A duplex station wheel hub automatic polishing equipment

Abstract

The utility model discloses a kind of duplex station wheel hub automatic polishing equipment, comprising: rack, feed roller line, main control electric cabinet and tool replacement device;The feed roller line is installed on the upper surface of rack, including single roller line and double roller line;Single roller line side is equipped with first polishing work station, downstream double roller line at the transport direction of feed roller line is equipped with second polishing work station, and first polishing work station and second polishing work station are all including polishing robot fixed on the ground by steel base, visual unit being set on the feed roller line above wheel hub to be polished position and setting at the polishing robot end polishing ware;First polishing work station further includes the rotating clamping mechanism that penetrates single roller line, second polishing work station further includes lifting mechanism that penetrates double roller line and R angle polishing device being set in double roller line middle;Main control electric cabinet is used to provide power support for equipment and carry out basic operation to equipment;The present scheme has the characteristics of high degree of automation, high polishing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of wheel hub after-processing equipment, and in particular to a dual-station automatic wheel hub grinding equipment. Background Technology

[0002] Grinding wheel rims is a common method for repairing and improving their appearance. After machining, burrs are often generated on the bolt holes, center hole, valve holes, outer lugs, and inner radius corners of the wheel rim. Grinding can remove these burrs from the wheel rim surface. Currently, most factories still use manual grinding, which suffers from low efficiency, inconsistent quality, high labor intensity for workers, and harsh working conditions.

[0003] Existing automated wheel hub grinding equipment typically suffers from the following structural or functional defects: limited functionality (one grinding unit per set of equipment, long grinding time, and ability to handle only one type of burr), resulting in lengthy production line layouts; lack of flexibility, unable to efficiently process wheel hubs of different sizes (e.g., 15-24 inches) and structures (e.g., 5 or 6 bolt holes) on the same production line; reliance on manual tool changes, impacting continuous operation efficiency; and insufficient positioning accuracy, lacking reliable vision guidance and servo positioning mechanisms, leading to poor grinding quality. Therefore, a dual-station automated wheel hub grinding system is urgently needed to address these issues. Summary of the Invention

[0004] Therefore, there is a need for an automatic wheel hub grinding device that is easy to operate and has high efficiency in automatically removing burrs.

[0005] To achieve the above objectives, the inventor provides a dual-station automatic wheel hub grinding device, comprising: a frame, a feeding roller conveyor, a main control cabinet, and a tool changing device. The feeding roller conveyor is installed on the upper surface of the frame and includes a single-roller conveyor and a double-roller conveyor for conveying wheel hubs. A first grinding station is provided on one side of the single-roller conveyor. The first grinding station includes a first grinding robot fixed to the ground by a steel base, a first vision unit positioned directly above the feeding roller conveyor at the first grinding position on the wheel hub, a rotating clamping mechanism penetrating the upper surface of the feeding roller conveyor, and a first... A grinding station is provided downstream of the feed roller conveyor line at the double roller line. The second grinding station includes a second grinding robot fixed to the ground by a steel base, a second vision unit set directly above the feed roller conveyor line at the second grinding position on the hub, a lifting mechanism penetrating the upper surface of the double roller line of the feed roller conveyor line, an auxiliary transmission mechanism set vertically on the surface of the feed roller conveyor line conveyor rollers, an R-angle grinding device set on the auxiliary transmission mechanism, and a second grinding device set on the end gripper of the second grinding robot. The main control cabinet is used to provide power support for the equipment and perform basic operations on the equipment.

[0006] As a preferred structure of this utility model, the first polisher is a copper brush polishing head, used for polishing the bolt holes of the wheel hub; the second polisher is a combined polisher, including a copper brush polishing head and a sandpaper polishing disc, used for polishing the center cover hole, bolt holes and outer lugs of the wheel hub.

[0007] As a preferred structure of this utility model, the rotating clamping mechanism includes a driving wheel set, a driven wheel set, and a servo motor, used to center and clamp the lower wheel of the hub and rotate the hub; the driving wheel set is driven and connected to the servo motor to drive the rotation of the clamped hub; the driving wheel set and the driven wheel set cooperate with each other to fix the hub; the lifting mechanism includes two sets of upgrading wheel sets.

