Double-gas-path cooling system of laser cutting head

Abstract

The utility model provides a double gas circuit cooling system of a laser cutting head, which comprises a laser cutting head body, a plurality of gas guide channels and a plurality of spare gas guide channels are arranged in the laser cutting head body, the lower end of a lower support body is detachably connected with the upper end of a ceramic ring through a lock ring, and the ceramic ring is detachably connected with a nozzle. An inner ring body and an outer ring body are arranged on the lower portion of the lower supporting body, a first gap is formed between the bottom of the inner ring body and the top of the ceramic ring, a second gap is formed between the bottom of the outer ring body and the bottom of the locking ring, the output end of the standby air guide channel extends to the bottom of the inner ring body and communicates with the first gap, and the output end of the air guide channel extends to the bottom of the outer ring body. A plurality of circular holes are formed in the bottom of the ceramic ring, when cooling gas circulates in the laser cutting head body, the cooling gas in the second gap flows out through the circular holes to cool the nozzle, and the cooling gas in the first gap directly cools the ceramic ring; and double cooling of the nozzle and the ceramic ring is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of laser cutting heads, and more specifically to a dual gas 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: CN112264728B disclose a new cooling ceramic body used on a laser cutting head. First air holes are opened at corresponding positions on the ceramic body and the conductive part. The outlet position of the second air hole of the conductive part is connected to the circular groove at the bottom of the conductive part. The first air hole and the second air hole are connected to form a first air path. The position of the cooling ceramic body on the cutting head is located at the bottom of the capacitor head. The capacitor head is provided with a second air path connected to the first air hole. The cooling gas flows into the second air path at the corresponding position after passing through the second air path of the capacitor head. A nozzle is connected below the ceramic body. The gas flows in the circular groove and can be discharged from the gap around the conductive part and the nozzle, thereby ensuring uniform and efficient cooling of the nozzle.

[0004] However, although this patent can efficiently cool the nozzle through the air path, when the heat affected zone becomes larger, it will also affect the ceramic ring. In view of this, the utility model proposes a dual air path cooling system for a laser cutting head that can achieve dual cooling of the nozzle and the ceramic ring. Utility Model Content

[0005] In view of this, in order to solve the above problems, the utility model proposes a dual 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 support body 2, a lower support body 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 a first air guide channel 11, a first wire channel 12 and a first spare air guide channel 13 are respectively provided on the conversion plate 1 near the first chamber 10, the first air guide channel 11, the first wire channel 12 and the first spare air guide channel 13 extend from the outer wall of the conversion plate 1 to the position near the first chamber 10, and a second air guide channel 11, a first wire channel 12 and a first spare air guide channel 13 are respectively provided inside the upper support body 2. The output ends of the first air guide channel 11, the first wire channel 12 and the first spare air guide channel 13 are matched and connected to the input ends of the second air guide channel 21, the second wire channel 22 and the second spare air guide channel 23 respectively. The third air guide channel 31, the third wire channel 32 and the third spare air guide channel 33 are arranged through the lower support body 3. The lower end of the third air guide channel 31 is provided with three branch holes, namely: a first air vent 311, a second air vent 312 and a third air vent 313. The input ends of the first air vent 311, the second air vent 312 and the third air vent 313 are all connected to the output end of the third air guide channel 31. The diameters thereof are smaller than the diameter of the third air guide channel 31. The input ends of the third air guide channel 31, the third wire channel 32 and the third spare air guide channel 33 are matched and connected to the output ends of the second air guide channel 21, the second wire channel 22 and the second spare air guide channel 23 respectively. The lower end of the lower support body 3 is detachably connected to the upper end of the ceramic ring 5 through the lock ring 4. The ceramic ring 5 is detachably connected to the nozzle 6. The lower part of the lower support body 3 is provided with an inner ring body 34 and an outer ring body 35 protruding downward. A first gap is provided between the bottom of the inner ring body 34 and the top of the ceramic ring 5. A second gap is provided between the bottom of the outer ring body 35 and the bottom of the lock ring 4. The output ends of the third wire channel 32 and the third spare air guide channel 33 extend to the bottom of the inner ring body 34 and are connected to the first gap. The output ends of the first air hole 311, the second air hole 312 and the third air hole 313 extend to the bottom of the outer ring body 35 and are connected to the second gap. A plurality of circular holes 41 are provided at the bottom of the ceramic ring 5. When the cooling gas flows in the laser cutting head body, the cooling gas in the second gap flows out through the circular holes 41 to cool the nozzle 6. The cooling gas in the first gap will directly cool the ceramic ring 5, thereby realizing double cooling of the nozzle 6 and the ceramic ring 5.

