CN113458532A - Multi-flexible-plate laser welding tool for optical communication module and use method thereof - Google Patents

Abstract

The invention provides a laser welding tool for multiple flexible plates of an optical communication module and a using method thereof, and the laser welding tool comprises a clamping base arranged on a platform base and a welding platform of a laser welding machine, wherein a first clamping groove for accommodating a PCB is formed at the front end of the clamping base, a second clamping groove for accommodating multiple flexible plates of a device is formed at the rear end of the clamping base, a pressing plate is arranged at the top of the rear end of the clamping base, one end of the pressing plate is connected with the clamping base in an overturning manner, a flexible plate protection plate is arranged at the other end of the pressing plate, and the flexible plate protection plate is abutted to one side of a bonding pad of the multiple flexible plates of the device in an overturning manner; the clamping base is characterized in that a pressing strip is arranged at the top of the front end of the clamping base, the pressing strip is connected with the clamping base in an overturning mode, a component protection plate is arranged on the pressing strip, a bending portion is arranged at one end, close to the bonding pad of the multiple flexible plates of the device, of the component protection plate, and the bending portion of the component protection plate is abutted to the other side of the bonding pad of the multiple flexible plates of the device. The invention has the advantages of high welding precision, reliable PCB fixation, close bonding of multiple flexible boards of devices and welding pads of the PCB, good protection capability of the multiple flexible boards and the devices, and the like.

Description

Multi-flexible-plate laser welding tool for optical communication module and use method thereof

Technical Field

The invention relates to the technical field of communication modules, in particular to a multi-flexible-plate laser welding tool for an optical communication module and a using method thereof.

Background

With the rapid development of the optical module communication industry, the optical communication module is not only developed towards a faster communication rate, but also developed towards different special fields. Different optical communication module application fields put different requirements on the structure, the function and the speed of an optical module. At present, the inside of an optical communication module in the market is mainly a TOSA single flexible board, a ROSA single flexible board and a BOSA single flexible board to realize the communication between an optical device and a PCB, and a tool clamp and equipment for welding a single flexible board pad and a PCB pad are generally applied to production practice at present; with the emergence of optical communication modules with multi-flexible-board structures, the welding of multiple flexible boards and a PCB becomes a difficult problem to be solved urgently at present.

The existing welding modes of the flexible board and the PCB of the device are mainly divided into two types, one type is of a patch type, for example, the patent with the application number of CN201910567963.2, the mode of SMT patch is adopted, the PCB is put into a fixture for fixation, then the flexible board pad is attached to the PCB pad in the patch mode, but the mode can only realize the patch of a single flexible board and the PCB at present, and the flexible board and the PCB can be welded at first to bring difficulty for the welding of the flexible board and the optical device at the later stage, so that the welding efficiency of the device and the flexible board at the later stage is reduced. Another type is a thermocompression bonding type, for example, patent application No. CN202011018455.8, which utilizes a fixture and a precision fine-tuning sliding table to effectively bond a pad of a flexible board of a device and a pad of a PCB board, and then uses a thermocompression bonding machine to achieve high-temperature bonding between the pads, but this method can only achieve welding between a single flexible board and the PCB board at present, and requires that the pads of the flexible board and the PCB board must be pads of conventional size, for welding between multiple flexible boards of the device and the PCB board, the fixture cannot simultaneously achieve accurate alignment between multiple pads, cannot achieve welding between small and dense pads of multiple flexible boards, easily causes continuous welding, and cannot effectively protect components on multiple flexible boards and the PCB board in the welding process.

Therefore, research and design on the multi-flexible-board and PCB welding tool clamp of the device have important significance on improving the welding quality and the welding efficiency of the multi-flexible-board of the optical communication module.

Disclosure of Invention

The invention aims to provide a multi-flexible-plate laser welding tool for an optical communication module and a using method thereof, which have the advantages of high welding precision, reliable PCB fixation, close bonding of multiple flexible plates of a device and a PCB pad, good protection capability of the multiple flexible plates and components and the like, and can effectively solve the problems in the background technology.

