Laser solder ball welding machine

Abstract

The present invention provides a laser solder ball welding machine, comprising a supporting platform, a moving mechanism, a laser welding mechanism, a first visual system and a product placement table. The laser welding mechanism comprises a shell, a welding disk assembly, a welding nozzle, a first sliding mechanism, a first PZT driving mechanism and a laser emitter. The shell is connected to the moving mechanism, the welding disk assembly is installed in the shell, the welding disk assembly is provided with a laser channel, the welding nozzle is arranged at the bottom of the welding disk assembly and protrudes out of the shell, the first sliding mechanism is slidably and adjustably arranged on the upper part of the welding disk assembly, the first PZT driving mechanism comprises a first power supply assembly and a first piezoelectric ceramic, the first power supply assembly is connected to the first piezoelectric ceramic, the first piezoelectric ceramic is connected to the first sliding mechanism, the laser emitter is arranged on the first sliding mechanism and is located above the laser channel, the first piezoelectric ceramic is energized by the first power supply assembly, so that the first piezoelectric ceramic drives the first sliding mechanism to slide together with the laser emitter.

Description

Technical Field

[0001] The invention relates to the field of solder ball welding, and in particular to a laser solder ball welding machine. Background Art

[0002] At present, soldering is very popular in industrial production. With the development of technology and the rapid increase in labor costs, automatic soldering equipment for solder balls has replaced the traditional manually operated soldering method of electric soldering irons and become the main direction of soldering technology development. Laser solder ball welding uses a high-energy-density laser beam as a heat source to irradiate the solder ball located in the soldering nozzle in the tin tray, so that the solder ball melts quickly, and then removes the laser irradiation to solidify the melted solder ball, thereby completing the welding. In order to melt the solder ball, the laser beam needs to be directly above the solder ball. If there is a deviation between the laser beam and the solder ball, the laser beam does not hit the solder ball, and the solder ball cannot be melted, resulting in failure to weld. In existing laser solder ball welding equipment, the fine-tuning screw of the XY sliding platform is generally manually adjusted to adjust the position of the laser emitter so that the laser beam emitted by the laser emitter is aligned with the solder ball, thereby melting the solder ball. However, this method has the following problems: First, the manual fine-tuning has low centering adjustment accuracy, troublesome operation, and high labor costs; Second, there is a situation where the solder ball does not fall into the welding channel effectively but is taken away by the disc, and the ball remains in the ball distribution hole of the disc, causing the solder ball to rub against the substrate and the bottom plate. The friction increases the torque and even jams the disc, causing the disc to be unable to continue to rotate. The worn solder ball will produce solder slag, causing pollution, and even the incomplete solder ball will be sent to the working ball position for welding again, resulting in defective welding products and affecting production efficiency.

[0003] Therefore, there is an urgent need for a laser solder ball welding machine that can automatically adjust the laser centering and automatically weld. Summary of the invention

[0004] The object of the present invention is to provide a laser solder ball welding machine which can automatically adjust laser centering and perform automatic welding.

[0005] To achieve the above-mentioned purpose, the present invention provides a laser solder ball welding machine, including a supporting platform, a moving mechanism, a laser welding mechanism, a first visual system and a product placement table, wherein the moving mechanism is arranged on the supporting platform; the laser welding mechanism includes a shell, a welding disk assembly, a welding nozzle, a first sliding mechanism, a first PZT driving mechanism and a laser emitter, the shell is connected to the moving mechanism, the moving mechanism can drive the shell to move, the welding disk assembly is installed in the shell, the welding disk assembly is provided with a laser channel, the welding nozzle is arranged at the bottom of the welding disk assembly and protrudes out of the shell, the welding nozzle is provided with a welding channel, the welding channel is connected to the laser channel, and the first sliding mechanism is slidably and adjustably arranged on the shell. At the upper part of the welding disk assembly, the first PZT driving mechanism includes a first power supply assembly and a first piezoelectric ceramic, the first power supply assembly is connected to the first piezoelectric ceramic, the first piezoelectric ceramic is connected to the first sliding mechanism, the laser emitter is arranged on the first sliding mechanism and is located above the laser channel, the first power supply assembly is energized to the first piezoelectric ceramic so that the first piezoelectric ceramic drives the first sliding mechanism together with the laser emitter to slide; the first visual system is arranged on the supporting platform, the first visual system is used to observe the light spot of the laser emitted by the laser emitter and the center position of the welding nozzle; the product placement table is arranged on the supporting platform and is used to place the products to be welded.

