Furniture laser engraving apparatus

Abstract

The present application relates to laser engraving machine technical field, specifically propose a kind of furniture laser engraving equipment, including the workbench of being equipped with fixing device, fixing device is used to place the material to be engraved and is fixed, the upper portion of workbench is equipped with movement control system for controlling the movement of laser head, the surface of movement control system is equipped with exhaust device and heat conduction device that can move with laser head, the inside of protective cover assembly is equipped with elastic rope for connecting heat conduction rod;The present application sets up heat conduction piece one, heat conduction piece two, heat conduction rod and semiconductor refrigeration sheet, when laser head accelerates and decelerates, the force generated by inertia will drive two sides heat conduction rod to move and be respectively in the surface of heat conduction piece one, the heat absorbed by heat conduction piece one surface will be transmitted by heat conduction rod instantaneously, thus there is stronger cooling in the stage of turning to neutralize the high temperature generated by longer residence time, to effectively reduce the incision or scorching of bending position, ensure the stability of processing engraving.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser engraving machines, and specifically discloses a furniture laser engraving device. BACKGROUND

[0002] Laser engraving is a process of using a high-energy-density laser beam to act on the surface of a material to cause physical or chemical changes in the material, thereby achieving engraving. The engraving material is different, and there are differences. For some low-melting-point and easy-vaporization materials, such as wood, plastic, and leather used to make furniture, when the laser beam is irradiated onto the surface of the material, the material absorbs the energy of the laser, causing the surface temperature to rise rapidly. Under the action of laser energy, the molecules on the surface of the material obtain enough energy to overcome the intermolecular bonding force, and directly change from solid to gas. Thus, part of the material on the surface is removed, thereby achieving the engraved pattern or text.

[0003] However, during the vaporization process, smoke, solid particles, and harmful gases are generated, so an air extraction device needs to be installed on the laser engraving bed for safety processing. However, the air extraction pipe is usually fixed at a certain position, making it difficult to accurately process the processing position, which may cause some harmful gases to overflow, affecting the health of the workers. In addition, if the smoke and solid particles pass through the laser during the dispersion process, they will cause refraction and reflection of the laser, affecting the effect of laser engraving. Moreover, when engraving the corner position, the laser head needs to go through the processes of deceleration, zero setting, reversing, and acceleration, which will cause the laser engraving time at this position to be longer, the heat to be higher, and the engraving marks to be deeper relative to the uniform speed position, thereby affecting the quality of the engraved furniture, especially the furniture with light color. SUMMARY

[0004] To solve the above problems, the present application provides a furniture laser engraving device to solve the problems mentioned in the background.

[0005] In order to achieve the above object, the present application adopts the following technical scheme: a furniture laser engraving device, comprising a workbench provided with a fixing device for placing materials to be engraved and fixing furniture plates, a motion control system for controlling the movement of a laser head is arranged above the workbench, an exhaust device and a heat conduction device capable of moving with the laser head are arranged on the surface of the motion control system; the heat conduction device comprises a heat conduction piece one and a protective cover assembly for mounting the heat conduction piece one, the surface of the protective cover assembly is provided with a laser hole for the laser to pass through, the side edge of the heat conduction piece one is provided with a movable heat conduction rod, the movement of the heat conduction rod is controlled by acceleration and deceleration of the laser head, so as to realize intermittent contact heat conduction between the heat conduction rod and the heat conduction piece one, the top of the heat conduction rod is provided with a heat conduction piece two, and the surface of the protective cover assembly is provided with a semiconductor refrigeration sheet in contact with the heat conduction piece two; the inside of the protective cover assembly is provided with an elastic rope for connecting the heat conduction rod.

[0006] Preferably, the heat conduction piece one and the heat conduction piece two are both arranged in an annular shape, the number of the heat conduction rods is two and they are symmetrically arranged on both sides of the heat conduction piece one, and the inner ring side and the outer ring side of the heat conduction piece two are both wrapped with a heat insulation sleeve for heat insulation; the surface of the heat conduction piece one is sleeved with an annular mounting disc, the heat conduction piece two movably penetrates the surface of the mounting disc, the heat conduction rod is arranged inside the mounting disc along the radius of the mounting disc, and an angle adjusting assembly is arranged between the mounting disc and the protective cover assembly for controlling the rotation angle of the mounting disc.

