A mobile phone shell laser welding machine and a welding method

Abstract

The application discloses a mobile phone shell and spring laser welding machine and a welding method, and the laser welding machine comprises a rack, a mobile phone middle shell conveying system, a flying feeder feeding assembly, a mobile phone spring feeding system, a CCD visual detection device and a laser welding system which are installed on the rack; the mobile phone middle shell conveying system comprises a welding jig and a jig linear conveying module, and the welding jig comprises a middle shell positioning mechanism and a spring pressing mechanism; the mobile phone spring feeding system is used for feeding the mobile phone spring conveyed by the flying feeder feeding assembly to the mobile phone middle shell in the welding jig, and the mobile phone spring feeding system comprises a feeding mechanical arm, a lifting mechanism is installed on the feeding mechanical arm, a rotating mechanism is arranged on the power output end of the lifting mechanism, and a material taking mechanism is arranged on the power output end of the rotating mechanism. The application can prevent the mobile phone middle shell and the mobile phone spring from being displaced during transmission and welding, has high material taking and feeding precision, can adjust the direction and position of the mobile phone spring, and has high welding precision.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser welding equipment, in particular to a mobile phone spring piece laser welding machine and a welding method. BACKGROUND

[0002] Laser welding processing technology uses laser beam to replace traditional mechanical knife, has the advantages of high precision, fast welding, not limited to welding pattern restriction, smooth cutting, low processing cost, etc. Laser welding processing needs to use laser welding machine. The mobile phone middle shell is one of the main structural parts of the smart phone, and the mobile phone spring piece usually needs to be welded on the mobile phone middle shell. Because laser welding processing technology has the above-mentioned various advantages, the current welding process of mobile phone middle shell and mobile phone spring piece gradually adopts laser welding processing technology for welding. However, the current laser welding machine has the following defects in the process of welding the mobile phone spring piece on the mobile phone middle shell: on the one hand, it is difficult to realize the automatic feeding of the mobile phone middle shell and the mobile phone spring piece; on the other hand, it is difficult to accurately place the mobile phone spring piece on the set position of the mobile phone middle shell; on the other hand, it is difficult to press the mobile phone spring piece tightly on the mobile phone middle shell. During the welding process of the laser welding system, the mobile phone spring piece is easy to displace, resulting in inaccurate welding.

[0003] Referring to Chinese patent document CN215280389U, it discloses a mobile phone shell automatic guiding and welding machine, which comprises a rack assembly, an installation platform is arranged in the rack assembly, a rotating disc assembly is arranged in the middle of the installation platform, a feeding assembly and a welding assembly are arranged on the side of the rotating disc assembly, the rotating disc assembly comprises a rotating disc and a rotating disc driving element, a certain number of positioning jigs are equidistantly arranged on the top surface of the rotating disc, the feeding assembly comprises a feeder and a four-axis robot, a shell suction head module is arranged at the tail end of the four-axis robot, the welding assembly comprises a translation linear module, a lifting linear module arranged at the movable end of the translation linear module, and a laser welding module arranged at the movable end of the lifting linear module, and a pressing module is arranged on the installation platform below the laser welding module. The welding machine can realize automatic feeding and pressing of mobile phone shell, but the welding machine still has the following technical defects: (1) the welding machine does not have a pressing device on the positioning jig, and the pressing of the welding machine is realized by the pressing module below the laser welding module, when the mobile phone shell is moved to the positioning jig by the manipulator, the positioning jig and the mobile phone shell thereon need to rotate step by step with the rotating disc assembly, since the positioning jig will vibrate during rotation, it is easy to cause the mobile phone shell on the positioning jig to displace, and during the rotation of the positioning jig, it will accelerate or decelerate several times, which is also easy to cause the mobile phone shell on the positioning jig to displace under the action of inertia, finally leading to the problem of inaccurate laser welding; (2) the shell suction head module of the feeding assembly of the welding machine cannot lift and rotate by itself, but relies on the four-axis robot to drive the shell suction head module to rotate, which is easy to reduce the feeding and discharging precision of the shell suction head module, and after the shell suction head module takes out the mobile phone shell, the visual module does not detect whether the direction position of the mobile phone shell is correct, and the shell suction head module cannot adjust the direction position of the mobile phone shell, so that the discharging of the mobile phone shell is not accurate enough, further leading to the problem of inaccurate laser welding. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a mobile phone shell laser welding machine according to the deficiencies of the prior art, which can position the mobile phone middle shell and press the mobile phone shell by using a welding jig, so that the mobile phone middle shell and the mobile phone shell will not displace during transmission and welding, and the welding precision of the mobile phone shell is high; the mobile phone shell feeding system of the laser welding machine has a feeding mechanical arm, a lifting mechanism, a rotating mechanism and a feeding mechanism, the feeding and discharging precision is high, the CCD visual detection device can be used to detect whether the direction position of the mobile phone shell is correct and adjust the direction position of the mobile phone shell through the rotating mechanism, so as to further improve the feeding precision and welding precision of the mobile phone shell; at the same time, the present application also provides a welding method of the mobile phone shell laser welding machine.

