Surface cleaning device and method for circuit board element welding

Abstract

The invention relates to the technical field of circuit board processing, in particular to a surface cleaning device and method for circuit board element welding, and the device comprises a clamping mechanism, a chain plate type conveyor belt, blowing parts, two groups of driving mechanisms and a turning mechanism, the number of the driving mechanisms is two, and the two groups of driving mechanisms and the two blowing parts are arranged in a one-to-one correspondence manner; the driving mechanism is used for driving the blowing parts to slide on the side edge plates, the number of the direction changing mechanisms is four, the four sets of direction changing mechanisms are arranged on the two blowing parts in a pairwise mode, and the two sets of direction changing mechanisms located on the same blowing part are symmetrically distributed up and down. Circuit boards are automatically conveyed through the chain plate type conveying belt, the circuit boards can automatically move towards the blowing cleaning area, then the circuit boards are comprehensively cleaned through the blowing parts which can expand and draw close on the left side and the right side, and finally the circuit boards on the conveying belt can be sequentially subjected to surface cleaning work one by one through the driving mechanism. And a guarantee is provided for subsequent circuit board processing.

Description

Technical Field

[0001] The invention relates to the technical field of circuit board processing, in particular to a surface cleaning device and a cleaning method for circuit board component welding. Background Art

[0002] Circuit boards are an indispensable part of electronic devices, and their design and manufacturing quality directly affect the performance and reliability of electronic devices.

[0003] Nowadays, in the process of circuit board processing, in order to improve the conductivity of the circuit board and ensure the integrity of the function of the circuit board after production, some electronic components (such as resistors, capacitors, chips, etc.) are usually welded on its surface. In the process of component welding, the solder may not be completely melted or attached to the wrong place, forming solder beads, solder slag and other residues. In addition, there may be some impurities such as dust and fine particles in the processing environment, which will adhere to the surface of the circuit board. If these residues and impurities are not cleaned up and the circuit board is directly put into use, it may affect the quality and performance of the circuit board, thereby affecting the use of the final product.

[0004] The existing operation of cleaning the circuit board after the component welding is usually to use a spray gun to clean it. The staff holds the spray gun and blows air on the surface of the circuit board to blow away the residue on the surface of the circuit board. However, since the jet nozzle of the spray gun is usually small, the staff needs to swing the spray gun to ensure that the surface of the circuit board can be fully cleaned. This manual cleaning method is not only inefficient and difficult to meet the needs of automated processing, but also puts a heavy burden on the staff's wrist after working for a long time, which is not conducive to the health of the staff. To this end, we propose a surface cleaning device and cleaning method for circuit board component welding to well solve the above disadvantages. Summary of the invention

[0005] The object of the present invention is to provide a surface cleaning device and a cleaning method for circuit board component welding, so as to solve the problems raised in the above-mentioned background technology.

[0006] The present invention is realized by the following technical scheme: a surface cleaning device for circuit board component welding, comprising a clamping mechanism, the number of the clamping mechanisms being several, and further comprising: A chain plate conveyor belt, wherein a plurality of the clamping mechanisms are arranged equidistantly on the chain plate conveyor belt, and side plates are symmetrically arranged on the front and rear sides of the chain plate conveyor belt, and the clamping mechanism is located between two side plates; The blowing part, the number of the blowing parts is two, the blowing part is an internal hollow structure and is connected to an external air source through a hose, the two blowing parts are symmetrically distributed on the two side plates, and the two blowing parts are respectively slidably matched with the corresponding side plates, and the blowing part is provided with a plurality of air delivery pipes on a side facing the starting end of the chain plate conveyor belt, the air delivery pipes are distributed along the length direction of the blowing part, the part of the air delivery pipe exposed outside the blowing part is provided with a plurality of air blowing nozzles at intervals, and the air delivery pipe is rotatably connected to the side wall of the blowing part; A driving mechanism, wherein the number of the driving mechanism is two groups, the two groups of the driving mechanism and the two blowing parts are arranged in a one-to-one correspondence, and the driving mechanism is used to drive the blowing parts to slide on the side panels; A direction-changing mechanism, wherein the direction-changing mechanism corresponds to the air blowing part one by one, and the direction-changing mechanism is arranged on the corresponding air blowing part, and is used to drive the air delivery pipe to rotate around its own central axis.

[0007] Optionally, the clamping mechanism includes a supporting plate fixedly mounted on the chain-type conveyor belt, the upper surface of the supporting plate is provided with a clamping portion, the clamping portion is in a U-shape, and installation grooves for inserting circuit boards are provided on both left and right sides of the interior of the clamping portion.

