Adjustable multi-angle powder feeding spray gun device for thermal spraying

Abstract

The adjustable multi-angle powder feeding spray gun device for thermal spraying comprises a support, a guide assembly is arranged on the support, the guide assembly comprises a moving table moving in the axial direction of a multi-jaw chuck base, an angle adjusting support is arranged on the moving table, an adjusting assembly is arranged on the angle adjusting support, and the multi-jaw chuck base is arranged on the adjusting assembly. The adjusting assembly comprises a telescopic frame which stretches out and draws back in the radial direction of the multi-jaw chuck base. Through the arrangement of the axial driving assembly and the telescopic cylinder, the position of the spray gun can be adjusted in the axial direction and the radial direction, the spray gun can adapt to workpieces of different sizes and shapes, the speed reduction motor is matched to drive the connecting base to drive the spray gun to rotate, and linkage operation of radial movement and horizontal rotation is achieved; and the circumferential surface, the end face and the complex curved surface of the workpiece can be sprayed in all directions, the device is particularly suitable for batch spraying of the workpieces with the complex curved surfaces, and the adaptability and the production efficiency of the device are improved.

Description

Technical Field

[0001] This application relates to the field of spraying equipment technology, and in particular to an adjustable multi-angle powder feeding spray gun device for thermal spraying. Background Technology

[0002] Thermal spraying technology, as an important surface engineering technology, involves spraying molten or semi-molten materials onto the surface of a workpiece to form a coating with special properties, thereby improving the workpiece's wear resistance, corrosion resistance, and high-temperature resistance.

[0003] However, existing thermal spraying guns have limited angle adjustment range, typically only allowing for simple up-and-down or left-and-right adjustments, making it difficult to achieve omnidirectional, multi-angle spraying operations. For workpieces with complex curved surfaces or irregular shapes, manual operation of the spray gun is still required, necessitating frequent adjustments to the workpiece's posture or the spray gun's position. This results in low operational efficiency and the potential for spraying dead zones, affecting the uniformity and integrity of the coating quality. For example, when spraying workpieces with stepped surfaces, traditional spray guns struggle to effectively spray surfaces at different heights and angles simultaneously, requiring multiple adjustments to the spray gun position and extending the production cycle. Summary of the Invention

[0004] This application provides an adjustable multi-angle powder feeding spray gun device for thermal spraying, to solve the problem that the existing thermal spray guns have a limited angle adjustment range, making it difficult to meet the spraying needs of complex curved workpieces. The technical solution is as follows:

[0005] An adjustable multi-angle powder feeding spray gun device for thermal spraying includes a bracket located on one side of a multi-jaw chuck base on a thermal spraying production line. The bracket is axially arranged along the multi-jaw chuck base. An axial movement adjustment component is provided on the bracket. The axial movement adjustment component includes a movable platform that can move axially along the multi-jaw chuck base and an axial drive component for driving the movable platform. An angle adjustment component is provided on the movable platform. A telescopic frame assembly that can extend and retract radially along the multi-jaw chuck base is provided on the angle adjustment component. A horizontally rotatable connecting seat is provided on the telescopic frame assembly. A spray gun for thermal spraying is mounted on the connecting seat.

[0006] Optionally, the bracket includes two parallel support plates, the ends of which are fixedly connected by a mounting plate, and one of the mounting plates is fixedly connected to the multi-jaw chuck base.

[0007] Optionally, the axial drive assembly includes a lead screw rotatably disposed between two mounting plates, a threaded sleeve fitted on the lead screw, the threaded sleeve being fixedly connected to the moving stage, and one end of the lead screw being connected to the output shaft of a power motor, the power motor being used to drive the moving stage to move axially.

[0008] Optionally, a guide rail is fixedly mounted on the support plate;

[0009] The moving platform includes a connecting plate, and a plurality of sliders adapted to the guide rail are fixedly disposed on the bottom of the connecting plate. The sliders are slidably disposed on the guide rail.

[0010] Optionally, the angle adjustment assembly includes a lower support plate fixedly mounted on the connecting plate, an upper support plate hinged to the lower support plate, an arc-shaped groove on the upper support plate, and a positioning hole adapted to the arc-shaped groove on the lower support plate. Bolts are inserted into the arc-shaped groove and the positioning hole. The angle adjustment assembly is used to adjust and lock the pitch angle of the spray gun.

