Laser welding machine

Abstract

The utility model belongs to the technical field of glasses frame welding equipment, and particularly relates to a laser welding machine. Comprising a workbench; the rotating disc is mounted on the workbench; the multiple positioning mechanisms are arranged on the circumference of the top of the rotating disc in a circumferential array mode, and positioning grooves are formed in the tops of the positioning mechanisms; the visual detection mechanism comprises a machine vision camera and is used for detecting welding spots on the workpiece; the welding mechanism is mounted on the workbench; the driving mechanism is mounted at the bottom of the rotating disc and used for driving the rotating disc to rotate; the welding mechanism comprises a Y-direction adjusting support arranged on the workbench, an X-direction adjusting support arranged on the Y-direction adjusting support and a laser welding head installed on the X-direction adjusting support. After the types of glasses frames on the positioning mechanisms are replaced, the multiple positioning mechanisms are rotated through the rotating disc, the visual detection mechanism detects the position of a welding spot, the welding mechanism adjusts the position of a laser welding head and conducts welding, the operation difficulty of workers is lowered, and the welding quality and efficiency are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of glasses frame welding equipment, in particular to a laser welding machine. Background Art

[0002] Glasses are essential items for people with myopia and hyperopia, and they can also be used as decorations. Metal frames need to be welded during production. During the welding process, a welding process is required to weld the locking block to one side of the eyeglass ring, and another welding process is required to weld the center beam to the two eyeglass rings. Due to technological progress, various types of welding equipment have emerged.

[0003] In the prior art, welding equipment is usually equipped with a positioning mechanism on a workbench. After the worker places the eyeglass frame component to be welded on the positioning mechanism, the welding head starts welding the weld point. However, the position of the welding head is usually fixed. When it is necessary to replace another type of eyeglass frame, the welding point position is different due to the different types of eyeglass frames. The welding equipment cannot automatically identify the welding point, and the worker needs to adjust the parameters of the welding equipment and the position of the welding head, which is difficult to operate. Utility Model Content

[0004] The purpose of the utility model is to provide a laser welding machine to solve the above-mentioned technical problems. After the type of eyeglass frames on the positioning mechanism is replaced, multiple positioning mechanisms are rotated by rotating a disc, a visual detection mechanism automatically detects the position of the welding point, and the welding mechanism adjusts the position of the laser welding head and welds accurately. There is no need to manually adjust the position of the laser welding head, which reduces the difficulty of operation for workers and improves the welding quality and efficiency.

[0005] In view of this, the utility model provides a laser welding machine, including a workbench and also including:

[0006] A rotating disc is mounted on the workbench;

[0007] A plurality of positioning mechanisms are arranged in a circular array on the circumference of the top of the rotating disc, and a positioning groove adapted to the shape of the workpiece is provided on the top of each of the plurality of positioning mechanisms;

[0008] A visual inspection mechanism is installed on the workbench, and the visual inspection mechanism includes a machine vision camera for inspecting welding points on the workpiece to be welded on the positioning mechanism;

[0009] A welding mechanism, installed on a workbench, is used to weld the welding points of the workpiece after being inspected by the visual inspection mechanism;

[0010] A driving mechanism is installed at the bottom of the rotating disc and is used to drive the rotating disc to rotate;

[0011] The welding mechanism includes a Y-axis adjustable bracket arranged on a workbench and movable in the Y direction, an X-axis adjustable bracket arranged on the Y-axis adjustable bracket and movable in the X direction, a laser welding head installed on the X-axis adjustable bracket, and a driving assembly for driving the Y-axis adjustable bracket and the X-axis adjustable bracket to move. The laser welding head is directly above the positioning mechanism, and the driving assembly is located at the bottom of the workbench.

[0012] In the above solution, further, the driving component includes:

[0013] Two screw rod assemblies are installed on the workbench and in the Y-axis adjustment bracket respectively;

[0014] Two first drive motors are respectively installed on the workbench and one end of the Y-axis adjustment bracket, and the driving end of the first drive motor is connected to one end of the screw assembly to drive the screw assembly to rotate;

[0015] Wherein, the Y-axis adjustment bracket is installed on the screw assembly on the workbench, and the X-axis adjustment bracket is installed on the screw assembly in the Y-axis adjustment bracket.