[0005] To solve the first technical problem, the technical scheme of the present application is: a mobile phone shell fragment laser welding machine, comprising a rack and a mobile phone shell conveying system, a flying feeder feeding assembly, a mobile phone shell fragment feeding system, a CCD visual detection device and a laser welding system installed on the rack; the mobile phone shell conveying system comprises a welding jig and a jig linear conveying module, the welding jig is installed on the jig linear conveying module, the welding jig comprises a shell positioning mechanism for positioning the mobile phone shell and a fragment pressing mechanism for pressing the mobile phone shell fragment, and the jig linear conveying module is used to move the welding jig to the working position of the mobile phone shell fragment feeding system and the laser welding system; the flying feeder feeding assembly is used to convey the mobile phone shell fragment to the working position of the mobile phone shell fragment feeding system; the mobile phone shell fragment feeding system is used to feed the mobile phone shell fragment conveyed by the flying feeder feeding assembly to the mobile phone shell in the welding jig, the mobile phone shell fragment feeding system comprises a feeding mechanical arm, a lifting mechanism is installed on the feeding mechanical arm, a rotating mechanism is arranged on the power output end of the lifting mechanism, and a material taking mechanism is arranged on the power output end of the rotating mechanism; the CCD visual detection device is installed below the mobile phone shell fragment feeding system and is used to visually detect the direction position of the mobile phone shell fragment taken out by the material taking mechanism; the laser welding system is used to laser weld the mobile phone shell in the welding jig and the mobile phone shell fragment together.

[0006] In the above technical scheme, the flying feeder feeding assembly comprises first and second flying feeder feeding assemblies arranged side by side, the mobile phone shell fragment feeding system comprises first and second mobile phone shell fragment feeding systems, the first mobile phone shell fragment feeding system is used to feed the mobile phone shell fragment conveyed by the first flying feeder feeding assembly to the mobile phone shell in the welding jig, and the second mobile phone shell fragment feeding system is used to feed the mobile phone shell fragment conveyed by the second flying feeder feeding assembly to the mobile phone shell in the welding jig; the CCD visual detection device comprises first and second CCD visual detection devices, the first CCD visual detection device is used to visually detect the direction position of the mobile phone shell fragment taken out by the material taking mechanism of the first mobile phone shell fragment feeding system, and the second CCD visual detection device is used to visually detect the direction position of the mobile phone shell fragment taken out by the material taking mechanism of the second mobile phone shell fragment feeding system; the mobile phone shell conveying system comprises first and second mobile phone shell conveying systems.

[0007] In the above technical solution, the welding fixture further includes a fixture base, a support column, a lifting cylinder, and an upper fixing plate. The support column and the lifting cylinder are respectively mounted on the fixture base, and the upper fixing plate is mounted on the support column. The middle shell positioning mechanism of the welding fixture includes a fixture base plate, on which a middle shell limiting part for positioning the middle shell of the mobile phone is provided. The piston rod of the lifting cylinder extends upward and connects to the fixture base plate to drive the fixture base plate to rise or fall. The upper fixing plate is positioned... Above the base plate of the fixture, the upper fixed plate has a central cavity that corresponds vertically to the limiting part of the mobile phone shell. The spring clip clamping mechanism of the welding fixture includes a rack, a gear, and a gear foot. The rack is vertically mounted on the base plate of the fixture, the gear is mounted on the side of the central cavity of the upper fixed plate, the rack meshes with the gear, one end of the gear foot is connected to the side of the gear, and the other end of the gear foot extends above the limiting part of the mobile phone shell to clamp or loosen the mobile phone spring clip on the mobile phone shell.

[0008] In the above technical solution, there are four support columns, which are vertically installed at the four corners of the fixture base, and the upper ends of the four support columns are connected to the four corners of the upper fixed plate. There are two lifting cylinders, which are installed in the middle of the fixture base. The piston rod of the lifting cylinder is provided with a floating joint at the connection between it and the fixture base plate. Several guide columns are vertically installed on the edge of the fixture base plate. The upper fixed plate is provided with several guide holes corresponding to the guide columns, and the guide columns are movably inserted into the corresponding guide holes. The middle cavity side of the upper fixed plate is provided with a notch, and the rack moves through the notch. The spring clamping mechanism of the welding fixture also includes a gear fixing block, a gear connecting shaft, and a bearing. The gear fixing block is connected to the side wall of the notch, one end of the gear connecting shaft is connected to the gear fixing block, the bearing is installed on the gear connecting shaft, and the gear is installed on the bearing.

[0009] In the above technical solution, the feeder feeding assembly includes a feeder feeder, a feeder slide, a feeder guide rail, a magnet, a feeder baffle, an adjusting screw, and an anti-collision rubber block. The feeder feeder is mounted on the feeder slide, the feeder slide is slidably mounted on the feeder guide rail, the magnet is mounted on one side of the feeder slide, the lower end of the feeder baffle is connected to the end of the feeder guide rail, the adjusting screw is mounted in the middle of the feeder baffle and magnetically attracted to the magnet, and the anti-collision rubber block is mounted on the upper end of the feeder baffle and abuts against one side of the feeder slide.

[0010] In the above technical solution, the mobile phone spring feeding system includes two square tube columns, the feeding robot arm includes a robot arm X-axis linear transmission module and a robot arm Z-axis linear transmission module, the robot arm X-axis linear transmission module is horizontally mounted on the two square tube columns, the robot arm Z-axis linear transmission module is vertically mounted on the robot arm X-axis linear transmission module, and the lifting mechanism is mounted on the robot arm Z-axis linear transmission module.