The embodiment of the invention is realized by the following technical scheme: the utility model provides a many flexible boards of optical communication module laser welding frock, is including setting up the welded platform of clamping base and laser welder on the platform base, clamping base front end shaping has the first draw-in groove of settling the PCB board, and the rear end shaping has the second draw-in groove of settling the many flexible boards of device, wherein:

a pressing plate is arranged at the top of the rear end of the clamping base, one end of the pressing plate is connected with the clamping base in an overturning manner, the other end of the pressing plate is arranged in an inclined plane, a flexible plate protection plate is arranged on the inclined plane, the pressing plate is driven to overturn relative to the clamping base by the flexible plate protection plate, the pressing plate stretches across the upper side of the multiple flexible plates of the device along the Y-axis direction, and the flexible plate protection plate is abutted to one side of a bonding pad of the multiple flexible plates of the device;

the clamping base front end top is equipped with the layering, the layering is connected with the upset of clamping base, is provided with the components and parts guard plate on it, the components and parts guard plate has the portion of bending near the pad one end of the many flexible boards of device, the layering is through driving the upset of the relative clamping base of components and parts guard plate, stretches over in the mounting plane of PCB board along the X axle direction, and makes the portion of bending butt of components and parts guard plate to the pad opposite side of the many flexible boards of device.

According to a preferred embodiment, the inclined surface comprises a first inclined surface and a second inclined surface with different slopes, and the first inclined surface and the second inclined surface are inclined towards the lower surface of the pressing plate and are in a claw shape as a whole;

the distance between the first inclined plane and the second inclined plane in the Y-axis direction is matched with the distance between the bonding pads of the multiple flexible boards of the device.

According to a preferred embodiment, the top of the rear end of the clamping base is provided with a bearing seat with a step hole, the large end of the step hole is provided with a bearing in interference fit, a first screw is arranged in the step hole, and the first screw radially penetrates through the bearing along the step hole to be connected to the pressing plate.

According to a preferred embodiment, the bearing seat is provided with a waist hole along the Z-axis direction, and the clamping base is connected with the waist hole through a second screw.

According to a preferred embodiment, the lower surface of one end, close to the inclined plane, of the pressing plate is provided with a suction nail, and a first suction iron is arranged at the position, corresponding to the suction nail, of the clamping base.

According to a preferred embodiment, a handle is arranged on one side of the pressure plate.

According to a preferred embodiment, the clamping base is provided with a first boss with a threaded hole, and one end of the pressing strip is connected with the first boss through a pin.

According to a preferred embodiment, a second magnet is arranged at the position of the clamping base corresponding to the other end of the pressing strip.

According to a preferred embodiment, the top of the front end of the clamping base is further provided with a second boss with a threaded hole, the threaded hole is in threaded fit with a locking screw, and the locking screw is in threaded fit with the threaded hole and stretches across the upper side of the PCB along the X-axis direction.

The invention also provides a using method of the optical communication module multi-flexible-plate laser welding tool, which is applied to the tool and comprises the following steps:

step one, placing the multi-flexible board and the PCB of the device welded with the auxiliary bonding pad into a clamping groove corresponding to the clamping base, and tightly pushing the PCB by using a locking screw;

turning the pressing strip to a closed state, and adjusting the position of a component protection plate on the pressing strip to ensure that the component protection plate can protect components on the PCB and reserve a moving space for solder paste feeding for a row soldering pan;

turning the pressing plate to a closed state, and adjusting the position of the bearing seat to enable the inclined plane of the pressing plate to be pressed between the auxiliary bonding pad of the multiple flexible boards and the row bonding pad, so that the bonding pads of the multiple flexible boards are tightly attached to the bonding pads of the PCB;

fourthly, adjusting the position of a flexible plate protection plate arranged on an inclined plane at the front end of the pressing plate, so that the flexible plate protection plate can perform laser high-temperature protection on multiple flexible plates and reserve a moving space for solder paste feeding for a row soldering pan;

and step five, applying solder paste, and operating a laser welding machine to enable the laser focus to irradiate the multi-flexible-board row welding pads so as to weld the multi-flexible-board row welding pads with the PCB (printed circuit board) welding pads.