[0016] In the above solution, further, the positioning mechanism includes:

[0017] A base, mounted on the circumference of the top of the rotating disc;

[0018] The mold is mounted on the top of the base;

[0019] The positioning groove is provided at the top of the mold, and a piece taking opening connected to the positioning groove is symmetrically arranged on one side of the mold.

[0020] In the above solution, further, avoidance holes are provided on the mold at the welding points of the workpiece.

[0021] In the above solution, further, the positioning mechanism also includes:

[0022] The pressing part is located above the mold, and includes five pressing plates arranged in sequence, and one end of the five pressing plates are connected by a connecting part;

[0023] The driving member is installed on the rotating disc, and the driving end of the driving member is connected to the connecting part, and is used to drive the pressing part to press the workpiece arranged in the positioning groove.

[0024] In the above solution, further, the driving mechanism includes:

[0025] The second driving motor is installed at the bottom of the workbench. The driving end of the second driving motor is connected to the rotating disc to drive the rotating disc to rotate.

[0026] In the above solution, further, an argon gas protection nozzle is installed on the laser welding head.

[0027] In the above scheme, further, a plurality of material placing troughs are installed on one side of the workbench.

[0028] The beneficial effects of the utility model are:

[0029] 1. After changing the type of eyeglass frame on the positioning mechanism, the multiple positioning mechanisms are rotated by rotating the disc, the visual inspection mechanism automatically detects the position of the welding point, and the welding mechanism adjusts the position of the laser welding head and welds accurately. There is no need to manually adjust the position of the laser welding head, which reduces the difficulty of workers' operation and improves the welding quality and efficiency;

[0030] 2. The pressing part is used to stabilize the position of each component of the eyeglass frame to prevent the components from falling out of the positioning groove or tilting, which affects production efficiency;

[0031] 3. During the laser welding process, the argon protection nozzle sprays argon gas to the welding point to prevent the eyeglass frame from being oxidized or nitrided by the air. It can also avoid burning and other welding defects caused by it to ensure high quality of welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0033] Figure 2 It is a schematic diagram of the structure of the utility model from another perspective;

[0034] Figure 3 It is a structural schematic diagram of the positioning mechanism of the utility model;

[0035] Figure 4 It is a structural schematic diagram of the mold of the utility model;

[0036] Figure 5 It is a structural schematic diagram of the welding mechanism of the utility model.

[0037] The symbols in the figure are:

[0038] 1. Rotating disc; 2. Positioning mechanism; 21. Base; 22. Mold; 23. Pressing part; 231. Pressing plate; 232. Connecting part; 24. Driving part; 3. Visual inspection mechanism; 31. Machine vision camera; 4. Welding mechanism; 41. Y-axis adjustment bracket; 42. X-axis adjustment bracket; 43. Laser welding head; 44. Driving assembly; 441. Screw assembly; 442. First driving motor; 5. Driving mechanism; 51. Second driving motor; 6. Positioning groove; 7. Pick-up opening; 8. Avoidance hole; 9. Argon protection nozzle. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0040] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0041] Embodiment 1:

[0042] This embodiment provides a laser welding machine, including a workbench, and further comprising:

[0043] A rotating disc is mounted on the workbench;

[0044] A plurality of positioning mechanisms 2 are arranged in a circular array on the circumference of the top of the rotating disc, and a positioning groove 6 matching the shape of the workpiece is provided on the top of each of the plurality of positioning mechanisms 2;

[0045] A visual inspection mechanism 3 is installed on the workbench. The visual inspection mechanism 3 includes a machine vision camera 31 for inspecting welding points on the workpiece to be welded on the positioning mechanism 2;

[0046] The welding mechanism 4 is installed on the workbench and is used to weld the welding points of the workpiece after being inspected by the visual inspection mechanism 3;

[0047] The driving mechanism 5 is installed at the bottom of the rotating disc and is used to drive the rotating disc to rotate;

[0048] Among them, the welding mechanism 4 includes a Y-axis adjustment bracket 41 which is arranged on the workbench and can be moved and adjusted in the Y direction, an X-axis adjustment bracket 42 which is arranged on the Y-axis adjustment bracket 41 and can be moved and adjusted in the X direction, a laser welding head 43 installed on the X-axis adjustment bracket 42, and a driving component 44 for driving the Y-axis adjustment bracket 41 and the X-axis adjustment bracket 42 to move. The laser welding head 43 is directly above the positioning mechanism 2, and the driving component 44 is located at the bottom of the workbench.

