Furniture laser engraving equipment

Abstract

The invention relates to the technical field of laser engraving machines, in particular to furniture laser engraving equipment which comprises a workbench provided with a fixing device, the fixing device is used for placing and fixing a to-be-engraved material, and a motion control system for controlling a laser head to move is assembled above the workbench. An exhaust device and a heat conduction device which can move along with the laser head are assembled on the surface of the motion control system, and an elastic rope used for being connected with a heat conduction rod is assembled in the protective cover assembly; the laser head is provided with the first heat conduction piece, the second heat conduction piece, the heat conduction rods and the semiconductor chilling plate, in the acceleration and deceleration process of the laser head, force generated by inertia drives the heat conduction rods on the two sides to move to abut against the surface of the first heat conduction piece, and heat absorbed by the surface of the first heat conduction piece is instantly transmitted by the heat conduction rods; therefore, in the turning stage, relatively strong cooling exists to neutralize high temperature generated by relatively long retention time, so that nicks or scorching at the bending position is effectively reduced, and the stability of processing and carving is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of laser engraving machines, and specifically provides a furniture laser engraving device. Background Art

[0002] Laser engraving is a process that uses a laser beam with a high energy density to act on the surface of a material, causing physical or chemical changes in the material to achieve engraving. It varies depending on the engraving material. For some materials with low melting points and easy to vaporize, such as wood, plastic, leather, etc. used to make furniture, when the laser beam irradiates the surface of the material, the material absorbs the energy of the laser, causing the surface temperature to rise rapidly. Under the action of the laser energy, the molecules on the surface of the material obtain sufficient energy to overcome the binding force between molecules and directly change from a solid state to a gaseous state. In this way, a part of the material is removed from the surface of the material, thus realizing the engraved pattern or text.

[0003] However, smoke, solid particles, and harmful gases are generated during the vaporization process. Therefore, an air extraction device needs to be installed on the laser engraving bed for safety treatment. However, the suction pipe is usually fixed in a certain position, making it difficult to accurately process the processing position, which may cause some harmful gases to overflow and affect the health of the staff. Moreover, if the smoke and solid particles pass through the laser during dispersion, they will also cause refraction and reflection of the laser, affecting the laser engraving effect. Additionally, when engraving at the corner position, due to the need for turning operations, the laser head needs to go through the processes of decelerating to zero, reversing, and accelerating, resulting in a longer laser engraving time and higher heat at this position. The engraving mark will be deeper compared to the uniform speed position, affecting the quality of the engraved furniture, especially for furniture with a lighter color. Summary of the Invention

[0004] To solve the above problems, the present invention provides a furniture laser engraving device for solving the problems mentioned in the above background art.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A furniture laser engraving device, including a workbench equipped with a fixing device for placing the material to be engraved and fixing the furniture board. Above the workbench, a motion control system for controlling the movement of the laser head is assembled, and an exhaust device and a heat conduction device that can move along with the laser head are assembled on the surface of the motion control system; the heat conduction device includes a first heat conduction member and a protective cover assembly for installing the first heat conduction member. A laser hole for the laser to pass through is provided on the surface of the protective cover assembly. A movable heat conduction rod is assembled on the side of the first heat conduction member, and the movement of the heat conduction rod is controlled by the acceleration and deceleration of the laser head, so as to realize the intermittent contact heat conduction between the heat conduction rod and the first heat conduction member. A second heat conduction member is assembled on the top of the heat conduction rod, and a semiconductor refrigeration sheet in contact with the second heat conduction member is assembled on the surface of the protective cover assembly; an elastic rope for connecting the heat conduction rod is assembled inside the protective cover assembly.

[0006] Preferably, both the first heat conduction member and the second heat conduction member are set in a ring shape, the number of the heat conduction rods is two and they are symmetrically assembled on both sides of the first heat conduction member, and heat insulation sleeves for heat insulation are wrapped on both the inner ring side and the outer ring side of the second heat conduction member; a ring-shaped mounting disc is sleeved on the surface of the first heat conduction member, the second heat conduction member movably penetrates the surface of the mounting disc, the heat conduction rod is assembled inside the mounting disc along the radius of the mounting disc, and an angle adjustment component is assembled between the mounting disc and the protective cover assembly for controlling the rotation angle of the mounting disc.

[0007] Preferably, the protective cover assembly includes two circular ring-shaped protective shells, the mounting disc is assembled inside the bottom protective shell, a stepped groove communicating with the outside is provided inside the protective shell, and a flange integrally formed is provided on the surface of the mounting disc, and the mounting disc is assembled inside the groove.

