Laser cutting machine head protective cover

Abstract

The invention discloses a head protective cover for a laser cutting machine, which belongs to the field of laser cutting. A protective cover is added on the basis of an existing cutting head to effectively prevent the upper surface of a workpiece from being heavily contaminated by slag. The protective cover covers the cutting head and the bottom is in contact with the surface of the workpiece, thereby preventing the slag from splashing outward. Circulating cooling water is arranged inside the protective cover to effectively cool the cutting part and prevent deformation of the cut seam when cutting a thinner workpiece. The slag splashing is prevented by a sealing ring. At the same time, the sealing ring transfers the heat of the workpiece to the cooling water through an outer sleeve and a heat-conducting rod, thereby effectively cooling the parts around the cut seam of the workpiece and preventing thermal deformation. In addition, the cutting gas is purified by a fixed frame to effectively reduce the pungent smell during cutting and maintain good air quality in the workshop.

Description

Technical Field

[0001] The invention relates to the field of laser cutting, and more particularly to a head protective cover for a laser cutting machine. Background Art

[0002] Laser cutting uses a focused high-power density laser beam to irradiate the workpiece, causing the irradiated material to melt, vaporize, ablate or reach the ignition point quickly, and at the same time, uses a high-speed airflow coaxial with the beam to blow away the molten material, thereby cutting the workpiece. Laser cutting is one of the thermal cutting methods. The laser beam is focused into a very small light spot, so that the focus reaches a very high power density. At this time, the heat input by the beam far exceeds the part reflected, conducted or diffused by the material, and the material is quickly heated to the vaporization level and evaporates to form holes. As the beam and the material move linearly relative to each other, the holes are continuously formed into a very narrow slit. The cutting edge is little affected by heat, and there is basically no deformation of the workpiece.

[0003] Auxiliary gas suitable for the material being cut is also added during the cutting process. When cutting steel, oxygen is used as auxiliary gas to produce an exothermic chemical reaction with the molten metal to oxidize the material and help blow away the slag in the cut. Compressed air is used to cut plastics such as polypropylene, and inert gas is used to cut flammable materials such as cotton and paper. The auxiliary gas entering the nozzle can also cool the focusing lens to prevent smoke and dust from entering the lens seat to contaminate the lens and cause the lens to overheat.

[0004] When the current laser cutting machines are working, their cutting heads are directly exposed to the outside. During cutting, slag will continuously splash around. Although some slag is blown to the bottom by the auxiliary gas, some slag will still splash onto the upper surface of the workpiece being cut. The slag is difficult to remove, which directly affects the product quality of the workpiece. In addition, the gas during cutting plus the gas during material vaporization will have a pungent smell, which will make workers feel uncomfortable when staying in the workshop for a long time. Summary of the invention

[0005] 1. Technical problems to be solved

[0006] In view of the problems existing in the prior art, the purpose of the present invention is to provide a head protective cover for a laser cutting machine, which effectively prevents the upper surface of the workpiece from being contaminated by a large amount of slag by adding a protective cover on the basis of the existing cutting head. The protective cover covers the cutting head and the bottom is in contact with the surface of the workpiece, thereby preventing the slag from splashing outward. Circulating cooling water is arranged inside the protective cover to effectively cool the cutting part and prevent the deformation of the cut seam when cutting thinner workpieces. The sealing ring is used to prevent the slag from splashing. At the same time, the sealing ring transfers the heat of the workpiece to the cooling water through the outer sleeve and the heat conducting rod, effectively cooling the part around the cut seam of the workpiece to prevent thermal deformation. In addition, the cutting gas is purified by the fixed frame to effectively reduce the pungent smell during cutting and maintain good air quality in the workshop.

[0007] 2. Technical solution

[0008] To solve the above problems, the present invention adopts the following technical solutions.

[0009] A head protection cover for a laser cutting machine comprises a head seat, a cutting head is installed below the head seat, a protection cover is connected to the bottom of the head seat, and the cutting head is located inside the protection cover, a blocking skirt ring is fixedly connected to the lower end of the protection cover, and a slag sticking sleeve is connected to the inner wall of the protection cover, a plurality of water channels are opened inside the protection cover, and cooling water is injected into the water channels, a plurality of air ducts are opened on the side wall of the protection cover above the water channels, and a fixed frame is connected to the inner wall of the air duct, an air purification net is inserted on the fixed frame, an exhaust fan is installed outside the air duct, a groove is opened on the lower end side wall of the blocking skirt ring, and a sealing ring is connected to the upper end inner wall of the groove through a spring, and an outer sleeve is fixedly connected to the upper end side wall of the sealing ring, and a heat conducting rod is inlaid on the upper end inner wall of the blocking skirt ring, the lower end of the heat conducting rod penetrates into the inner part of the outer sleeve and is slidably connected thereto, and the upper end of the heat conducting rod penetrates into the water channel.