[0006] In some embodiments, a first mounting block 14 and a second mounting block 15 are provided on the side wall of the conversion board 1, and the first mounting block 14 and the second mounting block 15 are both screwed to the side wall of the conversion board 1, and an air circuit interface 141 is provided inside the first mounting block 14, and the input end of the air circuit interface 141 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; a line interface 151 is provided inside the second mounting block 15, and the input end of the line interface 151 is connected to the external line, and the output end is matched and connected with the input end of the first wire channel 12, and the input end of the first backup air guide channel 13 is directly connected to the external cooling gas.

[0007] Furthermore, the top of the upper support body 2 is matched and locked with the bottom of the conversion plate 1 by screws, the outer wall of the lower part of the upper support body 2 is provided with an external thread, and the inner wall of the upper part of the lower support body 3 is provided with an internal thread. The upper support body 2 and the lower support body 3 are matched and locked by threads. The upper support body 2 is a cylindrical structure, and the middle part of the lower support body 3 is a truncated cone structure with a top angle facing downward and a cone angle of 41.2°. A plurality of grooves 24 are provided on the outer wall of the upper support body 2 for reducing weight to prevent excessive gravity from affecting the cutting.

[0008] Furthermore, the busbar of the cone in the middle of the upper support body 2 is parallel to the third wire channel 32 and the third spare air guide channel 33, the first air vent 311, the second air vent 312 and the third air vent 313 are arranged closely to each other, and the angle between the third air guide channel 31 and the vertical line of the center of the laser cutting head body is 14.9°.

[0009] In some embodiments, the outer wall of the outer ring body 35 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, and the bottom inner ring of the locking ring 4 is provided with a circle of bosses 51, and the upper part of the ceramic ring 5 is provided with a circle of raised outer ring 42 folded outward, and matched with the outer ring body 35 of the lower cone, and the boss 51 is matched and abutted with the raised outer ring 42. After the locking ring 4 abuts against the ceramic ring 5, the locking ring 4 is locked with the lower support body 3 through threads, so that the ceramic ring 5 and the lower support body 3 can be detachably connected.

[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] In some embodiments, a second chamber 20 is disposed through the inner center of the upper support body 2, a third chamber 30 is disposed through the inner center of the lower support body 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.

[0012] Furthermore, the second chamber 20 and the upper part of the third chamber 30 form a cylindrical shape, the frustum formed in the middle of the third chamber 30 is similar to the frustum formed in the middle of the lower support body 3, and the upper bottom radius and the lower bottom radius in the cavity are smaller than the upper bottom radius and the lower bottom radius of the outer wall of the lower support body 3, and the lower part of the third chamber 30 is cylindrically arranged to avoid changes due to taper after direct laser irradiation.