[0008] As a preferred structure of this utility model, the R-angle grinding device includes a servo electric cylinder and a DuPont wire grinding disc installed at the output end of the servo electric cylinder. The grinding position of the DuPont wire grinding disc corresponds to the inner R-angle of the hub clamped by the rotating clamping mechanism.

[0009] As a preferred structure of this utility model, both the first vision unit and the second vision unit include a camera, a light source and a lens fixedly installed above the feed roller conveyor. The first vision unit is used to identify the wheel hub model, and the second vision unit is used to identify the angle and position of the wheel hub and to locate the positions of the inner and outer valve holes and bolt holes.

[0010] As a preferred structure of this utility model, the end grippers of the first and second grinding robots are provided with finger cylinders for disassembling and installing the grinding devices.

[0011] As a preferred structure of this utility model, the tool replacement device includes a copper brush replacement toolbox and a sandpaper replacement toolbox. The copper brush replacement toolbox is located outside the frame and within the range of motion of the first and second grinding robot grippers. The sandpaper replacement toolbox is located outside the frame and within the range of motion of the second grinding robot gripper.

[0012] As a preferred structure of this utility model, the copper brush replacement toolbox stores spare copper brush grinding heads, and the sandpaper replacement toolbox includes a storage hole and a discharge hole. The storage hole is used to store spare sandpaper, and the discharge hole is used to store used sandpaper. The head of the sandpaper grinding disc is provided with a Velcro structure for attaching sandpaper.

[0013] As a preferred structure of this utility model, the main control cabinet is an integrated control cabinet that integrates a PLC controller, a robot control unit, and a vision processing unit. The main control cabinet is electrically connected to the first grinding robot, the second grinding robot, the first vision processing unit, and the second vision processing unit via Profinet communication.

[0014] As a preferred embodiment of this invention, the device is installed entirely within a light-proof and enclosed isolation room, which is equipped with a dust collection device.

[0015] Unlike existing technologies, the above technical solution achieves the following beneficial effects: This equipment integrates multiple grinding functions into two grinding workstations, reducing equipment footprint and grinding time. Through visual recognition, it can automatically adapt to wheel hubs of different sizes and numbers of bolt holes, enabling mixed-line production. Automatic identification, positioning, and part replacement reduce worker workload, and the automated setup within a closed isolation room allows workers to avoid harsh working environments. Furthermore, when grinding wheel hubs with 6 bolt holes, the equipment can allocate one bolt hole grinding task to the second workstation, optimizing the dual-workstation cycle time and improving overall efficiency. Attached Figure Description

[0016] Figure 1 This is one of the schematic diagrams of the overall structure of the dual-station automatic wheel hub grinding equipment described in the specific implementation method; Figure 2 This is the second schematic diagram of the overall structure of the dual-station automatic wheel hub grinding equipment described in the specific implementation method; Figure 3 This is a schematic diagram of the installation of the first and second grinding robots in a specific implementation method; Figure 4 This is a schematic diagram showing the installation position of the grinder as described in the specific implementation method; Figure 5 This is a schematic diagram of the feed roller conveyor structure described in the specific implementation method; Figure 6 This is one of the schematic diagrams of the rotating clamping mechanism of the first grinding station in a specific implementation method; Figure 7 This is the second schematic diagram of the rotating clamping mechanism of the first grinding station in a specific implementation method; Figure 8 This is one of the schematic diagrams of the lifting mechanism structure described in the specific implementation method; Figure 9 This is the second schematic diagram of the lifting mechanism structure described in the specific implementation method; Figure 10 The flowchart illustrates the process of the dual-station automatic wheel hub grinding equipment described in this specific implementation.