[0010] Furthermore, a heat conducting plate is fixedly connected to the upper end of the heat conducting rod, and a plurality of heat exchange elements arranged at equal intervals are fixedly connected to the heat conducting plate. The heat exchange elements increase the area of ​​heat exchange and achieve rapid heat transfer.

[0011] Furthermore, the heat exchange element includes an outer ring and an inner ring which are arranged concentrically, and the outer ring and the inner ring are connected by a plurality of heat-conducting rods, and each heat-conducting rod is fixedly connected to a plurality of heat exchange bars, and the inner wall of the inner ring is fixedly connected to a spoiler. This arrangement is to ensure that the cooling water is not hindered when flowing through the heat exchange element, and the heat exchange bars can reduce the flow rate, effectively prolonging the heat exchange time, and the spoiler disturbs the water flow, effectively improving the heat exchange efficiency.

[0012] Furthermore, a socket matching the air purification net is provided at the upper end of the fixing frame, and a slot is provided on the side wall of the fixing frame, so that the purification net can be fixed. Magnet blocks are embedded on both side walls of the fixing frame, and the magnet blocks are adsorbed to the inner wall of the air vent. The magnetic adsorption method facilitates the disassembly of the purification net for replacement.

[0013] Furthermore, the slag adhesive sleeve is connected to the side wall of the protective cover by magnetic adsorption, which is convenient for replacing the protective cover. The slag adhesive sleeve is made of high thermal conductivity material. The high temperature heat generated during cutting is transferred to the protective cover through the slag adhesive sleeve, and then the cooling water is used for cooling.

[0014] Furthermore, the water channel is a U-shaped channel, and the two ports of the U-shaped channel are respectively a water inlet and a water outlet, so that the cooling water can circulate and flow, effectively improving the heat dissipation effect.

[0015] Furthermore, the sealing ring and the outer sleeve are both made of high thermal conductivity materials, and the thermal conductivity of the outer sleeve is greater than that of the sealing ring. The heat around the workpiece slit is absorbed by the sealing ring, and the sealing ring then transfers the heat to the outer sleeve. The heat is exchanged with the cooling water through the heat-conducting rod and the heat exchange element.

[0016] Furthermore, the protective cover is connected to the lower end of the head seat by a thread, which facilitates the installation and removal of the protective cover, and the protective cover is made of heat-conducting material to further improve the heat dissipation effect.

[0017] Furthermore, the lowermost end of the cutting head is higher than the lowermost end of the blocking skirt ring, and the blocking skirt ring is made of friction-resistant material. The blocking skirt ring is used to reduce the gap between the protective cover and the workpiece to prevent slag from splashing through the gap.

[0018] Furthermore, a method for using a laser cutting machine head protective cover comprises the following steps:

[0019] S1, first put the slag sticking sleeve into the protective cover so that the two are adsorbed together, and then connect the protective cover with the headstock;

[0020] S2, then use a water pipe to connect the water channel with the external circulating water circuit, let the cooling water circulate before the cutting head works, and finally start the exhaust fan.

[0021] 3. Beneficial effects

[0022] Compared with the prior art, the advantages of the present invention are:

[0023] (1) This device effectively prevents the upper surface of the workpiece from being contaminated by slag by adding a protective cover on the basis of the existing cutting machine head. The protective cover covers the cutting machine head and the bottom is in contact with the surface of the workpiece, thereby preventing the slag from splashing outward. Circulating cooling water is arranged inside the protective cover to effectively cool the cutting part and prevent the deformation of the cutting seam when cutting thinner workpieces. The sealing ring is used to prevent the slag from splashing. At the same time, the sealing ring transfers the heat of the workpiece to the cooling water through the outer sleeve and the heat conducting rod, effectively cooling the parts around the cutting seam of the workpiece to prevent thermal deformation. In addition, the cutting gas is purified by the fixed frame, effectively reducing the pungent smell during cutting and maintaining good air quality in the workshop.

[0024] (2) The upper end of the heat-conducting rod is fixedly connected to a heat-conducting plate, and a plurality of heat exchange elements arranged at equal intervals are fixedly connected to the heat-conducting plate. The heat exchange elements increase the heat exchange area and realize rapid heat transfer.

