Lens protection assembly of laser solder ball welding device

Abstract

The invention belongs to the technical field of solder ball welding, and particularly relates to a protective lens assembly of a laser solder ball welding device, which comprises a sealing protective lens and a sleeve component, the sleeve component is in a hollow stand column shape, the lower end of the sleeve component is used for being fixedly connected with the upper side of an upper end cover of a rotating disc type solder ball pump head of the laser solder ball welding device, a first laser through hole penetrating up and down is formed in the sleeve component, and the first laser through hole is coaxially communicated with a light through hole in the upper end cover. The inner diameter of the first laser through hole is the same as that of the light through hole; the sealing protection lens is fixedly mounted at the upper end of the sleeve component and seals and covers an upper opening of the first laser through hole; by arranging the sleeve component, the height of the sealing protection lens can be increased, the distance between the sealing protection lens and the nozzle of the rotating disc type tin ball pump head is farther, pollution of tin slag to the sealing protection lens is slower, the replacement frequency of the sealing protection lens can be reduced, the service life of the sealing protection lens is prolonged, and the maintenance cost is reduced.

Description

Technical Field

[0001] This invention belongs to the field of laser solder ball welding technology, and specifically relates to a protective lens assembly for a laser solder ball welding device. Background Technology

[0002] Laser solder ball bonding is a highly efficient welding technology primarily used in the semiconductor and electronics manufacturing industries. A specialized single-ball separating system transfers solder balls from a container to a spray head. The high-pulse energy of a laser instantly melts the solder balls placed on the spray head. Then, using inert gas pressure, the molten solder is sprayed onto the solder joint surface, forming an interconnected solder joint. This non-contact welding method not only avoids solder splatter but also ensures a clean and efficient welding process. Throughout the process, the solder joint and the substrate never come into contact, eliminating the electrostatic discharge threat associated with contact. Laser solder ball bonding requires no flux; the solder balls are propelled by inert gas, minimizing both thermal and mechanical stresses during the welding process. Due to its high precision, high efficiency, and low heat impact, this welding process meets the demands for miniaturization and precision in electronic devices. It is widely used in the microelectronic packaging of high-frequency, high-power devices, bringing about a new revolution in chip packaging and microelectronic device welding, and helping the semiconductor industry move towards a new stage of higher quality and more intelligent development.

[0003] Existing laser solder ball welding devices typically use rotary solder ball pump heads (such as Chinese invention patent "A Laser Spray Solder Ball Welding Mechanism" with patent application number 202110025776.9, and Chinese invention patent "A Laser Solder Ball Welding Device" with patent application number 202111654674.X). The laser enters the solder ball pump head through a sealed protective lens, and then exits from the nozzle of the rotary solder ball pump head to irradiate the solder ball, melting it and thus performing the welding. Among them, the sealing protective lens, as a "transparent barrier" of the soldering cavity, can prevent dust from entering the soldering cavity, limit the backflow and splashing of solder dross during the soldering process, and maintain the stable gas pressure inside the soldering cavity when inert gas is introduced into the soldering cavity, preventing the inert gas from leaking out; it is an important component to ensure the stable and reliable solder ball soldering process.

[0004] However, since the sealing and protective lenses of existing laser solder ball welding devices are fixedly installed in the light-transmitting holes on the upper end cover of the rotary solder ball pump head, the distance between the sealing and protective lenses and the nozzles of the rotary solder ball pump head is relatively close. This results in technical problems such as a large amount of solder dross splashing onto the sealing and protective lenses during the solder ball welding process using existing laser solder ball welding devices, rapid contamination of the sealing and protective lenses by the solder dross, frequent replacement of the sealing and protective lenses, and increased maintenance costs. Summary of the Invention

[0005] This invention provides a protective lens assembly for a laser solder ball welding device, solving the technical problems of existing laser solder ball welding devices where the sealing protective lens is fixedly installed in the light-transmitting hole on the upper end cover of the rotary solder ball pump head, resulting in a close distance between the sealing protective lens and the nozzle of the rotary solder ball pump head. This leads to a large amount of solder dross splashing onto the sealing protective lens during solder ball welding, rapid contamination of the sealing protective lens by the solder dross, frequent replacement of the sealing protective lens, and increased maintenance costs.

[0006] The technical solution adopted in this invention is: a protective lens assembly for a laser solder ball welding device, comprising a sealing protective lens and a sleeve component; the sleeve component is in the shape of a hollow column, and the lower end of the sleeve component is used to be fixedly connected to the upper side of the upper end cover of the rotary solder ball pump head of the laser solder ball welding device; the sleeve component has a first laser through hole extending vertically, and the first laser through hole is coaxially connected with the light-transmitting hole on the upper end cover; the inner diameter of the first laser through hole is the same as the inner diameter of the light-transmitting hole; The sealing and protective lens is fixedly installed on the upper end of the sleeve component and seals and covers the upper opening of the first laser through hole.