[0008] Optionally, a movable groove is provided on the side plate, and a protective part is slidably connected to the movable groove along the conveying direction of the chain plate conveyor belt. The protective part has an internal hollow structure, and the length direction of the protective part is perpendicular to the length direction of the side plate. The blowing part is slidably connected to the protective part along the length direction of the protective part, and the length of the protective part is not less than the length of the blowing part.

[0009] Optionally, the driving mechanism includes a driving plate, which is slidably arranged along the conveying direction of the clamping mechanism, and a compression spring is provided on the inner side surface of the side plate for elastic connection of the driving plate. One end of the driving plate abuts against the bottom of the blowing part, and the driving plate is used to drive the blowing part to move.

[0010] Optionally, a driving gear is rotatably provided at one end of the driving plate abutting against the blowing part, and the driving mechanism also includes a second tooth plate, which is fixedly connected to the bottom of the blowing part along the length direction of the blowing part, and the driving gear and the second tooth plate are meshed.

[0011] Optionally, a first tooth plate is fixedly provided on the inner side surface of the side plate, the height of the first tooth plate is not higher than the height of the inner bottom surface of the movable groove, and the height of the upper surface of the first tooth plate is lower than the height of the lower surface of the second tooth plate; when the driving plate moves to the position of the first tooth plate, the driving gear and the first tooth plate are meshed, and the first tooth plate and the second tooth plate are staggered and meshed on the driving gear.

[0012] Optionally, the supporting plate is provided with telescopic blocks on the sides facing the two side plates, the telescopic blocks are elastically arranged along the length direction of the supporting plate, and an arc-shaped protrusion is fixedly arranged on the inner side surface of the side plate, the arc-shaped protrusion is located below the driving plate, and the height of the lower surface of the driving plate is lower than the height of the upper surface of the telescopic block, and the height of the upper surface of the arc-shaped protrusion is higher than the height of the lower surface of the telescopic block; when the telescopic block moves to the position of the arc-shaped protrusion, the arc-shaped protrusion and the driving plate are staggered and abutted on the same side of the telescopic block; A limit assembly is also provided on the inner side surface of the side panel, and the limit assembly includes a limit block elastically connected to the inner side surface of the side panel, and a limit groove for the limit block to be embedded is provided on the side surface of the side panel facing the same side as the driving plate, and the limit assembly also includes a linkage block, which is elastically connected along the thickness direction of the side panel, and the elastic force exerted on the linkage block is less than the elastic force exerted on the telescopic block; when the telescopic block and the linkage block are in contact, the linkage block contracts toward the inside of the side panel.

[0013] Optionally, the changing mechanism includes a plurality of driven gears, and the plurality of driven gears correspond to the plurality of air pipes one by one. The plurality of driven gears are respectively fixedly mounted on the rotating shafts corresponding to the air pipes, and the blowing part is located on one surface of the inner cavity of the protective part and is slidably connected with two third tooth plates, and the two third tooth plates are relatively slidably arranged along the height direction of the blowing part, and the plurality of driven gears are equidistantly arranged on the two third tooth plates along the height direction of the blowing part, and the driven gears and the third tooth plates are meshed with each other.

[0014] Optionally, sliding blocks are fixed on the sides of the two third tooth plates, and the inner side wall of the protective part is provided with two combined sliding grooves, which are symmetrically distributed up and down, and the two combined sliding grooves are respectively used for sliding connection of the two sliding blocks.

[0015] The present invention also provides a surface cleaning method for circuit board component welding, which is suitable for the above-mentioned cleaning device and comprises the following steps: First, the circuit board with the components welded is fixedly clamped on the clamping mechanism located in front of the blowing end of the blowing part, and the clamping mechanism is controlled to drive the circuit board to move toward the blowing end of the blowing part by conveying with a chain plate conveyor belt; When the clamping mechanism contacts the driving mechanism, the clamping mechanism drives the blowing part to move a distance in the conveying direction of the clamping mechanism synchronously through the driving mechanism, and the blowing end of the blowing part always faces the circuit board to perform the blowing cleaning operation; The blowing part will move to both sides of the side plate during the movement, so that the two blowing parts are away from each other, and the blowing direction of the blowing part is changed by using the changing mechanism to clean the surface of the circuit board; When the distance between the two blowing parts is large enough for the clamping mechanism to pass through, the clamping mechanism continues to be conveyed by the chain plate conveyor until the clamping mechanism moves to the back of the blowing part; Finally, when the clamping mechanism moves to the back of the blowing part, the position of the blowing part is no longer fixed, the driving mechanism drives the blowing part to reset, and the two blowing parts approach each other to perform a blowing cleaning operation on the next circuit board.

