Light path protection tube for laser welding torch

Abstract

The utility model discloses a laser welding torch light path protection tube which comprises a laser heat source light path component, a protection tube is connected to the transmitting end of the laser heat source light path component, air holes are formed in the tube wall of the protection tube in a penetrating mode, and a tube head is connected to the other end of the protection tube. Welding laser emitted by the laser heat source light path component sequentially penetrates through the protection tube and the tube head. The air holes are formed in the side wall of the protection pipe, so that the space in the protection pipe can be communicated with the external space, smoke in the protection pipe can be discharged outwards through the air holes, and the situation that the smoke concentration in the protection pipe is too high is avoided; the flowing speed of smoke can be slowed down, the speed of moving towards the laser heat source light path component is slowed down, meanwhile, due to the fact that the space of the first channel hole is enlarged, the concentration of the smoke can be reduced, the influence of the smoke on laser power is reduced, the smoke can be discharged through the air holes, and meanwhile the heat dissipation effect can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of laser welding equipment, in particular to a laser welding torch light path protection tube. Background Art

[0002] Laser-arc hybrid welding is a welding method that uses the cooperation of laser beam and arc as heat source, which can improve the welding efficiency of arc and reduce the requirements of laser on assembly accuracy.

[0003] A protective tube is generally installed at the end of the laser heat source optical path component. In an actual welding environment, smoke will be generated during welding. Since the end of the protective tube is close to the welding position, the smoke will inevitably enter the protective tube. When the smoke concentration in the protective tube is too high, it will affect the actual output power of the laser and the welding quality. In addition, the smoke may enter and contaminate the laser emission end. Utility Model Content

[0004] Therefore, the technical problem to be solved by the present invention is to provide a laser welding torch optical path protection tube capable of preventing the smoke concentration in the protection tube from being too high.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a laser welding torch optical path protection tube, comprising a laser heat source optical path component, the emitting end of the laser heat source optical path component is connected to a protective tube, an air vent is opened through the tube wall of the protective tube, and the other end of the protective tube is connected to a tube head, and the laser beam emitted from the laser heat source optical path component passes through the protective tube and the tube head in sequence.

[0006] The above-mentioned laser welding torch optical path protection tube has an inner diameter at one end of the protection tube connected to the laser heat source optical path component that is larger than an inner diameter at one end of the protection tube connected to the tube head.

[0007] The above-mentioned laser welding torch optical path protection tube has a first channel hole in one end of the protection tube close to the laser heat source optical path component, and a second channel hole in one end of the protection tube close to the tube head. The first channel hole and the second channel hole are connected to each other, and the inner diameter of the first channel hole is larger than the inner diameter of the second channel hole.

[0008] In the above-mentioned laser welding torch optical path protection tube, the length of the first channel hole is greater than the axial length of the second channel hole.

[0009] The above-mentioned laser welding torch light path protection tube has two or more air holes opened on the tube wall in a direction parallel to the axis of the protection tube, one of the air holes is arranged at the position of the first channel hole, and the other air hole is arranged at the position where the first channel hole and the second channel hole are connected.

[0010] In the aforementioned laser welding torch optical path protection tube, in a longitudinal section along the axis of the protection tube: the air vents are perpendicular to the axis.

[0011] The above-mentioned laser welding torch optical path protection tube has two or more air holes formed at equal intervals in the cross section perpendicular to the axis of the protection tube.

[0012] The above-mentioned laser welding torch optical path protection tube has an external connecting thread on the outer wall of one end of the protection tube, and an internal connecting thread on the inner wall of the other end of the protection tube; one end of the protection tube is connected to the laser heat source optical path component through the external connecting thread, and the other end of the protection tube is connected to the tube head through the internal connecting thread.

[0013] The above-mentioned laser welding torch optical path protection tube has a cut surface on its outer wall surface along a direction parallel to the axis.

[0014] The above-mentioned laser welding torch optical path protection tube has at least two cut surfaces formed on the outer wall surface of the protection tube in a circumferential direction of the protection tube.

