Automatic laser marking device for steel

Abstract

The utility model belongs to the technical field of steel processing equipment, and discloses an automatic laser marking device for steel, which comprises a rack, and a marking component and a cleaning component which are arranged on the rack, the cleaning component is arranged at the front end of the marking component, the cleaning component comprises two sleeves which are of a semicircular structure, and the two sleeves are arranged on the rack. The two sleeves are symmetrically arranged; the reversing plate is obliquely arranged on the inner wall of the sleeve; the gas outlet end of the gas ejector pipe faces the reversing plate, and the gas ejector pipe is connected with a high-pressure gas source; the clamping unit comprises two supports and an air cylinder, the supports are of semicircular structures, the two supports are symmetrically arranged, and the outer wall of the sleeve is in sliding connection with the inner walls of the supports; the steel pipe is wrapped by the two symmetrical semicircular sleeves to form an adaptive cavity, high-pressure airflow is sprayed to the reversing plates in the sleeves through the air spraying pipes, and the outer wall of the steel pipe is cleaned; the oil stain cleaning device solves the problem of oil stain cleaning of cylindrical steel.

Description

Technical Field

[0001] This solution belongs to the technical field of steel processing equipment, specifically involving a device for automatic laser marking of steel. Background Technology

[0002] The gauge length of steel is the core foundation for mechanical property testing, directly affecting the accuracy of key parameters such as elongation and yield strength. In tensile tests, the gauge length must strictly adhere to international standards (such as GB / T 228.1-2021). Improper gauge length setting can lead to deviations in the calculation of elongation after fracture or even misjudgment of material quality.

[0003] Laser gauge marks are formed on the surface of steel using a high-energy laser beam. A pulsed fiber laser (e.g., 450W peak power) or a continuous laser is used, with the beam diameter reduced to 0.06mm by a focusing lens. The gauge line is then directly etched onto the steel surface using the vaporization effect.

[0004] See the existing publication (announcement) document CN119141033A, which discloses a laser cutting device and operating method for processing English signs on steel structures. The device includes a cutting machine mounted on a machine tool, a rotating sleeve rotatably connected to the cutting machine, and a connecting part fixedly mounted on the rotating sleeve. The connecting part sequentially includes an oil stain detection part, a cleaning agent spraying part, a cleaning part, and a cleaning agent collection part, with the cleaning agent collection part relatively close to the rotating sleeve. The cleaning part includes a fixed sleeve fixedly mounted on the connecting part, and a connecting panel is provided below the fixed sleeve. Multiple rotating parts rotatably connected to the connecting panel are mounted on the connecting panel, and cleaning cotton cylinders are mounted on the rotating parts. A transmission part for driving the connecting panel to move up and down is provided inside the fixed sleeve. The cleaning agent spraying part sprays cleaning agent to clean oil stains. Under the action of the transmission part, the connecting panel causes the rotating parts to drive the cleaning cotton cylinders to spread the cleaning agent and treat the oil stains on the steel structure surface.

[0005] The cleaning unit structure used in the aforementioned device (such as a fixed scraper and cleaning cotton cylinder) is not suitable for cleaning cylindrical steel materials such as steel pipes. The cleaning unit of this device employs planar linear motion; the scraper and cleaning cotton cylinder achieve unidirectional wiping through the lifting and lowering motion of the connecting panel. However, steel pipes, being continuous circumferential curved surfaces, require a combined motion trajectory of circumferential rotation and axial movement to be synchronized during the cleaning process. Therefore, the cleaning cotton cylinder in the aforementioned device cannot rotate circumferentially with the steel pipe, resulting in the cleaning agent not evenly covering the cylindrical surface. Furthermore, the axial length of the steel pipe far exceeds that of ordinary signs, causing uneven distribution of contact pressure from traditional scrapers on the cylindrical curved surface, leading to localized excessive wear or incomplete cleaning. Utility Model Content

[0006] The purpose of this solution is to provide an automatic laser marking device for steel to solve the problem of cleaning oil stains from cylindrical steel.

[0007] To achieve the above objectives, this solution provides an automatic laser marking device for steel, including a frame and a marking assembly and a cleaning assembly mounted on the frame. The cleaning assembly is located at the front end of the marking assembly and includes:

[0008] A sleeve, wherein the sleeve is a semi-circular structure, and there are two sleeves, which are symmetrically arranged;

[0009] A reversing plate, wherein the reversing plate is inclinedly disposed on the inner wall of the sleeve;

[0010] The jet pipe has its outlet facing the reversing plate and is connected to a high-pressure air source.

