Coaxial positioning connection structure, nozzle, nozzle module, nozzle fixing component, laser processing head and laser processing device

Abstract

This utility model discloses a coaxial positioning connection structure, a nozzle, a nozzle module, a nozzle fixing component, a laser processing head, and a laser processing device. The coaxial positioning connection structure achieves axial positioning through spaced first and second positioning parts. The first positioning part and a first positioning mating part achieve axial positioning, while multiple second positioning mating parts abut against the second positioning part, generating a radial force on the first part, thus ensuring that the first and second parts are highly coaxially arranged. The first and second positioning parts form a dual positioning constraint, resulting in high positioning accuracy and strong stability. This ensures that the laser beam and auxiliary gas are coaxially aligned with the nozzle output, improving the quality and efficiency of laser processing.

Description

Technical Field

[0001] This utility model relates to the field of laser processing technology, and in particular to a coaxial positioning connection structure, a nozzle, a nozzle module, a nozzle fixing component, a laser processing head, and a laser processing device. Background Technology

[0002] In the precision and high-efficiency manufacturing field of laser processing, the nozzle, as a key component, plays a crucial role in the processing and final quality. However, in the current nozzle manufacturing process, consistency issues have become a key factor restricting the improvement of processing accuracy and stability.

[0003] From a manufacturing process perspective, despite the continuous advancement of modern manufacturing technology, when mass-producing nozzles, the interplay of various factors, such as slight differences in processing equipment, fluctuations in processing parameters, and subtle changes in the properties of raw materials, makes it difficult to ensure that every nozzle meets the exact same specifications and precision standards. This results in fluctuations in key dimensions such as the nozzle's inner diameter, length, and taper within a certain range, leading to significant differences between nozzles.

[0004] When these differentiated nozzles are mounted on a laser processing head, misalignment between the nozzle and the laser beam can easily occur. This problem negatively impacts the laser processing process in several ways. For example, in cutting or welding processes, when the nozzle and laser beam are misaligned, the direction of the auxiliary gas ejected from the nozzle deviates, preventing it from achieving ideal synergy with the laser beam. The auxiliary gas cannot be evenly distributed across the processing area, leading to reduced processing quality. Utility Model Content

[0005] This invention provides a coaxial positioning connection structure, a nozzle, a nozzle module, a nozzle fixing component, a laser processing head, and a laser processing device to achieve coaxiality between the nozzle and the laser beam in the laser processing head, thereby improving the output quality of the laser beam and auxiliary gas.

[0006] Firstly, a coaxial positioning connection structure includes: The first part has a first positioning part and a second positioning part spaced apart, and the first part has a first guide channel arranged along its axial direction; The positioning connection assembly includes a plurality of second positioning mating parts arranged at intervals around the central axis of the first guide channel, with each second positioning mating part corresponding to a second positioning part. The second part has a first positioning mating part connected to the first positioning part, and the second part has a second guide channel arranged along its axial direction. The second positioning mating part can radially abut against the second positioning part under the assembly force of the first positioning part and the first positioning mating part, so that the first part and the second part are arranged coaxially.

[0007] In one embodiment, the coaxial positioning connection structure has a receiving cavity; The inner wall of the receiving cavity includes a first abutting portion and a second abutting portion, both of which are inclined surfaces; The first abutting part is inclined toward the second positioning part, and the second abutting part is inclined away from the second positioning part; During the assembly process of the first positioning part and the first positioning mating part, the second positioning mating part slides along the first abutting part under the action of the second abutting part and abuts radially against the second positioning part.

[0008] In one embodiment, the first part includes a first body and a second body that are nested together, a first positioning part is disposed on the first body, a receiving cavity is disposed on the first part, and a first guiding channel is disposed on the second body.

[0009] In one embodiment, the first positioning and mating part is disposed on the second part, the second positioning part is disposed on the second body, and the receiving cavity is disposed on the first body.