[0007] By setting the sleeve component, the height of the sealing protective lens can be increased, so that the laser solder ball welding device for the protective lens assembly using the laser solder ball welding device provided by the present invention has a greater distance between the sealing protective lens and the nozzle of the rotary solder ball pump head compared to existing laser solder ball welding devices. This results in less solder dross splashing onto the sealing protective lens during solder ball welding, slower contamination of the sealing protective lens by the solder dross, reduced replacement frequency of the sealing protective lens, increased service life of the sealing protective lens, and reduced maintenance costs.

[0008] Furthermore, the sleeve component includes a sliding cylinder, a first sleeve, and an adjusting member; The bottom end of the first sleeve is fixedly installed on the upper side of the upper end cover. The first sleeve is sleeved on the sliding cylinder, so that the sliding cylinder can slide linearly back and forth in the first sleeve in the vertical direction. The first laser through hole is opened on the sliding cylinder and penetrates the sliding cylinder vertically. The sealing protective lens is fixedly installed on the upper end of the sliding cylinder. The adjusting member is used to adjust the sliding height of the sliding cylinder in the first sleeve in the vertical direction.

[0009] By adjusting the sliding height of the sliding cylinder within the first sleeve along the vertical direction using the adjusting component, the height of the sealing protective lens can be adjusted. This allows the protective lens assembly of the laser solder ball welding device provided by the present invention to adjust the height of the sealing protective lens according to the working distance (focal length) of the laser emitter. It can raise the height of the sealing protective lens as much as possible without interfering with the emission end of the laser emitter, making the protective lens assembly of the laser solder ball welding device provided by the present invention applicable to various types of laser emitters (e.g., different power, different working distance, different gain media, etc.), thus improving its versatility.

[0010] Furthermore, the sleeve component also includes a mounting base plate that is fixedly connected to or integrally formed on the bottom end of the first sleeve; The mounting base plate is used to connect to the upper side of the upper end cover with bolts. The mounting base plate has a through hole that runs vertically through the top and bottom. The through hole is coaxially connected to the inner hole of the first sleeve. The inner diameter of the through hole is the same as the inner diameter of the inner hole of the first sleeve.

[0011] Furthermore, the sleeve component also includes a plurality of sliding blocks that are fixedly connected to or integrally formed on the outer circumferential surface of the bottom end of the sliding cylinder, and each of the sliding blocks is evenly distributed along the circumference of the sliding cylinder; The outer circumferential surface of the first sleeve is provided with a plurality of sliding grooves, each sliding groove extending along the vertical direction, the upper end of each sliding groove extending to the top of the first sleeve, and each sliding groove penetrating to the inner side of the first sleeve; the sliding grooves are provided in a one-to-one correspondence with the sliding blocks, and each sliding block is slidably connected in the corresponding sliding groove, so that each sliding block can slide back and forth linearly in the vertical direction in the corresponding sliding groove.

[0012] By enabling each of the sliding blocks to slide back and forth linearly in the vertical direction within its corresponding sliding groove, and by utilizing the limiting and guiding effect of each sliding groove on its corresponding sliding block, the sliding cylinder can slide back and forth linearly in the vertical direction more stably under the guidance of each sliding groove and each sliding block.

[0013] Furthermore, the adjusting member includes a second sleeve sleeved outside the first sleeve; the second sleeve is used to thread into each of the sliding blocks.

[0014] By threading the second sleeve with each of the sliding blocks, the operator can adjust the sliding height of the sliding cylinder in the vertical direction within the first sleeve by rotating the second sleeve.

[0015] Furthermore, the second sleeve is a hollow cylinder, and an internal thread is formed on the inner circumferential surface of the second sleeve; The outer end of each sliding block extends through the corresponding sliding groove to the outside of the first sleeve. The outer end of each sliding block is provided with an external thread, which is used to mate with the internal thread.

[0016] Furthermore, the adjusting component also includes a limiting ring sleeved outside the first sleeve, and the bottom end of the second sleeve contacts the upper side of the mounting base plate; The limiting ring is disposed on the upper side of the second sleeve. The bottom end of the limiting ring contacts the top end of the second sleeve. The top end of the limiting ring extends radially inward to form an annular inner flange. The lower side of the annular inner flange contacts the top end face of the first sleeve. A plurality of clearance grooves are provided on the inner circumferential surface of the annular inner flange. Each clearance groove extends along the vertical direction and penetrates the annular inner flange vertically. The clearance grooves are correspondingly provided with the sliding blocks one by one, so that each sliding block can slide into the corresponding sliding groove through the corresponding clearance groove. The inner circumferential surface of the annular inner flange mates with the outer circumferential surface of the sliding cylinder, and the second sleeve can rotate around its central axis outside the sliding cylinder and the first sleeve. The limiting ring is fixed to the first sleeve by a clamping bolt, and the bottom end face of the limiting ring is used to restrict the upward sliding of each sliding block in the corresponding sliding groove.

