CN219421196U - Secondary automatic welding device for PCBA welding spots of washing machine - Google Patents
Secondary automatic welding device for PCBA welding spots of washing machine Download PDFInfo
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- CN219421196U CN219421196U CN202223129949.0U CN202223129949U CN219421196U CN 219421196 U CN219421196 U CN 219421196U CN 202223129949 U CN202223129949 U CN 202223129949U CN 219421196 U CN219421196 U CN 219421196U
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Abstract
The utility model provides a secondary automatic welding device for PCBA welding spots of a washing machine, which comprises a bottom plate, a PCB tray and a steel mesh moving mechanism, wherein the bottom plate is arranged on the bottom plate; the PCB tray and the steel mesh moving mechanism are arranged on the bottom plate, and the steel mesh moving mechanism is arranged on one side of the PCB tray; the steel mesh moving mechanism comprises a coated stainless steel which is rotatably arranged, and the coated stainless steel is positioned above the PCB tray. The utility model can effectively solve the scrapping problem caused by abnormal welding quality (short circuit, welding leakage, inclination) of the needle seat; the problem that manual welding cannot be reworked can be effectively solved; meanwhile, the repair qualification rate of the fault board can be effectively improved.
Description
Technical Field
The utility model relates to the technical field of PCB welding, in particular to a secondary automatic welding device for PCBA welding spots of a washing machine.
Background
The SMT component paster process comprises the following steps: and opening holes at corresponding positions of the actual welding areas of the bonding pads on the tin-printed steel mesh according to the lead-out width and the solder mask windowing areas on the PCB, and correspondingly covering the printing on the PCB to finish the printing of the bonding pads. The display board of the washing machine is designed into a conductive film conducting structure, and is produced into a solder paste welding process, and a sheet-shaped needle seat is required to be welded on the display board. The welding fault of the needle seat after reflow soldering can only maintain simple abnormal conditions such as poor tin plating, short circuit and the like at present, and the manual welding needle seat needs higher welding skill for integral replacement, so that the hardware of the branch factories does not have maintenance conditions. And the plastic shell package cannot bear the high-temperature heating of the soldering iron, cannot be repaired and can only carry out the whole plate waste reporting treatment.
Therefore, the maintenance problem of the patch needle stand is always a great difficulty in production, and the needle stand welding failure leads to that the whole semi-finished product plate can only be scrapped for disposal due to no repair, so that certain cost is wasted.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model aims to provide a secondary automatic welding device for PCBA welding spots of a washing machine, so as to effectively solve the problems.
The technical scheme adopted for solving the technical problems is as follows:
a secondary automatic welding device for PCBA welding spots of a washing machine comprises a bottom plate, a PCB tray and a steel mesh moving mechanism; the PCB tray and the steel mesh moving mechanism are arranged on the bottom plate, and the steel mesh moving mechanism is arranged on one side of the PCB tray; the steel mesh moving mechanism comprises a coated stainless steel which is rotatably arranged, and the coated stainless steel is positioned above the PCB tray.
As a further improvement of the utility model: the steel mesh moving mechanism further comprises a bearing mounting seat, a rotating shaft and a coated stainless steel clamping piece; the both ends of rotation axis are all passed through the bearing mount pad sets up on the bottom plate, one side of rotation axis with the coating stainless steel fastener is connected, the below of coating stainless steel fastener sets up the coating stainless steel.
As a further improvement of the utility model: the stainless steel coating clamp is characterized in that a coating groove is formed in the stainless steel coating clamp, and the stainless steel coating is wrapped on the bottom surface of the coating groove.
As a further improvement of the utility model: the coated stainless steel comprises a coating part, a first attaching part, a second attaching part and a third attaching part; the first attaching part, the second attaching part and the third attaching part are respectively arranged on one side of the coating part; the coating portion corresponds to the coating groove, and the first attaching portion, the second attaching portion and the third attaching portion are respectively arranged in a coating mode with the edges of the coating groove.
