Coaxial blowing device and laser processing equipment

Abstract

The utility model discloses a coaxial blowing device and laser processing equipment, the coaxial blowing device comprises a mounting seat, a nozzle and an adjusting part which are connected in sequence, a first through hole is formed in the mounting seat, a second through hole is formed in the nozzle, a third through hole is formed in the adjusting part, and the three through holes form a light path channel; an airflow channel located on the peripheral side of the second through hole is further arranged in the nozzle, an inlet of the airflow channel is formed in the outer wall of the nozzle, and an outlet of the airflow channel communicates with the second through hole; the protective gas can pass through the gas flow channel and enter the second through hole through the outlet, the adjusting piece is located below the outlet, the upper end face of the adjusting piece faces the outlet, the protective gas blown to the end face of the adjusting piece can be divided in the nozzle and sprayed out from the upper end and the lower end of the nozzle, and the gas flow can conduct all-around protection on a laser beam and a welding seam below the laser beam. The air flow sprayed from the upper portion can prevent external smoke from entering the nozzle from top to bottom, the distance between the adjusting piece and the outlet can be adjusted, and the adjusting piece can be used for controlling the flow speed of the air entering the light path channel.

Description

Technical Field

[0001] The present application relates to the field of laser processing, and in particular to a coaxial air blowing device and laser processing equipment. Background Art

[0002] In laser processing production, under the irradiation of high-power laser beam, an oxygen-free environment needs to be formed on the processing part of the workpiece surface to prevent the welding area from being oxidized by air and affecting the product process effect. If a blowing device is not installed, it is easy to produce welds in the product welding area and affect the welding stability during the laser processing process. This will cause product defects for some products with high appearance. If welding stability is to be guaranteed and good weld formation is to be obtained, the interference of plasma and smoke on the welding process must be effectively controlled. Therefore, it is necessary to add a blowing device in the welding area.

[0003] Usually, the blowing mechanism of laser equipment processing blows inert gas from the side of the product to protect the welding area. The side blowing is directional, so the side blowing can only ensure that one side of the welding is in the inert gas protection area, which cannot achieve the requirement of fully protecting the weld from oxidation. Utility Model Content

[0004] This application proposes a coaxial air blowing device and laser processing equipment, which can provide all-round protection for welds and laser beams.

[0005] The present application proposes a coaxial air blowing device, comprising:

[0006] A mounting seat having a first through hole;

[0007] a nozzle, one end of which is disposed on the mounting seat, the nozzle being provided with a second through hole corresponding to the first through hole, the interior of the nozzle further being provided with an air flow channel located around the second through hole, the inlet of the air flow channel being provided on the outer wall of the nozzle, and the outlet of the air flow channel being connected to the second through hole;

[0008] An adjusting member is provided with a third through hole corresponding to the second through hole. The adjusting member is provided at one end of the nozzle away from the mounting seat and is located below the outlet. The outlet is arranged toward the end face of the adjusting member, and the distance between the adjusting member and the outlet can be adjusted.

[0009] In some embodiments, the adjusting member is disposed at the lower end of the second through hole and is threadedly connected to the nozzle.

[0010] In some embodiments, the nozzle is magnetically connected or negatively pressure connected to the mounting base.

[0011] In some embodiments, the mounting base includes a mounting plate provided with the first through hole, a first connecting member provided on the mounting plate and located on one side of the first through hole, and a second connecting member provided at an end of the first connecting member away from the mounting plate, and the distance between the second connecting member and the mounting plate can be adjusted.

[0012] In some embodiments, the first connecting member includes a connecting rod, the mounting plate is provided with a mounting hole for mounting the connecting rod, and the side wall of the mounting plate is further provided with a locking screw for locking the connecting rod.

[0013] In some embodiments, the second through hole is a stepped hole, the outlet is provided on a stepped surface of the stepped hole, the adjusting member is provided in the stepped hole, and an upper end surface of the adjusting member is spaced apart from the stepped surface.

[0014] In some embodiments, the nozzle includes a body connected to the mounting seat, and a sheath provided on the periphery of the body, and the adjusting member is provided at the lower end of the sheath and spaced apart from the body.