[0007] Preferably, the protective cover assembly comprises two circular protective shells, the mounting disc is arranged inside the bottom protective shell, the inside of the protective shell is provided with a stepped recess in communication with the outside, the surface of the mounting disc is provided with an integrally formed flange, and the mounting disc is arranged inside the recess.

[0008] Preferably, the angle adjusting assembly comprises a plurality of clamping grooves arranged in an annular array inside the recess, the surface of the mounting disc is provided with a telescopic clamping block in the shape of an isosceles trapezoid, the upper surface and the lower surface of the clamping block are also provided with inclined surfaces, and the shape of the inner wall of the clamping groove is matched with the shape of the clamping block; the surface of the mounting disc is provided with a mounting groove for mounting the clamping block, and the clamping block is mounted and fixed in the mounting groove by a spring.

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

[0010] Preferably, the exhaust device comprises a circular air passage groove opened in the inner part of the protective cover assembly, a plurality of air holes for communicating the outside air and the air passage groove are opened in the lower surface of the protective cover assembly, the upper surface of the protective cover assembly is equipped with an air pipe communicated with the air passage groove, the inner part of the air pipe is equipped with a filter core, the surface of the motion control system is equipped with a micro air pump communicated with the inner part of the air pipe.

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

[0012] Preferably, the adjusting assembly comprises a mounting rack for mounting the heat conduction device, the surface of the laser head is equipped with a rotatable threaded rod, and the end of the threaded rod is threaded through the mounting rack.

[0013] Preferably, the surface of one of the protective shells is equipped with an integrally formed external threaded pipe, and the surface of the other protective shell is provided with an internal threaded groove matched with the external threaded pipe.

[0014] Preferably, the bottom of the mounting disc is provided with a notch for increasing friction.

[0015] 1. The above technical solution has the following advantages or beneficial effects: the present application provides a furniture laser engraving equipment, by setting heat conduction piece one, heat conduction piece two, heat conduction rod and semiconductor refrigeration sheet, when the laser head accelerates and decelerates, the force generated by inertia will drive the two heat conduction rods to move and rest on the surface of the heat conduction piece one, the heat absorbed by the surface of the heat conduction piece one will be transmitted by the heat conduction rod instantly, so that strong cooling exists in the turning stage to neutralize the high temperature generated by long residence time, thereby effectively reducing the engraving or burning of 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 application provides a furniture laser engraving equipment, by setting a circular air hole, the laser of the laser head is circularly arranged, so that the smoke particles and toxic gases generated during processing can be sucked from the nearest air hole, and the smoke particles and gases passing through the engraving position of the laser are minimized, the stability during engraving is ensured, and the health of the workers is protected.

[0017] 3. The above technical solution has the following advantages or beneficial effects: the present application provides a furniture laser engraving equipment, by setting heat conduction rods and air holes, in the process of laser head processing, the heat conduction function of the heat conduction rods and the smoke exhaust function of the circularly arranged air holes are utilized, the stability and heat dissipation of the laser during processing are improved, and the quality of the laser engraving is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] The present application, its features, form and advantages will become better understood with reference to the following non-limiting embodiments described in detail with reference to the accompanying drawings in which like reference numerals refer to like elements throughout. The drawings are not intended to be drawn to scale. What is important is that the drawings demonstrate the principal of the present application.

[0019] Figure 1 is a perspective view of a furniture laser engraving device according to the present application.

[0020] Figure 2 is a perspective view of a part of the exhaust device.

[0021] Figure 3 is a perspective view of a part of the adjustment assembly.

[0022] Figure 4 is a top view of the heat conducting device.

[0023] Figure 5 is a bottom view of the heat conducting device.

[0024] Figure 6 is a front view of the heat conducting device.

[0025] Figure 7 is a bottom view of the protective shell.

[0026] Figure 8 is a perspective view of a part of the protective shell.

[0027] Figure 9 is a perspective view of the mounting disc.

[0028] Figure 10 is a front view of Figure 9 .

[0029] Figure 11 is a side view of Figure 9 .