As a further improvement of the utility model: the first attaching part, the second attaching part and the third attaching part are provided with perforations, and screw holes are formed in the edges of the coating grooves at positions corresponding to the perforations; the through hole and the screw hole are connected by a screw.
As a further improvement of the utility model: one side of the bearing mounting seat is provided with a bearing cover plate.
As a further improvement of the utility model: the two bearing mounting seats are connected through a cross beam.
As a further improvement of the utility model: the PCB tray comprises a tray bottom plate and a plurality of pressing blocks; the tray bottom plate is provided with irregular avoidance grooves, and the surrounding of the avoidance grooves is provided with the pressing blocks.
As a further improvement of the utility model: the PCB tray comprises 7 pressing blocks, and the 7 pressing blocks are arranged around the avoidance groove in a surrounding mode.
The welding method of the washing machine PCBA welding spot secondary automatic welding device, wherein the washing machine PCBA welding spot secondary automatic welding device is applied, and the method further comprises the following steps:
(1) Placing the PCBA board in a PCB tray with the inserted element facing downwards;
(2) Overturning the mesh coated with stainless steel, and then overlapping and tightly attaching the mesh with a needle seat bonding pad of the PCB;
(3) Uniformly coating the solder paste on a stainless steel-coated net sheet;
(4) The needle seat is lightly dipped on the solder paste, and the whole PCB is subjected to reflow soldering, so that the secondary tin soldering is completed.
Compared with the prior art, the utility model has the beneficial effects that:
1. the problem of scrapping caused by abnormal welding quality (short circuit, welding leakage, inclination) of the needle seat is effectively solved;
2. the problem that manual welding cannot be repaired is effectively solved;
3. the repair qualification rate of the fault board is effectively improved.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present utility model.
Fig. 2 is a schematic view of a structure of a PCB tray according to the present utility model.
Fig. 3 is a schematic view of the structure of the steel mesh moving mechanism of the utility model.
Fig. 4 is a schematic structural view of a coated stainless steel clip according to the present utility model.
Fig. 5 is a schematic view of the structure of the coated stainless steel of the present utility model.
Fig. 6 is a schematic view of a part of the structure of the steel mesh moving mechanism of the utility model.
Reference numerals illustrate:
1-a bottom plate; 2-a PCB tray; 3-a steel mesh moving mechanism; 31-coated stainless steel; 32-a bearing mount; 33-a rotation axis; 34-coating stainless steel clamping pieces; 341-coating a tank; 311-coating part; 312-a first fitting portion; 313-a second bonding portion; 314-a third fitting portion; 315-transmission control; 342-screw holes; 35-a bearing cover plate; 36-a cross beam; 21-a tray floor; 22-briquetting; 211-avoiding grooves.
Detailed Description
The utility model will now be further described with reference to the accompanying drawings and examples:
embodiment one:
the embodiment provides a secondary automatic welding device for PCBA welding spots of a washing machine, which is shown in figures 1-6, wherein the secondary automatic welding device comprises a bottom plate 1, a PCB tray 2 and a steel mesh moving mechanism 3; the PCB tray 2 and the steel mesh moving mechanism 3 are arranged on the bottom plate 1, and the steel mesh moving mechanism 3 is arranged on one side of the PCB tray 2; the steel mesh moving mechanism 3 comprises a coated stainless steel 31 which is rotatably arranged, and the coated stainless steel 31 is positioned above the PCB tray 2.
In this embodiment, the bottom plate 1 is used for fixing the parts of other mechanisms, and when welding, the PCB is fixed through the PCB tray 2, and then the coating stainless steel 31 of the steel mesh moving mechanism 3 is used for coating and welding the position where the upper PCB is required to be welded locally, so that the PCB tray 2 can be detachably arranged, and the position of the PCB tray 2 can be adjusted according to the local welding requirements of different PCBs. The steel mesh moving mechanism 3 is used for performing secondary welding on a partial position with poor welding after primary welding, the stainless steel 31 is coated to align the partial position needing secondary welding, the needle seat on the position is removed, soldering tin on the soldering pad is cleaned, the soldering paste is printed on the needle seat on the PCB board by using a tool, then a new patch needle seat material is taken to be attached to the soldering pad after the soldering paste is printed, and repair and utilization are realized through secondary reflow soldering. The stainless steel 31 coated on the steel mesh moving mechanism 3 is a steel mesh and is used for assisting in accurately printing and subsequent welding of solder paste on the needle seat.