[0017] Explanation of reference numerals in the attached figures: 1. First grinding station; 2. Second grinding station; 3. Frame; 4. Feed roller conveyor; 5. Main control cabinet; 31. Copper brush replacement toolbox; 32. Sandpaper replacement toolbox; 41. Single roller line; 42. Double roller line; 101. First grinding robot; 102. First vision unit; 103. Rotary clamping mechanism; 104. First grinder; 201. Second grinding robot; 202. Second vision unit; 203. Lifting mechanism; 204. Second grinder; 1031. Driven wheel assembly; 1032. Driven wheel assembly; 1033. Servo motor; 1041. Copper brush grinding head; 2031. Lifting wheel assembly; 2041. Sandpaper grinding head. Detailed Implementation

[0018] To explain in detail the technical content, structural features, objectives, and effects of the technical solution, the following description is provided in conjunction with specific embodiments and accompanying drawings. Example 1

[0019] like Figure 1 , 2 As shown, this embodiment provides a dual-station automatic wheel hub grinding equipment. The entire equipment is housed in a light-proof, enclosed isolation room equipped with a dust collection device. The equipment includes: a frame 3, a feed roller conveyor 4, a main control cabinet 5, and a tool changing device. The feed roller conveyor is installed on the upper surface of the frame. Figure 5 As shown, the feed roller conveyor includes a single roller conveyor 41 and a double roller conveyor 42 for conveying wheel hubs; a first grinding station 1 is provided on one side of the single roller conveyor 41, the first grinding station 1 includes a first grinding robot 101, a first vision unit 102 located directly above the feed roller conveyor 4, a rotating clamping mechanism 103 located at the first grinding position of the wheel hub and penetrating the upper surface of the feed roller conveyor 4, and a first grinder 104 located at the end gripper of the first grinding robot 101; downstream along the transport direction of the feed roller conveyor 4 A second grinding station 2 is located at the position of the double-roller conveyor. The second grinding station 2 includes a second grinding robot 201, a second vision unit 202 positioned directly above the feed roller conveyor 4, a lifting mechanism running through the feed roller conveyor and double-roller conveyor, an R-angle grinding device positioned between the rollers of the double-roller conveyor 42, and a second grinder 204 positioned at the end gripper of the second grinding robot 201. Both the first grinding robot 101 and the second grinding robot 201 are mounted on the ground via steel bases 300 to ensure the stability of the equipment during operation. Figure 4 As shown, the first grinder 104 is a copper brush grinding head 1041, used for grinding the bolt holes of the wheel hub; the second grinder 204 is a combined grinder, including the copper brush grinding head 1041 and the sandpaper grinding disc 2041, used for grinding the center cover hole, bolt holes, and outer ear of the wheel hub. The end grippers of the first grinding robot 101 and the second grinding robot 201 are equipped with finger cylinders for disassembling and installing the grinders.

[0020] In the specific implementation of this embodiment, both the first grinding robot 101 and the second grinding robot 201 are FANUC M-10iD / 12 six-axis industrial robots, such as... Figure 1 As shown, a first vision unit 102 and a second vision unit 202 are fixedly installed above the feed roller conveyor line 4 and at the positions of the wheel hubs to be polished in the first polishing station 1 and the second polishing station 2, respectively. Both the first vision unit 102 and the second vision unit 202 include a camera, a light source, and a lens. The first vision unit 102 identifies the wheel shape, takes a picture of the shape of the wheel hub's A-side, and identifies the wheel shape of the incoming wheel hub in conjunction with the height measuring light screen. At the same time, it exports the corresponding parameters in the wheel shape template for polishing. The second vision unit 202 identifies the wheel shape angle and position, takes a picture of the shape of the wheel hub's A-side, detects the position and angle of the valve hole, drives the servo motor to rotate the valve hole to the designated position, and identifies the position coordinates of the bolt holes (including the inner valve holes) to guide the robot to polish.

[0021] like Figure 6 , 7 As shown, the rotating clamping mechanism 103 of the first grinding station 1 includes a drive wheel set 1031, a driven wheel set 1032, and a servo motor 1033, used to center and clamp the lower wheel of the hub and rotate the hub; the drive wheel set 11 is driven by the servo motor 13 and is used to drive the rotation of the clamped hub; the drive wheel set 11 and the driven wheel set 12 cooperate to fix the hub. Figure 8 , 9 As shown, the lifting mechanism of the second grinding station 2 includes two sets of lifting wheel sets for fixing and lifting the position of the wheel hub.

[0022] The R-angle grinding device includes a servo electric cylinder and a DuPont wire grinding disc 2032 installed at the output end of the servo electric cylinder. The grinding position of the DuPont wire grinding disc 2032 corresponds to the inner R-angle of the hub clamped by the rotating clamping mechanism.

