Laser engraving equipment

Abstract

This utility model discloses a laser engraving equipment, including a protective chamber, a feeding device, a focusing component, and a laser light source component. The protective chamber has a processing space inside, and each of its two opposite sides has an opening connecting to the processing space. The feeding device includes a first tooling and a second tooling, each independently mounting a product. The focusing component and the laser light source component are located within the processing space. The laser beam from the laser light source component is focused by the focusing component, changing the spatial position of the focal point to engrave the desired pattern on the product. The first and second toolings alternately enter the processing space to work. When one is working, the other can simultaneously perform material loading and unloading operations, reducing the waiting time of the laser engraving equipment. This allows for increased production capacity of the laser engraving equipment without increasing the number of lasers and galvanometers, effectively reducing costs.

Description

Technical Field

[0001] This utility model relates to the field of automotive processing technology, and in particular to laser engraving equipment. Background Technology

[0002] With the intelligent and personalized development of the automotive industry, the function of car bumpers has gradually evolved from traditional collision protection to "safety + decoration + functional integration". In recent years, consumers' demand for personalized car exterior design has increased significantly, and bumpers with luminous functions have become an innovative point of competition for major car manufacturers due to their unique visual effects and technological feel.

[0003] Against this backdrop, laser engraving and paint stripping technology has become the preferred solution for processing the translucent areas of bumpers due to its high precision, non-contact nature, and lack of chemical pollution. Its principle is to selectively vaporize or peel off the opaque paint on the bumper surface using laser energy, while simultaneously avoiding damage to the underlying transparent substrate through parameter optimization (such as wavelength matching and energy density control).

[0004] However, the current way to increase the production capacity of laser engraving equipment is to increase the number of lasers and galvanometers, but the high cost of purchasing lasers and galvanometers leads to a significant increase in the overall investment in equipment. Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a laser engraving device that can increase production capacity and reduce costs by improving processing efficiency.

[0006] The laser engraving equipment according to an embodiment of the present utility model includes: A protective room, the interior of which is provided with a processing space, and each of the two opposite sides of the protective room has an opening that connects to the processing space; The feeding device includes a first tooling and a second tooling, each of which independently mounts a product; The focusing component is located within the processing space; A laser light source assembly is located within the processing space. The laser beam from the laser light source assembly is focused by the focusing assembly, and the spatial position of the focal point is changed to laser engrave the desired pattern on the product. The feeding device has a first state and a second state. In the first state, the first tooling is located inside the processing space and the second tooling is located outside the processing space. In the second state, the first tooling moves outside the processing space through one of the openings and the second tooling moves inside the processing space through the other opening.

[0007] The laser engraving equipment according to the embodiments of the present utility model has at least the following beneficial effects: the first tooling and the second tooling alternately enter the processing space to work. When one of them is in working state, the other can simultaneously perform material picking and loading operations, reducing the waiting time of the laser engraving equipment. Thus, the production capacity of the laser engraving equipment can be increased without increasing the number of lasers and galvanometers, effectively reducing costs.

[0008] According to some embodiments of the present invention, the feeding device includes a guide rail, a first slide table, and a second slide table. The guide rail includes a first guide section, a second guide section, and a third guide section. The second guide section is located within the processing space. The first guide section passes through one of the openings and is located outside the processing space. The third guide section passes through the other opening and is located outside the processing space. The first slide table and the second slide table are slidably disposed on the guide rail. The first tooling is installed on the first slide table, and the second tooling is installed on the second slide table.

[0009] According to some embodiments of the present invention, the feeding device includes a power mechanism for driving the first slide and the second slide to slide along the guide rail, wherein the first slide and the second slide are fixedly connected.

[0010] According to some embodiments of the present invention, the feeding device includes a protective cover, which is disposed on the guide rail, with one end connected to the end of the guide rail and the other end connected to the first slide table or the second slide table.