[0011] Optionally, the telescopic frame assembly includes a telescopic cylinder fixedly mounted on the upper support plate. An L-shaped plate is connected to the end of the telescopic cylinder, and a reduction motor is mounted on the L-shaped plate. The output shaft of the reduction motor is fixedly connected to the connecting seat for driving the spray gun to rotate horizontally.

[0012] Optionally, a bellows cover is provided on the outside of the guide rail to prevent spray powder and impurities from entering the guide rail and lead screw.

[0013] Optionally, a detachable dustproof brush is provided on the contact surface between the slider and the guide rail, and an inclined chip removal groove is provided at the bottom of the guide rail.

[0014] Optionally, a laser rangefinder is also provided next to the connecting seat to monitor the distance between the spray gun and the workpiece surface in real time and provide feedback to control the telescopic cylinder for fine adjustment.

[0015] The beneficial effects of the technical solutions provided in this application include at least the following:

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. This invention, through the setting of the axial drive component and the telescopic cylinder, enables the spray gun to be positioned in both the axial and radial directions, adapting to workpieces of different sizes and shapes. In conjunction with the geared motor driving the connecting seat to rotate the spray gun, it achieves the linkage operation of "radial movement + horizontal rotation", which can spray the circumferential surface, end face and complex curved surface of the workpiece in all directions. It is especially suitable for batch spraying of complex curved surface workpieces, improving the adaptability and production efficiency of the device.

[0018] 2. The present invention uses a mounting plate with mounting holes on both the bottom and side surfaces to adjust the installation position according to the installation conditions, and adjusts the pitch angle of the bracket in conjunction with the angle adjustment to adapt to the needs of different installation scenarios and improve the applicability of the device.

[0019] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a first-view three-dimensional structural diagram of the adjustable multi-angle powder feeding spray gun device for thermal spraying provided in the embodiments of this application;

[0022] Figure 2 This is a second-view perspective three-dimensional structural diagram of the adjustable multi-angle powder feeding spray gun device for thermal spraying provided in the embodiments of this application;

[0023] Figure 3 This is a third-view perspective three-dimensional structural diagram of the adjustable multi-angle powder feeding spray gun device for thermal spraying provided in the embodiments of this application.

[0024] Explanation of reference numerals in the attached figures

[0025] 1-Bracket; 101-Mounting plate; 102-Support plate; 2-Axial drive assembly; 201-Lead screw; 202-Lead sleeve; 3-Axial movement adjustment assembly; 301-Guide rail; 302-Slider; 303-Connecting plate; 4-Angle adjustment assembly; 401-Lower support plate; 402-Upper support plate; 5-Telescopic frame assembly; 501-Telescopic cylinder; 502-Gear motor; 503-Connecting seat; 6-Spray gun; 7-Transmission unit; 8-Arc groove; 9-Positioning hole. Detailed Implementation

[0026] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0027] In this disclosure, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the relative positions of the corresponding components in the direction of gravity when they are in use, and "inner" and "outer" refer to their relative positions to the contours of the corresponding components themselves. Furthermore, the terms "first," "second," etc., used in this disclosure are for distinguishing one element from another and do not have sequential or importance implications. In the following description, when referring to the accompanying drawings, unless otherwise explained, the same reference numerals in different drawings denote the same or similar elements.

[0028] The adjustable multi-angle powder feeding spray gun device for thermal spraying is mainly used in thermal spraying production lines. It aims to solve the problem that traditional spray gun devices have limited adjustment dimensions and are difficult to adapt to the spraying needs of various workpieces. Through the multi-dimensional adjustment structure, it can achieve precise control of the spray gun position and angle, ensuring coating quality and production efficiency.

[0029] According to the embodiments of this application, refer to Figures 1 to 3 The adjustable multi-angle powder feeding spray gun device for thermal spraying includes a bracket 1, an axial movement adjustment component 3, an angle adjustment component 4, a telescopic frame component 5, a connecting seat 503, and a spray gun 6. The components work together to form a complete adjustment and spraying system.

[0030] The bracket 1 is arranged axially along the multi-jaw chuck base. The bracket 1 is provided with an axial movement adjustment component 3. The axial movement adjustment component 3 includes a movable stage that can move axially along the multi-jaw chuck base and an axial drive component 2 for driving the movable stage. An angle adjustment component 4 is provided on the movable stage. An angle adjustment component 4 is provided with a telescopic frame component 5 that can extend and retract radially along the multi-jaw chuck base. A horizontally rotatable connecting seat 503 is provided on the telescopic frame component 5. A spray gun 6 for thermal spraying is installed on the connecting seat 503.

