A nozzle holder head and a compound nozzle for laser flame hybrid cutting
By adopting a split nozzle fixing head structure consisting of a ceramic fixing head and a connector in the laser flame cutting equipment, the problem of cutting head damage caused by the collision between the nozzle head and the workpiece is solved, thereby reducing maintenance and replacement costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUHAN PENTA CHUTIAN LASER EQUIP
- Filing Date
- 2026-05-29
- Publication Date
- 2026-07-21
AI Technical Summary
In laser flame cutting equipment, when the nozzle head collides at high speed with the workpiece surface or the molten slag, the impact energy is directly transferred to the cutting head body, causing it to be scrapped and resulting in high repair or replacement costs.
The nozzle fixing head adopts a split nozzle fixing head structure consisting of a ceramic fixing head and a connector. The nozzle head is connected to the cutting head body through the ceramic fixing head. In the event of a violent collision, the ceramic fixing head will brittlely fracture to absorb the impact energy and prevent it from being transmitted to the cutting head body. Only the ceramic fixing head needs to be replaced.
It effectively protects the main body of the cutting head, reduces maintenance and replacement costs, and improves the reliability and economy of the equipment.
Smart Images
Figure CN224526228U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of laser welding technology, specifically relating to a nozzle fixing head and a composite nozzle for laser flame composite cutting. Background Technology
[0002] In laser flame cutting equipment, the cutting head is the core execution component. A conventional cutting head structure usually includes a cutting head body and a nozzle head, which delivers the gas required for laser and flame combustion through the cutting head body and ejects it through the nozzle head.
[0003] During high-speed cutting of thin plates or processing of warped or deformed plates, the nozzle head is highly susceptible to high-speed collisions with the workpiece surface or molten slag due to unevenness of the plate, deviations in the program path, or lag in the follow-up system response. Because the nozzle head and the cutting head body have a rigid metal-to-metal connection, once a collision occurs, the instantaneous impact energy is transmitted almost without attenuation directly to the precision components within the cutting head body above it. Excessive impact force can render the entire cutting head unusable, resulting in high repair or replacement costs. Utility Model Content
[0004] In view of one or more of the above-mentioned defects or improvement needs of the prior art, this utility model provides a nozzle fixing head and a composite nozzle for laser flame composite cutting, which can protect the main body of the cutting head when the cutting head collides violently with the plate.
[0005] To achieve the above objectives, one aspect of this utility model provides a nozzle fixing head for laser flame composite cutting, which includes a ceramic fixing head and a connector;
[0006] The ceramic fixing head includes a first through hole in the middle and first air holes spaced apart outside the first through hole; one end of the ceramic fixing head can be connected to the cutting head body, and the other end can be connected to the connector.
[0007] The connector includes a second through hole in the middle and a second air hole spaced apart outside the second through hole. The second through hole communicates with the first through hole, and the second air hole communicates with the first air hole. The connector can be connected to the nozzle head.
[0008] As a further improvement of this invention, the fracture toughness of the ceramic fixing head is 2~6 MPa·m. 1 / 2 .
[0009] As a further improvement of this utility model, the ceramic fixing head is also provided with a receiving hole, and a conductive copper pillar is embedded in the receiving hole. The conductive copper pillar can be connected to the capacitor height adjustment sensor in the cutting head body.
[0010] As a further improvement of this utility model, the first vent is an annular hole spaced apart outside the first through hole; and / or, the second vent is an annular hole spaced apart outside the second through hole.
[0011] As a further improvement of this utility model, the first air hole is provided as a plurality of the first air holes, which are spaced apart circumferentially along the outer periphery of the first through hole; and / or, the second air hole is provided as a plurality of the second air holes, which are spaced apart circumferentially along the outer periphery of the second through hole.
[0012] As a further improvement of this utility model, a convex ring is provided at one end of the connector near the ceramic fixing head, and the outer wall of the convex ring is threadedly connected to the inner wall of the first through hole.