[0008] Preferably, the angle adjustment component includes a plurality of card slots opened inside the groove and arranged in a circular array, a retractable isosceles trapezoid-shaped block is assembled on the surface of the mounting disc, the upper surface and the lower surface of the block are also set as inclined surfaces, and the inner wall shape of the card slot is adapted to the shape of the block; an installation groove for installing the block is opened on the surface of the mounting disc, and the block is installed and fixed in the installation groove through a spring.

[0009] Preferably, studs are assembled at both ends of the elastic rope, and the two studs are respectively threadedly inserted into the heat conduction rod and the mounting disc.

[0010] Preferably, the exhaust device includes an annular ventilation groove formed inside the protective cover assembly. A plurality of ventilation holes for connecting external air and the ventilation groove are formed on the lower surface of the protective cover assembly. The plurality of ventilation holes are arranged in a circular array. A ventilation pipe communicating with the ventilation groove is assembled on the upper surface of the protective cover assembly. A filter element is assembled inside the ventilation pipe. A micro air pump is assembled on the surface of the motion control system. The micro air pump communicates with the inside of the ventilation pipe.

[0011] Preferably, an adjusting assembly for adjusting the distance between the heat conduction device and the laser head is formed on the surface of the laser head.

[0012] Preferably, the adjusting assembly includes a mounting bracket for mounting and connecting the heat conduction device. A rotatable threaded rod is assembled on the surface of the laser head. The end of the threaded rod threadedly penetrates through the mounting bracket.

[0013] Preferably, an integrally formed external threaded pipe is assembled on the surface of one of the protective shells, and an internal threaded groove adapted to the external threaded pipe is formed on the surface of the other protective shell.

[0014] Preferably, indentations for increasing friction are provided at the bottom of the mounting plate.

[0015] 1. The above technical solution has the following advantages or beneficial effects: The present invention provides a furniture laser engraving device. By setting the heat conduction member one, the heat conduction member two, the heat conduction rod and the semiconductor refrigeration sheet, when the laser head accelerates and decelerates, the force generated by inertia will drive the two heat conduction rods to move respectively and abut against the surface of the heat conduction member one. The heat absorbed by the surface of the heat conduction member one will be instantly transferred by the heat conduction rod. Therefore, there will be strong cooling in the turning stage to neutralize the high temperature generated during the long residence time, thereby effectively reducing the scratches or charring generated at the bending position and ensuring the stability of the processing and engraving.

[0016] 2. The above technical solution has the following advantages or beneficial effects: The present invention provides a furniture laser engraving device. By setting the annular ventilation holes in a circular shape with the laser of the laser head as the center, the smoke particles and toxic gases generated during processing can be inhaled from the ventilation holes closest to them, minimizing the smoke particles and gases passing through the engraving position of the laser as much as possible, ensuring the stability during engraving, and protecting the physical health of the staff.

[0017] 3. The above technical solution has the following advantages or beneficial effects: The present invention provides a furniture laser engraving device. By setting the heat conduction rod and the ventilation holes, during the processing of the laser head, the heat conduction function of the heat conduction rod and the smoke exhaust function of the annularly arranged ventilation holes are utilized to improve the stability and heat dissipation of the laser during the processing, thereby improving the quality of laser engraving. Description of the Drawings

[0018] The present invention, its features, shape, and advantages will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings. The same reference numerals indicate the same parts in all the drawings, and the drawings are not deliberately drawn to scale, with the emphasis on showing the gist of the present invention.

[0019] Figure 1 It is a schematic three-dimensional structure diagram of a furniture laser engraving device provided by the present invention.

[0020] Figure 2 It is a partial structure diagram of the position of the exhaust device.

[0021] Figure 3 It is a partial structure diagram of the position of the adjustment component.

[0022] Figure 4 It is a schematic top three-dimensional structure diagram of the heat conduction device.

[0023] Figure 5 It is a schematic bottom three-dimensional structure diagram of the heat conduction device.

[0024] Figure 6 It is a front sectional view of the heat conduction device.

[0025] Figure 7 It is a schematic bottom three-dimensional structure diagram of the protective housing at the top position.

[0026] Figure 8 It is a partial disassembled three-dimensional structure diagram of the protective housing at the bottom position.

[0027] Figure 9 It is a schematic three-dimensional structure diagram of the mounting plate.

