A dual-path gas protection device for high-power laser processing head

Abstract

The present invention relates to the technical field of laser processing head protection devices, specifically a dual-path gas protection device for a high-power laser processing head, comprising a mounting base, a gas knife component 1 and a gas knife component 2, the mounting base comprising two side plates and a bottom plate fixedly connected between the two side plates, a processing through hole being provided on the bottom plate, the lower end of the gas knife component 2 being fixedly connected between the two side plates, the gas knife component 1 being arranged between the two side plates at the lower end of the gas knife component 2, and a flow dividing device for dividing the blown gas into two and blowing them to the gas knife component 1 and the gas knife component 2 respectively being installed on one side of the gas knife component 1 and the gas knife component 2. This design solves the problem that when the laser processing head is working, the reflux of powder and welding slag is not well restricted, resulting in a large amount of loss of the protective lens of the laser processing head. The present invention has a simple structure, greatly reduces the possibility of damage to the protective lens, thereby saving production costs.

Description

Technical Field

[0001] The invention relates to the technical field of laser processing head protection devices, in particular to a dual-path gas protection device for a high-power laser processing head. Background Art

[0002] The laser processing head protection device plays a role in protecting the laser processing head during laser processing. It uses protective gas to pass through the laser processing head protection device to limit the backflow of powder and welding slag during laser processing, so as to prevent the protection lens of the laser processing head from being damaged. However, the gas protection devices on the market are all single-channel protection. When the laser processing head is working, it does not well limit the backflow of powder and welding slag, resulting in a large loss of the laser processing head protection lens, thereby greatly increasing the cost of laser processing. Summary of the invention

[0003] The technical problem solved by the present invention is: when the laser processing head is working, the reflux of powder and welding slag is not well restricted, resulting in a large amount of loss of the protective lens of the laser processing head. The technical solution adopted by the present invention to solve the technical problem is: a dual-path gas protection device for an efficient laser processing head, comprising a mounting base, a gas knife component 1 and a gas knife component 2, the mounting base comprising two side plates and a bottom plate fixedly connected between the two side plates, the bottom plate being provided with a processing through hole, the lower end of the gas knife component 2 being fixedly connected between the two side plates, the gas knife component 1 being arranged between the two side plates at the lower end of the gas knife component 2, and a diversion device for dividing the blown gas into two and blowing them respectively to the gas knife component 1 and the gas knife component 2 is installed on one side of the gas knife component 1 and the gas knife component 2.

[0004] Specifically, the gas knife assembly 1 includes a first gas knife, a second gas knife, and a third gas knife fixedly connected between the first gas knife and the second gas knife, one side of the third gas knife is provided with an air inlet, and the other side of the third gas knife is provided with an air outlet. When the protective gas from the air outlet is blown out, the air pressure of the air flow in the horizontal direction is increased, and the air pressure below will cause it to flow upward, but the downward pressure airflow through the gas knife assembly 2 will cause the upward airflow to be squeezed in a parallel direction, so that the gas protection device greatly limits the backflow of powder and welding slag, and greatly reduces the possibility of damage to the protective lens. Specifically, the upper end of the gas knife assembly 2 is provided with a first mounting hole, and a protective lens buckle assembly is installed in the first mounting hole. An annular air outlet gap is formed between the protective lens buckle assembly and the first mounting hole, and one side of the gas knife assembly 2 is provided with an oblique first through hole connected to the annular air outlet gap. The protective gas through the oblique through hole can be transported downward from the gas gap spirally and annularly to form a downward high-pressure gas, which can not only protect the protective lens in all directions, but also make the airflow of the gas knife assembly below change from a divergent arc to a horizontal airflow by squeezing.