[0006] Preferably, the moving mechanism includes an X-axis moving component, a Y-axis moving component and a Z-axis moving component, the X-axis moving component is arranged on the supporting platform, the Y-axis moving component is vertically arranged on the X-axis moving component, the Z-axis moving component is vertically arranged on the Y-axis moving component, and the shell is arranged on the Z-axis moving component.

[0007] Preferably, the first sliding mechanism includes a first seat body and a first sliding member, the first seat body is arranged on the welding disk assembly, the first sliding member can be slidably arranged on the first seat body, the first piezoelectric ceramic is arranged on the first seat body and is abutted and connected with the first sliding member, and the laser emitter is connected to the first sliding member.

[0008] Preferably, the first PZT driving mechanism also includes a first amplifier, a middle part of which is pivotally connected to the first seat, the first amplifier is located between the first piezoelectric ceramic and the first sliding member, the first piezoelectric ceramic is abutted against one end of the first amplifier, and the other end of the first amplifier is abutted against the first sliding member, and the force arm of the first piezoelectric ceramic acting on the first amplifier is shorter than the force arm of the first sliding member acting on the first amplifier.

[0009] Preferably, the laser welding mechanism also includes a second sliding mechanism and a second PZT driving mechanism, the second sliding mechanism is slidably and adjustably arranged on the upper part of the welding disk assembly, the first sliding mechanism is arranged on the second sliding mechanism, and the second PZT driving mechanism includes a second power supply component and a second piezoelectric ceramic, the second power supply component is connected to the second piezoelectric ceramic, and the second piezoelectric ceramic is connected to the second sliding mechanism, and the second piezoelectric ceramic is energized by the second power supply component so that the second piezoelectric ceramic drives the second sliding mechanism to slide.

[0010] Preferably, the second sliding mechanism includes a second seat body and a second sliding member, the second seat body is arranged on the welding disk assembly, the second sliding member can be slidably arranged on the second seat body, the second piezoelectric ceramic is arranged on the second seat body and is abutted and connected with the second sliding member, and the first sliding mechanism is arranged on the second sliding member.

[0011] Preferably, the second PZT driving mechanism also includes a second amplifier, the middle part of the second amplifier is pivotally connected to the second seat, the second amplifier is located between the second piezoelectric ceramic and the second sliding member, the second piezoelectric ceramic is abutted against one end of the second amplifier, and the other end of the second amplifier is abutted against the second sliding member, and the force arm of the second piezoelectric ceramic acting on the second amplifier is shorter than the force arm between the left and right sides of the second sliding member and the second amplifier.

[0012] Preferably, the welding disk assembly includes a lower substrate, a ball dividing disc, an upper substrate and a rotation drive mechanism, the lower substrate, the ball dividing disc and the upper substrate are stacked in sequence from bottom to top, the laser channel runs through the lower substrate and the upper substrate, the welding nozzle is installed at the bottom of the lower substrate, the lower substrate is provided with a blanking channel and a slag discharge notch, one end of the blanking channel forms a blanking port on the upper surface of the lower substrate, the other end of the blanking channel is connected to the laser channel, and the slag discharge notch is located on the upper surface of the lower substrate. The ball dividing disc is provided with a plurality of ball dividing holes along the circumferential direction, the upper substrate is provided with a feed channel, and the feed channel forms a feed outlet on the lower surface of the upper substrate, the drop port, the slag discharge slot and the feed outlet are respectively opposite to the circumferential line where the ball dividing holes are located, the output end of the rotation driving mechanism passes through the upper substrate and is connected to the ball dividing disc, and the ball dividing disc is driven to rotate by the rotation driving mechanism, so that the solder balls in the ball dividing holes that have not fallen into the drop port fall into the slag discharge slot.

[0013] Preferably, it further includes a second visual system, which is connected to the shell and is used to take pictures and locate the product on the product placement table.

[0014] Preferably, a solder ball collection box is further included, and the solder ball collection box is arranged on the supporting platform and is used to collect solder balls.

