Heat sink for laser engraving head and method of mounting the same

Abstract

The application discloses a heat dissipation device for a laser engraving head and a mounting method thereof. The heat dissipation device for the laser engraving head comprises a shell which is in a cubic structure and has a through air duct at both ends, wherein a cavity is formed in one side of the shell, and an inner cover plate and an outer cover plate are detachably arranged in the cavity from inside to outside; a nozzle is fixed to one end of the shell and is in through connection with an internal part of the end of the shell and an external air pump; a fan is fixed to the other end of the shell and is used for discharging hot air in the cavity through the air duct formed in the end of the shell; and a light shield cover is arranged on the outer side of the shell and is close to one end of the heat dissipation nozzle. Through the improvement on the structure of the heat dissipation device and the mounting method thereof, the heat dissipation effect of the heat dissipation device is enhanced, and meanwhile, the convenience of mounting and dismounting of the heat dissipation device is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser engraving equipment, in particular to a heat dissipation device for a laser engraving head and a mounting method thereof. BACKGROUND

[0002] The working principle of the laser engraving head is mainly to use the heat energy of the laser to make the processed material melt and gasify instantaneously under the laser irradiation, so as to achieve the purpose of processing. Therefore, heat, dust and smoke gas will be generated during the working process of the laser engraving head. If the heat, dust and smoke gas cannot be dissipated and purified in time, the equipment itself and the processed material will be damaged, and the cutting effect will be reduced. Especially, the circuit structure of the laser engraving machine may be damaged or even cause a safety accident due to improper heat dissipation during high-temperature operation. In the prior art, a protective cover and a fan are usually arranged on the laser engraving head, and the airflow blown by the fan is used to achieve the purpose of cooling. However, the power and airflow of the fan are limited, and the fan itself will also generate heat if the power is too large. In actual use, the cooling effect is not ideal. SUMMARY

[0003] The purpose of the present application is to overcome the shortcomings of the prior art, and to provide a heat dissipation device for a laser engraving head and a mounting method thereof. Through the improvement of the structure of the heat dissipation device and the mounting method thereof, the heat dissipation effect of the heat dissipation device is enhanced, and the convenience of mounting and dismounting the heat dissipation device is also effectively improved.

[0004] To achieve the above-mentioned purpose, on the one hand, the technical scheme adopted by the present application is as follows: a heat dissipation device for a laser engraving head, comprising: a shell, the shell is a cuboid structure, a wind channel is opened through both ends, and a cavity is opened in one side face towards the inside, an inner cover plate and an outer cover plate are arranged in the cavity in sequence from inside to outside; a nozzle is fixed to one end of the shell and connected with an external air pump through the inside of the end of the shell, which is used to blow away the dust and smoke generated during the working process of the laser engraving head; a fan is fixed to the other end of the shell, and hot air in the cavity is discharged through the wind channel opened in the end of the shell; and a light shield cover is arranged on the outer side face of the shell close to one end of the nozzle, and the length of the light shield cover is less than the length of the shell.

[0005] The light shield cover is arranged as a cuboid frame structure composed of four plate faces connected in sequence, and one plate face far away from the opening of the cavity is inwardly recessed relative to the other three plate faces to form a gap.

[0006] A slide is opened on one of the plate faces of the light shield cover, and a locking device passes through the slide to make the light shield cover elongate or shorten relative to the shell in the direction of the nozzle.

[0007] The slide comprises a first slide and a second slide, wherein the hand-tightened locking nut and the variable-diameter sleeve are used to lock the light shield in a fixed position of the shell.

[0008] The nozzle is connected to the air pump outside the shell through a pneumatic quick connector passing through the second slide.

[0009] When the outer cover plate is fixed at the cavity opening, it is coplanar with the outer side of the shell, and the inner cover plate is arranged inside the cavity.

[0010] The inner cover plate divides the cavity into an upper space and a lower space in the direction of the nozzle, wherein the upper space above the inner cover plate near the outer cover plate is connected with the air ducts at both ends of the shell to form a ventilation cavity, and the lower space below the inner cover plate is a sealed space.

