Online selective PCB tin brushing machine

Abstract

The utility model discloses an online selective PCB tin brushing machine which comprises a base, a tin brushing mechanism and a conveying mechanism, and the tin brushing mechanism and the conveying mechanism are both fixedly connected to the base. The tin brushing mechanism comprises an X-axis linear transmission module fixedly connected to the base, an X-axis servo motor used for controlling the X-axis linear transmission module is fixedly connected to the X-axis linear transmission module, an X-axis drag chain is installed on the lower side of the X-axis linear transmission module, and a Y-axis linear transmission module is installed at the output end of the X-axis linear transmission module. The conveying mechanism can automatically and accurately position the target PCB, the tin brushing mechanism can automatically and accurately brush tin slag on the target PCB, the tin brushing efficiency is effectively improved, the operation stability of the tin brushing mechanism and the conveying mechanism is high, and the consistency of the tin brushing effect of the tin brushing machine is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of PCB board processing, in particular to an online selective PCB board tinning machine. Background Art

[0002] PCB is an important electronic component, a support for electronic components, and a carrier for electrical connection of electronic components. When installing electronic components on PCB, it is necessary to use soldering to solder the electronic components on PCB. After soldering, some solder slag will be left on the back of the PCB. If the solder slag left on the back of the PCB is not removed, it will affect the overall use function of the PCB and seriously affect the quality of the product. Therefore, it is necessary to remove the tin slag from the PCB after soldering. The existing method of removing tin slag from PCB is to use workers to manually or equipment to brush the tin slag (i.e. blind brushing). The above-mentioned methods of brushing tin slag are inefficient and the consistency of the brushing effect is poor. Utility Model Content

[0003] The purpose of the utility model is to provide an online selective PCB board tin brushing machine to solve the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] The utility model provides an online selective PCB board tinning machine, comprising a base, a tinning mechanism and a conveying mechanism, wherein the tinning mechanism and the conveying mechanism are both fixedly connected to the base;

[0006] The tin brushing mechanism includes an X-axis linear transmission module fixedly connected to a base, an X-axis servo motor for controlling the X-axis linear transmission module fixedly connected to the X-axis linear transmission module, an X-axis drag chain installed on the lower side of the X-axis linear transmission module, a Y-axis linear transmission module installed at the output end of the X-axis linear transmission module, a Y-axis servo motor for controlling the Y-axis linear transmission module fixedly connected to the Y-axis linear transmission module, a Z-axis linear transmission module installed on the Y-axis linear transmission module, a Z-axis servo motor for controlling the Z-axis linear transmission module fixedly connected to the Z-axis linear transmission module, a tin slag brush installed at the output portion of the Z-axis linear transmission module, and a tin slag collection box corresponding to the tin slag brush installed at the output portion of the Z-axis linear transmission module.

[0007] Furthermore, the conveying mechanism includes two track fixing seats fixedly connected to the upper side of the base, the upper sides of the two track fixing seats are fixedly connected to the same fixed conveying track, the vertical side walls of the two track fixing seats are fixedly connected to the track width adjustment guide rods, and the two track width adjustment guide rods are movably sleeved with a movable plate, the track fixing seats are equipped with a track width adjustment ball screw, the movable plate is provided with a screw hole, and the track width adjustment ball screw passes through the movable plate through the screw hole, the upper sides of the two movable plates are fixedly connected to the same adjustment conveying track, the adjustment conveying track is fixedly connected to the track width adjustment stepping motor, a track width adjustment synchronous belt is arranged between the track width adjustment ball screw and the track width adjustment stepping motor, a product conveyor is installed on the side of the adjustment conveying track opposite to the fixed conveying track, a product positioning mechanism is connected to the fixed conveying track and the adjustment conveying track, and multiple product clamping mechanisms are installed on the fixed conveying track and the adjustment conveying track.

[0008] Furthermore, the product positioning mechanism includes a product blocking cylinder fixedly connected to a fixed conveying track, an output end of the product blocking cylinder is fixedly connected to a product blocking block, both the fixed conveying track and the adjustable conveying track are fixedly connected to a product in place cylinder, and an output end of the product in place cylinder is fixedly connected to a product in place positioning block.

