Welding device for automobile safety air bag generator

[0026] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0027] As shown in FIG. 2 , a welding device for an automobile airbag generator in this embodiment includes a welding host, which includes a frame 10 , a welding head 20 disposed on the frame 10 , and a welding head 20 disposed below the welding head 20 . The multi-station turntable 30, a plurality of turntables 31 arranged on the multi-station turntable 30, and a generator fixture 40 arranged on the turntable 31 to rotate with the turntable 31. The generator (airbag generator) 50 on the generator fixture 40 is driven by the turntable 31 to rotate together, and the generator 50 can be welded together with the welding head 20 on the frame 10, and then the position of the turntable 31 is adjusted by adding a The multi-station turntable 30 can simultaneously carry out the feeding and unloading processes of the generator 50 during the welding of the welding generator 50, which greatly reduces the production cycle of the workpiece and improves the production efficiency; and the workpiece is welded before each welding. Accurate positioning can be carried out, thereby ensuring the stable and reliable welding quality of the workpiece. This equipment adopts laser welding, which has fast welding speed, small deformation of workpiece and low maintenance cost. It can meet the requirements of high-strength welding and has high welding efficiency.

[0028] In this embodiment, the multi-station turntable 30 is a three-station turntable, and the three stations correspond to three areas, namely: a material loading position, a welding position, and a material unloading position, and each station is provided with a rotating shaft 33, The turntable 31 is provided on the rotating shaft 33 . The feeding and unloading process of the generator 50 is carried out at the same time as the welding of the generator 50, which greatly improves the working efficiency of the equipment. Of course, the number of stations of the multi-station turntable 30 can also be adjusted according to actual production requirements. For example, the loading and unloading can be combined into one station. When welding the generator 50, the generator 50 that has been welded is unloaded first. A new generator 50 is installed, the multi-station turntable 30 is rotated, and the positions of the generator 50 after welding and the generator 50 to be welded are switched, so that other processes can be performed simultaneously with the welding generator 50, thereby improving the system efficiency.

[0029] As shown in Figures 2 and 4 , the welding equipment further includes a position adjusting mechanism 21 disposed between the frame 10 and the welding head 20 for adjusting the position of the welding head 20 . The position adjustment mechanism 21 includes a B-axis rotation mechanism 211 for adjusting the welding angle of the welding head 20 (the B-axis rotation mechanism in this embodiment rotates with the Y-axis as the rotation axis), and is used to drive the B-axis rotation mechanism 211 to perform a lifting motion. The Z-axis mechanism 212, the Y-axis mechanism 213 for driving the movement of the Z-axis mechanism 212, and the X-axis mechanism 214 for driving the movement of the Y-axis mechanism 213, the X-axis mechanism 214 is provided on the rack 10. By adding a position adjustment mechanism 21, it is used to adjust the position of the welding head 20 to meet the size requirements of different types of generators 50 and improve the versatility of the equipment; the Z-axis mechanism 212, X-axis mechanism 214, Y-axis mechanism 213 All are driven by high-precision guide rails and screw rods, and automatic positioning and movement in three directions of XYZ are realized through servo motors, with fast movement speed and high positioning accuracy; the B-axis rotating mechanism 211 adopts turbine worm drive, which not only has high positioning accuracy, but also has high positioning accuracy. Moreover, it also has a self-locking function, which can be used to adjust the light-emitting angle of the welding head 20 so as to meet the requirements of the welding process.

[0030] As shown in Figures 1 and 2, the welding equipment further includes a feeding manipulator 60 arranged on one side of the upper material position of the multi-station turntable 30, a feeding manipulator 61 arranged on one side of the lower material position of the multi-station turntable 30, And the assembly line 70 arranged on one side of the feeding manipulator 60 and the feeding manipulator 61 . By adding a feeding manipulator 60, a feeding manipulator 61 and an assembly line 70, the feeding manipulator 60 transports the generator 50 to be welded on the assembly line 70 to the feeding area of ​​the multi-station turntable, and the feeding manipulator 61 will be more The welding-completed generator 50 on the unloading area of ​​the station turntable is transported to the assembly line, so that automatic loading and unloading of laser welding can be realized, work efficiency is improved, and labor costs are reduced.