Steel mesh (steel), i.e. SMT templates (SMT steel), is a special mould for SMT. Its primary function is to aid in the deposition of solder paste, with the aim of transferring an accurate amount of solder paste to an accurate location on an empty PCB. The SMT surface technology, which is named Surface Mount Technology and is called SMT for short, comprises printing technology, mounting technology, reflow soldering technology and the like. And opening holes at corresponding positions of the actual welding areas of the bonding pads on the tin-printed steel mesh according to the lead-out width and the solder mask windowing areas on the PCB, and correspondingly covering the printing on the PCB to finish the printing of the bonding pads.
Continuing to describe the steel mesh moving mechanism 3 in further detail in this embodiment, as shown in fig. 3, the steel mesh moving mechanism 3 further includes a bearing mount 32, a rotating shaft 33, and a coated stainless steel clip 34; both ends of the rotating shaft 33 are arranged on the bottom plate 1 through the bearing mounting seats 32, one side of the rotating shaft 33 is connected with the coating stainless steel clamping piece 34, and the coating stainless steel 31 is arranged below the coating stainless steel clamping piece 34.
In this embodiment, the bearing mounting base 32 is used for installing the rotation axis 33, and the coating stainless steel clamping piece 34 is used for installing the coating stainless steel 31, through the cooperation of rotation axis 33 and coating stainless steel clamping piece 34, can make coating stainless steel 31 rotate to conveniently aim at the PCB board, upwards rotate when changing the PCB board can, simultaneously, this setting can overturn repeatedly and reprint.
In this embodiment, in order to facilitate the use of the coated stainless steel 31, the coating of the solder paste and the subsequent welding are facilitated, a coating groove 341 is disposed on the coated stainless steel clamping member 34, and the coated stainless steel 31 is wrapped and disposed on the bottom surface of the coating groove 341. Thus, the coated stainless steel clip 34 does not completely cover the coated stainless steel 31, which affects the normal use of the coated stainless steel 31.
Continuing with the further detailed description of the coated stainless steel 31 in this embodiment, as shown in fig. 5, the coated stainless steel 31 includes a coating portion 311, a first bonding portion 312, a second bonding portion 313, and a third bonding portion 314; the first bonding part 312, the second bonding part 313 and the third bonding part 314 are respectively arranged at one side of the coating part 311; the coating portion 311 is disposed corresponding to the coating groove 341, and the first bonding portion 312, the second bonding portion 313, and the third bonding portion 314 are respectively disposed to cover the edges of the coating groove 341. In order to ensure stable fitting of the coated stainless steel 31 and the coating groove 341, the first fitting portion 312, the second fitting portion 313 and the third fitting portion 314 are provided to wrap the edge portion of the coating groove 341. Because the coating groove 341 is formed at the position of the clamping piece near the lower side, the coating groove 341 is in an elongated strip structure near the three sides of the PCB board, so that the three sides can be smoothly covered by the first, second and third attaching portions 314, the whole coated stainless steel 31 is stabilized without deviation in operation, and the falling of the steel mesh is avoided, wherein the coating portion 311 is used for the coating and welding operation.
In order to further stabilize the coated stainless steel 31 from being deviated or falling during operation, as shown in fig. 5, the first, second and third bonding portions 312, 313, 314 have perforations 315, and the edges of the coating groove 341 are provided with screw holes 342 at positions corresponding to the perforations 315; the through hole and the screw hole 342 are connected by a screw. In this way, the corresponding openings provided by the edges of the coating groove 341, the first bonding portion 312, the second bonding portion 313, and the third bonding portion 314 are fixed by the screw holes, and the opening direction of the edges of the coating groove 341 is parallel to the coating portion 311, so that the stabilizing effect of the coated stainless steel 31 can be further improved as compared with the case where the openings are vertically arranged.
