A laser welding copper nozzle structure capable of effectively guiding the direction of the shielding gas flow

Abstract

The utility model discloses a kind of effectively guiding laser welding copper nozzle structure of protective airflow, belong to welding technical field, including inner lining and pressure head, inner lining and pressure head are conical, inner lining is embedded in the inside of pressure head, one end of pressure head is equipped with gas outlet, the other end of pressure head is fixedly connected with fixed block assembly, the other end of fixed block assembly is fixedly connected with quick-change shaft;The outer side wall of inner lining is equipped with sector groove, when inner lining is pressed tightly by pressure head inner side wall, sector groove and the inner side wall between pressure head form guiding flow channel, the opening of one end of guiding flow channel is equipped in one side of gas outlet;One side of pressure head is equipped with nitrogen gas connecting threaded hole connected with nitrogen gas pipe, nitrogen gas connecting threaded hole is communicated with guiding flow channel.The utility model has the advantages that: avoid waste protective gas, and have quick-change function, pressure regulation is convenient.

Description

Technical Field

[0001] This utility model relates to the field of welding technology, specifically to a laser welding copper nozzle structure that can effectively guide the direction of protective gas flow. Background Technology

[0002] Traditional copper nozzles used in welding have the following disadvantages.

[0003] 1. Defects in the flow guiding structure: Single-channel direct injection: The protective gas diffuses in a cone shape, creating a 3-5mm "blind zone" on both sides of the weld; Static flow channel: cannot adapt to changes in welding posture (flat / vertical / overhead), resulting in increased oxide scale during overhead welding.

[0004] 2. Inefficient pressure regulation: Mechanical locking adjustment: The threaded pressure head needs to be repeatedly disassembled and calibrated, and the average time for changing the type is more than 10 minutes; Rigid connection: Replacing the spring requires disassembling the entire base, resulting in high maintenance costs.

[0005] 3. Lack of modularity: Specialized design: The copper nozzle is strongly tied to the robot model, and the cross-production line development cycle is 6-8 weeks; Excessive scrapping: The pressure head wears out and the entire set of copper nozzles needs to be replaced (costing only 25%), resulting in high annual waste.

[0006] 4. Difficulty in integrating dust collection systems: Split system: The dust hood and copper nozzle are separate, which increases the space occupied on the production line.

[0007] The above-mentioned disadvantages lead to uneven airflow distribution in traditional copper nozzles, resulting in more than 35% of the gas not covering the weld; and a high oxidation defect rate: turbulent air entrainment causes the porosity of aluminum alloy welding to reach 8%-12% (ideal value <1%); in severe cases, it leads to frequent equipment shutdowns: spatter clogging pores causes production line downtime. Utility Model Content

[0008] The present invention aims to solve at least one of the technical problems mentioned in the background art above, and to provide a laser welding copper nozzle structure that can effectively guide the direction of protective airflow.

[0009] Based on the above objectives, the technical solution provided by this utility model is as follows: a laser welding copper nozzle structure that can effectively guide the direction of protective airflow, including an inner liner and a pressure head, the inner liner and the pressure head are conical, the inner liner is embedded inside the pressure head, one end of the pressure head is provided with an air outlet, the other end of the pressure head is fixedly connected to a fixing block assembly, and the other end of the fixing block assembly is fixedly connected to a quick-change shaft. The outer wall of the liner is provided with a fan-shaped groove. When the inner wall of the pressure head presses the liner, a guide channel is formed between the fan-shaped groove and the inner wall of the pressure head. One end of the guide channel is opened on one side of the air outlet. One side of the pressure head is provided with a nitrogen connection threaded hole for connecting to the nitrogen pipe, and the nitrogen connection threaded hole is connected to the guide flow channel.

[0010] In some embodiments, the fixing block assembly includes a first fixing block and a second fixing block. One end of the first fixing block is fixedly connected to the pressure head, and the other end of the first fixing block is provided with a square tube that is retractably disposed inside the second fixing block. The other end of the second fixing block is fixedly connected to a quick-change shaft.