[0011] In the above technical solution, the lifting mechanism includes three lifting cylinders arranged in parallel, and the piston rod of each lifting cylinder extends downward and is connected to a motor mounting plate; the rotating mechanism includes three rotary motors, which are mounted on corresponding motor mounting plates, and the rotating shafts of the rotary motors pass downward through the motor mounting plates; the material picking mechanism includes three material picking suction cups, and the lower end of the rotating shaft of the rotary motor is connected to the corresponding material picking suction cup.

[0012] In the above technical solution, the CCD visual inspection device includes a visual inspection bracket, a CCD camera and a light source. The CCD camera is installed at the lower end of the visual inspection bracket and the light source is installed at the upper end of the visual inspection bracket.

[0013] In the above technical solution, the laser welding system includes a square tube gantry frame, an X-axis linear transmission module of the welding system, a Z-axis linear transmission module of the welding system, a laser generator, a laser galvanometer, and a vision positioning component. The X-axis linear transmission module of the welding system is horizontally mounted on the square tube gantry frame, and the Z-axis linear transmission module of the welding system is vertically mounted on the X-axis linear transmission module. The laser galvanometer and the vision positioning component are respectively mounted on the Z-axis linear transmission module of the welding system. The laser generator is mounted inside the frame, and the laser welder and the laser galvanometer are connected by an optical fiber.

[0014] To solve the second technical problem mentioned above, the technical solution of the present invention is: a welding method using the aforementioned mobile phone spring sheet laser welding machine, comprising the following welding steps:

[0015] S1. The fixture linear conveyor module drives the welding fixture to move to the loading position of the mobile phone mid-shell. The spring clip clamping mechanism of the welding fixture is released, and the mobile phone mid-shell is placed on the mid-shell positioning mechanism of the welding fixture by a robot or a human hand.

[0016] S2. The fixture linear conveyor module drives the welding fixture to move to the working position of the mobile phone spring sheet feeding system. At the same time, the feeder feeding component drives the mobile phone spring sheet material belt to move, so that the mobile phone spring sheets on the mobile phone spring sheet material belt are sequentially conveyed to the working position of the mobile phone spring sheet feeding system.

[0017] S3. The feeding robotic arm of the mobile phone spring sheet feeding system drives the lifting mechanism, rotating mechanism and picking mechanism to move to the feeding position of the feeder feeding component. The lifting mechanism drives the rotating mechanism and picking mechanism to descend. The picking mechanism takes out the mobile phone spring sheet from the mobile phone spring sheet material belt. The lifting mechanism then drives the rotating mechanism and picking mechanism to rise.

[0018] The S4.CCD vision inspection device detects the orientation and position of the mobile phone spring taken out by the material picking mechanism to determine whether the orientation and position of the mobile phone spring are correct. If the orientation and position of the mobile phone spring are incorrect, the rotating mechanism of the mobile phone spring feeding system drives the material picking mechanism to rotate, so that the orientation and position of the mobile phone spring are adjusted to be correct.

[0019] S5. The loading robotic arm of the mobile phone spring feeding system moves the lifting mechanism, rotating mechanism and picking mechanism to above the welding fixture. The lifting mechanism drives the rotating mechanism and picking mechanism to descend. The picking mechanism places the mobile phone spring on the set position on the middle shell of the mobile phone. After the mobile phone spring is placed, the lifting mechanism drives the rotating mechanism and picking mechanism to rise again.

[0020] S6. The spring clip clamping mechanism of the welding fixture clamps the mobile phone spring clip on the middle shell of the mobile phone;

[0021] S7. The fixture linear conveyor module drives the welding fixture to move to the working position of the laser welding system;

[0022] S8. The laser welding device laser welds the mobile phone casing and the mobile phone spring together in the welding fixture.

[0023] The beneficial effects of the present invention are: (1) Since the mobile phone shell conveying system of the present invention includes a welding fixture and a fixture linear conveying module, the welding fixture is installed on the fixture linear conveying module. The welding fixture includes a shell positioning mechanism for positioning the mobile phone shell and a spring pressing mechanism for pressing the mobile phone spring. Therefore, the present invention can use the welding fixture to position the mobile phone shell and press the mobile phone spring, so that the mobile phone shell and the mobile phone spring will not have displacement problems during transmission and welding, resulting in high welding accuracy of the mobile phone spring; (2) Since the mobile phone spring feeding system of the present invention includes a feeding robot arm, and a lifting mechanism is installed on the feeding robot arm, the lifting mechanism can be used to lift the mobile phone spring. The lifting mechanism has a rotating mechanism at its power output end, and the rotating mechanism has a material-picking mechanism at its power output end. Therefore, this invention can use a loading robotic arm to transport the lifting mechanism, rotating mechanism, and material-picking mechanism to a set position. Then, the lifting mechanism, rotating mechanism, and material-picking mechanism work together to pick up and release materials with high precision. At the same time, since the CCD vision inspection device is installed below the mobile phone spring sheet loading system, it can visually detect whether the orientation and position of the mobile phone spring sheet picked up by the material-picking mechanism are correct, and adjust the orientation and position of the mobile phone spring sheet by the rotating mechanism, further improving the loading and welding precision of the mobile phone spring sheet. Attached Figure Description

[0024] Figure 1 This is a structural diagram of a laser welding machine for mobile phone spring contacts.