[0009] Furthermore, the product conveyor includes two product conveying stepper motors respectively fixedly connected to the fixed conveying track and the adjustable conveying track. Two driven wheels are rotatably installed on the fixed conveying track and the adjustable conveying track. A transmission chain is wound around the two driven wheels, and the transmission chain is wound around the output shaft of the product conveying stepper motor.

[0010] Furthermore, the product pressing mechanism comprises a product pressing cylinder, and an output end of the product pressing cylinder is fixedly connected to a product pressing plate.

[0011] Furthermore, the base includes a welding frame, the upper side of the welding frame is fixedly connected to a frame bottom plate, the tin brushing mechanism and the conveying mechanism are both fixedly connected to the frame bottom plate, the upper side of the frame bottom plate is fixedly connected to an upper cover, the tin brushing mechanism and the conveying mechanism are both located inside the upper cover, a flip door is hinged on the front side of the upper cover, a plexiglass plate is embedded on the flip door, a button panel is installed on the upper cover, a three-color lamp is installed on the top of the upper cover, and a display and a keyboard are installed on the right side of the upper cover.

[0012] Furthermore, the side walls on the front and rear sides of the flip door are symmetrically fixedly connected with two mounting plates, two cross bars are symmetrically fixedly connected between the two mounting plates on the same side, the two cross bars are movablely sleeved with the same magnetic plate, and the magnetic plate on the rear side close to the plexiglass plate is fixedly connected with a plurality of cleaning strips, and the polarities of the two opposite sides of the two magnetic plates are opposite.

[0013] Furthermore, adjustable foot cups are fixedly connected to the four corners of the bottom of the welding frame, and a plurality of universal casters are fixedly connected to the bottom of the welding frame.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model provides a base, a tin brushing mechanism and a conveying mechanism. When tinning, firstly, the fixed conveying track and the distance between the conveying tracks are adjusted according to the size of the target PCB board, so that the target PCB board can be smoothly transmitted on the transmission chain. The target PCB board is transmitted through the transmission chain at the front station. The target PCB board is driven by friction with the transmission chain. When the target PCB board reaches the product in-place positioning block, the transmission chain stops conveying. Subsequently, multiple product pressing plates are driven by the product pressing cylinder to descend and press the target PCB board. The product blocking block is driven by the product blocking cylinder to descend and block the next target PCB board to avoid collision. After the above actions are completed, the X-axis servo motor, the Y-axis servo motor and the Z-axis servo motor are driven to move the target PCB board to the next target PCB board. The servo motor drives the X-axis linear transmission module, the Y-axis linear transmission module and the Z-axis linear transmission module to move respectively. The X-axis linear transmission module, the Y-axis linear transmission module and the Z-axis linear transmission module can drive the tin slag brush and the tin slag collection box to move in the X / Y / Z axis. The tin slag brush and the tin slag collection box remove and collect the tin slag on the target PCB board. The tin brushing position will be designed and entered into the operating system in advance by the programmer. The conveying mechanism can automatically and accurately locate the target PCB board. The tin brushing mechanism can fully automatically and accurately brush the tin slag on the target PCB board, which effectively improves the efficiency of tin brushing. The tin brushing mechanism and the conveying mechanism have high stability in operation, which effectively improves the consistency of the tin brushing effect of the tin brushing machine.

[0016] 2. The utility model is equipped with a flip door, plexiglass plate, mounting plate, cross bar, magnetic plate and cleaning strip. When in use, the flip door can be opened to facilitate maintenance of the structure in the upper cover. The plexiglass plate is convenient for observing the interior of the upper cover. When the interior of the plexiglass plate is blurred due to dirt adhered to it after long-term use, the magnetic plate located outside is pushed, and the magnetic plate drives the internal magnetic plate to move. The cleaning strip on the magnetic plate can clean the dirt on the plexiglass plate. The operation is simple and convenient. The plexiglass plate can be cleaned at any time without opening the flip door, which effectively improves the convenience of cleaning the tin brushing machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 for Figure 1 Schematic diagram of the connection structure of the middle base, the tin brushing mechanism and the conveying mechanism;

[0019] Figure 3 for Figure 1 Structural diagram of the middle tin brushing mechanism;

[0020] Figure 4 for Figure 1 The structural diagram of the conveying mechanism;

[0021] Figure 5 for Figure 1 Schematic diagram of the structure of the middle flip door;

[0022] Figure 6 for Figure 5 A schematic diagram of the structure in another direction;

[0023] Figure 7 for Figure 6 Schematic diagram of the structure of the two magnetic plates.