[0011] In some embodiments, the square tube is slidably connected within the second fixing block, and the periphery of the first fixing block is provided with an elastic element that is connected to the periphery of the second fixing block.

[0012] In some embodiments, a dust removal hole is provided on one side of the first fixing block, and the dust removal hole communicates with the internal space of the lining.

[0013] In some embodiments, the quick-change shaft is provided with an annular groove, and the quick-change shaft is connected to the quick-release port of the welding machine through the annular groove.

[0014] In some embodiments, the quick-change shaft has a first pin hole at one end near the second fixing block, the second fixing block has a contour mounting groove, the contour mounting groove has a second pin hole, and the first pin hole and the second pin hole are connected by a pin.

[0015] The advantages of this utility model compared with the prior art are as follows: 1. The fan-shaped guide channel delivers the protective gas directly to the welding surface, and the channel length can well cover the entire welding surface. At the same time, a dust removal hole is opened above the first fixed block connected to the copper nozzle pressure head. This channel can not only prevent the protective gas from being interfered with by suction when it is delivered, but also form a loop with it, increasing the coverage of the protective gas on the welding surface; 2. The fixed block assembly is modularized, and the springs can be of various specifications. When changing the type, the entire set of copper nozzles can be removed through the quick-change shaft, and then the spring model can be replaced, which shortens the changeover time; 3. The quick-change shaft can realize the quick-change function of the entire set of copper nozzles; 4. The conical copper nozzle design is adopted to ensure the largest possible compatible welding area while avoiding interference; 5. A larger fixed block assembly is provided to ensure the size of the pressure head, which can adapt to a larger welding area.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the copper nozzle according to an embodiment of the present utility model; Figure 2 yes Figure 1 The diagram shows a vertical section of the copper nozzle. Figure 3 yes Figure 1 The diagram shows a copper nozzle mounted on a dust collection pipe. Figure 4 This is a three-dimensional structural diagram of the pressure head according to an embodiment of the present invention; Figure 5 yes Figure 4 The schematic diagram of the pressure head structure shown is shown below; Figure 6 yes Figure 5 The diagram shows a left-side view of the pressure head. Figure 7 yes Figure 5 The diagram shows a cross-sectional view of the pressure head AA. Figure 8 yes Figure 5 The diagram shows a cross-sectional view of the pressure head BB. Figure 9 This is a three-dimensional structural schematic diagram of the lining according to an embodiment of the present utility model; Figure 10 yes Figure 9 A schematic diagram of the inner lining structure shown; Figure 11 yes Figure 10 A cross-sectional view of the BB portion of the inner lining shown in the diagram; Figure 12 This is a three-dimensional structural schematic diagram of the first fixing block according to an embodiment of the present utility model; Figure 13 This is a schematic diagram of the structure of the first fixing block according to an embodiment of the present utility model; Figure 14 yes Figure 13 A schematic diagram of the first fixed block shown in the left view; Figure 15 yes Figure 13 A top view of the first fixing block shown in the diagram; Figure 16 yes Figure 15 A schematic cross-sectional view of the first fixing block shown in the figure; Figure 17 This is a three-dimensional structural schematic diagram of the second fixing block according to an embodiment of the present invention; Figure 18 This is a schematic diagram of the structure of the second fixing block according to an embodiment of the present invention; Figure 19 yes Figure 18 A cross-sectional view of the second fixing block AA shown in the figure; Figure 20 This is a schematic diagram of the quick-change shaft structure according to an embodiment of the present invention; Figure 21 yes Figure 20The diagram shows a cross-sectional view of the quick-change shaft AA. Figure 22 yes Figure 20 The diagram shows a cross-sectional view of the quick-change shaft AA. In the attached diagram: 1. Pressure head; 2. Liner; 3. First fixing block; 4. Second fixing block; 5. Quick-change shaft; 6. Bolt connection hole; 7. Pin hole; 8. Elastic element; 11. Nitrogen connection threaded hole; 12. Gas outlet; 21. Fan-shaped groove; 31. Dust removal hole; 32. Square tube; 41. Square hole; 42. Contour mounting groove; 51. Annular groove. Detailed Implementation

[0018] The present invention will now be described in further detail.