[0011] A clamping unit for supporting the sleeve.

[0012] The principle and effect of this solution are as follows: the gauge length component is used to mark the steel pipe. The cleaning component forms a fitting cavity by wrapping the steel pipe with two symmetrical semi-circular sleeves. High-pressure airflow (pressure 0.5-3MPa) is injected into the reversing plate inclined inside the sleeve through the jet pipe. The airflow is guided by the reversing plate to form a spiral rotation and scouring, achieving 360° cleaning of the steel pipe and avoiding the problem of uneven contact between the traditional scraper and the curved surface.

[0013] Furthermore, the clamping unit includes a bracket and a cylinder. The bracket has a semi-circular structure, and there are two brackets arranged symmetrically. The outer wall of the sleeve is slidably connected to the inner wall of the bracket. The cylinder body is mounted on the frame, and the piston rod of the cylinder is connected to the bracket.

[0014] The principle and effect of this solution are as follows: the bracket is used to provide support for the rotation of the sleeve; the cylinder is used to drive the two brackets to move relative to or towards each other, so that the two sleeves close to form a complete enclosed cavity, so that the steel pipe to be cleaned is located in the cavity, thereby cleaning the outer wall of the steel pipe.

[0015] Furthermore, the inner wall of the bracket is provided with a slot, and the outer wall of the sleeve is provided with a protrusion that cooperates with the slot, the protrusion being slidably disposed in the slot; the sleeve and the bracket have the same radius of curvature.

[0016] The principle and effect of this solution are as follows: the groove and protrusion prevent the sleeve from detaching from the bracket, and the groove provides guidance for the rotation of the sleeve; the sleeve and the bracket have the same radius of curvature, so that the outer wall of the sleeve fits into the inner wall of the bracket.

[0017] Furthermore, the number of commutator plates is multiple, and the multiple commutator plates are arranged in a circumferential array along the center of the sleeve; the high-pressure gas source is nitrogen.

[0018] The principle and effect of this solution are as follows: Multiple reversing plates are installed, and the air source blowing towards the reversing plates drives them to rotate, thereby rotating the sleeve. A spiral airflow is formed inside the sleeve, covering and cleaning the outer wall of the steel pipe. After the gauge assembly marks the outer wall of the steel pipe, the marking area is cleaned again by the cleaning assembly. Nitrogen gas prevents oxidation of the marked area due to high temperature (locally ≥200℃) contact with air, thus avoiding discoloration of the gauge line edges.

[0019] Furthermore, the sleeve has several through holes, and the several through holes are arranged in a circumferential array along the center of the sleeve.

[0020] The principle and effect of this solution is as follows: by setting a through hole, the air source inside the sleeve can drive the dust out through the through hole.

[0021] Furthermore, the commutator plate has a groove, and a support rod is slidably disposed in the groove. One end of the support rod passes through the groove and is connected to a scraper.

[0022] The principle and effect of this solution are as follows: After cutting or shot blasting, steel pipes produce metal powder and debris on their surface. This solution cleans the surface of the steel pipe using a scraper and high-pressure nitrogen gas. As the sleeve rotates, the scraper adheres closely to the surface of the steel pipe, scraping away the metal debris embedded in the surface patterns after cutting or shot blasting.

[0023] Furthermore, a spring is connected to the free end of the support rod, and the free end of the spring is fixedly connected to the groove.

[0024] The principle and effect of this solution are as follows: a spring is set up, and the elastic force of the spring drives the support rod to move the scraper to fit tightly against the surface of the steel pipe, which can adapt to steel pipes of different diameters.

[0025] Furthermore, the scraper has a collection groove, and a permanent magnet is installed in the collection groove.

[0026] The principle and effect of this solution are as follows: permanent magnets are used to attract metal powder scraps that have fallen off the scraper and absorb them into the collection tank.

[0027] Furthermore, a liquid delivery pipe is inclinedly arranged on the support, with the liquid outlet end of the liquid delivery pipe facing the center of the sleeve. The liquid outlet end of the liquid delivery pipe has a wedge-shaped structure and a sealing ball is provided at the liquid outlet end. The sealing ball is a magnetic sealing ball that repels the permanent magnet. The permanent magnet is used to drive the sealing ball away from the liquid outlet end.