[0017] By creating multiple clearance grooves on the inner circumferential surface of the annular inner flange, with each groove extending along the vertical direction and penetrating the annular inner flange vertically, and by aligning each clearance groove with a corresponding sliding block, the bottom end of the first sleeve can be inserted into the second sleeve after passing through the limiting ring (simultaneously, each sliding block slides into its corresponding sliding groove through the corresponding clearance groove), thus preventing the limiting ring from obstructing the first sleeve in the second sleeve. The installation inside the sleeve causes obstruction. After the first sleeve is installed inside the second sleeve, the limiting ring is rotated to make the clearance grooves and sliding grooves of each sliding block misaligned. Then, the limiting ring is fixed on the first sleeve using the clamping bolt. The limiting ring can then be used to restrict the upward sliding of each sliding block in the corresponding sliding groove, preventing the first sleeve from sliding out of the second sleeve when the operator rotates the second sleeve to adjust the sliding height of the sliding cylinder in the first sleeve along the vertical direction.

[0018] Furthermore, the top end of the sliding cylinder extends radially outward to form an annular outer flange, and the top surface of the limiting ring is used to abut against the lower surface of the annular outer flange to restrict the downward sliding of the sliding cylinder.

[0019] Furthermore, the protective lens assembly of the laser solder ball welding device also includes a window cover; The top of the sliding cylinder is provided with a circular mounting groove, and the circular mounting groove is coaxial with the sliding cylinder; The circular mounting groove is used to install a sealing and protective lens. The sealing and protective lens is circular, and its outer peripheral surface mates with the inner wall of the circular mounting groove. The bottom of the circular mounting groove is used to support the sealing and protective lens. The first laser through-hole is formed on the bottom of the circular mounting groove. The window mirror cover is threaded to the outer peripheral surface of the top end of the sliding cylinder. The window mirror cover is used to press down the upper side of the sealing and protective lens to fix the sealing and protective lens in the circular mounting groove. The window mirror cover has a second laser through hole, which allows the laser to pass vertically downward through the second laser through hole, the sealing protective lens, and the first laser through hole before entering the light-transmitting hole.

[0020] Furthermore, the protective lens assembly of the laser solder ball welding device also includes a sealing ring, which is annular in shape; the sealing ring is pressed between the window cover and the sealing protective lens; the second laser through hole and the sealing ring are both coaxially arranged with the sealing protective lens; the radius of the second laser through hole is not greater than the radius of the inner hole of the sealing ring; the outer diameter of the sealing ring is not greater than the outer diameter of the sealing protective lens.

[0021] By pressing the sealing ring between the window cover and the protective lens, rigid compression between the window cover and the protective lens can be prevented when the window cover presses against the protective lens, thus preventing damage to the protective lens. It can also prevent water and dust from entering the protective lens assembly through the second laser through-hole and the gap between the protective lens and the window cover, thereby improving the sealing performance of the protective lens assembly of the laser solder ball welding device.

[0022] Furthermore, the projection of the first laser through-hole onto the sealing protective lens is located within one of the sectors of the sealing protective lens.

[0023] By positioning the projection of the first laser through-hole onto one sector of the sealing protective lens, the solder dross that splashes backflow during the soldering process using the laser soldering device of the protective lens assembly can only splash onto one sector of the sealing protective lens through the first laser through-hole, thus only contaminating that sector. By rotating the sealing protective lens, the projection of the first laser through-hole onto the sealing protective lens can be positioned in another sector, ensuring that the projection of the first laser through-hole onto the sealing protective lens is in a clean sector. This allows the sealing protective lens to be reused multiple times, further reducing the replacement frequency of the sealing protective lens, increasing its service life, and reducing maintenance costs. Attached Figure Description

[0024] To more clearly illustrate the technical solution of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic cross-sectional view of a laser solder ball bonding device in the prior art; Figure 2 This is a cross-sectional structural schematic diagram of the laser solder ball welding device in the embodiment; Figure 3 This is a cross-sectional structural schematic diagram of the protective lens assembly of the laser solder ball welding device in the embodiment; Figure 4 This is a three-dimensional structural schematic diagram of the protective lens assembly of the laser solder ball welding device in the embodiment; Figure 5 This is a schematic diagram of the assembly structure of the protective lens assembly of the laser solder ball welding device in the embodiment. Figure 1 ; Figure 6 This is a schematic diagram of the assembly structure of the protective lens assembly of the laser solder ball welding device in the embodiment. Figure 2 ; Figure 7 This is a three-dimensional structural diagram of the sliding cylinder in the embodiment; Figure 8 This is a three-dimensional structural diagram of the first sleeve and the mounting base plate in the embodiment; Figure 9 This is a three-dimensional structural diagram of the limiting ring in the embodiment; Figure 10 This is a three-dimensional structural diagram of the second sleeve in the embodiment; Figure 11This is a three-dimensional structural diagram of the window mirror cover in the embodiment; Among them, 1—rotary solder ball pump head, 2—protective lens, 3—sleeve component, 4—window mirror cover, 5—sealing ring, 6—sealing protective lens; 1.1—Upper end cap; 1.2—Nozzle; 1.1.1—Light-transmitting aperture; 3.1—Sliding cylinder; 3.2—First sleeve; 3.3—Mounting base plate; 3.4—Second sleeve; 3.5—Limiting ring; 3.1.1—First laser through hole; 3.1.2—Sliding block; 3.1.3—Annular outer flange; 3.1.4—Circular mounting groove; 3.1.2.1—External thread; 3.2.1—Sliding groove; 3.3.1—Connecting hole; 3.4.1 — Internal thread; 3.5.1—Annular inner flange; 3.5.2—Relief groove; 3.5.3—Bolt hole; 4.1 — Second laser-guided hole. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0027] like Figure 1 As shown, the welding head of the existing laser solder ball welding device usually adopts a rotary solder ball pump head 1. The laser is injected into the rotary solder ball pump head 1 from the protective lens 2, and then emitted from the nozzle 1.2 of the rotary solder ball pump head 1 to irradiate the solder ball and melt it for welding. Among them, the protective lens 2, as a "transparent barrier" of the welding cavity, can block dust from entering the welding cavity, limit the backflow and splashing of solder dross during the welding process, and maintain the stable gas pressure inside the welding cavity when inert gas is introduced into the welding cavity to prevent inert gas from leaking out; it is an important component to ensure the stable and reliable solder ball welding process.