[0025] Figure 2 One of the overall structural diagrams of a mobile phone spring-loaded laser welding machine after removing the outer cover and frame.

[0026] Figure 3 This is a 3D structural diagram of the mobile phone casing transmission system.

[0027] Figure 4 This is one of the three-dimensional structural diagrams of a welding fixture.

[0028] Figure 5 This is the second three-dimensional structural diagram of the welding fixture.

[0029] Figure 6 A three-dimensional structural diagram showing how the welding fixture positions the middle shell of the mobile phone and presses down the spring clips.

[0030] Figure 7 This is a diagram showing the distributed structure of the welding fixture.

[0031] Figure 8 This is a structural diagram of the combination of rack, gear, gear presser foot, gear retaining block, gear connecting shaft and bearing.

[0032] Figure 9 This is a 3D structural diagram of the feeder assembly.

[0033] Figure 10 for Figure 9 A magnified view of part A in the middle.

[0034] Figure 11 A three-dimensional structural diagram of a mobile phone spring feeding system and a CCD vision inspection device.

[0035] Figure 12 This is a three-dimensional structural diagram of a laser welding system. Detailed Implementation

[0036] The structural and working principles of the present invention will be further described in detail below with reference to the accompanying drawings.

[0037] like Figures 1-12As shown, this invention is a laser welding machine for mobile phone spring contacts, including a frame 1. The frame 1 includes a worktable 11, on which a mobile phone mid-shell conveying system 2, a feeder assembly 3, a mobile phone spring contact feeding system 4, a CCD vision inspection device 5, and a laser welding system 6 are mounted. An outer cover 7 is also mounted on the worktable 11, covering the mobile phone mid-shell conveying system 2, the feeder assembly 3, the mobile phone spring contact feeding system 4, the CCD vision inspection device 5, and the laser welding system 6. An input control device 71 is mounted on the outside of the outer cover 7. The mobile phone mid-shell conveying system 2 includes a welding fixture 21 and a fixture linear conveying module 22. The welding fixture 21 is mounted on the fixture linear conveying module 22. The welding fixture 21 includes a mid-shell positioning mechanism for positioning the mobile phone mid-shell 100 and a spring contact clamping mechanism for clamping the mobile phone spring contact 200. The fixture linear conveying module 22 is used to transfer the welding spring contact 200 to the worktable. The fixture 21 moves to the working position of the mobile phone spring sheet feeding system 4 and the laser welding system 6; the feeder assembly 3 is used to convey the mobile phone spring sheet 200 to the working position of the mobile phone spring sheet feeding system 4; the mobile phone spring sheet feeding system 4 is used to feed the mobile phone spring sheet 200 conveyed by the feeder assembly 3 onto the mobile phone shell 100 in the welding fixture 21; the mobile phone spring sheet feeding system 4 includes a feeding robotic arm 41, a lifting mechanism 42 is installed on the feeding robotic arm 41, a rotating mechanism 43 is provided at the power output end of the lifting mechanism 42, and a picking mechanism 44 is provided at the power output end of the rotating mechanism 43; the CCD vision inspection device 5 is installed below the mobile phone spring sheet feeding system 4 and is used to visually inspect the direction and position of the mobile phone spring sheet 200 taken out by the picking mechanism 44; the laser welding system 6 is used to laser weld the mobile phone shell 100 and the mobile phone spring sheet 200 together in the welding fixture 21.

[0038] The welding method of the mobile phone spring contact laser welding machine of the present invention includes the following welding steps:

[0039] S1. The fixture linear conveyor module 22 drives the welding fixture 21 to the loading position of the mobile phone middle shell 100. The spring clip clamping mechanism of the welding fixture 21 is released, and the mobile phone middle shell 100 is placed on the middle shell positioning mechanism of the welding fixture 21 by a robot or human hand.

[0040] S2. The fixture linear conveyor module 22 drives the welding fixture 21 to move to the working position of the mobile phone spring sheet feeding system 4. At the same time, the feeder feeding component 3 drives the mobile phone spring sheet 200 material strip to move, so that the mobile phone spring sheets 200 on the mobile phone spring sheet 200 material strip are sequentially conveyed to the working position of the mobile phone spring sheet feeding system 4.

[0041] S3. The feeding robotic arm 41 of the mobile phone spring sheet feeding system 4 drives the lifting mechanism 42, the rotating mechanism 43 and the picking mechanism 44 to move to the feeding position of the feeder feeding component 3. The lifting mechanism 42 drives the rotating mechanism 43 and the picking mechanism 44 to descend. The picking mechanism 44 takes out the mobile phone spring sheet 200 from the material strip of the mobile phone spring sheet 200. The lifting mechanism 42 then drives the rotating mechanism 43 and the picking mechanism 44 to rise.

[0042] S4. The CCD vision inspection device 5 detects the orientation and position of the mobile phone spring 200 taken out by the material picking mechanism 44 to determine whether the orientation and position of the mobile phone spring 200 is correct. If the orientation and position of the mobile phone spring 200 is incorrect, the rotating mechanism 43 of the mobile phone spring feeding system 4 drives the material picking mechanism 44 to rotate so that the orientation and position of the mobile phone spring 200 is adjusted to be correct.