[0015] In some embodiments, a groove is provided on the outside of the body, one end of the groove is provided on the end surface of the body away from the mounting seat, the groove and the sheath form the air flow channel, and the opening of the groove on the end surface constitutes the outlet.

[0016] In some embodiments, the main body includes a mounting portion connected to the mounting seat, and a cone arranged on one side of the mounting portion, the second through hole is arranged through the mounting portion and the cone, the groove is arranged on the circumferential side of the cone, and the entrance is arranged on the side wall of the mounting portion and connected to the groove.

[0017] The present application also proposes a laser processing device, comprising the above-mentioned coaxial air blowing device and a laser head connected to the coaxial air blowing device.

[0018] The present application provides a coaxial blowing device and laser processing equipment, the coaxial blowing device includes a mounting base, a nozzle and an adjusting member connected in sequence, the mounting base is provided with a first through hole, the nozzle is provided with a second through hole, and the adjusting member is provided with a third through hole, and the three through holes constitute an optical path channel; the nozzle is also provided with an air flow channel located on the circumferential side of the second through hole, the inlet of the air flow channel is provided on the outer wall of the nozzle, and the outlet of the air flow channel is connected to the second through hole; the protective gas can pass through the air flow channel and enter the second through hole through the outlet, the adjusting member is located below the outlet, and its upper end face is arranged toward the outlet, the protective gas blown toward the end face of the adjusting member will be diverted in the nozzle and ejected from the upper and lower ends of the nozzle, the air flow can provide all-round protection to the laser beam and the weld below, the air flow ejected from the top may prevent external smoke and dust from entering the nozzle from top to bottom, the distance between the adjusting member and the outlet can be adjusted, which can be used to control the flow rate of the gas entering the optical path channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of a coaxial air blowing device in one embodiment of the present application;

[0020] Figure 2 A cross-sectional view of a nozzle in one embodiment of the present application;

[0021] Figure 3 for Figure 2 Flow diagram of the air flow in the nozzle in the embodiment;

[0022] Figure 4 This is a structural diagram of the nozzle and the adjusting member in another embodiment of the present application.

[0023] Description of labels:

[0024] 10. Mounting seat; 11. Mounting plate; 12. First connecting member; 13. Second connecting member; 14. First through hole; 20. Nozzle; 21. Main body; 22. Sheath; 24. Second through hole; 25. Air flow channel; 251. Inlet; 252. Outlet; 253. Groove; 254. Air guide step; 255. Annular groove; 26. Magnet; 30. Adjustment member; 31. Third through hole.

[0025] The purpose, features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the schemes in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments in this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0027] It should be noted that all directional indications such as up, down, left, right, front, back, etc. in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0028] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element.

[0029] In addition, the descriptions of "first", "second", etc. in this application are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0030] The present application embodiment proposes a coaxial blowing device, referring to Figure 1 and Figure 2 The coaxial blowing device includes: a mounting base 10, which is provided with a first through hole 14; a nozzle 20, one end of which is provided on the mounting base 10, and the nozzle 20 is provided with a second through hole 24 corresponding to the first through hole 14, and an air flow channel 25 is further provided inside the nozzle 20 and is located on the side of the second through hole 24. The inlet 251 of the air flow channel 25 is provided on the outer wall of the nozzle 20, and the outlet 252 of the air flow channel 25 is connected to the second through hole 24; an adjusting member 30, which is provided with a third through hole 31 corresponding to the second through hole 24, and the adjusting member 30 is provided at one end of the nozzle 20 away from the mounting base 10, and is located below the outlet 252, and the outlet 252 is arranged toward the end surface of the adjusting member 30, and the distance between the adjusting member 30 and the outlet 252 can be adjusted.