[0028] Figure 10 It is Figure 9 The front sectional view of

[0029] Figure 11 It is Figure 9 The side sectional view of

[0030] In the figure: 1, workbench; 2, laser head; 3, motion control system; 4, first heat conduction member; 5, laser hole; 6, heat conduction rod; 7, second heat conduction member; 8, semiconductor refrigeration sheet; 9, elastic rope; 10, mounting plate; 11, protective housing; 12, groove; 13, card slot; 14, card block; 15, flange; 16, mounting groove; 17, spring; 18, stud; 19, ventilation groove; 20, ventilation hole; 21, ventilation pipe; 22, filter element; 23, micro air pump; 24, mounting bracket; 25, threaded rod; 26, external threaded pipe; 27, internal threaded groove. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] In order to enable those skilled in the art of this technology to better understand the solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Figure 1 A furniture laser engraving device is disclosed, which is used to engrave patterns on the surface of furniture, including but not limited to furniture products such as wood, plastic, and leather. The high temperature generated instantaneously by the laser vaporizes the surface of the furniture, thereby forming the patterns required by consumers.

[0034] As Figure 1 shown, the furniture laser engraving device includes a workbench 1 equipped with a fixing device. The furniture board is placed on the surface of the workbench 1, and the fixing device clamps and fixes the furniture board to ensure the correct engraving position. The fixing device can be selected from common fixing clips or suction cup adsorption methods for installation and fixation. Above the workbench 1, a motion control system 3 capable of controlling the movement of the laser head 2 is assembled. The motion control system 3 can control the laser head 2 to move in the X, Y, and Z axes. On the surface of the motion control system 3, an exhaust device and a heat conduction device that can move along with the laser head 2 are assembled to accurately remove the smoke at the processing position and cool down the positions with higher temperatures.

[0035] As Figures 4 - 5 、 Figures 7 - 8 and Figure 10 shown, two protective shells 11 are arranged up and down below the laser head 2. An integrally formed external threaded tube 26 is assembled on the surface of the lower protective shell 11, and an internal threaded groove 27 adapted to the external threaded tube 26 is provided on the surface of the upper protective shell 11. When installing, aligning the external threaded tube 26 with the position of the internal threaded groove 27 can tightly install and fix the two protective shells 11. A laser hole 5 for the laser to pass through is provided at the same vertical position of the protective shell 11.

[0036] As Figures 6 - 8As shown in the figure, the heat conduction device includes an annular heat conduction member 4 and a heat conduction member 7, both of which are assembled inside the protective shell 11. The protective shell 11 at the lower position is provided with a stepped groove 12 communicating with the outside. An installation disk 10 is assembled at the position of the groove 12. The surface of the installation disk 10 is provided with an installation groove for assembling the heat conduction member 4. The heat conduction member 4 is directly placed inside the installation groove. The surface of the installation disk 10 is provided with an integrally formed flange 15. The flange 15 is placed on the stepped position of the groove 12. Two symmetrically arranged movable heat conduction rods 6 are assembled inside the installation disk 10 and are assembled along the radial direction of the installation disk 10. To ensure the stability of the movement of the heat conduction rod 6, balls can be arranged on the surface of the heat conduction rod 6 to reduce the friction when the heat conduction rod 6 moves (refer to Figure 9 ). An elastic rope 9 is assembled between the heat conduction rod 6 and the installation disk 10. The two ends of the elastic rope 9 are provided with studs 18. The two studs 18 are respectively threadedly inserted into the heat conduction rod 6 and the installation disk 10 to facilitate the replacement of the elastic rope 9.

[0037] As Figure 4 and Figures 6 - 8 shown, the heat conduction member 7 movably penetrates the surface of the protective shell 11 and abuts against the upper surface of the heat conduction rod 6. To increase the contact area between the heat conduction member 7 and the surface of the heat conduction rod 6, the top of the heat conduction rod 6 is set as a plane to accelerate the heat transfer and thus improve the heat dissipation efficiency. A plurality of semiconductor refrigeration chips 8 are installed on the top protective shell 11 and are powered by a unified power supply and can be assembled on the protective shell 11 (not shown in the figure). The top of the heat conduction member 7 abuts against the refrigeration side of the semiconductor refrigeration chip 8. A plurality of heat dissipation fins are assembled on the heat dissipation side of the semiconductor refrigeration chip 8 to improve the heat dissipation capacity. In the initial state, neither of the two heat conduction rods 6 abuts against the surface of the heat conduction member 4.