[0031] As shown in Figures 2 and 3, the loading manipulator 60 includes a loading gripper 601 for grasping or loosening the workpiece, and is used to drive the loading gripper 601 to go back and forth between the assembly line 70 and the loading of the generator fixture 40. The rotating mechanism 602 is used to drive the feeding rotating mechanism 602 to perform a lifting and lowering movement of the feeding lifting mechanism 603 . The feeding gripper 601 is a pneumatic chuck. The feeding rotating mechanism 602 includes a feeding swing arm and a feeding swing arm motor for driving the feeding swing arm to rotate, and the feeding gripper 601 is arranged on the feeding swing arm. The feeding and lifting mechanism 603 includes feeding and lifting cylinders arranged on both sides of the feeding rotating mechanism 602 . In actual production, the feeding rotation mechanism 602 drives the feeding gripper 601 to the top of the assembly line; the feeding lifting mechanism 603 lowers the feeding gripper 601 to a certain height; the feeding gripper 601 clamps the generator to be welded; The lifting mechanism 603 lifts up with the feeding jaw 601; the feeding rotation mechanism 602 drives the feeding jaw 601 with the generator to be welded to rotate to the top of the generator fixture 40 in the feeding area of ​​the multi-station rotary table 30; The material lifting mechanism 603 descends with the feeding jaws 601 to the generator fixture 40; the feeding jaws 601 release the generator to be welded to complete the feeding.

[0032]The blanking manipulator 61 includes blanking jaws 611 for grasping or loosening the workpiece, and is used to drive the blanking jaws 611 to go back and forth between the assembly line 70 and the blanking rotation mechanism 612 of the generator fixture 40, and is used to drive the blanking jaws 611. The material rotating mechanism 612 performs the lifting and lowering movement of the unloading lifting mechanism 613 . The feeding gripper 601 is a pneumatic chuck. The blanking rotation mechanism 612 includes a blanking swing arm and a blanking swing arm motor for driving the rotation of the blanking swing arm, and the blanking jaws 611 are arranged on the blanking swing arm. The blanking and lifting mechanism 613 includes a blanking and lifting cylinder arranged below the blanking rotating mechanism 612 . In actual production, the blanking rotation mechanism 612 drives the blanking jaws 611 to rotate to the top of the generator fixture 40; the blanking lifting mechanism 613 drives the blanking jaws 611 to descend to the generator fixture 40; The generator 50 that has been welded on the fixture 40 is clamped; the blanking lifting mechanism 613 drives the blanking jaw 611 to rise away from the generator fixture 40; the blanking rotation mechanism 612 drives the blanking jaw 611 to rotate to reach the assembly line 70 Above; the blanking lifting mechanism 613 drives the blanking jaws 611 to descend; the blanking jaws 611 release the generator 50 that has completed the welding to complete the blanking.

[0033] As shown in Figures 2 and 6, the generator jig 40 includes a jig base 41 on the turntable for placing the generator, a pressing arm 42 on the jig base 41 for pressing the generator, The pressing mechanism 43 provides pressing force to the pressing arm 42 . The pressing mechanism 43 includes a connecting rod 431 arranged on the fixture base 41 , and a compression spring 432 arranged between the connecting rod 431 and the pressing arm 42 , and the pressing arm 42 is slidably sleeved on the connecting rod 431 . Through the cooperation between the pressing mechanism 43 and the pressing arm 42 , the fixing function of the generator placed on the generator fixture can be completed. The generator fixture 40 further includes a limit block 44 disposed on one side of the pressing mechanism 43 for generator positioning. By adding a limit block 44, which can be used for the positioning of the generator 50 on the generator fixture 40, the position of the generator 50 on the generator fixture 40 can be kept consistent, the welding accuracy can be improved, and the appearance of welding products can be prevented. The problem of uneven quality.

[0034] As shown in Figures 2, 3 and 6, the feeding manipulator 61 further includes a feeding link rotating mechanism 604 disposed above the feeding jaw 601 for driving the feeding jaw 601 to rotate; the feeding manipulator 61 also includes a blanking link rotating mechanism 614 disposed above the blanking jaw 611 for driving the blanking jaw 611 to rotate. During the feeding process, when the feeding lifting mechanism 603 with the feeding jaws 601 descends to the generator fixture 40, the feeding jaws 601 clamp the workpiece and rotate on the fixture base 41. After reaching the pressing arm 42 , it continues to rotate until the workpiece contacts the positioning block 44 and then stops rotating, and the pressing arm 456 always presses the workpiece under the action of the spring 454 . Similarly, when blanking, the blanking link rotating mechanism 614 drives the already welded generator on the blanking jaw 611 to rotate in reverse, that is, to leave the generator fixture 40, and then complete the blanking action. In this embodiment, the cylinder drives the connecting rod to drive the feeding gripper 601 and the unloading gripper 611 at one end of the connecting rod to complete the rotational movement. Of course, the direct drive of the motor can also be directly used instead of the drive of the cylinder connecting rod, which can also achieve the effect of driving the feeding gripper 601 and the blanking gripper 611 to complete the rotational movement.