[0028] The principle and effect of this solution are as follows: Since the steel pipe surface is contaminated with oil, it is difficult to remove the oil simply by scraping and nitrogen purging. Therefore, a liquid delivery pipe is installed to spray cleaning agent onto the steel pipe to clean the oil. When the sleeve drives the scraper to rotate circumferentially, the permanent magnet rotates circumferentially as well. When the permanent magnet rotates to the outlet end near the liquid delivery pipe, the sealing ball repels the permanent magnet, causing the sealing ball to move away from the outlet end. The cleaning agent in the liquid delivery pipe is then sprayed onto the steel pipe, and with the cooperation of the scraper, the cleaning agent is spread evenly on the steel pipe, thereby cleaning the oil.

[0029] Furthermore, the sealing ball is connected to a compression spring, and the free end of the compression spring is fixedly connected to the inner wall of the liquid delivery pipe; a sliding groove is provided in the groove, and the support rod is slidably connected to the sliding groove.

[0030] The principle and effect of this solution are as follows: the preload of the compression spring drives the sealing ball to reset and seal the liquid outlet end; the slide groove is used to provide positioning and guidance for the support rod to move in the groove. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of an automatic laser marking device for steel according to the present invention;

[0032] Figure 2 This is a schematic diagram of the structure of the cleaning component of this utility model. Figure 1 ;

[0033] Figure 3 This is a schematic diagram of the structure of the cleaning component of this utility model. Figure 2 ;

[0034] Figure 4 This is a schematic diagram of the internal structure of the cleaning component of this utility model;

[0035] Figure 5 This is a schematic diagram of the internal structure of the commutator plate of this utility model;

[0036] Figure 6 This is a schematic diagram of the liquid delivery tube of this utility model;

[0037] Figure 7 This is a schematic diagram of the gauge length component of this utility model.

[0038] The corresponding labels in the attached diagram are named as follows: Frame 1, Gauge assembly 2, Cleaning assembly 3, Support 31, Sleeve 32, Through hole 321, Reversing plate 33, Groove 331, Jet pipe 34, Cylinder 35, Support rod 36, Spring 361, Scraper 37, Collection trough 371, Permanent magnet 38, Liquid delivery pipe 39, Sealing ball 310, Compression spring 311, Steel pipe 4. Detailed Implementation

[0039] The following will describe the concept and technical effects of this utility model clearly and completely with reference to the embodiments, so as to fully understand the purpose, features and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model.

[0040] Example:

[0041] Please see Figure 1 and Figure 7 An automatic laser marking device for steel includes a frame 1, a marking assembly 2, and a cleaning assembly 3. The frame 1 is a welded frame structure made of Q235B steel. The marking assembly 2 uses a high-power, high-precision pulsed laser head, capable of emitting a high-energy-density laser beam that can quickly ablate clear marking lines on the steel surface. Furthermore, the laser head parameters (such as power and frequency) can be precisely adjusted through a control system to adapt to the marking requirements of steel of different materials and specifications. The marking assembly 2 is equipped with X, Y, and Z-axis motion mechanisms: the X-axis and Y-axis motion mechanisms are mounted perpendicularly to each other on the support frame, forming a two-dimensional planar motion system. It uses high-precision ball screws and linear guides, driven by a servo motor, achieving a positioning accuracy of ±0.1mm. This allows for precise control of the laser head's position on the horizontal plane, meeting the marking requirements of different marking patterns and positions. The Z-axis motion mechanism is used to adjust the height of the laser head. It employs an electric lifting platform controlled by a stepper motor, automatically adjusting the distance between the laser head and the steel surface according to the steel thickness to ensure the laser is always focused on the steel surface, guaranteeing marking quality. Simultaneously, the frame 1 also includes a conveyor belt and positioning fixtures (not shown). The conveyor belt, made of wear-resistant rubber and driven by a motor, continuously transports steel at an adjustable speed. The positioning fixtures, installed on both sides of the conveyor belt and controlled by cylinders, quickly and accurately position the steel at the marking location, ensuring positional accuracy for each marking. The system also includes a control system: centered on an industrial computer and equipped with dedicated marking control software. The control system is connected to the laser head, each axis motion mechanism, and the steel conveying and positioning mechanism. Operators can input the steel specifications (such as length, width, thickness, and material) and marking requirements (such as gauge length, gauge spacing, and marking pattern) through the software interface. The control system automatically calculates and controls the movement of each component based on these parameters, achieving an automated marking process. The gauge length component 2 described above is a prior art well known to those skilled in the art. For the specific structure, please refer to the patent document CN119141033A. It will not be elaborated further here.

