Guide arm automatic grinding device and grinding method

Abstract

The present invention relates to an automatic guide arm grinding device and method. The device includes a conveying unit comprising a first conveyor belt and a second conveyor belt; a positioning unit comprising a first docking plate, a second docking plate, a first fixing assembly, and a second fixing assembly. The first and second docking plates are arranged at an angle, with the upper end of the first docking plate docking with the first conveyor belt, and the second docking plate located below the first docking plate. A gap is formed between the lower end of the first docking plate and the second docking plate, and the second docking plate can dock with the second conveyor belt; the first fixing assembly and the second fixing assembly are used to fix the guide arm located on the first and second docking plates; and an automatic grinding unit comprising a first grinding unit and a second grinding unit. The first and second grinding units are used to grind the guide arm located on the first and second docking plates. The present invention has a simple structure, good stability and fault tolerance, high production efficiency, and strong adaptability.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile parts processing, and particularly relates to an automatic polishing device and a polishing method for a guide arm. Background Art

[0002] With the development of the economy and the increase in awareness of vehicles, consumers are increasingly aware of the importance of a good chassis to vehicle performance and safety. Air suspension is becoming a standard feature of high-quality automobile chassis, which can effectively improve vehicle smoothness, ride safety and comfort, reduce fuel consumption and alleviate tire wear. The excellent vibration filtering performance of air suspension can reduce damage to electrical, instrumentation and other accessories of the body and chassis, thereby reducing vehicle maintenance costs.

[0003] The guide arm is an important component of the air suspension, which plays a role in bearing pressure and guiding. The force changes frequently and fluctuates greatly. The guide arm needs to undergo rolling, bending, torsion, welding and heat treatment during production. There are often defects such as small cracks and welding protrusions on the surface of the product. Manual polishing is required to eliminate defects and improve product quality and appearance. Manual polishing is inefficient and it is difficult to avoid omissions. The polishing quality and polishing effects of different workers are also uneven.

[0004] In addition, with the development of the industry, there are more and more models of guide arms, and the requirements for the dimensional accuracy of the guide arms such as arc length, curvature, aperture, and hole spacing are getting higher and higher. When processing guide arms of different models, it is increasingly difficult to meet production requirements for the treatment of key parts through manual surface treatment.

[0005] In view of this, it is necessary to provide an automatic polishing device that can replace manual labor and perform surface treatment on the guide arm with higher efficiency. Summary of the Invention

[0006] An object of the present invention is to provide an automatic grinding device for a guide arm.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] An automatic grinding device for a guide arm, comprising:

[0009] Conveying unit: comprising a first conveyor belt and a second conveyor belt, wherein the first conveyor belt and the second conveyor belt are arranged up and down in the height direction;

[0010] Positioning unit: includes a first docking plate, a second docking plate, a first fixing assembly and a second fixing assembly, the first docking plate and the second docking plate are arranged at an angle relative to the horizontal direction, the upper end of the first docking plate is docked with the first conveyor belt, the second docking plate is located below the first docking plate, and a gap is formed between the lower end of the first docking plate and the second docking plate for the guide arm to pass through, and the second docking plate can be docked with the second conveyor belt; the first fixing assembly is used to fix the guide arm located on the first docking plate, and the second fixing assembly is used to fix the guide arm located on the second docking plate;

[0011] Automatic grinding unit: includes a first grinding unit and a second grinding unit, wherein the first grinding unit is used for grinding the guide arm located on the first docking plate, and the second grinding unit is used for grinding the guide arm located on the second docking plate.

[0012] In the above technical solution, preferably, the first fixing assembly includes a telescopic plate assembly and / or a first clamping ejector pin assembly.

[0013] The telescopic plate assembly includes a telescopic plate and a telescopic plate driving member connected to the telescopic plate. The telescopic plate is arranged in the gap between the first docking plate and the second docking plate. The telescopic plate assembly has an extended state and a retracted state. In the extended state, the telescopic plate blocks the gap to restrict the guide arm from sliding from the first docking plate to the second docking plate; in the retracted state, the telescopic plate releases the blockage of the guide arm.