[0011] According to some embodiments of the present invention, a focusing component and a laser light source component constitute a set of paint stripping modules, and the laser engraving equipment includes 4 sets of paint stripping modules, which are arranged in a matrix.

[0012] According to some embodiments of the present invention, the focusing component includes a 3D galvanometer.

[0013] According to some embodiments of the present invention, the laser source assembly includes a violet laser.

[0014] According to some embodiments of the present invention, a roller shutter door is provided at the opening, and the roller shutter door is used to cover the opening.

[0015] According to some embodiments of the present invention, the laser engraving equipment further includes a negative pressure dust extraction system, which is used to extract smoke from the processing space and remove it from the processing space.

[0016] According to some embodiments of the present invention, the laser engraving equipment further includes a dust collector for treating dust and smoke, and the negative pressure dust collection system includes a dust collection pipe connected to the dust collector.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 A schematic diagram of a bumper to be processed by the laser engraving equipment according to an embodiment of this utility model; Figure 2 This is a schematic diagram of the laser engraving equipment according to an embodiment of the present utility model; Figure 3 for Figure 2 The image shows a front view of the laser engraving equipment. Figure 4 for Figure 2 The diagram shown is a schematic of the laser engraving equipment after the top part of the structure has been removed. Figure 5 for Figure 4 A top view of the laser engraving equipment shown; Figure 6 for Figure 5 A schematic diagram showing the connection between the bumper and the feeding device; Figure 7 for Figure 6 The diagram shown is a schematic of the feeding device with the first and second tooling concealed.

[0019] Figure label: 100. Bumper; 200. Protective enclosure; 210. Processing space; 220. Opening; 310. First tooling; 320. Second tooling; 330. Guide rail; 331. First guide section; 332. Second guide section; 333. Third guide section; 340. First slide table; 350. Second slide table; 360. Power mechanism; 370. Protective cover; 400. Focusing assembly; 500. Laser light source assembly; 600. Roller shutter door; 700. Dust removal duct; 800. Dust collector. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0023] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0024] Reference Figure 1 The laser-engraved areas on bumper 100 include four regions: A, B, C, and D. Regions A, B, and C are elongated strips, while region D is a diamond-shaped area. The laser-engraved areas on bumper 100 are characterized by their large size and high curvature. Bumper 100 is injection-molded from transparent particles, and its surface is coated with a transparent primer, color paint, and clear coat. The base of bumper 100 itself has high light transmittance; the core objective of laser engraving is to remove the surface paint layer, directly exposing the transparent base and creating a "window" through which light can pass. The transparent primer adheres to the plastic base, primarily enhancing the adhesion between the color paint and the substrate (preventing the color paint from peeling off). The color paint provides the basic color of bumper 100 (such as black or gray) but completely blocks light. The clear coat is the outermost protective coating, possessing high hardness and weather resistance.

[0025] Reference Figures 2 to 6The laser engraving equipment includes a protective enclosure 200, a feeding device, a focusing component 400, and a laser light source component 500. The protective enclosure 200 has a processing space 210 inside, and each of its two opposite sides has an opening 220 connecting to the processing space 210. The feeding device includes a first fixture 310 and a second fixture 320, each independently mounting a product. The focusing component 400 and the laser light source component 500 are located within the processing space 210. The laser beam from the laser light source component 500 is focused by the focusing component 400, changing the spatial position of the focal point to engrave the desired pattern on the product. The feeding device has a first state and a second state. In the first state, the first fixture 310 is located inside the processing space 210, and the second fixture 320 is located outside the processing space 210. In the second state, the first fixture 310 moves outside the processing space 210 through one of the openings 220, and the second fixture 320 moves inside the processing space 210 through the other opening 220.

