-A5ADA21, and cylinder A20 and cylinder B can be 10SC50×100-S, SCJ2-50×100, MGPM20×50-FA, or CDQ2B20×50. The microcontroller controls the operation of motor A12 and motor B18, and cylinder A20 and cylinder B10 using conventional techniques or methods found in the prior art.

[0050] Example 2

[0051] Please refer to Figure 5 This utility model provides a technical solution that is basically the same as that in Embodiment 1, with the following slight differences:

[0052] Specifically, the bottom of the plate 9 also includes a robotic arm 27, which is connected to the bottom of the plate 9 by screws, and one end of the robotic arm 27 is connected to the grinding disc 17.

[0053] The microcontroller controls the start of the robotic arm 27, which adjusts the angle and position of the polishing disc 17 through flexible joint movements, so that it fits the surface of the car rearview mirror housing in the best posture and begins to polish the car rearview mirror housing.

[0054] During the polishing process, if the surface of the car rearview mirror housing is complex and difficult to reach with conventional polishing methods, the robotic arm 27 can adjust the posture and position of the polishing disc 17 in real time according to the preset program or information fed back by the sensor, so as to ensure that every corner of the car rearview mirror housing can be effectively polished.

[0055] The robotic arm 27 is a 6-DOF robotic arm (recommended model: UR5e collaborative robot). It drives each joint through servo motors to achieve compound motion of X / Y / Z axis translation and rotation around three axes, which drives the grinding disc 17 to complete precise movement in three-dimensional space, thus facilitating the grinding of the surface of the car rearview mirror housing.

[0056] Force feedback adjustment: The end of the robotic arm 27 is equipped with a pressure sensor to monitor the grinding pressure in real time and automatically adjust its posture to ensure uniform grinding force (±0.1N control accuracy).

[0057] Collaborative operation: Using the reference plane of the flat plate 9 for positioning, the robot arm 27 adopts a "master-slave control" mode. First, the flat plate 9 completes the coarse positioning, and then the robot arm 27 performs fine-tuning compensation (compensation accuracy reaches ±0.05mm).

[0058] Flexible processing: The 6-DOF structure can adapt to the complex contour grinding of curved workpieces (such as the housing of a car rearview mirror);

[0059] Recommended model parameters:

[0060] Model UR5e (UniversalRobots) Elite EC66 Siasun SR6C Load Capacity 5kg 6kg 6kg Repeatability ±0.03mm ±0.05mm ±0.04mm Working Radius 850mm 910mm 900mm Protection Rating IP54 IP67 IP65.

[0061] 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. An automatic grinding mechanism for plastic parts, characterized in that, include: Workbench (1), a concave frame (3) is provided on the side of the workbench (1), and a motor A (12) is provided on one side of the concave frame (3). An interception net (7) is set on the top side of the workbench (1), and a slide rail (4) is provided on the top of the workbench (1). A threaded rod (16) is set inside the concave frame (3) and located at the output end of the motor A (12). A threaded block (15) is screwed onto the surface of the threaded rod (16). A base plate (11) is provided at the bottom of the threaded block (15). A flat plate (9) is provided on one side of the base plate (11). The top of the workbench (1) is provided with a clamping mechanism. The clamping mechanism is configured with a moving protrusion (21), a support rod (23), a top plate (24), and a plastic mold (25) to clamp the plastic parts for subsequent polishing.

2. The automatic grinding mechanism for plastic parts according to claim 1, characterized in that, The clamping mechanism includes a cylinder A (20) connected to one side of the top of the workbench (1), a slide block (22) connected to both sides of the bottom of the movable protrusion (21), the slide block (22) sliding on the surface of the slide rail (4), the output end of the cylinder A (20) connected to the surface of the movable protrusion (21), the support rod (23) connected to the top of the movable protrusion (21), the top plate (24) connected to the top of the support rod (23), and multiple sets of plastic molds (25) connected to the top of the top plate (24).

3. The automatic grinding mechanism for plastic parts according to claim 1, characterized in that, A cylinder B (10) is connected to the top of the plate (9), and a grinding frame (8) is connected to the output end of the cylinder B (10) below the plate (9). A motor B (18) is connected inside the grinding frame (8), and a grinding disc (17) is connected to the output end of the motor B (18).

4. The automatic grinding mechanism for plastic parts according to claim 3, characterized in that, The grinding frame (8) has heat dissipation holes (19) inside.

5. The automatic grinding mechanism for plastic parts according to claim 1, characterized in that, The top of the threaded block (15) is connected to a slider (14), and the interior of the concave frame (3) is provided with a groove (13) for sliding the slider (14).

6. The automatic grinding mechanism for plastic parts according to claim 1, characterized in that, The bottom of the workbench (1) is connected to a vacuum cleaner (5), and the top of the vacuum cleaner (5) is connected to a funnel (6).

7. The automatic grinding mechanism for plastic parts according to claim 1, characterized in that, The workbench (1) is connected to support legs (2) at the four corners of its bottom.

8. The automatic grinding mechanism for plastic parts according to claim 1, characterized in that, The top of the workbench (1) is provided with a transparent enclosure (26) outside the interception net (7) to block splashing particles.

9. The automatic grinding mechanism for plastic parts according to claim 1, characterized in that, The bottom of the plate (9) also includes a robotic arm (27), which is connected to the bottom of the plate (9) by screws, and one end of the robotic arm (27) is connected to the grinding disc (17).

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