[0013] In another aspect, this utility model provides a composite nozzle for laser flame composite cutting, including the above-mentioned nozzle fixing head, and also including a nozzle head, wherein the nozzle head is connected to one end of the connector opposite to the ceramic fixing head.
[0014] As a further improvement of this utility model, the nozzle head includes an inner cylinder and an outer cylinder coaxially sleeved together. The inner cylinder communicates with the second through hole, and an annular cavity is formed between the inner wall of the outer cylinder and the inner wall of the inner cylinder. The annular cavity communicates with the second air hole.
[0015] As a further improvement of this utility model, the outer cylinder includes a conical section and a straight section, the conical section is disposed on the side close to the connector, and the inner diameter of the conical section gradually decreases from one end close to the connector to the other end;
[0016] And / or, the inner cylinder is provided with a stepped through hole, the stepped through hole including a first circular hole, a conical hole and a second circular hole connected in sequence, the first circular hole is provided on the side close to the connector, and the inner diameter of the first circular hole is larger than the inner diameter of the second circular hole.
[0017] As a further improvement of this utility model, a plurality of channels are evenly spaced along the circumferential direction on the outer peripheral wall of the inner cylinder at the end opposite to the connector, and the extending direction of the plurality of channels is parallel to the extending direction of the inner cylinder.
[0018] The aforementioned improved technical features can be combined with each other as long as they do not conflict with each other.
[0019] In summary, the beneficial effects of the above-described technical solutions conceived by this utility model compared with the prior art include:
[0020] (1) The nozzle fixing head and composite nozzle of this utility model for laser flame composite cutting are installed on the cutting head body by using the nozzle fixing head, and a ceramic fixing head is set in the nozzle fixing head so that when the cutting head malfunctions and the plate is violently impacted, the ceramic fixing head can undergo brittle fracture, thereby actively absorbing and blocking the transmission path of impact energy, effectively avoiding the impact force from being transmitted to the cutting head body, preventing the entire cutting head from being damaged by impact, and reducing the risk of damage to the core components of the cutting head.
[0021] (2) The nozzle fixing head and composite nozzle for laser flame composite cutting of this utility model are constructed as a split structure, that is, composed of a ceramic fixing head, a connecting section and a nozzle head connected in sequence. In the event of a severe impact that causes the ceramic fixing head to fracture brittlely, only the ceramic fixing head needs to be replaced, while the connecting section and the nozzle head can be reused, which effectively reduces the replacement cost. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0023] Figure 1 This is a cross-sectional schematic diagram of the composite nozzle used for laser-flame composite cutting in an embodiment of this utility model;
[0024] Figure 2 This is a schematic diagram of the overall structure of the composite nozzle used for laser-flame composite cutting in an embodiment of this utility model;
[0025] Figure 3 This is a schematic diagram of the cross-sectional structure of the nozzle fixing head used for laser flame composite cutting in this embodiment of the present invention;
[0026] Figure 4 This is a schematic diagram of the overall structure of the nozzle fixing head used for laser flame composite cutting in this embodiment of the present invention;
[0027] Figure 5 This is a cross-sectional schematic diagram of the inner cylinder of the nozzle head in an embodiment of this utility model;
[0028] Figure 6 This is a schematic diagram of the overall structure of the nozzle head inner cylinder in an embodiment of this utility model;
[0029] Figure 7 This is a cross-sectional schematic diagram of the nozzle head outer cylinder in an embodiment of this utility model;
[0030] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1. Ceramic fixing head; 101. First through hole; 102. First vent; 103. Conductive copper pillar; 104. Accommodating hole; 2. Connector; 201. Second through hole; 202. Second vent; 203. Protruding ring; 3. Nozzle head; 301. Inner cylinder; 3011. First circular hole; 3012. Conical hole; 3013. Second circular hole; 3014. Channel; 302. Outer cylinder; 3021. Conical section; 3022. Straight section; 303. Annular cavity. Detailed Implementation
[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.
