A spraying device for the treatment of stone surfaces

Abstract

The utility model discloses a kind of spraying devices for stone surface treatment, including conveying belt, lifting device, protective cover.The lifting device is equipped under the conveying belt, vertical positioning stone by lifting cylinder driving lifting plate, realize synchronous transmission in combination with transplanting belt;Positioning baffle that can be adjusted horizontally is installed in conveying belt side, and stepless width adjustment is carried out by circular base and adjusting bolt.Protective cover is equipped with three-axis joint robot and linear guide module, drive spray gun to execute multi-degree-of-freedom spraying, cooperate vision camera to generate path in real time with stone profile is collected, support the full-automatic processing of thickness 20-300mm stone.The utility model realizes millimeter level spraying precision by visual positioning and trajectory optimization, special-shaped stone coverage rate is greater than or equal to 99%, and comprehensive spraying speed reaches 5-8 times of artificial, suitable for the automatic spraying of protective agent of granite and other stones.

Description

Technical Field

[0001] This utility model relates to the field of stone surface treatment technology, and in particular to a spraying device for stone surface treatment. Background Technology

[0002] After being mined, granite usually needs to undergo multiple processing steps to be made into granite slabs or blocks of different specifications to suit different usage environments. In the production and processing of granite slabs, spraying equipment is needed to spray protective coatings and paints onto the processed granite slabs.

[0003] Existing stone protection processes rely on manual, segmented spraying, which has the following drawbacks: 1. Low efficiency: It requires repeated handling of the stone and segmented operation, with a single piece processing time of more than 120 seconds; 2. Unstable quality: Manual spraying is prone to edge omissions and uneven coating thickness (CV value > 15%), with a pass rate of ≤ 85%. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a spraying device for stone surface treatment.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] This utility model discloses a spraying device for stone surface treatment, comprising a conveyor belt and a protective cover. A lifting device is installed below the conveyor belt to lift the stone on the conveyor belt. The lifting device includes a transfer belt, a tensioning wheel, a lifting cylinder, and a drive motor. A laterally adjustable positioning baffle is provided on one side of the conveyor belt. The positioning baffle is fixed by an adjustable base, which includes a circular base and an adjusting bolt. The adjusting bolt is threaded into the circular base, and its end abuts against the lateral position of the positioning baffle. Rotating the adjusting bolt pushes the positioning baffle to move laterally. A blocking cylinder is provided at the front and rear of the lifting device along the conveyor belt's transport direction. This cylinder is linked to a photoelectric sensor and triggers the lifting device to operate upon detecting the stone's position. A protective spray gun is provided inside the protective cover and connected to an articulated robot. The articulated robot is connected to the protective cover via a linear motion mechanism. A vision camera and a controller are also fixed on the protective cover. The positioning information is transmitted to the controller, which is signal-connected to the vision camera, the lifting device, the blocking cylinders, and the articulated robot.

[0007] As a preferred technical solution of this utility model, the lifting device further includes a guide shaft, a main fixing plate, and a lifting plate. One end of the guide shaft is fixed to the main fixing plate through a guide seat, and the other end is fixedly connected to the lifting plate. The main fixing plate is connected to the bottom of the conveyor belt. The base of the lifting cylinder is fixed to the main fixing plate, and its movable end is fixedly connected to the lifting plate for driving the lifting plate to move up and down.

[0008] In a preferred embodiment of this invention, the drive motor is connected to the lifting plate via a fixed plate, and its output shaft is connected to the gear on the side of the tensioning wheel via a gear meshing transmission.

[0009] As a preferred technical solution of this utility model, the articulated robot has at least three degrees of freedom and can drive the protective spray gun to perform multi-degree-of-freedom motion, and the linear motion mechanism is a linear guide rail module.

[0010] As a preferred embodiment of this utility model, a safety light curtain is also fixedly installed on the side of the protective cover.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. The vision camera and controller work together to achieve millimeter-level positioning accuracy, which can identify the edge and curved surface features of the stone, solve the spraying deviation problem caused by traditional mechanical positioning, and correct the spray gun trajectory in real time through the controller to ensure that the spraying coverage of irregular stone edges and corners is ≥99% (manual spraying is only 85-90%); the horizontal positioning baffle adjustment combined with the lifting device stroke adjustment can adapt to stone with a thickness of 20-300mm.