[0028] However, since the protective lens 2 of existing laser solder ball welding devices is fixedly installed in the light-transmitting hole 1.1.1 on the upper end cover 1.1 of the rotary solder ball pump head 1 (except for the present invention), Figure 1In addition to the examples, one can also refer to Chinese invention patent "A Laser Spray Solder Ball Welding Mechanism" with patent application number 202110025776.9 and Chinese invention patent "A Laser Solder Ball Welding Device" with patent application number 202111654674.X. The distance between the protective lens 2 and the nozzle 1.2 is relatively close. This results in technical problems such as a large amount of solder dross splashing onto the protective lens 2 during solder ball welding using existing laser solder ball welding devices, rapid contamination of the protective lens 2 by the solder dross, and frequent replacement of the protective lens 2, which increases maintenance costs.

[0029] To solve the above problems, such as Figure 2 As shown, this embodiment provides a protective lens assembly for a laser solder ball welding device, including a sealed protective lens 6 and a sleeve component 3; the sleeve component 3 is in the shape of a hollow column, and the lower end of the sleeve component 3 is used to be fixedly connected to the upper side of the upper end cover 1.1 of the rotary solder ball pump head 1 of the laser solder ball welding device. A first laser through hole 3.1.1 is provided on the sleeve component 3, which is coaxially connected with the light-transmitting hole 1.1.1 on the upper end cover 1.1; the inner diameter of the first laser through hole 3.1.1 is the same as the inner diameter of the light-transmitting hole 1.1.1. The sealing and protective lens 6 is fixedly installed on the upper end of the sleeve component 3 and seals and covers the upper opening of the first laser through hole 3.1.1.

[0030] By setting the sleeve component 3, the height of the sealing protective lens 6 can be increased, so that the laser solder ball welding device for the protective lens assembly using the laser solder ball welding device provided by the present invention has a greater distance between the sealing protective lens 6 and the nozzle 1.2 of the rotary solder ball pump head 1 compared with the existing laser solder ball welding device. This results in a smaller amount of solder dross splashing onto the sealing protective lens 6 during the solder ball welding process, and the solder dross contaminating the sealing protective lens 6 is slower. This reduces the replacement frequency of the sealing protective lens 6, increases its service life, and reduces maintenance costs.

[0031] In one embodiment, such as Figures 3 to 6 As shown, the sleeve component 3 includes a sliding cylinder 3.1, a first sleeve 3.2, and an adjusting member; The bottom end of the first sleeve 3.2 is fixedly installed on the upper side of the upper end cover 1.1. The first sleeve 3.2 is sleeved on the outside of the sliding cylinder 3.1, so that the sliding cylinder 3.1 can slide linearly back and forth in the first sleeve 3.2 in the vertical direction. The first laser through hole 3.1.1 is opened on the sliding cylinder 3.1 and passes through the sliding cylinder 3.1 vertically. The sealing protective lens 6 is fixedly installed on the upper end of the sliding cylinder 3.1. The adjusting component is used to adjust the sliding height of the sliding cylinder 3.1 in the vertical direction in the first sleeve 3.2.

[0032] By adjusting the sliding height of the sliding cylinder 3.1 within the first sleeve 3.2 in the vertical direction using an adjusting component, the height of the sealing protective lens 6 is adjustable. This allows the protective lens assembly of the laser solder ball welding device provided by this invention to adjust the height of the sealing protective lens 6 according to the working distance (focal length) of the laser emitter. It maximizes the height of the sealing protective lens 6 without interfering with the emission end of the laser emitter, making the protective lens assembly of the laser solder ball welding device provided by this invention applicable to various types of laser emitters (e.g., different power, different working distance, different gain media, etc.), thus improving its versatility.

[0033] In one embodiment, such as Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 8 As shown, the sleeve component 3 also includes a mounting base plate 3.3 that is fixedly connected to or integrally formed at the bottom end of the first sleeve 3.2; The mounting base plate 3.3 is used to connect to the upper side of the upper end cover 1.1 with bolts. The mounting base plate 3.3 has a through hole 3.3.1 that runs vertically through the top and bottom. The through hole 3.3.1 is coaxially connected to the inner hole of the first sleeve 3.2. The inner diameter of the through hole 3.3.1 is the same as the inner diameter of the inner hole of the first sleeve 3.2.