[0023] like Figure 1 As shown, the tool changing device includes a copper brush changing toolbox 31 and a sandpaper changing toolbox 32. The copper brush changing toolbox 31 is located outside the frame, within the range of motion of the first and second grinding robot grippers. The sandpaper changing toolbox 32 is located outside the frame, within the range of motion of the second grinding robot gripper. The copper brush changing toolbox 31 stores spare copper brush grinding heads. The sandpaper changing toolbox 32 includes a storage hole and a discharge hole. The storage hole is used to store spare sandpaper, and the discharge hole is used to store used sandpaper. The head of the sandpaper grinding disc has a Velcro structure for attaching the sandpaper.

[0024] The main control cabinet 5 is an integrated control cabinet. In this specific implementation, a Siemens S7-1500 series PLC controller serves as the central controller. The PLC controller communicates with the robot control unit and vision processing unit via Profinet communication. The main control cabinet is electrically connected to the first grinding robot 101, the second grinding robot 201, the first vision processing unit 102, and the second vision processing unit 202, and exchanges data with them. In this embodiment, a Siemens TP10 is selected as the human-machine interface for ease of operation and viewing. It serves as the control layer network and interacts with the PLC via Profinet communication to achieve operation and real-time monitoring. The touchscreen displays relevant information about the grinding equipment, such as line number, consumable life, output, processing cycle time, key I / O signals, and alarm information. Furthermore, the main control cabinet 5 has a reserved Ethernet communication interface for communication with the logistics conveying system, WCS system, and SCADA system. Example 2

[0025] like Figure 7 As shown, the workflow of this embodiment includes: after the wheel hub is transported to the first workstation by the rollers of the feeding roller conveyor, the wheel hub stops transporting and is centered and clamped. The first vision unit is activated, captures an image of the wheel hub, identifies the wheel hub model through image processing software, and sends the model information to the control system. The control system calls the pre-stored grinding program corresponding to the model and drives the first grinding robot. The first grinding robot drives the copper brush grinding head to grind burrs on each bolt hole in sequence. After completion, the wheel hub is released and continues to be transported to the second grinding station via the feeding roller conveyor. It is worth mentioning that if the wheel hub to be ground is a 5-bolt-hole wheel hub, all 5 bolt holes are ground. If the wheel hub to be ground is a 6-bolt wheel hub, 5 bolt holes are ground, and the remaining bolt hole is ground in the second grinding station.

[0026] After the first polishing process is completed, the wheel hub flows into the second polishing workstation. The wheel hub stops transporting and is centered and clamped. The second vision unit takes a picture of the wheel hub to accurately identify the position and angle of the valve hole. Through the action of the servo motor of the rotating clamping mechanism, the active wheel group is driven to rotate, which in turn drives the secondary wheel group to rotate, positioning the wheel hub in the appropriate position. The second polishing robot drives the copper brush polishing head to polish the center cover hole and the front and back of the valve hole. If the wheel hub being polished is a 6-bolt hole wheel hub, the remaining 1 bolt hole also needs to be polished. Then the second polishing robot switches the gripper, drives the sandpaper polishing disc to polish the outer ear, and drives the DuPont wire polishing disc of the R-angle polishing device to polish the R-angle, completing the polishing.

[0027] In this embodiment, the first grinding station grinds 5 bolt holes for a fixed time of approximately 30 seconds. When the wheel hub has 6 bolt holes, the grinding requirements for the outer ear and R-angle are different from those for a wheel hub with 5 bolt holes. Therefore, the grinding time for the outer ear and R-angle in the second grinding process can be shortened. In the specific implementation of this embodiment, the grinding time for the outer ear and R-angle is shortened by 5 seconds. The shortened time is used to grind the 1 bolt hole that was not ground by the first grinding station, ensuring that the second grinding time is also approximately 30 seconds. The cycle times of the first and second grinding stations are close, which improves the efficiency of wheel hub grinding.

[0028] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection for this utility model. Therefore, any changes and modifications made to the embodiments described herein based on the innovative concept of this utility model, or equivalent structural or procedural transformations made using the content of this utility model's specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included within the scope of patent protection for this utility model.