[0016] Compared with the prior art, the present invention provides a surface cleaning device and a cleaning method for circuit board component welding, which have the following beneficial effects: 1. The present invention uses a chain plate conveyor belt to automatically transport the circuit board, so that the circuit board can automatically move toward the air blowing cleaning area, and then uses the air blowing parts on the left and right sides that can expand and close together to comprehensively clean the circuit board. Finally, the driving mechanism enables the circuit boards on the conveyor belt to be cleaned one by one in an orderly manner, which provides a guarantee for the subsequent processing of the circuit board; 2. The present invention uses a direction-changing component to enable the blowing part to change the blowing direction during the expansion process. The blowing direction has three modes: vertical blowing, blowing from the middle to the upper and lower sides, and blowing from the upper and lower sides to the middle, so that the device can clean the circuit board more comprehensively and improve the cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the structure of the clamping mechanism and the driving mechanism of the present invention; Figure 3 A top view of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the driving mechanism of the present invention; Figure 5 It is a schematic diagram of the structure of the direction-changing mechanism of the present invention; Figure 6 It is a top cross-sectional view of the limiting component of the present invention.

[0018] In the figure: 1. Clamping mechanism; 101. Support plate; 102. Clamping part; 103. Telescopic block; 2. Side plate; 201. Movable groove; 202. First tooth plate; 203. Obstruction part; 3. Blowing part; 301. Air pipe; 302. Blowing nozzle; 4. Driving mechanism; 401. Driving plate; 402. Driving gear; 403. Second tooth plate; 5. Direction changing mechanism; 501. Driven gear; 502. Third tooth plate; 6. Protective part; 601. Combined slide groove; 7. Arc-shaped protrusion; 8. Limiting assembly; 801. Limiting block; 802. Linking block; 803. Linking plate. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Example 1: Please refer to Figure 1 - Figure 6 A surface cleaning device for circuit board component welding, comprising a clamping mechanism 1, a plurality of clamping mechanisms 1, and further comprising: A chain plate conveyor belt, a plurality of clamping mechanisms 1 are arranged equidistantly on the chain plate conveyor belt, side plates 2 are symmetrically provided on the front and rear sides of the chain plate conveyor belt, and the clamping mechanism 1 is located between the two side plates 2, so that the circuit board can be automatically transported by the chain plate conveyor belt, thereby improving the production and processing efficiency of the circuit board.

[0021] It also has a blowing part 3, the number of which is two. The blowing part 3 is an internal hollow structure and is connected to an external air source through a hose. The external air source is an air pump (not shown in the drawings of this embodiment). The two blowing parts 3 are symmetrically distributed on the two side plates 2, and the two blowing parts 3 are respectively slidably matched with the corresponding side plates 2. The blowing part 3 is provided with a plurality of air pipes 301 on the side facing the starting end of the chain plate conveyor belt, so that the blowing part 3 can perform a blowing operation on the surface of the circuit board during the transportation of the circuit board, thereby achieving the cleaning of the circuit board. The air pipes 301 are distributed along the length direction of the blowing part 3, and the part of the air pipe 301 exposed outside the blowing part 3 is provided with a plurality of air nozzles 302 at intervals, and the air pipe 301 is rotatably connected to the side wall of the blowing part 3, so that the air pipe 301 can change the direction of the air nozzle 302 by rotating, thereby performing a blowing operation on the circuit board in different directions.

[0022] It also includes a driving mechanism 4, which is divided into two groups. The two groups of driving mechanisms 4 and the two blowing parts 3 are arranged in a one-to-one correspondence. The driving mechanism 4 is used to drive the blowing part 3 to slide on the side plate 2, so that when the circuit board approaches the blowing part 3, the driving mechanism 4 can drive the blowing part 3 to move a distance along the conveying direction of the conveyor belt, thereby increasing the cleaning time of the circuit board by the blowing part 3 and improving the cleaning effect.

[0023] It also includes a changing mechanism 5, which corresponds to the blowing part 3 one by one. The changing mechanism 5 is arranged on the corresponding blowing part 3 and is used to drive the air pipe 301 to rotate around its own central axis, so that the changing mechanism 5 can control the rotation of the air pipe 301 on the blowing part 3, thereby changing the blowing direction of the blowing nozzle 302, so that the blowing part 3 can perform multi-directional blowing cleaning operations on the circuit board, thereby improving the cleaning efficiency.