Further, as shown in fig. 1, in order to improve the stability of the connection between the bearing mount 32 and the rotating shaft 33, a bearing cover 35 is provided on one side of the bearing mount 32.
Further, as shown in fig. 1 and fig. 6, in order to further enhance the stability of the positions of the two bearing mounting seats 32, to avoid the bearing mounting seats 32 from being deviated from the rotation shaft 33 during the mounting, the two bearing mounting seats 32 are connected by the cross beam 36. Like this, the both ends of two bearing mount pads 32 all are through crossbeam 36 fixed connection, have guaranteed that two bearing mount pads 32 are parallel arrangement, have guaranteed rotation axis 33 and PCB board tray 2 parallel arrangement, avoid influencing the coating and welded accuracy.
Continuing to describe the PCB board tray 2 in further detail in this embodiment, as shown in fig. 1, the PCB board tray 2 includes a tray bottom plate 21 and a plurality of press blocks 22; the tray bottom plate 21 is provided with an irregular avoidance groove 211, and the periphery of the avoidance groove 211 is provided with the pressing block 22. The pressing block 22 is provided to further fix the PCB to the tray chassis 21. The avoiding groove 211 is provided to avoid the welded qualified components of the welded part of the PCB board, so as to avoid damaging the components and ensure that the PCB board can be placed horizontally during welding. The pressing block 22 can compress and fix and release the compression and fixation of the PCB board through rotation.
In one embodiment of the present utility model, the PCB tray 2 includes 7 pressing blocks 22, and the 7 pressing blocks 22 are disposed around the avoidance groove 211 in a surrounding manner.
Embodiment two:
the embodiment provides a welding method of a washing machine PCBA welding spot secondary automatic welding device, wherein the washing machine PCBA welding spot secondary automatic welding device is applied, and the method further comprises the following steps:
(1) Placing the PCBA board in the PCB tray 2 with the inserted component facing downwards; the placement process is carried out gently, so that the surface interference between the patch element and the surface of the PCB tray is avoided, and the damage of the device is avoided;
(2) Overturning the mesh coated with stainless steel, and then overlapping and tightly attaching the mesh with a needle seat bonding pad of the PCB; this process requires careful fitting.
(3) Uniformly coating the solder paste on a stainless steel-coated net sheet; a scraper can be used for coating by being stuck with solder paste; at this time, a layer of coated solder paste is formed on the pin seat bonding pad of the PCB.
(4) The needle seat is lightly dipped on the solder paste, and the whole PCB is subjected to reflow soldering, so that the secondary tin soldering is completed. In the process, tweezers can be used for lightly dipping the needle seat on the solder paste, and then the whole display panel is subjected to reflow soldering so as to realize secondary tin soldering.
In this embodiment, the SMT (surface mount technology) production process of a PCB (printed circuit board) is mainly divided into lead and lead-free soldering, and the main process steps include: step 1, printing solder paste; step 2, automatically attaching a patch; step 3, reflow soldering; and 4, an AOI detection procedure.
The main difference between the lead-free and lead-free soldering processes is that different solder pastes are used, the lead-free solder paste is used in the lead-free process, and the main metal components in the solder paste are as follows: 63% of tin, 37% of lead and 183% of solder melting point of solder paste; the lead-free process uses lead-free solder paste, and the main metal components in the solder paste are as follows: 96.5% of tin, 3% of silver and 0.5% of copper. The welding melting point of the solder paste is 217 ℃, the temperature required for fully melting and wetting the solder paste is more than 220 ℃ for 30-60S, the general highest temperature is 230-250 ℃, and the requirements on the PCB are different due to different welding temperature requirements.