[0005] Specifically, the diverter device includes a one-way gas divider, a blocking wire and a vent joint. A second through hole is provided above the one-way gas divider, the depth of which is between the first gas knife and the second gas knife and is connected to the air inlet. The upper side of the one-way gas divider is provided with a diverter hole that connects the second through hole with the first through hole. The middle part of one side of the one-way gas divider is provided with a second mounting hole for matching the installation of the vent joint. The second mounting hole is connected to the second through hole. The blocking wire is rotatably connected to the second through hole above the one-way gas divider for adjusting the gas flow of the diverter hole. This structure can make the maximum pressure of the incoming gas be evenly divided into two paths, and respectively delivered to the gas knife component one and the gas knife component two. Specifically, the protective mirror buckle component is connected to the inner side of the gas knife component two and is set in a downward conical shape. Through the inner tapered downward design, the incoming gas pressure can be increased to ensure the optimal utilization of the protective gas.

[0006] Specifically, an air knife baffle is provided at the lower end of the one-to-two air divider on one side of the third air knife. The air knife baffle can block the rebound of a part of powder and welding slag, and the reflection of a part of laser, thus well protecting the laser processing head, the laser and the optical fiber.

[0007] The beneficial effects of the present invention are:

[0008] (1) The present invention provides a dual-path gas protection device for a high-power laser processing head. A flow dividing device is installed on one side of the first gas knife component and the second gas knife component to divide the blown gas into two paths and blow them to the first gas knife component and the second gas knife component respectively, so that the maximum pressure of the incoming gas is evenly divided into two paths and transported to the first gas knife component and the second gas knife component respectively, thereby increasing the air pressure of the air flow in the horizontal direction. At this time, the air pressure below will cause it to flow upward, but the downward pressure airflow through the second gas knife component will cause the upward airflow to be squeezed in a parallel direction. In this way, the gas protection device greatly limits the backflow of powder and welding slag, greatly reduces the possibility of damage to the protective lens, and thus saves production costs;

[0009] (2) The present invention provides a dual-path gas protection device for a high-power laser processing head. By installing a protective lens buckle assembly in the first mounting hole at the upper end of the second gas knife assembly, the time for replacing the protective lens of the laser processing head is saved, thereby improving the efficiency of laser processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the dual-path gas protection device of the present invention;

[0011] Figure 2 for Figure 1 A partial cross-sectional view of the dual-path gas protection device;

[0012] Figure 3It is a rear view of the dual-path gas protection device of the present invention;

[0013] Figure 4 It is a front view of the dual-path gas protection device of the present invention;

[0014] Figure 5 for Figure 4 Sectional view along AA direction;

[0015] In the figure: 1. Air knife component 1, 2. Air knife component 2, 3. Diverter device, 4. Air knife baffle, 5. Mounting base, 11. First air knife, 12. Second air knife, 13. Third air knife, 14. Air inlet, 15. Air outlet, 21. First mounting hole, 22. Protective mirror buckle component, 23. Annular air outlet gap, 24. First through hole, 31. One-to-two air divider, 32. Blocking wire, 33. Ventilation joint, 34. Second through hole, 35. Diverter hole, 36. Second mounting hole, 51. Side panel, 52. Bottom panel, 53, Processing through hole. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] according to Figure 1-Figure 5 As shown, the present invention provides a technical solution, a dual-path gas protection device for a high-efficiency laser processing head, comprising a mounting base 5, an air knife component 1 and an air knife component 2, the mounting base 5 comprising two side plates 51 and a bottom plate 52 fixedly connected between the two side plates 51, the bottom plate 52 being provided with a processing through hole 53, the lower end of the air knife component 2 being fixedly connected between the two side plates 51, the air knife component 1 being arranged between the two side plates 51 at the lower end of the air knife component 2, a diversion device 3 for dividing the blown gas into two and blowing them respectively to the air knife component 1 and the air knife component 2 is installed on one side of the air knife component 1 and the air knife component 2.

[0018] In a specific embodiment, an air knife assembly includes a first air knife 11, a second air knife 12, and a third air knife 13 fixedly connected between the first air knife 11 and the second air knife 12. An air inlet 14 is provided on one side of the third air knife 13, and an air outlet 15 is provided on the other side of the third air knife.