[0030] In the drawings: 1, worktable; 2, laser head; 3, motion control system; 4, heat conducting part one; 5, laser hole; 6, heat conducting rod; 7, heat conducting part two; 8, semiconductor refrigeration sheet; 9, elastic rope; 10, mounting disc; 11, protective shell; 12, groove; 13, clamping slot; 14, clamping block; 15, flange; 16, mounting slot; 17, spring; 18, stud; 19, air passage; 20, air hole; 21, air pipe; 22, filter core; 23, micro air pump; 24, mounting frame; 25, threaded rod; 26, externally threaded pipe; 27, internally threaded slot. DETAILED DESCRIPTION

[0031] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0032] In order to enable the person skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0033] Figure 1 Disclosed is a furniture laser engraving device for engraving a pattern on the surface of furniture, including but not limited to wooden, plastic and leather furniture products, using the high temperature generated by laser to vaporize the surface of the furniture, thereby forming the pattern required by the consumer.

[0034] As Figure 1 shown, the furniture laser engraving device includes a workbench 1 provided with a fixing device, the furniture plate is placed on the surface of the workbench 1, the fixing device clamps and fixes the furniture plate to ensure correct engraving position, the fixing device can be selected from common fixing clamps or suction cup suction installation and fixation, a motion control system 3 capable of controlling the movement of the laser head 2 is assembled above the workbench 1, the motion control system 3 can control the laser head 2 to move in X, Y and Z three axes, an exhaust device and a heat conduction device capable of moving with the laser head 2 are assembled on the surface of the motion control system 3, which can accurately remove the smoke at the processing position and cool the position with high temperature.

[0035] As Figures 4-5 , Figures 7-8 and Figure 10 shown, two protective shells 11 distributed above and below are arranged below the laser head 2, an integrally formed external thread pipe 26 is assembled on the surface of the lower protective shell 11, an internal thread groove 27 adapted to the external thread pipe 26 is formed on the surface of the upper protective shell 11, the two protective shells 11 can be tightly installed and fixed by aligning the position of the external thread pipe 26 with the internal thread groove 27 during installation, and the same vertical position of the protective shell 11 is provided with a laser hole 5 for laser to pass through.

[0036] As Figures 6-8As shown, the heat conduction device includes annular heat conduction member one 4 and heat conduction member two 7, which are both assembled inside the protective shell 11. The lower position of the protective shell 11 is provided with a stepped recess 12 which is in communication with the outside. The mounting plate 10 is assembled at the position of the recess 12. The surface of the mounting plate 10 is provided with a mounting groove for assembling the heat conduction member one 4. The heat conduction member one 4 is directly placed inside the mounting groove. The surface of the mounting plate 10 is provided with an integrally formed flange 15 which is lapped on the stepped position of the recess 12. Two symmetrical movable heat conduction rods 6 are assembled inside the mounting plate 10 along the radial direction of the mounting plate 10. In order to ensure the stability of the movement of the heat conduction rods 6, balls can be arranged on the surface of the heat conduction rods 6 to reduce the friction when the heat conduction rods 6 move (see Figure 9 ). The elastic rope 9 is assembled between the heat conduction rods 6 and the mounting plate 10. The both ends of the elastic rope 9 are provided with studs 18 which are respectively screwed into the inside of the heat conduction rods 6 and the mounting plate 10 to facilitate the replacement of the elastic rope 9.

[0037] As shown in Figure 4 and Figures 6-8 , the heat conduction member two 7 movably penetrates the surface of the protective shell 11 and abuts against the upper surface of the heat conduction rod 6. In order to increase the contact area between the heat conduction member two 7 and the surface of the heat conduction rod 6, the top of the heat conduction rod 6 is provided with a flat surface to accelerate the heat transfer and thus improve the heat dissipation efficiency. A plurality of semiconductor refrigeration fins 8 are mounted on the top of the protective shell 11. The semiconductor refrigeration fins 8 are powered by a unified power supply which can be assembled on the protective shell 11 (not shown in the figure). The top of the heat conduction member two 7 abuts against the refrigeration side of the semiconductor refrigeration fin 8. A plurality of heat dissipation fins are assembled on the heat dissipation side of the semiconductor refrigeration fin 8 for improving the heat dissipation capacity. In the initial state, the two heat conduction rods 6 do not abut against the surface of the heat conduction member one 4.

[0038] Since high temperature is required for laser engraving, the influence of the heat conduction member two 7 on the heat conduction member one 4 needs to be reduced during normal engraving. Therefore, heat insulation sleeves for heat insulation are wrapped around the inner ring side and the outer ring side of the heat conduction member two 7, and only the top and the bottom thereof are used for heat conduction.

