Safety protection device for laser head

Abstract

The utility model discloses a safety protection device for a laser head, which relates to the technical field of welding equipment and comprises a protective cover I, an annular air knife, a protective cover II, a hold-down device, a spring floating mechanism and a sealing cover, the upper end of the first protective cover is fixedly connected with the laser fusion welding head, the annular air knife is fixedly connected between the first protective cover and the second protective cover and is sealed, the lower end of the second protective cover extends to the inner side of the sealing cover, and a dust removal pipeline communicated with the second protective cover is further arranged on the side wall of the second protective cover. The pressing device is fixed to the outer side of the second protective cover, and the sealing cover and the pressing device are in floating connection through a spring floating mechanism to form a movable sealing cavity, so that the sealing cover and the workpiece are sealed in real time. According to the laser protection room, the floatable sealing cover is arranged, the lower end of the second protection cover extends to the inner side of the sealing cover, the first protection cover, the sealing cover and the second protection cover jointly form a completely-sealed working environment, laser leakage is avoided, and the design and manufacturing cost of the laser protection room can be greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of welding equipment, in particular to a laser head safety protection device. Background Art

[0002] Laser welding technology has the characteristics of high efficiency, high quality, high precision and no pollution, and is widely used in high-end manufacturing fields such as aviation, electronics, automobiles, and biomedicine. Laser welding is a welding method that uses the heat energy of a laser beam to heat the workpiece to a molten or vaporized state and forms a weld by solidification. The basic principle of laser welding technology is to use the high energy density of the laser beam to focus the laser beam on the welding laser head, heat the welding joint to the melting or vaporization temperature, melt or vaporize the joint and fuse it with other parts, thereby achieving the purpose of welding.

[0003] However, the high temperature generated by the laser can instantly coagulate or vaporize proteins, thus causing damage to biological tissues. The most vulnerable parts: eyes and skin; eyes are the most sensitive organs of the human body to lasers. Since the focusing effect of the eyeball on light can increase the energy density on the retina by 105 times, low-dose irradiation can cause serious damage to the retina and lead to decreased vision or even blindness. Lasers of different wavelengths cause damage to the eyes. Since the eyes have different transmittances to lasers of different wavelengths, lasers of different wavelengths cause different damage to the eyes. Therefore, laser welding needs to focus on safety protection, and the design, production and manufacturing of the laser room body should be carried out according to project requirements.

[0004] In order to ensure the safety of the laser welding process and avoid damage to human eyes or skin, it is necessary to design and manufacture the laser protection room. Existing laser protection rooms generally adopt a double-layer aluminum alloy structure design. It is recommended to use modular prefabricated 6063-T5 aluminum profile plates with a wall thickness of 80mm and a standard width of 200mm. The profile plate surface uses 2mm aluminum plates, which have concave and convex interlocking shapes to achieve rapid assembly. When making a laser protection room, it is also necessary to pay attention to the dust removal requirements in the laser room and install and implement the dust removal system; therefore, the investment in laser room and dust removal system equipment is huge and the cost is very high.

[0005] In order to reduce the investment cost of the laser room, reduce the equipment configuration of the dust removal system, reduce the overall investment of the laser welding system, and facilitate the implementation and promotion of laser welding, a tooling system is specially designed to reduce the production cycle of the laser room and reduce costs. Summary of the invention

[0006] In order to overcome the defects of the prior art, the purpose of the utility model is to provide a laser head safety protection device to solve the problem of reducing the investment cost of the laser room body, while reducing the equipment configuration of the dust removal system and reducing the overall investment of the laser welding system.

[0007] To this end, the utility model proposes a laser head safety protection device, including a protective cover one, an annular air knife, a protective cover two, a holding device, a spring floating mechanism and a sealing cover; the upper end of the protective cover one is fixedly connected to the laser welding head, the annular air knife is fixedly connected between the protective cover one and the protective cover two and is sealed, and the lower end of the protective cover two extends to the inner side of the sealing cover, and the side wall of the protective cover two is also provided with a dust removal duct connected thereto; the holding device is fixed to the outer side of the protective cover two, and the sealing cover and the holding device are floatingly connected through the spring floating mechanism, so that the protective cover one, the protective cover two and the sealing cover form a movable sealing cavity, and at the same time, the sealing cover and the workpiece are kept in real-time sealing.

[0008] As a preferred technical solution of the present invention, an upper end of the protective cover is provided with a protective cover joint, and the protective cover joint is fixedly connected to the laser welding head.

[0009] As a preferred technical solution of the present invention, the protective cover joint has an internal thread, and the laser welding head has an external thread.

[0010] As a preferred technical solution of the present invention, the spring floating mechanism is provided with several groups, and each group of the spring floating mechanism includes a compression spring, a guide column and a limit nut.