[0043] S5. The loading robotic arm 41 of the mobile phone spring sheet loading system 4 drives the lifting mechanism 42, the rotating mechanism 43 and the picking mechanism 44 to move above the welding fixture 21. The lifting mechanism 42 drives the rotating mechanism 43 and the picking mechanism 44 to descend. The picking mechanism 44 places the mobile phone spring sheet 200 on the set position above the mobile phone middle shell 100. After the mobile phone spring sheet 200 is placed, the lifting mechanism 42 drives the rotating mechanism 43 and the picking mechanism 44 to rise.

[0044] S6. The spring clip clamping mechanism of the welding fixture 21 clamps the mobile phone spring clip 200 above the mobile phone middle shell 100;

[0045] S7. The fixture linear conveyor module 22 drives the welding fixture 21 to move to the working position of the laser welding system 6;

[0046] S8. The laser welding device laser welds the mobile phone casing 100 and the mobile phone spring 200 together in the welding fixture 21.

[0047] This invention utilizes a welding fixture 21 to position the mobile phone casing 100 and press the mobile phone spring 200, preventing displacement of the casing and spring during transmission and welding, thus achieving high welding precision for the spring. Furthermore, this invention uses a loading robotic arm to transport the lifting mechanism, rotating mechanism, and picking mechanism to a set position, and then achieves picking and unloading with high precision through the cooperation of these mechanisms. Finally, this invention can visually detect the correct orientation of the mobile phone spring picked up by the picking mechanism and adjust its orientation via the rotating mechanism, further improving the loading and welding precision of the mobile phone spring.

[0048] like Figure 1 , Figure 2 and Figure 9As shown, the feeder assembly 3 includes a first feeder assembly 301 and a second feeder assembly 302 arranged in parallel. The mobile phone spring sheet feeding system 4 includes a first mobile phone spring sheet feeding system 401 and a second mobile phone spring sheet feeding system 402. The first mobile phone spring sheet feeding system 401 is used to feed the mobile phone spring sheet 200 conveyed by the first feeder assembly 301 onto the mobile phone inner shell 100 in the welding fixture 21. The second mobile phone spring sheet feeding system 402 is used to feed the mobile phone spring sheet 200 conveyed by the second feeder assembly 302. The mobile phone shell 100 is fed into the welding fixture 21. The CCD vision inspection device 5 includes a first CCD vision inspection device 501 and a second CCD vision inspection device 502. The first CCD vision inspection device 501 is used to visually inspect the orientation and position of the mobile phone spring 200 taken out by the picking mechanism 44 of the first mobile phone spring feeding system 401, and the second CCD vision inspection device 502 is used to visually inspect the orientation and position of the mobile phone spring 200 taken out by the picking mechanism 44 of the second mobile phone spring feeding system 402. In this embodiment of the invention, there are two types of mobile phone springs 200. The first type of mobile phone spring 200 is conveyed by the first feeder assembly 301 and fed by the first mobile phone spring feeding system 401, and the second type of mobile phone spring 200 is conveyed by the second feeder assembly 301 and fed by the second mobile phone spring feeding system 402. This allows the two types of mobile phone springs 200 to be conveyed and fed separately, resulting in accurate feeding and high feeding efficiency.

[0049] like Figure 1 and Figure 2 As shown, the mobile phone casing conveying system 2 includes a first mobile phone casing conveying system 201 and a second mobile phone casing conveying system 202. When the mobile phone casing 100 and the mobile phone spring 200 on the first mobile phone casing conveying system 201 are undergoing laser welding, the operator can rotate the mobile phone casing 100 onto the second mobile phone casing conveying system 202 and load the mobile phone spring 200 through the second mobile phone spring loading system 402; in this way, the two sets of mobile phone casing conveying systems 2 alternately load and weld, which can double the welding efficiency.

[0050] like Figures 3-8As shown, the welding fixture 21 further includes a fixture base 211, a support column 212, a lifting cylinder 213, and an upper fixing plate 214. The support column 212 and the lifting cylinder 213 are respectively mounted on the fixture base 211, and the upper fixing plate 214 is mounted on the support column 212. The middle shell positioning mechanism of the welding fixture 21 includes a fixture base plate 215. A mobile phone middle shell limiting part 2151 for positioning the mobile phone middle shell 100 is provided on the fixture base plate 215. The cylinder piston rod of the lifting cylinder 213 extends upward and connects to the fixture base plate 215 to drive the fixture base plate 215 to rise or fall. The upper fixing plate 214 is located on the upper part of the fixture base plate 215. The upper fixing plate 214 has a central cavity 2141, which corresponds vertically to the mobile phone mid-shell limiting part 2151. The spring clip clamping mechanism of the welding fixture 21 includes a rack 216, a gear 217, and a gear foot 218. The rack 216 is vertically mounted on the fixture base plate 215. The gear 217 is mounted on the side of the central cavity 2141 of the upper fixing plate 214. The rack 216 meshes with the gear 217. One end of the gear foot 218 is connected to the side of the gear 217, and the other end of the gear foot 218 extends above the mobile phone mid-shell limiting part 2151 to clamp or release the mobile phone spring clip 200 on the mobile phone mid-shell 100. When the welding fixture 21 is not pressing the mobile phone spring 200, the piston rod of the lifting cylinder 213 is in a retracted state, and the gear presser foot 218 is in an upward-lifted state. When the mobile phone spring 200 is placed on the mobile phone shell 100, the piston rod of the lifting cylinder 213 rises, driving the fixture base plate 215 to rise. The fixture base plate 215 then drives the rack 216 to move upward, and the rack 216 then drives the gear 217 to rotate. Finally, the gear 217 drives the other end of the gear presser foot 218 to swing downward and press the mobile phone spring 200. The welding fixture 21 of the present invention can use the mobile phone shell limiting part 2151 of the fixture base plate 21 to position the mobile phone shell 100, and then use the gear presser foot 218 to press the mobile phone spring 200, resulting in high positioning stability of the mobile phone shell 100 and the mobile phone spring 200.