[0031] The bracket 1 serves as the supporting foundation for the entire device, positioned axially along one side of the multi-jaw chuck base. It provides a stable mounting platform for all subsequent adjustment components and the spray gun 6, ensuring that no components will shift or vibrate due to instability during adjustment and spraying. When the position of the spray gun 6 along the workpiece axis needs adjustment, the axial movement adjustment component 3 begins operation. The moving table is the core component supporting the subsequent angle adjustment component 4, the telescopic frame component 5, and the spray gun 6. The axial drive component 2 provides power for the movement of the moving table. After activating the axial drive component 2, its power output drives the moving table to move smoothly along the axis of the bracket 1. The operator can control the moving table to the target position according to the axial length of the workpiece and the spraying requirements. After the axial position adjustment is completed, the pitch angle of the spray gun 6 needs to be adjusted using the angle adjustment component 4. Once the appropriate angle is reached, it is fixed by a locking structure to prevent angle deviation due to vibration or reaction force during spraying, ensuring that the pitch angle remains stable throughout the spraying process. Subsequently, the radial distance between the spray gun 6 and the workpiece surface is adjusted using the telescopic frame component 5. The telescopic frame assembly 5 can extend and retract radially along the multi-jaw chuck base. The telescopic end of the telescopic frame assembly 5 is connected to the connecting seat 503, and the spray gun 6 is mounted on the connecting seat 503. Therefore, the extension and retraction of the telescopic frame assembly 5 directly moves the spray gun 6 closer to or further away from the workpiece. In the thermal spraying process, the distance between the spray gun 6 and the workpiece significantly affects the coating thickness, density, and adhesion. Operators control the extension and retraction of the telescopic frame to the target distance based on the characteristics of the spraying material and the workpiece size, ensuring that the spray gun 6 maintains the optimal spraying distance between itself and the workpiece surface. The telescopic frame assembly 5 adopts a high-precision telescopic structure, enabling distance adjustment with millimeter-level or even higher precision, meeting the stringent distance accuracy requirements of different spraying processes.

[0032] Finally, the horizontal rotation function of the connecting seat 503 is used to adjust the horizontal angle of the spray gun 6. The connecting seat 503 can rotate horizontally around its own axis, and its rotation causes the spray gun 6 to adjust its direction on the horizontal plane. For example, when the workpiece needs to be sprayed more intensely in a specific circumferential position, or when there are blind spots in the circumferential spraying, the spray gun 6 can be adjusted to a suitable horizontal angle by rotating the connecting seat 503 to ensure that the spraying trajectory can cover all areas of the workpiece to be sprayed. After being rotated into place, it is fixed by the locking mechanism of the connecting seat 503 to prevent it from rotating on its own during the spraying process.

[0033] Throughout the spraying process, all adjustment components work together to form a comprehensive adjustment system encompassing four dimensions: axial, pitch, radial, and horizontal rotation. For example, when spraying stepped shaft-like workpieces, the multi-jaw chuck drives the workpiece to rotate at a constant speed, while the axial movement adjustment component 3 drives the moving table to move slowly along the axial direction, achieving full axial length coverage of the workpiece. When spraying steps of different diameters, the telescopic frame component 5 makes fine adjustments to ensure that the distance between the spray gun 6 and the surface of each step is consistent. If there is a slope transition at the step, the angle adjustment component 4 adjusts the angle in advance to ensure that the spraying direction conforms to the slope. At the same time, the horizontal rotation function of the connecting seat 503 can cooperate with the workpiece rotation to optimize the spraying trajectory and avoid uneven coating thickness.

[0034] According to the embodiments of this application, refer to Figure 1 and Figure 2 As shown, the bracket 1 includes two parallel support plates 102 and two mounting plates 101 for connecting the ends of the two support plates 102, forming a frame structure. The support plates 102, as the main load-bearing components of the bracket 1, are made of high-strength steel through heat treatment, possessing excellent rigidity and wear resistance. They can withstand the weight of the axial movement adjustment assembly 3, angle adjustment assembly 4, telescopic frame assembly 5, and spray gun 6 for extended periods, while resisting vibrations and impacts generated during spraying, preventing deformation after long-term use, and ensuring the movement and rotation accuracy of the subsequent adjustment components. The parallelism of the two support plates 102 requires extremely high precision. During processing, precision milling and grinding processes are used to ensure parallelism. This precision design ensures that the moving table of the subsequent axial movement adjustment assembly 3 will not deviate due to insufficient parallelism of the support plates 102 when moving along them, ensuring that the axial movement trajectory of the spray gun 6 is completely consistent with the workpiece axis, and avoiding axial coating deviation during spraying.

