Gas circuit cooling system of laser cutting head

Abstract

The utility model provides a gas circuit cooling system of a laser cutting head, which comprises a laser cutting head body, a first gas guide channel, a second gas guide channel and a third gas guide channel are arranged in the laser cutting head body, and the interiors of the first gas guide channel, the second gas guide channel and the third gas guide channel are communicated. The lower end of the third air guide channel is provided with three branch holes, namely a first vent hole, a second vent hole and a third vent hole, the input ends of the first vent hole, the second vent hole and the third vent hole are all communicated with the third air guide channel, and the output ends of the first vent hole, the second vent hole and the third vent hole all penetrate through the bottom of the lower cone; cooling gas sequentially passes through each gas guide channel and then respectively flows to the first vent hole, the second vent hole and the third vent hole from the output end of the third gas guide channel, and as the bottom of the lower cone is detachably connected with the nozzle through the locking ring, the cooling gas is transported to the locking ring and is exhausted through the round hole of the locking ring, so that the nozzle is uniformly cooled.

Description

Technical Field

[0001] The utility model relates to the technical field of laser cutting heads, and more specifically to an air path cooling system of a laser cutting head. Background Art

[0002] When laser cutting a workpiece, the nozzle acts as a channel for the high-energy light beam. During the cutting process, it is close to the cutting object and is exposed to a greater degree of heat radiation. At the same time, the continuous increase in the nozzle temperature will also cause the nozzle itself and the connecting parts to deform and damage.

[0003] Existing technologies such as Chinese patent: CN219004991U disclose a high-efficiency cooling ceramic ring and a laser cutting head including the ceramic ring, wherein the ceramic ring includes a ceramic ring body, the upper end surface of the ceramic ring body is provided with an annular air guide groove, the annular air guide groove is used to connect to an external cooling gas source, and the lower surface of the annular air guide groove is provided with a plurality of air guide holes, the air guide holes penetrate to the lower end surface of the ceramic ring body, and the air guide holes are used to guide the cooling gas to the cutting nozzle. The present application provides an annular air guide groove on the ceramic ring body, and an air guide hole on the annular air guide groove, so that the ceramic ring does not block the circulation of the cooling gas.

[0004] However, this patent cools the ceramic ring body through an annular air guide groove and a plurality of air guide holes, but when the cooling gas passes into the ceramic ring body, energy loss will be caused due to the large space. Utility Model Content

[0005] In view of this, in order to solve the above problems, the utility model proposes an air path cooling system for a laser cutting head, including a laser cutting head body, characterized in that: the laser cutting head body includes a conversion plate 1, an upper cone 2, a lower cone 3, a locking ring 4, a ceramic ring 5 and a nozzle 6 from top to bottom, a first chamber 10 is arranged at the center of the conversion plate 1, and the conversion plate 1 is respectively provided with a first air guide channel 11 and a first wire channel 12 near the first chamber 10, the first air guide channel 11 and the first wire channel 12 respectively extend from the outer wall of the conversion plate 1 to the position near the first chamber 10, a second air guide channel 21 and a second wire channel 22 are respectively arranged inside the upper cone 2, and the input ends of the second air guide channel 21 and the second wire channel 22 are matched with the output ends of the first air guide channel 11 and the first wire channel 12 respectively, and a third air guide channel 31 and a third wire channel 32 are respectively arranged inside the lower cone 3, and the input ends of the third air guide channel 31 and the third wire channel 32 are matched with the input ends of the second air guide channel 21 and the second wire channel 22 respectively. The output end of the line channel 22, the lower end of the third air guide channel 31 is provided with three branch holes, namely the first air vent 331, the second air vent 332 and the third air vent 333, the input ends of the first air vent 331, the second air vent 332 and the third air vent 333 are all connected to the third air guide channel 31, and the diameters are all smaller than the diameter of the third air guide channel 31, and the output ends thereof all penetrate to the bottom of the lower cone 3, the locking ring 4 is detachably connected to the bottom of the lower cone 3 and the top of the ceramic ring 5, and the nozzle 6 is detachable It is connected to the ceramic ring 5, and a plurality of circular holes 41 are evenly arranged at the bottom of the ceramic ring 5. The cooling gas passes through the first air guide channel 11, the second air guide channel 21 and the third air guide channel 31 in sequence, and then flows from the output end of the third air guide channel 31 to the first air hole 331, the second air hole 332 and the third air hole 333 respectively. Since the bottom of the lower cone 3 is detachably connected to the nozzle 6 through the locking ring 4, the cooling gas is transported to the locking ring 4 and exhausted through the circular holes 41 of the locking ring 4, so that the nozzle 6 is evenly cooled.