[0051] like Figures 3-8 As shown, there are four support columns 212, which are vertically installed at the four corners of the fixture base 211. The upper ends of the four support columns 212 are connected to the four corners of the upper fixed plate 214. There are two lifting cylinders 213, which are installed in the middle of the fixture base 211. The piston rod of the lifting cylinder 213 is provided with a floating joint 2131 at the connection between it and the fixture base plate 215. This improves the installation stability of the upper fixed plate 214 and the lifting stability of the fixture base plate 21.

[0052] like Figures 3-8As shown, the base plate 215 of the fixture is provided with several mobile phone shell limiting blocks 2152 and several mobile phone shell positioning pins 2153 on the mobile phone shell limiting part 2151, which can further improve the positioning stability of the mobile phone shell 100.

[0053] like Figures 3-8 As shown, several guide posts 209 are vertically installed on the edge of the fixture base plate 215. The upper fixing plate 214 is provided with several guide holes 2142 corresponding to the guide posts 209. The guide posts 209 are movably inserted into the corresponding guide holes 2142, which can improve the lifting stability of the fixture base plate 215.

[0054] like Figures 3-8 As shown, the upper fixing plate 214 has a notch 2143 on the side of the cavity 2141, through which the rack 216 moves. The spring clip clamping mechanism of the welding fixture 21 also includes a gear fixing block 2171, a gear connecting shaft 2172, and a bearing 2173. The gear fixing block 2171 is connected to the side wall of the notch 2143, one end of the gear connecting shaft 2172 is connected to the gear fixing block 2171, the bearing 2173 is mounted on the gear connecting shaft 2172, and the gear 217 is mounted on the bearing 2173. Five sets of rack 216, gear 217, gear clamping foot 218, notch 2143, gear fixing block 2171, gear connecting shaft 2172, and bearing 2173 are provided. In this embodiment of the invention, the mobile phone inner shell 100 requires welding five mobile phone spring clips 200, each of which is individually clamped by a gear clamping foot 218.

[0055] like Figure 2 , Figure 9 and Figure 10 As shown, the feeder feeding assembly 3 includes a feeder feeder 31, a feeder slide 32, a feeder guide rail 33, a magnet 34, a feeder baffle 35, an adjusting screw 36, and an anti-collision rubber block 37. The feeder feeder 31 is mounted on the feeder slide 32, and the feeder slide 32 is slidably mounted on the feeder guide rail 33. The magnet 34 is mounted on one side of the feeder slide 32. The lower end of the feeder baffle 35 is connected to the end of the feeder guide rail 33. The adjusting screw 36 is mounted in the middle of the feeder baffle 35 and is magnetically attracted to the magnet 34. The anti-collision rubber block 37 is mounted on the upper end of the feeder baffle 35 and abuts against one side of the feeder slide 32. By setting the feeder slide 32 and feeder guide rail 33, the feeder feeder 31 can be easily moved out or in from the laser welding machine to replace the new mobile phone spring roll; by setting the magnet 34 and adjusting screw 36, the feeder slide 32 can be magnetically attracted and positioned by the magnet, and the position of the feeder feeder 31 can be finely adjusted by adjusting the screw.

[0056] like Figure 1 , Figure 2 and Figure 11 As shown, the mobile phone spring feeding system 4 includes two square tube columns 45, and the feeding robotic arm 41 includes a robotic arm X-axis linear transmission module 411 and a robotic arm Z-axis linear transmission module 412. The robotic arm X-axis linear transmission module 411 is horizontally mounted on the two square tube columns 45, and the robotic arm Z-axis linear transmission module 415 is vertically mounted on the robotic arm X-axis linear transmission module 411. The lifting mechanism 42 is mounted on the robotic arm Z-axis linear transmission module 412.

[0057] like Figure 1 , Figure 2 and Figure 11 As shown, the lifting mechanism 42 includes three parallel lifting cylinders, each with a piston rod extending downwards and connected to a motor mounting plate; the rotating mechanism 43 includes three rotary motors, each mounted on a corresponding motor mounting plate, with its shaft passing downwards through the mounting plate; the material-picking mechanism 44 includes three material-picking suction cups, with the lower end of the rotary motor's shaft connected to the corresponding suction cup. The combination of three lifting cylinders, three rotating mechanisms, and three suction cups enables the invention to simultaneously pick up and load three mobile phone spring clips.