[0026] The protective chamber 200 is the processing cavity of the laser engraving equipment. The processing space 210 provides a relatively enclosed processing environment to control the diffusion of pollutants such as paint mist and dust. The two openings 220 on opposite sides are the access channels for tooling, corresponding to the access channels for the left and right workstations respectively, which can form a left and right dual-workstation synchronous operation mode outside the protective chamber 200. The feeding device is the key to realizing "non-stop material change". Through the independent design of the first tooling 310 and the second tooling 320, the alternating entry and exit of the first tooling 310 and the second tooling 320 into the processing space 210 solves the problem of low efficiency caused by the need to stop the machine to change materials when using a single tooling. In the first state, the first fixture 310, carrying the pre-installed bumper 100, enters the processing space 210. The laser light source assembly 500 is activated, and the focusing assembly 400 laser-engraves the bumper 100 on the first fixture 310. The second fixture 320 is located on the right workstation outside the protective enclosure 200. The operator can remove the laser-engraved bumper 100 from the second fixture 320 and then fix the new bumper 100 to be processed onto the second fixture 320. After confirming the removal and placement is complete, the start button is pressed, and the second fixture 320 enters the "reservation state" (waiting for the first fixture 310 to complete the laser engraving). When the second fixture 320 completes the laser engraving, it exits the processing space 210 through the left opening 220 and enters the left workstation, ready for unloading and the next round of loading. Simultaneously, the second fixture 320 enters the protective enclosure 200 from the right workstation through the right opening 220 and reaches the processing position. The laser light source assembly 500 and the focusing assembly 400 begin laser engraving the bumper 100 on the second fixture 320. After the first fixture 310 returns to the left workstation, the operator repeats the "pick-up and drop-off" operation (removing the finished product from the first fixture 310 and placing the new product in), and enters the next cycle.

[0027] The first fixture 310 and the second fixture 320 move in and out synchronously, and so on. When one fixture is laser engraving, the other fixture can pick up and put down parts. Without adding core components such as the laser light source component 500 and the focusing component 400, the time overlap of "laser engraving" and "picking up and putting down parts" is achieved, which significantly improves the equipment's production capacity.

[0028] Reference Figure 6 and Figure 7 The feeding device includes a guide rail 330, a first slide table 340, and a second slide table 350. The guide rail 330 includes a first guide section 331, a second guide section 332, and a third guide section 333. The second guide section 332 is located within the processing space 210. The first guide section 331 passes through one of the openings 220 and is located outside the processing space 210. The third guide section 333 passes through the other opening 220 and is located outside the processing space 210. The first slide table 340 and the second slide table 350 are slidably mounted on the guide rail 330. A first tooling 310 is mounted on the first slide table 340, and a second tooling 320 is mounted on the second slide table 350. The guide rail 330 is the physical carrier for the movement of the slide table. The first guide section 331 passes through the left opening 220 of the protective enclosure 200 and extends to the left workstation area, providing a guiding path between the processing station and the left workstation for the first slide table 340. The second guide section 332 is located within the processing space 210 inside the protective enclosure 200, connecting the first and third guide sections 333. The third guide section 333 passes through the right-side opening 220 of the protective enclosure 200, extending to the right workstation area, providing a guide path for the second slide table 350 between the processing station and the right workstation. The guide rail 330 ensures that the slide table moves linearly along a fixed trajectory when entering and exiting the processing space 210, avoiding deviation.

[0029] The feeding device includes a power mechanism 360, which drives the first slide 340 and the second slide 350 to slide along the guide rail 330. The first slide 340 and the second slide 350 are fixedly connected. When the first slide 340 and the second slide 350 are fixedly connected and driven by the same power mechanism 360, the core design is to achieve mechanical linkage of "synchronous movement in the same direction." Compared with independent drive schemes, this structure can significantly improve the synchronization accuracy of dual-station switching and reduce control complexity, making it particularly suitable for the continuous operation requirements of the 100 laser engraving equipment for automotive bumpers. Specifically, the first slide 340 and the second slide 350 are fixed together by rigid connecting parts (such as welded steel plate frames or aluminum alloy connecting rods), forming a rigid system of "dual slides - power mechanism 360." The dual slides do not move independently; they move synchronously with the output of the power mechanism 360 (avoiding synchronization errors caused by independent drives). This reduces the number of drive components (requiring only one power mechanism 360), lowering equipment costs.