[0049] In this technical solution, if Figure 1 As shown, the workbench may include a loading area, a solder joint inspection area, a welding area and a unloading area, and the loading area, the solder joint inspection area, the welding area and the unloading area are arranged on the front, left, rear and right sides of the workbench in sequence.

[0050] The rotating disc may be circular, and there may be four positioning mechanisms 2 , and one positioning mechanism 2 is installed on the rotating disc every 90° arc, and the rotating disc is driven to rotate by the driving mechanism 5 .

[0051] The staff can be located in the loading area, and place the multiple eyeglass frame parts to be welded in the positioning groove 6 of the positioning mechanism 2. The positioning groove 6 is used to position the various parts of the eyeglass frame. The positioning groove 6 can include two eyeglass ring grooves, two locking block grooves located on both sides of the two eyeglass ring grooves, and a middle beam groove located between the two eyeglass ring grooves, which are used to place two eyeglass rings, two locking blocks, and a middle beam in sequence. The positioning mechanism 2 can be connected to the rotating disk by using screws. Since the positions of the welding points of different types of eyeglass frames are different, it is convenient to replace the positioning mechanism 2 when changing the type of eyeglass frame to be welded.

[0052] The visual inspection mechanism 3 can be located in the welding spot inspection area, and the machine vision camera 31 can be installed by using a bracket. The machine vision camera 31 can be a conventional CCD camera or a CMOS camera. Since the positions of welding spots of different types of eyeglass frames are different, the images of different types of glasses are recorded in advance into the machine vision camera 31, the rotating disk rotates 90° and stops rotating, and the positioning mechanism 2 located in front of the loading area rotates to the bottom of the machine vision camera 31. The machine vision camera 31 detects and analyzes the positions of welding spots of the eyeglass frames and transmits the signals to the welding mechanism 4. If the machine vision camera 31 detects that the welding spots between the eyeglass frame components are not placed accurately, or the welding parts are missing, resulting in the lack of welding spots, the rotating disk stops rotating and the welding mechanism 4 stops welding to avoid the production of defective products, thereby ensuring the welding quality of the eyeglass frames.

[0053] The welding mechanism 4 can be located in the welding area, and the rotating disk rotates 90° and stops rotating. After the welding mechanism 4 receives the signal from the machine vision camera 31, the positioning mechanism 2 in front of the welding spot detection area rotates to the bottom of the welding head of the welding mechanism 4. The Y-axis adjustment bracket 41 and the X-axis adjustment bracket 42 of the welding mechanism 4 are adjusted according to the signal of the welding spot position transmitted by the machine vision camera 31. The Y-axis adjustment bracket 41 moves forward and backward, and then the X-axis adjustment bracket 42 is adjusted left and right, so as to adjust the position of the laser welding head 43. The laser welding head 43 welds the welding spot. The laser welding head 43 can be a conventional laser welding head 43. Laser welding has the advantages of fast welding speed and high precision. After welding is completed, the rotating disk continues to rotate to the discharge area.

[0054] The rotating disc rotates 90° to the discharging area and then stops rotating, and the welded eyeglass frame can be taken out from the positioning groove 6 by a robot or manually. Then it continues to rotate 90° to the feeding area, and continues to manually place the eyeglass frame parts into the positioning groove 6.

[0055] When the type of eyeglass frame needs to be changed, the rotating disc can be stopped, the type of positioning mechanism 2 can be changed, and then the rotating disc can be started. The welding points can be automatically detected by the visual detection mechanism 3, and the position of the laser welding head 43 can be adjusted by the welding mechanism 4. There is no need for the loading worker to adjust the welding equipment welding point position parameters, and there is no need to adjust the position of the laser welding head 43, which reduces the operating difficulty of the workers, avoids the workers' operating errors, achieves accurate welding of the eyeglass frame welding points, and improves the welding quality and welding efficiency.

[0056] Among them, the utility model also includes a control system, which can be an existing conventional system for controlling the rotating disk, the visual inspection mechanism 3, the welding mechanism 4 and the driving mechanism 5 to achieve coordinated and precise operation, wherein the control system can be a PLC control system.

