Copper nozzle presser foot tool for laser welding

Abstract

This invention provides a copper nozzle presser foot fixture for laser welding, including an adjusting base and a presser part rotatably mounted on the adjusting base. The presser part includes a pressing copper nozzle and an inner copper nozzle. The pressing copper nozzle has a first recess on its side facing the adjusting base, a second recess at the bottom of the first recess, and a guide hole penetrating the bottom of the second recess. The area between the inner walls of the second and first recesses at the bottom of the first recess forms an assembly step. An air-gathering groove is provided on the assembly step, connecting to the second recess. The area between two adjacent air-gathering grooves forms an installation section. The pressing copper nozzle has an air inlet connecting to the air-gathering groove. The inner copper nozzle has a welding hole penetrating it. The end of the inner copper nozzle away from the adjusting base is embedded in the guide hole, forming an annular guide hole with the guide hole. The inner copper nozzle is mounted on the assembly step. This invention provides uniform air blowing and can achieve good welding results when used with a laser welding head.

Description

Technical Field

[0001] This invention relates to the field of copper nozzle technology, and more particularly to a copper nozzle presser foot fixture for laser welding. Background Technology

[0002] Laser welding copper nozzle mechanisms mostly involve internally processed protective gas channels, which are complex in structure and difficult to manufacture. To address this, a split copper nozzle has emerged, consisting of two cylindrical structures, one internal and one external. This design is easier to manufacture, but suffers from uneven air blowing and poor welding consistency. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a copper nozzle presser foot fixture for laser welding, which blows air evenly and can work with the laser welding head to achieve good welding results.

[0004] The embodiments of the present invention are achieved through the following technical solutions: A copper nozzle presser foot fixture for laser welding includes an adjusting base and a presser part rotatably mounted on the adjusting base. The presser part includes a pressing copper nozzle and an inner copper nozzle. The pressing copper nozzle has a first recess on one side facing the adjusting base, a second recess at the bottom of the first recess, and a guide hole penetrating the bottom of the second recess. The area at the bottom of the first recess, between the inner wall of the second recess and the inner wall of the first recess, forms an assembly step. An air-gathering groove is provided on the assembly step, connecting to the second recess. The area between two adjacent air-gathering grooves forms an installation section. The pressing copper nozzle has an air inlet connecting to the air-gathering groove. The inner copper nozzle has a welding hole penetrating it. The end of the inner copper nozzle away from the adjusting base is embedded in the guide hole, and together with the guide hole, forms an annular guide hole. The inner copper nozzle is mounted on the assembly step.

[0005] According to a preferred embodiment, the flow guide hole includes a first straight hole section, a conical hole section, and a second straight hole section connected in sequence. The second straight hole section is located at the end of the conical hole section away from the adjusting seat. The small end of the conical hole section is connected to the second straight hole section, and the large end of the conical hole section is connected to the first straight hole section.

[0006] According to a preferred embodiment, within the range of the first straight hole section, the width of the annular guide hole gradually increases in the direction from the first straight hole section toward the conical hole section.

[0007] According to a preferred embodiment, within the range of the conical hole section, the width of the annular guide hole gradually decreases in the direction of the conical hole section toward the second straight hole section.

[0008] According to a preferred embodiment, the distance between the end of the inner copper nozzle away from the adjusting seat and the end of the pressing copper nozzle away from the adjusting seat is D, where D = 3-5 mm.

[0009] According to a preferred embodiment, an adjusting shim is disposed between the inner copper nozzle and the mounting section.

[0010] According to a preferred embodiment, the nozzle further includes a dust extraction block, the dust extraction block having an assembly groove on its end face facing the adjusting seat, and an assembly hole penetrating through the bottom of the assembly groove; the pressing copper nozzle is mounted on the dust extraction block, and the assembly hole is coaxial with the welding hole; a dust extraction cylinder is coaxially mounted in the assembly hole, and a dust extraction gap is formed between the outer wall of the dust extraction cylinder and the inner wall of the assembly hole; an mounting ring is disposed at one end of the dust extraction cylinder facing the adjusting seat, and the mounting ring is mounted to the bottom of the assembly groove; a dust extraction hole is formed on the dust extraction block, and the dust extraction hole communicates with the dust extraction gap.