[0024] In the figure: 101, welding rack; 102, rack bottom plate; 103, upper cover; 104, flip door; 105, organic glass plate; 106, button panel; 107, three-color light; 108, display; 109, keyboard; 301, X-axis linear transmission module; 302, X-axis servo motor; 303, X-axis drag chain; 304, Y-axis linear transmission module; 305, Y-axis servo motor; 306, Z-axis linear transmission module; 307, Z-axis servo motor; 308, tin slag brush; 309, tin slag collection box; 401, track fixing seat; 402, fixed conveying track; 403, track adjustment Wide guide rod; 404, moving plate; 405, track width adjustment ball screw; 406, adjust conveying track; 407, track width adjustment stepper motor; 408, track width adjustment synchronous belt; 501, product blocking cylinder; 502, product blocking block; 503, product in place cylinder; 504, product in place positioning block; 601, product conveying stepper motor; 602, driven wheel; 603, transmission chain; 701, product clamping cylinder; 702, product clamping plate; 801, mounting plate; 802, cross bar; 803, magnet plate; 804, cleaning strip; 901, adjustable foot cup; 902, universal caster. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-7 The utility model provides an online selective PCB board tinning machine, comprising a base, a tinning mechanism and a conveying mechanism, wherein the tinning mechanism and the conveying mechanism are both fixedly connected to the base;

[0027] The tin brushing mechanism includes an X-axis linear transmission module 301 fixedly connected to a base, an X-axis servo motor 302 for controlling the X-axis linear transmission module 301 is fixedly connected to the X-axis linear transmission module 301, an X-axis drag chain 303 is installed on the lower side of the X-axis linear transmission module 301, a Y-axis linear transmission module 304 is installed at the output end of the X-axis linear transmission module 301, a Y-axis servo motor 305 for controlling the Y-axis linear transmission module 304 is fixedly connected to the Y-axis linear transmission module 304, a Z-axis linear transmission module 306 is installed on the Y-axis linear transmission module 304, a Z-axis servo motor 307 for controlling the Z-axis linear transmission module 306 is fixedly connected to the Z-axis linear transmission module 306, a tin slag brush 308 is installed at the output portion of the Z-axis linear transmission module 306, and a tin slag collection box 309 corresponding to the tin slag brush 308 is installed at the output portion of the Z-axis linear transmission module 306.

[0028] In the above embodiment, when brushing tin, firstly, the distance between the fixed conveying track 402 and the adjusted conveying track 406 is adjusted according to the size of the target PCB board, so that the target PCB board can be smoothly transmitted on the transmission chain 603, and the target PCB board is transmitted through the transmission chain 603 at the front station. The target PCB board is transmitted by friction with the transmission chain 603. When the target PCB board reaches the product in place positioning block 504, the transmission chain 603 stops conveying, and then multiple product clamping plates 702 are driven by the product clamping cylinder 701 to descend and clamp the target PCB board, and the product blocking block 502 is driven by the product blocking cylinder 501 to descend and block the next target PCB board to avoid collision. After the above actions are completed, the X-axis servo motor 302, the Y-axis servo motor 305 and the Z-axis servo motor 307 respectively drive the X-axis linear transmission module 301, the Y-axis linear transmission module 304 and the Z-axis linear transmission module 30 6 movement, the X-axis linear transmission module 301, the Y-axis linear transmission module 304 and the Z-axis linear transmission module 306 can drive the tin slag brush 308 and the tin slag collection box 309 to move in the X / Y / Z axes, the tin slag brush 308 and the tin slag collection box 309 remove the tin slag on the target PCB board, the conveying mechanism can automatically and accurately position the target PCB board, and the tin brushing mechanism can fully automatically and accurately brush the tin slag on the target PCB board, which effectively improves the efficiency of tin brushing, and the tin brushing mechanism and the conveying mechanism operate stably and highly, which effectively improves the consistency of the tin brushing effect of the tin brushing machine; after the above actions are completed, the multiple product clamping plates 702 are driven by the product clamping cylinder 701 to rise and release the target PCB board, and the product blocking block 502 is driven by the product blocking cylinder 501 to rise and release the target PCB board, and the target PCB board is transmitted to the next station through friction with the transmission chain 603.