[0035] Two mounting plates 101 are respectively connected to the two ends of two support plates 102, forming a frame structure. The mounting plates 101 are also made of high-strength steel, and the connection to the support plates 102 uses a combination of welding and bolt reinforcement: first, the mounting plates 101 are fixed to the ends of the support plates 102 by welding; after welding, aging treatment is required to eliminate internal stress and prevent welding deformation from affecting the overall accuracy of the bracket 1; then, high-strength bolts are added around the welded area to further improve the connection strength and prevent cracking of the weld points due to vibration during long-term use. This dual connection method ensures the structural stability of the bracket 1 and facilitates disassembly and adjustment during subsequent maintenance. The connection between the bracket 1 and the multi-jaw chuck base is achieved through one of the mounting plates 101.

[0036] In actual thermal spraying production, when the moving platform of the axial movement adjustment component 3 moves along the support plate 102, the two parallel support plates 102 provide symmetrical and stable support for the moving platform, distributing the weight of the moving platform and its components, and preventing deformation or vibration caused by excessive force on a single support point. For example, when bearing a large number of adjustment components, the parallel structure of the support plate 102 ensures that the moving platform moves smoothly throughout its entire stroke range without jamming or tilting, ensuring the axial positioning accuracy of the spray gun 6. At the same time, the end-closed structure of the mounting plate 101 not only improves the overall rigidity of the bracket 1, but also acts as a stroke limiter. When the moving platform moves to the end of the bracket 1, the mounting plate 101 can prevent the moving platform from continuing to move, preventing the moving platform from exceeding its stroke and causing damage to the components, thus providing a safety protection function.

[0037] According to the embodiments of this application, refer to Figure 1 and Figure 2 As shown, the axial drive assembly 2 includes a lead screw 201 rotatably disposed between two mounting plates 101, a threaded sleeve 202 sleeved on the lead screw 201, the threaded sleeve 202 being fixedly connected to the moving platform, and one end of the lead screw 201 being connected to the output shaft of a power motor, the power motor being used to drive the moving platform to move axially.

[0038] The axial drive assembly 2 of the adjustable multi-angle powder feeding spray gun device for thermal spraying is the core power mechanism that enables the spray gun 6 to move precisely along the axial direction of the multi-jaw chuck base. It converts the rotational motion of the power motor into the linear motion of the moving table through the lead screw 201 transmission method. It has the characteristics of high positioning accuracy, smooth transmission and flexible control, and provides reliable power support for the axial position adjustment of the spray gun 6, ensuring that the spray gun 6 can accurately cover the axial area to be sprayed on the workpiece during the thermal spraying process.

[0039] The two ends of the lead screw 201 are mounted on two mounting plates 101 of the bracket 1 via high-precision bearings. Bearing seats are also provided between the bearings and the mounting plates 101, and the bearing seats are fixed to the mounting plates 101 by bolts. A threaded sleeve 202 is fitted onto the lead screw 201, and the outer side of the threaded sleeve 202 is fixedly connected to the moving table by bolts. The power motor serves as the power source for the axial drive assembly 2, and is either a servo motor or a stepper motor, selected based on the required spraying precision. The power motor is connected to one end of the lead screw 201 via a coupling. A flexible coupling is used, which has a certain ability to compensate for deviations, offsetting minor coaxiality errors between the motor output shaft and the lead screw 201 axis, avoiding additional torque caused by axis deviation, protecting the motor and the lead screw 201, and ensuring smooth power transmission. The motor mounting base is fixed on the mounting plate 101 of the bracket 1. The position of the mounting base is fine-tunable, facilitating adjustment of the coaxiality between the motor axis and the lead screw 201 axis during installation, further improving transmission stability.

[0040] In actual thermal spraying operations, the axial drive assembly 2 works in close coordination with the spraying requirements. When it is necessary to adjust the spray gun 6 to a specific axial position on the workpiece, the operator sends a command to the power motor through the control system. The power motor starts according to the command and drives the lead screw 201 to rotate around its own axis. Since the lead sleeve 202 is fixedly connected to the moving table, and the moving table restricts the degree of rotational freedom, it can only move along the axial direction. Therefore, the rotation of the lead screw 201 will drive the lead sleeve 202 to move linearly along the axis of the lead screw 201, thereby driving the moving table and its angle adjustment assembly 4, telescopic frame assembly 5, and spray gun 6 to move synchronously along the axial direction.