[0011] According to a preferred embodiment, the adjusting seat includes a pressure head mounting plate, a pressure head floating plate slidably disposed on the pressure head mounting plate in the vertical direction, and a limit block fixedly mounted on the pressure head mounting plate; a shoulder screw extending in the vertical direction is disposed on the pressure head floating plate, the shoulder screw passes through the limit block and is slidably connected to it, a floating spring is sleeved on the shoulder screw, and the floating spring is pressed between the pressure head floating plate and the limit block.

[0012] According to a preferred embodiment, a spring washer is slidably sleeved on the shoulder screw, the spring washer being located between the floating spring and the pressure head floating plate, and a pressure sensor is provided on the pressure head floating plate, the pressure sensor abutting against the spring washer.

[0013] According to a preferred embodiment, a driving pulley and a driven pulley are rotatably mounted on the pressure head floating plate. The driven pulley has a clearance hole coaxial with the welding hole. The driving pulley and the driven pulley are connected by a synchronous belt. The pressing copper nozzle is fixedly mounted on the driven pulley. A drive motor is assembled on the pressure head floating plate, and the drive motor is used to drive the driving pulley.

[0014] The technical solutions of the embodiments of the present invention have at least the following advantages and beneficial effects: The nozzle of this invention is a split design, which reduces the difficulty of processing. In use, the protective gas enters the gas gathering groove through the air inlet and is buffered and diffuses circumferentially along the annular guide hole. Then it overflows from the gas gathering groove and enters the second settling groove before entering the annular guide hole. During this process, the protective gas can be evenly distributed circumferentially in the annular guide hole, thereby achieving a more uniform output of the protective gas to the area around the weld point and good welding consistency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A three-dimensional structural schematic diagram of a copper nozzle presser foot fixture for laser welding provided in an embodiment of the present invention; Figure 2 This is a top view of the nozzle portion provided in an embodiment of the present invention; Figure 3 for Figure 2 Sectional view of section AA; Figure 4 This is a three-dimensional structural diagram of the nozzle portion provided in an embodiment of the present invention; Figure 5 An exploded view of the nozzle portion provided in an embodiment of the present invention; Figure 6 This is a three-dimensional structural diagram of the pressing copper nozzle provided in an embodiment of the present invention.

[0017] Icons: 1. Adjusting seat; 11. Pressure head mounting plate; 111. Limit block; 112. Shoulder screw; 113. Floating spring; 12. Pressure head floating plate; 121. Driving pulley; 122. Driven pulley; 1221. Clearance hole; 123. Synchronous belt; 124. Drive motor; 13. Spring washer; 14. Pressure sensor; 2. Pressure nozzle section; 21. Pressing copper nozzle; 211. First settling groove; 212. Second settling groove; 213. Flow guide hole ; 2131, First straight hole section; 2132, Conical hole section; 2133, Second straight hole section; 214, Assembly step; 2141, Air collection groove; 2142, Installation section; 215, Air inlet; 22, Inner liner copper nozzle; 221, Welding hole; 23, Annular guide hole; 24, Adjusting shim; 25, Dust extraction block; 251, Assembly groove; 252, Assembly hole; 253, Dust extraction hole; 26, Dust extraction cylinder; 261, Installation ring; 27, Dust extraction gap. Detailed Implementation