[0015] Compared with the prior art, the laser welding mechanism of the laser solder ball welding machine of the present invention is provided with a first visual system, a first sliding mechanism and a first PZT driving mechanism. The first visual system is used to observe and analyze the spot of the laser emitted by the laser emitter and the center position of the welding nozzle. According to the analysis result, the first power supply component is used to energize the first piezoelectric ceramic, so that the first piezoelectric ceramic converts the electrical signal into mechanical displacement and drives the first sliding mechanism to slide, so that the first sliding mechanism drives the laser emitter to slide together, and then the position of the laser beam emitted by the laser emitter is fine-tuned, so that the laser beam and the welding nozzle are accurately aligned, and automatic adjustment of the laser alignment is realized, ensuring that the laser beam can be shot onto the solder ball and melt the solder ball; the laser solder ball welding machine of the present invention can drive the laser welding mechanism to move through the moving mechanism, so that the welding nozzle of the laser welding mechanism moves to the position corresponding to the product to be welded, so as to realize automatic welding of the product with high welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the laser solder ball welding machine of the present invention.

[0017] Figure 2 It is a structural schematic diagram of the laser solder ball welding machine of the present invention with the frame removed.

[0018] Figure 3 It is a structural schematic diagram of the laser welding mechanism of the laser solder ball welding machine of the present invention.

[0019] Figure 4 It is a structural schematic diagram of a welding disk assembly of the laser welding mechanism of the present invention.

[0020] Figure 5 It is an exploded view of the welding disk assembly of the laser welding mechanism of the present invention.

[0021] Figure 6 It is a cross-sectional view of a welding plate assembly of the laser welding mechanism of the present invention.

[0022] Figure 7 yes Figure 6 Enlarged view of point A in the middle.

[0023] Figure 8 It is a structural schematic diagram of the ball-dividing disc of the laser welding mechanism of the present invention.

[0024] Fig. 9 It is another cross-sectional view of the welding disk assembly of the laser welding mechanism of the present invention.

[0025] Fig.10 yes Fig. 9 Enlarged view of point B in the middle.

[0026] Fig.11 It is a schematic structural diagram of the laser welding mechanism of the present invention without the shell.

[0027] Fig.12 It is a principle block diagram of the first PZT driving mechanism of the present invention.

[0028] Fig.13 It is a principle block diagram of the second PZT driving mechanism of the present invention.

[0029] Fig.14 It is a structural schematic diagram of the first visual system, the product placement table and the solder ball collection box of the present invention. DETAILED DESCRIPTION

[0030] In order to explain the technical content and structural features of the present invention in detail, further description will be given below in combination with the implementation modes and the accompanying drawings.

[0031] See also Figures 1 to 3 as well as Figure 11 to Figure 12The laser solder ball welding machine 100 of the present invention includes a frame 101, a support platform 1, a moving mechanism 2, a laser welding mechanism 3, a first visual system 4 and a product placement table 5. The support platform 1 is arranged in the frame 101; the moving mechanism 2 is arranged on the support platform 1; the laser welding mechanism 3 includes a housing 31, a welding plate assembly 32, a welding nozzle 33, a first sliding mechanism 34, and a first PZT driving mechanism 35 (PZT, Piezoelectric The shell 31 is connected to the moving mechanism 2, and the moving mechanism 2 can drive the shell 31 to move. The welding disk assembly 32 is installed in the shell 31. The welding disk assembly 32 is provided with a laser channel 321. The welding nozzle 33 is arranged at the bottom of the welding disk assembly 32 and protrudes out of the shell 31. The welding nozzle 33 is provided with a welding channel 331. The upper end of the welding channel 331 is connected to the laser channel 321, and the lower end of the welding channel 331 forms a solder ball welding outlet. The first sliding mechanism 34 is slidably and adjustably arranged on the upper part of the welding disk assembly 32. The first PZT driving mechanism 35 includes a first power supply assembly 351 and The first piezoelectric ceramic 352, the first power supply component 351 is connected to the first piezoelectric ceramic 352, the first piezoelectric ceramic 352 is connected to the first sliding mechanism 34, the laser emitter 36 is arranged on the first sliding mechanism 34 and is located above the laser channel 321, and the first piezoelectric ceramic 352 is energized by the first power supply component 351, so that the first piezoelectric ceramic 352 drives the first sliding mechanism 34 and the laser emitter 36 to slide together; the first visual system 4 is arranged on the support platform 1, and the first visual system 4 is used to observe the laser spot and the center position of the welding nozzle 33; the product placement table 5 is arranged on the support platform 1 and is used to place the product to be welded. Among them, the first visual system 4 can adopt the existing CCD visual system, etc.