[0013] 2. Articulated robots combined with linear guides enable multi-degree-of-freedom spraying path planning, achieving a spraying speed of 1-3 m / s, which is 5-8 times more efficient than manual spraying. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is the front view of this utility model;

[0017] Figure 3 This is a side view of the present invention;

[0018] Figure 4 This is a schematic diagram of the conveyor belt structure in this utility model;

[0019] Figure 5 This is a schematic diagram of the lifting device in this utility model;

[0020] In the diagram: 1. Conveyor belt; 2. Lifting device; 3. Protective cover; 4. Positioning baffle; 5. Adjustable base; 6. Blocking cylinder; 7. Protective spray gun; 8. Articulated robot; 9. Linear motion mechanism; 10. Vision camera; 11. Controller; 12. Circular base; 13. Adjusting bolt; 14. Safety light curtain; 21. Transplanting belt; 22. Tensioning wheel; 23. Lifting cylinder; 24. Drive motor; 25. Guide shaft; 26. Main fixing plate; 27. Lifting plate. Detailed Implementation

[0021] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0022] In the attached diagram, all identical reference numerals refer to the same components.

[0023] like Figure 1-5 As shown, this utility model provides a spraying device for stone surface treatment, comprising:

[0024] Conveyor Belt 1: A horizontally positioned, anti-slip rubber conveyor belt with an 800mm wide surface. Driven by a variable frequency motor, its speed is adjustable from 0.1 to 1.5 m / min, and its load-bearing capacity is ≥500 kg / m². It is used for continuous transport of rough stone. A lifting device 2 is installed directly below Conveyor Belt 1, with their center lines aligned to ensure even force distribution during stone lifting.

[0025] Lifting device 2 includes guide shafts 25, a main fixing plate 26, a lifting cylinder 23, and a drive motor 24. The main fixing plate 26 is bolted to the bottom of the conveyor belt 1 frame, and the lifting device 2 coincides with the center line of the conveyor belt 1. Four guide shafts 25 (30mm in diameter and 500mm in length) are vertically mounted on it, and the top of the guide shafts is connected to the lifting plate 27 via flanges. The lifting cylinder 23 (model SC160x500, stroke 300mm) is vertically mounted at the center of the main fixing plate 26, and the piston rod end is fixed to the lifting plate 27, providing a lifting force of 20kN and a positioning accuracy of ±0.1mm. A transplanting belt 21 (400mm wide) is mounted on the lifting plate 27. The drive motor 24 meshes with the gear at the end of the tensioning wheel 22 through gears to drive the transplanting belt 21 and adjust its running speed and tension.

[0026] Positioning baffle 4: Fixed to the side of conveyor belt 1 by an adjustable base 5, which includes a circular base 12 and an M12 adjusting bolt 13. Rotating the adjusting bolt 13 pushes the baffle 4 to move laterally, with a stroke of ±10mm, to achieve precise positioning in the width direction of the stone.

[0027] The circular base 12 of the adjustable base 5 is fixed to the fixed frame of the conveyor belt 1 by anchor bolts. It is equipped with an M8 fine thread adjusting bolt 13 (pitch 1.25mm). A nylon top block is installed at the end of the bolt. Rotating the bolt can push the positioning baffle 4 to move laterally, with an adjustment range of ±150mm.

[0028] Blocking cylinder 6: Symmetrically arranged at the front and rear ends of the conveyor belt 1, it forms a 0.5m wide photoelectric sensing area in conjunction with the photoelectric sensor, detects the position of the stone edge and triggers the linkage action of the lifting device 2 and the positioning baffle 4.

[0029] Protective Cover 3: A sealed steel chamber made of 304 stainless steel, positioned above conveyor belt 1, integrating a protective spray gun 7, a three-degree-of-freedom articulated robot 8, and a linear motion mechanism 9. Protective Cover 3 is equipped with a negative pressure dust removal system with a dust concentration ≤20mg / m³ and a laser safety light curtain 14 with a response time ≤0.3 seconds.

[0030] Spray gun 7: High-pressure airless spray gun, connected to a high-pressure airless spray pump (pressure adjustable from 0.3 to 0.6 MPa), and installed on the end flange of the robot via a quick-connect coupling.

[0031] Articulated Robot 8: A three-degree-of-freedom collaborative robot with a spray gun 7 mounted at the end effector. It has a repeatability of ±0.1mm, a maximum load of 5kg, and a movement speed of ≤1.2m / s. The Articulated Robot 8 achieves precise spraying of curved and engraved textures through flexible movement.

[0032] Linear motion mechanism 9: It adopts a ball linear guide module with a stroke of 300mm and a repeatability of ±0.02mm. It is arranged along the length of the conveyor belt 1, so that the robot can cover the entire spraying area.

[0033] Vision camera 10: 5-megapixel industrial camera with a positioning accuracy of ±0.2mm, meeting the millimeter-level spraying accuracy requirements. It is installed at the top center of the protective cover 3 with the lens pointing vertically downwards. The field of view covers an area of ​​1.5m x 1m. It communicates with the controller 11 via a bus to acquire three-dimensional images of the stone in real time and generate a spraying path.