[0014] The first clamping ejector pin assembly includes a first ejector pin and an ejector pin driving member connected to the first ejector pin. The first ejector pin can move toward the first docking plate to fix the guide arm located on the first docking plate.

[0015] Further preferably, the telescopic plate is provided with pillars; a pair of pillars are provided for positioning the two ends of the guide arm.

[0016] More preferably, shock-absorbing pads are provided on the pillars.

[0017] In the above technical solution, preferably, the second fixing assembly includes a stopper and / or a second clamping ejector pin assembly.

[0018] The stopper is used to prevent the guide arm from sliding off the second stop plate, and the height of the stopper is not lower than the height of the second conveyor belt;

[0019] The second clamping ejector pin assembly includes a second ejector pin and an ejector pin driving member connected to the second ejector pin. The second ejector pin can move toward the second docking plate to fix the guide arm located on the second docking plate.

[0020] Further preferably, a pair of second ejector pins are provided for positioning the two ends of the guide arm.

[0021] Further preferably, a shock-absorbing pad is provided on the stop block.

[0022] Preferably, the above technical solution is such that the second docking plate includes guide rails on both sides, a plate body slidably arranged on the guide rails, and a plate body driving member connected to the plate body, and when the plate body slides to a set position, it can dock with the second conveyor belt.

[0023] Preferably, the angle between the first docking plate and the horizontal direction is 30-45°.

[0024] The angle between the first docking plate and the second docking plate is 100-150°.

[0025] Preferably, the above technical solution is such that the device further comprises a sensor unit, the sensor unit comprising a first sensor and a second sensor, the first sensor being used to sense the guide arm on the first docking plate, the second sensor being used to sense the guide arm on the second docking plate, the first sensor being connected to the first fixed component and the first polishing unit, and the second sensor being connected to the second fixed component and the second polishing unit.

[0026] Preferably, the first grinding unit and the second grinding unit comprise an industrial robot with a 3D camera and a quick-change tool library, wherein the quick-change tool library is provided with grinding tools and polishing tools for replacing tool heads of the industrial robot.

[0027] The first grinding unit is arranged above the second conveyor belt and on one side of the first docking plate;

[0028] The second grinding unit is arranged below the first conveyor belt and on one side of the second docking plate.

[0029] Preferably, in the above technical solution, the device further comprises a purge unit, and the purge unit is used to blow off the dust generated by grinding.

[0030] Another object of the present invention is to provide a method for automatically grinding a guide arm.

[0031] In order to achieve the above object, the technical solution adopted by the present invention is:

[0032] A method for automatically polishing a guide arm, which is implemented using the device, comprises:

[0033] The guide arm is placed on the first conveyor belt according to the set orientation and transported to the first docking plate. The first fixing assembly fixes the guide arm that slides to the first docking plate. The first grinding unit automatically grinds one side and edge of the guide arm. After the grinding is completed, the first fixing assembly removes the fixation of the guide arm, and the guide arm slides toward the second docking plate.

[0034] The guide arm slides from the gap between the first docking plate and the second docking plate to the second docking plate, the second fixing assembly fixes the guide arm that slides to the second docking plate, and the second grinding unit automatically grinds the other side and edge of the guide arm. After the grinding is completed, the second fixing assembly removes the fixation of the guide arm, and the second docking plate is adjusted and docked with the second conveyor belt, so that the guide arm falls onto the second conveyor belt.

[0035] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0036] 1. The structural design is simple, with good stability and fault tolerance, and can adapt to the processing of multiple types of guide arms. When the guide arm slides onto the first docking plate and the second docking plate, the positioning unit can easily adjust the posture of the guide arm, making the posture of the guide arm relatively uniform and stable when it is fixed, which is convenient for the automatic polishing unit to perform scanning, imaging and polishing.