[0030] The feeding device includes a protective cover 370, which covers the guide rail 330 and has one end connected to the end of the guide rail 330, and the other end connected to the first slide table 340 or the second slide table 350. The protective cover 370 is typically made of flexible or stretchable material (such as a polytetrafluoroethylene film coated with a light-absorbing coating, or a stainless steel corrugated tube), and typically adopts a telescopic accordion-style structure. There are two sets of protective covers 370. One set of protective covers 370 has one end connected to the end of the first guide section 331 and the other end connected to the first slide table 340. The other set of protective covers 370 has one end connected to the end of the third guide section 333 and the other end connected to the second slide table 350.

[0031] A focusing component 400 and a laser source component 500 constitute a paint stripping module. The laser engraving equipment includes four paint stripping modules arranged in a matrix. These four modules represent a highly efficient solution for large-size, multi-area laser engraving needs, such as those found on car bumpers 100. This layout significantly improves equipment capacity and processing flexibility through parallel processing, area coverage, and resource coordination. The four modules can simultaneously engrave four independent areas of the bumper 100. Due to the large size of the car bumper 100, traditional single-module equipment requires tooling movement (such as sliding along guide rail 330) to cover the entire area, which is time-consuming and prone to introducing positioning errors. The matrix-arranged four modules can directly cover the entire size range of the bumper 100. The car bumper 100 requires laser engraving of two types of areas: long strips (areas A / B / C) and diamond-shaped grids (area D). The matrix-arranged four modules can adapt to different needs through functional partitioning or dynamic switching.

[0032] The surface of the car bumper 100 is a 3D curved surface (such as arc edges, local protrusions / depressions). Traditional 2D galvanometers, due to their fixed Z-axis, cannot adjust the laser focus height according to the curved surface, and cannot compensate for changes in surface height. This easily leads to blind spots, defocusing of the laser spot, or damage to the substrate, making it difficult to meet the laser engraving requirements of the car bumper 100. In contrast, the focusing component 400 includes a 3D galvanometer, which can laser engrave a range of 800mm*800mm*200mm. It can automatically zoom within this three-dimensional space, covering the maximum size of the bumper 100.

[0033] Traditional infrared lasers face a core bottleneck in laser engraving on car bumpers with clear varnish. The absorption rate of infrared laser light by the clear varnish is insufficient; most of the energy is reflected or penetrated, resulting in ineffective removal of the clear varnish and potential damage to the underlying substrate. This invention addresses this issue with a laser source assembly 500, which includes a violet laser that can be effectively absorbed by the clear varnish, making it suitable for laser engraving on products with clear varnish.

[0034] Reference Figure 4A roller shutter door 600 is provided at the opening 220 to cover the opening 220. During laser engraving, the roller shutter door 600 covers the opening 220 to reduce the diffusion of contaminants such as laser light, paint mist, and dust. After processing, the opening 220 is opened to facilitate the entry and exit of workpieces. The roller shutter door 600 typically includes a roller shutter door body, a drive system, and a guiding and sealing mechanism. The roller shutter door body can be made of PVC coated canvas or aluminum alloy strip curtain. The drive system consists of a servo motor, reduction gears, and a synchronous belt. The two sides of the roller shutter door body rise and fall synchronously under the drive of the synchronous belt. The guiding and sealing mechanism mainly refers to: guide grooves on both sides of the opening 220 to ensure minimal offset during the rise and fall of the roller shutter door 600; and rubber sealing strips at the bottom and top of the guide grooves, which fit tightly against the roller shutter door body when the roller shutter door 600 is fully closed.