[0011] As a preferred technical solution of the present invention, the lower end of the guide column is fixedly connected to the sealing cover, the upper end of the guide column passes through the through hole on the pressing device and is threadedly connected to the limit nut, and the compression spring is sleeved in the guide column and located between the spring floating mechanism and the pressing device.

[0012] As a preferred technical solution of the present invention, the spring floating mechanisms are specifically provided in five groups, and the five groups of the spring floating mechanisms are distributed in a ring array.

[0013] As a preferred technical solution of the present invention, a robot connecting plate is fixedly connected to the outer side of the pressing device, and the robot connecting plate is connected to the robot gripper.

[0014] As a preferred technical solution of the present invention, the air outlet direction inside the annular air knife is toward the center position of the lower end.

[0015] As a preferred technical solution of the present invention, the outer end of the annular air knife is connected to a high-pressure air source.

[0016] As a preferred technical solution of the present invention, the dust removal pipeline is connected to the dust removal equipment.

[0017] The laser head safety protection device provided by the utility model provides a floating sealing cover, and extends the lower end of the second protective cover to the inner side of the sealing cover, so that the first protective cover, the sealing cover, and the second protective cover together form a completely sealed working environment to avoid laser leakage and personal injury; it can greatly reduce the design and production costs of the laser protection room and reduce the investment cost of laser welding; by providing a dust removal duct, it can effectively reduce the selection of dust removal equipment, and because the actual working environment of the laser is reduced, it can effectively reduce the selection of dust removal equipment and reduce the investment in dust removal equipment; by providing an annular wind knife, it can protect against spatter during welding and avoid welding spatter from splashing onto the protective lens.

[0018] In addition, the laser head safety protection device provided by the utility model reduces the design, processing and production cycle of the laser room body, reduces the equipment selection of dust removal equipment, reduces the overall investment cost of laser welding, and increases the popularity of laser welding systems.

[0019] In addition to the above-described purposes, features and advantages, the present application also has other purposes, features and advantages. The present application will be further described in detail with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0021] Figure 1 This is a front view of the laser head safety protection device of the utility model;

[0022] Figure 2 It is a partial enlarged view of the laser head safety protection device of the utility model;

[0023] Description of Reference Numerals

[0024] 1. Laser welding head; 2. Protective cover 1; 3. Dust removal duct; 4. Annular air knife; 5. Holding device; 6. Spring floating mechanism; 7. Sealing cover; 8. Protective cover 2; 9. Robot connecting plate; 21. Protective cover joint; 61. Compression spring; 62. Guide column; 63. Limit nut. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] like Figure 1-2As shown, the laser head safety protection device of the utility model includes, from top to bottom, a protection cover 1 2, an annular air knife 4, a protection cover 2 8, a holding device 5, a spring floating mechanism 6 and a sealing cover 7.

[0027] Specifically, the upper end of the protective cover 2 has a protective cover joint 21, the laser welding head 1 is located above the protective cover 2, and the protective cover joint 21 is fixedly connected to the laser welding head 1 to provide stable laser output for the welding process; wherein, the protective cover joint 21 has an internal thread, and the laser welding head 1 has an external thread, and the protective cover joint 21 and the laser welding head 1 are threadedly connected.

[0028] The lower end of the protective cover 2 is fixedly connected to the annular wind knife 4 and sealed, and the upper end of the protective cover 2 8 is fixedly connected to the annular wind knife 4 and sealed, so that the protective cover 2 and the protective cover 2 8 are sealed and connected as a whole; at the same time, the lower end of the protective cover 2 8 extends to the inner side of the sealing cover 7, and the lower end of the sealing cover 7 is attached to the welded plate. The protective cover 2, the sealing cover 7, and the protective cover 2 together form a completely sealed working environment to prevent laser leakage and cause personal injury.

[0029] Among them, the outer end of the annular air knife 4 is connected to a high-pressure air source, and the air outlet direction inside the annular air knife 4 is toward the lower center position. The annular air knife 4 is mainly used to protect against spatter during welding to prevent welding spatter from splashing onto the protective lens.

[0030] like Figure 1 As shown, a dust removal duct 3 is provided on the side wall of the protective cover 8 and is connected thereto. The dust removal duct 3 is connected to a dust removal device to extract and purify the welding fumes generated during the welding process.

[0031] The holding device 5 is fixed on the outside of the protective cover 8, and a robot connecting plate 9 is fixedly connected to the outside of the holding device 5, so that the holding device 5 is connected to the robot clamp through the robot connecting plate 9, and at the same time, the holding device 5 and the sealing cover 7 are floatingly connected through a spring floating mechanism 6. The spring floating mechanism 6, the holding device 5 and the sealing cover 7 together form a movable sealing environment. The robot clamp is pressed down through the holding device 5, and the spring floating mechanism 6 acts on the sealing cover 7 to ensure that the sealing cover 7 keeps in contact with the workpiece in real time to form a sealed environment, which can effectively perform laser protection.