[0010] In one embodiment, the first positioning and mating part is disposed on the second part, the second positioning part is disposed on the first body or the second part, and the second body is provided with a receiving cavity.

[0011] In one embodiment, at least one sealing element is provided in the assembly gap between the first part and the second part so that the first guide channel and the second guide channel form a closed laser beam guide channel.

[0012] In one embodiment, the second positioning part is a groove; The second positioning and mating part is configured with ball bearings; Alternatively, the second positioning mating part is configured as a connected elastic element and a positioning post, with the end of the positioning post facing away from the elastic element having a curved surface or a chamfer; Alternatively, the ball bearings may be configured as a connected elastic element and ball bearings; The elastic element applies a resisting force to the ball toward the second positioning part.

[0013] In one embodiment, the first positioning part is configured as a thread, a magnetic component, a snap-fit, or a fastener, and the first positioning mating part is correspondingly configured as a threaded engagement part, a magnetic engagement part, a snap-fit ​​part, or a fastener connection hole.

[0014] In one embodiment, the second part contains at least one of a focusing device, a collimating device, a protective mirror, a beam shaping device, a laser transmission tube, and a cooling device.

[0015] According to one aspect of the present invention, a nozzle is provided, the nozzle being provided with a second positioning part or a receiving cavity, the second positioning part or the receiving cavity being used to accommodate a plurality of second positioning mating parts and being sleeved on a first body through the second positioning mating parts, the first body being provided with a first positioning part, the first positioning part being used to connect with the first positioning mating part of the second part; The nozzle is also provided with a first guide channel arranged along its axial direction, and a plurality of second positioning mating parts are arranged at intervals around the central axis of the first guide channel; The second positioning mating part can radially abut against the second positioning part or the receiving cavity under the assembly force of the first positioning part and the second part, so that the nozzle and the second part are arranged coaxially.

[0016] According to one aspect of the present invention, a nozzle module is provided, the nozzle module comprising: The first body and the second body are nested together. The nozzle module is provided with a first positioning part and a second positioning part spaced apart. The nozzle module has a first guide channel arranged along its axial direction. The first positioning part is used to connect with the first positioning mating part of the second body. The positioning connection assembly includes a plurality of second positioning mating parts arranged at intervals around the central axis of the first guide channel; The second positioning part is used to accommodate the second positioning mating part in a one-to-one correspondence. The second positioning mating part can radially abut against the second positioning part under the assembly force of the first positioning part and the second part, so that the second body and the second part are arranged coaxially.

[0017] According to one aspect of the present invention, a nozzle fixing member is provided. The nozzle fixing member is provided with a second positioning part or a receiving cavity. The second positioning part or the receiving cavity is used to accommodate a plurality of second positioning mating parts and to sleeve a second body therein through the second positioning mating parts. The nozzle fixing member is provided with a first positioning part, which is used to connect with the first positioning mating part of the second part. The second body is also provided with a first guide channel arranged along its axial direction, and a plurality of second positioning and mating parts are arranged at intervals around the central axis of the first guide channel; The second positioning mating part can radially abut against the second positioning part or the receiving cavity under the assembly force of the first positioning part and the second part, so that the nozzle and the second part are arranged coaxially.

[0018] According to one aspect of the present invention, a laser processing head is provided, including the coaxial positioning connection structure of the above-described solution.

[0019] According to one aspect of the present invention, a laser processing apparatus is provided, including the laser processing head of the above-described scheme.

[0020] The technical solution of this utility model embodiment uses a first positioning part and a second positioning part with intervals. The first positioning part and the first positioning mating part achieve axial positioning. Multiple second positioning mating parts abut against the second positioning part, generating a radial force on the first part, making the first and second parts coaxially arranged. The first positioning part (axial positioning connection) and the second positioning part (radial positioning connection) form a dual positioning constraint, resulting in high positioning accuracy and strong stability. This ensures that the laser beam and auxiliary gas are coaxially aligned with the nozzle output, improving the quality and efficiency of laser processing.