[0034] Preferably, in this embodiment, such as Figures 5 to 8 As shown, the sleeve component 3 also includes multiple sliding blocks 3.1.2 that are fixedly connected or integrally formed on the outer circumferential surface of the bottom end of the sliding cylinder 3.1, and each sliding block 3.1.2 is evenly distributed along the circumference of the sliding cylinder 3.1; The outer circumferential surface of the first sleeve 3.2 is provided with multiple sliding grooves 3.2.1. Each sliding groove 3.2.1 extends in the vertical direction, and the upper end of each sliding groove 3.2.1 extends to the top of the first sleeve 3.2. Each sliding groove 3.2.1 penetrates into the inner side of the first sleeve 3.2. The sliding grooves 3.2.1 are arranged in a one-to-one correspondence with the sliding blocks 3.1.2. Each sliding block 3.1.2 is slidably connected in the corresponding sliding groove 3.2.1, so that each sliding block 3.1.2 can slide back and forth linearly in the vertical direction in the corresponding sliding groove 3.2.1.

[0035] By enabling each sliding block 3.1.2 to slide back and forth linearly in the vertical direction within its corresponding sliding groove 3.2.1, and by utilizing the limiting and guiding effect of each sliding groove 3.2.1 on its corresponding sliding block 3.1.2, the sliding cylinder 3.1 can slide back and forth linearly in the vertical direction more stably under the guidance of each sliding groove 3.2.1 and each sliding block 3.1.2.

[0036] Specifically, in this embodiment, such as Figures 5 to 8 As shown, two sliding blocks 3.1.2 are fixedly connected or integrally formed on the outer circumferential surface of the bottom end of the sliding cylinder 3.1, and two sliding grooves 3.2.1 are opened on the outer circumferential surface of the first sleeve 3.2.

[0037] In one embodiment, such as Figure 3 and Figure 4 As shown, the adjusting component includes a second sleeve 3.4 sleeved outside the first sleeve 3.2; the second sleeve 3.4 is used to thread into each sliding block 3.1.2.

[0038] By threading the second sleeve 3.4 with each sliding block 3.1.2, the operator can adjust the sliding height of the sliding cylinder 3.1 in the vertical direction within the first sleeve 3.2 by rotating the second sleeve 3.4.

[0039] Specifically, in this embodiment, such as Figure 5 , Figure 6 , Figure 7 and Figure 10 As shown, the second sleeve 3.4 is a hollow cylinder, and an internal thread 3.4.1 is provided on the inner circumferential surface of the second sleeve 3.4; The outer end of each sliding block 3.1.2 extends through the corresponding sliding groove 3.2.1 to the outside of the first sleeve 3.2. The outer end of the sliding block 3.1.2 is provided with an external thread 3.1.2.1, which is used to mate with the internal thread 3.4.1.

[0040] Preferably, in this embodiment, such as Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 9 As shown, the adjusting component also includes a limiting ring 3.5 sleeved outside the first sleeve 3.2, and the bottom end of the second sleeve 3.4 contacts the upper side of the mounting base plate 3.3; A limiting ring 3.5 is disposed on the upper side of the second sleeve 3.4. The bottom end of the limiting ring 3.5 contacts the top end of the second sleeve 3.4. The top end of the limiting ring 3.5 extends radially inward to form an annular inner flange 3.5.1. The lower side of the annular inner flange 3.5.1 contacts the top end of the first sleeve 3.2. Multiple clearance grooves 3.5.2 are provided on the inner circumferential surface of the annular inner flange 3.5.1. Each clearance groove 3.5.2 extends vertically and penetrates the annular inner flange 3.5.1 vertically. The clearance grooves 3.5.2 are correspondingly provided with the sliding blocks 3.1.2, so that each sliding block 3.1.2 can slide into the corresponding sliding groove 3.2.1 through the corresponding clearance groove 3.5.2. The inner circumferential surface of the annular inner flange 3.5.1 mates with the outer circumferential surface of the sliding cylinder 3.1, and the second sleeve 3.4 can rotate around its central axis outside the sliding cylinder 3.1 and the first sleeve 3.2; The limiting ring 3.5 is fixed to the first sleeve 3.2 by a clamping bolt. The bottom end face of the limiting ring 3.5 is used to restrict the upward sliding of each sliding block 3.1.2 in the corresponding sliding groove 3.2.1.

[0041] By creating multiple clearance grooves 3.5.2 on the inner circumferential surface of the annular inner flange 3.5.1, with each groove extending vertically and penetrating the annular inner flange 3.5.1 vertically, and ensuring a one-to-one correspondence between the clearance grooves 3.5.2 and the sliding blocks 3.1.2, after aligning the clearance grooves 3.5.2 and sliding grooves 3.2.1 corresponding to each sliding block 3.1.2, the bottom end of the first sleeve 3.2 can be inserted through the limiting ring 3.5 and into the second sleeve 3.4 (simultaneously, each sliding block 3.1.2 slides into its corresponding sliding groove 3.2.1 through its corresponding clearance groove 3.5.2), thus preventing the limiting ring 3.5 from interfering with the first sleeve. The installation of the first sleeve 3.2 inside the second sleeve 3.4 causes obstruction. After the installation of the first sleeve 3.2 inside the second sleeve 3.4 is completed, the limiting ring 3.5 is rotated to make the clearance groove 3.5.2 corresponding to each sliding block 3.1.2 misaligned with the corresponding sliding groove 3.2.1. Then, the limiting ring 3.5 is fixed on the first sleeve 3.2 by the clamping bolt. The limiting ring 3.5 can then be used to restrict the upward sliding of each sliding block 3.1.2 in the corresponding sliding groove 3.2.1, preventing the first sleeve 3.2 from sliding upward out of the second sleeve 3.4 when the operator rotates the second sleeve 3.4 to adjust the sliding height of the sliding cylinder 3.1 in the first sleeve 3.2 in the vertical direction.

