Laser engraving device for decorative wood processing

Abstract

The invention discloses a laser engraving device for decorative wood processing, which comprises a device seat, a protection assembly, a dust collection assembly and a cooling assembly, an engraving track is fixedly arranged at the upper end of the device seat through a stand column, a laser head is movably mounted on the engraving track, and a display is fixedly mounted on the side wall of the device seat. Hydraulic fixing pieces are arranged on the two sides of the upper end of the device base, pressing plates are fixedly installed at the lower ends of the hydraulic fixing pieces, and pressure sensors are fixedly installed on the pressing plates. The laser protection device has the flexible laser protection effect, the fixed protection cover is prevented from hindering wood feeding and laser head maintenance, laser leakage and wood chip splashing can be effectively blocked, the protection air bag is made of a high-strength elastic rubber material, arc-shaped protruding structures are further evenly distributed on the inner side wall, the protection effect is guaranteed, and meanwhile the protection effect is improved. Slight collision can be buffered through self elasticity, and protection safety and durability are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser engraving, in particular to a laser engraving device for decorative wood processing. BACKGROUND

[0002] The existing laser engraving device is provided with a gas jet device during engraving. The gas jet device can quickly cool the edge of the engraved workpiece to prevent damage to the workpiece, and can also blow away the debris on the surface of the workpiece. A part of the debris falls into the cavity at the bottom. Although it can achieve the effect of dust removal, when the wood chips accumulate too much, they will be blown out of the cavity, affecting the work, and need to be cleaned constantly, which greatly affects the work efficiency. The general laser engraving device is not very convenient to clean, and it takes a long time to clean, which affects the work efficiency to some extent.

[0003] In view of the above problems, the invention patent with publication number "CN108406125A" discloses a laser engraving device for decorative wood processing, which comprises a supporting leg, a supporting table is welded on the surface of the supporting leg, a dust removal mechanism is provided through the supporting table, the surface of the supporting table is convex, a first side plate is welded on the surface of the supporting table, a horizontal rod is welded on the surface of the first side plate, a laser engraving machine is arranged on the surface of the horizontal rod, and a second side plate is welded on the surface of the supporting table. Although this scheme can effectively absorb and remove the wood dust generated during the engraving and decoration of wood, it has shortcomings in cooling the laser head after engraving. When the laser head is working, the laser generator and the laser focusing lens will generate a large amount of heat. If it is not cooled in time, it will directly cause a series of problems, such as aging of the pipe wall and energy attenuation of the laser tube or laser module, and even direct burning. Moreover, the above-mentioned scheme does not provide an effective solution to the protection work during laser engraving. If the protective cover is used for a long time, it will affect the feeding and maintenance work of the laser head. If the protective cover is not used, there is a certain safety hazard during laser engraving. SUMMARY

[0004] The present application aims to solve the problems existing in the prior art and provides a laser engraving device for decorative wood processing.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: A laser engraving device for decorative wood processing, comprising a device seat, a protection assembly, a dust suction assembly and a cooling assembly, a carving track is fixedly arranged on the upper end of the device seat through a stand, a laser head is movably installed on the carving track, a display is fixedly installed on the side wall of the device seat, hydraulic fixing pieces are arranged on both sides of the upper end of the device seat, a pressing plate is fixedly installed at the lower end of the hydraulic fixing piece, and a pressure sensor is fixedly installed on the pressing plate. The protection assembly is composed of a C-shaped fence and a protection air bag, which are used to protect the device during carving, the upper and lower ends of the fence are open and fixed along the upper side of the device seat, the protection air bag is longitudinally and elastically arranged in the fence, and a control mechanism for controlling the extension and retraction of the protection air bag is mounted on the side wall of the fence. The dust suction assembly is composed of a dust suction head, a dust suction pipe, a negative pressure pipe and a dust storage box, which are used to suck the wood dust generated during carving, the dust suction head is fixedly arranged around the laser head, the dust suction pipe is communicatively arranged between the dust suction head and the dust storage box, and the negative pressure pipe is communicatively arranged between the dust storage box and the protection air bag. The cooling assembly is composed of a liquid storage box and an exhaust pipe, which are used to cool the laser head by returning cold air to the dust suction head after carving, the liquid storage box is fixedly arranged at the upper end of the dust storage box and stores cooling liquid, and the exhaust pipe is communicatively arranged between the dust suction pipe and the protection air bag, and a U-shaped structure is arranged in the liquid storage box.