[0041] According to the embodiments of this application, refer to Figure 1 and Figure 2 As shown, a guide rail 301 is fixedly mounted on the support plate 102; the moving table includes a connecting plate 303, and several sliders 302 adapted to the guide rail 301 are fixedly mounted on the bottom of the connecting plate 303. The sliders 302 are slidably mounted on the guide rail 301. The guide rail 301 and slider 302 cooperation structure in this adjustable multi-angle powder feeding spray gun device for thermal spraying is the core guiding mechanism in the axial movement adjustment component 3 to achieve stable and precise guidance of the moving table. Through the rolling cooperation of the linear guide rail 301 and the slider 302, it provides precise guidance for the axial movement of the moving table, and at the same time bears the weight of the moving table and its components and the reaction force during the spraying process, ensuring that the moving table has no deviation or jamming throughout the entire stroke range, providing a basic guarantee for the axial positioning accuracy of the spray gun 6.

[0042] refer to Figure 1 The guide rail 301 serves as a guiding reference component and is fixedly mounted on the support plate 102 of the bracket 1. The connecting plate 303 serves as the base platform for bearing the angle adjustment assembly 4, the telescopic frame assembly 5, and the spray gun 6. Several sliders 302 are fixedly mounted on the bottom of the connecting plate 303 by bolts. The number of sliders 302 is determined according to the length of the connecting plate 303 and the load-bearing weight, and is usually 2-4, and is evenly distributed along the length of the connecting plate 303.

[0043] In actual thermal spraying operations, the guiding function of the guide rail 301 and the slider 302 is maintained throughout the entire axial movement process. When the power motor of the axial drive assembly 2 drives the lead screw 201 to rotate, and the lead sleeve 202 drives the moving table to move, the slider 302 at the bottom of the connecting plate 303 will slide along the guide rail 301 on the support plate 102. Due to the high straightness accuracy of the guide rail 301 and the small clearance between the slider 302 and the guide rail 301, the slider 302 will not shift laterally or rotate during the sliding process, ensuring that the connecting plate 303 always moves smoothly along the extension direction of the guide rail 301. This, in turn, drives the angle adjustment assembly 4, the telescopic frame assembly 5, and the spray gun 6 installed on the connecting plate 303 to move synchronously and smoothly, ensuring that the axial movement trajectory of the spray gun 6 is completely consistent with the axial direction of the workpiece, and avoiding the problem of axial displacement or uneven thickness of the sprayed coating due to guiding deviation. According to the embodiments of this application, refer to Figure 3 As shown, the angle adjustment assembly 4 includes a lower support plate 401 fixedly mounted on the connecting plate 303, an upper support plate 402 hinged to the lower support plate 401, an arc-shaped groove 8 on the upper support plate 402, and a positioning hole 9 on the lower support plate 401 that matches the arc-shaped groove 8. Bolts are inserted into the arc-shaped groove 8 and the positioning hole 9. The angle adjustment assembly 4 is used to adjust and lock the pitch angle of the spray gun 6.

[0044] The angle adjustment component 4 of this adjustable multi-angle powder feeding spray gun device for thermal spraying provides the spray gun 6 with a wide range and high precision pitch angle adjustment capability through a hinge structure and arc groove 8 positioning method. It adapts to the spraying requirements of different surface tilt angles of the workpiece, ensures that the spraying direction of the spray gun 6 maintains the optimal angle with the workpiece surface, and improves the coating adhesion and uniformity.

[0045] An arc-shaped groove 8 is formed on the upper support plate 402. The trajectory of the arc-shaped groove 8 is centered on the hinge point, and the radius of the arc is determined according to the required pitch angle adjustment range, which is usually from -30° to +30°. Therefore, the curvature of the arc-shaped groove 8 must cover this angle range to ensure that the upper support plate 402 can rotate freely within this range. The width of the arc-shaped groove 8 is slightly larger than the diameter of the locking bolt, which ensures that the bolt can slide smoothly in the groove and avoids excessive gaps that may cause offset during angle adjustment. The edges of the arc-shaped groove 8 are chamfered to prevent sharp edges from scratching operators or hindering bolt movement during sliding.

[0046] The lower support plate 401 has positioning holes 9 that are adapted to the arc-shaped groove 8. The diameter of the positioning holes 9 matches the diameter of the locking bolts, ensuring that the bolts can be tightly inserted into the holes and providing reliable locking force. The number of positioning holes 9 can be set according to actual needs.

