A splash protection device for laser cutting machine cutting head

Abstract

This utility model discloses a splash-proof protection device for a laser cutting machine cutting head, relating to the technical field of laser cutting. It includes a laser housing, a gun head, an arc-shaped protective plate, and an air intake box. The gun head is located on the outer side of the laser housing, and multiple sets of air injection pipes are evenly spaced on the outer side of the laser housing. An electric cylinder connector is connected to the top of the laser housing. A protective mechanism is located on the outer side of the gun head. This protective mechanism uses the arc-shaped protective plate on the outer side to disperse the diffused laser energy during the gun head's operation. One or two sets of arc-shaped protective plates can be installed or adjusted according to usage requirements. A purification mechanism is located on one side of the laser housing. The height of the annular guide rail is adjusted by vertical protrusions on the outer side of the gun head. The height of the arc-shaped protective plate is adjusted according to the size of the gun head and the size of the arc-shaped protective plate.

Description

Technical Field

[0001] This utility model relates to the technical field of laser cutting, specifically to a splash protection device for the cutting head of a laser cutting machine. Background Technology

[0002] Laser cutting has been widely used in recent years, especially in the field of metal cutting. Since the process of cutting metal is also a process of melting metal at high temperatures, it inevitably produces metal vapor and cutting spatter, both of which can significantly damage the laser focusing lens.

[0003] The molten metal slag and dust generated by the cutting head during cutting can contaminate the lens. Anti-splash devices (such as protective lenses, sealing rings, etc.) form a physical isolation layer to prevent impurities from adhering to the surface of the focusing lens and collimating lens, thus maintaining the quality of beam transmission. However, a fixed protective structure is not very effective in protecting the cutting head according to changes in the processing position of the workpiece. Utility Model Content

[0004] The purpose of this invention is to provide a splash protection device for the cutting head of a laser cutting machine, so as to solve the above-mentioned defects caused by the prior art.

[0005] A splash protection device for a laser cutting machine includes a laser housing, a gun head, an arc-shaped protective plate, and an air intake box. The gun head is located on the outer side of the laser housing, and multiple sets of air injection pipes are evenly spaced on the outer side of the laser housing. An electric cylinder connector is connected to the top of the laser housing. A protective mechanism is located on the outer side of the gun head. The protective mechanism disperses the diffuse reflection laser energy during the operation of the gun head through the arc-shaped protective plate. One or two sets of arc-shaped protective plates can be installed or adjusted according to usage requirements. A purification mechanism is located on one side of the laser housing. The purification mechanism forms a directional airflow field in the cutting area, quickly drawing the metal vapor and dust generated during cutting into the air intake box, assisting the protective mechanism in splash protection of the gun head, and preventing the spread and pollution of the working environment.

[0006] Preferably, the protective mechanism includes an arc-shaped guard plate, an annular guide rail, an adjustable ring body, vertical protrusions, and positioning holes. The inner end of the arc-shaped guard plate is connected to the annular guide rail, and the outer side of the annular guide rail is connected to the adjustable ring body. The outer side of the adjustable ring body is provided with multiple sets of vertical protrusions. The vertical protrusions are connected to the inner end of the annular guide rail by grooves. The outer side of the annular guide rail is provided with multiple positioning holes at equal intervals. The annular guide rail is connected to one side of the arc-shaped guard plate by an arc-shaped slider on its outer side.

[0007] Preferably, the gun head is connected to the inner end slider of the annular guide rail via a vertical protrusion on the outer side.

[0008] Preferably, the annular guide rail is connected to the outer end of the vertical protrusion by a positioning hole on the outer side, and the width of the annular guide rail is one-quarter of the width of the adjusting ring body.

[0009] Preferably, the purification mechanism includes an air intake box, an intake pipe, a purification filter, a fan, and an exhaust screen. The air intake box is installed on one side of the laser housing. The bottom of the air intake box is connected to the intake pipe, which is arranged parallel to the arc-shaped protective plate. The air intake box contains a purification filter. A fan is located directly above the purification filter. An exhaust screen is located on one side of the fan. The air intake box is connected through the outer side of the exhaust screen.