[0032] In the description of this utility model, it should be understood that, unless otherwise explicitly specified and limited, the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0033] Furthermore, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.
[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0035] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0036] Example:
[0037] Please see Figures 1-7 In a preferred embodiment of this utility model, the nozzle fixing head for laser flame composite cutting includes a ceramic fixing head 1 and a connector 2 connected to each other, so as to connect the ceramic fixing head 1 to the cutting head body and the connector 2 to the nozzle head 3, thereby fixing the nozzle head 3 to the cutting head body.
[0038] It should be noted that the laser flame composite cutting head has a laser delivery channel in the middle and a gas delivery channel on the outer ring. The laser is delivered to the composite nozzle through the laser delivery channel, and the gas mixture of gas and oxygen is delivered to the composite nozzle to output the flame through the gas delivery channel. This is existing technology and will not be elaborated here.
[0039] Specifically, such as Figure 3 As shown, in the preferred embodiment, the ceramic fixing head 1 is made of ceramic, with one end detachably connected to the cutting head body and the other end detachably connected to the connector 2. The ceramic fixing head 1 includes a first through hole 101 located in the middle and first air holes 102 spaced apart outside the first through hole 101; wherein, the first through hole 101 is used to communicate with the laser delivery channel of the cutting head body to deliver laser; the first air hole 102 is used to communicate with the gas delivery channel of the cutting head body to deliver a mixture of fuel gas and oxygen.
[0040] In specific embodiments of this utility model, such as Figure 4As shown, multiple first vents 102 are provided, and the multiple first vents 102 are evenly spaced around the outer periphery of the first through hole 101. In another specific embodiment of this utility model, the first vents 102 may also be annular holes spaced around the outer periphery of the first through hole 101.
[0041] Preferably, a receiving hole 104 is also provided in the ceramic fixing head 1, and a conductive copper pillar 103 is embedded in the receiving hole 104. The conductive copper pillar 103 can be connected to the capacitor height adjustment sensor in the cutting head body after the ceramic fixing head 1 is installed on the cutting head body, so as to form a capacitor structure with the metal plate through the conductive copper pillar 103. When the ceramic fixing head 1 with conductive copper pillar 103 moves up and down relative to the metal plate, the capacitance of the capacitor will change accordingly. The capacitor height adjustment sensor can detect the change in capacitance and calculate the relative distance between the conductive copper pillar 103 and the plate, so as to achieve precise control of the cutting head position.
[0042] Furthermore, in the preferred embodiment, the connector 2 is made of stainless steel, with one end detachably connected to the ceramic fixing head 1 and the other end detachably connected to the nozzle head 3. The connector 2 includes a second through hole 201 and a plurality of second air holes 202; wherein the second through hole 201 communicates with the first through hole 101 to deliver the laser to the nozzle head 3 for output; the second air holes 202 are correspondingly connected to the first air holes 102 to deliver the mixed gas to the nozzle head 3 for flame emission.
[0043] In a specific embodiment of this utility model, multiple second vents 202 are provided, and the multiple second vents 202 are evenly spaced around the outer periphery of the second through hole 201. In another specific embodiment of this utility model, the second vents 202 may also be annular holes spaced around the outer periphery of the second through hole 201.
[0044] It is understandable that, in actual configuration, the first vent 102 and the second vent 202 can be configured such that the annular first vent 102 matches the annular second vent 202; or the annular first vent 102 matches a plurality of circumferentially spaced second vents 202, with the plurality of second vents 202 simultaneously connected to the annular first vent 102; or the plurality of first vents 102 matches the annular second vent 202, with the plurality of first vents 102 simultaneously connected to the annular second vent 202; or the plurality of first vents 102 matches the plurality of second vents 202, with the plurality of first vents 102 and the plurality of second vents 202 corresponding one-to-one and connected.