[0006] Preferably, the control mechanism comprises a reversible motor, a threaded rod and a threaded sleeve, the reversible motor is fixedly mounted on the side wall of the fence through a fixed plate, the threaded rod is coaxially and fixedly connected with the output shaft of the reversible motor and is rotatably connected to the upper end of the fixed plate, the threaded sleeve is threadedly connected to the threaded rod and is fixedly connected with the upper end of the protection air bag, the other side of the fence is provided with a guide mechanism, and the reversible motor is electrically connected with the pressure sensor.

[0007] Preferably, the guide mechanism comprises a guide rod and a guide sleeve, the guide rod is fixedly mounted on the side wall of the fence, and the guide sleeve is slidably connected to the guide rod and is fixedly connected with the upper end of the protection air bag, and the guide sleeve and the threaded sleeve are fixedly connected through a connecting rod.

[0008] Preferably, a first electrically controlled one-way valve allowing gas to flow only from the dust suction pipe to the dust storage box is mounted at the communication position of the dust suction pipe and the dust storage box, a second electrically controlled one-way valve allowing gas to flow only from the dust storage box to the protection air bag is mounted on the negative pressure pipe, and the first and second electrically controlled one-way valves are electrically connected with the pressure sensor.

[0009] Preferably, a third electrically controlled one-way valve allowing gas to flow only from the protection air bag to the dust suction pipe is mounted on the exhaust pipe, and the electrically controlled one-way valve is electrically connected with the pressure sensor.

[0010] Preferably, a dustproof net is mounted at the connection position of the negative pressure pipe and the dust storage box.

[0011] Preferably, a cooling assembly is mounted on the liquid storage box, the cooling assembly is composed of a plurality of copper heat sinks, the heat sinks are fixedly connected through a strip-shaped plate, and the strip-shaped plate and the connecting rod are fixedly connected through a bent rod.

[0012] Preferably, the protective air bag is made of high-strength elastic rubber material, and the inner side wall is uniformly distributed with a plurality of arc-shaped protruding structures.

[0013] Preferably, the heat dissipation fins are arranged in a wave shape, and the spacing between adjacent two heat dissipation fins is 8-12mm.

[0014] The present application has the following beneficial effects: 1. The present application has flexible laser protection effect, the protection assembly is composed of a C-shaped fence and a protective air bag, the fence is fixed along the upper side edge of the device seat, and can form a basic protection boundary, the protective air bag is longitudinally and elastically arranged in the fence, the control mechanism of the fence side wall can adjust the expansion and contraction of the protective air bag, and the guiding mechanism can make the protective air bag move smoothly and accurately, the protection range can be adjusted according to the engraving requirements of wood materials of different sizes, the fixed protective cover can avoid hindering the wood feeding and laser head maintenance, and can effectively block the laser leakage and wood dust splashing, the protective air bag is made of high-strength elastic rubber material, and the inner side wall is also uniformly distributed with arc-shaped protruding structures, which can ensure the protection effect, buffer slight collision through the elasticity, and improve the protection safety and durability. 2. The present application has outstanding dust collection effect, the dust collection assembly includes a dust collection head, a dust collection pipe, a negative pressure pipe and a dust storage box, the dust collection head is fixedly arranged around the laser head, can capture wood dust generated in the engraving process at a short distance, reduces dust diffusion, the dust collection pipe is connected with the dust collection head and the dust storage box, can transport the collected dust into the dust storage box, the negative pressure pipe is connected with the dust storage box and the protective air bag, can enhance the dust collection power by means of the negative pressure generated by the expansion of the protective air bag, the dust collection pipe is provided with a first electric control check valve at the connection with the dust storage box, and the negative pressure pipe is provided with a second electric control check valve, both of which are electrically connected with the pressure sensor, can prevent gas backflow, ensure continuous and stable dust collection process, in addition, the dust screen installed at the connection between the negative pressure pipe and the dust storage box can prevent large particle wood dust from entering the negative pressure pipe and causing blockage, ensure long-term and efficient operation of the dust collection assembly, reduce environmental dust pollution and cleaning frequency.