[0015] The technical solution of the utility model has achieved the following beneficial technical effects:

[0016] 1. By opening ventilation holes on the side wall of the protection tube, the space inside the protection tube can be connected with the outside space, and the location of the ventilation holes is at a certain distance from the welding position. During the actual welding process, the smoke in the protection tube can be discharged outward through the ventilation holes, avoiding excessive smoke concentration in the protection tube and ensuring normal welding.

[0017] 2. By setting the first channel hole and the second channel hole, the first channel hole with a larger inner diameter can slow down the flow speed of the smoke after it enters the first channel hole, and slow down the speed of moving toward the laser heat source optical path component. At the same time, due to the increase in the space of the first channel hole, the concentration of the smoke can be reduced, the impact of the smoke on the laser power can be reduced, and the smoke can be discharged through the air vents, while the heat dissipation effect can be increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the connection structure between the protection tube, the laser heat source optical path component and the tube head of the utility model;

[0019] Figure 2 A schematic diagram of the three-dimensional structure of the protective tube of the utility model;

[0020] Figure 3 A schematic diagram of the cross-sectional structure of the protective tube of the present invention.

[0021] The reference numerals in the figure are as follows: 1-laser heat source optical path component; 2-protective tube; 3-tube head; 4-external connecting thread; 5-internal connecting thread; 6-section; 7-air vent; 8-axis; 9-first channel hole; 10-second channel hole. DETAILED DESCRIPTION

[0022] The laser welding torch light path protection tube in this embodiment is as follows Figure 1-2 As shown, it includes a laser heat source optical path component 1, a protective tube 2 is connected to the emitting end of the laser heat source optical path component 1, and a pipe head 3 is connected to the other end of the protective tube 2. An external connecting thread 4 is provided on the outer wall of one end of the protective tube 2, and an internal connecting thread 5 is provided on the inner wall of the other end of the protective tube 2. One end of the protective tube 2 is connected to the laser heat source optical path component 1 through the external connecting thread 4, and the other end of the protective tube 2 is connected to the pipe head 3 through the internal connecting thread 5. An air vent 7 is opened through the tube wall of the protective tube 2. The welding laser emitted by the laser heat source optical path component 1 passes through the protective tube 2 and the pipe head 3 in turn. By opening the air vent 7 on the side wall of the protective tube 2, the space inside the protective tube 2 can be connected to the external space, and the position of the air vent 7 is at a certain distance from the welding position. During the actual welding process, the smoke in the protective tube 2 can be discharged outward through the air vent 7 to avoid excessive smoke concentration in the protective tube 2 and ensure normal welding.

[0023] like Figure 2-3 As shown, the inner diameter of the end of the protective tube 2 connected to the laser heat source optical path component 1 is larger than the inner diameter of the end of the protective tube 2 connected to the tube head 3. The end of the protective tube 2 near the laser heat source optical path component 1 is a first channel hole 9, and the end of the protective tube 2 near the tube head 3 is a second channel hole 10. The first channel hole 9 and the second channel hole 10 are interconnected. The inner diameter of the first channel hole 9 is larger than the inner diameter of the second channel hole 10, and the length of the first channel hole 9 is longer than the axial length of the second channel hole 10. The space inside the first channel hole 9 is larger than the space inside the second channel hole 10, which can slow down the movement of smoke after it enters the first channel hole 9.

[0024] like Figure 3 As shown, in a direction parallel to the axis 8 of the protective tube 2, more than two air holes 7 are provided on the tube wall of the protective tube 2. One air hole 7 is provided at the position of the first channel hole 9, and the other air hole 7 is provided at the position where the first channel hole 9 and the second channel hole 10 are connected. The concentration of smoke in the second channel hole 10 is higher than that in the first channel hole 9, and the movement speed is faster. By providing a group of air holes 7 at the position where the two channel holes are connected, a portion of the smoke with higher concentration and faster flow rate can be released first, thereby further reducing the smoke entering the first channel hole 9.