[0035] As shown in Figures 1 and 7 , the assembly line 70 includes an assembly line frame 71 , a workpiece pallet 72 , a conveying assembly 73 , a jacking mechanism 74 , and an induction switch 75 . The jacking mechanism 74 includes a mounting plate 741 , a cylinder 742 , a second pneumatic pin 743 , a positioning block 744 and a guide sleeve 745 . The workpiece support plate 72 is driven by the conveying assembly 73 to move. When it moves to the feeding station, it hits the induction switch 75. The lifting mechanism 74 lifts the workpiece support plate 72. After the material is loaded, the workpiece support plate 72 descends. It continues to move on the conveying assembly 73, and is also lifted up when it moves to the unloading station. After the unloading is completed, it continues to move to the next station. The assembly line 70 has a plurality of workpiece support plates 72 for periodic and cyclic movement, thereby To ensure the workpiece (generator) feeding fast and stable.

[0036] As shown in Figures 2 and 5 , the welding equipment further includes a locking mechanism 32 arranged on the multi-station turntable 30 for locking the turntable 31 . The locking mechanism 32 includes a first pneumatic pin 321 arranged on the turntable 31 , and the turntable 31 is provided with a positioning hole 311 which is matched with the first pneumatic pin 321 . The turntable 31 can be snapped in by the cooperation of the first pneumatic pin 321 and the positioning hole 311 . When the welding work is in progress, the turntable 31 needs to rotate with the generator 50, and the first pneumatic pin 321 shrinks; when loading or unloading, the generator 50 rotates relative to the turntable 31, and the first pneumatic pin 321 extends The turntable 31 is clamped. It can ensure the stability of the generator 50 rotating feeding or unloading, reduce work errors and improve work efficiency. The welding equipment also includes a pneumatic-electric rotary joint 322 and a detection switch 323. The electric rotary joint transmits electrical signals and compressed air to the first pneumatic pin 321, so that the multi-station turntable 30 can be rotated arbitrarily in one direction; detection The switch 323 is installed on the rack 10 and is used to determine whether the generator 50 is on the generator fixture 40 .

[0037] The welding equipment further includes a turntable driving motor 80 for driving the multi-station turntable 30 to rotate, and a cam divider 81 disposed between the multi-station turntable 30 and the turntable driving motor 80 . The multi-station turntable 30 can be rotated by the turntable drive motor 80; the multi-station turntable 30 can be driven to perform intermittent motion through the cam divider 81, so as to meet the needs of the multi-station turntable 30 for fast switching between different stations. Improve system efficiency.

[0038] The welding equipment further includes a turntable motor 82 for driving the turntable 31 to rotate, and a translation mechanism 83 arranged on the frame 10 for driving the turntable motor 82 to move back and forth. There is gear transmission between the turntable motor 82 and the turntable 31 . The turntable motor 82 is arranged below the welding position, a driving gear 821 is arranged on the turntable motor, and a driven gear 331 is arranged below the rotating shaft 33 . When the multi-station turntable 30 drives the turntable 31 to rotate to the welding position, the translation mechanism 83 drives the turntable motor 82 to extend, the driving gear 821 meshes with the driven gear 331, and the driving turntable 31 drives the generator 50 to be welded to rotate together to complete the welding. Then the translation mechanism 83 drives the turntable motor 82 to retract. The welding of the next generator 50 may repeat the above steps. The rotation of the plurality of turntables 31 on the multi-station turntable 30 can be driven by one turntable motor 82 , which greatly improves work efficiency and saves costs. Of course, a turntable motor 82 may also be provided under each turntable 31 here, so as to drive the turntable 31 to rotate and help the generator 50 to complete the welding.

[0039] As shown in Figures 1 and 2, the welding equipment further includes a protective cover 90, a laser, an optical fiber, a chiller, a dust purifier, an air compressor and a control system. The protective cover 90 can be used to prevent the adverse effects of the external environment on the welding work during the welding work, and at the same time, it can protect the safety of the operator. The laser is a laser emitting device, which converts electrical energy into light energy and emits laser light with different wavelengths according to different working media. The optical fiber is a laser transmission tool, one end is connected to the laser, and the other end is connected to the welding head 20 . The chiller is a cooling water device that provides a constant temperature and constant current for the laser and the welding head 20 to ensure the stable operation of the laser and the welding head 20 . One end of the welding head 20 is connected to an optical fiber, which realizes the focusing of the light beam and outputs light beams with different spot diameters. The dust purifier collects the smoke and dust generated by welding and the dust in the air through the high-temperature air duct, so that the particles suspended in the air are purified. The air compressor provides constant pressure and clean compressed air for pneumatic pins, assembly lines, welding head air curtains, etc. The control system connects the laser, the welding head 20, the position adjustment mechanism 21, the feeding manipulator 60, the feeding manipulator 61, the multi-station turntable 30, the turntable 31, the assembly line 70, etc., and realizes the automobile airbag by setting the program. The generator's automatic welding function.