[0057] Embodiment 2:

[0058] This embodiment provides a laser welding machine, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0059] The drive assembly 44 includes:

[0060] Two screw rod assemblies 441 are respectively installed on the workbench and in the Y-axis adjustment bracket 41;

[0061] Two first drive motors 442 are respectively installed on the workbench and one end of the Y-axis adjustment bracket 41. The driving end of the first drive motor 442 is connected to one end of the screw assembly 441 to drive the screw assembly 441 to rotate;

[0062] The Y-axis adjustment bracket 41 is installed on a screw assembly 441 on a workbench, and the X-axis adjustment bracket 42 is installed on the screw assembly 441 inside the Y-axis adjustment bracket 41 .

[0063] In the present technical solution, the position of the laser welding head 43 is adjusted by moving and adjusting the Y-axis adjustment bracket 41 and the X-axis adjustment bracket 42 , and the Y-axis adjustment bracket 41 and the X-axis adjustment bracket 42 are driven by a driving assembly 44 .

[0064] The motor and the screw assembly 441 are both conventional motors and screw assembly 441. The motor rotates to drive the screw assembly 441 to rotate, thereby moving the Y-axis adjustment bracket 41 or the X-axis adjustment bracket 42. The movement process is stable and accurate.

[0065] Embodiment 3:

[0066] This embodiment provides a laser welding machine, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0067] The positioning mechanism 2 comprises:

[0068] A base 21 is mounted on the circumference of the top of the rotating disc;

[0069] The mold 22 is installed on the top of the base 21;

[0070] The positioning groove 6 is provided at the top of the mold 22 , and a take-out opening 7 connected to the positioning groove 6 is symmetrically provided on one side of the mold 22 .

[0071] In this technical solution, the base 21 is installed on the rotating disc by setting screws, and the mold 22 is installed on the base 21 by setting screws, which is convenient for installation and removal. The removal opening 7 is located on the side close to the worker, which is convenient for the worker or the robot to take out the welded eyeglass frame.

[0072] Furthermore, avoidance holes 8 are provided on the mold 22 at the welding points of the workpiece.

[0073] In the present technical solution, a gap may be formed between the base 21 and the mold 22, and the avoidance hole 8 is used to avoid sparks generated by the welding point during laser welding and facilitate the dissipation of local heat generated by laser welding.

[0074] Embodiment 4:

[0075] This embodiment provides a laser welding machine, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0076] The positioning mechanism 2 also includes:

[0077] The pressing part 23 is located above the mold 22. The pressing part 23 includes five pressing plates 231 arranged in sequence. One end of the five pressing plates 231 is connected by a connecting part 232.

[0078] The driving member 24 is mounted on the rotating disc, and the driving end of the driving member 24 is connected to the connecting portion 232 , so as to drive the pressing portion 23 to press the workpiece disposed in the positioning groove 6 .

[0079] In this technical solution, if Figure 3 As shown, five pressure plates 231 are pressed on the left locking block, the left eyeglass ring, the middle beam, the right eyeglass ring and the right locking block from left to right in sequence, so as to stabilize the positions of the various components of the eyeglass frame and prevent the various components from falling out of the positioning groove 6 or tilting, thereby affecting the production efficiency.

[0080] Among them, the driving member 24 can be a cylinder, the bottom of the driving member 24 can be installed on a rotating disc, the connecting part 232 is connected to the driving end of the driving member 24, and the cylinder is lifted and lowered to press or release the left locking block, the left eyeglass ring, the middle beam, the right eyeglass ring and the right locking block.

[0081] Embodiment 5:

[0082] This embodiment provides a laser welding machine, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0083] The driving mechanism 5 comprises:

[0084] The second driving motor 51 is installed at the bottom of the workbench. The driving end of the second driving motor 51 is connected to the rotating disc to drive the rotating disc to rotate.

[0085] In the present technical solution, the second driving motor 51 is a conventional motor, which drives the rotating disk to rotate by rotating.

[0086] Embodiment 6:

[0087] This embodiment provides a laser welding machine, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0088] An argon protection nozzle 9 is installed on the laser welding head 43 .