[0042] Please see 2- Figure 6The system also includes a cleaning component 3 mounted on the frame 1. In this embodiment, steel pipe 4 is used as the steel material. The cleaning component 3 cleans the outer wall of the steel pipe 4 to remove dust, debris, and oil stains. The cleaning component 3 includes a sleeve 32, a reversing plate 33, an air jet pipe 34, a bracket 31, and a cylinder 35. The sleeve 32 is a semi-circular sleeve with a radius of curvature R=150mm (suitable for Φ300mm steel pipe). The outer wall of the sleeve 32 has a T-shaped protrusion along its length, which forms a sliding pair with the dovetail groove on the inner wall of the bracket 31. The axial sliding stroke is 200mm. The sleeve 32 has several through holes 321, which are arranged in a circumferential array around the center of the sleeve 32. The reversing plates 33 consist of four circumferentially spaced plates 33, which are inclined at a 30° angle to the inner wall of the sleeve 32. The outlet end of the jet pipe 34 extends into the sleeve 32 and is equipped with a Laval nozzle, which is connected to a high-pressure nitrogen tank. The working pressure is 2.5 MPa, and the outlet end of the jet pipe 34 is inclined towards the reversing plate 33. The bracket 31 is made of ZG270-500 cast steel. The radius of curvature of the bracket 31 is the same as that of the sleeve 32, and the inner wall of the bracket 31 has a groove that matches the protrusion, allowing the sleeve 32 to rotate circumferentially along the inner wall of the bracket 31. The semi-circular inner cavity forms a 0.2 mm clearance fit with the sleeve 32. The cylinder 35 has a cylinder diameter of 100 mm and a stroke of 300 mm. The cylinder body of the cylinder 35 is mounted on the frame 1, and the piston rod of the cylinder 35 is connected to the bracket 31. When cylinder 35 pushes the two supports 31 to close (see...) Figure 3 The sleeve assembly forms a closed cavity, with the steel pipe 4 centered inside the closed cavity.

[0043] In actual operation, cylinder 35 drives two supports 31 to move relative to or towards each other, thereby closing the two sleeves 32 to form a complete enclosed cavity, so that the steel pipe 5 to be cleaned is located in the cavity. High-pressure nitrogen gas flow (pressure 0.5-3MPa) is sprayed through jet pipe 34 onto the reversing plate 33 inclined on the inner wall of sleeve 32. The gas flow is guided by the reversing plate 33 to form a spiral rotation and scouring, thereby achieving 360° cleaning of steel pipe 4.

[0044] Please see Figure 4 and Figure 5The reversing plate 33 has a groove 331, within which a support rod 36 is slidably mounted. A spring 361 is connected to the free end of the support rod 36, and the free end of the spring 361 is fixedly connected to the groove 331. A sliding groove is also provided within the groove 331, through which the support rod 36 is slidably connected. The sliding groove provides positioning and guidance for the movement of the support rod 36. One end of the support rod 36 passes through the groove 331 and is connected to a scraper 37. The radius of curvature of the scraper 37 is the same as that of the steel pipe 4 to be cleaned, ensuring a tight fit between the scraper 37 and the steel pipe 4, thereby cleaning metal debris and oil stains from the steel pipe 4. The scraper 37 has a collection groove 371, within which a permanent magnet 38 is installed. A liquid delivery pipe 39 is inclinedly arranged on the bracket 31. The liquid delivery pipe 39 extends into the sleeve 32, and the liquid outlet end of the liquid delivery pipe 39 faces the center of the sleeve 32. The liquid outlet end of the liquid delivery pipe 39 has a wedge-shaped structure. A sealing ball 310 is provided at the liquid outlet end of the liquid delivery pipe 39. The sealing ball 310 is a magnetic sealing ball 310 and is mutually repelled by the permanent magnet 38. The sealing ball 310 is connected to a compression spring 311. The free end of the compression spring 311 is fixedly connected to the inner wall of the liquid delivery pipe 39. The preload of the compression spring 311 drives the sealing ball 310 to reset and seal the liquid outlet end. The permanent magnet 38 is used to drive the sealing ball 310 away from the liquid outlet end.