[0021] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of 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 based on these drawings without creative effort.

[0023] Figure 1 It is a cross-sectional schematic diagram showing the first body, the second part, and the first part nested together from the outside to the inside; Figure 2a This is a cross-sectional view of the first part and the first body in the locked state, with the first part having a step. Figure 2b This is a cross-sectional view of the first part and the first body not being completely separated, and the first part having a step. Figure 2c This is a cross-sectional view of the first part and the first body in a completely separated state; Figure 3a It is a cross-sectional diagram showing the second part, the first body, and the second body nested together from the outside in. Figure 3b This is a cross-sectional schematic diagram showing the second positioning part located on the first body; Figure 4 It is a cross-sectional schematic diagram showing the first body, the second body, and the second part nested together from the outside to the inside; Figure 5 This is a cross-sectional schematic diagram of the assembly of the first and second bodies; Figure 6 This is an assembly diagram of the second positioning and mating part, including the balls and elastic components; Figure 7 This is an assembly diagram of the second part, the first body, the ball bearings, and the elastic components; Figure 8 This is a magnified view of the cavity details.

[0024] Figure label: 1. First part; 10. First body; 13. Second body; 130. Step; 100. First guide channel; 101. Receiving cavity; 1010. First abutting part; 1011. Second abutting part; 11. First positioning part; 12. Second positioning part; 120. Third abutting part; 2. Second part; 21. Second positioning mating part; 20. First positioning mating part; 201. Elastic element; 200. Second guide channel; 3. Sealing element. Detailed Implementation

[0025] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0026] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus. Embodiments of this utility model are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0027] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are 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.

[0028] 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] like Figure 1-8 As shown, the coaxial positioning connection structure includes a first part 1 and a second part 2 connected to each other. The second part 2 and the first part 1 are any two connected components or assemblies on the laser processing head that have coaxial positioning requirements.

[0030] Specifically, the first part 1 has a first positioning part 11 and a second positioning part 12 spaced apart, and the first part 1 has a first guide channel 100 inside. The second part 2 has a first positioning mating part 20 connected to the first positioning part 11, and the second part 2 has a second guide channel 200 inside. When applied to the field of laser processing, the first guide channel 100 and the second guide channel 200 are configured for transmitting a laser beam and / or transmitting auxiliary gas.

[0031] The positioning connection component includes multiple second positioning mating parts 21.

[0032] The second positioning mating part 21 and the second positioning part 12 are respectively arranged at intervals around the central axis of the first guide channel 100, and the second positioning part 12 is used to accommodate the second positioning mating part 21 in a one-to-one correspondence. During assembly, the first positioning part 11 is connected to the first positioning mating part 20, and the second positioning mating part 21 can be driven to slide radially against the second positioning part 12 under the assembly force of the first positioning part 11 and the first positioning mating part 200, so that the first guide channel 100 and the second guide channel 200 are simultaneously subjected to forces in the axial and radial directions, so that the two are arranged coaxially to achieve coaxial assembly of the inner cavity between the first part 1 and the second part 2, that is, to achieve coaxial transmission of the laser beam.

[0033] In summary, this application establishes a first positioning part 11 and a second positioning part 12 spaced apart in the first part 1. The first positioning part 11 forms an axial positioning connection with the first positioning mating part 20 (threaded engagement part) of the first part 2. Simultaneously, multiple circumferentially distributed second positioning mating parts 21 abut against the second positioning parts 12, applying radial positioning constraints to the first part 1. This technical solution forms a dual positioning mechanism through the axial positioning structure of the first positioning part 11 and the radial positioning structure of the second positioning part 12. Utilizing the tensile strength of axial positioning and the offset resistance of radial positioning, a high-precision coaxial positioning connection is achieved, significantly improving structural stability. This dual positioning design effectively reduces coaxial deviation during laser processing, ensuring the accuracy of the beam transmission path from a mechanical structural perspective, thereby significantly improving the quality consistency and operational efficiency of laser processing.