[0006] Furthermore, a first mounting block 13 and a second mounting block 14 are provided on the side wall of the conversion plate 1, and the first mounting block 13 and the second mounting block 14 are both screwed to the side wall of the conversion plate 1, and an air circuit interface 131 is provided inside the first mounting block 13, and the input end of the air circuit interface 131 is connected to the external cooling gas, and the output end is matched and connected with the input end of the first air guide channel 11, and a line interface 141 is provided inside the second mounting block 14, and the input end of the line interface 141 is connected to the external line, and the output end is matched and connected with the input end of the first wire channel 12.

[0007] Furthermore, the top of the upper cone 2 is matched and locked with the bottom of the conversion plate 1 by screws, and the lower part of the upper cone 2 is matched and locked with the upper part of the lower cone 3 by screws. The lower part of the upper cone 2 and the upper part of the lower cone 3 form a frustum with a downward top angle and a cone angle of 7.98°~8°, which is used for avoidance setting when the laser cutting head body is cutting.

[0008] Furthermore, the busbar at the lower part of the upper cone 2 is parallel to the second air guide channel 21 and the third air guide channel 31, the busbar at the upper part of the lower cone 3 is parallel to the second wire channel 22 and the third wire channel 32, the first air hole 331, the second air hole 332 and the third air hole 333 are arranged parallel to each other, and the angle between them and the vertical line of the center of the laser cutting head body is 175°.

[0009] Furthermore, the outer wall of the lower part of the lower cone 3 is provided with a circle of external threads, the cross-section of the locking ring 4 is L-shaped, the inner wall of the locking ring 4 is provided with a circle of internal threads, the bottom inner ring of the locking ring 4 is provided with a circle of bosses 42, and the upper part of the ceramic ring 5 is provided with a circle of raised outer rings 51, the bosses 42 are matched and abutted with the raised outer rings 51, and after the locking ring 4 abuts with the ceramic ring 5, the locking ring 4 is locked with the lower cone 3 through threads, so that the ceramic ring 5 and the lower cone 3 are detachably connected, the bottom of the lower cone 3 does not contact the bottom of the inner ring of the locking ring 4, and after the connection, an annular chamber is formed for the circulation of cooling gas.

[0010] Furthermore, the nozzle 6 is gyroscope-shaped, with a circle of external threads on the annular outer wall at the top of the nozzle 6, and a circle of internal threads on the inner wall at the lower part of the ceramic ring 5. The nozzle 6 and the ceramic ring 5 are threadedly locked, and the nozzle 6 and the bottom surface of the ceramic ring 5 abut against each other, and the diameter of the contact surface between the nozzle 6 and the ceramic ring 5 is larger than the diameter of the bottom surface of the ceramic ring 5, which is used to avoid the ceramic ring 5 during cutting.

[0011] Furthermore, a second chamber 20 is set through the inner center of the upper cone 2, a third chamber 30 is set through the inner center of the lower cone 3, a fourth chamber 50 is set through the inner center of the ceramic ring 5, and a fifth chamber 60 is set in the inner center of the nozzle 6. The upper part of the second chamber 20 is matched and connected with the first chamber 10, the lower part of the second chamber 20 is matched and connected with the third chamber 30, the lower part of the third chamber 30 is matched and connected with the fourth chamber 50, and the lower part of the fourth chamber 50 is matched and connected with the fifth chamber 60.

[0012] Furthermore, the frustum formed by the lower part of the second chamber 20 and the upper part of the third chamber 30 are similar to the frustum formed by the lower part of the upper cone 2 and the upper part of the lower cone 3, and the upper base radius and the lower base radius in the cavity are smaller than the upper base radius and the lower base radius of the outer wall of the cone. The lower part of the third chamber 30 is cylindrically arranged to avoid changes in taper after direct laser irradiation.

[0013] Furthermore, the fourth chamber 50 is configured as a truncated cone, the top surface of the fourth chamber 50 matches the bottom surface of the third chamber 30, and the bottom surface diameter of the fourth chamber 50 is larger than the diameter of the top surface of the fifth chamber 60, which is used to improve the accuracy of the laser and the nozzle 6 outlet. The upper part of the fifth chamber 60 is configured as a truncated cone, and the lower part is cylindrical, which is used for the laser outlet to reduce the influence of the laser on the inside of the nozzle 6.