[0039] In the process of laser engraving, when a curved line needs to be engraved, the laser head 2 needs to slow down, reverse and accelerate, so compared with the area of uniform motion, the line when turning will be deeper or burned due to longer movement time, especially for light-colored furniture. When the motion control system 3 moves to drive the laser head 2 to move, the force generated by inertia will drive the two heat guide rods 6 to move respectively until they are completely against the surface of the heat guide part 4. At this time, the heat absorbed by the surface of the heat guide part 4 will be instantly transmitted by the heat guide rod 6, so there will be strong cooling in the turning stage to neutralize the high temperature generated by the long residence time, thereby effectively reducing the engraving or burning of the bending position. However, when the laser head 2 enters the state of uniform motion, the elastic rope 9 will pull the heat guide rod 6 back to the initial position due to the elastic force, so it will not affect the normal engraving.

[0040] However, due to the different angles of the bends in different patterns, in order to improve the stability of the movement of the heat guide rod 6, it is necessary to control the position of the heat guide rod 6 by assembling an angle adjusting assembly to ensure that it is consistent with the engraving angle, so that the force generated by inertia is applied to the heat guide rod 6 to the greatest extent.

[0041] As shown in Figure 8 and Figure 11 , the angle adjusting assembly includes a plurality of clamping grooves 13 arranged in a ring array inside the groove 12, and the surface of the mounting disc 10 is provided with a mounting groove 16 for mounting the clamping block 14. In this embodiment, the number of clamping blocks 14 is two and symmetrically installed, the inside of the mounting groove 16 is installed and fixed with the clamping block 14 by the spring 17, the clamping block 14 is set as an isosceles trapezoidal shape, the upper surface and the lower surface of the clamping block 14 are also set as inclined surfaces, and the inner wall shape of the clamping groove 13 is adapted to the shape of the clamping block 14. In this way, when the mounting groove 16 is rotated, the edge of the clamping groove 13 abuts against the surface of the clamping block 14 until it is extruded into the inside of the mounting groove 16. When moving to the position of the next clamping groove 13, the spring 17 extrudes the clamping block 14, so as to rotate the mounting disc 10, thereby realizing the rotation of the heat guide rod 6. In order to facilitate the rotation of the mounting disc 10, recesses (see Figure 5 ) for increasing friction are provided at the bottom of the mounting disc 10, and the staff can directly control the rotation of the mounting disc 10 through the recesses outside.

[0042] As shown in Figure 2 and Figure 4As shown, the lower surface of the protective shell 11 at the lower position is provided with a plurality of annular array air holes 20, which are arranged in a circle around the center of the laser hole 5. An annular air passage 19 is arranged inside the protective shell 11, the inside of the air passage 19 is in communication with the inside of the air hole 20, and the top protective shell 11 is equipped with an air pipe 21 in communication with the air passage 19. A filter element 22 is arranged inside the air pipe 21. The surface of the motion control system 3 is equipped with a micro air pump 23, which is in communication with the inside of the air pipe 21. A special soft tube for inhaling is connected at this position to compensate for the displacement of the protective shell 11 during movement.

[0043] Since a large amount of smoke particles and toxic gases are generated during engraving, which not only harms the health but also affects the stability of the laser, by arranging a plurality of annular air holes 20, the toxic gases and smoke particles can be inhaled from the nearest air hole 20, thereby minimizing the smoke particles and gases passing through the engraving position of the laser, and ensuring the stability during engraving.

[0044] As shown in the drawings, Figure 3 The surface of the upper protective shell 11 is equipped with a mounting bracket 24, and the surface of the laser head 2 is equipped with a rotatable threaded rod 25. The threaded rod 25 can rotate by itself but cannot produce longitudinal displacement. The end of the threaded rod 25 is threaded through the mounting bracket 24. The surface of the mounting bracket 24 is flat and tightly 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 application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0046] In the description of the present application, it should be understood that unless otherwise explicitly specified and limited, the terms "provided", "connected", "mounted", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] The preferred embodiments of the present application have been described. It is to be understood that the application is not limited to the above specific embodiments, and that devices and structures not described in detail should be understood to be implemented in the ordinary way in the art; any person skilled in the art can make many possible changes and modifications, or modify equivalent embodiments without departing from the technical solutions of the present application, which does not affect the essential content of the present application. Therefore, any simple modification, equivalent change and modification made to the above embodiments in accordance with the technical essence of the present application, without departing from the technical solutions of the present application, still belongs to the protection scope of the technical solutions of the present application.