[0029] The conveying mechanism includes two track fixing seats 401 fixedly connected to the upper side of the base, the upper sides of the two track fixing seats 401 are fixedly connected to the same fixed conveying track 402, the vertical side walls of the two track fixing seats 401 are fixedly connected to track width adjustment guide rods 403, the two track width adjustment guide rods 403 are movably sleeved with moving plates 404, the track fixing seats 401 are equipped with track width adjustment ball screws 405, the moving plates 404 are provided with screw holes, the track width adjustment ball screws 405 pass through the moving plates 404 through the screw holes, and the two moving The upper side of the plate 404 is fixedly connected to the same adjusting conveying track 406, to which a track width adjusting stepping motor 407 is fixedly connected, and a track width adjusting synchronous belt 408 is arranged between the track width adjusting ball screw 405 and the track width adjusting stepping motor 407, and a product conveyor is installed on the side of the adjusting conveying track 406 opposite to the fixed conveying track 402, and a product positioning mechanism is connected to the fixed conveying track 402 and the adjusting conveying track 406, and a plurality of product clamping mechanisms are installed on both the fixed conveying track 402 and the adjusting conveying track 406.

[0030] In the above embodiment, the track width adjustment stepper motor 407 drives the track width adjustment ball screw 405 to rotate through the track width adjustment synchronous belt 408, and drives the movable plate 404 to move through the threaded cooperation between the track width adjustment ball screw 405 and the movable plate 404. The movable plate 404 drives the adjustment conveying track 406 to move, so that the distance between the adjustment conveying track 406 and the fixed conveying track 402 can be adjusted.

[0031] The product positioning mechanism includes a product blocking cylinder 501 fixedly connected to the fixed conveying track 402, the output end of the product blocking cylinder 501 is fixedly connected to the product blocking block 502, the fixed conveying track 402 and the adjustment conveying track 406 are both fixedly connected to a product in-place cylinder 503, the output end of the product in-place cylinder 503 is fixedly connected to a product in-place positioning block 504, when in use, the product in-place cylinder 503 controls the product in-place positioning block 504 to move downward, when the PCB board contacts the product in-place positioning block 504, it indicates that the PCB board is in place, and the set product blocking block 502 is driven by the product blocking cylinder 501 to descend to block the next target PCB board, thereby avoiding collision.

[0032] The product conveyor includes two product conveying stepper motors 601 respectively fixedly connected to the fixed conveying track 402 and the adjustable conveying track 406. Two driven wheels 602 are rotatably installed on the fixed conveying track 402 and the adjustable conveying track 406. A transmission chain 603 is wound around the two driven wheels 602. The transmission chain 603 is wound around the output shaft of the product conveying stepper motor 601. When in use, the product conveying stepper motor 601 drives the transmission chain 603 to run, and the transmission chain 603 conveys the PCB board through the friction resistance between the PCB board and the PCB board.

[0033] The product pressing mechanism includes a product pressing cylinder 701, and the output end of the product pressing cylinder 701 is fixedly connected to a product pressing plate 702. When in use, the product pressing cylinder 701 can control the product pressing plate 702 to move up and down, thereby being able to loosen or press the PCB board.

[0034] The base includes a welding frame 101, the upper side of the welding frame 101 is fixedly connected to a frame bottom plate 102, the tin brushing mechanism and the conveying mechanism are both fixedly connected to the frame bottom plate 102, the upper side of the frame bottom plate 102 is fixedly connected to an upper cover 103, the tin brushing mechanism and the conveying mechanism are both located in the upper cover 103, the front side of the upper cover 103 is hinged with a flip door 104, the flip door 104 is embedded with a plexiglass plate 105, a button panel 106 is installed on the upper cover 103, a tricolor lamp 107 is installed on the top of the upper cover 103, and a display 108 and a keyboard 109 are installed on the right side of the upper cover 103.