The technical scheme of the embodiment of the invention at least has the following advantages and beneficial effects: (1) the welding precision is high, the welding is realized on the jointed PCB bonding pad and the multiple flexible board bonding pads through laser focusing, the welding precision is high, and the problem that the welding of small and dense bonding pads cannot be realized through manual welding and hot-press welding is solved; (2) the PCB is reliably fixed, and the welding quality of a multi-flexible-board welding pad and a PCB welding pad of a device can be effectively guaranteed not to be influenced in the dynamic welding process by adopting a PCB fixing and clamping mode of tightly jacking the clamping groove and the locking screw; (3) the multi-flexible-board bonding pad of the device is tightly attached to the PCB bonding pad, and the multi-flexible-board bonding pad of the device is tightly and effectively combined with the PCB bonding pad by adopting a pressing plate pressure point pressing mode, an iron absorption mode and a nail absorption pressing mode; (4) the good many flexible boards of many, components and parts protective capability through the application of flexible board guard plate and components and parts guard plate, has effectually avoided the laser irradiation high temperature to damage the components and parts on many flexible boards of device and the PCB board.

Drawings

Fig. 1 and fig. 2 are schematic structural diagrams of a multi-flexible-plate laser welding tool for an optical communication module according to embodiment 1 of the present invention;

fig. 3 is an assembly diagram of components of a multi-flexible-plate laser welding tool for an optical communication module according to embodiment 1 of the present invention;

fig. 4 is a schematic view of a platform base of a multi-flexible-plate laser welding tool for an optical communication module according to embodiment 1 of the present invention;

fig. 5 is a schematic view of a clamping base corresponding to multiple flexible boards of an a-type device and an a-type PCB of the optical communication module multiple flexible board laser welding tool provided in embodiment 1 of the present invention;

fig. 6 is a schematic view of a pressing plate corresponding to multiple flexible boards of an a-type device and an a-type PCB of the optical communication module multiple flexible board laser welding tool provided in embodiment 1 of the present invention;

fig. 7 is a schematic oblique view of a front end of a pressing plate corresponding to a multiple flexible board of an a-type device and an a-type PCB of an optical communication module multiple flexible board laser welding tool according to embodiment 1 of the present invention;

fig. 8 is a schematic view of a pressing strip corresponding to multiple flexible boards of an a-type device and an a-type PCB of the optical communication module multiple flexible board laser welding tool provided in embodiment 1 of the present invention;

fig. 9 is a schematic view of a multi-flexible board of an a-type device and a corresponding flexible board protection plate of an a-type PCB of the optical communication module multi-flexible board laser welding tool according to embodiment 1 of the present invention;

fig. 10 is a schematic diagram of a component protection plate corresponding to multiple flexible boards of an a-type device and an a-type PCB of the optical communication module multiple flexible board laser welding tool provided in embodiment 1 of the present invention;

fig. 11 is a pin diagram of a multi-flex laser welding tool for an optical communication module according to embodiment 1 of the present invention;

fig. 12 is a schematic structural diagram of a multi-flexible board of an a-type device and a multi-flexible board of an a-type PCB after completing welding corresponding to the multi-flexible board of the optical communication module laser welding tool provided in embodiment 1 of the present invention;

fig. 13 is a schematic view of a pressing plate corresponding to a multiple flexible board of a B-type device and a B-type PCB of the optical communication module multiple flexible board laser welding tool provided in embodiment 1 of the present invention;

fig. 14 is a schematic oblique view of a front end of a pressing plate corresponding to a multi-flexible board of a B-type device and a B-type PCB of an optical communication module multi-flexible board laser welding tool according to embodiment 1 of the present invention;

fig. 15 is a schematic view of a pressing strip corresponding to multiple flexible boards of a B-type device and a B-type PCB of the optical communication module multiple flexible board laser welding tool provided in embodiment 1 of the present invention;

fig. 16 and 17 are schematic diagrams of multiple flexible boards of a B-type device and corresponding flexible board protection plates of a B-type PCB board of the optical communication module multiple flexible board laser welding tool according to embodiment 1 of the present invention;

fig. 18 is a schematic diagram of a multiple flexible boards of a B-type device and a component protection plate corresponding to a B-type PCB of the optical communication module multiple flexible board laser welding tool provided in embodiment 1 of the present invention;