[0047] According to the embodiments of this application, refer to Figure 3As shown, the telescopic frame assembly 5 includes a telescopic cylinder 501 fixedly installed on the upper support plate 402. An L-shaped plate is connected to the end of the telescopic cylinder 501. A reduction motor 502 is installed on the L-shaped plate. The output shaft of the reduction motor 502 is fixedly connected to the connecting seat 503 and is used to drive the spray gun 6 to rotate horizontally.

[0048] The telescopic frame assembly 5 of this adjustable multi-angle powder feeding spray gun device for thermal spraying is the core mechanism for achieving precise radial extension and horizontal rotation adjustment of the spray gun 6 along the multi-jaw chuck base. Through the linear extension of the telescopic cylinder 501 and the rotational drive of the reduction motor 502, combined with the structural connection of the L-shaped plate, it simultaneously meets the dual requirements of radial distance fine adjustment and horizontal angle adjustment of the spray gun 6, further enhancing the device's adaptability to complex workpiece spraying scenarios, ensuring that the spraying trajectory can accurately cover the workpiece surface, and optimizing coating quality.

[0049] The telescopic cylinder 501 is selected from either a high-precision electric telescopic cylinder 501 or a pneumatic telescopic cylinder 501, depending on the requirements of the spraying process for adjustment accuracy and response speed. The end of the telescopic cylinder 501 is tightly connected to the L-shaped plate by bolts. The L-shaped plate is made of steel plate through bending and precision machining, and its two vertical surfaces are respectively attached to the end of the telescopic cylinder 501 and the mounting base of the geared motor 502.

[0050] The geared motor 502 is fixedly mounted on one side of the L-shaped plate with bolts. The output shaft of the geared motor 502 is fixedly connected to the connecting seat 503 through a coupling, so as to realize the precise and stable adjustment of the horizontal angle of the spray gun 6.

[0051] When it is necessary to adjust the radial distance between the spray gun 6 and the workpiece surface, the control system sends a command to the telescopic cylinder 501. The piston rod of the telescopic cylinder 501 extends or retracts, driving the L-shaped plate, the reduction motor 502, the connecting seat 503 and the spray gun 6 to move radially synchronously until the spray gun 6 and the workpiece surface reach the preset optimal spraying distance.

[0052] When the horizontal angle of the spray gun 6 needs to be adjusted, the control system sends a rotation command to the geared motor 502. The output shaft of the geared motor 502 drives the connecting seat 503 to rotate horizontally synchronously with the spray gun 6. For example, if there are circumferentially distributed grooves on the workpiece surface, if the spray gun 6 is kept at a fixed horizontal angle, spray dead corners can easily form inside the grooves. In this case, by driving the spray gun 6 to rotate through the geared motor 502, the nozzle direction is aligned with the inside of the groove, which can effectively eliminate dead corners and ensure that a uniform coating can also be formed on the inner surface of the groove. If the workpiece needs to be coated with a thicker layer at a specific circumferential location, the geared motor 502 can be controlled to rotate the spray gun 6 to the corresponding angle and then stop. This, combined with the rotation of the workpiece, achieves precise local thickening, meeting the special requirements of the coating thickness for the sealing surface. The braking function of the geared motor 502 can immediately lock the output shaft after rotation to the correct position, preventing the spray gun 6 from rotating on its own due to vibration or reaction force, ensuring a stable horizontal angle.

[0053] The telescopic frame assembly 5, through the coordinated operation of the telescopic cylinder 501, L-shaped plate, reduction motor 502 and connecting seat 503, simultaneously achieves precise radial distance adjustment and flexible horizontal angle adjustment of the spray gun 6. Its structural design takes into account adjustment accuracy, power performance, stability and maintenance convenience, further expanding the device's adaptability to complex workpieces and providing key technical support for high-quality thermal spraying operations.

[0054] According to an embodiment of this application, a bellows cover can also be fitted over the outside of the guide rail 301 to prevent spray powder and impurities from entering the guide rail 301 and the lead screw 201. By setting a flexible and telescopic bellows cover, the guide rail 301 and the lead screw 201 can be fully covered and protected throughout their travel, effectively blocking powder, splatter, and environmental impurities generated during thermal spraying from entering the transmission parts, avoiding accelerated wear of components, decreased transmission accuracy, or machine downtime due to malfunction, significantly extending the service life of the guide rail 301 and the lead screw 201, and ensuring long-term stable operation of the device. The bellows cover is installed using a two-end fixed structure: one end is fixedly connected to the mounting plate 101 of the bracket 1 by bolts, and the other end is fixedly connected to the side of the connecting plate 303 of the moving platform.