[0014] Furthermore, a current sensor is externally provided between the nozzle 6 and the ceramic ring 5 for sensing the distance between the nozzle 6 and the workpiece. The current sensor is connected to the radio frequency line, and the external radio frequency line is connected to the current sensor through the first wire channel 12, the second wire channel 22 and the third wire channel 32 for stabilizing the output signal of the current sensor.

[0015] Beneficial effects of the utility model: The utility model proposes an air path cooling system for a laser cutting head, comprising a laser cutting head body, wherein the laser cutting head body comprises, from top to bottom, a conversion plate 1, an upper cone 2, a lower cone 3, a locking ring 4, a ceramic ring 5 and a nozzle 6, a first chamber 10 is arranged at the center of the conversion plate 1, and a first air guide channel 11 and a first wire channel 12 are respectively arranged on the conversion plate 1 near the first chamber 10, the first air guide channel 11 and the first wire channel 12 respectively extend from the outer wall of the conversion plate 1 to near the first chamber 10, a second air guide channel 21 and a second wire channel 22 are respectively arranged inside the upper cone 2, the input ends of the second air guide channel 21 and the second wire channel 22 are respectively matched with the output ends of the first air guide channel 11 and the first wire channel 12, a third air guide channel 31 and a third wire channel 32 are respectively arranged inside the lower cone 3, the input ends of the third air guide channel 31 and the third wire channel 32 are respectively matched with the second air guide channel 21 and the second wire channel 22 The output end of the third air guide channel 31 is provided with three branch holes at the lower end, namely the first air vent 331, the second air vent 332 and the third air vent 333. The input ends of the first air vent 331, the second air vent 332 and the third air vent 333 are all connected to the third air guide channel 31, and the diameters are all smaller than the diameter of the third air guide channel 31. The output ends thereof all penetrate to the bottom of the lower cone 3. The locking ring 4 is detachably connected to the bottom of the lower cone 3 and the top of the ceramic ring 5. The nozzle 6 is detachably connected to the bottom of the lower cone 3 and the top of the ceramic ring 5. On the ceramic ring 5, a plurality of circular holes 41 are evenly arranged at the bottom of the ceramic ring 5. The cooling gas passes through the first air guide channel 11, the second air guide channel 21 and the third air guide channel 31 in sequence, and then flows from the output end of the third air guide channel 31 to the first air hole 331, the second air hole 332 and the third air hole 333 respectively. Since the bottom of the lower cone 3 is detachably connected to the nozzle 6 through the locking ring 4, the cooling gas is transported to the locking ring 4 and exhausted through the circular hole 41 of the locking ring 4, so that the nozzle 6 is evenly cooled. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of an explosion of the gas path cooling system of the laser cutting head of the present application.

[0017] Figure 2 This is a cross-sectional view of the gas path cooling system of the laser cutting head of the present application.

[0018] Figure 3 This is a cross-sectional view of the gas path cooling system of the laser cutting head of the present application.

[0019] Figure 4 This is a cross-sectional view of the gas path cooling system of the laser cutting head of the present application.

[0020] Figure 5This is a cross-sectional view of a conversion plate of the gas path cooling system of the laser cutting head of the present application.

[0021] Figure 6 This is a schematic diagram of the overall structure of the gas path cooling system of the laser cutting head of the present application.

[0022] Main component symbols

[0023] Conversion plate 1, upper cone 2, lower cone 3, locking ring 4, ceramic ring 5, nozzle 6, first chamber 10, first air guide channel 11, first wire channel 12, first mounting block 13, second mounting block 14, air path interface 131, line interface 141, second air guide channel 21, second wire channel 22, third air guide channel 31, third wire channel 32, first air vent 331, second air vent 332, third air vent 333, circular hole 41, boss 42, raised outer ring 51, second chamber 20, third chamber 30, fourth chamber 50, fifth chamber 60.

[0024] The following specific implementation manner will further illustrate the present utility model in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0025] The following examples are described to assist the understanding of the present application, and the examples are not and should not be interpreted in any way as limiting the scope of protection of the present application.

[0026] In the following description, those skilled in the art will recognize that throughout this discussion, components may be described as separate functional units (which may include sub-units), but those skilled in the art will recognize that various components or portions thereof may be divided into separate components or may be integrated together (including within a single system or component).