[0035] Reference Figures 2 to 5 The laser engraving equipment also includes a negative pressure dust extraction system, which is used to extract fumes from the processing space 210. During the laser engraving process, the peeling of varnish and paint generates a large amount of fine fumes and dust. If not handled promptly, this can contaminate core components such as the focusing assembly 400 and the laser light source assembly 500, and also endanger the health of operators. The negative pressure dust extraction system provides crucial protection for stable equipment operation and workshop environmental safety by quickly removing pollutants from the processing space 210. The negative pressure dust extraction system can use a centrifugal high-pressure fan, which automatically adjusts the airflow according to the amount of processing fumes, ensuring that the processing space 210 is always under a slight negative pressure, preventing fumes from escaping through gaps.

[0036] The laser engraving equipment also includes a dust collector 800, which is used to treat dust and fumes. The negative pressure dust collection system includes a dust collection duct 700 connected to the dust collector 800. The negative pressure system is responsible for extracting the dust and fumes generated during processing from the processing space 210, while the dust collector 800 purifies these pollutants to achieve compliant emissions. A cyclone separator can be used inside the dust collector 800 to separate large dust particles from the airflow using centrifugal force. The dust collector 800 can also be equipped with a pleated cartridge filter (the filter media is PTFE-coated polyester fiber), which has a filtration efficiency of ≥99.5% for medium-sized dust particles of 5-10μm, and can also intercept some aerosols formed by fumes condensation. For fine dust and fumes particles of 0.3-5μm, an H14-grade HEPA filter can also be used inside the dust collector 800. To adsorb and remove volatile organic compounds (such as esters and ketones produced by the decomposition of varnish) in the fumes, honeycomb activated carbon can also be filled inside the dust collector 800.

[0037] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A laser engraving equipment, characterized in that, include: A protective room, the interior of which is provided with a processing space, and each of the two opposite sides of the protective room has an opening that connects to the processing space; The feeding device includes a first tooling and a second tooling, each of which independently mounts a product; The focusing component is located within the processing space; A laser light source assembly is located within the processing space. The laser beam from the laser light source assembly is focused by the focusing assembly, and the spatial position of the focal point is changed to laser engrave the desired pattern on the product. The feeding device has a first state and a second state. In the first state, the first tooling is located inside the processing space, and the second tooling is located outside the processing space. In the second state, the first tooling moves out of the processing space through one of the openings, and the second tooling moves into the processing space through the other opening.

2. The laser engraving equipment according to claim 1, characterized in that, The feeding device includes a guide rail, a first slide table, and a second slide table. The guide rail includes a first guide section, a second guide section, and a third guide section. The second guide section is located within the processing space. The first guide section passes through one of the openings and is located outside the processing space. The third guide section passes through the other opening and is located outside the processing space. The first slide table and the second slide table are slidably disposed on the guide rail. The first tooling is installed on the first slide table, and the second tooling is installed on the second slide table.

3. The laser engraving equipment according to claim 2, characterized in that, The feeding device includes a power mechanism for driving the first slide and the second slide to slide along the guide rail, and the first slide and the second slide are fixedly connected.

4. The laser engraving equipment according to claim 3, characterized in that, The feeding device includes a protective cover, which is placed over the guide rail and is connected at one end to the end of the guide rail and at the other end to the first slide or the second slide.

5. The laser engraving equipment according to claim 1, characterized in that, A focusing component and a laser light source component constitute a set of paint stripping modules. The laser engraving equipment includes four sets of paint stripping modules, which are arranged in a matrix.

6. The laser engraving equipment according to claim 1, characterized in that, The focusing component includes a 3D galvanometer.

7. The laser engraving equipment according to claim 1, characterized in that, The laser source component includes a violet laser.

8. The laser engraving equipment according to claim 1, characterized in that, The opening is provided with a roller shutter door, which is used to cover the opening.

9. The laser engraving equipment according to claim 1, characterized in that, The laser engraving equipment also includes a negative pressure dust extraction system, which is used to extract smoke from the processing space and remove it from the processing space.

10. The laser engraving equipment according to claim 9, characterized in that, The laser engraving equipment also includes a dust collector for treating dust and fumes, and the negative pressure dust collection system includes a dust collection pipe connected to the dust collector.

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