A laser welding device for automobile welding line

Abstract

The invention discloses a laser welding device for an automobile welding line, which comprises: an industrial robot; a transfer arm rotatably mounted on the mechanical arm of the industrial robot; a main frame fixed below the transfer arm; a variable seam adjustment component arranged below the main frame, the variable seam adjustment component can slide along the weld of an automobile welding plate and adjust the size of the weld accordingly; and an intermediate welding device arranged in the middle of the lower end surface of the main frame.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile welding equipment, in particular to a laser welding device for an automobile welding line. Background Art

[0002] Welding is an indispensable process in the automatic assembly line of automobiles. To ensure the welding effect, the existing technology mostly uses welding robots for welding. However, when the existing welding robots weld the roof, the clamping and fixing effect of the frame is not good, resulting in different weld sizes. At the same time, it is difficult to effectively control the weld size during welding, and the support point needs to be continuously adjusted.

[0003] Therefore, those skilled in the art provide a laser welding device for an automobile welding line to solve the problems raised in the above background technology. Summary of the invention

[0004] To achieve the above object, the present invention provides the following technical solution: a laser welding device for an automobile welding line, comprising:

[0005] Industrial robots;

[0006] A transfer arm, rotatably mounted on the mechanical arm of the industrial robot;

[0007] A main frame body, fixed below the transfer arm;

[0008] A variable seam adjustment component is arranged below the main frame, and the variable seam adjustment component can slide along the weld of the automobile welding plate and adjust the size of the weld accordingly; and

[0009] The middle welding device is arranged at the middle part of the lower end surface of the main frame.

[0010] Further, as a preference, the variable gap adjustment component comprises:

[0011] The guide rail frame is correspondingly arranged on each automobile welding plate;

[0012] A side positioning shaft frame is detachably mounted on the guide rail frame, and a plurality of negative pressure adsorption seats are provided on the side positioning shaft frame, and the negative pressure adsorption seats are fixed to the automobile welding plate;

[0013] A connecting frame is symmetrically arranged below the main frame, a sliding rod is transversely fixed to the main frame, and the connecting frame is slidably arranged on the sliding rod; and

[0014] The steering shaft is relatively rotatably arranged on the connecting frame, and a roller seat is fixed on the steering shaft, and the roller seat can slide along the guide rail frame.

[0015] Further, preferably, the deflection angle range of the roller seat is within the range of 0° to 45°.

[0016] Further, preferably, the intermediate welding device comprises:

[0017] The adjustment frame is horizontally fixed at the middle part of the lower end surface of the main frame;

[0018] A sliding member, slidably disposed on the adjustment frame; and

[0019] A laser welding device is vertically fixed on the sliding member.

[0020] Further, preferably, the laser welding device comprises:

[0021] Mount the rack;

[0022] An intermediate rack is arranged below the upper rack, a universal hinge shaft is vertically fixed on the intermediate rack, and one end of the universal hinge shaft is connected to the upper rack;

[0023] A laser welding head is vertically arranged on the intermediate frame, a stabilizing frame is fixed on the laser welding head, and the stabilizing frame is connected to the intermediate frame;

[0024] An inner guide shaft is transversely slidably disposed on the intermediate disc frame, and one end of the stabilizing frame is fixed to the inner guide shaft;

[0025] A connecting spring connected between the inner guide shaft and the intermediate disc frame; and

[0026] The side shaft is relatively rotatably arranged on one side of the intermediate disk frame. A driving motor is installed on the intermediate disk frame, and the output end of the driving motor is fixed to the side shaft.

[0027] Further, preferably, the contact surface between the lateral shaft and the inner guide shaft is configured as a wedge-shaped inclined surface structure.

[0028] Further, as a preference, a driving disk is rotatably provided on one side of the lower end surface of the upper frame, a linkage rod is rotatably provided below the driving disk, and one end of the linkage rod is rotatably sleeved on the universal hinge shaft.

[0029] Further, preferably, the deflection angle of the laser welding head is between -20° and 20°.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] In the present invention, the automobile welding plate does not need to be over-clamped. By installing a guide rail frame on the automobile welding plate, when the industrial robot drives the main frame to slide along the guide rail frame, the weld can change accordingly, and the laser welding device can perform corresponding welding work based on the size of the weld, with high welding accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the present invention;

[0033] Figure 2 It is a structural schematic diagram of the variable seam adjustment component in the present invention;

[0034] Figure 3 It is a structural schematic diagram of the intermediate welding device in the present invention;

[0035] Figure 4 This is a schematic diagram of the welding point positioning adjustment in the present invention;