[0018] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0019] In the description of this invention, it should be noted that the terms "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 invention 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 invention.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0021] Please refer to Figures 1 to 6 A copper nozzle presser foot fixture for laser welding includes an adjusting base 1 and a presser part 2 rotatably mounted on the adjusting base 1. The presser part 2 includes a pressing copper nozzle 21 and an inner copper nozzle 22. The pressing copper nozzle 21 has a first recess 211 on its side facing the adjusting base 1. A second recess 212 is provided at the bottom of the first recess 211. A guide hole 213 is provided through the bottom of the second recess 212. The area at the bottom of the first recess 211 between the inner wall of the second recess 212 and the inner wall of the first recess 211 forms an assembly step 21. 4. An air-gathering groove 2141 is provided on the assembly step 214. The air-gathering groove 2141 is connected to the second sink 212. The area between two adjacent air-gathering grooves 2141 forms the installation section 2142. An air inlet 215 is provided on the pressing copper nozzle 21, which is connected to the air-gathering groove 2141. A welding hole 221 is provided through the inner copper nozzle 22. The end of the inner copper nozzle 22 away from the adjusting seat 1 is embedded in the outer guide hole 213 and forms an annular guide hole 23 with the outer guide hole 213. The inner copper nozzle 22 is installed on the assembly step 214. The nozzle part 2 is a split design, which reduces the processing difficulty. During use, the protective gas enters the gas gathering groove 2141 through the air inlet 215 and is buffered and diffuses circumferentially along the annular guide hole 23. Then it overflows the gas gathering groove 2141 and enters the second settling groove 212 before entering the annular guide hole 23. During this process, the protective gas can be evenly distributed circumferentially in the annular guide hole 23, thereby achieving a more uniform output of the protective gas to the weld point and good welding consistency.

[0022] like Figure 3 and Figure 6As shown, the flow guide hole 213 includes a first straight hole section 2131, a conical hole section 2132, and a second straight hole section 2133 connected in sequence. The second straight hole section 2133 is located at the end of the conical hole section 2132 away from the adjusting seat 1. The small end of the conical hole section 2132 is connected to the second straight hole section 2133, and the large end of the conical hole section 2132 is connected to the first straight hole section 2131. In this embodiment, the first straight hole section 2131 and the conical hole section 2132, together with the inner copper nozzle 22, form the flow guide hole 213, which is used to form an annular airflow from the protective gas from the gas gathering groove 2141. The second straight hole section 2133 is used to guide the annular airflow to the welding point area.

[0023] Within the first straight hole section 2131, the width of the annular guide hole 23 gradually increases in the direction from the first straight hole section 2131 toward the conical hole section 2132. This reduces the flow rate of the protective gas entering the annular guide hole 23, allowing the protective gas to be buffered and thus more uniform in the circumferential direction of the annular guide hole 23. Compared to the protective gas in the gas gathering groove 2141, the influence of the installation section 2142 is eliminated, thereby further ensuring the density consistency of the protective gas in the circumferential direction of the annular guide hole 23, which is beneficial to ensuring welding consistency.

[0024] Within the conical bore section 2132, the width of the annular guide hole 23 gradually decreases in the direction from the conical bore section 2132 toward the second straight bore section 2133. This increases the flow rate of the annular airflow, thereby better achieving the required welding atmosphere in the weld area.

[0025] like Figure 3 As shown, during use, the protective gas is buffered in the gas gathering groove 2141 and then enters the region of the annular guide hole 23 located in the first straight section. In this region, the width of the annular guide hole 23 gradually increases in the direction of the protective gas flow, and the flow velocity of the protective gas flowing into this region decreases to achieve buffering, which is conducive to the diffusion of the protective gas in the circumferential direction of the annular guide hole 23, so as to eliminate the influence of the mounting section 2142 and improve the consistency of the density in the circumferential direction of the annular guide hole 23. Subsequently, the protective gas enters the region of the annular guide hole 23 located in the conical hole section 2132. In this region, the width of the annular guide hole 23 gradually decreases in the direction of the protective gas flow, and the flow velocity of the protective gas gradually increases to form a high-speed annular protective gas flow, thereby creating a good atmosphere environment in the weld joint area, which is beneficial to improving the welding quality.

[0026] like Figure 3 and Figure 5 As shown, the shape of the end of the inner copper nozzle 22 away from the adjusting seat 1 is adapted to the shape of the conical hole section 2132. Specifically, the end of the inner copper nozzle 22 away from the adjusting seat 1 is frustoconical.

[0027] like Figure 3As shown, the distance between the end of the inner copper nozzle 22 furthest from the adjusting seat 1 and the end of the pressing copper nozzle 21 furthest from the adjusting seat 1 is D, where D = 3-5 mm. Preferably, D = 4 mm. This distance allows the protective gas to be evenly distributed in the weld area. It should be noted that during the welding process, the end of the pressing copper nozzle 21 furthest from the adjusting seat 1 abuts against the weldment (not shown in the figure).