[0089] In the present technical solution, during the laser welding process performed by the laser welding head 43, the argon protection nozzle 9 sprays argon gas to the welding point. When welding eyeglass frames made of materials such as copper, its alloys and stainless steel, argon is used as welding protection gas to prevent the eyeglass frames from being oxidized or nitrided by the air, thereby avoiding burns and other welding defects caused thereby, thereby ensuring high quality of welding.

[0090] Embodiment 7:

[0091] This embodiment provides a laser welding machine, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0092] A plurality of material placing troughs 10 are installed on one side of the workbench.

[0093] In the present technical solution, the material placing trough 10 is located in the loading area, and a plurality of material placing troughs 10 are used to place the eyeglass frame components to be welded.

[0094] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A laser welding machine, comprising a workbench, characterized in that: Also includes: A rotating disc (1) is mounted on a workbench; A plurality of positioning mechanisms (2) are arranged in a circular array on the circumference of the top of the rotating disc (1), and a positioning groove (6) matching the shape of the workpiece is formed on the top of each of the plurality of positioning mechanisms (2); A visual inspection mechanism (3) is installed on a workbench, wherein the visual inspection mechanism (3) comprises a machine vision camera (31) for inspecting welding points on a workpiece to be welded on the positioning mechanism (2); A welding mechanism (4) is installed on a workbench and is used to weld the welding points of the workpiece after being inspected by the visual inspection mechanism (3); A driving mechanism (5) is mounted on the bottom of the rotating disc (1) and is used to drive the rotating disc (1) to rotate; The welding mechanism (4) comprises a Y-adjustable bracket (41) arranged on a workbench and movable in the Y direction, an X-adjustable bracket (42) arranged on the Y-adjustable bracket (41) and movable in the X direction, a laser welding head (43) mounted on the X-adjustable bracket (42), and a driving assembly (44) for driving the Y-adjustable bracket (41) and the X-adjustable bracket (42) to move, wherein the laser welding head (43) is directly above the positioning mechanism (2), and the driving assembly (44) is located at the bottom of the workbench; It also includes a control system for controlling the rotating disc (1), the visual detection mechanism (3), the welding mechanism (4) and the driving mechanism (5) to operate in coordination with each other.

2. A laser welding machine according to claim 1, characterized in that: The driving assembly (44) comprises: Two screw rod assemblies (441) are respectively installed on the workbench and in the Y-axis adjustment bracket (41); Two first drive motors (442) are respectively mounted on the workbench and one end of the Y-axis adjustment bracket (41); a drive end of the first drive motor (442) is connected to one end of the screw assembly (441) for driving the screw assembly (441) to rotate; The Y-axis adjustment bracket (41) is mounted on a screw assembly (441) on a workbench, and the X-axis adjustment bracket (42) is mounted on the screw assembly (441) inside the Y-axis adjustment bracket (41).

3. A laser welding machine according to claim 1, characterized in that: The positioning mechanism (2) comprises: A base (21) is mounted on the circumference of the top of the rotating disc (1); A mold (22) is mounted on the top of the base (21); The positioning groove (6) is provided at the top of the mold (22), and a piece removal opening (7) connected to the positioning groove (6) is symmetrically provided on one side of the mold (22).

4. A laser welding machine according to claim 3, characterized in that: The mold (22) is provided with avoidance holes (8) at the welding points of the workpiece.

5. A laser welding machine according to claim 3, characterized in that: The positioning mechanism (2) further comprises: A pressing portion (23) is located above the mold (22), and the pressing portion (23) comprises five pressing plates (231) arranged in sequence, and one end of the five pressing plates (231) are connected via a connecting portion (232); The driving member (24) is mounted on the rotating disc (1), and the driving end of the driving member (24) is connected to the connecting portion (232) and is used to drive the pressing portion (23) to press the workpiece disposed in the positioning groove (6).

6. A laser welding machine according to claim 1, characterized in that: The driving mechanism (5) comprises: The second drive motor (51) is installed at the bottom of the workbench, and the drive end of the second drive motor (51) is connected to the rotating disc (1) to drive the rotating disc (1) to rotate.

7. The laser welding machine according to claim 1, characterized in that: An argon gas protection nozzle (9) is installed on the laser welding head (43).

8. The laser welding machine according to claim 1, characterized in that: A plurality of material placement troughs (10) are installed on one side of the workbench.

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