[0035] The side walls on the front and rear sides of the flip door 104 are symmetrically fixedly connected to two mounting plates 801, and two cross bars 802 are symmetrically fixedly connected between the two mounting plates 801 on the same side. The two cross bars 802 are movably sleeved with the same magnetic plate 803, and the magnetic plate 803 on the rear side close to the side of the plexiglass plate 105 is fixedly connected to multiple cleaning strips 804, and the polarities of the two magnetic plates 803 on opposite sides are opposite.

[0036] In the above embodiment, when in use, the provided flip door 104 can be opened to facilitate maintenance of the structure inside the upper cover 103, and the provided organic glass plate 105 is convenient for observing the interior of the upper cover 103. When the interior of the organic glass plate 105 becomes blurred due to dirt adhered to it after long-term use, the external magnetic plate 803 is pushed, and the magnetic plate 803 drives the internal magnetic plate 803 to move. The cleaning strip 804 on the magnetic plate 803 can clean the dirt on the organic glass plate 105. The operation is simple and convenient, and the organic glass plate 105 can be cleaned at any time without opening the flip door 104, which effectively improves the convenience of cleaning the tin brush machine.

[0037] The four corners of the bottom of the welding frame 101 are fixedly connected with adjustable feet 901, and the bottom of the welding frame 101 is fixedly connected with a plurality of universal casters 902. The adjustable feet 901 and the universal casters 902 can improve the stability of the base placement and the convenience of movement.

[0038] Working principle: When brushing tin, first adjust the distance between the fixed conveying track 402 and the adjusted conveying track 406 according to the size of the target PCB board, so that the target PCB board can be smoothly transmitted on the transmission chain 603, and the target PCB board is transmitted through the transmission chain 603 at the front station. The target PCB board is transmitted by friction with the transmission chain 603. When the target PCB board reaches the product in place positioning block 504, the transmission chain 603 stops conveying, and then multiple product clamping plates 702 are driven by the product clamping cylinder 701 to descend and clamp the target PCB board, and the product blocking block 502 is driven by the product blocking cylinder 501 to descend and block the next target PCB board to avoid collision; after the above actions are completed, the X-axis servo motor 302, the Y-axis servo motor 305 and the Z-axis servo motor 307 respectively drive the X-axis linear transmission module 301, the Y-axis linear transmission module 304 and the Z-axis linear transmission module 306 to move, and the X-axis linear transmission module 3 01. The Y-axis linear transmission module 304 and the Z-axis linear transmission module 306 can drive the tin slag brush 308 and the tin slag collection box 309 to move in the X / Y / Z axes. The tin slag brush 308 and the tin slag collection box 309 remove and collect the tin slag on the target PCB board. The tin brushing position will be designed and entered into the operating system in advance by the programmer. The conveying mechanism can automatically and accurately locate the target PCB board. The tin brushing mechanism can fully automatically and accurately brush the tin slag on the target PCB board, which effectively improves the efficiency of tin brushing. The tin brushing mechanism and the conveying mechanism operate stably and highly, which effectively improves the consistency of the tin brushing effect of the tin brushing machine. After the above actions are completed, multiple product clamping plates 702 are driven by the product clamping cylinder 701 to rise and release the target PCB board, and the product blocking block 502 is driven by the product blocking cylinder 501 to rise and release the target PCB board. The target PCB board is transmitted to the next station through friction with the transmission chain 603.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An online selective PCB tinning machine, characterized by: It includes a base, a tin brushing mechanism and a conveying mechanism, wherein the tin brushing mechanism and the conveying mechanism are both fixedly connected to the base; The tin brushing mechanism comprises an X-axis linear transmission module (301) fixedly connected to a base, an X-axis servo motor (302) for controlling the X-axis linear transmission module (301) fixedly connected to the X-axis linear transmission module (301), an X-axis drag chain (303) installed on the lower side of the X-axis linear transmission module (301), a Y-axis linear transmission module (304) installed at the output end of the X-axis linear transmission module (301), and a Y-axis linear transmission module (304) fixedly connected to control the Y-axis linear transmission module The invention relates to a Y-axis servo motor (305) of the linear transmission module (304), a Z-axis linear transmission module (306) is installed on the Y-axis linear transmission module (304), a Z-axis servo motor (307) for controlling the Z-axis linear transmission module (306) is fixedly connected to the Z-axis linear transmission module (306), a tin slag brush (308) is installed at the output portion of the Z-axis linear transmission module (306), and a tin slag collection box (309) corresponding to the tin slag brush (308) is installed at the output portion of the Z-axis linear transmission module (306).