[0032] See also Figure 1 and Figure 3 , the first visual system 4 is used to observe and analyze the laser spot and the center position of the welding nozzle 33. According to the analysis result, the first power supply component 351 is used to energize the first piezoelectric ceramic 352, so that the first piezoelectric ceramic 352 converts the electrical signal into mechanical displacement and drives the first sliding mechanism 34 to slide, so that the first sliding mechanism 34 drives the laser emitter 36 to slide together, and then the position of the laser beam emitted by the laser emitter 36 is finely adjusted, so that the laser beam and the welding nozzle 33 are accurately aligned, and the laser alignment is automatically adjusted to ensure that the laser beam can be shot onto the solder ball and melt the solder ball. The laser welding mechanism 3 can be driven to move by the moving mechanism 2, so that the welding nozzle 33 of the laser welding mechanism 3 moves to the position corresponding to the welded product, and the product is automatically welded. Specifically, the frame 101 is provided with a display operation mechanism 8, a controller, etc.

[0033] See also Figure 2In this embodiment, the moving mechanism 2 includes an X-axis moving assembly 21, a Y-axis moving assembly 22 and a Z-axis moving assembly 23. The X-axis moving assembly 21 is arranged on the supporting platform 1, the Y-axis moving assembly 22 is arranged vertically on the X-axis moving assembly 21, the Z-axis moving assembly 23 is arranged vertically on the Y-axis moving assembly 22, and the housing 31 is arranged on the Z-axis moving assembly 23. The laser welding mechanism 3 is driven to move in a three-dimensional space by the X-axis moving assembly 21, the Y-axis moving assembly 22 and the Z-axis moving assembly 23, so as to weld the products on the product placement table 5. Among them, the X-axis moving assembly 21, the Y-axis moving assembly 22 and the Z-axis moving assembly 23 form an existing three-axis manipulator mechanism, but the structure of the moving mechanism 2 is not limited thereto, and the moving mechanism 2 can also adopt an existing four-axis manipulator, a six-axis manipulator, etc.

[0034] See also Fig.11 and Fig.12The first sliding mechanism 34 includes a first seat body 341 and a first sliding member 342. The first seat body 341 is disposed on the welding plate assembly 32. The first sliding member 342 is slidably disposed on the first seat body 341. The first piezoelectric ceramic 352 is disposed on the first seat body 341 and is in contact with the first sliding member 342. The laser emitter 36 is connected to the first sliding member 342. The first power supply assembly 351 can be disposed in the first seat body 341, but is not limited thereto. The first power supply assembly 351 can also be external. Preferably, the first PZT driving mechanism 35 also includes a first amplifier 353, the middle part of the first amplifier 353 is pivotally connected to the first base body 341, the first amplifier 353 is located between the first piezoelectric ceramic 352 and the first sliding member 342, the first piezoelectric ceramic 352 is abutted against one end of the first amplifier 353, and the other end of the first amplifier 353 is abutted against the first sliding member 342, and the force arm of the first piezoelectric ceramic 352 acting on the first amplifier 353 is shorter than the force arm of the first sliding member 342 acting on the first amplifier 353. In this embodiment, the first sliding member 342 always has a reset force for sliding back to the initial position, the first amplifier 353 and the first piezoelectric ceramic 352 play a blocking role in the first sliding member 342 being reset to the initial position, the first power supply assembly 351 energizes the first piezoelectric ceramic 352, so that the first piezoelectric ceramic 352 pushes the first amplifier 353 to rotate, and the first amplifier 353 releases the first sliding member 342, and the first sliding member 342 slides along the first seat 341 under the action of the reset force, and drives the laser emitter 36 to slide together, thereby fine-tuning the position of the laser emitter 36. The method of the first sliding member 342 always having a reset force for sliding back to the initial position can adopt an existing tension spring, which is arranged between the first seat 341 and the first sliding member 342, and the tension spring is in a stretched state, thereby applying a reset force for sliding back to the initial position to the first sliding member 342, but is not limited thereto. It is worth noting that in other embodiments, the first piezoelectric ceramic 352 can be energized through the first power supply assembly 351, so that the first piezoelectric ceramic 352 pushes the first amplifier 353 to rotate, and the rotation of the first amplifier 353 directly pushes the first sliding member 342 to slide, so that the first sliding member 342 drives the laser emitter 36 to slide together. Among them, the first amplifier 353 can protect the first piezoelectric ceramic 352 from off-axis force (lateral force and torque) while increasing the stroke.