[0011] A PCB connecting plate is fixed between the fan and the shell, and a drive PCB plate and an organic glass baffle are fixed in sequence at the end of the fan opposite to the shell through an insulating sleeve, and are assembled and fixed into one body with the shell through screws.

[0012] To achieve the above-mentioned purpose, on the other hand, the technical solution adopted by the present application is: a mounting method of a laser engraving head heat dissipation device, which is used to mount the parts of the laser engraving head inside the heat dissipation device for the laser engraving head as described in the first aspect above, comprising the following steps:

[0013] The parts of the laser engraving head are fixed and arranged in the cavity of the shell, and the inner cover plate is fixed in the cavity so that the parts of the laser engraving head are sealed inside the cavity.

[0014] The nozzle at one end of the shell is connected to the external air pump through a pneumatic quick connector, so that the air pump drives the nozzle to blow away the dust and smoke generated during the operation of the laser engraving head.

[0015] The fan is fixed at the air outlet of the air duct at one end of the shell, so that the rotation of the fan drives the air in the air duct to flow and discharge heat.

[0016] The light shield is assembled at one end of the shell outside the nozzle.

[0017] The mounting method of the laser engraving head heat dissipation device uses a hand-tightened locking nut and a variable-diameter sleeve to adjustably lock the light shield in a fixed position on the outer side of the shell.

[0018] The present application has the following advantages:

[0019] 1. The heat dissipation device for laser engraving heads of the present invention has a cavity inside the housing for arranging and installing the components of the laser engraving head, so that the internal heat generated during the operation of the laser engraving head can be directly conducted to the entire heat dissipation device, which in particular improves the heat conduction rate of the housing. At the same time, the cavity structure facilitates installation and disassembly. When debugging the internal circuit, only the cavity cover plate needs to be opened for maintenance and debugging, making the maintenance process of the laser engraving machine more convenient and simple.

[0020] 2. The heat dissipation device for the laser engraving head of this invention is equipped with nozzles and fans at both ends to improve the heat dissipation effect. The fan and the air duct inside the housing are connected to the entire heat dissipation device to improve the air volume and heat dissipation efficiency of the fan. The nozzles can blow away the dust and smoke generated during the operation of the laser engraving head in real time to improve the cutting efficiency.

[0021] 3. The heat dissipation device of the laser engraving head of the present invention is equipped with a light shield on the outside, which can solve the problem of laser glare generated during the operation of the laser engraving head. In particular, the light shield of the present invention is provided with a first slide and a second slide, which can adjust the height of the light shield and adapt to two focal lengths during the operation. [Attached Image Description]

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the technical solutions involved in the embodiments will be briefly described below with reference to the accompanying drawings. Obviously, the drawings described in this specification are only some possible embodiments of the present invention. For those skilled in the art, other drawings that are the same as or similar to the technical solutions of the present invention can be obtained based on the following drawings without any creative effort.

[0023] Appendix Figure 1 This is a schematic diagram of the heat dissipation device for the laser engraving head of the present invention;

[0024] Appendix Figure 2 yes Figure 1 Schematic diagram of the AA section;

[0025] Appendix Figure 3 This is an exploded view of the heat dissipation device for the laser engraving head of the present invention;

[0026] Appendix Figure 4 This is a schematic diagram of the light shield structure of the heat dissipation device for the laser engraving head of the present invention;

[0027] Appendix Figure 5 This is a front view of the heat dissipation device for a laser engraving head according to the present invention from the nozzle direction.

[0028] 1. shell, 11. air duct, 12. cavity, 121. upper space, 122. lower space, 13. inner cover plate, 14. outer cover plate, 2. nozzle, 21. pneumatic quick connector, 3. fan, 4. shade, 41. clearance, 42. first slide, 43. second slide, 44. hand-tight locking nut, 45. reducing sleeve, 5. PCB connecting plate, 6. driving PCB, 7. organic glass baffle, 8. insulating sleeve, 9. screw. DETAILED DESCRIPTION

[0029] The technical solutions described in the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the embodiments described in the specification are only a part of the feasible technical solutions of the present application, and other embodiments obtained by those skilled in the art based on the embodiments of the present application without any creative labor should be considered as falling within the scope of protection of the present application.

