Water circulation polishing line for front cover of automobile part

Abstract

The invention relates to a water circulation grinding line for a front cover of an automobile part. The water circulation grinding line for the front cover of the automobile part comprises a double-layer feeding machine, a grinding assembly, a plurality of wet type grinding machine tables, a transfer assembly and a force control system. The polishing assembly is provided with a plurality of polishing robots, each polishing robot is provided with a polishing head, and the multiple polishing robots are matched to polish products. The multiple wet-type grinding machine tables correspond to the multiple grinding robots one to one, and each wet-type grinding machine table is provided with at least one spraying pipe used for wetting products so as to reduce dust pollution during product grinding. The transfer assembly is provided with a plurality of transfer racks, and each transfer rack is arranged between every two adjacent grinding robots and used for transferring products. And the force control system is connected with a plurality of polishing robots. The grinding assembly is matched with the wet-type grinding machine table to conduct wet-type grinding on products, the labor cost is reduced, dust pollution is reduced, and meanwhile the grinding depth is controlled through the force control system so that the consistency of product grinding can be guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of workpiece grinding, and specifically relates to a water circulation grinding line for the front hood of automotive parts. Background Art

[0002] When producing the front hood of automotive parts, it is necessary to grind and polish the four corners, neck, ejector pin burrs, and reverse irregular hole burrs of the product. On-site, workers hold grinding machines for manual grinding. The working environment is relatively harsh, with high environmental noise and a lot of dust, which affects the physical health of workers. Usually, 6 to 8 people are required to cooperate for grinding the front hood of automotive parts on-site. The grinding time is long and the grinding efficiency is low. At the same time, manual grinding cannot control the grinding depth, and it is easy to have inconsistent product grinding. Summary of the Invention

[0003] The purpose of the present invention is to provide a water circulation grinding line for the front hood of automotive parts, which can perform wet grinding on the product, reduce labor costs, reduce dust pollution, and at the same time can control the grinding depth to ensure the consistency of product grinding.

[0004] To achieve the above purpose, the present invention provides a water circulation grinding line for the front hood of automotive parts, including:

[0005] A double-layer feeder;

[0006] A grinding assembly, provided with a plurality of grinding robots, each of the grinding robots is provided with a grinding head, and the plurality of grinding robots cooperate to grind the product;

[0007] A plurality of wet grinding machine platforms, corresponding to the plurality of grinding robots one by one. Each wet grinding machine platform is provided with at least one spray pipe for wetting the product to reduce dust pollution during product grinding;

[0008] A transfer assembly, provided with a plurality of transfer racks. Each transfer rack is arranged between two adjacent grinding robots for transferring the product between two adjacent grinding robots;

[0009] A force control system, connected to the plurality of grinding robots, for adjusting the grinding pressure of the grinding head according to the preset value of the grinding depth of the product to ensure the consistency of product grinding.

[0010] Optionally, the grinding pressure of the grinding head is obtained by the following formula:

[0011] P = k×d×√H×sin(θ)

[0012] Wherein, p is the grinding pressure of the grinding head, k is the influence coefficient, d is the preset value of the grinding depth of the product, H is the hardness of the product, and θ is the angle between the grinding head and the product grinding surface.

[0013] Optionally, the grinding assembly is provided with at least one first grinding robot, at least one second grinding robot, and at least one third grinding robot.

[0014] Optionally, the first grinding robot is used to grind the four corners and the neck of the front side of the product and flip the product after grinding; the second grinding robot is used to grind the burrs of the special-shaped holes on the back side of the product; the third grinding robot is used to grind the burrs of the ejector pins.

[0015] Optionally, the water circulation grinding line for the front cover of the automotive part further includes:

[0016] A draining line, arranged behind the third grinding robot, and a dryer is arranged on the draining line;

[0017] The water circulation grinding line for the front cover of the automotive part is arranged such that after the third grinding robot finishes grinding the product, the product is flipped and placed on the draining line for draining and drying.

[0018] Optionally, the grinding head of the first grinding robot is provided with grinding sandpaper, and the grinding head of the second grinding robot is provided with grinding sandpaper.

[0019] Optionally, the water circulation grinding line for the front cover of the automotive part further includes:

[0020] At least two grinding sandpaper replacement assemblies, respectively arranged around the first grinding robot and the second grinding robot, and the grinding sandpaper replacement assembly includes a paper tearing assembly and a sandpaper feeding assembly.