[0034] In one embodiment, the second positioning mating part 21 and the second positioning part 12 are provided in a one-to-one correspondence, and there are multiple second positioning mating parts 21. These include two or more second positioning mating parts 21.

[0035] This connection method can effectively eliminate coaxiality deviation caused by errors in a single positioning point, reducing coaxiality error by more than 50% compared to a single positioning structure.

[0036] On the other hand, the increased contact area allows it to withstand greater axial and radial loads. During laser processing, when the laser processing head needs to rotate at high speed or withstand large cutting forces, multiple positioning points can effectively distribute the load, preventing individual positioning points from failing due to overload and ensuring stable operation of the laser processing head under high load conditions.

[0037] Furthermore, the multiple second positioning mating parts 21 can assist in alignment, reducing assembly difficulty. Even if there is a certain angular deviation or positional error during assembly, the mating of multiple positioning points can achieve automatic correction through mutual adjustment, enabling the first part 1 and the second part 2 to successfully complete coaxial positioning.

[0038] In one embodiment, the second positioning part 12 is a groove; the second positioning mating part 21 is configured as a ball; the ball slides against the inside of the groove.

[0039] In one embodiment, the second positioning mating part 21 includes a connection structure between the elastic element 201 and the positioning post, wherein the end of the positioning post away from the elastic element 201 is provided with a curved surface, chamfer, or ball head structure. The construction form of this positioning mating part is equivalent to the spring pin positioning structure in the prior art. Through the deformation compensation mechanism of the elastic element and the arc-shaped guide structure at the end of the positioning post, the adaptive alignment and buffer abutment function in the radial positioning process are realized.

[0040] In one embodiment, such as Figure 6 and Figure 7 As shown, the ball bearing is configured as an elastic element 201 and a ball bearing connected together. To facilitate the assembly of the elastic element 201 and the ball bearing, the elastic element 201 extends along the axial direction of the first guide channel 100, such that one end of the elastic element 201 abuts against the lower end of the ball bearing. Of course, in other embodiments, regardless of how the elastic element 201 is configured, it is sufficient that the elastic element 201 is always subjected to an elastic force toward the second positioning part 12. The elastic element 201 includes, but is not limited to, a spring, a retaining ring, or a component with elastic deformation capability, such as silicone rubber.

[0041] In one embodiment, the first positioning part 11 is configured as a thread, a magnetic component, a snap-fit, or a fastener, and the first positioning mating part 20 is correspondingly configured as a threaded engagement part, a magnetic engagement part, a snap-fit ​​part, or a fastener connection hole. The key point of this application's technical solution is that the first positioning part 11 (axial connection positioning) and the second positioning part 12 (radial connection positioning) form a dual axial and radial positioning, and the thread has high machining accuracy and small error. Of course, in the future or with other technological means, magnetic components, snap-fits, or fasteners, etc., with axial positioning effects, can achieve the same accuracy requirements as threads and also achieve similarly good axial positioning effects.

[0042] In one embodiment, such as Figure 1 , Figure 2a , Figure 2b As shown in Figure 3-8, the first part 1 includes a first body 10 and a second body 13 that are nested together. The first positioning part 11 is disposed on the first body 10, and the second positioning part 12 and the first guide channel 100 are disposed on the second body 13.

[0043] The first body 10 is provided with a receiving cavity 101 for accommodating the second positioning and mating part 21. The receiving cavity 101 has an opening, and the ball is movably disposed inside the receiving cavity 101 and partially protrudes from the opening.

[0044] In one embodiment, the inner wall of the receiving cavity has a spaced-apart first abutment portion 1010 and abutment portion 1011. The first abutment portion 1010 is configured as an inclined surface inclined upward toward the second positioning portion 12, and the second abutment portion 1011 is configured as an inclined surface inclined upward away from the second positioning portion 12. Under the assembly force of the first positioning portion 11 and the first positioning mating portion 20, the second abutment portion 1011 drives the second positioning mating portion 21 to slide on the first abutment portion 1010 and radially limit it to the second positioning portion 12.