[0013] Furthermore, the fourth chamber 50 is cylindrical, the top diameter of the fourth chamber 50 is smaller than the bottom diameter of the third chamber 30, and the bottom diameter of the fourth chamber 50 is larger than the top diameter 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 a truncated cone setting, 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 a dual gas path cooling system for a laser cutting head, including a laser cutting head body, the laser cutting head body including a conversion plate 1, an upper support body 2, a lower support body 3, a lock 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 a first air guide channel 11, a first wire channel 12 and a first spare air guide channel 13 are respectively provided near the first chamber 10 on the conversion plate 1, the first air guide channel 11, the first wire channel 12 and the first spare air guide channel 13 extend from the outer wall of the conversion plate 1 to the position near the first chamber 10, and the upper support body 2 penetrates the interior of the conversion plate 1. A second air guide channel 21, a second wire channel 22, and a second spare air guide channel 23 are provided. The output ends of the first air guide channel 11, the first wire channel 12, and the first spare air guide channel 13 are matched and connected to the input ends of the second air guide channel 21, the second wire channel 22, and the second spare air guide channel 23, respectively. A third air guide channel 31, a third wire channel 32, and a third spare air guide channel 33 are provided through the interior of the lower support body 3. The lower end of the third air guide channel 31 is provided with three branch holes, namely: a first air vent 311, a second air vent 312, and a third air vent 313. The first air vent 311, the second air vent 312, and the third air vent The input ends of 313 are all connected to the output ends of the third air guide channel 31, and their diameters are all smaller than the diameter of the third air guide channel 31. The input ends of the third air guide channel 31, the third wire channel 32 and the third backup air guide channel 33 are matched and connected to the output ends of the second air guide channel 21, the second wire channel 22 and the second backup air guide channel 23 respectively. The lower end of the lower support body 3 is detachably connected to the upper end of the ceramic ring 5 through the locking ring 4, and the ceramic ring 5 is detachably connected to the nozzle 6. The lower part of the lower support body 3 is provided with an inner ring body 34 and an outer ring body 35 protruding downward. The bottom of the inner ring body 34 and the top of the ceramic ring 5 are provided with a first gap, and the bottom of the outer ring body 35 is connected to the outer ring body 35. A second gap is provided between the bottom of the locking ring 4, and the output ends of the third wire channel 32 and the third spare air guide channel 33 extend to the bottom of the inner ring body 34 and are connected to the first gap. The output ends of the first air hole 311, the second air hole 312 and the third air hole 313 extend to the bottom of the outer ring body 35 and are connected to the second gap. A plurality of circular holes 41 are provided at the bottom of the ceramic ring 5. When the cooling gas flows in the laser cutting head body, the cooling gas in the second gap flows out through the circular holes 41 to cool the nozzle 6. The cooling gas in the first gap will directly cool the ceramic ring 5, thereby realizing double cooling of the nozzle 6 and the ceramic ring 5. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an exploded view of the overall structure of the dual gas path cooling system of the laser cutting head of the present application.

[0017] Figure 2 This is a schematic diagram of the overall structure of the dual gas path cooling system of the laser cutting head of the present application.

[0018] Figure 3 This is an exploded view of the local structure of the dual gas path cooling system of the laser cutting head of the present application.

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

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

[0021] Figure 6 This is a cross-sectional view of the dual gas path cooling system of the laser cutting head of the present application.

[0022] Figure 7 This is a cross-sectional view of the dual gas path cooling system of the laser cutting head of the present application.

[0023] Figure 8 This is a cross-sectional view of the dual gas path cooling system of the laser cutting head of the present application.

[0024] Main component symbols

[0025] Conversion plate 1, upper support body 2, lower support body 3, locking ring 4, ceramic ring 5, nozzle 6, first chamber 10, first air guide channel 11, first wire channel 12, first spare air guide channel 13, first mounting block 14, second mounting block 15, air path interface 141, line interface 151, second air guide channel 21, second wire channel 22, second spare air guide channel 23, third air guide channel 31, third wire channel 32, first air vent 311, second air vent 312, third air vent 313, third spare air guide channel 33, circular hole 41, boss 51, raised outer ring 42, second chamber 20, third chamber 30, fourth chamber 50, fifth chamber 60, groove 24, inner ring body 34, outer ring body 35.

[0026] The following specific implementation manner will further illustrate the present utility model in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0027] 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.

[0028] 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).

[0029] 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:

