Multi-chamber explosion spraying laser-assisted positioning device and method

Abstract

The invention discloses a multi-chamber explosion spraying laser auxiliary positioning device and method, and belongs to the field of auxiliary positioning of thermal spraying equipment such as multi-chamber explosion spraying. The device comprises a line laser, a supporting frame, a movable support, a connecting rod, a point laser and a sliding block. The line lasers are evenly arranged around the supporting frame and are perpendicular to the end face of the supporting frame. Movable supports are symmetrically arranged on the two sides of the supporting frame and connected with the sliding blocks through two connecting rods respectively, and point lasers are arranged on the movable supports. The device is fixed to the multi-chamber explosion spraying gun through the supporting frame, the sliding block can move up and down on the surface of the explosion spraying gun, the angle of the movable support is driven to change through the connecting rod, and the laser angles of the two point lasers are synchronously adjusted. According to the method, the center position and the spraying distance of the multi-chamber explosion spraying gun can be rapidly and accurately positioned at low cost, and the problems that the multi-chamber explosion equipment cannot be rapidly and accurately positioned and can not be used online in an existing method are solved.

Description

Technical Field

[0001] This invention belongs to the field of auxiliary positioning for thermal spraying equipment such as multi-chamber explosive spraying, and particularly relates to a method for low-cost, rapid and accurate positioning and distance determination of spraying equipment, specifically relating to a laser-assisted positioning device and method for multi-chamber explosive spraying. Background Technology

[0002] When programming the travel path for multi-chamber explosive spraying, the starting point, ending point, and process trajectory of the spraying must be programmed. Generally, programming involves inserting a soft rod (wood, plastic, or soft metal such as aluminum or copper) into the gun barrel, with the outer diameter of the rod similar to the inner diameter of the barrel, and a certain length of the rod's bottom protruding as the nozzle position for program positioning. Because the rod and the spray gun do not perfectly fit together, there is a gap between them, and the centerline of the rod does not coincide with the centerline of the gun barrel, leading to inaccurate positioning. For these reasons, to ensure complete coverage of the sprayed area, a certain margin must be left at the starting and ending points of the spraying program, resulting in extended spraying time and waste of powder and energy. If the workpiece being sprayed is a polygonal plane, even more material is wasted due to inaccurate positioning. Furthermore, when workpieces have inconsistent heights, they can generally only be sprayed at the same height, making it difficult to guarantee coating uniformity.

[0003] Another positioning method involves attaching a dot laser to the spray gun head to indicate the center of the spray gun. However, this method cannot be used while the spray gun is in operation; it must be removed before operation, otherwise the indicator may burn out. Furthermore, this method cannot indicate the spraying distance. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a multi-chamber explosion spraying laser-assisted positioning device and method to achieve rapid positioning and distance determination during the spraying process.

[0005] The objective of this invention is achieved through the following technical solution: a multi-chamber explosive spraying laser-assisted positioning device, comprising: a line laser, a support frame, a movable bracket, a connecting rod, a point laser, and a slider; The device comprises four line lasers, evenly distributed around the support frame and perpendicular to the end face of the support frame. The support frame has symmetrical movable brackets on both sides, each connected to a slider via two connecting rods. A point laser is mounted on each movable bracket. The device is fixed to a multi-chamber explosive spray gun via the support frame. The slider can move up and down on the surface of the explosive spray gun and, through the connecting rods, changes the angle of the movable brackets, thus simultaneously adjusting the laser angles of the two point lasers.

[0006] Furthermore, the support frame and slider are provided with openings and are fixed to the multi-chamber explosive spray gun by a screw locking mechanism. The position of the slider on the multi-chamber explosive spray gun can be adjusted by adjusting the tightness of the screw locking mechanism.

[0007] Furthermore, the projection position of the point laser emitted by the point laser on the surface to be sprayed coincides with the projection position of the central axis of the multi-chamber explosive spray gun. The distance between the point laser emitter and the spraying point is calculated by the angle between the point laser and the central axis of the multi-chamber explosive spray gun, and the distance between the point laser emitter and the central axis of the multi-chamber explosive spray gun.

[0008] Furthermore, an angle dial is provided at the connection between the support frame and the movable bracket to quickly display the angle between the support frame and the movable bracket, so as to obtain the angle between the point laser and the central axis of the multi-chamber explosive spray gun. Based on the known angle, the distance between the point laser emitter and the central axis of the multi-chamber explosive spray gun is calculated by using the trigonometric tangent formula and arctangent function.