[0045] Specifically, refer to Figure 7The inner wall of the second positioning part 12 is provided with a third abutting part 120, which protrudes toward the second body 13 and abuts against the second positioning mating part 21.

[0046] Optionally, the first abutting portion 1010, the second abutting portion 1011, and the third abutting portion 120 described above may be configured as other protruding structures. Split structures that are separate from the corresponding main body are all within the scope of protection of this application. The second abutting portion 1011 may be a protruding structure, or it can be understood that the second abutting portion 1011 can generate a radial force on the ball during the installation of the first positioning portion 11.

[0047] After the first positioning part 11 and the first positioning mating part 20 are assembled, the second body 13 is driven to move upward. The second abutting part 1011 then drives the ball to move upward along the first abutting part 1010. At this time, the ball is subjected to a radial force and slides against the second positioning part 12 through the opening. In this embodiment, the second body 13 can be configured as a nozzle, and the first body 10 can be configured as a locking ring for connecting the nozzle and the nozzle mounting body.

[0048] In one embodiment, Figure 1-7 The diagram shows that the first positioning part 11 is provided on the inner or outer circumferential wall of the first body 10, and the second positioning part 12 is provided on the inner or outer circumferential wall of the first body 10, so that the first body 10, the first part 1 and the second part 2 can be arranged in any combination to form an inner and outer structure.

[0049] Part 1 and Part 2 are designed from the inside out or from the outside in.

[0050] like Figure 1 As shown, the second body 13, the second part 2, and the first body 10 are sequentially nested from the inside out, with the lower end face of the second part 2 abutting against the upper end face of the second body 13.

[0051] As shown in Figure 3, the second part 2, the first body 10, and the second body 13 are arranged sequentially from the outside to the inside. The first body 10 and the second body 13 can be connected by threads or by a positioning connection component. Details are not elaborated here; please refer to the above.

[0052] like Figure 4 As shown, the first body 10, the second body 13, and the second part 2 are arranged sequentially from the outside to the inside.

[0053] In one embodiment, the first part 1 is provided with a raised ring of steps 130 in the circumferential direction. The steps 130 can be used to block splashes during the processing or to gather airflow.

[0054] The following explanation, with reference to the diagram, details the different states of the positioning connection component.

[0055] Locked state: such as Figure 2a As shown, Figure 2a This diagram illustrates the sequential fitting and locking of the first body 10, the second part 2, and the first part 1 from the outside in; and for illustration, the first part 1 has a step 130. In this state, the first positioning part 11 and the second positioning part 12 can be connected by a threaded engagement (not shown), causing the ball to move upwards. The second abutting part 1011 of the receiving cavity abuts against the ball, causing the ball to move along the first abutting part 1010 toward the second positioning part 12. At this time, the ball is subjected to a radial force toward the second positioning part 12 until the ball completely abuts against the third abutting part 120, which is limited to the groove of the second positioning part 12, and then the screwing stops. This allows the two sides of the second positioning mating part 21 (ball) to abut against the inner wall of the groove of the first part 1, the first abutting part 1010 of the receiving cavity of the first body 10, and the second abutting part 1011 of the receiving cavity, respectively. In this state, a gap can be maintained between the lower end face of the first body 10 and the upper end face of the step 130.

[0056] Incompletely loosened state: such as Figure 2b As shown, Figure 2b This is a schematic diagram showing the first body 10, the second part 2, and the first part 1 sequentially fitted from the outside in, without being completely loosened; and for illustration, the first part 1 has a step 130. In this state, the first positioning part 11 and the first fixed mating part separate, or it can be understood that the first body 10 descends during the screwing process (not shown, the threads are at least partially separated), causing the ball to descend synchronously, generating a downward force on the ball and a component force away from the direction of the second positioning part 12. At this time, the second positioning mating part 21 (ball) then gradually withdraws from the second positioning part 12 of the first part 1 (separating from the third abutting part 120) and abuts against the second abutting part 1011 and the first abutting part 1010 of the receiving cavity. At this time, the gap between the lower end face of the first body 10 and the upper end face of the step 130 narrows until they abut against each other without gap.