[0045] Preferably, such as Figure 3As shown, for the detachable connection between the connector 2 and the ceramic fixing head 1, a protruding ring 203 is provided at one end of the connector 2 near the ceramic fixing head 1. The protruding ring 203 extends into the first through hole 101, and its outer wall is threadedly connected to the inner wall of the first through hole 101.
[0046] More preferably, pin holes are respectively provided on the connector 2 and the ceramic fixing head 1 to further connect the connector 2 and the ceramic fixing head 1 by means of pins, and to circumferentially limit the connector 2 and the ceramic fixing head 1 to prevent the connector 2 from separating from the ceramic fixing head 1 due to loosening of the threads during use.
[0047] It is understandable that by mounting the nozzle head 3 on the cutting head body through the nozzle fixing head, in the event of a severe collision between the cutting head and the plate during operation, the ceramic fixing head 1 will undergo brittle fracture, preventing the impact force from being transmitted to the cutting head body and causing overall damage to the cutting head body. Only the ceramic fixing head 1 needs to be replaced for normal use, effectively reducing maintenance and replacement costs.
[0048] Preferably, the ceramic fixing head 1 is made of alumina ceramic, silicon carbide ceramic, or other materials with a fracture toughness of 2~6 MPa·m. 1 / 2 The brittle ceramic material can meet the structural strength requirements of normal cutting operations, and can effectively absorb impact energy through its own brittle fracture when a violent impact occurs, thereby protecting the main body of the cutting head.
[0049] Furthermore, this utility model also relates to a composite nozzle for laser flame composite cutting, including the aforementioned nozzle fixing head and nozzle head 3; wherein, the nozzle head 3 is detachably connected to the end of the connector 2 facing away from the ceramic fixing head 1, and the nozzle head 3 can be an existing nozzle head structure, or it can be as follows: Figure 1 and Figure 2 The nozzle head 3 in the preferred embodiment.
[0050] like Figure 1 As shown, in the preferred embodiment, the nozzle head 3 includes an inner cylinder 301 and an outer cylinder 302 coaxially sleeved; wherein the inner cylinder 301 is connected to the second through hole 201 to output laser through the inner cylinder 301; an annular cavity 303 is formed between the inner wall of the outer cylinder 302 and the outer wall of the inner cylinder 301, and the annular cavity 303 is connected to the second air hole 202 to eject flame through the annular cavity 303.
[0051] More specifically, such as Figure 5As shown, the inner cylinder 301 is provided with a stepped through hole, which includes a first circular hole 3011, a conical hole 3012 and a second circular hole 3013 connected in sequence. The first circular hole 3011 is located on the side close to the connector 2, and the inner diameter of the first circular hole 3011 is larger than the inner diameter of the second circular hole 3013. The inner diameters of the two ends of the conical hole 3012 are the same as those of the first circular hole 3011 and the second circular hole 3013, respectively, so as to transition through the conical hole 3012 to change the diameter, thereby increasing the energy density of the laser and enhancing the cutting ability through the stepped through hole with the changed diameter.
[0052] Preferably, such as Figure 6 As shown, multiple channels 3014 are evenly spaced along the circumference on the outer peripheral wall of the inner cylinder 301 away from the connector 2. The extension direction of the multiple channels 3014 is parallel to the extension direction of the inner cylinder 301, so as to optimize the gas flow direction of the oxygen and fuel gas mixture, maintain the stability of airflow speed and pressure, improve the uniformity of the flame distribution, and make the flame ejected through the nozzle head 3 converge as a whole, thereby improving the quality of laser flame composite cutting.
[0053] At the same time, such as Figure 7 As shown, the outer cylinder 302 includes a conical section 3021 and a straight section 3022; wherein, the conical section 3021 is disposed on the side near the connector 2, and the inner diameter of the conical section 3021 gradually decreases from one end near the connector 2 to the other end, so that the width of the annular cavity 303 between the outer cylinder 302 and the inner cylinder 301 gradually decreases from one end to the other end, so as to increase the output pressure of the flame gas; the inner diameter of the straight section 3022 remains unchanged and is the same as the minimum inner diameter of the conical section 3021.