[0035] See also Figures 11 to 13The laser welding mechanism 3 further includes a second sliding mechanism 37 and a second PZT driving mechanism 38. The second sliding mechanism 37 is slidably and adjustably arranged on the upper part of the welding disk assembly 32. The first sliding mechanism 34 is arranged on the second sliding mechanism 37. The second PZT driving mechanism 38 includes a second power supply component 381 and a second piezoelectric ceramic 382. The second power supply component 381 is connected to the second piezoelectric ceramic 382. The second piezoelectric ceramic 382 is connected to the second sliding mechanism 37. The second power supply component 381 is used to energize the second piezoelectric ceramic 382 so that the second piezoelectric ceramic 382 drives the second sliding mechanism 37 to slide. Specifically, the second sliding mechanism 37 includes a second seat body 371 and a second sliding member 372. The second seat body 371 is arranged on the welding disk assembly 32. The second sliding member 372 is slidably arranged on the second seat body 371. The second piezoelectric ceramic 382 is arranged on the second seat body 371 and is in contact with the second sliding member 372. The first sliding mechanism 34 is arranged on the second sliding member 372. The second power supply assembly 381 can be disposed in the second seat body 371, but is not limited thereto, and the second power supply assembly 381 can also be external. Preferably, the second PZT driving mechanism 38 also includes a second amplifier 383, the middle portion of the second amplifier 383 is pivotally connected to the second seat body 371, the second amplifier 383 is located between the second piezoelectric ceramic 382 and the second sliding member 372, the second piezoelectric ceramic 382 is in contact with one end of the second amplifier 383, and the other end of the second amplifier 383 is in contact with the second sliding member 372, and the force arm of the second piezoelectric ceramic 382 acting on the second amplifier 383 is shorter than the force arm of the left and right sides of the second sliding member 372 and the second amplifier 383. In this embodiment, the second sliding member 372 always has a reset force to slide back to the initial position, and the second amplifier 383 and the second piezoelectric ceramic 382 play a blocking role in resetting the second sliding member 372 to the initial position. The second piezoelectric ceramic 382 is energized by the second power supply assembly 381, so that the second piezoelectric ceramic 382 pushes the second amplifier 383, and the second amplifier 383 rotates to release the second sliding member 372. The second sliding member 372 slides along the second seat body 371 under the action of the reset force, and drives the first sliding mechanism 34 to slide. More specifically, the sliding direction of the first sliding member 342 is perpendicular to the sliding direction of the second sliding member 372. The first sliding mechanism 34 and the second sliding mechanism 37 can adopt the existing XY sliding platform method, but are not limited to this. The second amplifier 383 can protect the second piezoelectric ceramic 382 from off-axis force (lateral force and torque) while increasing the stroke.

[0036] See also Figures 4 to 8The welding disk assembly 32 includes a lower substrate 322, a ball-dividing disc 323, an upper substrate 324 and a rotation driving mechanism 325. The lower substrate 322, the ball-dividing disc 323 and the upper substrate 324 are stacked in sequence from bottom to top. Specifically, a gasket 327 and a sealing ring 329 are provided between the lower substrate 322 and the upper substrate 324. The gasket 327 is arranged around the ball-dividing disc 323, and the sealing ring 329 is arranged around the gasket 327, but not limited to this; the laser channel 321 runs through the lower substrate 322 and the upper substrate 324, and the welding nozzle 33 is installed at the bottom of the lower substrate 322; the lower substrate 3 22 is provided with a material dropping channel 322a and a slag discharge notch 322b, one end of the material dropping channel 322a forms a material dropping notch 322a1 on the upper surface of the lower substrate 322, and the other end of the material dropping channel 322a is connected to the laser channel 321, and the slag discharge notch 322b is located on the upper surface of the lower substrate 322; the ball dividing disc 323 is provided with a plurality of ball dividing holes 323a along the circumferential direction; the upper substrate 324 is provided with a material feeding channel 324a, and the material feeding channel 324a forms a material feeding outlet 324a1 on the lower surface of the upper substrate 324, and the material dropping notch 322a1, the slag discharge notch 322b and The feed outlets 324a1 are respectively opposite to the circumference of the ball-distributing holes 323a. The feed channel 324a forms a feed outlet 324a1 on the lower surface of the upper substrate 324. The feed channel 324a forms a feed inlet on the upper surface of the upper substrate 324. The solder balls can enter the feed channel 324a from the feed inlet and fall out from the feed outlet 324a1, but this is not limited to the feed inlet. The feed inlet can also be formed on the side wall of the upper substrate 324. The output end of the rotating drive mechanism 325 passes through the upper substrate 324 and is connected to the ball-distributing disc 323. The rotating drive mechanism 325 can drive the ball-distributing disc 323 to rotate. The disc 323 rotates, so that the solder balls falling out of the feed outlet 324a1 fall into the material drop port 322a1 through the ball separation hole 323a of the ball separation disc 323, and then enter the laser channel 321 through the material drop channel 322a and fall into the welding channel 331 of the welding nozzle. When the solder balls fail to effectively fall into the material drop port 322a1 and are taken away by the ball separation disc 323, the rotating drive mechanism 325 continues to drive the ball separation disc 323 to rotate, so that the solder balls in the ball separation hole 323a that do not fall into the material drop port 322a1 fall into the slag discharge slot 322b, thereby automatically cleaning the residual solder balls. The rotating drive mechanism 325 can adopt an existing rotary motor, but is not limited thereto.

