PVC pipeline surface laser coding device

Abstract

The utility model discloses a PVC pipeline surface laser coding device, and relates to the technical field of pipe machining equipment. The device comprises a workbench, a marking mechanism and a pipeline bearing mechanism, and the marking mechanism is arranged above the workbench and comprises a laser head capable of vertically ascending and descending and axially moving, a laser head integrated closed-loop cooling system and an inclined airflow nozzle; the pipeline bearing mechanism is provided with a V-shaped driving wheel set, an adjustable supporting assembly and a controller, the V-shaped driving wheel set drives the pipeline to rotate through a gear set, the wheel face of the V-shaped driving wheel set is covered with a silica gel anti-skid layer with rhombic textures, the adjustable supporting assembly clamps the pipeline through a hinge arm and a polyurethane buffer wheel, and the supporting opening and closing angle is dynamically adjusted through a servo motor. According to the utility model, through cooperative control of non-contact laser marking and flexible transmission, the problems of physical damage, transmission slip and heat influence of the traditional marking technology on the pipeline are solved, and the device has the advantages of high precision, low wear and adaptation to pipelines of multiple specifications.

Description

A laser marking device for PVC pipe surface Technical Field

[0001] This utility model relates to the field of laser marking technology, and in particular to a laser marking device for the surface of PVC pipes. Background Technology

[0002] PVC pipes, as a core material in construction and municipal engineering, require durable and clear markings to record production information. Traditional marking technologies have the following limitations: 1. Contact marking damage: Mechanical rolling or inkjet methods can easily cause physical damage or contamination to the pipe surface, and the markings are prone to wear and detachment; 2. Insufficient dynamic marking stability: The transmission mechanism is prone to slippage during pipe rotation, causing circumferential marking offset or misalignment; 3. Heat-affected zone control defects: Localized high temperatures during laser processing can easily cause material deformation or surface defects; 4. Poor equipment adaptability: Traditional equipment is difficult to be compatible with pipes of different diameters or curvatures, requiring frequent tooling adjustments and affecting production efficiency.

[0003] This patent addresses the aforementioned problems by proposing a highly efficient and low-damage laser marking technology solution. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a laser marking device for the surface of PVC pipes.

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

[0006] This utility model discloses a laser marking device for the surface of PVC pipes, including a worktable. A marking mechanism is provided above the worktable, comprising a laser head, a lifting module for driving the laser head to move vertically, and a horizontal moving device for driving the laser head to move along the pipe axis. A pipe supporting mechanism is provided on one side of the worktable, including: a pipe fixing platform for placing the pipe to be processed; a parallel guide rail extending along the pipe axis and disposed at the bottom of the pipe fixing platform; and a rotary drive assembly including two pairs of V-shaped drive wheel sets symmetrically distributed on both sides of the pipe axis. Each pair of drive wheel sets is linked to a drive motor via a gear set. The wheel assembly has a silicone elastic anti-slip layer on its surface, and the anti-slip layer has a diamond-shaped raised texture. The adjustable support assembly includes a cross-hinged support arm, a polyurethane buffer support wheel set on the top of the support arm, and a support servo motor that drives the support arm to open and close via a ball screw. The laser head integrates a closed-loop cooling system and an adjustable-angle compressed air nozzle, and the airflow direction of the compressed air nozzle is at an acute angle to the marking direction. The controller is electrically connected to the drive motor, the support servo motor, the lifting module, and the horizontal movement device, and receives the laser head position signal and dynamically adjusts the matching relationship between the pipeline speed and the laser movement path.

[0007] As a preferred technical solution of this utility model, the height of the rhomboid raised texture of the elastic anti-slip layer is 0.5-1mm, the Shore hardness of the silicone layer is 60±5A, and the rhomboid texture is distributed in an alternating pattern on the wheel surface.

[0008] As a preferred technical solution of this utility model, an angle sensor is provided at the hinge of the support arm. The angle sensor and the support servo motor form a closed-loop control system to adjust the clamping pressure of the support wheel on the pipe in real time.

[0009] As a preferred technical solution of this utility model, the tilt angle and airflow pressure of the compressed air nozzle are adjustable, and the airflow direction forms an acute angle with the marking direction.

[0010] As a preferred technical solution of this utility model, the marking mechanism further includes a CCD camera, which detects the marking position on the pipe surface based on an image recognition algorithm and feeds back a position deviation correction signal to the controller.