[0055] According to an embodiment of this application, a detachable dustproof brush is provided on the contact surface between the slider 302 and the guide rail 301, and an inclined chip removal groove is provided at the bottom of the guide rail 301 for further dust prevention and chip removal.

[0056] The detachable dustproof brush and chip removal groove complement and strengthen the bellows cover protective structure, forming a dual dustproof and chip removal system of "active cleaning + passive chip removal". This further improves the cleanliness of the guide rail 301, avoids component wear caused by residual fine powder or debris, ensures long-term precise cooperation between the guide rail 301 and the slider 302, and guarantees the axial movement stability of the moving table.

[0057] The dustproof brush on the contact surface between the slider 302 and the guide rail 301 is made of nylon filaments. The length of the brush bristles is determined according to the fit clearance between the slider 302 and the guide rail 301, ensuring that the bristles can fit tightly against the surface of the guide rail 301, while not causing excessive resistance when the slider 302 moves due to excessively long bristles.

[0058] The inclined chip removal groove at the bottom of guide rail 301 is a key structure for achieving "passive chip removal" in conjunction with the dustproof brush. The chip removal groove runs through the entire bottom of guide rail 301 along its length, with a V-shaped or U-shaped cross-section. The inclined direction is towards the side away from the multi-jaw chuck base or the chip removal channel of the workshop, ensuring that impurities in the groove can automatically slide off and be discharged under gravity.

[0059] According to an embodiment of this application, a laser rangefinder sensor is also provided next to the connecting seat 503 to monitor the distance between the spray gun 6 and the workpiece surface in real time, and to provide feedback to control the telescopic cylinder 501 for fine-tuning. The laser rangefinder sensor is an intelligent core component for realizing real-time monitoring and feedback control of the distance between the spray gun 6 and the workpiece surface. It acquires the distance data between the spray gun 6 and the workpiece surface in real time through high-precision laser rangefinder technology, and transmits the data to the control system. The control system drives the telescopic cylinder 501 to perform dynamic fine-tuning, ensuring that the spray gun 6 and the workpiece surface always maintain the optimal spraying distance during the spraying process. This effectively solves the problem of distance deviation caused by workpiece clamping errors, surface morphology changes, or vibration, and significantly improves the consistency and stability of coating quality.

[0060] The laser rangefinder can be either a triangular reflective or time-of-flight laser sensor, depending on the distance range and accuracy requirements of the spraying scenario.

[0061] The laser rangefinder is fixedly installed next to the connector 503. The installation position has been precisely calibrated, and the laser emission direction is parallel to the nozzle axis of the spray gun 6.

[0062] Working Principle: The bracket 1 is fixed to one side of the multi-jaw chuck base of the thermal spraying production line through the mounting holes of the mounting plate 101, ensuring axial alignment between the device and the workpiece. The power motor drives the lead screw 201 to rotate via the transmission unit 7, causing the lead sleeve 202 and the moving table to move axially along the guide rail 301, aligning the spray gun 6 with the starting position of the axial spraying on the workpiece. The telescopic cylinder 501 drives the L-shaped plate to extend and retract radially, adjusting the distance between the spray gun 6 and the workpiece surface. Loosening the bolts of the angle adjustment component 4 and rotating the upper support plate 402 adjusts the pitch angle of the spray gun 6, aligning it with the normal direction of the workpiece surface and locking it to adapt to the surface tilt angle. Based on the diameter and length of the cylindrical workpiece, the rotation speed and stroke of the lead screw 201 are set to determine the moving speed and range of the spray gun 6 in the axial direction of the workpiece. The rotation speed and angle range of the reduction motor 502 are set to enable the spray gun 6 to rotate at a uniform speed, achieving uniform spraying on the circumferential surface of the workpiece. During the spraying process, the axial movement speed and dwell time of the spray gun 6 can be adjusted according to the size and shape of the end face to ensure uniform coating on the end face.

[0063] When spraying a stepped curved surface, the lead screw 201 drives the spray gun 6 to move axially. When encountering a region with a sudden change in diameter, the telescopic cylinder 501 adjusts the radial position synchronously. For the arc transition surface, the reduction motor 502 drives the spray gun 6 to rotate horizontally, so that the spray gun 6 always maintains a constant distance from each step surface.