The main functions of the utility model are as follows: the automatic repair welding bad fixture can effectively solve the quality problems of short circuit, missing welding, non-tinning, welding inclination and the like of patch welding, and realizes automatic secondary online repair. Through setting up the printing frock of local steel mesh, get rid of the needle file on the fault board again, soldering tin clean up on the pad uses frock to print fine solder paste in needle file department on the PCB board, then gets a new paster needle file material and pastes on the pad after printing the solder paste, and the secondary passes the reflow soldering and welds and realize repairing the utilization. The steel mesh adopts a local steel mesh structure, so that the secondary welding quality can be effectively ensured, the repeated repair times are reduced, and the production efficiency reduction caused by repair is avoided.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In view of the above, after reading the present document, those skilled in the art should make various other corresponding changes without creative mental effort according to the technical scheme and the technical conception of the present utility model, which are all within the scope of the present utility model.
Claims (9)
1. The secondary automatic welding device for the PCBA welding spots of the washing machine is characterized by comprising a bottom plate, a PCB tray and a steel mesh moving mechanism; the PCB tray and the steel mesh moving mechanism are arranged on the bottom plate, and the steel mesh moving mechanism is arranged on one side of the PCB tray; the steel mesh moving mechanism comprises a coated stainless steel which is rotatably arranged, and the coated stainless steel is positioned above the PCB tray.
2. The secondary automatic welding device for PCBA welding spots of a washing machine according to claim 1, wherein the steel mesh moving mechanism further comprises a bearing mounting seat, a rotating shaft and a coated stainless steel clamping piece; the both ends of rotation axis are all passed through the bearing mount pad sets up on the bottom plate, one side of rotation axis with the coating stainless steel fastener is connected, the below of coating stainless steel fastener sets up the coating stainless steel.
3. The secondary automatic welding device for PCBA welding spots of a washing machine according to claim 2, wherein a coating groove is formed in the coated stainless steel clamping piece, and the coated stainless steel is wrapped on the bottom surface of the coating groove.
4. A washing machine PCBA solder joint secondary automation welding device according to claim 3, wherein the coated stainless steel comprises a coating portion, a first bonding portion, a second bonding portion and a third bonding portion; the first attaching part, the second attaching part and the third attaching part are respectively arranged on one side of the coating part; the coating portion corresponds to the coating groove, and the first attaching portion, the second attaching portion and the third attaching portion are respectively arranged in a coating mode with the edges of the coating groove.
5. The secondary automatic welding device for PCBA welding spots of a washing machine according to claim 4, wherein the first attaching part, the second attaching part and the third attaching part are provided with perforations, and the edges of the coating groove are provided with screw holes corresponding to the positions of the perforations;
the through hole and the screw hole are connected by a screw.
6. The secondary automatic welding device for PCBA welding spots of a washing machine according to claim 2, wherein a bearing cover plate is arranged on one side of the bearing mounting seat.
7. The secondary automatic welding device for PCBA welding spots of a washing machine according to claim 2, wherein the two bearing mounts are connected by a cross beam.
8. The secondary automatic welding device for PCBA welding spots of a washing machine according to claim 1, wherein the PCB tray comprises a tray bottom plate and a plurality of pressing blocks; the tray bottom plate is provided with irregular avoidance grooves, and the surrounding of the avoidance grooves is provided with the pressing blocks.
9. The secondary automatic welding device for PCBA welding spots of a washing machine according to claim 8, wherein the PCB tray comprises 7 press blocks, and the 7 press blocks are surrounded and arranged around the avoidance groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223129949.0U CN219421196U (en) | 2022-11-24 | 2022-11-24 | Secondary automatic welding device for PCBA welding spots of washing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223129949.0U CN219421196U (en) | 2022-11-24 | 2022-11-24 | Secondary automatic welding device for PCBA welding spots of washing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219421196U true CN219421196U (en) | 2023-07-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223129949.0U Active CN219421196U (en) | 2022-11-24 | 2022-11-24 | Secondary automatic welding device for PCBA welding spots of washing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219421196U (en) |
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2022
- 2022-11-24 CN CN202223129949.0U patent/CN219421196U/en active Active
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