[0011] As a preferred embodiment of this utility model, the polyurethane buffer support wheel has a diameter of 50-150mm and an annular groove with a depth of 1-2mm on its surface to increase the contact stability with the pipe surface.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. Non-destructive high-precision marking: Using non-contact laser technology: Through composite cooling and airflow guidance design, the thermal impact is significantly reduced, ensuring clear marking without carbonization; real-time matching of pipeline movement and laser path achieves high-precision consistency of curved surface marking;

[0014] 2. Reliable transmission and adaptive support: The use of flexible friction wheel sets with special texture greatly improves transmission stability and avoids slippage; the clamping force of the support wheel is controlled by closed-loop feedback to adapt to different pipe diameters and suppress radial runout.

[0015] 3. High-efficiency production and versatility: Quickly switch tooling configurations, significantly shorten changeover time, and support continuous processing of multi-specification pipes; real-time correction of position deviations based on visual inspection, improving the reliability of marking under complex working conditions. Attached Figure Description

[0016] 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:

[0017] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 is a front view of this utility model;

[0019] Figure 3 is a side view of this utility model;

[0020] Figure 4 is a top view of this utility model;

[0021] Figure 5 is a structural schematic diagram of the adjustable support component in this utility model;

[0022] In the diagram: 1. Workbench; 2. Marking mechanism; 3. Pipeline support mechanism; 4. Controller; 21. Laser head; 22. Lifting module; 23. Horizontal moving device; 24. Closed-loop cooling system; 25. CCD camera; 31. Pipeline fixing platform; 32. Parallel guide rail; 33. Rotary drive assembly; 34. Adjustable support assembly; 241. Compressed air nozzle; 331. Drive wheel set; 332. Gear set; 333. Drive motor; 341. Support arm; 342. Support wheel; 343. Ball screw; 344. Support servo motor; 345. Sensor; 346. Annular groove. Detailed Implementation

[0023] 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.

[0024] In the attached diagram, all identical reference numerals refer to the same components.

[0025] As shown in Figures 1-5, this utility model provides a laser marking device for the surface of PVC pipes, the core components of which and the implementation method are as follows:

[0026] Workbench 1 is a rectangular steel frame platform with an anti-static coating on the surface; it is used to support the marking mechanism 2.

[0027] The marking mechanism 2 includes: a laser head 21 integrating a fiber laser generator and a focusing lens group, and an adjustable-angle compressed air nozzle 241 installed at the output end; it is fixed to the moving end of the lifting module 22 by bolts; it emits a laser beam and forms a mark on the surface of the pipe, and the compressed air nozzle 241 blows away the dust in the processing area.

[0028] The lifting module 22 adopts a ball screw vertical guide rail mechanism and is driven by a servo motor; its base is fixed to the worktable 1, and its top is connected to the laser head 21 to control the vertical lifting of the laser head 21 and adjust the focal length.

[0029] The horizontal moving device 23 consists of a linear slide rail and a synchronous belt drive; its guide rail is installed on the worktable 1, and the synchronous belt is connected to the base of the lifting module 22; it is used to drive the laser head 21 to move along the pipeline axis to achieve long-distance continuous marking.

[0030] The pipeline support mechanism 3 includes: a pipeline fixing platform 31 with a V-shaped groove on the surface of an aluminum alloy platform; it is fixed to a parallel guide rail 32 by bolts; it is used to position the pipeline to be processed and limit radial displacement.

[0031] Parallel guide rail 32 is a double-row linear guide rail that extends along the axial direction of the pipeline; it guides the pipeline to move axially along the pipeline fixing platform 31 to accommodate pipelines of different lengths.

[0032] Rotary drive assembly 33: includes two pairs of symmetrically distributed V-shaped drive wheel sets 331. The wheel surface of the drive wheel set 331 is covered with a silicone elastic anti-slip layer and the surface is processed with a diamond-shaped raised texture. It is installed on both sides of the pipe axially through bearing seats. The gear set 332 is connected to the output shaft of the drive motor 333. It clamps the pipe and transmits rotational torque. The diamond texture enhances the friction.

[0033] As shown in Figure 4, the drive motor 333 is connected to the gear set 332 via a coupling; it is used to drive the V-shaped drive wheel set 331 to rotate synchronously and control the speed of the pipeline.

[0034] As shown in Figure 5, the adjustable support assembly 34 includes: the two arms of the support arm 341 are cross-hinged, and a polyurethane buffer support wheel 342 is installed on the top; and the hinge point is connected to the support servo motor 344 through a ball screw 343; the buffer wheel 342 reduces rigid contact by clamping the pipe through opening and closing action.

[0035] The output shaft of the servo motor 344 drives the ball screw 343 through a coupling; it is used to adjust the opening angle of the support arm 341 to adapt to different pipe diameters.

[0036] The circulating water cooling module of the closed-loop cooling system 24 is integrated into the housing of the laser head 21; its cooling pipes connect the laser generator to the external water tank; it is used to maintain the constant temperature of the laser head 21 and prevent overheating.