[0037] 2. The first and second docking plates are used to expose the two side surfaces of the guide arm for processing. The guide arm is stably clamped and fixed at three points by the positioning unit. The clamping points on the first and second docking plates do not overlap, which effectively avoids processing dead angles and enables comprehensive processing of the guide arm.

[0038] 3. The first docking plate and the second docking plate can provide two processing positions. The first grinding unit and the second grinding unit can work simultaneously without interfering with each other, which is beneficial to improving processing efficiency;

[0039] 4. The layout is compact and occupies little space. The first grinding unit and the second grinding unit are respectively arranged on both sides of the fixed unit, which fully utilizes the space below the first conveyor belt and above the second conveyor belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Attachment Figure 1 It is a structural schematic diagram of the automatic polishing device of the present invention;

[0041] Attachment Figure 2It is the moving path of the guide arm of the present invention during processing.

[0042] In the above attached figures:

[0043] 10. First conveyor belt; 11. Second conveyor belt;

[0044] 20. First docking plate; 21. Second docking plate; 210. Guide rail; 211. Plate; 212. Plate driving member; 22. Gap;

[0045] 230, telescopic plate; 231, telescopic plate driving member; 232, support pillar; 240, first ejector pin; 241, ejector pin driving member;

[0046] 25. Stopper; 260. Second ejector; 261. Ejector driving member;

[0047] 30. First grinding unit; 31. Second grinding unit;

[0048] 40. First sensor; 41. Second sensor; DETAILED DESCRIPTION

[0049] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0050] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] like Figure 1 The guide arm automatic grinding device shown includes a transmission unit, a positioning unit, an automatic grinding unit, a sensor unit, and a purge unit. Each unit is described in detail below.

[0052] The conveying unit includes a first conveyor belt 10 and a second conveyor belt 11. The first conveyor belt 10 and the second conveyor belt 11 are arranged vertically and horizontally. In this embodiment, the first conveyor belt 10 moves in a step-by-step manner, releasing one guide arm to the positioning unit each time.

[0053] The positioning unit includes a first docking plate 20, a second docking plate 21, a first fixing assembly and a second fixing assembly.

[0054] The first and second docking plates 20, 21 are arranged at an angle relative to the horizontal direction. The upper end of the first docking plate 20 is connected to the first conveyor belt 10, and the second docking plate 21 is located below the first docking plate 20. A gap 22 is formed between the lower end of the first docking plate 21 and the second docking plate for the guide arm to pass through, and the second docking plate 21 can be connected to the second conveyor belt 11. The setting angle of the first docking plate 20 should be relatively gentle, preferably at an angle of 30-45 degrees with the horizontal direction. The angle between the first and second docking plates 20, 21 is 100-150 degrees, that is, the first and second docking plates 20, 21 are arranged in a large V-shape, which facilitates the sliding of the guide arm.

[0055] In this embodiment, the second stop plate 21 includes guide rails 210 on both sides, a plate body 211 slidably disposed on the guide rails, and a plate body driving member 212 connected to the plate body 211. The plate body driving member 212 drives the plate body 211 to slide in its inclined direction. When the plate body 211 slides to the position shown in FIG. Figure 2 In the position shown (plate 211 docked with second conveyor belt 11), the guide arm loses the support of plate 211 and falls under the action of gravity onto the second conveyor belt 11. Of course, the second docking plate 21 does not need to be completely slid to the position shown; it only needs to be slid to a position where the guide arm can naturally fall, at which point the center of gravity of the guide arm is to the right of the contact fulcrum between the second docking plate 21 and the upper portion of the guide arm.