[0015] 3、The application has remarkable effect in laser head cooling, the cooling assembly is composed of a liquid storage box and an exhaust pipe, the liquid storage box is fixed to the upper end of the dust storage box and stores cooling liquid, the exhaust pipe is communicated with the dust suction pipe and the protective air bag, and the part located in the liquid storage box is provided with a U-shaped structure, the U-shaped structure is immersed in the cooling liquid, after engraving, the gas in the protective air bag flows through the exhaust pipe, exchanges heat with the cooling liquid through the U-shaped structure, forms cold air and returns to the dust suction pipe, and then acts on the laser head to realize cooling, avoids problems such as energy attenuation and component burning of the laser head due to high temperature, and the liquid storage box is also provided with a cooling assembly composed of a plurality of copper heat dissipation fins, the heat dissipation fins are fixed through a strip-shaped plate, the strip-shaped plate and the connecting rod are fixedly connected through a bent rod, the copper material has good heat conductivity, can quickly dissipate the heat absorbed by the cooling liquid, maintains the low-temperature state of the cooling liquid, and the connecting rod drives the heat dissipation fins to move vertically along with the expansion and contraction of the protective air bag, strengthens the heat exchange effect of the heat dissipation fins, ensures that the cooling liquid is in a low-temperature state, further improves the heat dissipation efficiency, and guarantees long-term stable work of the laser head. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a front structure schematic view of a laser engraving device for decorative wood processing provided by the application; Figure 2 It is a side structure schematic view of a laser engraving device for decorative wood processing provided by the application; Figure 3 It is a side structure schematic view of a cooling assembly provided by the application; Figure 4 It is an internal structure schematic view of a cooling assembly provided by the application; Figure 5 It is a side structure schematic view of a cooling assembly provided by the application; Figure 6 It is an internal structure schematic view of a cooling assembly provided by the application; Figure 7 It is Figure 6 the enlarged schematic view of the structure at A.

[0017] In the figure: 1, device seat; 2, stand; 3, engraving track; 4, laser head; 5, display; 6, fence; 7, protective air bag; 8, fixed plate; 9, forward and reverse motor; 10, threaded rod; 11, threaded sleeve; 12, hydraulic fixing piece; 13, pressing plate; 14, pressure sensor; 15, dust suction head; 16, dust suction pipe; 17, dust storage box; 18, negative pressure pipe; 19, first electric control one-way valve; 20, second electric control one-way valve; 21, guide rod; 22, guide sleeve; 23, connecting rod; 24, liquid storage box; 25, exhaust pipe; 26, third electric control one-way valve; 27, U-shaped structure; 28, heat dissipation fin; 29, strip-shaped plate; 30, bent rod. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Embodiment 1

[0019] With reference to Figures 1-2 The laser engraving device for decorative wood processing comprises a device seat 1, a protection assembly and a dust suction assembly. The device seat 1 is provided with an engraving track 3 fixedly arranged at the upper end through a stand 2. A laser head 4 is movably arranged on the engraving track 3. A display 5 is fixedly arranged on the side wall of the device seat 1. Hydraulic fixing pieces 12 are arranged on both sides of the upper end of the device seat 1. Pressure plates 13 are fixedly arranged at the lower ends of the hydraulic fixing pieces 12. Pressure sensors 14 are fixedly arranged on the pressure plates 13.

[0020] The protection assembly comprises a fence 6 arranged in a C shape and a protection air bag 7. The fence 6 is arranged along the upper side of the device seat 1 and is provided with openings at the upper and lower ends. The protection air bag 7 is arranged in the fence 6 in an elastic manner in the longitudinal direction. A control mechanism for controlling the extension and retraction of the protection air bag 7 is arranged on the side wall of the fence 6. The protection air bag 7 is made of high-strength elastic rubber material. The inner side wall of the protection air bag 7 is uniformly provided with a plurality of arc-shaped protruding structures.