[0058] like Figure 1 , Figure 2 and Figure 11 As shown, the CCD visual inspection device 5 includes a visual inspection bracket 51, a CCD camera 52, and a light source 53. The CCD camera 52 is installed at the lower end of the visual inspection bracket 51, and the light source 53 is installed at the upper end of the visual inspection bracket 51.

[0059] like Figure 1 , Figure 2 and Figure 12 As shown, the laser welding system 6 includes a square tube gantry frame 61, a welding system X-axis linear transmission module 62, a welding system Z-axis linear transmission module 63, a laser generator, a laser galvanometer 65, and a vision positioning component 66. The welding system X-axis linear transmission module 62 is horizontally mounted on the square tube gantry frame 61, and the welding system Z-axis linear transmission module 63 is vertically mounted on the welding system X-axis linear transmission module 62. The laser galvanometer 65 and the vision positioning component 66 are respectively mounted on the welding system Z-axis linear transmission module 62. The laser generator is mounted inside the frame 1, and the laser welder is connected to the laser galvanometer 65 via an optical fiber.

[0060] The above description is merely a preferred embodiment of the present invention. Any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical solution of the present invention shall fall within the scope of the technical solution of the present invention.

Claims

1. A laser welding machine for mobile phone spring contacts, characterized in that: The system includes a frame and a mobile phone casing conveying system, a feeder assembly, a mobile phone spring sheet feeding system, a CCD vision inspection device, and a laser welding system mounted on the frame. The mobile phone casing conveying system includes a welding fixture and a fixture linear conveying module. The welding fixture is mounted on the fixture linear conveying module and includes a casing positioning mechanism for positioning the mobile phone casing and a spring sheet clamping mechanism for clamping the mobile phone spring sheet. The fixture linear conveying module moves the welding fixture to the working position of the mobile phone spring sheet feeding system and the laser welding system. The feeder assembly conveys the mobile phone spring sheet to the mobile phone spring sheet feeding system. The working position of the wafer feeding system; the mobile phone wafer feeding system is used to feed the mobile phone wafers conveyed by the feeder assembly onto the mobile phone shell in the welding fixture. The mobile phone wafer feeding system includes a feeding robot arm, on which a lifting mechanism is installed. The power output end of the lifting mechanism is equipped with a rotating mechanism, and the power output end of the rotating mechanism is equipped with a picking mechanism. The CCD vision inspection device is installed below the mobile phone wafer feeding system and is used to visually inspect the orientation and position of the mobile phone wafers picked up by the picking mechanism. The laser welding system is used to laser weld the mobile phone shell and the mobile phone wafers in the welding fixture together. The feeder feeding assembly includes a first feeder feeding assembly and a second feeder feeding assembly arranged side by side; The welding fixture further includes a fixture base, a support column, a lifting cylinder, and an upper fixing plate. The support column and the lifting cylinder are respectively mounted on the fixture base, and the upper fixing plate is mounted on the support column. The middle shell positioning mechanism of the welding fixture includes a fixture base plate, on which a middle shell limiting part for positioning the middle shell of the mobile phone is provided. The piston rod of the lifting cylinder extends upward and connects to the fixture base plate to drive the fixture base plate to rise or fall. The upper fixing plate is located above the fixture base plate and has a central cavity that corresponds vertically to the middle shell limiting part of the mobile phone. The spring clip clamping mechanism of the welding fixture includes a rack, a gear, and a gear foot. The rack is vertically mounted on the fixture base plate, the gear is mounted on the side of the central cavity of the upper fixing plate, and the rack meshes with the gear. One end of the gear foot is connected to the side of the gear, and the other end of the gear foot extends upward toward the middle shell limiting part of the mobile phone to clamp or release the spring clip on the middle shell of the mobile phone. The upper fixing plate has a notch on the side of the cavity, through which the rack moves; the spring clamping mechanism of the welding fixture also includes a gear fixing block, a gear connecting shaft and a bearing, the gear fixing block is connected to the side wall of the notch, one end of the gear connecting shaft is connected to the gear fixing block, the bearing is mounted on the gear connecting shaft and the gear is mounted on the bearing.

2. The mobile phone spring sheet laser welding machine according to claim 1, characterized in that: The mobile phone spring feeding system includes a first mobile phone spring feeding system and a second mobile phone spring feeding system. The first mobile phone spring feeding system is used to feed the mobile phone springs conveyed by the first feeder component onto the mobile phone mid-shell in the welding fixture. The second mobile phone spring feeding system is used to feed the mobile phone springs conveyed by the second feeder component onto the mobile phone mid-shell in the welding fixture. The CCD vision inspection device includes a first CCD vision inspection device and a second CCD vision inspection device. The first CCD vision inspection device is used to visually inspect the orientation and position of the mobile phone springs taken out by the picking mechanism of the first mobile phone spring feeding system. The second CCD vision inspection device is used to visually inspect the orientation and position of the mobile phone springs taken out by the picking mechanism of the second mobile phone spring feeding system. The mobile phone mid-shell conveying system includes a first mobile phone mid-shell conveying system and a second mobile phone mid-shell conveying system.