[0056] The first fixing assembly is used to fix the guide arm located on the first docking plate 20. In this embodiment, the first fixing assembly includes a telescopic plate assembly and a first clamping ejector pin assembly. Specifically:

[0057] The telescopic plate assembly includes a telescopic plate 230 and a telescopic plate driver 231 connected to the telescopic plate 230. The telescopic plate 230 is disposed in the gap 22 between the first and second docking plates 20, 21. Under the control of the telescopic plate driver 231, the telescopic plate 230 can be extended to block the guide arm on the first docking plate 20, restricting the guide arm from sliding from the first docking plate 20 to the second docking plate 21; the telescopic plate 230 can also be retracted to the left side of the first docking plate 20, releasing the blockage on the guide arm. The telescopic plate 230 is provided with a pair of struts 232 for positioning the lower ends of the guide arm. The struts 232 are also provided with shock-absorbing pads. Since the guide arm slides down along the docking plates, the impact force is relatively large. The shock-absorbing pads can provide a buffer to prevent the guide arm from rebounding when it falls. The shock-absorbing pads can be made of wear-resistant rubber sheets.

[0058] The first clamping pin assembly is disposed on the side of the first docking plate 20 that secures the guide arm. It includes a first pin 240 and a pin driver 241 connected to the first pin 240. Driven by the pin driver 241, the first pin 240 can move toward the first docking plate 20 to clamp the guide arm positioned on the first docking plate 20 from the middle portion of the upper side. When the guide arm is secured to the first docking plate 20, the support posts 232 clamp the guide arm from both ends of the lower side, and the first pin 240 clamps the guide arm from the middle portion of the upper side, forming a three-point stable clamping fixation for the guide arm. The pair of support posts 232 prop up the guide arm, exposing a large portion of the bottom edge of the guide arm, allowing the automatic grinding unit to grind the bottom edge (including the middle portion).

[0059] The second fixing assembly is used to fix the guide arm on the second docking plate 21. In this embodiment, the second fixing assembly includes a stopper 25 and a second clamping ejector pin assembly. Specifically:

[0060] The stopper 25 is used to limit the guide arm from sliding off the second stop plate 21 . The height of the stopper 25 is not lower than the height of the second conveyor belt 11 . A shock-absorbing pad is also provided on the stopper 25 .

[0061] The second clamping pin assembly is positioned on the side of the second docking plate 21 that secures the guide arm. It includes a second pin 260 and a pin driver 261 connected to the second pin 260. Driven by the pin driver 261, the second pin 260 can be moved toward the second docking plate 21 to secure the guide arm on the second docking plate 21. A pair of second pins 260 are provided to position the upper ends of the guide arm. When the guide arm is secured to the second docking plate 21, a stopper 25 clamps the guide arm from the middle of the lower side, while the second pins 260 clamp the guide arm from the upper ends, creating a three-point, stable clamp. The stopper 25 lifts the guide arm from the middle of the bottom edge, enabling the automatic grinding unit to grind the bottom edge (including both sides). The same process is applied to the upper edge of the guide arm. The clamping points on the first docking plate 20 and the second docking plate 21 do not overlap, effectively avoiding blind spots during machining.

[0062] The automatic grinding unit includes a first grinding unit 30 and a second grinding unit 31. The first grinding unit 30 is located above the second conveyor belt 11 and on the side where the first docking plate 20 fixes the guide arm, and is used to grind the guide arm located on the first docking plate 20. The second grinding unit 31 is located below the first conveyor belt 10 and on the side where the second docking plate 2 fixes the guide arm 1, and is used to grind the guide arm located on the second docking plate 21. Through optimized layout, the space below the first conveyor belt 10 and above the second conveyor belt 11 is rationally utilized, effectively reducing the overall footprint of the device.

[0063] The first grinding unit 30 and the second grinding unit 31 include an industrial robot with a 3D camera and a quick-change tool library. The quick-change tool library is provided with grinding tools and polishing tools for the industrial robot to replace the tool head. The industrial robot can select the corresponding tools for automatic replacement according to the grinding needs. Of course, a feeding device for the grinding sheet can also be provided so that the industrial robot can tear off the old grinding sheet (the grinding sheet has a rough surface to facilitate bonding with the tool head) through the feeding device after working for a period of time and replace it with a new grinding sheet.