fig. 19 is a schematic structural diagram of a multi-flexible board of an a-type device and a multi-flexible board of an a-type PCB after completing welding corresponding to the multi-flexible board of the optical communication module laser welding tool provided in embodiment 1 of the present invention;

icon: 1-a platform base, 2-locking screws, 3-first screws, 4-suction screws, 5-first suction irons, 6-second screws, 7-bearings, 8-round pads, 9-bearing seats, 10-rods, 11-pressing plates, 12-flexible plate protection plates, 13-component protection plates, 14-solder paste needle tubes, 15-mounting seats, 16-third screws, 17-fourth screws, 18-fifth screws, 19-pins, 20-pressing strips, 21-PCB (printed circuit board), 22-multiple flexible plates of devices and 23-clamping bases.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Example 1

Referring to fig. 1, fig. 1 is a schematic structural diagram illustrating a multi-flexible-plate laser welding tool for an optical communication module according to an embodiment of the present invention.

The applicant researches and discovers that the existing welding modes of the flexible board and the PCB of the device are mainly divided into two types, one type is a patch type, for example, a patent with the application number of CN201910567963.2, the SMT patch mode is adopted, the PCB is firstly placed into a clamp to be fixed, then a patch mode is adopted to attach a flexible board pad on the PCB pad, but the mode can only realize the patch of a single flexible board and the PCB at present, and the welding of the flexible board and the PCB at first can bring difficulty to the welding of the flexible board and an optical device at the later stage, and the welding efficiency of the device and the flexible board at the later stage is reduced. Another type is a thermocompression bonding type, for example, patent application No. CN202011018455.8, which utilizes a fixture and a precision fine-tuning sliding table to effectively bond a pad of a flexible board of a device and a pad of a PCB board, and then uses a thermocompression bonding machine to achieve high-temperature bonding between the pads, but this method can only achieve welding between a single flexible board and the PCB board at present, and requires that the pads of the flexible board and the PCB board must be pads of conventional size, for welding between multiple flexible boards of the device and the PCB board, the fixture cannot simultaneously achieve accurate alignment between multiple pads, cannot achieve welding between small and dense pads of multiple flexible boards, easily causes continuous welding, and cannot effectively protect components on multiple flexible boards and the PCB board in the welding process.

Therefore, research and design on the multi-flexible-board and PCB welding tool clamp of the device have important significance on improving the welding quality and the welding efficiency of the multi-flexible-board of the optical communication module. Therefore, the application provides a many flexible boards of optical communication module laser welding frock and application method thereof, has advantages such as welding precision is high, the PCB board is fixed reliable, the many flexible boards of device and PCB board pad laminating are inseparable and good many flexible boards, components and parts protective capability, can effectively solve the problem that exists among the background art. The scheme is as follows:

referring to fig. 1 to 3, the multi-flexible-plate laser welding tool for the optical communication module according to the embodiment of the present invention includes a clamping base 23 disposed on a platform base 1 and a welding platform of a laser welding machine, in an implementation manner of the embodiment, referring to fig. 4, a screw mounting hole is disposed on the platform base 1 for fixedly connecting with the welding platform of the laser welding machine, a clamping groove is disposed thereon for mounting the clamping base 23, so that the clamping base 23 is circumferentially fixed on a plane and plays a foolproof role, and the clamping base 23 can be lifted up and taken out after being mounted on the plane base.

Further, as shown in fig. 5 and 12, a first clamping groove for accommodating the PCB 21 is formed at the front end of the clamping base 23, a second clamping groove for accommodating the multiple flexible boards 22 of the device is formed at the rear end of the clamping base 23, the front end of the clamping base 23 is a thicker end for being installed in the clamping groove of the platform base 1, and the rear end is a thinner end for facilitating manual holding when the clamping base 23 takes out the clamping groove of the platform base 1. It should be noted that, for different types of welding objects, for example, the multiple flexible boards of the a-type device and the a-type PCB, and the multiple flexible boards of the B-type device and the B-type PCB, the first slot and the second slot need to be adjusted according to their outer dimensions, so as to ensure stable and reliable fixing and ensure welding quality.