[0021] The control mechanism comprises a reversible motor 9, a threaded rod 10 and a threaded sleeve 11. The reversible motor 9 is fixedly arranged on the side wall of the fence 6 through a fixed plate 8. The threaded rod 10 is rotatably connected to the upper end of the fixed plate 8 and is fixedly connected to the output shaft of the reversible motor 9 in a coaxial manner. The threaded sleeve 11 is threadedly connected to the threaded rod 10 and is fixedly connected to the upper end of the protection air bag 7. A guide mechanism is arranged on the other side of the fence 6. The reversible motor 9 is electrically connected to the pressure sensor 14.

[0022] The guide mechanism comprises a guide rod 21 and a guide sleeve 22. The guide rod 21 is fixedly arranged on the side wall of the fence 6. The guide sleeve 22 is slidably connected to the guide rod 21 and is fixedly connected to the upper end of the protection air bag 7. The guide sleeve 22 and the threaded sleeve 11 are fixedly connected through a connecting rod 23.

[0023] The dust suction assembly is composed of a dust suction head 15, a dust suction pipe 16, a negative pressure pipe 18 and a dust storage box 17, which are used to suck the wood dust generated during the carving. The dust suction head 15 is fixedly arranged around the laser head 4, the dust suction pipe 16 is communicatively arranged between the dust suction head 15 and the dust storage box 17, and the negative pressure pipe 18 is communicatively arranged between the dust storage box 17 and the protective air bag 7. A first electrically controlled one-way valve 19 allowing gas to flow only from the dust suction pipe 16 to the dust storage box 17 is installed at the communication position of the dust suction pipe 16 and the dust storage box 17, and a second electrically controlled one-way valve 20 allowing gas to flow only from the dust storage box 17 to the protective air bag 7 is installed on the negative pressure pipe 18. The first electrically controlled one-way valve 19 and the second electrically controlled one-way valve 20 are electrically controlled and connected with the pressure sensor 14. A dustproof screen is installed at the connection position of the negative pressure pipe 18 and the dust storage box 17.

[0024] In the embodiment, the protective air bag 7 is provided with an exhaust port, and a one-way exhaust valve allowing gas to flow only in one direction is arranged in the exhaust port. When the laser carving device is used for processing decorative wood, first, the wood is placed on the upper end of the device seat 1. After the wood is placed, the hydraulic fixing part 12 is controlled to extend downward, and the pressing plate 13 is pushed to be pressed on the surface of the wood until the pressure sensor 14 on the pressing plate 13 detects a preset pressure value, and the hydraulic fixing part 12 stops working, thereby realizing stable fixing of the wood. At this time, the pressure sensor 14 transmits an electric signal to start the forward and reverse motor 9 in the control mechanism. The output shaft of the forward and reverse motor 9 drives the threaded rod 10 to rotate, and the threaded sleeve 11 connected with the threaded rod 10 through threads moves upward, and the guide sleeve 22 connected with the threaded sleeve 11 through the connecting rod 23 slides upward along the guide rod 21, thereby driving the protective air bag 7 to stretch upward and achieving the protection effect. Subsequently, after entering the carving stage, the laser head 4 is started, the laser head 4 moves along the carving track 3 and performs carving work on the wood, and the display 5 can display the carving parameters and progress in real time.

[0025] During the carving process, the dust suction assembly works synchronously. After the pressure sensor 14 detects that the wood is fixed, the first electrically controlled one-way valve 19 and the second electrically controlled one-way valve 20 are synchronously controlled to be opened. Since the protective air bag 7 is in the stretched state, the internal space is relatively stable. A negative pressure is formed in the dust storage box 17 through the negative pressure pipe 18, thereby causing the dust suction head 15 around the laser head 4 to generate suction force, sucking the wood dust generated during the carving into the dust suction pipe 16 and then into the dust storage box 17 for collection. The second electrically controlled one-way valve 20 prevents the gas and dust in the dust storage box 17 from flowing backward into the protective air bag 7, thereby ensuring continuous and effective dust suction.