[0009] Furthermore, the device also includes a control system and a display screen, which directly displays the distance between the point laser emitter and the central axis of the multi-chamber explosive spray gun by inputting the angle between the support frame and the movable bracket.

[0010] Furthermore, the line laser emitted by the line laser passes through the projection position of the central axis of the multi-chamber explosive spray gun onto the surface to be sprayed. The line lasers emitted by two line lasers spaced 180° apart overlap, and the line lasers emitted by the four line lasers form a cross laser line at the center position of the multi-chamber explosive spray gun. The direction of the line laser is the xy axis movement direction of the multi-chamber explosive spray gun.

[0011] This invention also provides a laser-assisted positioning method for multi-chamber explosive spraying, comprising the following steps: S1. A laser beam is emitted forward from each side of the port of the multi-chamber explosive spray gun using a point laser. The position of the slider is adjusted, and the movable bracket is driven by the connecting rod to synchronously adjust the angle of the two laser beams until the projection positions of the two laser beams on the surface to be sprayed on the central axis of the multi-chamber explosive spray gun coincide. The slider is fixed, and the distance between the spray gun nozzle and the surface to be sprayed is calculated by measuring the angle α between the laser beam and the central axis of the spray gun, and the straight distance d1 between the laser beam emission end and the central axis of the spray gun. S2. Four linear laser beams are emitted by four line lasers from concentric circles centered on the center point of the spray gun on the end face of the multi-chamber explosive spray gun. The laser projections form a cross intersection on the vertical plane of the spray gun, and this intersection is the center point of the spray gun. S3. Spraying is performed based on the center point of the spray gun and the distance between the spray gun nozzle and the surface to be sprayed.

[0012] Furthermore, the angle between the laser beam and the central axis of the spray gun is read by an angle plate set at the connection between the support frame and the movable bracket. Based on the angle, the distance between the spray gun nozzle and the surface to be sprayed is calculated by an external control system.

[0013] The beneficial effects of this invention are: 1. It can perform precise positioning and distance determination. Rapid positioning can reduce preparation work before spraying and speed up the spraying process.

[0014] 2. Quick positioning and distance setting can reduce unnecessary consumption. The spray gun only needs to work on the area that needs to be sprayed, without the need for area over-spraying to ensure that the sprayed area is completely covered.

[0015] 3. For parts with complex shapes and inconsistent heights, this device can maintain a consistent distance from the workpiece at all times, resulting in coatings with uniform thickness and performance.

[0016] 4. Due to accurate positioning and height, the robot's movement trajectory can be programmed according to the shape of workpieces with large height variations, without worrying about collision accidents. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the device of the present invention; Figure 2 This is a schematic diagram of the height positioning of the point laser of the present invention; Figure 3 This is a schematic diagram of the positioning of the line laser to the center of the spray gun in this invention; In the diagram, 1 is a line laser, 2 is a support frame, 3 is a movable bracket, 4 is a connecting rod, 5 is a point laser, and 6 is a slider. Detailed Implementation

[0019] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention as detailed in the appended claims.

[0020] like Figure 1As shown, this embodiment of the invention provides a multi-chamber explosive spraying laser-assisted positioning device, including: a line laser 1, a support frame 2, a movable bracket 3, a connecting rod 4, a point laser 5, and a slider 6.

[0021] The device comprises four line lasers 1, which are evenly arranged around the support frame 2 and perpendicular to the end face of the support frame 2. The support frame 2 is symmetrically provided with movable brackets 3 on both sides, and the movable brackets 3 are connected to sliders 6 through two connecting rods 4. Point lasers 5 are provided on the movable brackets 3. The device is fixed to the multi-chamber explosive spray gun through the support frame 2. The sliders 6 can move up and down on the surface of the explosive spray gun and change the angle of the movable brackets 3 through the connecting rods 4, so as to realize the synchronous adjustment of the laser angle of the two point lasers 5.

[0022] The support frame 2 and the slider 6 are provided with openings and are fixed to the multi-chamber explosive spray gun by a screw locking mechanism. The position of the slider 6 on the multi-chamber explosive spray gun can be adjusted by adjusting the tightness of the screw locking mechanism.

[0023] In a preferred embodiment, the point laser emitted by the point laser 5 coincides with the projection position of the central axis of the multi-chamber explosive spray gun onto the surface to be sprayed. The distance between the emitting end of the point laser 5 and the spraying point is calculated by the angle between the point laser 5 and the central axis of the multi-chamber explosive spray gun, and the distance between the emitting end of the point laser 5 and the central axis of the multi-chamber explosive spray gun.