[0037] The controller 4 uses an industrial PLC and touch screen integrated control cabinet; it is connected to the drive motor 333, the support servo motor 344, the lifting module 22 and the horizontal moving device 23 via cables; it is used to receive the position signal of the laser head 21, dynamically coordinate the rotation of the pipeline and the movement of the laser, and realize synchronous marking.

[0038] The method of using this utility model is as follows:

[0039] 1. Pipe positioning: Place the pipe in the V-shaped groove of the pipe fixing platform 31, and drive the support arm 341 to close and clamp the pipe by the support servo motor 344.

[0040] 2. Parameter setting: Input the pipe diameter and marking content through controller 4, and the system will automatically calculate the rotation speed and laser path;

[0041] 3. Synchronous marking: The drive motor 333 drives the V-shaped drive wheel group 331 to rotate the pipeline, the laser head 21 moves along the axis of the horizontal moving device 23, and the lifting module 22 dynamically adjusts the focal length at the same time.

[0042] 4. Real-time correction: Compressed air nozzle 241 blows away smoke and dust, closed-loop cooling system 24 maintains temperature, and controller 4 corrects position deviation based on feedback signal.

[0043] In this embodiment, the marking mechanism 2 and the pipe support mechanism 3 are installed independently, which facilitates maintenance and upgrades; the V-shaped drive wheel set 331 and the support arm 341 work together to take into account both rotation drive and flexible support; the controller 4 realizes dynamic matching between the laser and the pipe through a multi-axis linkage algorithm to ensure marking accuracy.

[0044] This utility model is a laser marking device for the surface of PVC pipes. Through innovative transmission structure, dynamic control strategy and modular design, it overcomes the industry problem of balancing accuracy, damage and efficiency in dynamic marking of curved surfaces.

[0045] 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 PVC pipe surface laser marking device comprising a workbench (1), characterized in that: A marking mechanism (2) is provided above the workbench (1), including a laser head (21), a lifting module (22) that drives the laser head (21) to move vertically, and a horizontal moving device (23) that drives the laser head (21) to move along the pipe axis; a pipe carrying mechanism (3) is provided on one side of the workbench (1), including: a pipe fixing platform (31) for placing the pipe to be processed; a parallel guide rail (32) extending along the pipe axis and located at the bottom of the pipe fixing platform (31); a rotary drive assembly (33) including two pairs of V-shaped drive wheel sets (331) symmetrically distributed on both sides of the pipe axis, each pair of drive wheel sets (331) being linked with a drive motor (333) through a gear set (332), and the wheel surface of the V-shaped drive wheel set (331) being covered with an elastic protective silicone material. The anti-slip layer has a diamond-shaped raised texture on its surface; the adjustable support assembly (34) includes a cross-hinged support arm (341), a polyurethane buffer support wheel (342) set on the top of the support arm (341), and a support servo motor (344) that drives the support arm (341) to open and close via a ball screw (343); the laser head (21) integrates a closed-loop cooling system (24) and an adjustable-angle compressed air nozzle (241), the airflow direction of the compressed air nozzle (241) is at an acute angle to the marking direction; the controller (4) is electrically connected to the drive motor (333), the support servo motor (344), the lifting module (22) and the horizontal moving device (23), receives the position signal of the laser head (21) and dynamically adjusts the matching relationship between the pipeline speed and the laser moving path.

2. The PVC pipe surface laser marking device according to claim 1, characterized in that, The height of the diamond-shaped raised texture of the elastic anti-slip layer is 0.5-1mm, the Shore hardness of the silicone layer is 60±5A, and the diamond texture is distributed in an alternating pattern on the wheel surface.

3. The laser marking device for the surface of a PVC pipe according to claim 1, characterized in that, An angle sensor (345) is provided at the hinge of the support arm (341). The angle sensor (345) and the support servo motor (344) form a closed-loop control system to adjust the clamping pressure of the support wheel (342) on the pipe in real time.

4. The laser marking device for the surface of a PVC pipe according to claim 1, characterized in that, The tilt angle and airflow pressure of the compressed air nozzle (241) are adjustable, and the airflow direction forms an acute angle with the marking direction.

5. The PVC pipe surface laser marking device according to claim 1, characterized in that, The marking mechanism (2) also includes a CCD camera (25), which detects the marking position on the pipe surface based on an image recognition algorithm and feeds back a position deviation correction signal to the controller (4).

6. The laser marking device for the surface of a PVC pipe according to claim 1, characterized in that, The polyurethane buffer support wheel (342) has a wheel diameter of 50-150mm and an annular groove (346) on the wheel surface with a groove depth of 1-2mm, which is used to increase the contact stability with the pipe surface.

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