[0026] When it is necessary to pause the carving or replace the wood, the laser head 4 is first turned off, and then the forward and reverse motor 9 is controlled to drive the protective air bag 7 to contract downward. At the same time, the one-way exhaust valve in the exhaust port of the protective air bag 7 is opened to exhaust part of the gas in the protective air bag 7, so as to quickly open the protection area for subsequent operation. Embodiment 2

[0027] Referring to Figures 3-4 Unlike example 1, this embodiment also includes a cooling assembly composed of a liquid storage box 24 and an exhaust pipe 25 for cooling the laser head 4 with cold air flowing back to the suction head 15 after engraving. The liquid storage box 24 is fixed on the upper end of the dust storage box 17 and stores cooling liquid. The exhaust pipe 25 is connected between the suction pipe 16 and the protective air bag 7. The U-shaped structure 27 in the liquid storage box 24 is immersed in the cooling liquid.

[0028] The third electrically controlled one-way valve 26 is installed on the exhaust pipe 25, which allows gas to flow from the protective air bag 7 to the suction pipe 16. The electrically controlled one-way valve is electrically controlled and connected with the pressure sensor 14.

[0029] In this embodiment, the exhaust port is removed, and the engraving process is the same as example 1. When the engraving is completed, the laser head 4 is turned off, the hydraulic fixing part 12 is loosened upward, the pressure sensor 14 sends a signal to control the reversible motor 9 to reverse, which drives the protective air bag 7 to contract downward, and the gas inside is squeezed. At the same time, the third electrically controlled one-way valve 26 on the exhaust pipe 25 is opened by the pressure sensor 14, and the gas in the protective air bag 7 flows to the suction pipe 16 through the exhaust pipe 25. Since the part of the exhaust pipe 25 in the liquid storage box 24 is a U-shaped structure 27, and the liquid storage box 24 stores cooling liquid, the U-shaped structure 27 is immersed in the cooling liquid. When the gas flows through the U-shaped structure 27, it exchanges heat with the cooling liquid, the temperature decreases to form cold air, the cold air enters the suction pipe 16 through the exhaust pipe 25 and the third electrically controlled one-way valve 26, and then blows to the laser head 4 through the suction head 15, achieving the cooling of the laser head 4. Example 3

[0030] Referring to Figures 5-7 The difference between this embodiment and example 2 is that the cooling assembly is installed on the liquid storage box 24, which is composed of several copper heat sinks 28. The several heat sinks 28 are fixed and connected by a strip-shaped plate 29, and the strip-shaped plate 29 is fixed and connected with the connecting rod 23 by a bent rod 30.

[0031] The heat sink 28 is arranged in a wave shape, and the spacing between adjacent two heat sinks 28 is 8-12mm.

[0032] In this embodiment, the cooling assembly on the liquid storage box 24 works synchronously during the cooling process of the laser head after the completion of the engraving in example 2. The strip-shaped plate 29 and the heat sink 28 are vertically moved with the expansion and contraction of the protective air bag 7. The excellent thermal conductivity of copper material can quickly dissipate the heat absorbed by the cooling liquid, and the wave shape and the adjacent spacing of 8-12mm increase the heat dissipation area, further improve the heat dissipation efficiency, ensure that the cooling liquid is always in a low temperature state, and guarantee the cooling effect of the gas, thereby stably achieving the cooling of the laser head 4.