[0025] (3) The heat exchange element includes an outer ring and an inner ring which are arranged concentrically. The outer ring and the inner ring are connected by a plurality of heat-conducting rods, and each heat-conducting rod is fixedly connected to a plurality of heat-exchange bars. The inner wall of the inner ring is fixedly connected to a spoiler. This arrangement is to ensure that the cooling water is not obstructed when flowing through the heat exchange element. The heat-exchange bars can reduce the flow rate and effectively extend the heat exchange time. The spoiler disturbs the water flow and effectively improves the heat exchange efficiency.

[0026] (4) A socket matching the air purification net is provided at the upper end of the fixed frame, and a slot is provided on the side wall of the fixed frame, so that the purification net can be fixed. Magnet blocks are embedded on both side walls of the fixed frame, and the magnet blocks are adsorbed to the inner wall of the air duct. The magnetic adsorption method facilitates the removal of the purification net for replacement.

[0027] (5) The slag sticky sleeve is connected to the side wall of the protective cover by magnetic adsorption, which is convenient for replacing the protective cover. The slag sticky sleeve is made of high thermal conductivity material. The high temperature heat generated during cutting is transferred to the protective cover through the slag sticky sleeve, and then the cooling water is used for cooling.

[0028] (6) The water channel is a U-shaped channel, and the two ends of the U-shaped channel are respectively a water inlet and a water outlet, so that the cooling water can circulate and effectively improve the heat dissipation effect.

[0029] (7) The sealing ring and the outer sleeve are both made of high thermal conductivity materials, and the thermal conductivity of the outer sleeve is greater than that of the sealing ring. The heat around the workpiece slit is absorbed by the sealing ring, which then transfers the heat to the outer sleeve. The heat is exchanged with the cooling water through the heat conducting rod and the heat exchange element.

[0030] (8) The protective cover is connected to the lower end of the machine head seat through a thread, which is convenient for installing and removing the protective cover. The protective cover is made of heat-conducting material to further improve the heat dissipation effect.

[0031] (9) The lowermost end of the cutting head is higher than the lowermost end of the blocking skirt ring, and the blocking skirt ring is made of friction-resistant material. The blocking skirt ring is used to reduce the gap between the protective cover and the workpiece to prevent slag from splashing through the gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a three-dimensional cross-sectional schematic diagram of the present invention;

[0033] Figure 2 It is a front cross-sectional schematic diagram of the present invention;

[0034] Figure 3 It is a working schematic diagram of the present invention;

[0035] Figure 4 It is a cross-sectional schematic diagram of the barrier skirt ring of the present invention;

[0036] Figure 5 It is a schematic front view of the heat exchange element of the present invention;

[0037] Figure 6 It is a three-dimensional schematic diagram of the fixing frame of the present invention;

[0038] Figure 7 It is a schematic diagram of the connection between the slag sticking sleeve and the protective cover of the present invention;

[0039] Figure 8 The present invention is an operational flow chart.

[0040] Description of reference numerals in the figures:

[0041] 1 head seat, 2 cutting head, 3 protective cover, 301 water channel, 302 air duct, 4 blocking skirt ring, 5 slag sticking sleeve, 6 sealing ring, 7 outer sleeve, 8 heat conducting rod, 9 heat exchange component, 901 outer ring, 902 inner ring, 903 heat exchange strip, 904 spoiler, 10 fixing frame, 1001 magnet block, 11 exhaust fan. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0043] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are 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 position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] Example:

[0046] See also Figure 1-8 , a laser cutting machine head protection cover, please refer to Figure 1 , including a head base 1, a cutting head 2 is installed below the head base 1, a protective cover 3 is connected below the head base 1, the protective cover 3 is connected to the lower end of the head base 1 through a thread, and the protective cover 3 is convenient for installing and removing the protective cover 3, and the protective cover 3 is made of heat-conducting material to further improve the heat dissipation effect, and the cutting head 2 is located inside the protective cover 3;