3. The mobile phone spring sheet laser welding machine according to claim 1, characterized in that: The number of support columns is four, which are vertically installed at the four corners of the fixture base, and the upper ends of the four support columns are connected to the four corners of the upper fixed plate respectively; the number of lifting cylinders is two, which are installed on the middle of the fixture base, and the piston rod of the lifting cylinder is provided with a floating joint at the connection between it and the fixture base plate; several guide columns are vertically installed on the edge of the fixture base plate, and the upper fixed plate is provided with several guide holes corresponding to the guide columns, and the guide columns are movably inserted into the corresponding guide holes.

4. The mobile phone spring sheet laser welding machine according to claim 1, characterized in that: The feeder assembly includes a feeder feeder, a feeder slide, a feeder guide rail, a magnet, a feeder baffle, an adjusting screw, and an anti-collision rubber block. The feeder feeder is mounted on the feeder slide, which is slidably mounted on the feeder guide rail. The magnet is mounted on one side of the feeder slide. The lower end of the feeder baffle is connected to the end of the feeder guide rail. The adjusting screw is mounted in the middle of the feeder baffle and magnetically engages with the magnet. The anti-collision rubber block is mounted on the upper end of the feeder baffle and abuts against one side of the feeder slide.

5. The mobile phone spring sheet laser welding machine according to claim 1, characterized in that: The mobile phone spring feeding system includes two square tube columns. The feeding robot arm includes an X-axis linear transmission module and a Z-axis linear transmission module. The X-axis linear transmission module is horizontally mounted on the two square tube columns, and the Z-axis linear transmission module is vertically mounted on the X-axis linear transmission module. The lifting mechanism is mounted on the Z-axis linear transmission module.

6. The mobile phone spring sheet laser welding machine according to claim 1, characterized in that: The lifting mechanism includes three lifting cylinders arranged in parallel, with the piston rod of each lifting cylinder extending downward and connected to a motor mounting plate; the rotating mechanism includes three rotary motors, each mounted on a corresponding motor mounting plate, with the rotating shaft of the rotary motor passing downward through the motor mounting plate; the material picking mechanism includes three material picking suction cups, with the lower end of the rotating shaft of each rotary motor connected to the corresponding material picking suction cup.

7. The mobile phone spring sheet laser welding machine according to claim 1, characterized in that: The CCD visual inspection device includes a visual inspection bracket, a CCD camera, and a light source. The CCD camera is installed at the lower end of the visual inspection bracket, and the light source is installed at the upper end of the visual inspection bracket.

8. The mobile phone spring sheet laser welding machine according to claim 1, characterized in that: The laser welding system includes a square tube gantry frame, an X-axis linear drive module, a Z-axis linear drive module, a laser generator, a laser galvanometer, and a vision positioning component. The X-axis linear drive module is horizontally mounted on the square tube gantry frame, and the Z-axis linear drive module is vertically mounted on top of the X-axis linear drive module. The laser galvanometer and vision positioning component are respectively mounted on the Z-axis linear drive module. The laser generator is installed inside the frame, and the laser welder is connected to the laser galvanometer via an optical fiber.

9. A welding method using the laser welding machine for mobile phone spring contacts as described in any one of claims 1-8, characterized in that, The welding steps include the following: S1. The fixture linear conveyor module drives the welding fixture to move to the loading position of the mobile phone mid-shell. The spring clip clamping mechanism of the welding fixture is released, and the mobile phone mid-shell is placed on the mid-shell positioning mechanism of the welding fixture by a robot or a human hand. S2. The fixture linear conveyor module drives the welding fixture to move to the working position of the mobile phone spring sheet feeding system. At the same time, the feeder feeding component drives the mobile phone spring sheet material belt to move, so that the mobile phone spring sheets on the mobile phone spring sheet material belt are sequentially conveyed to the working position of the mobile phone spring sheet feeding system. S3. The feeding robotic arm of the mobile phone spring sheet feeding system drives the lifting mechanism, rotating mechanism and picking mechanism to move to the feeding position of the feeder feeding component. The lifting mechanism drives the rotating mechanism and picking mechanism to descend. The picking mechanism takes out the mobile phone spring sheet from the mobile phone spring sheet material belt. The lifting mechanism then drives the rotating mechanism and picking mechanism to rise. The S4.CCD vision inspection device detects the orientation and position of the mobile phone spring taken out by the material picking mechanism to determine whether the orientation and position of the mobile phone spring are correct. If the orientation and position of the mobile phone spring are incorrect, the rotating mechanism of the mobile phone spring feeding system drives the material picking mechanism to rotate, so that the orientation and position of the mobile phone spring are adjusted to be correct. S5. The loading robotic arm of the mobile phone spring feeding system moves the lifting mechanism, rotating mechanism and picking mechanism to above the welding fixture. The lifting mechanism drives the rotating mechanism and picking mechanism to descend. The picking mechanism places the mobile phone spring on the set position on the middle shell of the mobile phone. After the mobile phone spring is placed, the lifting mechanism drives the rotating mechanism and picking mechanism to rise again. S6. The spring clip clamping mechanism of the welding fixture clamps the mobile phone spring clip on the middle shell of the mobile phone; S7. The fixture linear conveyor module drives the welding fixture to move to the working position of the laser welding system; S8. The laser welding device laser welds the mobile phone casing and the mobile phone spring together in the welding fixture.

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