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0020] Combination Figure 1 The laser welding copper nozzle structure shown in this embodiment can effectively guide the flow of protective gas. Through innovative designs such as flow channel guidance, elastic pressure regulation, dust removal integration, conical copper nozzle, and large base, it systematically solves industry problems such as protective gas waste, inefficient changeover, and equipment interference.

[0021] Combination Figure 1 , Figure 2 As shown, the copper nozzle in this embodiment mainly includes an inner liner 2, a pressure head 1, a first fixing block 3, a second fixing block 4, and a quick-change shaft 5. The inner liner 2 and the pressure head 1 are in the shape of a four-sided cone. The inner liner 2 is embedded inside the pressure head 1. The left end of the pressure head 1 is provided with an air outlet 12. The right end of the pressure head 1 is fixedly connected to the first fixing block 3 by bolts. The right end of the first fixing block 3 is provided with a square tube 32. The square tube 32 can slide telescopically in the square hole 41 of the second fixing block 4. The right end of the second fixing block 4 is fixedly connected to the quick-change shaft 5 by bolts.

[0022] Combination Figure 3 , Figure 12 As shown, the upper side of the first fixing block 3 is provided with a dust removal hole 31, which is connected to the internal space of the inner lining 2. A dust removal pipe is fixedly connected to the dust removal hole 31 by bolts.

[0023] Combination Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, the frame of the pressure head 1 is positioned with the first fixing block 3 by a pin and connected to the first fixing block 3 by bolts. The two sides of the pressure head 1 are provided with nitrogen connection threaded holes 11 for connecting to the nitrogen pipe.

[0024] Combination Figure 9 , Figure 10 , Figure 11 As shown, the outer wall of the liner 2 is provided with a fan-shaped groove 21. When the inner wall of the pressure head 1 presses the liner 2 tightly, a guide channel is formed between the fan-shaped groove 21 and the inner wall of the pressure head 1. The nitrogen connection threaded hole 11 is connected to the guide channel. The guide opening of the guide channel is located on one side of the gas outlet 12 for nitrogen protection of the welding work point. Combination Figure 12 , Figure 13 , Figure 14 , Figure 15 , Figure 16 As shown, the square tube 32 is slidably connected to the square hole 41 of the second fixing block 4, and the four corners of the periphery of the first fixing block 3 are connected to the four corners of the periphery of the second fixing block 4 using long bolts. An elastic element 8 (spring) is sleeved on the long bolt.

[0025] Combination Figure 17 , Figure 18 , Figure 19 As shown, the second fixing block 4 includes a square hole 41 and a contoured mounting groove 42. The square hole 41 is used to connect the square tube 32 of the first fixing block 3. The contoured mounting groove 42 is used to install the quick-release shaft. The upper end of the contoured mounting groove 42 is provided with a vertical pin hole 7. The bottom of the contoured mounting groove 42 is provided with multiple bolt connection holes 6 for fixing with the quick-release shaft.

[0026] Combination Figure 20 , Figure 21 , Figure 22 As shown, the quick-change shaft 5 is provided with an annular groove 51, and the quick-change shaft 5 is connected to the quick-release port of the welding machine through the annular groove 51.

[0027] When using the copper nozzle in this embodiment: (1) Implementation of the flow guiding structure: Step 1: Connect the nitrogen tube (i.e., the protective gas tube, not shown in the figure) to the nitrogen connection threaded holes 11 on the left and right sides of the pressure head 1 through the threaded joint to ensure airtightness; Step 2: Insert the inner liner 2 into the inner cavity of the pressure head 1, so that the fan-shaped groove on the outer side of the inner liner 2 forms a guide flow channel with the inner wall of the pressure head 1; Step 3: Install the dust removal pipe onto the dust removal hole 31 of the first fixing block 3. Connect the other end of the dust removal pipe to the dust removal machine to allow backflow during welding.