[0042] Specifically, in this embodiment, such as Figure 4 , Figure 6 and Figure 9 As shown, bolt holes 3.5.3 for installing clamping bolts are provided on the outer circumferential surface of the limiting ring 3.5.

[0043] Preferably, in this embodiment, such as Figure 3 , Figure 5 , Figure 6 and Figure 7 As shown, the top end of the sliding cylinder 3.1 extends radially outward to form an annular outer flange 3.1.3, and the top surface of the limiting ring 3.5 is used to abut against the lower surface of the annular outer flange 3.1.3 to restrict the downward sliding of the sliding cylinder 3.1.

[0044] Preferably, in this embodiment, such as Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 11 As shown, the protective lens assembly of the laser solder ball welding device also includes a window cover 4; The top of the sliding cylinder 3.1 is provided with a circular mounting groove 3.1.4, which is coaxial with the sliding cylinder 3.1. The circular mounting groove 3.1.4 is used to install the sealing and protective lens 6. The sealing and protective lens 6 is circular, and the outer peripheral surface of the sealing and protective lens 6 fits with the inner wall of the circular mounting groove 3.1.4. The bottom of the circular mounting groove 3.1.4 is used to support the sealing and protective lens 6. The first laser through hole 3.1.1 is opened on the bottom of the circular mounting groove 3.1.4. The window mirror cover 4 is threaded to the outer circumferential surface of the top end of the sliding cylinder 3.1. The window mirror cover 4 is used to press down the upper side of the sealing and protective lens 6 to fix the sealing and protective lens 6 in the circular mounting groove 3.1.4. The window mirror cover 4 has a second laser through hole 4.1, which allows the laser to pass vertically downward through the second laser through hole 4.1, the sealing protective lens 6 and the first laser through hole 3.1.1 before entering the light through hole 1.1.1.

[0045] Specifically, in this embodiment, such as Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 11 As shown, the protective lens assembly of the laser solder ball welding device also includes a sealing ring 5, which is circular in shape; the sealing ring 5 is pressed between the window cover 4 and the sealing protective lens 6; the second laser through hole 4.1 and the sealing ring 5 are both coaxially arranged with the sealing protective lens 6; the radius of the second laser through hole 4.1 is not greater than the radius of the inner hole of the sealing ring 5; the outer diameter of the sealing ring 5 is not greater than the outer diameter of the sealing protective lens 6.

[0046] By pressing the sealing ring 5 between the window cover 4 and the sealing protective lens 6, rigid compression between the window cover 4 and the sealing protective lens 6 can be prevented, thus preventing damage to the sealing protective lens 6. It can also prevent water and dust from entering the protective lens assembly through the second laser through hole 4.1 and the gap between the sealing protective lens 6 and the window cover 4, thereby improving the sealing performance of the protective lens assembly of the laser solder ball welding device.

[0047] Specifically, in this embodiment, such as Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7As shown, the projection of the first laser through-hole 3.1.1 onto the sealing protective lens 6 is located within one of the sectors of the sealing protective lens 6.

[0048] By positioning the projection of the first laser through-hole 3.1.1 onto one sector of the sealing protective lens 6, the solder dross splashed during the solder ball soldering process using the laser solder ball soldering device with the protective lens assembly can only splash onto one sector of the sealing protective lens 6 through the first laser through-hole 3.1.1, thus only contaminating that sector. By rotating the sealing protective lens 6, the projection of the first laser through-hole 3.1.1 onto the sealing protective lens 6 can be positioned onto another sector of the sealing protective lens 6, ensuring that the projection of the first laser through-hole 3.1.1 onto the sealing protective lens 6 is within a clean sector. This allows the sealing protective lens 6 to be reused multiple times, further reducing the replacement frequency of the sealing protective lens 6, increasing its service life, and reducing maintenance costs.

[0049] The protective lens assembly of the laser solder ball welding device provided by the present invention has at least the following technical effects or advantages: 1. By setting the sleeve component 3, the height of the sealing protective lens 6 can be increased, so that the laser solder ball welding device for the protective lens assembly using the laser solder ball welding device provided by the present invention has a greater distance between the sealing protective lens 6 and the nozzle 1.2 of the rotary solder ball pump head 1 compared with the existing laser solder ball welding device. This results in a smaller amount of solder dross splashing onto the sealing protective lens 6 during the solder ball welding process, and slower contamination of the sealing protective lens 6 by the solder dross. This reduces the replacement frequency of the sealing protective lens 6, increases its service life, and reduces maintenance costs.