[0021] Optionally, the paper tearing assembly includes:

[0022] A support frame;

[0023] A paper hooking member, arranged on the support frame, and an inclined angle is formed at its end to extend into the gap between the grinding head and the grinding sandpaper;

[0024] A paper tearing cylinder, arranged on the support frame, and a paper clamping member is arranged at the movable end of the paper tearing cylinder. The paper tearing assembly is arranged such that after the paper hooking member extends into the gap between the grinding head and the grinding sandpaper, the movable end of the paper tearing cylinder extends to press the paper clamping member against the paper hooking member to clamp the grinding sandpaper so that the grinding robot moves to tear off the grinding sandpaper.

[0025] Optionally, the sandpaper feeding assembly includes:

[0026] A sandpaper stack, formed by stacking a plurality of the grinding sandpapers through Velcro bonding;

[0027] A fixing frame, used to place the sandpaper stack;

[0028] The feeding cylinder is arranged at the bottom of the fixed frame. When the grinding head for tearing the grinding sandpaper moves to the top of the fixed frame, the movable end of the feeding cylinder extends to push out the stack of sandpapers so that a single grinding sandpaper adheres to the grinding head to complete the sandpaper replacement.

[0029] The beneficial effects of the present invention are as follows: The product is wet-ground by the grinding assembly in cooperation with the wet grinding machine table, reducing labor costs and dust pollution. At the same time, the grinding depth is controlled by the force control system to ensure the consistency of product grinding.

[0030] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly and implement it according to the content of the description, the following takes the preferred embodiments of the present invention and describes them in detail in conjunction with the accompanying drawings as follows. Description of the Drawings

[0031] Figure 1 It is a schematic structural diagram of the water circulation grinding line for the front hood of an automotive part shown in an embodiment of the present invention;

[0032] Figure 2 It is a partial schematic structural diagram of the water circulation grinding line for the front hood of an automotive part shown in an embodiment of the present invention;

[0033] Figure 3 It is a schematic structural diagram of the grinding sandpaper replacement assembly of the water circulation grinding line for the front hood of an automotive part shown in an embodiment of the present invention;

[0034] Figure 4 It is a schematic structural diagram of the paper tearing assembly of the water circulation grinding line for the front hood of an automotive part shown in an embodiment of the present invention;

[0035] In the figure: 1. Double-layer feeder; 2. Grinding assembly; 21. Grinding robot; 211. First grinding robot; 212. Second grinding robot; 213. Third grinding robot; 22. Grinding head; 3. Wet grinding machine table; 31. First wet grinding machine table; 32. Second wet grinding machine table; 33. Third wet grinding machine table; 4. Transfer assembly; 41. Transfer frame; 411. First transfer frame; 412. Second transfer frame; 413. Third transfer frame; 5. Drainage line; 6. Dryer; 7. Grinding sandpaper replacement assembly; 71. Support table; 72. Paper tearing assembly; 721. Support frame; 722. Paper hooking part; 723. Paper tearing cylinder; 724. Paper clamping part; 73. Sandpaper feeding assembly; 731. Stack of sandpapers; 732. Fixed frame; 733. Feeding cylinder. Detailed Embodiments

[0036] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the technical features involved in the implementation manners can be combined with each other as long as they do not conflict with each other.

[0039] Please refer to Figure 1 and Figure 2 As shown in a preferred embodiment of the present application, the water circulation grinding line for the front cover of an automotive part includes a double-layer feeder 1, a grinding assembly 2, a plurality of wet grinding machine platforms 3, a transfer assembly 4, and a force control system. The grinding assembly 2 is provided with a plurality of grinding robots 21, and the grinding robots 21 are provided with grinding heads 22. The plurality of grinding robots 21 cooperate to grind the product. The plurality of wet grinding machine platforms 3 correspond to the plurality of grinding robots 21 one by one. Each single wet grinding machine platform 3 is provided with at least one spray pipe for wetting the product to reduce the dust pollution during product grinding. The transfer assembly 4 is provided with a plurality of transfer racks 41. Each single transfer rack 41 is arranged between two adjacent grinding robots 21 for transferring the product between two adjacent grinding robots 21. The force control system is connected to the plurality of grinding robots 21 and is used to adjust the grinding pressure of the grinding head 22 according to the preset value of the grinding depth of the product to ensure the consistency of product grinding.