[0045] In actual operation, when the sleeve 32 rotates, the scraper 37 adheres closely to the surface of the steel pipe 4, scraping away metal debris embedded in the surface anchor pattern after cutting or shot blasting. Simultaneously, the permanent magnet 38 is used to adsorb the metal dust scraped off by the scraper and absorb it into the collection tank 371. When the permanent magnet 38 rotates to a position close to the outlet end of the liquid delivery pipe 39, the sealing ball 310 repels the permanent magnet 38, causing the sealing ball 310 to move away from the outlet end. The cleaning agent in the liquid delivery pipe 39 is then sprayed onto the steel pipe 4, and with the cooperation of the scraper 37, the cleaning agent is spread evenly on the steel pipe 4, thereby cleaning the oil stains.

[0046] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An automatic laser marking device for steel, comprising a frame (1) and a marking assembly (2) and a cleaning assembly (3) disposed on the frame (1), characterized in that, The cleaning component (3) is disposed at the front end of the gauge length component (2), and the cleaning component (3) includes: Sleeve (32), wherein the sleeve (32) is a semi-circular sleeve (32), and there are two sleeves (32) arranged symmetrically; A reversing plate (33) is inclinedly disposed on the inner wall of the sleeve (32); The jet pipe (34) has its outlet facing the reversing plate (33) and is connected to a high-pressure air source. A clamping unit for supporting the sleeve (32).

2. The device for automatic laser marking of steel according to claim 1, characterized in that: The clamping unit includes a bracket (31) and a cylinder (35). The bracket (31) has a semi-circular structure. There are two brackets (31), and the two brackets (31) are symmetrically arranged. The outer wall of the sleeve (32) is slidably connected to the inner wall of the bracket (31). The cylinder body of the cylinder (35) is located on the frame (1), and the piston rod of the cylinder (35) is connected to the bracket (31).

3. The device for automatic laser marking of steel according to claim 2, characterized in that: The inner wall of the bracket (31) is provided with a slot, and the outer wall of the sleeve (32) is provided with a protrusion that matches the slot. The protrusion is slidably disposed in the slot. The sleeve (32) and the bracket (31) have the same radius of curvature.

4. The device for automatic laser marking of steel according to claim 1, characterized in that: The number of the commutator plates (33) is multiple, and the multiple commutator plates (33) are arranged in a circumferential array along the center of the sleeve (32); the high-pressure gas source is nitrogen.

5. The device for automatic laser marking of steel according to claim 1, characterized in that: The sleeve (32) has several through holes (321), and the several through holes (321) are arranged in a circumferential array along the center of the sleeve (32).

6. The device for automatic laser marking of steel according to claim 2, characterized in that: The reversing plate (33) has a groove (331), and a support rod (36) is slidably provided in the groove (331). One end of the support rod (36) passes through the groove (331) and is connected to a scraper (37).

7. The device for automatic laser marking of steel according to claim 6, characterized in that: The free end of the support rod (36) is connected to a spring (361), and the free end of the spring (361) is fixedly connected to the groove (331).

8. The device for automatic laser marking of steel according to claim 6, characterized in that: The scraper (37) has a collection groove (371), and a permanent magnet (38) is provided in the collection groove (371).

9. The device for automatic laser marking of steel according to claim 8, characterized in that: The support (31) is inclinedly provided with a liquid delivery pipe (39), the liquid outlet of the liquid delivery pipe (39) is facing the center of the sleeve (32), the liquid outlet of the liquid delivery pipe (39) is a wedge-shaped structure, the liquid outlet of the liquid delivery pipe (39) is provided with a sealing ball (310), the sealing ball (310) is a magnetic sealing ball (310) and is mutually repelled by the permanent magnet (38), the permanent magnet (38) is used to drive the sealing ball (310) away from the liquid outlet.

10. The device for automatic laser marking of steel according to claim 9, characterized in that: The sealing ball (310) is connected to a compression spring (311), and the free end of the compression spring (311) is fixedly connected to the inner wall of the liquid delivery pipe (39); a sliding groove is provided in the groove (331), and the support rod (36) is slidably connected to the sliding groove.

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