[0031] In this embodiment, the coaxial blowing device includes a mounting base 10, a nozzle 20, and an adjusting member 30 connected in sequence. The first through hole 14, the second through hole 24, and the third through hole 31 are arranged in sequence and together constitute an optical path; the protective gas can enter the nozzle 20 through the air flow channel 25 and enter the second through hole 24 through the outlet 252. The adjusting member 30 is located below the outlet 252, and its upper end face is arranged toward the outlet 252. Figure 2 and Figure 3The shielding gas blown toward the end face of the regulating member 30, blocked by the regulating member 23, converges toward the center of the optical path and is divided within the nozzle 20, ejecting from the upper and lower ends of the nozzle 20. The airflow provides all-round protection for the laser beam and the weld below. The airflow ejected from above prevents external smoke and dust from entering the nozzle 20 from top to bottom. The upper end face of the regulating member 30 blocks the airflow from the outlet 252 to a certain extent. The distance between the upper end face of the regulating member 30 and the outlet 252 can be adjusted to control the flow rate of the gas entering the optical path.

[0032] It is worth noting that the word "coaxial" in the coaxial blowing device refers to the fact that the direction of the optical path is coaxial with the flow of gas. As a result, the airflow ejected from both ends of the optical path can wrap around the laser beam at the center of the airflow, providing all-round protection for the laser beam and the solder joint below.

[0033] Furthermore, an adjustment member 30 is disposed at the lower end of the second through hole 24 and is threadedly connected to the nozzle 20. The adjustment member 30 has external threads on its exterior, and the second through hole 24 has internal threads near its lower end. The adjustment member 30 can be screwed into the second through hole 24. By screwing the adjustment member 30, the depth of screwing can be controlled, thereby adjusting the distance between the outlet 252 and the adjustment member 30, thereby controlling the airflow velocity in the optical path.

[0034] In some embodiments, reference Figure 1 , the nozzle 20 is connected to the mounting base 10 by magnetic attraction or negative pressure. In this embodiment, a magnet 26 can be provided on the mounting base 10 and / or the nozzle 20 to enable the mounting base 10 and the nozzle 20 to be magnetically connected. Of course, a negative pressure air circuit can also be provided between the mounting base 10 and the nozzle 20, and the negative pressure air circuit can be evacuated by an external vacuum generator to achieve negative pressure adsorption of the mounting base 10 and the nozzle 20. Both methods are to ensure that the nozzle 20 can fall off in time when cutting the rotating shaft to avoid damage to the main shaft and the workpiece.

[0035] Furthermore, the mounting base 10 includes a mounting plate 11 having a first through-hole 14, a first connector 12 disposed on the mounting plate and positioned to one side of the first through-hole 14, and a second connector 13 disposed at the end of the first connector 12 facing away from the mounting plate 11. The spacing between the second connector 13 and the mounting plate 11 is adjustable. In this embodiment, the second connector 13 and the nozzle 20 are disposed on opposite sides of the mounting plate 11, respectively, and the second connector 13 is used to connect to the laser head. By adjusting the distance between the second connector 13 and the mounting plate 11, the distance between the laser head and the nozzle 20 can be adjusted to accommodate laser beams with different focal lengths.

[0036] Furthermore, the first connecting member 12 includes a connecting rod, and a mounting hole for installing the connecting rod is provided on the mounting plate 11, and a locking screw for locking the connecting rod is also provided on the side wall of the mounting plate 11. In this embodiment, the connecting rod is provided in the mounting hole, and the locking screw passes through the side wall of the mounting plate and extends into the mounting hole to abut against the connecting rod, thereby locking the connecting rod. Unlocking can be completed by loosening the locking screw to separate it from the connecting rod. After completing the height adjustment of the nozzle 20, the locking screw can be tightened. Of course, a through groove connected to the mounting hole can also be provided on the side wall of the mounting plate 11, and the locking screw is used to connect the two side walls of the through groove. The through groove and the mounting hole form a C-shaped clamp structure for clamping the connecting rod. Twisting the locking screw is used to adjust the clamp strength so as to complete the height adjustment of the nozzle 20. The above locking method using the locking screw is simple in structure and easy to operate.