[0024] The line laser emitted by the line laser 1 passes through the projection position of the central axis of the multi-chamber explosive spray gun onto the surface to be sprayed. The line lasers emitted by two line lasers 1 spaced 180° apart overlap, and the line lasers emitted by the four line lasers 1 form a cross laser line at the center position of the multi-chamber explosive spray gun, and the direction of the line laser is the xy axis movement direction of the multi-chamber explosive spray gun.

[0025] Preferably, when conventionally calculating the distance between the emitter of the point laser 5 and the spraying point, the distance between the emitter of the point laser 5 and the central axis of the multi-chamber explosive spray gun can be measured with a ruler and then calculated accordingly. To achieve rapid distance determination, an angle dial is provided at the connection between the support frame 2 and the movable bracket 3 to quickly display the angle between the support frame 2 and the movable bracket 3, thus obtaining the angle α between the point laser 5 and the central axis of the multi-chamber explosive spray gun. Based on the known angle, the distance d1 between the emitter of the point laser 5 and the central axis of the multi-chamber explosive spray gun is calculated. The distance d2 between the emitter of the point laser 5 and the spraying point is calculated using the trigonometric tangent formula and the arctangent function Tanα=d1 / d2, α=arctand1 / d2. Similarly, the distance between the emitter of the point laser 5 and the nozzle of the spray gun can also be calculated using the known angle and the actual dimensions of the spray gun, the quickly displayed support frame 2, and the movable bracket 3. Adding or subtracting this distance from d2 yields the distance between the nozzle of the spray gun and the point to be sprayed.

[0026] Similarly, given a fixed distance between the spray gun nozzle and the point to be sprayed, the angle α between the point laser 5 and the central axis of the multi-chamber explosive spray gun can be derived from the known distance between the spray gun nozzle and the point to be sprayed by using the trigonometric tangent formula and the arctangent function Tanα=d1 / d2, α=arctand1 / d2.

[0027] Preferably, the device further includes a control system and a display screen. The control system has entered various dimensions of the spray gun and positioning device. By inputting the angle between the support frame 2 and the movable bracket 3, the distance between the emitting end of the point laser 5 and the central axis of the multi-chamber explosive spray gun is directly displayed on the display screen.

[0028] This invention also provides a laser-assisted positioning method for multi-chamber explosive spraying, comprising the following steps: S1. A laser beam is emitted forward from each side of the port of the multi-chamber explosive spray gun via a point laser 5. The position of the slider is adjusted, and the movable bracket 3 is driven by the connecting rod 4 to synchronously adjust the angle of the two laser beams until the projection positions of the two laser beams on the surface to be sprayed on the central axis of the multi-chamber explosive spray gun coincide. The slider 3 is fixed, and the distance between the spray gun nozzle and the surface to be sprayed is calculated by measuring the angle α between the laser beam and the central axis of the spray gun, and the straight distance d1 between the laser beam emission end and the central axis of the spray gun.

[0029] S2. On the end face of the multi-chamber explosive spray gun, four linear laser beams are emitted by four line lasers 1 in concentric circles with the center point of the spray gun as the center. The laser projections form a cross intersection on the vertical plane of the spray gun, and this intersection is the center point of the spray gun.

[0030] S3. Spraying is performed based on the center point of the spray gun and the distance between the spray gun nozzle and the surface to be sprayed.

[0031] Preferably, the angle between the laser beam and the central axis of the spray gun is read by an angle plate set at the connection between the support frame 2 and the movable bracket 3. Based on the angle, the distance between the spray gun nozzle and the surface to be sprayed is calculated by an external control system and displayed on an external display screen.

[0032] As a preferred embodiment, to verify feasibility, the present invention also underwent the following experimental verification: Two point lasers and two line lasers were mounted on a multi-chamber explosive spray gun at the Zhejiang Paton Welding Technology Research Institute. The spray gun has a diameter of 60mm. A support frame with an inner diameter of 60mm, an outer diameter of 80mm, and a thickness of 8mm, along with a slider with a connecting rod, is manufactured and fitted onto the spray gun. Two circular holes spaced 90° apart are drilled in this support frame, and each hole houses a line laser. Each side of the support frame has a movable bracket, on which a point laser is mounted, capable of emitting point laser beams.

[0033] Given that the distance d1 between the point laser and the center of the spray gun is 50mm, and the two point lasers are to coincide at a distance d2 = 60mm from the nozzle of the spray gun, then according to the trigonometric tangent function tanα = d1 / d2, the value of α can be calculated as α = arctan1 / d2 = 39.8°. After installing the lasers, the functions of rapid distance setting and spray gun centering are achieved.