2. The online selective PCB tinning machine according to claim 1, characterized in that: The conveying mechanism comprises two track fixing seats (401) fixedly connected to the upper side of the base, the upper sides of the two track fixing seats (401) are fixedly connected to the same fixed conveying track (402), the vertical side walls of the two track fixing seats (401) are fixedly connected to track width adjustment guide rods (403), the two track width adjustment guide rods (403) are movably sleeved with a movable plate (404), a track width adjustment ball screw (405) is installed on the track fixing seats (401), a screw hole is opened on the movable plate (404), and the track width adjustment ball screw (405) passes through the movable plate (404) through the screw hole, and the two movable plates The upper side of (404) is fixedly connected to the same adjustable conveying track (406), the adjustable conveying track (406) is fixedly connected to a track width adjustment stepping motor (407), a track width adjustment synchronous belt (408) is arranged between the track width adjustment ball screw (405) and the track width adjustment stepping motor (407), a product conveyor is installed on the side of the adjustable conveying track (406) opposite to the fixed conveying track (402), a product positioning mechanism is connected to the fixed conveying track (402) and the adjustable conveying track (406), and a plurality of product clamping mechanisms are installed on both the fixed conveying track (402) and the adjustable conveying track (406).

3. The online selective PCB tinning machine according to claim 2, characterized in that: The product positioning mechanism comprises a product blocking cylinder (501) fixedly connected to a fixed conveying track (402), the output end of the product blocking cylinder (501) being fixedly connected to a product blocking block (502), the fixed conveying track (402) and the adjustable conveying track (406) being fixedly connected to a product in-position cylinder (503), and the output end of the product in-position cylinder (503) being fixedly connected to a product in-position positioning block (504).

4. The online selective PCB tinning machine according to claim 2, characterized in that: The product conveyor comprises two product conveying stepper motors (601) respectively fixedly connected to a fixed conveying track (402) and an adjustable conveying track (406); two driven wheels (602) are rotatably mounted on the fixed conveying track (402) and the adjustable conveying track (406); a transmission chain (603) is wound around the two driven wheels (602); and the transmission chain (603) is wound around the output shaft of the product conveying stepper motor (601).

5. The online selective PCB tinning machine according to claim 2, characterized in that: The product pressing mechanism comprises a product pressing cylinder (701), and the output end of the product pressing cylinder (701) is fixedly connected to a product pressing plate (702).

6. The online selective PCB tinning machine according to claim 1, characterized in that: The base comprises a welding frame (101), the upper side of the welding frame (101) is fixedly connected to a frame bottom plate (102), the tin brushing mechanism and the conveying mechanism are both fixedly connected to the frame bottom plate (102), the upper side of the frame bottom plate (102) is fixedly connected to an upper cover (103), the tin brushing mechanism and the conveying mechanism are both located in the upper cover (103), the front side of the upper cover (103) is hinged with a flip door (104), the flip door (104) is embedded with an organic glass plate (105), the upper cover (103) is installed with a button panel (106), the top of the upper cover (103) is installed with a three-color lamp (107), and the right side of the upper cover (103) is installed with a display (108) and a keyboard (109).

7. The online selective PCB tinning machine according to claim 6, characterized in that: The side walls of the flip door (104) on both the front and rear sides are symmetrically fixedly connected with two mounting plates (801); two cross bars (802) are symmetrically fixedly connected between the two mounting plates (801) on the same side; a same magnetic plate (803) is movably sleeved outside the two cross bars (802); a plurality of cleaning strips (804) are fixedly connected to one side of the magnetic plate (803) located on the rear side close to the organic glass plate (105); and the polarities of the two opposite sides of the two magnetic plates (803) are opposite.

8. The online selective PCB tinning machine according to claim 6, characterized in that: The four corners of the bottom of the welding frame (101) are all fixedly connected with adjustable foot cups (901), and the bottom of the welding frame (101) is fixedly connected with a plurality of universal casters (902).

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