[0034] Controller 11: An industrial PLC and industrial computer receive camera images in real time, extracts the stone contour with a positioning accuracy of ±0.2mm, and generates a spraying path code to send to the robot. It coordinates the timing of the lifting device 2, the blocking cylinder 6, and the robot 8, and supports offline programming and online correction functions.

[0035] The method of using this utility model is as follows:

[0036] 1. Feeding and positioning: The stone is conveyed to the photoelectric sensing area formed by the blocking cylinder 6 via the conveyor belt 1. After the sensor detects the edge of the stone, it triggers a stop signal. The lifting cylinder 23 drives the lifting plate 27 to rise to the preset height. At the same time, the positioning baffle 4 is finely adjusted in lateral position by adjusting the bolt 13 to ensure that the stone is centered and maintains the best spraying distance with the spray gun 7.

[0037] 2. Spraying path planning: The vision camera 10 performs sub-pixel level (<0.01mm) 3D imaging of the stone surface, generates a model and calculates the spraying path; the controller 11 sends motion commands to the articulated robot 8 based on the path planning results, and adjusts the flow rate and pressure of the spray gun 7 in real time.

[0038] 3. Spraying operation: The articulated robot 8 moves the spray gun 7 along the trajectory of the linear motion mechanism 9, and the spraying error is ±1% using a constant flow rate; during the spraying process, the vision camera 10 continuously monitors the coating thickness, and if the deviation exceeds the threshold, the controller 11 automatically corrects the motion path of the articulated robot 8.

[0039] 4. Quality inspection and unloading: After the spraying is completed, the visual system re-inspects the coating uniformity CV value ≤5%. Unqualified products are separated by the rejection mechanism; qualified products are transported out of the protective cover 3 via conveyor belt 1 and enter the drying process. The exhaust gas is treated by the negative pressure dust removal system and discharged in compliance with standards.

[0040] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A spraying device for stone surface treatment, comprising: The conveyor belt (1) and protective cover (3) are characterized in that a lifting device (2) is installed below the conveyor belt (1), the lifting device (2) includes a transplanting belt (21), a tensioning wheel (22), a lifting cylinder (23) and a drive motor (24); a laterally adjustable positioning baffle (4) is provided on one side of the conveyor belt (1), the positioning baffle (4) is fixed by an adjustable base (5), the adjustable base (5) includes a circular base (12) and an adjusting bolt (13), the adjusting bolt (13) is threadedly engaged with the circular base (12) and its end abuts against the lateral position of the positioning baffle (4), and the positioning baffle (4) is moved laterally by rotating the adjusting bolt (13); the lifting device (2) A blocking cylinder (6) is provided at the front and rear along the conveyor belt (1) in the conveying direction. It is linked with the photoelectric sensor and triggers the lifting device (2) to act after detecting the position of the stone. A protective spray gun (7) is provided inside the protective cover (3). The protective spray gun (7) is connected to the articulated robot (8). The articulated robot (8) is connected to the protective cover (3) through the linear motion mechanism (9). A vision camera (10) and a controller (11) are also fixed on the protective cover (3). The vision camera (10) is used to take pictures and locate the stone and transmit the location information to the controller (11). The controller (11) is connected to the vision camera (10), the lifting device (2), the blocking cylinder (6) and the articulated robot (8) by signal.

2. The spraying device for stone surface treatment according to claim 1, characterized in that, The lifting device (2) further includes a guide shaft (25), a main fixing plate (26) and a lifting plate (27). One end of the guide shaft (25) is fixed to the main fixing plate (26) through a guide seat, and the other end is fixedly connected to the lifting plate (27). The main fixing plate (26) is connected to the bottom of the conveyor belt (1). The base of the lifting cylinder (23) is fixed to the main fixing plate (26), and its movable end is fixedly connected to the lifting plate (27) to drive the lifting plate (27) to move up and down.

3. A spraying device for stone surface treatment according to claim 2, characterized in that, The drive motor (24) is connected to the lifting plate (27) through a fixed plate, and its output shaft is connected to the gear on the side of the tension wheel (22) through a gear meshing transmission.

4. The spraying device for stone surface treatment according to claim 1, characterized in that, The articulated robot (8) has three degrees of freedom and can drive the protective spray gun (7) to perform multi-degree-of-freedom motion. The linear motion mechanism (9) is a linear guide rail module.

5. A spraying device for stone surface treatment according to claim 1, characterized in that, A safety light curtain (14) is also fixedly installed on the side of the protective cover (3).

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