Further, in order to ensure that the multiple flexible boards 22 of the device and the PCB 21 are tightly attached, on the basis of the limiting and fixing of the clamping groove, a pressing plate 11 is arranged at the top of the rear end of the clamping base 23, as shown in fig. 6 and 7, one end of the pressing plate 11 is connected with the clamping base 23 in an overturning manner, the other end of the pressing plate is arranged in an inclined plane, a flexible board protection plate 12 is arranged on the inclined plane through a fourth screw 17 and made of a light-reflecting and heat-dissipating material and used for preventing the multiple flexible boards from being burned at high temperature during laser irradiation, the flexible board protection plate 12 is shown in fig. 9, the pressing plate 11 drives the flexible board protection plate 12 to overturn relative to the clamping base 23 and to stretch across the installation plane of the multiple flexible boards 22 of the device along the Y-axis direction, and enables the flexible board protection plate 12 to be abutted to one side of a pad of the multiple flexible boards 22 of the device; specifically, for the welding of the multiple flexible boards 22 and the bonding pads of the PCB board 21 of the device, the inclined plane arranged at the front end of the pressing plate 11 in this embodiment includes a first inclined plane and a second inclined plane with different slopes, and the first inclined plane and the second inclined plane incline towards the lower surface of the pressing plate 11 and are in a claw shape as a whole; the distance between the first inclined surface and the second inclined surface in the Y-axis direction is matched with the distance between the bonding pads of the device multi-flexible board 22. So that the pressure points of the first inclined surface and the second inclined surface can be pressed to the corresponding positions of the welding points of the multiple flexible boards 22 of the device; corresponding flexible board guard plate 12 also adjusts to first flexible board guard plate 12 and second flexible board guard plate 12, and the flexible board guard plate 12 of separately installing more is favorable to carrying out laser high temperature protection to the many flexible boards of different length. In addition, in order to avoid the interference between the pressing plate 11 and the multiple flexible plates 22 of the device, for example, the back surface of the inclined plane with a longer length is provided with a right-angle groove, and the right-angle groove is arranged corresponding to the multiple flexible plates 22 of the devices with different models, so that the multiple flexible plates 22 of the device are prevented from being damaged by the pressing plate 11 in the limiting process.

In one embodiment of the present embodiment, the specific structure of the pressing plate 11 is as follows: the clamping base 23 is characterized in that a bearing seat 9 with a step hole is arranged at the top of the rear end of the clamping base, a bearing 7 is arranged at the large end of the step hole in an interference fit mode, a first screw 3 is arranged in the step hole, and the first screw 3 penetrates through the bearing 7 along the step hole in the radial direction and is connected to the pressing plate 11. Further, a circular pad 8 having an inner circular hole is provided between the bearing 7 and the pressure plate 11, and the inner circular hole of the circular pad 8 is fixed between the bearing 7 and the pressure plate 11 by passing the first screw 3 therethrough.

Aiming at the requirement that the pressing point position of the pressing plate 11 needs to be adjusted for multiple flexible plates 22 of different devices so as to improve the pressing effect, the bearing seat 9 is provided with a waist hole along the Z-axis direction, the clamping base 23 is connected with the waist hole through the second screw 6, the waist hole can realize displacement adjustment of the bearing seat 9 through installation of the second screw 6, and then the adjustment of the pressing point position of the front end of the pressing plate 11 on the multiple flexible plates on the bearing seat 9 is realized.

In addition, the clamp plate 11 is close to the one end lower surface on inclined plane and is equipped with inhales nail 4, inhales nail 4 and through magnetization processing, and its one end is the screw thread end for be connected with the screw hole that corresponds on the clamp plate 11, the other end is the cylinder step, the position that clamping base 23 corresponds and inhales nail 4 is equipped with first magnet 5, and the cylinder step forms suction with inhaling the iron and increases the pressure of clamp plate 11 front end pressure point to many flexible boards, thereby makes the many flexible board 22 pads of device and PCB board 21 pad laminating inseparabler.

In order to conveniently and manually hold the pressing plate 11 and operate the opening and closing of the pressing plate 11, a handle rod 10 is arranged on one side of the pressing plate 11, and one end of the handle rod 10 is a threaded end and is used for being fixedly connected with a corresponding threaded hole in the pressing plate 11; the other end is a cylindrical end which is mainly convenient for manual holding.