[0037] See also Figures 9 and 10In this embodiment, the lower substrate 322 is provided with a slag discharge channel 322c, and one end of the slag discharge channel 322c is connected to the slag discharge notch 322b, so that the solder balls falling into the slag discharge notch 322b can fall into the slag discharge channel 322c. Specifically, the other end of the slag discharge channel 322c forms a slag discharge outlet on the side wall of the lower substrate 322, so that the solder balls located in the slag discharge channel 322c can be discharged from the slag discharge outlet. More specifically, the slag discharge notch 322b is an arc-shaped groove, which is also directly opposite to the circumference of the ball-dividing hole 323a, fully ensuring that the solder balls in the ball-dividing hole 323a that have not fallen into the drop-out port 322a1 can all fall into the slag discharge notch 322b, and fall from the slag discharge notch 322b into the slag discharge channel 322c. However, this is not limited to the above. For example, the lower substrate 322 may only be provided with a slag discharge groove 322b, the depth of which is greater than the diameter of the solder ball to ensure that the solder ball does not rub against the upper substrate 324 and the lower substrate 322. The residual solder ball is stored through the slag discharge groove 322b. The shape of the slag discharge groove 322b may be a long groove shape to facilitate the storage of more solder balls.

[0038] See also Figures 3 to 5 The welding plate assembly 32 further includes a feed pipe 326 and a pressurized gas supply mechanism 328. The feed pipe 326 is mounted on the upper substrate 324 and communicated with a feed inlet. The feed pipe 326 is used to store solder balls and feed the feed inlet. The solder balls in the feed pipe 326 can enter the feed channel 324a through the feed inlet, and then fall from the feed channel 324a through the feed outlet 324a1 into the ball-dividing hole 323a of the ball-dividing disc 323, thereby realizing ball supply. The pressurized gas supply mechanism 328 is connected to the lower substrate 322 and is used to provide pressurized gas to the laser channel 321 and the welding channel 331. The solder balls have a certain blocking effect on the outlet of the welding channel 331, causing the air pressure in the laser channel 321 and the welding channel 331 to increase, and the air pressure detection mechanism that detects the increase in air pressure triggers the laser emitter 36, so that the laser emitter 36 emits a laser, and the solder balls are hit by the laser and quickly liquefied, and the molten tin liquid separates from the outlet of the welding channel 331 and directly comes to the welding part of the product abutting it, thereby realizing welding. In this embodiment, the pressurized gas is nitrogen, but it is not limited to this.

[0039] See also Figure 2 and Figure 3The laser solder ball welding machine 100 of the present invention also includes a second visual system 6, which is connected to the housing 31 and is used to take photos and locate the product on the product placement table 5. The second visual system 6 is first moved to a position corresponding to the product placement table 5 by the moving mechanism 2, so that the second visual system 6 takes photos and locates the product on the product placement table 5 to obtain the position information of the welding position of the product. The moving mechanism 2 then drives the laser welding mechanism 3 to move according to the position information, so that the welding nozzle 33 moves to the corresponding position and welds the product. Among them, the second visual system 6 can adopt an existing CCD visual system, etc.

[0040] See also Figure 2 and Fig.14 The laser solder ball welding machine 100 of the present invention further includes a solder ball collecting box 7, which is disposed on the supporting platform 1 and is used to collect solder balls. The laser channel 321 and the welding channel 331 are cleaned by nitrogen, and the solder balls discharged from the welding nozzle 33 can fall into the solder ball collecting box 7 and be collected.