[0030] It should be noted that the "first", "second", etc. used in the embodiments of the present application are only for the purpose of description, and should not be understood as indicating or implying the number of technical features defined. Therefore, the features defined as "first" and "second" in each embodiment of the specification can indicate that there are at least one of the technical features defined.

[0031] The technical solutions of each embodiment of the present application described in the specification can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it. When the combination of technical solutions appears to be contradictory or unachievable, it should be considered that the combination of technical solutions does not exist.

[0032] The heat dissipation device for the laser engraving head is applied to the laser engraving machine in practice and assembled with the laser engraving head. Specifically, the optical parts, control circuit components, etc. of the laser engraving head are assembled together, which is used for cooling the heat generated during the working process of the laser engraving head, and blowing away the dust and smoke gas generated during the working process of the laser engraving head. The main purpose of the present application is to improve the heat dissipation efficiency of the heat dissipation device, so as to achieve better heat dissipation and cooling effect. At the same time, considering the installation efficiency of the device structure, the structure of the heat dissipation device shell and the assembly mode between the heat dissipation device shell and the laser engraving head are improved, so that the use of the heat dissipation device not only can effectively improve the heat dissipation effect, but also is convenient for debugging, maintaining, repairing and other operations of the internal circuit of the laser engraving head. For details, please refer to the accompanying drawings. Figures 1-3The structure diagram of the heat dissipation device of the laser engraving head is shown, the heat dissipation device comprises a shell 1, a nozzle 2, a fan 3 and a light shield 4, wherein the shell 1 is a cubic structure, through holes 11 are formed at both ends, one side is internally provided with a cavity 12, and the cavity opening is provided with an inner cover plate 13 and an outer cover plate 14 from inside to outside. It should be noted that the cubic structure is formed by aluminum profile extrusion, which can be a cuboid structure, a square structure or an irregular structure similar to a cuboid or a square. The embodiment of the present application takes the cuboid structure of the shell shown in the drawings as an example to describe the technical scheme of the present application, and other structures are similar to this and will not be described in detail. The through holes 11 are formed at both ends of the shell 1, and the specific structure will be described below with reference to the drawings Figure 1 As shown, preferably, the two opposite faces with the smallest surface area in the cuboid structure are selected as the two ends of the shell 1, and the through holes 11 form a straight channel from one end of the shell 1 to the other end, preferably, in actual application, the through holes 11 are formed at the four long edges of the cuboid structure as shown in the drawings, and four through holes 11 are formed in the shell 1, which helps to improve the heat conduction efficiency of the shell 1 and better achieve the heat dissipation effect. Figure 1 As shown, preferably, the two opposite faces with the smallest surface area in the cuboid structure are selected as the two ends of the shell 1, and the through holes 11 form a straight channel from one end of the shell 1 to the other end, preferably, in actual application, the through holes 11 are formed at the four long edges of the cuboid structure as shown in the drawings, and four through holes 11 are formed in the shell 1, which helps to improve the heat conduction efficiency of the shell 1 and better achieve the heat dissipation effect. Figure 2 and 3As shown, a cuboid recess is opened inwardly in the middle section of the shell 1 to form a cavity 12, which can be provided with a flat surface or a fixing structure for fixing and assembling optical components of the laser engraving head, including but not limited to a buckle structure, a locking structure, a threaded binding structure, a fastening device, etc. The shell 1 is fixed with a mechanism fan 3 for actively dispersing gas outside the shell 1 and a nozzle 2 for blowing away dust and smoke generated during the working process of the laser engraving head. The nozzle 2 is fixed to one end of the shell 1, the nozzle outlet direction is consistent with the air outlet direction of the air duct 11, and the nozzle 2 is connected to the air pump through the L-shaped ventilation duct formed inside the shell 1 to blow out gas for dispersing and blowing away the dust and smoke gas generated during the working of the laser engraving head. In practical application, the inlet of the nozzle 2 is connected to the external air pump, and the outlet is connected to the outside of the shell 1. Under the driving of the air pump, the nozzle 2 blows out gas to disperse and blow away the dust and smoke gas generated during the working of the laser engraving head, achieving the effect of real-time purifying the working environment of the laser engraving head. The shell 1 is fixed with the fan 3 at the other end. When the heat dissipation device works, the air flow generated by the rotation of the fan 3 can drive the air circulation in the air duct 11, so as to discharge the hot air in the cavity 12 through the air duct 11 opened at the end of the shell 1. The light shield 4 is arranged on the outer side of the shell 1 close to one end of the nozzle 2, and the length of the light shield 4 is less than the length of the shell 1. The light shield 4 solves the problem that the laser generated during the working of the laser engraving head will be dazzling, so in practice, the light shield 4 is usually made of dark transparent structure of engineering plastic, preferably dark red transparent structure, and the length of the light shield 4 is less than the length of the shell 1 but greater than half the length of the shell 1.