[0040] Automatic welding process:

[0041] 1. The present invention adopts manual feeding, and the generator 50 to be welded is placed on the workpiece support plate 72 on the assembly line 70. The workpiece support plate 72 moves under the driving of the transmission assembly 73, and hits the induction switch when it moves to the loading position. After 75, the lifting mechanism 74 lifts the workpiece support plate 72, and sends a signal to the control system. After the control system receives the signal, the control system drives the feeding manipulator 60 on the side of the feeding position to the generator fixture on the multi-position turntable 30. 40 is loaded, and the generator 50 is positioned and clamped.

[0042] 2. Positioning and clamping process: First, the feeding jaw 601 on the feeding manipulator 60 clamps the generator 50 from the workpiece support plate 72 of the assembly line 70, then lifts the generator 50, and then swings the generator 50 to The generator jig 40 goes up and then descends, and the generator 50 is placed on the jig base 41. The feeding link rotating mechanism 604 drives the feeding jaw 601 to rotate, and the feeding jaw 601 clamps the workpiece on the jig base 41. During the rotation, the generator 50 first touches the pressing arm 42 and then continues to rotate until the generator 50 contacts the limit block 44 and then stops rotating, and the pressing arm 42 is always pressed under the action of the compression spring 432. The unloading process of the generator 50 is exactly opposite to the loading process.

[0043] 3. Before the positioning and clamping of the generator 50, the first pneumatic pin 321 on the multi-position turntable 30 is inserted into the positioning hole 311 of the turntable 31 for positioning, so as to prevent the generator fixture 40 and the driven gear 331 on the turntable 31 from being clamped. Rotation; when the last generator 50 leaves the workpiece support plate 72 on the assembly line 70, the workpiece support plate 72 descends on the assembly line 70, and after moving to the unloading position, the workpiece support plate 72 is lifted again, waiting for unloading, The next workpiece pallet 72 moves to the material loading position with the generator 50 to prepare for the next cycle of material loading.

[0044] 4. After the feeding of the generator 50 is completed, after the detection switch 323 detects that the generator 50 is on the generator fixture 40, the multi-station turntable 30 rotates, and the generator 50 is sent to the welding position and stops, and the position adjustment mechanism 21 Move the welding head 20 to the designated position and keep it still, while the driving gear 821 is driven by the translation mechanism 83 to mesh with the driven gear 331 on the rotating shaft 33. After the meshing is confirmed, the first pneumatic pin 321 is positioned from the turntable 31 The hole 311 is pulled out to release the fixing; then the turntable motor 82 drives the driving gear 821 to drive the driven gear 331 to rotate, and the driven gear belt 331 rotates the turntable 31, the generator fixture 40 and the generator 50, while the welding head 20 Perform light-emitting welding.

[0045] 5. After the generator 50 completes one rotation of welding, the first pneumatic pin 321 fixes the turntable 31 again, the driving gear 821 is separated from the driven gear 331 under the drive of the translation mechanism 83, and then the multi-station turntable 30 carries the generator 50 moves to the unloading level, and the control system drives the unloading manipulator 61 at the unloading level to send the generator 50 from the generator fixture 40 to the workpiece pallet 72 of the assembly line 70 until the workpiece pallet 72 is filled with the generator 50 Afterwards, the workpiece support plate 72 descends onto the assembly line 70 and moves to the next station, and the welding of the workpiece on the workpiece support plate 72 is completed.

[0046] When the workpiece is loaded, the welding area welds the workpiece, and the unloading area unloads the workpiece. These three actions are carried out at the same time, which greatly reduces the production cycle of the workpiece and improves the production efficiency; Accurate positioning can be carried out before welding, thus ensuring stable and reliable welding quality of the workpiece.

[0047] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them. For those skilled in the art, the technical solutions described in the above embodiments can be modified, or some of the technical features can be modified. Equivalent replacements are made; and all such modifications and replacements shall fall within the protection scope of the appended claims of the present invention.