[0037] In some embodiments, reference Figure 2 The second through hole 24 is a stepped hole, with the outlet 252 disposed on the stepped surface of the stepped hole. The adjusting member 30 is disposed in the stepped hole, with the upper end surface of the adjusting member 30 spaced apart from the stepped surface. In this embodiment, the second through hole 24 includes two upper and lower sections. Near the stepped surface, the inner diameter of the lower section is larger than that of the upper section, and the adjusting member 30 can be disposed in the lower section. An annular groove 255 is formed between the adjusting member 30 and the stepped surface. The airflow ejected from the outlet 252 on the stepped surface enters the annular groove 255, ensuring that the airflow is evenly distributed in the annular groove 255, converging toward the center and then diverging. This ensures that the airflow ejected from the upper and lower ends of the nozzle 20 is more balanced in the circumferential direction. This ensures that there is no blind spot protection for the welding point and the laser beam. Of course, multiple outlets 252 surrounding the axis can also be provided on the stepped surface to make the airflow more evenly distributed in the annular groove 255, further improving the circumferential balance of the airflow ejected from both ends.

[0038] It's worth noting that rifling, or spiral grooves, can also be provided on the inner wall of the third through hole 31 and the inner wall of the upper section of the second through hole 24. This can guide the airflow ejected from the nozzle 20 and form a vortex. This vortex provides greater stability for the airflow ejected from both ends, further enhancing protection for the weld and the laser above. To accommodate the shape of the laser beam, the upper section of the second through hole 24 can be configured as an inverted cone.

[0039] In some embodiments, reference Figure 1 and Figure 4 The nozzle 20 includes a body 21 connected to the mounting seat 10 and a sheath 22 provided on the outer periphery of the body 21. The adjusting member 30 is provided at the lower end of the sheath 22 and is spaced apart from the body 21. Figure 2Because the nozzle 20 is internally provided with the aforementioned airflow channel 25, it is constructed as a single piece, resulting in higher manufacturing costs. In this embodiment, the nozzle 20 can be configured as a split structure, specifically comprising a body 21 and a sheath 22 that cooperate with each other. The sheath 22 is disposed on the outer periphery of the body 21. A groove 253 is machined on the contact surface of the sheath 22 or the body 21 to form the aforementioned airflow channel 25. Specifically, the outer side of the body 21 is provided with the aforementioned groove 253. One end of the groove 253 is located on the end face of the body 21 facing away from the mounting seat 10. The groove 253 and the sheath 22 form the airflow channel 25, and the opening of the groove 253 on the end face forms the outlet 252. The body 21 includes a mounting portion connected to the mounting seat 10 and a frustum disposed on one side of the mounting portion. A second through hole 24 is disposed through the mounting portion and the frustum. The groove 253 can be disposed on the periphery of the frustum, and the inlet 251 is disposed on the side wall of the mounting portion and communicates with the groove 253. The mounting portion can be a flange structure, with a frustum mounted on it. An air-guiding step 254 is provided on the end of the frustum away from the mounting portion. The groove 253 extends through the stepped surface of this air-guiding step 254 to form an outlet 252. This air-guiding step 254 and the inner wall of the sheath 22 form an annular cavity, allowing airflow to flow through the cavity, achieving a stabilizing effect and ensuring balanced airflow throughout the cavity. The air then flows from the cavity into the annular groove 255, further stabilizing the flow.

[0040] Of course, the groove 253 can also be configured as a spiral groove so that the airflow has a tangential velocity after entering the annular groove 255, thereby forming a cyclone inside the nozzle 20 and further evenly distributing the airflow in the annular groove 255. The split structure of the nozzle 20 reduces its processing difficulty and manufacturing cost.

[0041] This application also proposes a laser processing device, comprising the aforementioned coaxial air blowing device and a laser head connected to the coaxial air blowing device. In this embodiment, the laser processing device can be a laser welder or a laser cutter, for example. It is worth noting that when the coaxial air blowing device in the embodiment of this application is used in a laser welder with coaxial wire feeding, the airflow in the nozzle can also provide comprehensive protection for the welding wire.