[0054] Preferably, for the detachable connection between the connector 2 and the nozzle head 3, external threads are respectively provided on the outer peripheral wall of the inner cylinder 301 near the connector 2 and on the outer peripheral wall of the connector 2 near the nozzle head 3, and internal threads are respectively provided on the inner peripheral wall of the second through hole 201 near the nozzle head 3 and on the inner peripheral wall of the outer cylinder 302 near the connector 2, so as to thread one end of the inner cylinder 301 to the second through hole 201 and thread one end of the connector 2 to the inner wall of the outer cylinder 302.
[0055] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A nozzle fixing head for laser-flame composite cutting, characterized in that, Includes ceramic mounting heads and connectors; The ceramic fixing head includes a first through hole in the middle and first air holes spaced apart outside the first through hole; one end of the ceramic fixing head is connected to the cutting head body and the other end is connected to the connector. The connector includes a second through hole in the middle and a second air hole spaced apart outside the second through hole. The second through hole communicates with the first through hole, and the second air hole communicates with the first air hole. The connector is used to connect to the nozzle head.
2. The nozzle fixing head for laser-flame composite cutting according to claim 1, characterized in that, The fracture toughness of the ceramic fixing head is 2~6 MPa·m. 1 / 2 .
3. The nozzle fixing head for laser-flame composite cutting according to claim 1, characterized in that, The ceramic fixing head is also provided with a receiving hole, and a conductive copper pillar is embedded in the receiving hole. The conductive copper pillar is connected to the capacitor height adjustment sensor in the cutting head body.
4. The nozzle fixing head for laser-flame composite cutting according to claim 1, characterized in that, The first vent is an annular hole spaced apart outside the first through hole; and / or, the second vent is an annular hole spaced apart outside the second through hole.
5. The nozzle fixing head for laser-flame composite cutting according to claim 1, characterized in that, The first air hole is configured as a plurality of holes, which are spaced apart circumferentially along the outer periphery of the first through hole; and / or, the second air hole is configured as a plurality of holes, which are spaced apart circumferentially along the outer periphery of the second through hole.
6. The nozzle fixing head for laser-flame composite cutting according to claim 1, characterized in that, The connector has a protruding ring at one end near the ceramic fixing head, and the outer wall of the protruding ring is threaded to the inner wall of the first through hole.
7. A composite nozzle for laser-flame composite cutting, characterized in that, The nozzle fixing head includes any one of claims 1 to 6, and further includes a nozzle head connected to one end of the connector away from the ceramic fixing head.
8. The composite nozzle for laser-flame composite cutting according to claim 7, characterized in that, The nozzle head includes an inner cylinder and an outer cylinder coaxially sleeved together. The inner cylinder communicates with the second through hole. An annular cavity is formed between the inner wall of the outer cylinder and the outer wall of the inner cylinder. The annular cavity communicates with the second air hole.
9. The composite nozzle for laser-flame composite cutting according to claim 8, characterized in that, The outer cylinder includes a conical section and a straight section. The conical section is located on the side close to the connector, and the inner diameter of the conical section gradually decreases from one end close to the connector to the other end. And / or, the inner cylinder is provided with a stepped through hole, the stepped through hole including a first circular hole, a conical hole and a second circular hole connected in sequence, the first circular hole is provided on the side close to the connector, and the inner diameter of the first circular hole is larger than the inner diameter of the second circular hole.
10. The composite nozzle for laser-flame composite cutting according to claim 8, characterized in that, Multiple channels are evenly spaced along the circumferential direction on the outer peripheral wall of the inner cylinder at the end opposite to the connector, and the extending direction of the multiple channels is parallel to the extending direction of the inner cylinder.