[0010] Preferably, the inhalation tube is connected to the output end of the fan via a purification filter element located at its top.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] 1. The height of the circular guide rail is adjusted by the vertical protrusions on the outer side of the gun head. On the one hand, the height of the arc-shaped guard plate is adjusted according to the size of the gun head and the size of the arc-shaped guard plate. On the other hand, the arc-shaped guard plate and the circular guide rail are disassembled and replaced according to the size of the arc-shaped guard plate. During the processing, the protective direction of the arc-shaped guard plate is adjusted according to the displacement direction of the gun head, thereby improving the flexibility of laser cutting head protection adjustment.

[0013] 2. Because the arc-shaped guard plate on one side blocks the splashing material on one side, the negative pressure generated by the fan and suction box on the other side forms a directional airflow field in the cutting area, which quickly draws the metal vapor and dust generated during cutting into the box, reducing the PM2.5 concentration during laser welding and extending the contamination cycle of the cutting head lens. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a side view of the protective mechanism in this utility model.

[0016] Figure 3 This is a top-section schematic diagram of the air intake box in this utility model.

[0017] Figure 4 This is a side sectional view of the intake box structure in this utility model.

[0018] Figure 5 This is a bottom view of the protective mechanism in this utility model.

[0019] in:

[0020] 1. Laser housing; 2. Gun head; 3. Air injection pipe; 4. Electric cylinder connector; 5. Protective mechanism; 6. Arc-shaped protective plate; 7. Circular guide rail; 8. Purification mechanism; 9. Suction box; 10. Suction pipe fitting; 11. Adjustable ring; 12. Vertical protrusion; 13. Positioning hole; 14. Purification filter element; 15. Fan; 16. Exhaust screen. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] like Figures 1 to 5 As shown, a splash protection device for a laser cutting machine includes a laser housing 1, a gun head 2, an arc-shaped protective plate 6, and an air intake box 9. The gun head 2 is arranged on the outer side of the laser housing 1. Multiple sets of air injection pipes 3 are arranged at equal intervals on the outer side of the laser housing 1. An electric cylinder connecting seat 4 is connected to the top of the laser housing 1. A protective mechanism 5 is arranged on the outer side of the gun head 2. The protective mechanism 5 disperses the diffuse reflection laser energy during the operation of the gun head 2 through the arc-shaped protective plate 6. One or two sets of arc-shaped protective plates 6 can be installed or adjusted according to the usage requirements. A purification mechanism 8 is arranged on one side of the laser housing 1. The purification mechanism 8 forms a directional airflow field in the cutting area, which quickly draws the metal vapor and dust generated during cutting into the air intake box 9, assisting the protective mechanism 5 in splash protection of the gun head 2 and preventing the diffusion and pollution of the working environment.

[0023] In this embodiment, the protective mechanism 5 includes an arc-shaped guard plate 6, an annular guide rail 7, an adjustable ring body 11, vertical protrusions 12, and positioning holes 13. The inner end of the arc-shaped guard plate 6 is connected to the annular guide rail 7, and the outer side of the annular guide rail 7 is connected to the adjustable ring body 11. The outer side of the adjustable ring body 11 is provided with multiple sets of vertical protrusions 12. The vertical protrusions 12 are connected to the inner end of the annular guide rail 7 by grooves. The outer side of the annular guide rail 7 is provided with multiple positioning holes 13 at equal intervals. The annular guide rail 7 is connected to one side of the arc-shaped guard plate 6 by an arc-shaped slider on its outer side. The position of a single set of arc-shaped guard plates 6 can be flexibly adjusted by rotating the annular guide rail 7.