[0050] 2. The sliding height of the sliding cylinder 3.1 within the first sleeve 3.2 is adjusted using the adjusting component to achieve adjustable height of the sealing protective lens 6. This allows the protective lens assembly of the laser solder ball welding device provided by this invention to adjust the height of the sealing protective lens 6 according to the working distance (focal length) of the laser emitter. This ensures that the sealing protective lens 6 is raised as high as possible without interfering with the laser emitter's output end, making the protective lens assembly of the laser solder ball welding device provided by this invention applicable to various types of laser emitters (e.g., different power, different working distance, different gain media, etc.), thus improving its versatility.

[0051] 3. By enabling each sliding block 3.1.2 to slide back and forth linearly in the vertical direction within its corresponding sliding groove 3.2.1, and by utilizing the limiting and guiding effect of each sliding groove 3.2.1 on its corresponding sliding block 3.1.2, the sliding cylinder 3.1 can slide back and forth linearly in the vertical direction more stably under the guidance of each sliding groove 3.2.1 and each sliding block 3.1.2.

[0052] 4. By threading the second sleeve 3.4 with each sliding block 3.1.2, the operator can adjust the sliding height of the sliding cylinder 3.1 in the vertical direction within the first sleeve 3.2 by rotating the second sleeve 3.4.

[0053] 5. By creating multiple clearance grooves 3.5.2 on the inner circumferential surface of the annular inner flange 3.5.1, with each groove extending vertically and penetrating the annular inner flange 3.5.1 vertically, and ensuring a one-to-one correspondence between the clearance grooves 3.5.2 and the sliding blocks 3.1.2, after aligning the clearance grooves 3.5.2 and corresponding sliding grooves 3.2.1 of each sliding block 3.1.2, the bottom end of the first sleeve 3.2 can be inserted through the limiting ring 3.5 and into the second sleeve 3.4 (simultaneously, each sliding block 3.1.2 slides into its corresponding sliding groove 3.2.1 through its corresponding clearance groove 3.5.2), thus preventing the limiting ring 3.5 from interfering with the first sleeve 3.4. The installation of sleeve 3.2 inside the second sleeve 3.4 causes obstruction. After the installation of the first sleeve 3.2 inside the second sleeve 3.4 is completed, the limiting ring 3.5 is rotated to make the clearance groove 3.5.2 corresponding to each sliding block 3.1.2 misaligned with the corresponding sliding groove 3.2.1. Then, the limiting ring 3.5 is fixed on the first sleeve 3.2 by the clamping bolt. The limiting ring 3.5 can then be used to restrict the upward sliding of each sliding block 3.1.2 in the corresponding sliding groove 3.2.1, preventing the first sleeve 3.2 from sliding upward out of the second sleeve 3.4 when the operator rotates the second sleeve 3.4 to adjust the sliding height of the sliding cylinder 3.1 in the first sleeve 3.2 in the vertical direction.

[0054] 6. By pressing the sealing ring 5 between the window cover 4 and the sealing protective lens 6, rigid compression between the window cover 4 and the sealing protective lens 6 can be prevented, thus preventing damage to the sealing protective lens 6. It can also prevent water and dust from entering the protective lens assembly through the second laser through hole 4.1 and the gap between the sealing protective lens 6 and the window cover 4, thereby improving the sealing performance of the protective lens assembly of the laser solder ball welding device.

[0055] 7. By positioning the projection of the first laser through-hole 3.1.1 onto the sealing protective lens 6 within one sector of the sealing protective lens 6, the solder dross splashed during the solder ball welding process using the laser solder ball welding device with the protective lens assembly can only splash onto one sector of the sealing protective lens 6 through the first laser through-hole 3.1.1, thus only contaminating that sector of the sealing protective lens 6. By rotating the sealing protective lens 6, the projection of the first laser through-hole 3.1.1 onto the sealing protective lens 6 can be positioned within another sector of the sealing protective lens 6, ensuring that the projection of the first laser through-hole 3.1.1 onto the sealing protective lens 6 is within a clean sector. This allows the sealing protective lens 6 to be reused multiple times, further reducing the replacement frequency of the sealing protective lens 6, increasing its service life, and reducing maintenance costs.

[0056] The above are merely specific application examples of the present invention and do not constitute any limitation on the scope of protection of the present invention. All technical solutions formed by equivalent transformation or equivalent substitution fall within the scope of protection of the present invention.

Claims

1. A protective lens assembly for a laser solder ball welding device, characterized in that: It includes a sealing protective lens and a sleeve component; the sleeve component is in the shape of a hollow column, and the lower end of the sleeve component is used to be fixedly connected to the upper side of the upper end cover of the rotary solder ball pump head of the laser solder ball welding device. The sleeve component has a first laser through hole that runs vertically through it, and the first laser through hole is coaxially connected with the light-transmitting hole on the upper end cover; the inner diameter of the first laser through hole is the same as the inner diameter of the light-transmitting hole. The sealing and protective lens is fixedly installed on the upper end of the sleeve component and seals and covers the upper opening of the first laser through hole.