[0064] The sensor unit includes a first sensor 40 and a second sensor 41. The first sensor 40 is disposed at the lower edge of the first docking plate 20 and is used to sense the guide arm on the first docking plate 20. The first sensor 40 is signal-connected to the telescopic plate driver 231, the ejector driver 241, and the first polishing unit 30. When the first sensor 40 senses that the guide arm has slipped onto the first docking plate 20, the telescopic plate driver 231 and the ejector driver 241 are fixed, and the first polishing unit 30 performs polishing.

[0065] The second sensor 41 is mounted on the guide rail 210 and is used to sense the guide arm on the second docking plate 21. The second sensor 41 is signal-connected to the ejector driver 261, the plate driver 212, and the second polishing unit 31. When the second sensor 41 senses that the guide arm has fallen onto the second docking plate 21, the ejector driver 261 is secured, and the second polishing unit 31 begins polishing. Once polishing is complete, the plate driver 212 drives the plate 211 to slide.

[0066] The blowing unit can intermittently blow away the dust generated by grinding that falls on the telescopic plate 230 and the stopper 25, etc.

[0067] The polishing method of this embodiment is described in detail below:

[0068] Place the guide arm on the first conveyor belt 10 in the set direction. The first conveyor belt 10 moves step by step, releasing one guide arm onto the first docking plate 20 each time.

[0069] The guide arm slides from the first conveyor belt 10 to the first docking plate 20 and slides down along the first docking plate 20 and is blocked by the extended telescopic plate 230. At this time, one side of the guide arm is exposed.

[0070] After the first sensor 40 detects the incoming material, the ejector drive 241 drives the first ejector 240 to move and fix the guide arm. Then the 3D camera of the first polishing unit 30 takes a picture of the guide arm and models it. Then the first polishing unit 30 automatically polishes one side and edge of the guide arm.

[0071] After the first grinding unit 30 finishes grinding, the telescopic plate 230 retracts, and the guide arm slides down from the gap 22 to the plate body 211 of the second stop plate 21 and stops at the stop block 25. At this time, the other side of the guide arm is exposed.

[0072] After the second sensor 41 detects the incoming material, the ejector drive 261 drives the second ejector 260 to move and fix the guide arm. Then the 3D camera of the second polishing unit 31 takes a picture of the guide arm and models it. Then the second polishing unit 31 automatically polishes the other side and edge of the guide arm.

[0073] After the second grinding unit 31 completes grinding, the plate 211 moves downward along the guide rail 210, the guide arm loses the support of the plate 211, and falls onto the second conveyor belt 11 under the action of gravity. The second conveyor belt 11 transports the guide arm to the discharge end for collection.

[0074] Among them: when the previous guide arm slides off the first docking plate 20, the telescopic plate 230 is reset, and the next guide arm can be accommodated to dock on the first docking plate 20. The first grinding unit 30 and the second grinding unit 31 process one guide arm respectively, thereby improving work efficiency.

[0075] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit of the present invention are intended to be covered by the scope of protection of the present invention.

Claims

1. An automatic polishing device for a guide arm, characterized by: include: Conveying unit: comprising a first conveyor belt and a second conveyor belt, wherein the first conveyor belt and the second conveyor belt are arranged up and down in the height direction; Positioning unit: includes a first docking plate, a second docking plate, a first fixing assembly and a second fixing assembly, the first docking plate and the second docking plate are arranged at an angle relative to the horizontal direction, the upper end of the first docking plate is docked with the first conveyor belt, the second docking plate is located below the first docking plate, and a gap is formed between the lower end of the first docking plate and the second docking plate for the guide arm to pass through, and the second docking plate can be docked with the second conveyor belt; the first fixing assembly is used to fix the guide arm located on the first docking plate, the first fixing assembly includes a telescopic plate assembly and a first clamping ejector pin assembly, the second fixing assembly is used to fix the guide arm located on the second docking plate, and the second fixing assembly includes a stopper and a second clamping ejector pin assembly; Automatic grinding unit: includes a first grinding unit and a second grinding unit, wherein the first grinding unit is used for grinding the guide arm located on the first docking plate, and the second grinding unit is used for grinding the guide arm located on the second docking plate.