Claims

1. A furniture laser engraving device, comprising a worktable equipped with a fixing device for placing the material to be engraved and fixing the furniture board, wherein a motion control system for controlling the movement of a laser head is mounted above the worktable, characterized in that: The surface of the motion control system is equipped with exhaust device and heat conduction device which can move with the laser head; The heat conduction device includes heat conduction part one and protective cover assembly for installing heat conduction part one, the surface of the protective cover assembly is provided with laser hole for laser passing, the side of the heat conduction part one is equipped with movable heat conduction rod, the movement of the heat conduction rod is controlled by acceleration and deceleration of the laser head, so as to realize intermittent contact heat conduction between the heat conduction rod and the heat conduction part one, the top of the heat conduction rod is equipped with heat conduction part two, the surface of the protective cover assembly is equipped with semiconductor refrigeration piece in contact with the heat conduction part two; The inside of the protective cover assembly is equipped with elastic rope for connecting the heat conduction rod.

2. The furniture laser engraving apparatus according to claim 1, wherein: The heat conduction part one and the heat conduction part two are both arranged in annular shape, the number of the heat conduction rods is two and they are symmetrically equipped on both sides of the heat conduction part one, the inner ring side and the outer ring side of the heat conduction part two are both wrapped with heat insulation sleeve for heat insulation; The surface of the heat conduction part one is sleeved with annular mounting disc, the heat conduction part two is movably penetrated through the surface of the mounting disc, the heat conduction rod is equipped inside the mounting disc along the radius of the mounting disc, the mounting disc and the protective cover assembly are equipped with angle adjusting assembly for controlling the rotation angle of the mounting disc.

3. A furniture laser engraving apparatus as claimed in claim 2, characterized in that: The protective cover assembly includes two circular protective shells, the mounting disc is equipped inside the protective shell at the bottom, the inside of the protective shell is provided with recess with step shape and communicating with the outside, the surface of the mounting disc is provided with integral flange, the mounting disc is equipped inside the recess.

4. A furniture laser engraving apparatus according to claim 3, characterized in that: The angle adjusting assembly includes a plurality of clamping grooves arranged in annular array and opened in the inside of the recess, the surface of the mounting disc is equipped with telescopic clamping block with isosceles trapezoidal shape, the upper surface and the lower surface of the clamping block are also provided with inclined surface, the shape of the inner wall of the clamping groove is matched with the shape of the clamping block; The surface of the mounting disc is provided with mounting groove for mounting the clamping block, the clamping block is mounted and fixed in the inside of the mounting groove by spring.

5. The furniture laser engraving apparatus according to claim 2, wherein: Both ends of the elastic rope are equipped with studs, the two studs are respectively threadedly inserted in the inside of the heat conduction rod and the mounting disc.

6. The furniture laser engraving apparatus according to claim 1, wherein: The exhaust device includes annular air passage groove opened in the inside of the protective cover assembly, the lower surface of the protective cover assembly is provided with a plurality of air holes for communicating outside air and the air passage groove, the plurality of air holes are arranged in annular array, the upper surface of the protective cover assembly is equipped with air pipe communicating with the air passage groove, the inside of the air pipe is equipped with filter element, the surface of the motion control system is equipped with micro air pump, the micro air pump communicates with the inside of the air pipe.

7. The furniture laser engraving apparatus according to claim 1, wherein: The surface of the laser head is provided with adjusting assembly for adjusting the distance between the heat conduction device and the laser head.

8. A furniture laser engraving apparatus according to claim 7, characterized in that: The adjusting assembly includes mounting frame for mounting and connecting the heat conduction device, the surface of the laser head is equipped with rotatable threaded rod, the end of the threaded rod is threadedly penetrated through the mounting frame.

9. The furniture laser engraving apparatus according to claim 3, wherein: The surface of one of the protective shells is equipped with integral external threaded pipe, the surface of the other protective shell is provided with internal threaded groove matched with the external threaded pipe.

10. The furniture laser engraving apparatus according to claim 3, wherein: The bottom of the mounting disc is provided with indentation for increasing friction.

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