[0024] Further, the clamping mechanism 1 includes a supporting plate 101 fixedly arranged on the chain plate conveyor belt. A clamping portion 102 is provided on the upper surface of the supporting plate 101. The clamping portion 102 is in a U shape. Installation grooves for inserting the circuit board are formed on the left and right sides inside the clamping portion 102, so that the circuit board can be vertically inserted onto the clamping portion 102 and thus fixed on the clamping mechanism 1.

[0025] A movable groove 201 is formed on the side plate 2. A protective portion 6 is slidably connected in the movable groove 201 along the conveying direction of the chain plate conveyor belt. The protective portion 6 has a hollow structure inside. The length direction of the protective portion 6 is perpendicular to the length direction of the side plate 2. The air blowing portion 3 is slidably connected in the protective portion 6 along the length direction of the protective portion 6. The length of the protective portion 6 is not less than the length of the air blowing portion 3, so that when the protective portion 6 slides in the movable groove 201, it can drive the air blowing portion 3 to slide synchronously, and the air blowing portion 3 itself can slide along the length direction of the protective portion 6 inside the protective portion 6, enabling the two air blowing portions 3 to approach or expand relative to each other to perform a more comprehensive cleaning operation on the surface of the circuit board.

[0026] The driving mechanism 4 is described in detail below: The driving mechanism 4 includes a driving plate 401. The driving plate 401 is slidably arranged along the conveying direction of the clamping mechanism 1. A compression spring for elastically connecting the driving plate 401 is provided on the inner side surface of the side plate 2. One end of the driving plate 401 abuts against the bottom of the air blowing portion 3. The driving plate 401 is used to drive the air blowing portion 3 to move; when the clamping mechanism 1 moves to the end of the driving plate 401 away from the air blowing portion 3, the telescopic block 103 will abut against the end of the driving plate 401 away from the air blowing portion 3, so that the telescopic block 103 can drive the driving plate 401 to move synchronously in the conveying direction of the conveyor belt, and the driving plate 401 will push the air blowing portion 3 to move synchronously, thereby extending the cleaning time of the air blowing portion 3 on the circuit board and improving the cleaning effect.

[0027] A driving gear 402 is rotatably arranged at one end of the driving plate 401 that abuts against the air blowing portion 3. The driving mechanism 4 further includes a second toothed plate 403. The second toothed plate 403 is fixedly connected to the bottom of the air blowing portion 3 along the length direction of the air blowing portion 3. The driving gear 402 meshes with the second toothed plate 403, so that when the driving gear 402 rotates, it can drive the second toothed plate 403 to move along the length direction of the air blowing portion 3, thereby driving the two air blowing portions 3 to approach or move away from each other.

[0028] In order to enable the active gear 402 to rotate, a first tooth plate 202 is fixedly provided on the inner side surface of the side plate 2 in the present application, and the height of the first tooth plate 202 is not higher than the height of the inner bottom surface of the movable groove 201, and the height of the upper surface of the first tooth plate 202 is lower than the height of the lower surface of the second tooth plate 403; when the driving plate 401 moves to the position of the first tooth plate 202, the active gear 402 and the first tooth plate 202 are meshed, and the first tooth plate 202 and the second tooth plate 403 are staggered and meshed on the active gear 402, so that when the active gear 402 moves on the first tooth plate 202, the first tooth plate 202 will drive the active gear 402 to rotate, and the active gear 402 will drive the second tooth plate 403 to move along the length direction of the protective part 6, thereby driving the blowing part 3 to move toward the inner cavity of the protective part 6 while moving in the conveying direction of the conveyor belt, so that the blowing parts 3 on both sides can change from being close to each other to being expanded, which can not only blow away the impurities on the circuit board, but also avoid blocking the continuous movement of the clamping mechanism 1.

[0029] In this embodiment, telescopic blocks 103 are provided on the sides of the support plate 101 facing the two side plates 2. The telescopic blocks 103 are elastically arranged along the length direction of the support plate 101, so that when the support plate 101 moves to one end of the driving plate 401, the telescopic blocks 103 will abut against the driving plate 401, so that the support plate 101 can push the driving plate 401 to move synchronously. An arc-shaped protrusion 7 is fixedly provided on the inner side surface of the side plate 2, and the arc-shaped protrusion 7 is located below the driving plate 401, and the lower surface height of the driving plate 401 is lower than the upper surface height of the telescopic block 103, and the upper surface height of the arc-shaped protrusion 7 is higher than the lower surface height of the telescopic block 103; when the telescopic block 103 moves to the position of the arc-shaped protrusion 7, the arc-shaped protrusion 7 and the driving plate 401 are staggered and abutted on the same side of the telescopic block 103, so that when the telescopic block 103 moves to the position of the arc-shaped protrusion 7, the arc-shaped protrusion 7 will squeeze the telescopic block 103 into the supporting plate 101, thereby shortening the exposed length of the telescopic block 103, and then the telescopic block 103 no longer contacts the side of the driving plate 401 away from the blowing portion 3, but will continue to slide forward on the inner side surface of the driving plate 401, so that the clamping mechanism 1 can drive the circuit board to continue to move forward.