[0028] In this embodiment, an adjusting shim 24 is disposed between the inner copper nozzle 22 and the mounting section 2142. The adjusting shim 24 is used to adjust the specific dimension of the distance D between the end of the inner copper nozzle 22 away from the adjusting seat 1 and the end of the pressing copper nozzle 21 away from the adjusting seat 1, to adapt to the needs of different processing environments. In use, the distance D can be adjusted by replacing the adjusting shims 24 with those of different thicknesses or by changing the number of adjusting shims 24 of the same thickness.

[0029] like Figure 3 and Figure 5 As shown, the nozzle part 2 also includes a dust extraction block 25. An assembly groove 251 is provided on the end face of the dust extraction block 25 facing the adjusting seat 1, and an assembly hole 252 is provided through the bottom of the assembly groove 251. The pressing copper nozzle 21 is installed on the dust extraction block 25, and the assembly hole 252 is coaxial with the welding hole 221. A dust extraction cylinder 26 is coaxially installed inside the assembly hole 252, and a dust extraction gap 27 is formed between the outer wall of the dust extraction cylinder 26 and the inner wall of the assembly hole 252. An installation ring 261 is provided at the end of the dust extraction cylinder 26 facing the adjusting seat 1, and the installation ring 261 is installed to the bottom of the assembly groove 251. A dust extraction hole 253 is provided on the dust extraction block 25, and the dust extraction hole 253 connects to the dust extraction gap 27. Dust generated during the welding process moves upward along the hole wall of the welding hole 221 under the action of airflow and is discharged through the dust extraction hole 253. It is understandable that a negative pressure device (not shown in the figure) is connected to the dust extraction hole 253. Dust removal by negative pressure device is a conventional technical means in this field, and will not be described in detail here.

[0030] like Figure 1 As shown, the adjusting seat 1 includes a pressure head mounting plate 11. A pressure head floating plate 12 is slidably mounted on the pressure head mounting plate 11 in the vertical direction. A limiting block 111 is fixedly mounted on the pressure head mounting plate 11. A shoulder screw 112 extending in the vertical direction is provided on the pressure head floating plate 12. The shoulder screw 112 passes through the limiting block 111 and is slidably connected to it. A floating spring 113 is sleeved on the shoulder screw 112. The floating spring 113 is pressed between the pressure head floating plate 12 and the limiting block 111. In use, when the pressure nozzle 2 abuts against the weldment, the floating spring 113 provides buffering, so that the copper nozzle pressure foot fixture makes flexible contact with the weldment, avoiding damage to the weldment.

[0031] In this embodiment, a spring washer 13 is slidably sleeved on the shoulder screw 112. The spring washer 13 is located between the floating spring 113 and the pressure head floating plate 12. A pressure sensor 14 is provided on the pressure head floating plate 12, and the pressure sensor 14 abuts against the spring washer 13. The pressure sensor 14 can provide real-time feedback on the clamping force to ensure that the pressure applied to the weldment by the pressure nozzle 2 (specifically the pressure-closing copper nozzle 21) does not exceed the threshold value.

[0032] like Figure 1 As shown, a driving pulley 121 and a driven pulley 122 are rotatably mounted on the pressure head floating plate 12. A clearance hole 1221, coaxial with the welding hole 221, is provided through the driven pulley 122. The driving pulley 121 and the driven pulley 122 are connected by a synchronous belt 123. The pressing copper nozzle 21 is fixedly mounted on the driven pulley 122. A drive motor 124 is mounted on the pressure head floating plate 12, which drives the driving pulley 121. In this embodiment, the clearance hole 1221 communicates with the welding hole 221. A laser beam (not shown) passes through the clearance hole 1221, enters the welding hole 221, and is projected onto the weldment. In use, the driven pulley 122 is driven to rotate, thereby driving the pressing nozzle 2 to perform circumferential adjustment, thus adapting to different welding environments.

[0033] The technical means disclosed in this invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications are also considered within the scope of protection of this invention.