2. The automatic guide arm grinding device according to claim 1, characterized in that: The telescopic plate assembly includes a telescopic plate and a telescopic plate driving member connected to the telescopic plate. The telescopic plate is arranged in the gap between the first docking plate and the second docking plate. The telescopic plate assembly has an extended state and a retracted state. In the extended state, the telescopic plate blocks the gap to restrict the guide arm from sliding from the first docking plate to the second docking plate; in the retracted state, the telescopic plate releases the blockage of the guide arm. The first clamping ejector pin assembly includes a first ejector pin and an ejector pin driving member connected to the first ejector pin. The first ejector pin can move toward the first docking plate to fix the guide arm located on the first docking plate.

3. The automatic guide arm grinding device according to claim 2, characterized in that: The telescopic plate is provided with a support column; the support column is provided with a pair for positioning the two ends of the guide arm.

4. The automatic guide arm grinding device according to claim 1, characterized in that: The stopper is used to prevent the guide arm from sliding off the second stop plate, and the height of the stopper is not lower than the height of the second conveyor belt; The second clamping ejector pin assembly includes a second ejector pin and an ejector pin driving member connected to the second ejector pin. The second ejector pin can move toward the second docking plate to fix the guide arm located on the second docking plate.

5. The automatic guide arm grinding device according to claim 1, characterized in that: The second docking plate includes guide rails on both sides, a plate body slidably arranged on the guide rails, and a plate body driving member connected to the plate body. When the plate body slides to a set position, it can dock with the second conveyor belt.

6. The automatic guide arm grinding device according to claim 1, characterized in that: The angle between the first docking plate and the horizontal direction is 30-45°; The angle between the first docking plate and the second docking plate is 100-150°.

7. The automatic guide arm grinding device according to claim 1, characterized in that: The device also includes a sensor unit, which includes a first sensor and a second sensor. The first sensor is used to sense the guide arm on the first docking plate, and the second sensor is used to sense the guide arm on the second docking plate. The first sensor is connected to the first fixed component and the first polishing unit, and the second sensor is connected to the second fixed component and the second polishing unit.

8. The automatic guide arm grinding device according to claim 1, characterized in that: The first grinding unit and the second grinding unit include an industrial robot with a 3D camera and a quick-change tool library. The quick-change tool library is provided with grinding tools and polishing tools for the industrial robot to replace the tool head. The first grinding unit is arranged above the second conveyor belt and on one side of the first docking plate; The second grinding unit is arranged below the first conveyor belt and on one side of the second docking plate.

9. The automatic guide arm grinding device according to claim 1, characterized in that: The device also includes a purge unit, which is used to blow off dust generated by grinding.

10. A guide arm automatic grinding method, characterized in that: It is implemented by the device according to any one of claims 1 to 9, comprising: The guide arm is placed on the first conveyor belt according to the set orientation and transported to the first docking plate. The first fixing assembly fixes the guide arm that slides to the first docking plate. The first grinding unit automatically grinds one side and edge of the guide arm. After the grinding is completed, the first fixing assembly removes the fixation of the guide arm, and the guide arm slides toward the second docking plate. The guide arm slides from the gap between the first docking plate and the second docking plate to the second docking plate, the second fixing assembly fixes the guide arm that slides to the second docking plate, and the second grinding unit automatically grinds the other side and edge of the guide arm. After the grinding is completed, the second fixing assembly removes the fixation of the guide arm, and the second docking plate is adjusted and docked with the second conveyor belt, so that the guide arm falls onto the second conveyor belt.

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