[0033] Referring to the accompanying drawings Figure 4 As shown in the structure diagram of the light shield 4, the light shield 4 is arranged as a cuboid frame structure composed of four flat panels connected in sequence, and when the light shield 4 is completely covered outside the shell 1, the inner wall of the cuboid frame structure is completely attached to the outer wall of the shell 1. One of the four flat panels of the light shield 4 is inwardly recessed relative to the other three flat panels to form a recess 41. After the recess 41 is completely covered on the shell 1, one side part or the whole of the recess 41 covers the opening of the cavity 12.

[0034] In the embodiments of the specification of the present application, the terms "up", "down", "left", "right", "in", "out", "front", "back", etc. are relative to the direction of the drawings Figure 1As shown by example, the opening direction of the cavity 12 is "up", the opposite direction is "down", the protruding direction of the nozzle 2 is "left", which is also the actual working direction of the nozzle, the opposite direction is "right", which is the mounting direction of the fan 3 on the shell 1, the internal space of the cavity 12 is "in", and the outside of the shell 1 is "out". Through the above definition of the direction, as shown in the attached Figure 1 As shown, one of the flat panels of the light shield 4 is provided with a sliding channel, and the flat panel is the front flat panel of the light shield 4. The sliding channel is passed through by the locking device to make the light shield 4 extend or shorten in the direction of the nozzle 2 of the shell 1. In practice, the locking device includes but is not limited to locking mechanism, limiting mechanism, spring type pressing buckle, locking nut and other mechanisms or parts for limiting the light shield 4 at a specific position on the shell 1.

[0035] In a preferred embodiment, referring to the attached Figures 1-5 The sliding channel on the light shield 4 includes a first sliding channel 42 and a second sliding channel 43, which are arranged in parallel and can be adjusted up and down to adapt to the different focal length requirements of the laser engraving head in the engraving and cutting operation. The first sliding channel 42 or the second sliding channel 43 is passed through the hand-tightening locking nut 44 and the variable-diameter sleeve 45 to lock the light shield 4 at a fixed position of the shell 1. The hand-tightening locking nut 44 and the variable-diameter sleeve 45 are used together. In practice, the outer teeth can be M5 and the inner teeth can be M3. The M5 thread of the limiting step is used as an adapter variable-diameter sleeve to penetrate from the inside of the shell 1 to the front outside of the shell 1, and is matched with the hand-tightening locking nut 44 on the front outside of the shell 1. In order to prevent the light shield 4 from moving relative to the shell 1 and causing the thread to loosen, the variable-diameter sleeve 45 is locked in the shell 1 by a nut and is applied with thread glue.