[0027] At the same time, the connections between components or systems are not intended to be limited to direct connections, rather, the data between these components may be modified, reformatted, or otherwise changed by intermediate components. In addition, additional or fewer connections may be used. It should also be noted that the terms "coupled," "connected," or "input" should be understood to include direct connections, indirect connections through one or more intermediate devices, and wireless connections. Embodiment 1:

[0028] like Figure 1-6As shown, a gas path cooling system for a laser cutting head comprises a laser cutting head body, wherein the laser cutting head body comprises, from top to bottom, a conversion plate 1, an upper cone 2, a lower cone 3, a locking ring 4, a ceramic ring 5 and a nozzle 6, a first chamber 10 is arranged at the center of the conversion plate 1, and a first air guide channel 11 and a first wire channel 12 are respectively arranged on the conversion plate 1 near the first chamber 10, the first air guide channel 11 and the first wire channel 12 respectively extend from the outer wall of the conversion plate 1 to near the first chamber 10, a second air guide channel 21 and a second wire channel 22 are respectively arranged inside the upper cone 2, the input ends of the second air guide channel 21 and the second wire channel 22 are respectively matched with the output ends of the first air guide channel 11 and the first wire channel 12, a third air guide channel 31 and a third wire channel 32 are respectively arranged inside the lower cone 3, the input ends of the third air guide channel 31 and the third wire channel 32 are respectively matched with the output ends of the second air guide channel 21 and the second wire channel 22, the The lower end of the third air guide channel 31 is provided with three branch holes, namely the first air vent 331, the second air vent 332 and the third air vent 333. The input ends of the first air vent 331, the second air vent 332 and the third air vent 333 are all connected to the third air guide channel 31, and the diameters are all smaller than the diameter of the third air guide channel 31. The output ends thereof all penetrate to the bottom of the lower cone 3. The locking ring 4 is detachably connected to the bottom of the lower cone 3 and the top of the ceramic ring 5. The nozzle 6 is detachably connected to the ceramic ring 5, a plurality of circular holes 41 are evenly arranged at the bottom of the ceramic ring 5, and the cooling gas passes through the first air guide channel 11, the second air guide channel 21 and the third air guide channel 31 in sequence, and then flows from the output end of the third air guide channel 31 to the first air hole 331, the second air hole 332 and the third air hole 333 respectively. Since the bottom of the lower cone 3 is detachably connected to the nozzle 6 through the locking ring 4, the cooling gas is transported to the locking ring 4 and exhausted through the circular hole 41 of the locking ring 4, so that the nozzle 6 is evenly cooled.

[0029] In some embodiments, a first mounting block 13 and a second mounting block 14 are provided on the side wall of the conversion board 1, and the first mounting block 13 and the second mounting block 14 are both screwed to the side wall of the conversion board 1, and an air circuit interface 131 is provided inside the first mounting block 13, and the input end of the air circuit interface 131 is connected to the external cooling gas, and the output end is matched and connected with the input end of the first air guide channel 11, and a line interface 141 is provided inside the second mounting block 14, and the input end of the line interface 141 is connected to the external line, and the output end is matched and connected with the input end of the first wire channel 12.

[0030] In some embodiments, the top of the upper cone 2 is matched and locked with the bottom of the conversion plate 1 by screws, and the lower part of the upper cone 2 is matched and locked with the upper part of the lower cone 3 by screws. The lower part of the upper cone 2 and the upper part of the lower cone 3 form a frustum with a downward top angle and a cone angle of 7.98°~8°, which is used for avoidance setting when the laser cutting head body is cutting.

[0031] In some embodiments, the busbar at the lower portion of the upper cone 2 is parallel to the second air guide channel 21 and the third air guide channel 31, the busbar at the upper portion of the lower cone 3 is parallel to the second wire channel 22 and the third wire channel 32, the first air hole 331, the second air hole 332 and the third air hole 333 are arranged parallel to each other, and the angle between them and the vertical line of the center of the laser cutting head body is 175°.