[0038] Since laser engraving requires high temperature, during the normal engraving process, the influence of the heat conduction member 7 on the heat conduction member 4 needs to be reduced. Therefore, heat insulation sleeves for heat insulation are wrapped around both the inner ring side and the outer ring side of the heat conduction member 7, and only the top and bottom areas for heat conduction are reserved.

[0039] During the laser engraving process, when it is necessary to engrave a bent line, the laser head 2 needs to first decelerate to zero, reverse, and then accelerate. Therefore, compared with the area of uniform motion, the lines during turning will have deeper engraving marks or be burned due to the longer movement time. Especially for furniture with a lighter color, when the motion control system 3 drives the laser head 2 to move, the force generated by inertia will drive the two heat conduction rods 6 to move respectively until they completely abut against the surface of the first heat conduction member 4. At this time, the heat absorbed by the surface of the first heat conduction member 4 will be instantly transferred by the heat conduction rods 6. Therefore, there will be strong cooling during the turning stage to neutralize the high temperature generated by the longer residence time, thereby effectively reducing the engraving marks or burns at the bent position. However, when the laser head 2 enters the state of uniform motion, the elastic rope 9 will pull the heat conduction rod 6 back to its original position due to the elastic force, thus not affecting the normal engraving marks.

[0040] However, since the bending angles in different patterns are different, in order to improve the stability of the movement of the heat conduction rod 6, it is necessary to control the position of the heat conduction rod 6 by assembling an angle adjustment component to ensure that it is consistent with the engraving mark angle, so that the force generated by inertia can be applied to the heat conduction rod 6 to the greatest extent.

[0041] As Figure 8 and Figure 11 shown, the angle adjustment component includes a plurality of card slots 13 that are opened inside the groove 12 and are arranged in a circular array. The surface of the mounting disk 10 is provided with a mounting groove 16 for mounting the card block 14. In this embodiment, the number of card blocks 14 is set to two and they are symmetrically installed. The card block 14 is installed and fixed in the mounting groove 16 through a spring 17. The card block 14 is set in the shape of an isosceles trapezoid, and the upper surface and the lower surface of the card block 14 are also set as inclined surfaces. The inner wall shape of the card slot 13 is adapted to the shape of the card block 14. In this way, when the mounting groove 16 is rotated, the edge of the card slot 13 abuts against the surface of the card block 14 until it is squeezed into the mounting groove 16. When it moves to the position of the next card slot 13, the spring 17 squeezes out the card block 14, thereby rotating the mounting disk 10, so as to realize the rotation of the heat conduction rod 6. To facilitate the rotation of the mounting disk 10, a dent for increasing friction is provided at the bottom of the mounting disk 10 (see Figure 5 ). The staff can directly control the rotation of the mounting disk 10 through the dent outside.

[0042] As Figure 2 and Figure 4As shown in the figure, a plurality of annular-array ventilation holes 20 are formed in the lower surface of the protective shell 11 at the lower position, which are arranged in a circle with the center of the laser hole 5. An annular ventilation groove 19 is arranged inside the protective shell 11, and the inside of the ventilation groove 19 is communicated with the inside of the ventilation holes 20. A ventilation pipe 21 communicated with the ventilation groove 19 is assembled on the protective shell 11 at the top. A filter element 22 is assembled inside the ventilation pipe 21. A micro air pump 23 is assembled on the surface of the motion control system 3. The micro air pump 23 is communicated with the inside of the ventilation pipe 21. A special hose for suction is connected at this position to compensate for the displacement generated when the protective shell 11 moves.

[0043] During the engraving process, a large amount of smoke particles and toxic gases will be generated, which not only endanger physical health but also affect the stability of the laser. Therefore, by arranging a plurality of annular ventilation holes 20, the toxic gases and smoke particles can be inhaled from the nearest ventilation holes 20, and the smoke particles and gases passing through the engraving position of the laser are reduced as much as possible to ensure the stability during engraving.

[0044] As Figure 3 shown in the figure, a mounting bracket 24 is assembled on the surface of the upper protective shell 11, and a rotatable threaded rod 25 is assembled on the surface of the laser head 2. The threaded rod 25 can rotate by itself but will not generate longitudinal displacement. The end of the threaded rod 25 passes through the mounting bracket 24 in a threaded manner. The surface of the mounting bracket 24 is flat and closely attached to the surface of the laser head 2. Therefore, by rotating the threaded rod 25, the position of the protective shell 11 can be controlled to adapt to furniture boards of different thicknesses.