[0040] According to the solution of the embodiment of the present invention, the product is wet-ground by the cooperation of the grinding assembly 2 and the wet grinding machine platform 3, reducing the labor cost and the dust pollution. At the same time, the grinding depth is controlled by the force control system to ensure the consistency of product grinding.

[0041] The following will be described in detail with specific embodiments:

[0042] Since the product to be polished in this application is the front hood of an automotive part, and the four corners and the neck of the front hood of the automotive part are uneven curved surfaces, when polishing the product, the polishing depth of the product is affected by multiple factors such as the hardness of the product, the angle between the polishing head 22 and the polishing surface of the product, and the polishing pressure of the polishing head 22. Among them, the hardness of the product is a fixed value, and the angle between the polishing head 22 and the polishing surface of the product is also a fixed value set in advance through a control program. Therefore, in order to control the polishing depth of the product and ensure the consistency of product polishing, it is necessary to adjust the polishing pressure of the polishing head 22 according to the preset polishing depth value through a force control system.

[0043] The polishing pressure of the polishing head 22 of the polishing robot 21 is obtained through the following formula:

[0044] P = k × d × √H × sin(θ)

[0045] Where P is the polishing pressure of the polishing head 22, k is the influence coefficient, d is the preset polishing depth value of the product, H is the hardness of the product, and θ is the angle between the polishing head 22 and the polishing surface of the product. After the operator inputs the corresponding parameters, the force control system can automatically calculate the value of the polishing force, which is more convenient for the operator to operate the equipment and at the same time avoids the risk of errors caused by the operator calculating the value by himself.

[0046] Please refer to Figure 1 , in this embodiment, the polishing assembly 2 is provided with a first polishing robot 211, a second polishing robot 212, and two third polishing robots 213, and four wet polishing machine tables 3 are correspondingly provided, and three transfer racks 41 are correspondingly provided. Specifically, the first polishing robot 211, the second polishing robot 212, and the two third polishing robots 213 are sequentially arranged at intervals from left to right at a position close to the double-layer feeder 1. Correspondingly, the wet polishing machine table 3 includes a first wet polishing machine table 31, a second wet polishing machine table 32, and two third wet polishing machine tables 33. Among them, the first wet polishing machine table 31 corresponds to the first polishing robot 211, the second wet polishing machine table 32 corresponds to the second polishing robot 212, and the two third wet polishing machine tables 33 correspond to the two third polishing robots 213 one by one. The transfer rack 41 includes a first transfer rack 411, a second transfer rack 412, and a third transfer rack 413. Among them, the first transfer rack 411 is located between the first polishing robot 211 and the second polishing robot 212, the second transfer rack 412 is located between the second polishing robot 212 and the first third polishing robot 213, and the third transfer rack 413 is located between the two third polishing robots 213.

[0047] The first grinding robot 211 is used to grind the four corners and the neck of the front side of the product and flip the product after grinding; the second grinding robot 212 is used to grind the burrs of the irregular holes on the reverse side of the product; since there are a large number of ejector pins on the product, in this application, two third grinding robots 213 cooperate to grind the burrs of the ejector pins.

[0048] The water circulation grinding line for the front cover of the automotive part further includes a draining line 5, which is arranged behind the second third grinding robot 214, and a dryer 6 is arranged on the draining line 5. The water circulation grinding line for the front cover of the automotive part is configured to flip the product after the second third grinding robot 214 finishes grinding the product and place the product on the draining line 5 for draining and drying.

[0049] Please refer to Figures 1 to 3 , in this embodiment, the grinding head 22 of the first grinding robot 211 is provided with grinding sandpaper, and the grinding head 22 of the second grinding robot 212 is provided with grinding sandpaper. The water circulation grinding line for the front cover of the automotive part further includes at least two grinding sandpaper replacement components 7, which are respectively arranged around the first grinding robot 211 and the second grinding robot 212. The grinding sandpaper replacement component 7 includes a support platform 71, a paper tearing component 72 and a sandpaper feeding component 73, and both the paper tearing component 72 and the sandpaper feeding component 73 are arranged on the support platform 71. In this embodiment, there are two grinding sandpaper replacement components 7, which are respectively arranged on the first transfer rack 411 and the second transfer rack 412 through the support platform 71.