[0032] In some embodiments, the outer wall of the lower part of the lower cone 3 is provided with a circle of external threads, the cross-section of the locking ring 4 is L-shaped, the inner wall of the locking ring 4 is provided with a circle of internal threads, the bottom inner ring of the locking ring 4 is provided with a circle of bosses 42, and the upper part of the ceramic ring 5 is provided with a circle of raised outer rings 51, and the bosses 42 are matched and abutted with the raised outer rings 51. After the locking ring 4 abuts with the ceramic ring 5, the locking ring 4 is locked with the lower cone 3 through threads, so that the ceramic ring 5 and the lower cone 3 are detachably connected, the bottom of the lower cone 3 does not contact the bottom of the inner ring of the locking ring 4, and after the connection, an annular chamber is formed for the circulation of cooling gas.

[0033] In some embodiments, the nozzle 6 is gyroscope-shaped, with a circle of external threads on the annular outer wall at the top of the nozzle 6, and a circle of internal threads on the inner wall at the bottom of the ceramic ring 5. The nozzle 6 and the ceramic ring 5 are threadedly locked, and the nozzle 6 and the bottom surface of the ceramic ring 5 abut against each other, and the diameter of the contact surface between the nozzle 6 and the ceramic ring 5 is larger than the diameter of the bottom surface of the ceramic ring 5, which is used to avoid the ceramic ring 5 during cutting.

[0034] In some embodiments, a second chamber 20 is disposed through the inner center of the upper cone 2, a third chamber 30 is disposed through the inner center of the lower cone 3, a fourth chamber 50 is disposed through the inner center of the ceramic ring 5, and a fifth chamber 60 is disposed in the inner center of the nozzle 6. The upper portion of the second chamber 20 is matched and connected with the first chamber 10, the lower portion of the second chamber 20 is matched and connected with the third chamber 30, the lower portion of the third chamber 30 is matched and connected with the fourth chamber 50, and the lower portion of the fourth chamber 50 is matched and connected with the fifth chamber 60.

[0035] In some embodiments, the frustum formed by the lower portion of the second chamber 20 and the upper portion of the third chamber 30 is similar to the frustum formed by the lower portion of the upper cone 2 and the upper portion of the lower cone 3, and the upper base radius and the lower base radius in the cavity are smaller than the upper base radius and the lower base radius of the outer wall of the cone. The lower portion of the third chamber 30 is cylindrically arranged to avoid changes in taper after direct laser irradiation.

[0036] In some embodiments, the fourth chamber 50 is configured as a truncated cone, the top surface of the fourth chamber 50 matches the bottom surface of the third chamber 30, and the bottom surface diameter of the fourth chamber 50 is larger than the diameter of the top surface of the fifth chamber 60, which is used to improve the accuracy of the laser and the nozzle 6 outlet. The upper part of the fifth chamber 60 is configured as a truncated cone, and the lower part is cylindrical, which is used for the laser outlet to reduce the influence of the laser on the inside of the nozzle 6.

[0037] In some embodiments, a current sensor is externally provided between the nozzle 6 and the ceramic ring 5 for sensing the distance between the nozzle 6 and the workpiece. The current sensor is connected to the radio frequency line. The external radio frequency line is connected to the current sensor through the first wire channel 12, the second wire channel 22 and the third wire channel 32 for stabilizing the output signal of the current sensor.

[0038] Beneficial effects of the utility model: The utility model proposes an air path cooling system for a laser cutting head, comprising a laser cutting head body, wherein the laser cutting head body comprises, from top to bottom, a conversion plate 1, an upper cone 2, a lower cone 3, a locking ring 4, a ceramic ring 5 and a nozzle 6, a first chamber 10 is arranged at the center of the conversion plate 1, and a first air guide channel 11 and a first wire channel 12 are respectively arranged on the conversion plate 1 near the first chamber 10, the first air guide channel 11 and the first wire channel 12 respectively extend from the outer wall of the conversion plate 1 to near the first chamber 10, a second air guide channel 21 and a second wire channel 22 are respectively arranged inside the upper cone 2, the input ends of the second air guide channel 21 and the second wire channel 22 are respectively matched with the output ends of the first air guide channel 11 and the first wire channel 12, a third air guide channel 31 and a third wire channel 32 are respectively arranged inside the lower cone 3, the input ends of the third air guide channel 31 and the third wire channel 32 are respectively matched with the second air guide channel 21 and the second wire channel 22 The output end of the third air guide channel 31 is provided with three branch holes at the lower end, namely the first air vent 331, the second air vent 332 and the third air vent 333. The input ends of the first air vent 331, the second air vent 332 and the third air vent 333 are all connected to the third air guide channel 31, and the diameters are all smaller than the diameter of the third air guide channel 31. The output ends thereof all penetrate to the bottom of the lower cone 3. The locking ring 4 is detachably connected to the bottom of the lower cone 3 and the top of the ceramic ring 5. The nozzle 6 is detachably connected to the bottom of the lower cone 3 and the top of the ceramic ring 5. On the ceramic ring 5, a plurality of circular holes 41 are evenly arranged at the bottom of the ceramic ring 5. The cooling gas passes through the first air guide channel 11, the second air guide channel 21 and the third air guide channel 31 in sequence, and then flows from the output end of the third air guide channel 31 to the first air hole 331, the second air hole 332 and the third air hole 333 respectively. Since the bottom of the lower cone 3 is detachably connected to the nozzle 6 through the locking ring 4, the cooling gas is transported to the locking ring 4 and exhausted through the circular hole 41 of the locking ring 4, so that the nozzle 6 is evenly cooled.