[0064] A laser rangefinder continuously monitors the distance between the spray gun 6 and the workpiece surface. When a local protrusion or depression on the curved surface causes the distance deviation to exceed a threshold, the telescopic cylinder 501 is automatically triggered to perform a micro-action, correcting the radial position and ensuring that the spraying trajectory accurately conforms to the curved surface contour, avoiding dead angles or over-spraying. When moving to the end of the workpiece, the geared motor 502 drives the spray gun 6 to rotate 90°, at which point the spray gun 6 is perpendicular to the end of the workpiece, enabling spraying of the end plane without the need for manual adjustment of the workpiece posture, greatly improving spraying efficiency and automation.

[0065] After the coating of one workpiece is completed, the lead screw 201 drives the spray gun 6 back to the initial position, and the reduction motor 502 stops rotating. The coated workpiece is then removed.

[0066] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0067] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0068] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. An adjustable multi-angle powder feeding spray gun device for thermal spraying, characterized in that: The system includes a bracket (1) located on one side of the multi-jaw chuck base on the thermal spraying production line. The bracket (1) is axially arranged along the multi-jaw chuck base. An axial movement adjustment assembly (3) is provided on the bracket (1). The axial movement adjustment assembly (3) includes a movable platform that can move along the axial direction of the multi-jaw chuck base and an axial drive assembly (2) for driving the movable platform. An angle adjustment assembly (4) is provided on the movable platform. A telescopic frame assembly (5) that can extend and retract radially along the multi-jaw chuck base is provided on the angle adjustment assembly (4). A horizontally rotatable connecting seat (503) is provided on the telescopic frame assembly (5). A spray gun (6) for thermal spraying is installed on the connecting seat (503).

2. The adjustable multi-angle powder feeding spray gun device for thermal spraying according to claim 1, characterized in that: The bracket (1) includes two parallel support plates (102), the ends of which are fixedly connected by a mounting plate (101), and one of the mounting plates (101) is fixedly connected to the multi-jaw chuck base.

3. The adjustable multi-angle powder feeding spray gun device for thermal spraying according to claim 2, characterized in that: The axial drive assembly (2) includes a lead screw (201) rotatably disposed between two mounting plates (101), a sleeve (202) is fitted on the lead screw (201), the sleeve (202) is fixedly connected to the moving platform, and one end of the lead screw (201) is connected to the output shaft of a power motor, the power motor being used to drive the moving platform to move axially.

4. The adjustable multi-angle powder feeding spray gun device for thermal spraying according to claim 3, characterized in that: A guide rail (301) is fixedly installed on the support plate (102); The moving platform includes a connecting plate (303), and a plurality of sliders (302) adapted to the guide rail (301) are fixedly provided on the bottom of the connecting plate (303). The sliders (302) are slidably disposed on the guide rail (301).

5. The adjustable multi-angle powder feeding spray gun device for thermal spraying according to claim 4, characterized in that: The angle adjustment assembly (4) includes a lower support plate (401) fixedly mounted on a connecting plate (303), an upper support plate (402) hinged to the lower support plate (401), an arc groove (8) on the upper support plate (402), and a positioning hole (9) on the lower support plate (401) that matches the arc groove (8). Bolts are inserted into the arc groove (8) and the positioning hole (9). The angle adjustment assembly (4) is used to adjust and lock the pitch angle of the spray gun (6).

6. The adjustable multi-angle powder feeding spray gun device for thermal spraying according to claim 5, characterized in that: The telescopic frame assembly (5) includes a telescopic cylinder (501) fixedly installed on the upper support plate (402). The end of the telescopic cylinder (501) is connected to an L-shaped plate. A reduction motor (502) is installed on the L-shaped plate. The output shaft of the reduction motor (502) is fixedly connected to the connecting seat (503) to drive the spray gun (6) to rotate horizontally.

7. The adjustable multi-angle powder feeding spray gun device for thermal spraying according to claim 4, characterized in that: The guide rail (301) is fitted with a bellows cover to prevent spray powder and impurities from entering the guide rail (301) and lead screw (201).

8. The adjustable multi-angle powder feeding spray gun device for thermal spraying according to claim 7, characterized in that: A detachable dustproof brush is provided on the contact surface between the slider (302) and the guide rail (301), and an inclined chip removal groove is provided at the bottom of the guide rail (301).

9. The adjustable multi-angle powder feeding spray gun device for thermal spraying according to claim 1, characterized in that: A laser rangefinder is also provided next to the connecting seat (503) to monitor the distance between the spray gun (6) and the workpiece surface in real time and to provide feedback to control the telescopic cylinder (501) for fine adjustment.

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