[0047] See also Figure 2 , 3 7. The lower end of the protective cover 3 is fixedly connected with a blocking skirt ring 4. The lowermost end of the cutting head 2 is higher than the lowermost end of the blocking skirt ring 4. The blocking skirt ring 4 is made of friction-resistant material. The blocking skirt ring 4 is to reduce the gap between the protective cover 3 and the workpiece to prevent the slag from splashing through the gap. The inner wall of the protective cover 3 is connected with a slag sticking sleeve 5. The slag sticking sleeve 5 is connected to the side wall of the protective cover 3 by magnetic adsorption, which is convenient for replacing the protective cover 3. The slag sticking sleeve 5 is made of high thermal conductivity material to prevent the high temperature generated during cutting. The heat is transferred to the protective cover 3 through the slag sticking sleeve 5, and then the cooling water is used for cooling. A plurality of water channels 301 are provided inside the protective cover 3. The water channels 301 are U-shaped channels, and the two ports of the U-shaped channels are respectively a water inlet and a water outlet, so that the cooling water can circulate and flow, effectively improving the heat dissipation effect. The cooling water is injected into the water channels 301. A plurality of air inlets 302 are provided on the side wall of the protective cover 3 above the water channels 301, and the inner wall of the air inlets 302 is connected to the fixing frame 10.

[0048] See also Figure 6 , a socket matching the air purification net is provided at the upper end of the fixed frame 10, and a slot is provided on the side wall of the fixed frame 10, so that the purification net can be fixed, magnet blocks 1001 are inlaid on both side walls of the fixed frame 10, and the magnet blocks 1001 are adsorbed on the inner wall of the air inlet 302, and the magnetic adsorption method facilitates the removal of the purification net for replacement, an air purification net is inserted on the fixed frame 10, and an exhaust fan 11 is installed outside the air inlet 302;

[0049] See also Figure 4 , a groove is provided on the lower end side wall of the blocking skirt ring 4, and a sealing ring 6 is connected to the upper end inner wall of the groove through a spring, and an outer sleeve 7 is fixedly connected to the upper end side wall of the sealing ring 6, and the sealing ring 6 and the outer sleeve 7 are both made of high thermal conductivity materials, and the thermal conductivity of the outer sleeve 7 is greater than that of the sealing ring 6, and the heat of the workpiece slit surrounding area is absorbed by the sealing ring 6, and the sealing ring 6 then transfers the heat to the outer sleeve 7, and the heat is exchanged with the cooling water through the heat conducting rod 8 and the heat exchange element 9, and the upper end inner wall of the blocking skirt ring 4 is inlaid with a heat conducting rod 8, and the upper end of the heat conducting rod 8 is fixedly connected to a heat conducting plate, and a plurality of heat exchange elements 9 arranged at equal intervals are fixedly connected to the heat conducting plate, and the heat exchange element 9 increases the heat exchange area to achieve rapid heat transfer;

[0050] See also Figure 5 The heat exchange element 9 includes an outer ring 901 and an inner ring 902 which are arranged concentrically. The outer ring 901 and the inner ring 902 are connected by a plurality of heat-conducting rods, and a plurality of heat-exchange bars 903 are fixedly connected to each heat-conducting rod. A spoiler 904 is fixedly connected to the inner wall of the inner ring 902. This arrangement is to ensure that the cooling water is not hindered when flowing through the heat exchange element 9. The heat-exchange bars 903 can reduce the flow rate and effectively extend the heat exchange time. The spoiler 904 disturbs the water flow and effectively improves the heat exchange efficiency. The lower end of the heat-conducting rod 8 penetrates into the interior of the outer sleeve 7 and is slidably connected thereto, and the upper end of the heat-conducting rod 8 penetrates into the water channel 301.

[0051] See also Figure 8 The method for using the device comprises the following steps:

[0052] S1, first put the slag sticking sleeve 5 into the protective cover 3 so that the two are adsorbed together, and then connect the protective cover 3 with the headstock 1;

[0053] S2, then use a water pipe to connect the water channel 301 with the external circulating water circuit, let the cooling water circulate before the cutting head 2 works, and finally start the exhaust fan 11.

[0054] The working principle of the device is as follows: after the protective cover 3 is installed in place, the protective cover 3 moves with the cutting head 2. During the cutting process, slag splashes onto the slag sticking sleeve 5, effectively preventing the surface of the workpiece from being polluted. The exhaust fan 11 exhausts air outwards, and the fixed frame 10 purifies and filters the gas, effectively reducing the pungent smell in the workshop. The heat around the workpiece slit is absorbed by the sealing ring 6, and the sealing ring 6 transfers the heat to the heat exchange element 9 through the outer sleeve 7 and the heat conducting rod 8. The heat exchange element 9 exchanges heat with the cooling water, thereby achieving cooling of the moving workpiece and effectively preventing thermal deformation.