[0028] (2) Implementation of the rapid pressure regulation system: Step 1: Disassemble the copper nozzle from the welding equipment. Rotate the entire copper nozzle to separate the quick-change shaft 5 of the copper nozzle from the welding equipment. Step 2: Remove the four long bolts connecting the second fixing block 4 and the first fixing block 3, and take out the original spring assembly; Step 3: Select a new spring assembly based on the thickness of the welding material. After installation, tighten the long bolt to achieve rapid pressure adjustment of the copper nozzle, while also accommodating the connection of the quick-change shaft 5.

[0029] (3) Implementation of compact integrated dust removal device: A dust removal hole 31 is machined above the first fixed block 3 to avoid direct communication with the inner cavity of the pressure head 1.

[0030] (4) Implementation of quick changeover interface: The entire copper nozzle is removed by rotating the quick-change shaft 5, thus separating the copper nozzle assembly from the welding equipment, thereby achieving quick replacement.

[0031] (5) Conical copper nozzle and large base: The first fixing block 3 is designed to be larger than the traditional structure, with pre-drilled threaded holes for installing pressure heads 1 of different sizes; when replacing the copper nozzle, only the four bolts and two pins of the pressure head 1 and the inner liner 2 need to be removed, while the base and equipment connection are retained.

[0032] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A laser welding copper nozzle structure that can effectively guide the direction of protective gas flow, characterized in that: It includes a liner (2) and a pressure head (1). The liner (2) and the pressure head (1) are conical. The liner (2) is embedded inside the pressure head (1). One end of the pressure head (1) is provided with an air outlet (12). The other end of the pressure head (1) is fixedly connected to a fixing block assembly. The other end of the fixing block assembly is fixedly connected to a quick-change shaft (5). The outer wall of the liner (2) is provided with a fan-shaped groove (21). When the inner wall of the pressure head (1) presses the liner (2), a guide channel is formed between the fan-shaped groove (21) and the inner wall of the pressure head (1). One end of the guide channel is opened on one side of the air outlet (12). The pressure head (1) has a nitrogen connection threaded hole (11) on one side that is connected to the nitrogen pipe, and the nitrogen connection threaded hole (11) is connected to the guide flow channel.

2. The laser welding copper nozzle structure that can effectively guide the protective gas flow according to claim 1, characterized in that: The fixing block assembly includes a first fixing block (3) and a second fixing block (4). One end of the first fixing block (3) is fixedly connected to the pressure head (1), and the other end of the first fixing block (3) is provided with a square tube (32). The square tube (32) is telescopically located inside the second fixing block (4), and the other end of the second fixing block (4) is fixedly connected to a quick-change shaft (5).

3. The laser welding copper nozzle structure that can effectively guide the protective gas flow direction according to claim 2, characterized in that: The square tube (32) is slidably connected to the second fixing block (4), and the periphery of the first fixing block (3) is provided with an elastic element (8) that is connected to the periphery of the second fixing block (4).

4. The laser welding copper nozzle structure that can effectively guide the protective gas flow direction according to claim 2, characterized in that: The first fixing block (3) has a dust removal hole (31) on one side, and the dust removal hole (31) is connected to the internal space of the liner (2).

5. The laser welding copper nozzle structure that can effectively guide the protective gas flow according to claim 1, characterized in that: The quick-change shaft (5) is provided with an annular groove (51), and the quick-change shaft (5) is connected to the quick-release port of the welding machine through the annular groove (51).

6. The laser welding copper nozzle structure that can effectively guide the protective gas flow according to claim 2, characterized in that: The quick-change shaft (5) has a pin hole (7) at one end near the second fixing block (4). The second fixing block (4) has a contour mounting groove (42), which also has a pin hole (7). The two pin holes (7) are connected by a pin, thereby positioning the quick-change shaft (5) during installation.

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