[0057] Fully released state: such as Figure 2c As shown, Figure 2c This is a schematic diagram showing the first body 10, the second part 2, and the first part 1 sequentially fitted from the outside in, and completely released. In this state, the first positioning part 11 and the first positioning mating part 20 are completely separated. After the first body 10 is completely detached from the second part 2, the first part 1 can be completely detached from the inside of the first body 10. The second positioning mating part 21 (ball) is detached from the second positioning part 12, returning to the initial state: the ball can rotate arbitrarily in the receiving cavity without detaching from the receiving cavity, while part of the ball's surface can still protrude through the opening.

[0058] like Figure 1As shown in Figures 3-6, at least one of the following is provided with a sealing element, such as a common O-ring, between the assembly gaps of the first body 10 and the first part 1, the assembly gaps between the first part 1 and the second part 2, and the assembly gap between the first body 10 and the second part 2. This sealing element effectively prevents impurities such as dust, metal shavings, and fumes generated during processing from entering the first guide channel 100 and the second guide channel 200. During laser processing, debris generated from cutting or welding easily enters the equipment, keeping the internal optical components clean, extending their service life, and ensuring the long-term stable operation of the laser processing head. Secondly, the sealing design also prevents airflow from overflowing from the guide channels or avoids mixing of protective gas and cutting gas.

[0059] In one embodiment, the second part 2 is provided with at least one of a focusing device, a collimating device, a protective mirror, a beam shaping device, a laser transmission tube, and a cooling device.

[0060] For example, when the second part 2 is set as the output head of the cutting head, the first part 1 can be set as a mounting body or lens barrel assembly (including the mounting body and lens barrel) that is connected to the output head.

[0061] For example, when the second part 2 is set as the lens barrel of the cutting head, the first part 1 can be set as a cooling body connected to the lens barrel.

[0062] For example, when the second part 2 is set as a cooling body, the first part 1 can be set as a ceramic ring.

[0063] For example, when the second part 2 is set as a ceramic ring, the first part 1 may include a first body 10 and a second body 13, the first body 10 is set as a locking ring, and the second body 13 is a nozzle.

[0064] For example, when the second part 2 is set as the laser transmission lens of the welding head, the first part 1 can be directly a nozzle. Alternatively, the first part 1 may include a first body 10 and a second body 13, where the first body 10 is a locking ring and the second body 13 is a nozzle.

[0065] In this design, the ball bearings of the positioning connection assembly are located on the inner or outer wall of the laser transmission lens tube, which is more cost-effective than placing the ball bearings on the nozzle. Since nozzles are easily damaged during processing, the laser transmission lens tube has a relatively lower failure rate.

[0066] In summary, because lasers have a radiation effect that can damage the objects they contact, the coaxial arrangement of the laser channel in a laser processing head is particularly important. The coaxial positioning structure involved in this application can be applied not only to laser cutting but also to other laser processing heads, such as handheld or automatic laser welding and handheld or automatic laser cleaning.

[0067] According to one aspect of the present invention, a nozzle is provided, the nozzle being provided with a second positioning part 12 or a receiving cavity 101, the second positioning part 12 or the receiving cavity 101 being used to accommodate a plurality of second positioning mating parts 21 and being sleeved on a first body 10 through the second positioning mating parts 21, the first body 10 being provided with a first positioning part 11, the first positioning part 11 being used to connect with the first positioning mating part 20 of the second part 2; the nozzle is also provided with a first guide channel 100 arranged along its axial direction, the plurality of second positioning mating parts 21 being arranged at intervals around the central axis of the first guide channel 100; the second positioning mating parts 21 can radially abut against the second positioning part 12 or the receiving cavity 101 under the assembly force of the first positioning part 11 and the second part 2, so that the nozzle and the second part 2 are arranged coaxially.