Further, a pressing strip 20 is arranged at the top of the front end of the clamping base 23, the pressing strip 20 is shown in fig. 8, the pressing strip 20 is connected with the clamping base 23 in a turnover manner, a component protection plate 13 is arranged on the pressing strip through a fifth screw 18, and the component protection plate is made of a light-reflecting and heat-dissipating material and used for preventing components on the PCB 21 from being damaged by high temperature during laser irradiation; as shown in fig. 10, in an implementation manner of this embodiment, the component protection plate 13 has a bent portion near one end of the pad of the multi-flexible-board device 22, the pressing bar 20 is overturned by driving the component protection plate 13 relative to the clamping base 23, and spans the mounting plane of the PCB 21 along the X-axis direction, and the bent portion of the component protection plate 13 abuts against the other side of the pad of the multi-flexible-board device 22.

Specifically, a first boss with a threaded hole is arranged on the clamping base 23 and used for installing the pin 19; the batten 20 is magnetized, and one end of the batten is provided with a through hole for matching with the pin 19 and a threaded hole on the first boss to realize rotation, the pin 19 is shown in figure 11, one end of the pin is a combination of threads and a cylindrical rod body, the threaded end is used for matching with the threaded hole in the first boss, and the cylindrical rod body is in clearance fit with the through hole at one end of the batten 20; the other end of the pin 19 is a cylindrical boss, and a straight groove is formed in the boss and is beneficial to a screwdriver to screw in and out the pin 19. The pressing strip 20 is also provided with a screw hole for mounting a fifth screw 18, and is connected and fixed with the component protection plate 13 through the fifth screw 18; and a second magnet is arranged at the position of the clamping base 23 corresponding to the other end of the pressing strip 20 and forms a certain suction force with the pressing strip 20, so that the stability and reliability of the component protection plate 13 arranged on the pressing strip 20 are ensured.

The top of the front end of the clamping base 23 is also provided with a second boss with a threaded hole, the threaded hole is in threaded fit with a locking screw 2, and the locking screw 2 is in threaded fit with the threaded hole and stretches across the upper side of the PCB 21 along the X-axis direction. In one embodiment of this embodiment, one end of the locking screw 2 is a thread, and the other end is a rotation end, and the surface of the rotation end is treated with anti-slip treatment to prevent the locking screw 2 from slipping when screwing in and screwing out.

It should be noted that, for the situation that tin is not applied in advance, the tool of this embodiment further includes a solder paste needle tube 14 and a mounting seat 15, one end of the mounting seat 15 is connected with the laser welder, and the other end of the mounting seat has a mounting through hole for mounting the solder paste needle tube 14, and a lateral screw mounting hole is formed in the mounting seat for mounting a third screw 16, and the tube body of the solder paste needle tube 14 is fixed through the mounting through hole, so that the looseness and tightness control of the solder paste needle tube 14 can be realized by matching the third screw 16 and the screw mounting hole. The needle of the solder paste needle tube 14 extends to between the flexible board protection plate 12 and the component protection plate 13, so as to perform soldering.

The following description is provided for the use method of the tool without tin coating in advance, and specifically includes the following steps:

step one, placing the multi-flexible-board 22 and the PCB 21 of the device welded with the auxiliary bonding pad into a corresponding clamping groove of the clamping base, and tightly pushing the PCB 21 by using a locking screw 2;

turning the pressing strip 20 to a closed state, and adjusting the position of a component protection plate 13 on the pressing strip 20 to ensure that the component protection plate 13 can protect components on the PCB 21 and reserve a moving space for solder paste on a pin head of a solder paste needle tube 14 for a row soldering pan;

turning the pressing plate 11 to a closed state, and adjusting the position of the bearing seat 9 to enable the inclined plane of the pressing plate 11 to be pressed between the auxiliary bonding pads of the multiple flexible boards and the row bonding pads, so that the bonding pads of the multiple flexible boards are tightly attached to the bonding pads of the PCB 21;