[0042] In the embodiment of the present application, the working principle of the coaxial blowing device and the laser processing equipment is as follows: the coaxial blowing device includes a mounting base 10, a nozzle 20 and an adjusting member 30 connected in sequence, a first through hole 14 is provided on the mounting base 10, a second through hole 24 is provided inside the nozzle 20, and a third through hole 31 is provided on the adjusting member 30. The three through holes are arranged in sequence from top to bottom and are interconnected to form an optical path channel. An air flow channel 25 is also provided inside the nozzle 20 and is located on the side of the second through hole 14. The air flow channel 25 forms an inlet 251 on the outer wall of the nozzle 20 and an outlet 252 on the inner wall of the second through hole 24. The shielding gas can pass through the air flow channel 25 and enter the second through hole 24 through the outlet 252. The adjusting member 30 is located below the outlet 252, and its upper end face is arranged toward the outlet 252. The shielding gas blown toward the end face of the adjusting member 30 will be diverted in the nozzle 20 and ejected from the upper and lower ends of the nozzle 20. The air flow can provide all-round protection for the laser beam and the weld below. The air flow ejected from above may prevent external smoke and dust from entering the nozzle 20 from top to bottom. The distance between the adjusting member 30 and the outlet 252 can be adjusted, which can be used to control the flow rate of the gas entering the optical path.

[0043] The above are only partial or preferred embodiments of the present application. Neither the text nor the drawings can limit the scope of protection of the present application. All equivalent structural transformations made using the contents of the present application specification and drawings under the overall concept of the present application, or direct / indirect application in other related technical fields are included in the scope of protection of the present application.

Claims

1. A coaxial blowing device, characterized in that: include: A mounting seat having a first through hole; a nozzle, one end of which is disposed on the mounting seat, the nozzle being provided with a second through hole corresponding to the first through hole, the interior of the nozzle further being provided with an air flow channel located around the second through hole, the inlet of the air flow channel being provided on the outer wall of the nozzle, and the outlet of the air flow channel being connected to the second through hole; An adjusting member is provided with a third through hole corresponding to the second through hole. The adjusting member is provided at one end of the nozzle away from the mounting seat and is located below the outlet. The outlet is arranged toward the end face of the adjusting member, and the distance between the adjusting member and the outlet can be adjusted.

2. The coaxial blowing device according to claim 1, characterized in that: The adjusting member is arranged at the lower end of the second through hole and is threadedly connected to the nozzle.

3. The coaxial blowing device according to claim 1, characterized in that: The nozzle is connected to the mounting seat by magnetic attraction or negative pressure.

4. The coaxial blowing device according to claim 1, characterized in that: The mounting seat includes a mounting plate provided with the first through hole, a first connecting member provided on the mounting plate and located on one side of the first through hole, and a second connecting member provided at an end of the first connecting member away from the mounting plate, and the distance between the second connecting member and the mounting plate can be adjusted.

5. The coaxial blowing device according to claim 4, characterized in that: The first connecting member includes a connecting rod, a mounting hole for mounting the connecting rod is provided on the mounting plate, and a locking screw for locking the connecting rod is further provided on the side wall of the mounting plate.

6. The coaxial air blowing device according to any one of claims 1 to 5, characterized in that: The second through hole is a stepped hole, the outlet is provided on a stepped surface of the stepped hole, the adjusting member is provided in the stepped hole, and the upper end surface of the adjusting member is spaced apart from the stepped surface.

7. The coaxial blowing device according to claim 6, characterized in that: The nozzle comprises a body connected to the mounting seat and a sheath arranged on the periphery of the body. The adjusting member is arranged at the lower end of the sheath and spaced apart from the body.

8. The coaxial blowing device according to claim 7, characterized in that: A groove is provided on the outer side of the body, one end of the groove is provided on the end face of the body away from the mounting seat, the groove and the sheath form the air flow channel, and the opening of the groove on the end face constitutes the outlet.

9. The coaxial blowing device according to claim 8, characterized in that: The main body includes a mounting portion connected to the mounting seat, and a frustum provided on one side of the mounting portion, the second through hole is provided through the mounting portion and the frustum, the groove is provided on the circumferential side of the frustum, and the inlet is provided on the side wall of the mounting portion and is connected to the groove.

10. A laser processing device, characterized in that: The invention comprises the coaxial air blowing device according to any one of claims 1 to 9 and a laser head connected to the coaxial air blowing device.

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