[0024] In this embodiment, the gun head 2 is connected to the inner end slider of the annular guide rail 7 via a vertical protrusion 12 on the outer side. The vertical protrusion 12 guides the inner end of the annular guide rail 7, making it easy to adjust the height of the annular guide rail 7 and the arc-shaped guard plate 6 connected to the outer side according to the specifications.

[0025] In this embodiment, the annular guide rail 7 is connected to the outer end screw of the vertical protrusion 12 through the positioning hole 13 on the outer side. The width of the annular guide rail 7 is one-quarter of the width of the adjustable ring body 11. The annular guide rail 7 and the vertical protrusion 12 are positioned or disassembled through the positioning holes 13 that are set at equal intervals.

[0026] In this embodiment, the purification mechanism 8 includes an air intake box 9, an intake pipe 10, a purification filter element 14, a fan 15, and an exhaust screen 16. The air intake box 9 is installed on one side of the laser housing 1. The bottom end of the air intake box 9 is connected to the intake pipe 10. The intake pipe 10 is arranged parallel to the arc-shaped protective plate 6. The purification filter element 14 is arranged inside the air intake box 9. The fan 15 is arranged directly above the purification filter element 14. The exhaust screen 16 is arranged on one side of the fan 15. The air intake box 9 is connected through the outer side of the exhaust screen 16. The air intake box 9 arranged on one side is used to suck in the dust generated by cutting, so as to prevent the dust from adhering to the bottom lens surface of the gun head 2.

[0027] In this embodiment, the suction tube 10 is connected to the output end of the fan 15 through the purification filter 14 set at the top. The three-layer gradient glass fiber set inside the purification filter 14 captures 5-20μm particles through Brownian diffusion and interception effects, thereby reducing the dust generated by cutting.

[0028] In practical applications, this laser cutting machine's cutting head anti-splash protection device includes the following functions:

[0029] Step 1: The high-efficiency laser (fiber / CO2) is transmitted to the gun head 2 through the QBH interface set on the outside of the laser housing 1. It is converted into a parallel beam by the collimating lens group. The point focusing lens set on the outside of the gun head 2 focuses the parallel light into a high-density spot with a diameter of 0.1-0.3mm. At the same time, nitrogen gas can be injected into the surface of the workpiece through the nozzle set on the outside of the laser housing 1 using the gas injection pipe 3. When cutting stainless steel, nitrogen gas is used to prevent oxidation and ensure the smoothness of the cut surface. The laser housing 1 raises and lowers the gun head or moves the gun head 2 laterally through the electric cylinder connecting seat 4 set at the top.

[0030] Step 2: Before processing the gun head 2, the operator connects one side of the arc-shaped guard plate 6 to the ring guide rail 7 through the arc-shaped slider according to the splash protection requirements. According to the protection requirements, the operator selects the appropriate size of the arc-shaped guard plate 6 or sets two sets of arc-shaped guard plates 6. The position of the arc-shaped guard plate 6 can be adjusted according to the direction of the splash. Then, the position of one side of the arc-shaped guard plate 6 is positioned through the positioning hole 13 to prevent the arc-shaped guard plate 6 from shaking. When the gun head 2 is running, the arc-shaped guard plate 6 plays a role in isolating the metal vapor and cutting splash generated by laser cutting.

[0031] Step 3: During the processing, according to the specifications and dimensions of the workpiece, the annular guide rail 7 is pulled to make the protrusions on the outer side of the annular guide rail 7 move to the outer side of the adjusting ring body 11. The vertical protrusions 12, which are equally spaced on the outer side of the adjusting ring body 11, are used for vertical guidance. The annular guide rail 7 drives the arc-shaped guard plates 6 on both sides or one side to move up or down. The appropriate protection distance of the arc-shaped guard plates 6 is adjusted according to the usage requirements to avoid collision between the arc-shaped guard plates 6 and the workpiece.