[0039] Although the present application has disclosed multiple aspects and embodiments, other aspects and embodiments will be obvious to those skilled in the art, and several modifications and improvements may be made without departing from the concept of the present application, all of which belong to the protection scope of the present application. The multiple aspects and embodiments disclosed in the present application are only for illustration and are not intended to limit the present application. The actual protection scope of the present application shall be subject to the claims.

Claims

1. A gas path cooling system for a laser cutting head, comprising a laser cutting head body, characterized in that: The laser cutting head body comprises, from top to bottom, a conversion plate (1), an upper cone (2), a lower cone (3), a locking ring (4), a ceramic ring (5) and a nozzle (6); a first chamber (10) is arranged at the center of the conversion plate (1); a first air guide channel (11) and a first wire channel (12) are respectively arranged on the conversion plate (1) near the first chamber (10); the first air guide channel (11) and the first wire channel (12) respectively extend from the outer wall of the conversion plate (1) to near the first chamber (10); a first gas guide channel (11) and a first wire channel (12) are respectively arranged inside the upper cone (2); The second air guiding channel (21) and the second wire channel (22), the input ends of the second air guiding channel (21) and the second wire channel (22) respectively match the output ends of the first air guiding channel (11) and the first wire channel (12), a third air guiding channel (31) and a third wire channel (32) are arranged inside the lower cone (3), the input ends of the third air guiding channel (31) and the third wire channel (32) respectively match the output ends of the second air guiding channel (21) and the second wire channel (22), and the lower end of the third air guiding channel (31) is provided with The three branch holes are respectively a first vent hole (331), a second vent hole (332) and a third vent hole (333); the input ends of the first vent hole (331), the second vent hole (332) and the third vent hole (333) are all connected to the third air guide channel (31), and the diameters of the first vent hole (331), the second vent hole (332) and the third vent hole (333) are all smaller than the diameter of the third air guide channel (31); the output ends thereof all penetrate to the bottom of the lower cone (3); the locking ring (4) is detachably connected to the bottom of the lower cone (3) and the top of the ceramic ring (5); the nozzle (6) is detachably connected to the ceramic ring (5); the ceramic ring A plurality of circular holes (41) are evenly arranged at the bottom of the lower cone (5), and the cooling gas passes through the first air guide channel (11), the second air guide channel (21) and the third air guide channel (31) in sequence, and then flows from the output end of the third air guide channel (31) to the first air vent (331), the second air vent (332) and the third air vent (333) respectively. Since the bottom of the lower cone (3) is detachably connected to the nozzle (6) through the locking ring (4), the cooling gas is transported to the locking ring (4) and exhausted through the circular hole (41) of the locking ring (4), so that the nozzle (6) is evenly cooled.

2. The gas path cooling system for a laser cutting head according to claim 1, characterized in that: A first mounting block (13) and a second mounting block (14) are provided on the side wall of the conversion plate (1); the first mounting block (13) and the second mounting block (14) are both screwed to the side wall of the conversion plate (1); a gas circuit interface (131) is provided inside the first mounting block (13); an input end of the gas circuit interface (131) is connected to external cooling gas, and an output end is matched and communicated with an input end of the first gas guide channel (11); a line interface (141) is provided inside the second mounting block (14); an input end of the line interface (141) is connected to an external line, and an output end is matched and communicated with an input end of the first wire channel (12).