[0055] By adding a protective cover 3 on the basis of the existing cutting head, the upper surface of the workpiece can be effectively prevented from being contaminated by a large amount of slag. The protective cover 3 covers the cutting head 2 and the bottom is in contact with the surface of the workpiece, thereby preventing the slag from splashing outward. The protective cover 3 is provided with circulating cooling water inside to effectively cool the cutting part and prevent the deformation of the cutting seam when cutting thinner workpieces. The sealing ring 6 is used to prevent the slag from splashing. At the same time, the sealing ring 6 transfers the heat of the workpiece through the outer sleeve 7 and the heat conducting rod 8 to the cooling water, effectively cooling the parts around the cutting seam of the workpiece to prevent thermal deformation. In addition, the cutting gas is purified by the fixed frame 10, effectively reducing the pungent smell during cutting and maintaining good air quality in the workshop.

[0056] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and improved concepts of the present invention within the technical scope disclosed by the present invention, and they should be covered by the protection scope of the present invention.

Claims

1. A head protection cover for a laser cutting machine, comprising a head base (1), a cutting head (2) being mounted below the head base (1), characterized in that: A protective cover (3) is connected below the head base (1), and the cutting head (2) is located inside the protective cover (3); a blocking skirt ring (4) is fixedly connected to the lower end of the protective cover (3), and a slag sticking sleeve (5) is connected to the inner wall of the protective cover (3); a plurality of water channels (301) are provided inside the protective cover (3), and cooling water is injected into the water channels (301); a plurality of air inlets (302) are provided on the side wall of the protective cover (3) above the water channels (301), and a fixed frame (10) is connected to the inner wall of the air inlet (302); an air purification net is inserted into the fixed frame (10), and a socket matching the air purification net is provided at the upper end of the fixed frame (10); A slot is provided on the side wall of the fixed frame (10), magnet blocks (1001) are embedded on both side walls of the fixed frame (10), and the magnet blocks (1001) are attracted to the inner wall of the air inlet (302), an exhaust fan (11) is installed outside the air inlet (302), a groove is provided on the lower side wall of the blocking skirt ring (4), and a sealing ring (6) is connected to the upper inner wall of the groove via a spring, an outer sleeve (7) is fixedly connected to the upper side wall of the sealing ring (6), a heat conducting rod (8) is embedded on the upper inner wall of the blocking skirt ring (4), the lower end of the heat conducting rod (8) penetrates into the inner part of the outer sleeve (7) and is slidably connected thereto, and the upper end of the heat conducting rod (8) penetrates into the water channel (301); The upper end of the heat-conducting rod (8) is fixedly connected to a heat-conducting plate, and a plurality of heat exchange elements (9) arranged at equal intervals are fixedly connected to the heat-conducting plate. The heat exchange element (9) comprises an outer ring (901) and an inner ring (902) arranged concentrically. The outer ring (901) and the inner ring (902) are connected via a plurality of heat-conducting rods, and each heat-conducting rod is fixedly connected to a plurality of heat exchange strips (903). A spoiler (904) is fixedly connected to the inner wall of the inner ring (902).

2. The laser cutting machine head protective cover according to claim 1, characterized in that: The slag sticking sleeve (5) is connected to the side wall of the protective cover (3) by means of magnetic adsorption, and the slag sticking sleeve (5) is made of a material with high thermal conductivity.

3. The laser cutting machine head protective cover according to claim 1, characterized in that: The water channel (301) is a U-shaped channel, and the two ends of the U-shaped channel are respectively a water inlet and a water outlet.

4. The laser cutting machine head protective cover according to claim 1, characterized in that: The sealing ring (6) and the outer sleeve (7) are both made of a material with high thermal conductivity, and the thermal conductivity of the outer sleeve (7) is greater than that of the sealing ring (6).

5. The laser cutting machine head protective cover according to claim 1, characterized in that: The protective cover (3) is connected to the lower end of the machine head seat (1) via a thread, and the protective cover (3) is made of a heat-conducting material.

6. The laser cutting machine head protective cover according to claim 1, characterized in that: The lowermost end of the cutting machine head (2) is higher than the lowermost end of the blocking skirt ring (4), and the blocking skirt ring (4) is made of a friction-resistant material.

7. The method for using the laser cutting machine head protective cover according to claim 1, characterized in that: The following steps are involved: S1, firstly, placing the slag sticking sleeve (5) into the protective cover (3) so that the two are adsorbed together, and then connecting the protective cover (3) and the headstock (1) together; S2, then use a water pipe to connect the water channel (301) with the external circulating water circuit, let the cooling water circulate before the cutting machine head (2) works, and finally start the exhaust fan (11).

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