[0036] Figure 5 The structure of the laser welding device in the present invention is shown in FIG. Figure 1 ;

[0037] Figure 6 The structure of the laser welding device in the present invention is shown in FIG. Figure 2 ;

[0038] Figure 7 A schematic diagram of the welding process in the present invention;

[0039] In the figure: 1. main frame; 11. industrial robot; 2. middle welding device; 21. adjustment frame; 22. sliding member; 3. variable seam adjustment assembly; 31. guide frame; 32. side positioning shaft frame; 33. negative pressure adsorption seat; 34. sliding rod; 35. connecting frame; 36. steering shaft; 37. roller seat; 4. laser welding device; 41. upper frame; 42. middle disk frame; 43. stabilizing frame; 44. laser welding head; 45. inner guide shaft; 46. side shaft; 47. driving motor; 48. driving disk. DETAILED DESCRIPTION

[0040] See also Figure 1 In an embodiment of the present invention, a laser welding device for an automobile welding line includes:

[0041] Industrial robots 11;

[0042] A transfer arm 12, rotatably mounted on the mechanical arm of the industrial robot 11;

[0043] The main frame 1 is fixed below the transfer arm 12;

[0044] A variable seam adjustment component 3 is arranged below the main frame 1, and the variable seam adjustment component 3 can slide along the weld of the automobile welding plate and adjust the size of the weld accordingly; and

[0045] The intermediate welding device 2 is arranged in the middle of the lower end surface of the main frame 1, that is, the intermediate welding device can be driven by an industrial robot to weld along the weld. During welding, multiple welding points can be initially fixed first, and then the overall welding can be carried out under sliding displacement to further improve the welding effect.

[0046] In this embodiment, the variable gap adjustment component 3 includes:

[0047] The guide rail frame 31 is correspondingly arranged on each automobile welding plate;

[0048] The side positioning shaft frame 32 is detachably mounted on the guide rail frame 31. The side positioning shaft frame 32 is provided with a plurality of negative pressure adsorption seats 33, and the negative pressure adsorption seats 33 are fixed to the automobile welding plate; thereby the two guide rail frames are correspondingly mounted on the automobile welding plate;

[0049] A connecting frame 35 is symmetrically arranged below the main frame 1. A sliding rod 34 is transversely fixed to the main frame 1. The connecting frame 35 is slidably arranged on the sliding rod 34; and

[0050] The steering shaft 36 is rotatably arranged on the connecting frame 35. A roller seat 37 is fixed on the steering shaft 36. The roller seat 37 can slide along the guide frame 31. The distance between the roller seats can be adjusted by the sliding action of the connecting frame, so that the roller seat can gradually correct the size of the weld during sliding.

[0051] As a preferred embodiment, the deflection angle range of the roller seat 37 is within the range of 0° to 45°, so as to achieve bevel welding.

[0052] In this embodiment, the intermediate welding device 2 includes:

[0053] The adjustment frame 21 is horizontally fixed at the middle part of the lower end surface of the main frame body 1;

[0054] A sliding member 22 is slidably disposed on the adjustment frame 21; and

[0055] The laser welding device 4 is vertically fixed on the sliding member 22. In particular, the horizontal positioning of the laser welding device is adjusted by sliding the sliding member, so that the laser welding device can be suspended at different welding points, so that welding work can be performed at a suitable weld size to ensure welding accuracy.

[0056] In this embodiment, the laser welding device 4 includes:

[0057] Upper rack 41;

[0058] An intermediate rack 42 is disposed below the upper rack 41, a universal hinge shaft is vertically fixed on the intermediate rack 42, and one end of the universal hinge shaft is connected to the upper rack 41;

[0059] A laser welding head 44 is vertically arranged on the intermediate frame 42, and a stabilizing frame 43 is fixed on the laser welding head 44, and the stabilizing frame 43 is connected to the intermediate frame 42;

[0060] An inner guide shaft 45 is slidably disposed on the intermediate disk frame 42 in a transverse direction, and one end of the stabilizing frame 43 is fixed to the inner guide shaft 45;

[0061] A connecting spring connected between the inner guide shaft 45 and the intermediate disc frame 42; and

[0062] The side shaft 46 is rotatably arranged on one side of the intermediate disk frame 42. A driving motor 47 is installed on the intermediate disk frame 42. The output end of the driving motor 47 is fixed to the side shaft 46 for driving the side shaft to continuously rotate.

[0063] In this embodiment, the contact surface between the side shaft 46 and the inner guide shaft 45 is set to a wedge-shaped inclined surface structure. In particular, when the side shaft is continuously rotating, it can push the inner guide shaft to slide axially through the wedge-shaped inclined surface and form a small left and right shaking effect, so that the laser welding head can form a small fish pattern weld during welding, with good welding effect and no biting or broken welds.