[0025] In the longitudinal section along the axis 8 of the protection tube 2 , the air holes 7 are perpendicular to the axis 8 . In the cross section perpendicular to the axis 8 of the protection tube 2 , the protection tube 2 has two or more air holes 7 at equal intervals in the circumferential direction.

[0026] like Figure 2 As shown, a cut surface 6 is formed on the outer wall surface of the protection tube 2 in a direction parallel to the axis 8 . In the circumferential direction of the protection tube 2 , at least two cut surfaces 6 are formed on the outer wall surface of the protection tube 2 in opposite directions.

[0027] Working principle: The smoke generated during welding will inevitably enter through the pipe head 3 and diffuse into the protective tube 2. After entering the protective tube 2, it will be discharged through the air vent 7 to avoid excessive smoke concentration in the protective tube 2 and improve the heat dissipation efficiency of the protective tube 2.

[0028] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the claims of this patent application.

Claims

1. A laser welding torch optical path protection tube, comprising a laser heat source optical path component (1), characterized in that: A protective tube (2) is connected to the emission end of the laser heat source optical path component (1); an air vent (7) is provided through the wall of the protective tube (2); a pipe head (3) is connected to the other end of the protective tube (2); and a laser beam emitted from the laser heat source optical path component (1) passes through the protective tube (2) and the pipe head (3) in sequence.

2. The laser welding torch optical path protection tube according to claim 1, characterized in that: The inner diameter of one end of the protection tube (2) connected to the laser heat source optical path component (1) is larger than the inner diameter of one end of the protection tube (2) connected to the tube head (3).

3. The laser welding torch optical path protection tube according to claim 2, characterized in that: A first channel hole (9) is formed in one end of the protective tube (2) close to the laser heat source optical path component (1), and a second channel hole (10) is formed in one end of the protective tube (2) close to the tube head (3). The first channel hole (9) and the second channel hole (10) are connected to each other, and the inner diameter of the first channel hole (9) is larger than the inner diameter of the second channel hole (10).

4. The laser welding torch optical path protection tube according to claim 3, characterized in that: The length of the first channel hole (9) is greater than the length of the second channel hole (10).

5. The laser welding torch optical path protection tube according to claim 3, characterized in that: In a direction parallel to the axis (8) of the protection tube (2), two or more air holes (7) are provided on the wall of the protection tube (2), one of the air holes (7) is arranged at the position of the first channel hole (9), and the other of the air holes (7) is arranged at a position where the first channel hole (9) and the second channel hole (10) meet.

6. A laser welding torch optical path protection tube according to any one of claims 1 to 5, characterized in that: In a longitudinal section along the axis (8) of the protection tube (2), the air vent (7) is perpendicular to the axis (8).

7. A laser welding torch optical path protection tube according to any one of claims 1 to 5, characterized in that: On a cross section perpendicular to the axis (8) of the protection tube (2), the protection tube (2) is provided with two or more air holes (7) at equal intervals in the circumferential direction.

8. A laser welding torch optical path protection tube according to any one of claims 1 to 5, characterized in that: An external connection thread (4) is provided on the outer wall of one end of the protection tube (2), and an internal connection thread (5) is provided on the inner wall of the other end of the protection tube (2); one end of the protection tube (2) is connected to the laser heat source optical path component (1) via the external connection thread (4), and the other end of the protection tube (2) is connected to the tube head (3) via the internal connection thread (5).

9. A laser welding torch optical path protection tube according to any one of claims 1 to 5, characterized in that: A cut surface (6) is provided on the outer wall surface of the protection tube (2) in a direction parallel to the axis (8).

10. The laser welding torch optical path protection tube according to claim 9, characterized in that: In the circumferential direction of the protection tube (2), at least two cut surfaces (6) are formed on the outer wall surface of the protection tube (2) in a relative manner.

Images