[0036] In a feasible embodiment, in order to dissipate the dust and smoke gas generated by the laser engraving head in real time, the nozzle 2 is driven by an external driving device to spray. Specifically, referring to the attached Figure 1 and the attached Figure 5 As shown, the nozzle 2 is connected to the gas pump or other driving device capable of providing driving force for the nozzle 2 to spray through the pneumatic quick connector 21 penetrating the front side of the shell 1. In order to facilitate installation, the pneumatic quick connector 21 penetrates the second sliding channel 43. That is, when multiple sliding channels are provided on the light shield 4, at least one sliding channel should be parallel to the nozzle 2, so that the sliding channel can provide a gap to make the pneumatic quick connector 21 communicate with the nozzle 2 from the inside of the shell 1 to the outside of the shell 1.

[0037] Referring to the attached Figure 2 and the attached Figure 3Two cover plates are spaced apart at the opening of the cavity 12 inside the housing 1. When the outer cover plate 14 is fixed to the opening of the cavity 12, it is coplanar with the outer surface of the housing 1. The inner cover plate 13 is installed inside the cavity 12 to provide a sealing function. See attached diagram for details. Figure 2 The cross-sectional diagram shown illustrates that the inner cover plate 13 divides the internal space of the cavity 12 into upper and lower parts, separated by the ejection direction of the nozzle 2. These include an upper space 121 above the inner cover plate 13 and closer to the outer cover plate 14, and a lower space 122 below the inner cover plate 13. The upper space 121 communicates with the air ducts 11 at both ends of the housing 1 to form a ventilation cavity, but does not need to be connected to the nozzle 2. The lower space 122 is a completely sealed space, providing sealing protection for the components of the laser engraving head. In actual operation, the nozzle 2, driven by power, continuously ejects gas to disperse the dust and smoke generated during the laser engraving head's operation, thus protecting the working components of the laser engraving head and simultaneously purifying the working environment to improve cutting efficiency.

[0038] See attached document Figure 3 A PCB connecting board 5 is fixed between the fan 3 and the housing 1. In actual assembly, the PCB connecting board 5 can be fixed between the upper and lower air ducts 11. Being close to the fan 3 and the air ducts 11 can also directly dissipate heat and cool the PCB connecting board 5. At the end of the fan 3 opposite to the housing 1, a drive PCB board 6 and an acrylic baffle 7 are sequentially fixed via an insulating sleeve 8, and then assembled and fixed to the housing 1 as a single unit using screws 9. (Appendix) Figure 5 As shown, the fan 3 can simultaneously sweep through all the air ducts 11 inside the housing 1, thereby causing the rotation of the fan 3 to drive the air flow in all the air ducts 11 inside the housing 1 and thus expel the heat inside the housing 1.

[0039] Based on the above-described embodiments of the heat dissipation device for laser engraving heads, this invention also claims protection for an installation method of the heat dissipation device for laser engraving heads, used to install the components and control circuit of the laser engraving head inside the heat dissipation device for laser engraving heads described in the above embodiments, specifically including the following steps:

[0040] The optical components of the laser engraving head are fixedly arranged in the cavity 12 inside the housing 1, and the inner cover plate 13 is fixed in the cavity so that the optical components of the laser engraving head are sealed inside the cavity 12. Specifically, when the inner cover plate 13 and the outer cover plate 14 of the housing 1 divide the cavity 12 into an upper space 121 and a lower space 122, in order to strengthen the protection of the optical components of the laser engraving head, they are installed and fixed in the completely sealed lower space 122.

[0041] The nozzle 2 at one end of the shell 1 is communicated with an external air pump through the pneumatic quick connector 21, so that the air pump drives the nozzle 2 to spray air and blow away the dust and smoke generated by the laser engraving head;

[0042] The fan 3 is fixed at the air outlet of the air duct 11 at one end of the shell 1, so that the rotation of the fan 3 drives the air flow in all the air ducts 11 in the shell 1 to discharge heat;

[0043] The light shield 4 is assembled on the outside of the shell 1 near the nozzle 2, and is used to isolate the laser generated by the laser engraving head when the laser engraving head works. Preferably, the light shield 4 is locked in a fixed position on the outside of the shell with adjustable height by using a hand-tightening locking nut 44 and a variable-diameter sleeve 45. In practice, since multiple slides are arranged on the light shield 4, the height of the light shield 4 can be adjusted up and down by changing the position of the hand-tightening locking nut 44 and the variable-diameter sleeve 45 in the slides, so as to adapt to the focal length of the laser engraving head in different states of engraving and cutting, and thus achieve a better light shielding effect.