[0045] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0046] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "connected", "installed", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0047] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and the devices and structures not described in detail therein should be understood to be implemented in a common manner in the art; any person skilled in the art can make many possible changes and modifications without departing from the technical solution of the present invention, or modify it into equivalent embodiments with equivalent changes, which does not affect the essence of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A furniture laser engraving device, comprising a workbench equipped with a fixing device, the fixing device is used to place the material to be engraved and fix the furniture plate, and a motion control system for controlling the movement of the laser head is installed above the workbench, characterized in that: The surface of the motion control system is equipped with an exhaust device and a heat conduction device that can move with the laser head; The heat conduction device comprises a heat conduction member 1 and a protective cover assembly for mounting the heat conduction member 1, a laser hole for laser to pass through is provided on the surface of the protective cover assembly, a movable heat conduction rod is installed on the side of the heat conduction member 1, the movement of the heat conduction rod is controlled by the acceleration and deceleration of the laser head, so as to achieve intermittent contact heat conduction between the heat conduction rod and the heat conduction member 1, a heat conduction member 2 is installed on the top of the heat conduction rod, and a semiconductor cooling sheet in contact with the heat conduction member 2 is installed on the surface of the protective cover assembly; The interior of the protective cover assembly is equipped with an elastic rope for connecting the heat-conducting rod.

2. The furniture laser engraving device according to claim 1, characterized in that: The heat conducting member 1 and the heat conducting member 2 are both arranged in an annular shape, the number of the heat conducting rods is arranged in two and they are symmetrically assembled on both sides of the heat conducting member 1, and the inner ring side and the outer ring side of the heat conducting member 2 are both wrapped with a heat insulating sleeve for heat insulation; The surface of the heat conductive component 1 is sleeved with an annular mounting plate, the heat conductive component 2 movably penetrates the surface of the mounting plate, the heat conductive rod is installed inside the mounting plate along the radius of the mounting plate, and an angle adjustment component is installed between the mounting plate and the protective cover component for controlling the rotation angle of the mounting plate.

3. The furniture laser engraving device according to claim 2, characterized in that: The protective cover assembly includes two annular protective shells, the mounting plate is assembled inside the bottom protective shell, the interior of the protective shell is provided with a stepped groove connected to the outside, the surface of the mounting plate is provided with an integrally formed flange, and the mounting plate is assembled inside the groove.

4. The furniture laser engraving device according to claim 3, characterized in that: The angle adjustment assembly includes a plurality of card slots opened inside the groove and arranged in an annular array. The surface of the mounting plate is equipped with a retractable card block in the shape of an isosceles trapezoid. The upper and lower surfaces of the card block are also arranged as inclined surfaces. The inner wall shape of the card slot is adapted to the shape of the card block. The surface of the mounting plate is provided with a mounting groove for mounting a card block, and the card block is mounted and fixed inside the mounting groove by a spring.

5. The furniture laser engraving device according to claim 2, characterized in that: Both ends of the elastic rope are equipped with studs, and the two studs are respectively threadedly inserted into the inside of the heat conducting rod and the mounting plate.

6. The furniture laser engraving device according to claim 1, characterized in that: The exhaust device includes an annular ventilation groove opened inside the protective cover assembly, and the lower surface of the protective cover assembly is provided with a plurality of ventilation holes for connecting the external air and the ventilation groove. The plurality of ventilation holes are arranged in a circular array, and the upper surface of the protective cover assembly is equipped with a ventilation pipe connected to the ventilation groove, and the interior of the ventilation pipe is equipped with a filter element. The surface of the motion control system is equipped with a micro air pump, and the micro air pump is connected to the interior of the ventilation pipe.

7. The furniture laser engraving device according to claim 1, characterized in that: An adjusting component for adjusting the distance between the heat conducting device and the laser head is provided on the surface of the laser head.

8. The furniture laser engraving device according to claim 7, characterized in that: The adjustment assembly comprises a mounting frame for mounting and connecting the heat-conducting device, and a rotatable threaded rod is mounted on the surface of the laser head, and the end of the threaded rod is threadedly penetrated through the mounting frame.

9. The furniture laser engraving device according to claim 3, characterized in that: The surface of one of the protective shells is equipped with an integrally formed external threaded tube, and the surface of the other protective shell is provided with an internal threaded groove adapted to the external threaded tube.

10. The furniture laser engraving device according to claim 3, characterized in that: The bottom of the mounting plate is provided with indentations for increasing friction.

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