[0050] Please refer to Figure 4 , the paper tearing component 72 includes a support frame 721, a paper hooking part 722 and a paper tearing cylinder 723. The support frame 721 is arranged on the support platform 71, the paper hooking part 722 is arranged on the support frame 721, and its end is provided with an oblique angle to extend into the gap between the grinding head 22 and the grinding sandpaper. The paper tearing cylinder 723 is arranged on the support frame 721, and a paper clamping part 724 is arranged at the movable end of the paper tearing cylinder 723. The paper tearing component 72 is configured such that after the paper hooking part 722 extends into the gap between the grinding head 22 and the grinding sandpaper, the movable end of the paper tearing cylinder 723 extends to press the paper clamping part 724 against the paper hooking part 722 to clamp the grinding sandpaper so that the grinding robot 21 moves to tear off the grinding sandpaper. In this embodiment, there are two paper tearing cylinders 723, and the two paper tearing cylinders 723 are arranged oppositely and respectively correspond to two adjacent grinding robots 21.

[0051] Please refer to Figure 3 and Figure 4, the sandpaper loading component 73 includes a sandpaper stack 731, a fixing frame 732, and a loading cylinder 733. The sandpaper stack 731 is formed by stacking multiple abrasive sandpapers adhered together with Velcro. The fixing frame 732 is arranged on the support table 71 and is used to place the sandpaper stack 731. The loading cylinder 733 is arranged at the bottom of the fixing frame 732. The loading cylinder 733 is configured such that when the grinding head 22 that tears off the abrasive sandpaper moves to the top of the fixing frame 732, the movable end of the loading cylinder 733 extends to push out the sandpaper stack 731 so that a single abrasive sandpaper adheres to the grinding head 22 to complete the sandpaper replacement. In this embodiment, there are also two sandpaper loading components 73, corresponding to two adjacent grinding robots 21 respectively. The fixing frame 732 is arranged vertically, and the loading cylinder 733 is arranged below the fixing frame 732 and its movable end can pass through the support table 71 to push out the sandpaper stack 731 in the fixing frame 732 upward.

[0052] When the first grinding robot 211 or the second grinding robot 212 performs grinding processing for a preset time or a preset quantity and needs to replace the abrasive sandpaper on the grinding head 22, the grinding robot 21 moves the grinding head 22 to the paper-hooking member 722 of the corresponding paper-tearing component 72. Since the abrasive sandpaper adheres to the grinding head 22 through Velcro, there is a gap between the abrasive sandpaper and the grinding head 22. At this time, the grinding robot 21 controls the movement of the grinding head 22 so that the paper-hooking member 722 is inserted into the gap between the abrasive sandpaper and the grinding head 22. Then, the movable end of the paper-tearing cylinder 723 extends to press the paper-clamping member 724 against the paper-hooking member 722 to clamp the abrasive sandpaper so that the grinding robot 21 moves backward to tear off the abrasive sandpaper. Immediately afterwards, the grinding robot 21 moves the grinding head 22 directly above the fixing frame 732 and makes the end face of the grinding head 22 horizontal. Then, the movable end of the loading cylinder 733 extends upward to push out the sandpaper stack 731 so that a single abrasive sandpaper adheres to the grinding head 22 to complete the sandpaper replacement.

[0053] In this embodiment, the working process of the water circulation grinding line for the front cover of the automotive part is as follows:

[0054] First, manually load the product onto the double-layer feeder 1. Then, the first grinding robot 211 sucks a piece of product from the double-layer feeder 1 through the suction head and places it on the first wet grinding machine table 31 to perform wet grinding on the four corners and the neck of the front side of the product. After grinding, the first grinding robot 211 flips the product and places it on the first transfer rack 411. The second grinding robot 212 sucks the product from the first transfer rack 411 and places it on the second wet grinding machine table 32 to perform wet grinding on the burrs of the special-shaped holes on the reverse side of the product. After grinding, the second grinding robot 212 places the product on the second transfer rack 412. The first third grinding robot 213 sucks the product from the second transfer rack 412 and places it on the third wet grinding machine table 33 to perform wet grinding on some of the ejector pin burrs on the product. After grinding, the first third grinding machine places the product on the third transfer rack 413. The second third grinding robot 214 sucks the product from the third transfer rack 413 and places it on the second third wet grinding machine table 34 to perform wet grinding on the remaining ejector pin burrs on the product. After grinding, the second third grinding robot 214 flips the product and places it on the draining line 5 for draining and drying. The product after draining and drying flows out onto the return assembly line, and the ground product is collected manually.