2. The protective lens assembly of the laser solder ball welding device according to claim 1, characterized in that: The sleeve component includes a sliding cylinder, a first sleeve, and an adjusting element; The bottom end of the first sleeve is fixedly installed on the upper side of the upper end cover. The first sleeve is sleeved on the sliding cylinder so that the sliding cylinder can slide linearly back and forth in the first sleeve in the up and down direction. The first laser through-hole is formed on the sliding cylinder and extends vertically through the sliding cylinder; the sealing protective lens is fixedly installed at the upper end of the sliding cylinder; the adjusting component is used to adjust the sliding height of the sliding cylinder in the first sleeve along the vertical direction.

3. The protective lens assembly of the laser solder ball welding device according to claim 2, characterized in that: The sleeve component also includes a mounting base plate that is fixedly connected to or integrally formed at the bottom end of the first sleeve; The mounting base plate is used to connect to the upper side of the upper end cover with bolts. The mounting base plate has a through hole that runs vertically through the top and bottom. The through hole is coaxially connected to the inner hole of the first sleeve. The inner diameter of the through hole is the same as the inner diameter of the inner hole of the first sleeve.

4. The protective lens assembly of the laser solder ball welding device according to claim 3, characterized in that: The sleeve component also includes multiple sliding blocks that are fixedly connected to or integrally formed on the outer circumferential surface of the bottom end of the sliding cylinder, and each sliding block is evenly distributed along the circumference of the sliding cylinder; The outer circumferential surface of the first sleeve is provided with a plurality of sliding grooves, each sliding groove extending along the vertical direction, the upper end of each sliding groove extending to the top of the first sleeve, and each sliding groove penetrating to the inner side of the first sleeve; the sliding grooves are provided in a one-to-one correspondence with the sliding blocks, and each sliding block is slidably connected in the corresponding sliding groove, so that each sliding block can slide back and forth linearly in the vertical direction in the corresponding sliding groove.

5. The protective lens assembly of the laser solder ball welding device according to claim 4, characterized in that: The adjusting component includes a second sleeve fitted outside the first sleeve; the second sleeve is used to thread into each of the sliding blocks.

6. The protective lens assembly of the laser solder ball welding apparatus according to claim 5, characterized in that: The adjusting component also includes a limiting ring sleeved outside the first sleeve, and the bottom end of the second sleeve contacts the upper side of the mounting base plate; The limiting ring is disposed on the upper side of the second sleeve. The bottom end of the limiting ring contacts the top end of the second sleeve. The top end of the limiting ring extends radially inward to form an annular inner flange. The lower side of the annular inner flange contacts the top end face of the first sleeve. A plurality of clearance grooves are provided on the inner circumferential surface of the annular inner flange. Each clearance groove extends along the vertical direction and penetrates the annular inner flange vertically. The clearance grooves are correspondingly provided with the sliding blocks one by one, so that each sliding block can slide into the corresponding sliding groove through the corresponding clearance groove. The inner circumferential surface of the annular inner flange mates with the outer circumferential surface of the sliding cylinder, and the second sleeve can rotate around its central axis outside the sliding cylinder and the first sleeve. The limiting ring is fixed to the first sleeve by a clamping bolt, and the bottom end face of the limiting ring is used to restrict the upward sliding of each sliding block in the corresponding sliding groove.

7. The protective lens assembly of the laser solder ball welding apparatus according to claim 6, characterized in that: The top end of the sliding cylinder extends radially outward to form an annular outer flange. The top surface of the limiting ring is used to abut against the lower surface of the annular outer flange to restrict the downward sliding of the sliding cylinder.

8. The protective lens assembly of the laser solder ball welding device according to claim 2, characterized in that: It also includes window mirror covers; The top of the sliding cylinder is provided with a circular mounting groove, and the circular mounting groove is coaxial with the sliding cylinder; The circular mounting groove is used to install a sealing and protective lens. The sealing and protective lens is circular, and its outer peripheral surface mates with the inner wall of the circular mounting groove. The bottom of the circular mounting groove is used to support the sealing and protective lens. The first laser through-hole is formed on the bottom of the circular mounting groove. The window mirror cover is threaded to the outer peripheral surface of the top end of the sliding cylinder. The window mirror cover is used to press down the upper side of the sealing and protective lens to fix the sealing and protective lens in the circular mounting groove. The window mirror cover has a second laser through hole, which allows the laser to pass vertically downward through the second laser through hole, the sealing protective lens, and the first laser through hole before entering the light-transmitting hole.

9. The protective lens assembly of the laser solder ball welding apparatus according to claim 8, characterized in that: It also includes a sealing ring, which is circular in shape; the sealing ring is pressed between the window lens cover and the sealing protective lens; the second laser through hole and the sealing ring are both coaxially arranged with the sealing protective lens; the radius of the second laser through hole is not greater than the radius of the inner hole of the sealing ring; the outer diameter of the sealing ring is not greater than the outer diameter of the sealing protective lens.

10. The protective lens assembly of the laser solder ball welding apparatus according to claim 8, characterized in that: The projection of the first laser through-hole onto the sealing and protective lens is located within one of the sectors of the sealing and protective lens.

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