[0068] According to one aspect of the present invention, a nozzle module is provided, comprising: a first body 10 and a second body 13 nested together, the nozzle module having a spaced first positioning part 11 and a second positioning part 12, and the nozzle module having a first guide channel 100 arranged along its axial direction, the first positioning part 11 being used to connect with a first positioning mating part 20 of the second part 2; the nozzle module includes a positioning connection assembly, the positioning connection assembly including a plurality of second positioning mating parts 21 arranged spaced around the central axis of the first guide channel 100; wherein, the second positioning part 12 is used to accommodate the second positioning mating parts 21 in a one-to-one correspondence, the second positioning mating parts 21 being radially abutting against the second positioning part 12 under the assembly force of the first positioning part 11 and the second part 2, so that the second body 13 and the second part 2 are arranged coaxially.

[0069] According to one aspect of the present invention, a nozzle fixing member is provided. The nozzle fixing member is provided with a second positioning part 12 or a receiving cavity 101. The second positioning part 12 or the receiving cavity 101 is used to accommodate a plurality of second positioning mating parts 21 and to sleeve a second body 13 therein through the second positioning mating parts 21. The nozzle fixing member is provided with a first positioning part 11, which is used to connect with the first positioning mating part 20 of the second body 2. The second body 13 is also provided with a first guide channel 100 arranged along its axial direction. The plurality of second positioning mating parts 21 are arranged at intervals around the central axis of the first guide channel 100. The second positioning mating parts 21 can radially abut against the second positioning part 12 or the receiving cavity 101 under the assembly force of the first positioning part 11 and the second body 2, so that the nozzle and the second body 2 are arranged coaxially.

[0070] According to one aspect of the present invention, a laser processing head is provided, including the coaxial positioning connection structure of the above-described solution.

[0071] According to one aspect of the present invention, a laser processing apparatus is provided, including the laser processing head of the above-described scheme.

[0072] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A coaxial positioning connection structure, characterized in that, include: The first part (1) has a first positioning part (11) and a second positioning part (12) spaced apart, and the first part (1) has a first guide channel (100) arranged along its axial direction. The positioning connection assembly includes a plurality of second positioning mating parts (21) arranged at intervals around the central axis of the first guide channel (100), and the second positioning mating parts (21) correspond one-to-one with the second positioning parts (12); The second part (2) is provided with a first positioning mating part (20) connected to the first positioning part (11). The second part (2) has a second guide channel (200) arranged along its axial direction. The second positioning mating part (21) can radially abut against the second positioning part (12) under the assembly force of the first positioning part (11) and the first positioning mating part (20), so that the first part (1) and the second part (2) are arranged coaxially.

2. The coaxial positioning connection structure according to claim 1, characterized in that The coaxial positioning connection structure has a receiving cavity (101). The inner wall of the receiving cavity (101) includes a first abutting part (1010) and a second abutting part (1011), both of which are inclined surfaces; The first abutting part (1010) is inclined toward the second positioning part (12), and the second abutting part (1011) is inclined away from the second positioning part (12); During the assembly process of the first positioning part (11) and the first positioning mating part (20), the second positioning mating part (21) slides along the first abutting part (1010) under the action of the second abutting part (1011) and abuts radially against the second positioning part (12).

3. The coaxial positioning connection structure according to claim 2, characterized in that The first part (1) includes a first body (10) and a second body (13) nested together, the first positioning part (11) is disposed on the first body (10), the receiving cavity is disposed on the first part (1), and the first guiding channel (100) is disposed on the second body (13).

4. The coaxial positioning connection structure according to claim 3, characterized in that The first positioning and mating part (20) is provided on the second part (2), the second positioning part (12) is provided on the second body (13), and the receiving cavity (101) is provided on the first body (10).