[0055] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0056] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. The water circulation grinding line for the front cover of automotive parts is characterized in that Including: Double-layer feeder; Grinding assembly, provided with a plurality of grinding robots, each of the grinding robots is provided with a grinding head, and the plurality of grinding robots cooperate to grind the product; A plurality of wet grinding machines, corresponding to the plurality of grinding robots one by one, and each single wet grinding machine is provided with at least one nozzle for wetting the product to reduce dust pollution during product grinding; Transfer assembly, provided with a plurality of transfer racks, and each single transfer rack is arranged between two adjacent grinding robots for transferring the product between two adjacent grinding robots; Force control system, connected to the plurality of grinding robots, for adjusting the grinding pressure of the grinding head according to the preset value of the grinding depth of the product to ensure the consistency of product grinding.

2. The water circulation grinding line for the front hood of the automotive part according to claim 1, wherein The grinding pressure of the grinding head is obtained by the following formula: P = k × d × √H × sin(θ) Wherein, p is the grinding pressure of the grinding head, k is the influence coefficient, d is the preset value of the grinding depth of the product, H is the hardness of the product, and θ is the angle between the grinding head and the grinding surface of the product.

3. The water circulation grinding line for the front cover of the automotive parts according to claim 1, characterized in that The grinding assembly is provided with at least one first grinding robot, at least one second grinding robot, and at least one third grinding robot.

4. The water circulation grinding line for the front cover of automotive parts according to claim 3, wherein The first grinding robot is used for grinding the four corners and the neck of the front side of the product and flipping the product after grinding; the second grinding robot is used for grinding the burrs of the special-shaped holes on the reverse side of the product; the third grinding robot is used for grinding the burrs of the ejector pins.

5. The water circulation grinding line for the front hood of an automotive part according to claim 4, characterized in that, It also includes: Draining line, arranged behind the third grinding robot, and the draining line is provided with a dryer; The front cover water circulation grinding line of the automotive part is arranged such that after the third grinding robot finishes grinding the product, the product is flipped and placed on the draining line for draining and drying.

6. The water circulation grinding line for the front hood of the automotive parts according to claim 3, characterized in that The grinding head of the first grinding robot is provided with grinding sandpaper, and the grinding head of the second grinding robot is provided with grinding sandpaper.

7. The water circulation grinding line for the front cover of automotive parts according to claim 6, characterized in that, It also includes: At least two grinding sandpaper replacement assemblies, respectively arranged around the first grinding robot and the second grinding robot, and the grinding sandpaper replacement assembly includes a paper tearing assembly and a sandpaper feeding assembly.

8. The water circulation grinding line for the front cover of automotive parts according to claim 7, wherein The paper tearing assembly includes: Support frame; Paper hooking piece, arranged on the support frame, and its end is provided with an inclined angle to extend into the gap between the grinding head and the grinding sandpaper; Paper tearing cylinder, arranged on the support frame, and the movable end of the paper tearing cylinder is provided with a paper clamping piece. The paper tearing assembly is arranged such that after the paper hooking piece extends into the gap between the grinding head and the grinding sandpaper, the movable end of the paper tearing cylinder extends to press the paper clamping piece against the paper hooking piece to clamp the grinding sandpaper so that the grinding robot moves to tear off the grinding sandpaper.

9. The water circulation grinding line for the front cover of the automotive parts according to claim 7, characterized in that The sandpaper feeding assembly includes: Sandpaper stack, formed by stacking a plurality of the grinding sandpapers through Velcro bonding; Fixed frame, for placing the sandpaper stack; Feeding cylinder, arranged at the bottom of the fixed frame, and the feeding cylinder is arranged such that when the grinding head that has torn off the grinding sandpaper moves to the top of the fixed frame, the movable end of the feeding cylinder extends to push out the sandpaper stack so that a single grinding sandpaper adheres to the grinding head to complete sandpaper replacement.

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