[0030] like Figure 1-8As shown, a dual gas path cooling system for a laser cutting head includes a laser cutting head body, which includes a conversion plate 1, an upper support body 2, a lower support body 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. The conversion plate 1 is provided with a first air guide channel 11, a first wire channel 12 and a first spare air guide channel 13 near the first chamber 10. The first air guide channel 11, the first wire channel 12 and the first spare air guide channel 13 extend from the outer wall of the conversion plate 1 to the position near the first chamber 10 respectively. A second air guide channel 21, a first wire channel 12 and a first spare air guide channel 13 are arranged through the interior of the upper support body 2. The second wire channel 22 and the second spare air guide channel 23, the output ends of the first air guide channel 11, the first wire channel 12 and the first spare air guide channel 13 are matched and connected to the input ends of the second air guide channel 21, the second wire channel 22 and the second spare air guide channel 23 respectively, the third air guide channel 31, the third wire channel 32 and the third spare air guide channel 33 are arranged through the inside of the lower support body 3, and the lower end of the third air guide channel 31 is provided with three branch holes, namely: the first air vent 311, the second air vent 312 and the third air vent 313, the input ends of the first air vent 311, the second air vent 312 and the third air vent 313 are all The output end of the third air guide channel 31 is connected to the output end of the third air guide channel 31, and its diameter is smaller than the diameter of the third air guide channel 31. The input ends of the third air guide channel 31, the third wire channel 32 and the third spare air guide channel 33 are matched and connected to the output ends of the second air guide channel 21, the second wire channel 22 and the second spare air guide channel 23 respectively. The lower end of the lower support body 3 is detachably connected to the upper end of the ceramic ring 5 through the locking ring 4, and the ceramic ring 5 is detachably connected to the nozzle 6. The lower part of the lower support body 3 is provided with an inner ring body 34 and an outer ring body 35 protruding downward. The bottom of the inner ring body 34 and the top of the ceramic ring 5 are provided with a first gap, and the bottom of the outer ring body 35 is connected to the bottom of the locking ring 4. A second gap is provided between the parts, the output ends of the third wire channel 32 and the third spare air guide channel 33 extend to the bottom of the inner ring body 34 and are connected to the first gap, the output ends of the first air hole 311, the second air hole 312 and the third air hole 313 extend to the bottom of the outer ring body 35 and are connected to the second gap, and a plurality of circular holes 41 are provided at the bottom of the ceramic ring 5. When the cooling gas flows in the laser cutting head body, the cooling gas in the second gap flows out through the circular holes 41 to cool the nozzle 6, and the cooling gas in the first gap will directly cool the ceramic ring 5, thereby realizing double cooling of the nozzle 6 and the ceramic ring 5.

[0031] In some embodiments, a first mounting block 14 and a second mounting block 15 are provided on the side wall of the conversion board 1, and the first mounting block 14 and the second mounting block 15 are both screwed to the side wall of the conversion board 1, and an air circuit interface 141 is provided inside the first mounting block 14, and the input end of the air circuit interface 141 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; a line interface 151 is provided inside the second mounting block 15, and the input end of the line interface 151 is connected to the external line, and the output end is matched and connected with the input end of the first wire channel 12, and the input end of the first backup air guide channel 13 is directly connected to the external cooling gas.

[0032] In some embodiments, the top of the upper support body 2 is matched and locked with the bottom of the conversion plate 1 by screws, the outer wall of the lower part of the upper support body 2 is provided with an external thread, and the inner wall of the upper part of the lower support body 3 is provided with an internal thread. The upper support body 2 and the lower support body 3 are matched and locked by threads. The upper support body 2 is a cylindrical structure, and the middle part of the lower support body 3 is a truncated cone structure with a top angle facing downward and a cone angle of 41.2°. A plurality of grooves 24 are provided on the outer wall of the upper support body 2 for reducing weight to prevent excessive gravity from affecting the cutting.

[0033] The busbar of the cone in the middle of the upper support body 2 is parallel to the third wire channel 32 and the third spare air channel 33. The first air hole 311, the second air hole 312 and the third air hole 313 are arranged closely to each other. The angle between the third air channel 31 and the vertical line of the center of the laser cutting head body is 14.9°.

[0034] In some embodiments, the outer wall of the outer ring body 35 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, and the bottom inner ring of the locking ring 4 is provided with a circle of bosses 51, and the upper part of the ceramic ring 5 is provided with a circle of raised outer ring 42 folded outward, and matched with the outer ring body 35 of the lower cone, and the boss 51 is matched and abutted with the raised outer ring 42. After the locking ring 4 abuts against the ceramic ring 5, the locking ring 4 is locked with the lower support body 3 through threads, so that the ceramic ring 5 and the lower support body 3 can be detachably connected.

[0035] 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 thread-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.

[0036] In some embodiments, a second chamber 20 is disposed through the inner center of the upper support body 2, a third chamber 30 is disposed through the inner center of the lower support body 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.

[0037] In some embodiments, the second chamber 20 and the upper part of the third chamber 30 form a cylindrical shape, the frustum formed in the middle of the third chamber 30 is similar to the frustum formed in the middle of the lower support body 3, and the upper bottom radius and the lower bottom radius in the cavity are smaller than the upper bottom radius and the lower bottom radius of the outer wall of the lower support body 3, and the lower part of the third chamber 30 is cylindrically set to avoid changes due to taper after direct laser irradiation.