[0034] Furthermore, in addition to being applicable to multi-chamber explosive spraying equipment, the present invention is also applicable to other tubular spray gun thermal spraying equipment.

[0035] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only.

[0036] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope.

Claims

1. A multi-chambered explosive spray coating laser assisted positioning device, characterized by, Include: Line laser (1), support frame (2), movable support (3), connecting rod (4), point laser (5) and slider (6); The line laser (1) is 4 in number, is uniformly arranged on the four sides of the support frame (2), and is perpendicular to the end face of the support frame (2); The movable support (3) is symmetrically arranged on the two sides of the support frame (2), and the movable support (3) is connected with the slider (6) through two connecting rods (4), and the movable support (3) is provided with a point laser (5); The device is fixed on the multi-chamber explosion spraying gun through the support frame (2), the slider (6) can move up and down on the surface of the explosion spraying gun, and the angle of the movable support (3) is changed through the connecting rod (4), so that the laser angles of the two point lasers (5) are synchronously adjusted.

2. The apparatus of claim 1, wherein, Openings are arranged on the support frame (2) and the slider (6), and the device is fixed on the multi-chamber explosion spraying gun through a screw locking mechanism, and the position of the slider (6) on the multi-chamber explosion spraying gun is adjusted by adjusting the tightness of the screw locking mechanism.

3. The apparatus of claim 1, wherein, The projection position of the point laser emitted by the point laser (5) on the central axis of the multi-chamber explosion spraying gun on the surface to be sprayed coincides, the angle between the point laser (5) and the central axis of the multi-chamber explosion spraying gun, and the distance between the emitting end of the point laser (5) and the central axis of the multi-chamber explosion spraying gun are calculated to obtain the distance between the emitting end of the point laser (5) and the spraying point.

4. The apparatus of claim 3, wherein, Angle discs are arranged at the connection between the support frame (2) and the movable support (3), which are used for quickly displaying the angle between the support frame (2) and the movable support (3), so as to obtain the angle between the point laser (5) and the central axis of the multi-chamber explosion spraying gun, and the distance between the emitting end of the point laser (5) and the central axis of the multi-chamber explosion spraying gun is calculated according to the known angle through the tangent function and the inverse tangent function.

5. The apparatus of claim 4, wherein, The device further includes a control system and a display screen, and the distance between the emitting end of the point laser (5) and the central axis of the multi-chamber explosion spraying gun is directly displayed on the display screen by inputting the angle between the support frame (2) and the movable support (3).

6. The apparatus of claim 3, wherein, The projection position of the line laser emitted by the line laser (1) on the central axis of the multi-chamber explosion spraying gun on the surface to be sprayed, the line lasers emitted by the two line lasers (1) at intervals of 180° coincide, and the line lasers emitted by the four line lasers (1) form a cross laser line at the central position of the multi-chamber explosion spraying gun, and the direction of the line laser is the xy-axis moving direction of the multi-chamber explosion spraying gun.

7. A multi-chamber explosion spray laser assisted positioning method based on the apparatus of any one of claims 1-6, characterized in that, The following steps are included: S1, a laser beam is emitted in each direction in front of the multi-chamber explosion spraying gun through the point laser (5) on both sides of the port of the multi-chamber explosion spraying gun, the position of the slider is adjusted, the angle of the two laser beams is synchronously adjusted through the connecting rod (4) and the movable support (3), until the projection position of the two laser beams on the central axis of the multi-chamber explosion spraying gun on the surface to be sprayed coincides, the slider (3) is fixed, the distance between the spraying gun port and the surface to be sprayed is calculated by measuring the included angle between the laser beam and the central axis of the spraying gun and the straight line distance between the emitting end of the laser beam and the central axis of the spraying gun; S2, the concentric circle of the end surface of the multi-chamber explosion spraying gun with the center point of the gun as the center, four linear laser beams are emitted by four linear lasers (1), the laser projection forms a cross intersection intersection on the vertical plane of the gun, and the intersection is the center point of the gun; S3, based on the center point of the gun and the distance between the gun port and the surface to be sprayed, spraying is carried out.

8. The method of claim 7, wherein, The angle between the laser beam and the central axis of the gun is read by the angle disc arranged at the connection between the support frame (2) and the movable support frame (3), and the distance between the gun port and the surface to be sprayed is calculated by the external control system based on the angle.

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