[0032] Step 4: The negative pressure (usually -15kPa to -30kPa) generated inside the suction box 9 by the fan 15 forms a directional airflow field on one side of the gun head 2 through the suction pipe 10 set at the bottom, which quickly draws the metal vapor and dust generated during cutting into the suction box 9. (The multi-chamber structure inside the suction box 9, such as the vortex settling chamber, can reduce the airflow speed.) After the gas is filtered by the purification filter element 14, the purified gas is discharged through the exhaust screen 16 set on one side, while ensuring that the lens set at the bottom of the gun head 2 is kept clean for a longer period of time.

[0033] Therefore, the above-disclosed embodiments are merely illustrative in all respects and are not the only ones. All modifications within the scope of this utility model or its equivalents are included in this utility model.

Claims

1. A splash guard for a cutting head of a laser cutting machine, characterized in that: The laser housing includes a laser shell (1), a gun head (2), an arc-shaped protective plate (6), and an air intake box (9). The gun head (2) is provided on the outside of the laser shell (1). Multiple sets of air injection pipes (3) are provided at equal intervals on the outside of the laser shell (1). An electric cylinder connector (4) is connected to the top of the laser shell (1). A protective mechanism (5) is provided on the outside of the gun head (2). The protective mechanism (5) disperses the diffuse reflection laser energy of the gun head (2) during operation through the arc-shaped protective plate (6) provided on the outside. A purification mechanism (8) is provided on one side of the laser shell (1). The purification mechanism (8) forms a directional airflow field in the cutting area and quickly draws the metal vapor and dust generated during cutting into the air intake box (9). The auxiliary protective mechanism (5) provides splash protection for the gun head (2).

2. The cutting head splash guard for a laser cutting machine of claim 1, wherein: The protective mechanism (5) includes an arc-shaped guard plate (6), an annular guide rail (7), an adjustable ring body (11), vertical protrusions (12), and positioning holes (13). The inner end of the arc-shaped guard plate (6) is connected to the annular guide rail (7), and the outer side of the annular guide rail (7) is connected to the adjustable ring body (11). The outer side of the adjustable ring body (11) is provided with multiple sets of vertical protrusions (12).

3. The splash guard protection device for a cutting head of a laser cutting machine according to claim 2, characterized in that: The vertical protrusion (12) is connected to the inner end of the annular guide rail (7) by a groove. The annular guide rail (7) is provided with multiple positioning holes (13) at equal intervals on the outer side. The annular guide rail (7) is connected to one side of the arc-shaped guard plate (6) by an arc-shaped slider on the outer side.

4. The anti-splatter protection device for a cutting head of a laser cutting machine according to claim 3, characterized in that: The gun head (2) is connected to the inner end slider of the annular guide rail (7) through the vertical protrusion (12) set on the outside.

5. The anti-splatter protection device for a cutting head of a laser cutting machine according to claim 4, characterized in that: The annular guide rail (7) is connected to the outer end screw of the vertical protrusion (12) through the positioning hole (13) on the outer side. The width of the annular guide rail (7) is one-quarter of the width of the adjustable ring body (11).

6. The anti-splatter protection device for a cutting head of a laser cutting machine according to claim 5, characterized in that: The purification mechanism (8) includes an air intake box (9), an intake pipe (10), a purification filter (14), a fan (15), and an exhaust screen (16). The air intake box (9) is installed on one side of the laser housing (1). The bottom end of the air intake box (9) is connected to the intake pipe (10). The intake pipe (10) is arranged parallel to the arc-shaped guard plate (6). The purification filter (14) is installed inside the air intake box (9). The fan (15) is installed directly above the purification filter (14).

7. The anti-splatter protection device for a cutting head of a laser cutting machine according to claim 6, characterized in that: An exhaust screen (16) is provided on one side of the fan (15), and an air intake box (9) is connected through the outside of the exhaust screen (16).

8. The anti-splatter protection device for a cutting head of a laser cutting machine according to claim 7, characterized in that: The inhalation tube (10) is connected to the output end of the fan (15) through the purification filter (14) set at the top.

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