[0038] The fourth chamber 50 is cylindrical, and the top diameter of the fourth chamber 50 is smaller than the bottom diameter of the third chamber 30. The bottom diameter of the fourth chamber 50 is larger than the top diameter 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 a truncated cone setting, 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.

[0039] 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 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.

[0040] Beneficial effects of the utility model: The utility model proposes a dual gas path cooling system for a laser cutting head, including a laser cutting head body, the laser cutting head body including a conversion plate 1, an upper support body 2, a lower support body 3, a lock 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 a first air guide channel 11, a first wire channel 12 and a first spare air guide channel 13 are respectively provided near the first chamber 10 on the conversion plate 1, the first air guide channel 11, the first wire channel 12 and the first spare air guide channel 13 extend from the outer wall of the conversion plate 1 to the position near the first chamber 10, and the upper support body 2 penetrates the interior of the conversion plate 1. A second air guide channel 21, a second wire channel 22, and a second spare air guide channel 23 are provided. The output ends of the first air guide channel 11, the first wire channel 12, and the first spare air guide channel 13 are matched and connected to the input ends of the second air guide channel 21, the second wire channel 22, and the second spare air guide channel 23, respectively. A third air guide channel 31, a third wire channel 32, and a third spare air guide channel 33 are provided through the interior of the lower support body 3. The lower end of the third air guide channel 31 is provided with three branch holes, namely: a first air vent 311, a second air vent 312, and a third air vent 313. The first air vent 311, the second air vent 312, and the third air vent The input ends of 313 are all connected to the output ends of the third air guide channel 31, and their diameters are all smaller than the diameter of the third air guide channel 31. The input ends of the third air guide channel 31, the third wire channel 32 and the third backup air guide channel 33 are matched and connected to the output ends of the second air guide channel 21, the second wire channel 22 and the second backup air guide channel 23 respectively. The lower end of the lower support body 3 is detachably connected to the upper end of the ceramic ring 5 through the locking ring 4, and the ceramic ring 5 is detachably connected to the nozzle 6. The lower part of the lower support body 3 is provided with an inner ring body 34 and an outer ring body 35 protruding downward. The bottom of the inner ring body 34 and the top of the ceramic ring 5 are provided with a first gap, and the bottom of the outer ring body 35 is connected to the outer ring body 35. A second gap is provided between the bottom of the locking ring 4, and the output ends of the third wire channel 32 and the third spare air guide channel 33 extend to the bottom of the inner ring body 34 and are connected to the first gap. The output ends of the first air hole 311, the second air hole 312 and the third air hole 313 extend to the bottom of the outer ring body 35 and are connected to the second gap. A plurality of circular holes 41 are provided at the bottom of the ceramic ring 5. When the cooling gas flows in the laser cutting head body, the cooling gas in the second gap flows out through the circular holes 41 to cool the nozzle 6. The cooling gas in the first gap will directly cool the ceramic ring 5, thereby realizing double cooling of the nozzle 6 and the ceramic ring 5.

[0041] 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 dual 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 support body (2), a lower support body (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), a first wire channel (12) and a first spare air guide channel (13) are respectively arranged on the conversion plate (1) near the first chamber (10); the first air guide channel (11), the first wire channel (12) and the first spare air guide channel (13) 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), a second wire channel (22) and a second spare air guide channel are respectively arranged inside the upper support body (2) (23), the output ends of the first air guide channel (11), the first wire channel (12) and the first spare air guide channel (13) are matched and connected to the input ends of the second air guide channel (21), the second wire channel (22) and the second spare air guide channel (23), respectively; the third air guide channel (31), the third wire channel (32) and the third spare air guide channel (33) are arranged through the interior of the lower support body (3); the lower end of the third air guide channel (31) is provided with three branch holes, namely: a first air vent (311), a second air vent (312) and a third air vent (313); the input ends of the first air vent (311), the second air vent (312) and the third air vent (313) are all connected to the third air guide channel ( The output end of the lower support body (31) is connected to the output end of the second air guide channel (21), the second wire channel (22) and the second spare air guide channel (23), and the diameters thereof are all smaller than the diameter of the third air guide channel (31); the input ends of the third air guide channel (31), the third wire channel (32) and the third spare air guide channel (33) are matched and connected to the output ends of the second air guide channel (21), the second wire channel (22) and the second spare air guide channel (23), respectively; the lower end of the lower support body (3) is detachably connected to the upper end of the ceramic ring (5) through a locking ring (4); the ceramic ring (5) is detachably connected to the nozzle (6); the lower part of the lower support body (3) is provided with an inner ring body (34) and an outer ring body (35) protruding downward; a first gap is provided between the bottom of the inner ring body (34) and the top of the ceramic ring (5); the bottom of the outer ring body (35) and the locking ring (4) are connected in a manner similar to that of the lower support body (3). A second gap is provided between the bottoms; the output ends of the third wire channel (32) and the third spare air guide channel (33) extend to the bottom of the inner ring body (34) and are in communication with the first gap; the output ends of the first vent hole (311), the second vent hole (312) and the third vent hole (313) extend to the bottom of the outer ring body (35) and are in communication with the second gap; a plurality of circular holes (41) are provided at the bottom of the ceramic ring (5); when cooling gas flows in the laser cutting head body, the cooling gas in the second gap flows out through the circular holes (41) to cool the nozzle (6); the cooling gas in the first gap will directly cool the ceramic ring (5), thereby achieving dual cooling of the nozzle (6) and the ceramic ring (5).