3. The gas path cooling system for a laser cutting head according to claim 1, characterized in that: The top of the upper cone (2) is matched and locked with the bottom of the conversion plate (1) by means of screws, and the lower part of the upper cone (2) is matched and locked with the upper part of the lower cone (3) by means of screws. The lower part of the upper cone (2) and the upper part of the lower cone (3) form a truncated cone with a top angle facing downward and a cone angle of 7.98° to 8°, which is used for avoiding position when the laser cutting head body is cutting.

4. The gas path cooling system for a laser cutting head according to claim 1, characterized in that: The busbar at the lower part of the upper cone (2) is parallel to the second air guide channel (21) and the third air guide channel (31), the busbar at the upper part of the lower cone (3) is parallel to the second wire channel (22) and the third wire channel (32), the first vent hole (331), the second vent hole (332) and the third vent hole (333) are arranged parallel to each other, and the angle formed between them and the vertical line at the center of the laser cutting head body is 175°.

5. The gas path cooling system for a laser cutting head according to claim 1, characterized in that: The outer wall of the lower part of the lower cone (3) is provided with a circle of external threads, the cross section of the locking ring (4) is L-shaped, the inner wall of the locking ring (4) is provided with a circle of internal threads, the bottom inner ring of the locking ring (4) is provided with a circle of bosses (42), the upper part of the ceramic ring (5) is provided with a circle of raised outer rings (51), the bosses (42) and the raised outer rings (51) are matched and abutted, and after the locking ring (4) abuts with the ceramic ring (5), it is locked with the lower cone (3) through the threads, so that the ceramic ring (5) and the lower cone (3) are detachably connected, the bottom of the lower cone (3) does not contact the bottom of the inner ring of the locking ring (4), and after the connection, an annular chamber is formed for the circulation of cooling gas.

6. The gas path cooling system for a laser cutting head according to claim 1, characterized in that: The nozzle (6) is arranged in a gyro shape, a circle of external threads is provided on the annular outer wall at the top of the nozzle (6), and a circle of internal threads is provided on the inner wall at the bottom of the ceramic ring (5). The nozzle (6) and the ceramic ring (5) are locked by threads, the bottom surfaces of the nozzle (6) and the ceramic ring (5) abut against each other, and the diameter of the contact surface between the nozzle (6) and the ceramic ring (5) is larger than the diameter of the bottom surface of the ceramic ring (5), so as to avoid the ceramic ring (5) when cutting.

7. The gas path cooling system for a laser cutting head according to claim 1, characterized in that: The second chamber (20) is disposed at the inner center of the upper cone (2), the third chamber (30) is disposed at the inner center of the lower cone (3), the fourth chamber (50) is disposed at the inner center of the ceramic ring (5), and the fifth chamber (60) is disposed at the inner center of the nozzle (6); the upper portion of the second chamber (20) is matched and connected with the first chamber (10), the lower portion of the second chamber (20) is matched and connected with the third chamber (30), the lower portion of the third chamber (30) is matched and connected with the fourth chamber (50), and the lower portion of the fourth chamber (50) is matched and connected with the fifth chamber (60).

8. The gas path cooling system for a laser cutting head according to claim 7, characterized in that: The frustum formed by the lower part of the second chamber (20) and the upper part of the third chamber (30) is similar to the frustum formed by the lower part of the upper cone (2) and the upper part of the lower cone (3), and the upper base radius and the lower base radius in the chamber are smaller than the upper base radius and the lower base radius of the outer wall of the cone. The lower part of the third chamber (30) is cylindrically arranged to prevent the taper from changing after the laser is directly irradiated.

9. The gas path cooling system for a laser cutting head according to claim 7, characterized in that: The fourth chamber (50) is in the form of a truncated cone. The top surface of the fourth chamber (50) matches the bottom surface of the third chamber (30). The bottom surface diameter of the fourth chamber (50) is larger than the top surface diameter of the fifth chamber (60). This is used to improve the accuracy of the laser and the nozzle (6) outlet. The upper portion of the fifth chamber (60) is in the form of a truncated cone, and the lower portion is cylindrical. This is used for the laser outlet, thereby reducing the influence of the laser on the inside of the nozzle (6).

10. The gas path cooling system for a laser cutting head according to claim 1, characterized in that: A current sensor is also externally provided between the nozzle (6) and the ceramic ring (5) for sensing the distance between the nozzle (6) and the workpiece. The current sensor is connected to a radio frequency line. The external radio frequency line is connected to the current sensor via a first wire channel (12), a second wire channel (22) and a third wire channel (32) for stabilizing the output signal of the current sensor.

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