[0044] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the method of the present application, a number of improvements and supplements can also be made, and these improvements and supplements should also be considered as the protection scope of the present application.

Claims

1. A heat dissipating device for a laser engraving head, characterized in that, The utility model relates to a laser engraving machine, comprising: a housing in a cuboid structure with air ducts through both ends, wherein one side is provided with a cavity facing the inside, and the opening of the cavity is provided with an inner cover plate and an outer cover plate which can be detachably arranged from inside to outside in sequence; a nozzle fixed to one end of the housing and connected with an external air pump through the air duct inside the end of the housing for blowing away dust and smoke generated during the operation of the laser engraving head; a fan fixed to the other end of the housing to exhaust the hot air in the cavity through the air duct at the end of the housing; and a light shield cover arranged on the outer side of the housing close to the nozzle, and the length of the light shield cover is less than the length of the housing. When the outer cover plate is fixed to the opening of the cavity, it is coplanar with the outer side of the housing, and the inner cover plate is arranged inside the cavity.

2. The heat dissipating device for a laser engraving head according to claim 1, characterized in that, The inner cover plate divides the cavity into two layers of space in the direction of the nozzle, wherein the upper layer of space above the inner cover plate close to the outer cover plate is connected with the air ducts at both ends of the housing to form a ventilation cavity, and the lower layer of space below the inner cover plate is a sealed space for fixing and mounting the parts of the laser engraving head.

3. The heat dissipating device for a laser engraving head according to claim 2, characterized in that, The light shield cover is arranged in a cuboid frame structure composed of four plane panels connected in sequence, wherein one plane panel away from the opening of the cavity is inwardly recessed relative to the other three plane panels to form a recess.

4. The heat dissipating device for a laser engraving head according to claim 3, characterized in that, One of the plane panels of the light shield cover is provided with a slide, and the light shield cover is elongated or shortened relative to the housing in the direction of the nozzle by passing through the slide with a locking device.

5. The heat dissipating device for a laser engraving head according to claim 4, characterized in that, The slide includes a first slide and a second slide, wherein the first slide or the second slide passes through a hand-tightening locking nut and a variable-diameter sleeve to lock the light shield cover in a fixed position on the housing.

6. The heat dissipating device for a laser-engraving head according to claim 1, wherein The nozzle is connected with the air pump outside the housing through a pneumatic quick connector, and the pneumatic quick connector passes through the second slide.

7. A mounting method of a heat dissipation device for a laser engraving head, for mounting components of a laser engraving head inside the heat dissipation device for a laser engraving head according to any one of claims 1 to 6, characterized in that, A PCB connecting plate is fixed between the fan and the housing, and a driving PCB plate and an organic glass baffle are fixed in sequence on the end of the fan opposite to the housing through an insulating sleeve, and the fan is assembled and fixed with the housing into an integrated body through screws. The steps include: fixing and arranging the parts of the laser engraving head in the cavity of the housing, and fixing the inner cover plate in the cavity so that the parts of the laser engraving head are sealed inside the cavity; communicating the nozzle at one end of the housing with the external air pump through a pneumatic quick connector, so that the air pump drives the nozzle to blow away dust and smoke generated during the operation of the laser engraving head; fixing the fan at the air exhaust port of the air duct at one end of the housing, so that the fan rotates to drive the air in the air duct to flow and exhaust heat; 8. The method of mounting a laser-engraving head heat sink according to claim 7, wherein, assembling the light shield cover on the outer side of the housing close to the nozzle. Adjusting the height of the light shield cover and locking it in a fixed position on the outer side of the housing by using a hand-tightening locking nut and a variable-diameter sleeve.

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