[0064] As a preferred embodiment, a driving disk 48 is rotatably provided on one side of the lower end surface of the upper frame 41, and a linkage rod is rotatably provided below the driving disk 48, and one end of the linkage rod is rotatably sleeved on the universal hinge shaft, wherein the driving disk can continuously rotate to drive the laser welding head to swing greatly, and at this time, in conjunction with the continuous rotation of the lateral shaft, the axial swing of the inner guide shaft is made to be at the same frequency and direction or at the same frequency and opposite direction, thereby adjusting the swing amplitude.

[0065] In this embodiment, the deflection angle of the laser welding head 44 is between -20° and 20°.

[0066] Specifically, guide rail frames are preferentially installed on corresponding automobile welding panels. At this time, the distance between the connecting frames is adjusted so that the roller seat can gradually adjust the weld size during sliding. At the same time, the overhead weld points of the laser welding device are adjusted, and multiple weld points are initially fixed along the weld driven by an industrial robot, and then the overall welding is performed under sliding displacement to ensure the welding effect.

[0067] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A laser welding device for an automobile welding line, characterized in that: It includes: Industrial robots (11); A transfer arm (12) rotatably mounted on the mechanical arm of the industrial robot (11); A main frame (1) is fixed below the transfer arm (12); A variable seam adjustment component (3) is arranged below the main frame (1), and the variable seam adjustment component (3) can slide along the weld of the automobile welding plate and adjust the size of the weld accordingly; as well as An intermediate welding device (2) is arranged at the middle portion of the lower end surface of the main frame (1); The variable gap adjustment component (3) comprises: A guide rail frame (31) is correspondingly arranged on each automobile welding plate; A side positioning shaft frame (32) is detachably mounted on the guide rail frame (31), and a plurality of negative pressure adsorption seats (33) are provided on the side positioning shaft frame (32), and the negative pressure adsorption seats (33) are fixed to the automobile welding plate; A connecting frame (35) is symmetrically arranged below the main frame (1); a sliding rod (34) is transversely fixed to the main frame (1); and the connecting frame (35) is slidably arranged on the sliding rod (34); and A steering shaft (36) is relatively rotatably arranged on the connecting frame (35), and a roller seat (37) is fixed on the steering shaft (36), and the roller seat (37) can slide along the guide rail frame (31).

2. The laser welding device for an automobile welding line according to claim 1, characterized in that: The deflection angle of the roller seat (37) is in the range of 0° to 45°.

3. The laser welding device for an automobile welding line according to claim 1, characterized in that: The intermediate welding device (2) comprises: An adjustment frame (21) is horizontally fixed at the middle of the lower end surface of the main frame body (1); a sliding member (22) slidably disposed on the adjustment frame (21); and A laser welding device (4) is vertically fixed on the sliding member (22).

4. The laser welding device for an automobile welding line according to claim 3, characterized in that: The laser welding device (4) comprises: Upper rack (41); An intermediate rack (42) is arranged below the upper rack (41), a universal hinge shaft is vertically fixed on the intermediate rack (42), and one end of the universal hinge shaft is connected to the upper rack (41); A laser welding head (44) is vertically arranged on the intermediate disk frame (42), a stabilizing frame (43) is fixed on the laser welding head (44), and the stabilizing frame (43) is connected to the intermediate disk frame (42); An inner guide shaft (45) is transversely slidably disposed on the intermediate disk frame (42), and one end of the stabilizing frame (43) is fixed to the inner guide shaft (45); A connecting spring connected between the inner guide shaft (45) and the intermediate disc frame (42); and The lateral shaft (46) is relatively rotatably arranged on one side of the intermediate disk frame (42). A driving motor (47) is installed on the intermediate disk frame (42), and the output end of the driving motor (47) is fixed to the lateral shaft (46).

5. The laser welding device for an automobile welding line according to claim 4, characterized in that: The contact surface between the lateral shaft (46) and the inner guide shaft (45) is configured as a wedge-shaped inclined surface structure.

6. The laser welding device for an automobile welding line according to claim 5, characterized in that: A driving disk (48) is rotatably provided on one side of the lower end surface of the upper frame (41), a linkage rod is rotatably provided below the driving disk (48), and one end of the linkage rod is rotatably sleeved on the universal hinge shaft.

7. The laser welding device for an automobile welding line according to claim 6, characterized in that: The deflection angle of the laser welding head (44) is between -20° and 20°.

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