[0033] The above description is only the preferred embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent substitutions or changes according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A laser engraving device for processing decorative wood, comprising a device base (1), a protective assembly, a dust extraction assembly, and a cooling assembly, characterized in that: The upper end of the device base (1) is fixedly provided with an engraving track (3) via a column (2). A laser head (4) is movably installed on the engraving track (3). A display (5) is fixedly installed on the side wall of the device base (1). Hydraulic fasteners (12) are provided on both sides of the upper end of the device base (1). A pressure plate (13) is fixedly installed at the lower end of the hydraulic fastener (12). A pressure sensor (14) is fixedly installed on the pressure plate (13). The protective assembly consists of a C-shaped enclosure (6) and a protective airbag (7), which are used to separate the device during carving and provide protection. The enclosure (6) has openings at the top and bottom and is fixed along the upper side edge of the device base (1). The protective airbag (7) is longitudinally elastically arranged inside the enclosure (6). A control mechanism for controlling the expansion and contraction of the protective airbag is installed on the side wall of the enclosure (6). The dust collection assembly consists of a dust collection head (15), a dust collection tube (16), a negative pressure tube (18), and a dust collection box (17), and is used to remove wood chips and dust generated during carving. The dust collection head (15) is fixedly arranged around the laser head (4), the dust collection tube (16) is connected between the dust collection head (15) and the dust collection box (17), and the negative pressure tube (18) is connected between the dust collection box (17) and the protective airbag (7). The cooling component consists of a liquid storage box (24) and an exhaust pipe (25), which is used to cool the laser head (4) by circulating cold air back to the dust suction head (15) after engraving. The liquid storage box (24) is fixed at the upper end of the dust storage box (17) and stores coolant. The exhaust pipe (25) is connected between the dust suction pipe (16) and the protective airbag (7). The exhaust pipe (25) is provided with a U-shaped structure (27) inside the liquid storage box (24). The U-shaped structure (27) is immersed in the coolant.

2. The laser engraving device for processing decorative wood according to claim 1, characterized in that: The control mechanism includes a reversible motor (9), a threaded rod (10), and a threaded sleeve (11). The reversible motor (9) is fixedly installed on the side wall of the enclosure (6) by a fixing plate (8). The threaded rod (10) is rotatably connected to the upper end of the fixing plate (8) and is coaxially fixedly connected to the output shaft of the reversible motor (9). The threaded sleeve (11) is threadedly connected to the threaded rod (10) and is fixedly connected to the upper end of the protective airbag (7). A guide mechanism is installed on the other side of the enclosure (6). The reversible motor (9) is electrically controlled to the pressure sensor (14).

3. The laser engraving device for processing decorative wood according to claim 2, characterized in that: The guiding mechanism includes a guide rod (21) and a guide sleeve (22). The guide rod (21) is fixedly installed on the side wall of the enclosure (6). The guide sleeve (22) is slidably connected to the guide rod (21) and fixedly connected to the upper end of the protective airbag (7). The guide sleeve (22) and the threaded sleeve (11) are fixedly connected by a connecting rod (23).

4. The laser engraving device for processing decorative wood according to claim 1, characterized in that: A first electrically controlled check valve (19) is installed at the connection between the suction pipe (16) and the dust collection box (17) to allow gas to flow from the suction pipe (16) to the dust collection box (17). A second electrically controlled check valve (20) is installed on the negative pressure pipe (18) to allow gas to flow from the dust collection box (17) to the protective airbag (7). Both the first electrically controlled check valve (19) and the second electrically controlled check valve (20) are electrically connected to the pressure sensor (14).

5. The laser engraving device for processing decorative wood according to claim 1, characterized in that: The exhaust pipe (25) is equipped with a third electrically controlled check valve (26) that allows gas to flow only from the protective airbag (7) to the suction pipe (16), and the electrically controlled check valve is electrically connected to the pressure sensor (14).

6. The laser engraving device for processing decorative wood according to claim 1, characterized in that: A dustproof net is installed at the connection between the negative pressure pipe (18) and the dust collection box (17).

7. The laser engraving device for processing decorative wood according to claim 1, characterized in that: The liquid storage box (24) is equipped with a cooling assembly, which consists of several copper heat sinks (28). The heat sinks (28) are fixedly connected by a strip plate (29). The strip plate (29) and the connecting rod (23) are fixedly connected by a bent rod (30).

8. The laser engraving device for processing decorative wood according to claim 1, characterized in that: The protective airbag (7) is made of high-strength elastic rubber material, and its inner wall is evenly distributed with several arc-shaped protrusions.

9. The laser engraving device for processing decorative wood according to claim 7, wherein the heat sink (28) is arranged in a wave-shaped structure and the spacing between two adjacent heat sinks (28) is 8-12mm.

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