[0041] Combination Figures 1 to 14 The specific working principle of the laser solder ball welding machine 100 of the present invention is as follows:

[0042] The second visual system 6 is used to perform alignment verification; the laser emitter 36 is turned on, so that the laser emitter 36 emits laser guide light, the camera of the first visual system 4 captures photos, and the industrial computer analyzes the concentricity of the optical fiber output head of the laser emitter 36 and the welding nozzle 33. According to the calculation result of the industrial computer, the second piezoelectric ceramic 382 is energized through the second power supply component 381, so that the second piezoelectric ceramic 382 pushes the second amplifier 383, and the second amplifier 383 rotates to release the second sliding member 372. The second sliding member 372 slides along the second seat body 371 under the action of the reset force, and drives the first sliding mechanism 34 to slide; the first piezoelectric ceramic 352 is energized through the first power supply component 351, so that the first piezoelectric ceramic 352 pushes the first amplifier 353 to rotate, and the first amplifier 353 releases the first sliding member 342. The first sliding member 342 slides along the first seat body 341 under the action of the reset force, and drives the laser emitter 36. The laser emitter 36 is slidable and slides, thereby fine-tuning the position of the laser emitter 36, thereby completing the automatic centering adjustment; the welding disk assembly 32 and the welding nozzle 33 of the laser welding mechanism 3 are adjusted, and the laser channel 321 and the welding channel 331 are cleaned by nitrogen, and the solder balls discharged from the welding nozzle 33 can fall into the solder ball collection box 7; the solder balls are fed to the feed pipe 326, and the products to be welded are placed on the product placement table 5, and the second visual system 6 is driven by the moving mechanism 2 to move to the position corresponding to the product placement table 5 first, so that the second visual system 6 takes a picture of the product on the product placement table 5 to obtain the position information of the welding position of the product, and the welding nozzle 33 is photographed by the first visual system 4 to obtain the position information of the welding nozzle 33. The moving mechanism 2 then drives the laser welding mechanism 3 to move according to the position information of the welding position and the position information of the welding nozzle 33, so that the welding nozzle 33 moves to the corresponding position and welds the product.

[0043] In summary, the laser welding mechanism 3 of the laser solder ball welding machine 100 of the present invention is provided with a first visual system 4, a first sliding mechanism 34 and a first PZT driving mechanism 35. The first visual system 4 is used to observe and analyze the spot of the laser emitted by the laser emitter 36 and the center position of the welding nozzle 33. According to the analysis result, the first power supply component 351 is used to energize the first piezoelectric ceramic 352, so that the first piezoelectric ceramic 352 converts the electrical signal into mechanical displacement and drives the first sliding mechanism 34 to slide, so that the first sliding mechanism 34 drives the laser emitter 36 to slide together, and then the position of the laser beam emitted by the laser emitter 36 is fine-tuned, so that the laser beam and the welding nozzle 33 are accurately aligned, and the laser alignment is automatically adjusted to ensure that the laser beam can be shot onto the solder ball and melt the solder ball; the laser solder ball welding machine 100 of the present invention can drive the laser welding mechanism 3 to move through the moving mechanism 2, so that the welding nozzle 33 of the laser welding mechanism 3 moves to the position corresponding to the product to be welded, so as to realize automatic welding of the product with high welding quality.

[0044] The above disclosure is only a preferred embodiment of the present invention, which cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are all within the scope of the present invention.