[0032] Among them, Figure 2As shown, the spring floating mechanism 6 is provided with several groups, each group of the spring floating mechanism 6 includes a compression spring 61, a guide column 62 and a limit nut 63, the lower end of the guide column 62 is fixedly connected to the sealing cover 7, the upper end of the guide column 62 passes through the through hole on the pressing device 5 and is threadedly connected to the limit nut 63, and the compression spring 61 is sleeved in the guide column 62 and is located between the spring floating mechanism 6 and the pressing device 5. Among them, in this embodiment, the spring floating mechanism 6 is specifically provided with five groups, and the five groups of the spring floating mechanisms 6 are distributed in a ring array.

[0033] The working principle and working process of the laser head safety protection device of the present utility model are briefly described below with reference to the accompanying drawings.

[0034] First, the robot drives the holding device 5 and the entire protective device to move downward through the robot connecting plate 9, and the lower end of the sealing cover 7 first contacts the welded plate to form a closed space; then the robot clamp drives the holding device 5 to continue to move downward, so that the lower end of the protective cover 2 8 further extends into the sealing cover 7. At this time, the protective cover 1, the sealing cover, and the protective cover 2 together form a completely sealed working environment to prevent laser leakage; in addition, the dust removal equipment and the wind knife on the outside of the dust removal duct start to work. Finally, the laser welding head 1 officially welds the welded plate, the dust removal duct plays a dust removal function, and the annular wind knife protects against spatter during welding to prevent welding spatter from splashing onto the protective lens.

[0035] The principle of the present invention is to add a protective cover body at the front end of the laser head. No matter what type of laser head is, as long as the protective cover body is added at the front end, it is within the protection scope of the present invention.

[0036] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A laser head safety protection device, characterized in that: It comprises a protective cover 1 (2), an annular wind knife (4), a protective cover 2 (8), a holding device (5), a spring floating mechanism (6) and a sealing cover (7); The upper end of the protective cover 1 (2) is fixedly connected to the laser welding head (1), the annular air knife (4) is fixedly connected between the protective cover 1 (2) and the protective cover 2 (8) and sealed, and the lower end of the protective cover 2 (8) extends to the inner side of the sealing cover (7), and the side wall of the protective cover 2 (8) is also provided with a dust removal duct (3) connected thereto; The holding device (5) is fixed on the outside of the second protective cover (8), and the sealing cover (7) and the holding device (5) are floatingly connected via the spring floating mechanism (6), so that the first protective cover (2), the second protective cover (8) and the sealing cover (7) form a movable sealing cavity, and at the same time, the sealing cover (7) and the workpiece are kept in real-time sealing.

2. The laser head safety protection device according to claim 1, characterized in that: The upper end of the protective cover 1 (2) is provided with a protective cover joint (21), and the protective cover joint (21) is fixedly connected to the laser welding head (1).

3. The laser head safety protection device according to claim 2, characterized in that: The protective cover joint (21) has an internal thread, and the laser welding head (1) has an external thread.

4. The laser head safety protection device according to claim 1, characterized in that: The spring floating mechanism (6) is provided with a plurality of groups, and each group of the spring floating mechanism (6) comprises a compression spring (61), a guide column (62) and a limiting nut (63).

5. The laser head safety protection device according to claim 4, characterized in that: The lower end of the guide column (62) is fixedly connected to the sealing cover (7), the upper end of the guide column (62) passes through the through hole on the holding device (5) and is threadedly connected to the limit nut (63), and the compression spring (61) is sleeved in the guide column (62) and is located between the spring floating mechanism (6) and the holding device (5).

6. The laser head safety protection device according to claim 4, characterized in that: The spring floating mechanisms (6) are specifically arranged in five groups, and the five groups of the spring floating mechanisms (6) are distributed in a ring array.

7. The laser head safety protection device according to claim 1, characterized in that: A robot connecting plate (9) is fixedly connected to the outer side of the pressing device (5), and the robot connecting plate (9) is connected to the robot clamping claw.

8. The laser head safety protection device according to claim 1, characterized in that: The air outlet direction of the annular wind knife (4) is toward the center position of the lower end.

9. The laser head safety protection device according to claim 1, characterized in that: The outer end of the annular air knife (4) is connected to a high-pressure air source.

10. The laser head safety protection device according to claim 1, characterized in that: The dust removal pipeline (3) is connected to the dust removal equipment.

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