fourthly, adjusting the position of a flexible plate protection plate 12 arranged on an inclined plane at the front end of a pressing plate 11, so that the flexible plate protection plate 12 can perform laser high-temperature protection on multiple flexible plates and reserve a moving space for a row of welding pads when solder paste is applied to a needle head of a solder paste needle tube 14;

and fifthly, mounting the solder paste needle tube 14 filled with solder paste in a solder paste needle tube 14 mounting seat 15 connected with a laser welding machine, connecting an air pressure control house on the laser welding machine at the tail part of the solder paste needle tube 14, locking the solder paste needle tube 14 by using a third screw 16, further, applying the solder paste, irradiating a laser focus on the multi-flexible-plate-row welding pad by operating the laser welding machine, welding the multi-flexible-plate-row welding pad with the PCB 21 welding pad, melting the solder paste on the multi-flexible-plate-row welding pad due to high temperature, flowing the solder paste to the PCB 21 welding pad attached with the multi-flexible-plate-row welding pad through a hole in the middle of the multi-flexible-plate-row welding pad, and thus realizing high-precision welding of the multi-flexible-plate-row welding pad and the PCB 21 welding pad.

It should be noted that, referring to fig. 13 to 19, the number and shape of the pressing points at the front end of the pressing plate 11 are not limited to the illustrated examples, and are adjusted according to the number and arrangement of the pads of the PCB 21 and the multiple flexible boards. The number and shape of the flexible board protection plates 12 are not limited to the illustrated examples, and the shape, size and number thereof are adjusted according to the shape of the flexible boards and the distribution of the bonding pads. The shape of the component protection plate 13 is not limited to the illustrated example, and the shape and size thereof are adjusted according to the distribution of the components and the pads on the PCB 21. The size, shape and clamping position of the clamping groove of the multi-flexible-plate device 22 in the clamping base 23 are adjusted along with the change of the size, shape, clamping position and placement mode of the multi-flexible-plate device 22. The size, shape and position of the clamping groove of the PCB 21 in the clamping base 23 can be adjusted along with the change of the size, shape, position and placing mode of the PCB 21. The design principle of the clamping groove of the PCB 21 is to avoid the interference between the components on the PCB 21 and the clamping base 23 and ensure that the clamping base 23 has enough supporting force and reliable limiting capability for the PCB 21.

In summary, the technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects: (1) the welding precision is high, the welding is realized on the jointed PCB bonding pad and the multiple flexible board bonding pads through laser focusing, the welding precision is high, and the problem that the welding of small and dense bonding pads cannot be realized through manual welding and hot-press welding is solved; (2) the PCB is reliably fixed, and the welding quality of a multi-flexible-board welding pad and a PCB welding pad of a device can be effectively guaranteed not to be influenced in the dynamic welding process by adopting a PCB fixing and clamping mode of tightly jacking the clamping groove and the locking screw; (3) the multi-flexible-board bonding pad of the device is tightly attached to the PCB bonding pad, and the multi-flexible-board bonding pad of the device is tightly and effectively combined with the PCB bonding pad by adopting a pressing plate pressure point pressing mode, an iron absorption mode and a nail absorption pressing mode; (4) the good many flexible boards of many, components and parts protective capability through the application of flexible board guard plate and components and parts guard plate, has effectually avoided the laser irradiation high temperature to damage the components and parts on many flexible boards of device and the PCB board.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a many flexible boards laser welding frock of optical communication module, is including setting up clamping base (23) and the welded platform of laser welder on platform base (1), its characterized in that, clamping base (23) front end shaping has the first draw-in groove of settling PCB board (21), and the rear end shaping has the second draw-in groove of settling many flexible boards of device (22), wherein:

a pressing plate (11) is arranged at the top of the rear end of the clamping base (23), one end of the pressing plate (11) is connected with the clamping base (23) in a turnover mode, the other end of the pressing plate is arranged in an inclined plane, a flexible plate protection plate (12) is arranged on the inclined plane, the pressing plate (11) stretches across the upper portion of the multi-flexible-plate device (22) along the Y-axis direction relative to the clamping base (23) through driving the flexible plate protection plate (12) to turn over, and the flexible plate protection plate (12) is abutted to one side of a bonding pad of the multi-flexible-plate device (22);

clamping base (23) front end top is equipped with layering (20), layering (20) are connected with clamping base (23) upset, are provided with components and parts guard plate (13) on it, components and parts guard plate (13) are close to the pad one end of the many flexible boards of device (22) and have the portion of bending, layering (20) are through driving the upset of the relative clamping base (23) of components and parts guard plate (13), span in the mounting plane of PCB board (21) along X axle direction, and make the portion of bending of components and parts guard plate (13) butt to the pad opposite side of the many flexible boards of device (22).