Claims

1. A dual-station automatic wheel hub grinding device, characterized in that, include: The system includes a frame, a feed roller conveyor, a main control cabinet, and a tool changing device. The feed roller conveyor, mounted on the upper surface of the frame, includes single-roller and double-roller conveyors for conveying wheel hubs. A first grinding station is located on one side of the single-roller feed roller conveyor. This station includes a first grinding robot fixed to the ground via a steel base, a first vision unit positioned directly above the feed roller conveyor at the first grinding location on the wheel hub, a rotating clamping mechanism penetrating the upper surface of the feed roller conveyor, and a first grinder located at the end gripper of the first grinding robot. A conveyor belt is located along the feed roller conveyor. A second grinding station is located downstream at the double roller line. The second grinding station includes a second grinding robot fixed to the ground by a steel base, a second vision unit located directly above the feed roller conveyor at the second grinding position on the hub, a lifting mechanism penetrating the upper surface of the double rollers of the feed roller conveyor, an auxiliary transmission mechanism vertically arranged on the surface of the feed roller conveyor's conveyor rollers, an R-angle grinding device mounted on the auxiliary transmission mechanism, and a second grinder mounted on the end gripper of the second grinding robot. The main control cabinet is used to provide power support for the equipment and perform basic operations on the equipment.

2. The dual-station automatic wheel hub grinding equipment according to claim 1, characterized in that: The first polisher is a copper brush polishing head, used to polish the bolt holes of the wheel hub; the second polisher is a combination polisher, including a copper brush polishing head and a sandpaper polishing disc, used to polish the center cover hole, bolt holes and outer lugs of the wheel hub.

3. The dual-station automatic wheel hub grinding equipment according to claim 1, characterized in that: The rotating clamping mechanism includes a driving wheel set, a driven wheel set, and a servo motor, used to center and clamp the lower wheel of the hub and rotate the hub; the driving wheel set is driven and connected to the servo motor to drive the rotation of the clamped hub; the driving wheel set and the driven wheel set cooperate with each other to fix the hub; the lifting mechanism includes two sets of lifting wheel sets.

4. The dual-station automatic wheel hub grinding equipment according to claim 1, characterized in that: The R-angle grinding device includes a servo electric cylinder and a DuPont wire grinding disc installed at the output end of the servo electric cylinder. The grinding position of the DuPont wire grinding disc corresponds to the inner R-angle of the hub clamped by the rotary clamping mechanism.

5. The dual-station automatic wheel hub grinding equipment according to claim 1, characterized in that: Both the first vision unit and the second vision unit include a camera, a light source, and a lens that are fixedly installed above the feed roller conveyor. The first vision unit is used to identify the wheel hub model, and the second vision unit is used to identify the fixed angle and position of the wheel hub and to locate the positions of the inner and outer valve holes and bolt holes.

6. The dual-station automatic wheel hub grinding equipment according to claim 1, characterized in that: The first and second grinding robots are equipped with finger cylinders at the end grippers for disassembling and installing the grinding devices.

7. The dual-station automatic wheel hub grinding equipment according to claim 6, characterized in that: The tool replacement device includes a copper brush replacement toolbox and a sandpaper replacement toolbox. The copper brush replacement toolbox is located outside the frame and within the range of motion of the first and second grinding robot grippers. The sandpaper replacement toolbox is located outside the frame and within the range of motion of the second grinding robot gripper.

8. The dual-station automatic wheel hub grinding equipment according to claim 7, characterized in that: The copper brush replacement toolbox stores spare copper brush grinding heads, and the sandpaper replacement toolbox includes a storage hole and a discharge hole. The storage hole is used to store spare sandpaper sheets, and the discharge hole is used to store used sandpaper sheets. The head of the sandpaper grinding disc has a Velcro structure for attaching sandpaper sheets.

9. The dual-station automatic wheel hub grinding equipment according to claim 1, characterized in that: The main control cabinet is an integrated control cabinet that integrates a PLC controller, a robot control unit, and a vision processing unit. The main control cabinet is electrically connected to the first grinding robot, the second grinding robot, the first vision processing unit, and the second vision processing unit via Profinet communication.

10. The dual-station automatic wheel hub grinding equipment according to any one of claims 1 to 9, characterized in that: The dual-station automatic wheel hub grinding equipment is installed entirely in a light-proof and enclosed isolation room, which is equipped with a dust collection device.

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