[0019] In a specific embodiment, a first mounting hole 21 is provided at the upper end of the air knife component 2, a protective mirror buckle component 22 is installed in the first mounting hole 21, an annular air outlet gap 23 is formed between the protective mirror buckle component 22 and the first mounting hole 21, and a first oblique through hole 24 connected to the annular air outlet gap 23 is provided on one side of the air knife component 2.

[0020] In a specific embodiment, the diverter device 3 includes a one-way gas divider 31, a blocking wire 32 and a ventilation joint 33. A second through hole 34 is provided above the one-way gas divider 31, and the depth is between the first gas knife 11 and the second gas knife 12 and is connected to the air inlet 14. The upper side of the one-way gas divider 31 is provided with a diverter hole 35 connecting the second through hole 34 with the first through hole 24. A second mounting hole 36 for cooperating with the ventilation joint 33 is provided in the middle of one side of the one-way gas divider 31. The second mounting hole 36 is connected to the second through hole 34. The blocking wire 32 is rotatably connected to the second through hole 34 above the one-way gas divider 31 for adjusting the gas flow of the diverter hole 35.

[0021] In a specific embodiment, the protective mirror buckle assembly 22 is connected to the inner side of the second air knife assembly 2 and is arranged in a downward conical shape.

[0022] In a specific implementation, an air knife baffle 4 is provided at the lower end of the one-to-two air divider 31 , which is located on one side of the third air knife 13 .

[0023] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A dual-path gas protection device for an efficient laser processing head, comprising a mounting base (5), a gas knife component (1) and a gas knife component (2), wherein the mounting base (5) comprises two side plates (51) and a bottom plate (52) fixedly connected between the two side plates (51), the bottom plate (52) being provided with a processing through hole (53), the lower end of the gas knife component (2) being fixedly connected between the two side plates (51), the gas knife component (1) being arranged between the two side plates (51) and at the lower end of the gas knife component (2), characterized in that: A flow dividing device (3) is installed on one side of the air knife component 1 (1) and the air knife component 2 (2) to divide the blown gas into two parts and blow them respectively to the air knife component 1 (1) and the air knife component 2 (2); The air knife assembly comprises a first air knife (11), a second air knife (12), and a third air knife (13) fixedly connected between the first air knife (11) and the second air knife (12), wherein an air inlet (14) is provided on one side of the third air knife (13), and an air outlet (15) is provided on the other side of the third air knife; The upper end of the second air knife component (2) is provided with a first mounting hole (21), a protective mirror buckle component (22) is mounted in the first mounting hole (21), an annular air outlet gap (23) is formed between the protective mirror buckle component (22) and the first mounting hole (21), and one side of the second air knife component (2) is provided with an oblique first through hole (24) communicating with the annular air outlet gap (23); The flow dividing device (3) comprises a one-to-two gas divider (31), a blocking wire (32) and a vent joint (33); a second through hole (34) is provided above the one-to-two gas divider (31) and is located between the first gas knife (11) and the second gas knife (12) and is connected to the gas inlet (14); a flow dividing hole (35) is provided on the upper side of the one-to-two gas divider (31) and connects the second through hole (34) with the first through hole (24); a second mounting hole (36) is provided in the middle of one side of the one-to-two gas divider (31) and is used to match the vent joint (33) for installation; the second mounting hole (36) is connected to the second through hole (34); the blocking wire (32) is rotatably connected to the second through hole (34) above the one-to-two gas divider (31) and is used to adjust the gas flow of the flow dividing hole (35).

2. The dual-path gas protection device for a high-efficiency laser processing head according to claim 1, characterized in that: The protective mirror buckle component (22) is connected to the inner side of the second air knife component (2) and is arranged in a downwardly conical shape.

3. The dual-path gas protection device for a high-efficiency laser processing head according to claim 1, characterized in that: An air knife baffle (4) is provided at the lower end of the one-to-two air divider (31) and located on one side of the third air knife (13).

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