2. The laser welding tool for the multiple flexible plates of the optical communication module as claimed in claim 1, wherein the inclined planes include a first inclined plane and a second inclined plane with different slopes, and the first inclined plane and the second inclined plane are inclined towards the lower surface of the pressure plate (11) and are wholly in a claw shape;

the distance between the first inclined surface and the second inclined surface in the Y-axis direction is matched with the distance between the bonding pads of the device multi-flexible board (22).

3. The laser welding tool for the multiple flexible plates of the optical communication module according to claim 2, wherein a bearing seat (9) with a stepped hole is arranged at the top of the rear end of the clamping base (23), a bearing (7) is arranged at the large end of the stepped hole through interference fit, a first screw (3) is arranged in the stepped hole, and the first screw (3) radially penetrates through the bearing (7) along the stepped hole and is connected to the pressing plate (11).

4. The laser welding tool for the multiple flexible plates of the optical communication module according to claim 3, wherein a waist hole is formed in the bearing seat (9) along the Z-axis direction, and the clamping base (23) is connected with the waist hole through a second screw (6).

5. The laser welding tool for the multiple flexible plates of the optical communication module according to claim 4, wherein a suction nail (4) is arranged on the lower surface of one end, close to the inclined surface, of the pressing plate (11), and a first suction iron (5) is arranged on the clamping base (23) in a position corresponding to the suction nail (4).

6. The laser welding tool for the multiple flexible plates of the optical communication module as claimed in claim 5, wherein a handle (10) is arranged on one side of the pressure plate (11).

7. The laser welding tool for the multiple flexible plates of the optical communication module as claimed in claim 6, wherein a first boss with a threaded hole is arranged on the clamping base (23), and one end of the pressing strip (20) is connected with the first boss through a pin (19).

8. The laser welding tool for the multiple flexible plates of the optical communication module as claimed in claim 7, wherein a second magnet is arranged at a position of the clamping base (23) corresponding to the other end of the pressing strip (20).

9. The laser welding tool for the multiple flexible plates of the optical communication module according to claim 8, wherein a second boss with a threaded hole is further arranged at the top of the front end of the clamping base (23), the threaded hole is in threaded fit with the locking screw (2), and the locking screw (2) is in threaded fit with the threaded hole and spans over the PCB (21) along the X-axis direction.

10. The use method of the optical communication module multi-flexible-plate laser welding tool is applied to the tool according to any one of claims 1 to 9, and is characterized by comprising the following steps of:

step one, placing a device multi-flexible board (22) and a PCB (21) which are welded with auxiliary bonding pads into corresponding clamping grooves of a clamping base, and tightly jacking the PCB (21) by using locking screws (2);

turning the pressing strip (20) to a closed state, and adjusting the position of a component protection plate (13) on the pressing strip (20) to ensure that the component protection plate (13) can protect components on the PCB (21) and reserve a moving space for solder paste feeding for a row of soldering lands;

turning the pressing plate (11) to a closed state, and adjusting the position of the bearing seat (9) to enable the inclined plane of the pressing plate (11) to be pressed between the auxiliary bonding pad of the multiple flexible boards and the row bonding pad, so that the bonding pads of the multiple flexible boards are tightly attached to the bonding pad of the PCB (21);

fourthly, adjusting the position of a flexible plate protection plate (12) arranged on the inclined plane at the front end of the pressing plate (11), so that the flexible plate protection plate (12) can perform laser high-temperature protection on multiple flexible plates and reserve a moving space for solder paste application on a row soldering pan;

and step five, applying solder paste, and operating a laser welding machine to enable the laser focus to irradiate the multi-flexible-board row welding pads to weld the multi-flexible-board row welding pads with the welding pads of the PCB (21).

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