Claims

1. A copper tip presser tool for laser welding, characterized by, The system includes an adjusting seat and a pressure nozzle rotatably mounted on the adjusting seat. The pressure nozzle includes a pressing copper nozzle and an inner copper nozzle, wherein: The pressing copper nozzle has a first groove on one side facing the adjusting seat. A second groove is provided at the bottom of the first groove. A guide hole is provided through the bottom of the second groove. The area at the bottom of the first groove between the inner wall of the second groove and the inner wall of the first groove forms an assembly step. An air-gathering groove is provided on the assembly step. The air-gathering groove is connected to the second groove. The area between two adjacent air-gathering grooves forms an installation section. An air inlet is provided on the pressing copper nozzle, which is connected to the air-gathering groove. The inner copper nozzle has a through welding hole. The end of the inner copper nozzle away from the adjusting seat is embedded in the outer guide hole and forms an annular guide hole with the outer guide hole. The inner copper nozzle is installed on the assembly step.

2. The copper nozzle presser foot fixture for laser welding according to claim 1, characterized in that, The flow guide outer hole includes a first straight hole section, a conical hole section, and a second straight hole section connected in sequence. The second straight hole section is located at the end of the conical hole section away from the adjusting seat. The small end of the conical hole section is connected to the second straight hole section, and the large end of the conical hole section is connected to the first straight hole section.

3. The copper nozzle presser foot fixture for laser welding according to claim 2, characterized in that, Within the first straight hole section, the width of the annular guide hole gradually increases in the direction from the first straight hole section toward the conical hole section.

4. The copper nozzle presser foot fixture for laser welding according to claim 2, characterized in that, Within the conical bore section, the width of the annular guide hole gradually decreases in the direction from the conical bore section toward the second straight bore section.

5. The copper nozzle presser foot fixture for laser welding according to claim 1, characterized in that, The distance between the end of the inner copper nozzle away from the adjusting seat and the end of the pressing copper nozzle away from the adjusting seat is D, where D = 3-5mm.

6. The copper nozzle presser foot fixture for laser welding according to claim 1, characterized in that, An adjusting shim is provided between the inner copper nozzle and the mounting section.

7. The copper nozzle presser foot fixture for laser welding according to claim 1, characterized in that, The nozzle part also includes a dust extraction block, and the end face of the dust extraction block facing the adjustment seat is provided with an assembly groove, and the bottom of the assembly groove is provided with an assembly hole. The pressing copper nozzle is installed on the dust extraction block and the assembly hole is coaxial with the welding hole; A dust extraction cylinder is coaxially mounted in the assembly hole, and a dust extraction gap is formed between the outer wall of the dust extraction cylinder and the inner wall of the assembly hole. An installation ring is provided at the end of the dust extraction cylinder facing the adjustment seat, and the installation ring is assembled to the bottom of the assembly groove. The dust extraction block has a dust extraction hole, which is connected to the dust extraction gap.

8. The copper nozzle presser foot fixture for laser welding according to claim 1, characterized in that, The adjusting seat includes a pressure head mounting plate, on which a pressure head floating plate is slidably disposed in the vertical direction, and a limit block is fixedly mounted on the pressure head mounting plate; The pressure head floating plate is provided with a shoulder screw extending in the vertical direction. The shoulder screw passes through the limiting block and is slidably connected to it. A floating spring is sleeved on the shoulder screw, and the floating spring is pressed between the pressure head floating plate and the limiting block.

9. The copper nozzle presser foot fixture for laser welding according to claim 8, characterized in that, A spring washer is slidably fitted on the outer side of the shoulder screw. The spring washer is located between the floating spring and the pressure head floating plate. A pressure sensor is provided on the pressure head floating plate and abuts against the spring washer.

10. The copper nozzle presser foot fixture for laser welding according to claim 8, characterized in that, The pressure head floating plate is rotatably mounted with a driving pulley and a driven pulley. The driven pulley is provided with a clearance hole coaxial with the welding hole. The driving pulley and the driven pulley are connected by a synchronous belt. The pressing copper nozzle is fixedly installed on the driven pulley. A drive motor is mounted on the pressure head floating plate, and the drive motor is used to drive the drive pulley.

Images