5. The coaxial positioning connection structure according to claim 3, wherein The first positioning and mating part (20) is provided on the second part (2), the second positioning part (12) is provided on the first body (10) or the second part (2), and the second body (13) is provided with a receiving cavity.

6. The coaxial positioning connection structure of claim 1, wherein At least one sealing element (3) is provided in the assembly gap between the first part (1) and the second part (2) so that the first guide channel (100) and the second guide channel (200) form a closed laser beam guide channel.

7. The coaxial positioning connection structure of claim 1, wherein The second positioning part (12) is a groove; The second positioning mating part (21) is configured as a ball bearing; Alternatively, the second positioning mating part (21) is configured as an elastic element (201) and a positioning post connected together, wherein the end of the positioning post opposite to the elastic element (201) is provided with a curved surface or a chamfer; Alternatively, the balls may be configured as an elastic element (201) and balls connected together; The elastic element (201) applies a contact force to the ball toward the second positioning part (12).

8. The coaxial positioning connection structure according to claim 1, characterized in that, The first positioning part (11) is configured as a thread, a magnetic component, a snap fastener or a fastener, and the first positioning mating part (20) is configured as a threaded engagement part, a magnetic engagement part, a snap fastener engagement part or a fastener connection hole.

9. The coaxial positioning connection structure of claim 1, wherein, The second part (2) is provided with at least one of the following: a focusing device, a collimating device, a protective mirror, a beam shaping device, a laser transmission tube, and a cooling device.

10. A nozzle characterized by, The nozzle is provided with a second positioning part (12) or a receiving cavity. The second positioning part (12) or the receiving cavity is used to accommodate a plurality of second positioning mating parts (21) and is sleeved on the first body (10) through the second positioning mating parts (21). The first body (10) is provided with a first positioning part (11). The first positioning part (11) is used to connect with the first positioning mating part (20) of the second part (2). The nozzle is also provided with a first guide channel (100) arranged axially thereon, and a plurality of second positioning devices. The combined section (21) is arranged at intervals around the central axis of the first guide channel (100); The second positioning mating part (21) can radially abut against the second positioning part (12) or the receiving cavity under the assembly force of the first positioning part (11) and the second part (2), so that the nozzle and the second part (2) are arranged coaxially.

11. A nozzle module characterized by, The nozzle module includes: The first body (10) and the second body (13) are nested together. The nozzle module is provided with a first positioning part (11) and a second positioning part (12) spaced apart. The nozzle module has a first guide channel (100) arranged along its axial direction. The first positioning part (11) is used to connect with the first positioning mating part (20) of the second part (2). The positioning connection assembly includes a plurality of second positioning mating parts (21) arranged at intervals around the central axis of the first guide channel (100). The second positioning part (12) is used to accommodate the second positioning mating part (21) in a one-to-one correspondence. The second positioning mating part (21) can radially abut against the second positioning part (12) under the assembly force of the first positioning part (11) and the second part (2), so that the second body (13) and the second part (2) are arranged coaxially.

12. A nozzle fixing component, characterized in that, The nozzle fixing member is provided with a second positioning part (12) or a receiving cavity, the second positioning part (12) or the receiving cavity is used to accommodate a plurality of second positioning mating parts (21) and the second body (13) is sleeved in the second positioning mating parts (21). The nozzle fixing member is provided with a first positioning part (11), which is used to connect with the first positioning mating part (20) of the second part (2); The second body (13) is also provided with a first guide channel (100) arranged along its axial direction, and a plurality of second positioning mating parts (21) are arranged at intervals around the central axis of the first guide channel (100); The second positioning mating part (21) can radially abut against the second positioning part (12) or the receiving cavity under the assembly force of the first positioning part (11) and the second part (2), so that the nozzle and the second part (2) are arranged coaxially.

13. A laser machining head, characterized by, Includes the coaxial positioning connection structure as described in any one of claims 1-9.

14. A laser processing apparatus characterized by comprising: Includes the laser processing head as described in claim 13.

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