2. The dual gas path cooling system for a laser cutting head according to claim 1, characterized in that: A first mounting block (14) and a second mounting block (15) are provided on the side wall of the conversion plate (1); the first mounting block (14) and the second mounting block (15) are both screwed to the side wall of the conversion plate (1); a gas path interface (141) is provided inside the first mounting block (14); an input end of the gas path interface (141) is connected to external cooling gas, and an output end is matched and communicated with an input end of the first air guide channel (11); a line interface (151) is provided inside the second mounting block (15); an input end of the line interface (151) is connected to an external line, and an output end is matched and communicated with an input end of the first wire channel (12); and an input end of the first standby air guide channel (13) is directly connected to external cooling gas.

3. The dual gas path cooling system for a laser cutting head according to claim 1, characterized in that: The top of the upper support body (2) is matched and locked with the bottom of the conversion plate (1) by screws, the outer wall of the lower part of the upper support body (2) is provided with an external thread, and the inner wall of the upper part of the lower support body (3) is provided with an internal thread. The upper support body (2) and the lower support body (3) are matched and locked by threads. The upper support body (2) is a cylindrical structure, and the middle part of the lower support body (3) is a truncated cone structure with a top angle downward and a cone angle of 41.2°. A plurality of grooves (24) are provided on the outer wall of the upper support body (2) for reducing weight and preventing excessive gravity from affecting cutting.

4. The dual gas path cooling system for a laser cutting head according to claim 1, characterized in that: The busbar of the central cone of the upper support body (2) is parallel to the third wire channel (32) and the third spare air guide channel (33); the first air vent (311), the second air vent (312) and the third air vent (313) are arranged closely to each other; and the angle formed by the third air guide channel (31) and the vertical line at the center of the laser cutting head body is 14.9°.

5. The dual gas path cooling system for a laser cutting head according to claim 1, characterized in that: The outer wall of the outer ring body (35) 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 (51), the upper part of the ceramic ring (5) is provided with a circle of outwardly folded raised outer ring (42), and the raised outer ring (42) is matched and abutted with the outer ring body (35) of the lower cone, and the bosses (51) and the raised outer ring (42) are matched and abutted, and after the locking ring (4) and the ceramic ring (5) are abutted, the locking ring (4) is locked with the lower support body (3) through the threads, so that the ceramic ring (5) and the lower support body (3) are detachably connected.

6. The dual 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) during cutting.

7. The dual gas path cooling system for a laser cutting head according to claim 1, characterized in that: A second chamber (20) is provided at the center of the interior of the upper support body (2), a third chamber (30) is provided at the center of the interior of the lower support body (3), a fourth chamber (50) is provided at the center of the interior of the ceramic ring (5), and a fifth chamber (60) is provided at the center of the interior 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 dual gas path cooling system for a laser cutting head according to claim 7, characterized in that: The second chamber (20) and the upper part of the third chamber (30) are cylindrical, the frustum formed in the middle of the third chamber (30) is similar to the frustum formed in the middle of the lower support body (3), and the upper bottom radius and the lower bottom radius in the chamber are smaller than the upper bottom radius and the lower bottom radius of the outer wall of the lower support body (3), and the lower part of the third chamber (30) is cylindrical to avoid changes in taper after direct laser irradiation.

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

10. The dual 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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