Claims

1. A laser solder ball welding machine, characterized in that: It includes a supporting platform, a moving mechanism, a laser welding mechanism, a first visual system and a product placement table, wherein the moving mechanism is arranged on the supporting platform; the laser welding mechanism includes a shell, a welding disk assembly, a welding nozzle, a first sliding mechanism, a first PZT driving mechanism and a laser emitter, wherein the shell is connected to the moving mechanism, and the moving mechanism can drive the shell to move, the welding disk assembly is installed in the shell, the welding disk assembly is provided with a laser channel, the welding nozzle is arranged at the bottom of the welding disk assembly and protrudes out of the shell, the welding nozzle is provided with a welding channel, and the welding channel is connected to the laser channel, and the first sliding mechanism is slidably and adjustably arranged on the welding disk assembly The first PZT driving mechanism comprises a first power supply component and a first piezoelectric ceramic, the first power supply component is connected to the first piezoelectric ceramic, the first piezoelectric ceramic is connected to the first sliding mechanism, the laser emitter is arranged on the first sliding mechanism and is located above the laser channel, the first power supply component is energized to the first piezoelectric ceramic so that the first piezoelectric ceramic drives the first sliding mechanism to slide together with the laser emitter; the first visual system is arranged on the supporting platform, the first visual system is used to observe the spot of the laser emitted by the laser emitter and the center position of the welding nozzle; the product placement table is arranged on the supporting platform and Used to place products to be welded; the welding disk assembly includes a lower substrate, a ball dividing disc, an upper substrate and a rotating drive mechanism, the lower substrate, the ball dividing disc and the upper substrate are stacked in sequence from bottom to top, the laser channel runs through the lower substrate and the upper substrate, the welding nozzle is installed at the bottom of the lower substrate, the lower substrate is provided with a blanking channel and a slag discharge notch, one end of the blanking channel forms a blanking port on the upper surface of the lower substrate, the other end of the blanking channel is connected to the laser channel, the slag discharge notch is located on the upper surface of the lower substrate, the ball dividing disc is provided with a plurality of ball dividing holes along the circumferential direction, the upper substrate is provided with a feed channel, and the feed channel is formed on the lower surface of the upper substrate The feed outlet is formed, the drop outlet, the slag discharge groove and the feed outlet are respectively opposite to the circumference of the ball dividing hole, the output end of the rotation drive mechanism passes through the upper substrate and is connected to the ball dividing disc, and the ball dividing disc is driven to rotate by the rotation drive mechanism so that the solder balls in the ball dividing hole that have not fallen into the drop outlet fall into the slag discharge groove; the first sliding mechanism includes a first seat body and a first sliding member, the first seat body is arranged on the welding disk assembly, the first sliding member can be slidably arranged on the first seat body, the first piezoelectric ceramic is arranged on the first seat body and is in contact with the first sliding member, and the laser emitter is connected to the first sliding member.

2. The laser solder ball welding machine according to claim 1, characterized in that: The moving mechanism includes an X-axis moving component, a Y-axis moving component and a Z-axis moving component. The X-axis moving component is arranged on the supporting platform, the Y-axis moving component is vertically arranged on the X-axis moving component, the Z-axis moving component is vertically arranged on the Y-axis moving component, and the shell is arranged on the Z-axis moving component.

3. The laser solder ball welding machine according to claim 1, characterized in that: The first PZT driving mechanism also includes a first amplifier, the middle part of which is pivotally connected to the first seat, the first amplifier is located between the first piezoelectric ceramic and the first sliding member, the first piezoelectric ceramic is abutted against one end of the first amplifier, and the other end of the first amplifier is abutted against the first sliding member, and the force arm of the first piezoelectric ceramic acting on the first amplifier is shorter than the force arm of the first sliding member acting on the first amplifier.

4. The laser solder ball welding machine according to claim 1, characterized in that: The laser welding mechanism also includes a second sliding mechanism and a second PZT driving mechanism. The second sliding mechanism is slidably and adjustably arranged on the upper part of the welding disk assembly. The first sliding mechanism is arranged on the second sliding mechanism. The second PZT driving mechanism includes a second power supply component and a second piezoelectric ceramic. The second power supply component is connected to the second piezoelectric ceramic, and the second piezoelectric ceramic is connected to the second sliding mechanism. The second piezoelectric ceramic is energized by the second power supply component so that the second piezoelectric ceramic drives the second sliding mechanism to slide.

5. The laser solder ball welding machine according to claim 4, characterized in that: The second sliding mechanism includes a second seat body and a second sliding member, the second seat body is arranged on the welding disk assembly, the second sliding member can be slidably arranged on the second seat body, the second piezoelectric ceramic is arranged on the second seat body and is in contact with the second sliding member, and the first sliding mechanism is arranged on the second sliding member.

6. The laser solder ball welding machine according to claim 5, characterized in that: The second PZT driving mechanism also includes a second amplifier, the middle part of the second amplifier is pivotally connected to the second seat, the second amplifier is located between the second piezoelectric ceramic and the second sliding member, the second piezoelectric ceramic is abutted against one end of the second amplifier, and the other end of the second amplifier is abutted against the second sliding member, and the force arm of the second piezoelectric ceramic acting on the second amplifier is shorter than the force arm between the second sliding member and the second amplifier.

7. The laser solder ball welding machine according to claim 1, characterized in that: It also includes a second visual system, which is connected to the shell and is used to take pictures and locate the products on the product placement table.

8. The laser solder ball welding machine according to claim 1, characterized in that: A solder ball collecting box is also included. The solder ball collecting box is arranged on the supporting platform and is used to collect solder balls.

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