[0030] In order to fix the blowing parts 3 on both sides after they are fully expanded and avoid direct resetting and closing to hinder the movement of the clamping mechanism 1, in the present application, a limit assembly 8 is also provided on the inner side surface of the side panel 2, and the limit assembly 8 includes a limit block 801 elastically connected to the inner side surface of the side panel 2, and a limit groove for the limit block 801 to be embedded is provided on the side surface of the driving plate 401 facing the same side of the side panel 2, so that when the blowing part 3 is fully expanded, the limit block 801 will be embedded in the limit groove on the driving plate 401, so that the driving plate 401 will not rebound and reset, thereby achieving the fixation of the position of the blowing part 3.

[0031] like Figure 4 and Figure 6 As shown, the limit assembly 8 also includes a linkage block 802, which is elastically connected along the thickness direction of the side plate 2. When one end of the driving plate 401 moves to the position of the limit block 801, the limit block 801 will be embedded in the limit groove on the driving plate 401, and the limit block 801 is a wedge-shaped block, so that the limit block 801 has a better limit and fixation effect on the driving plate 401. At this time, the clamping mechanism 1 can continue to move without being hindered by the blowing part 3. When the clamping mechanism 1 moves to the position of the linkage block 802, the telescopic block 103 will abut the linkage block 802. It should be noted that the elastic force on the telescopic block 103 is greater than the elastic force on the linkage block 802, so that the telescopic block 103 can squeeze the linkage block 802 into the side plate 2. The end of the limit block 801 and the linkage block 802 located inside the side plate 2 is commonly connected to a linkage plate 803, so that when the linkage block 802 moves into the side plate 2, the limit block 801 will also move synchronously, so that the limit block 801 will be disengaged from the limit groove of the drive plate 401. At this time, the drive plate 401 will be reset by the elastic force, so that the blowing part 3 will be reset and moved closer, so as to perform the same cleaning operation on the next circuit board.

[0032] The direction changing mechanism 5 is described in detail below: The direction-changing mechanism 5 includes a plurality of driven gears 501, and the plurality of driven gears 501 correspond to the plurality of air pipes 301 one by one. The plurality of driven gears 501 are fixedly mounted on the rotating shafts of the corresponding air pipes 301, and the air blowing portion 3 is located on one surface of the inner cavity of the protective portion 6 and is slidably connected with two third tooth plates 502. The two third tooth plates 502 are relatively slidably arranged along the height direction of the air blowing portion 3. The plurality of driven gears 501 are equidistantly arranged on the two third tooth plates 502 along the height direction of the air blowing portion 3, and the driven gears 501 and the third tooth plates 502 are meshed with each other, so that when the third tooth plates 502 move up and down, the driven gears 501 can be driven to rotate, thereby driving the air pipe 301 to rotate, thereby changing the blowing direction of the air blowing nozzle 302, and improving the cleaning efficiency of the circuit board.

[0033] like Figure 5 As shown, sliders are fixed on the sides of the two third tooth plates 502, and two combined slide grooves 601 are provided on the inner wall of the protective part 6. The two combined slide grooves 601 are symmetrically distributed up and down, and the two combined slide grooves 601 are respectively used for sliding connection of the two sliders. The combined slide groove 601 consists of a V-shaped groove and a horizontal groove. When the slider on the third tooth plate 502 moves in the V-shaped groove, the third tooth plate 502 starts to move up and down, so that the blowing direction of the blowing part 3 is tilted; when the slider on the third tooth plate 502 moves in the horizontal groove, the third tooth plate 502 no longer moves up and down, so that the blowing direction of the blowing part 3 remains perpendicular to the circuit board.

[0034] It is worth mentioning that the inner side surfaces of the two side panels 2 are fixed with obstruction parts 203, such as Figure 2 and Figure 3 As shown, two obstructing parts 203 are arranged one in front of the other. When the clamping mechanism 1 is moving, the clamping part 102 will contact the two obstructing parts 203 one by one, so that one side of the clamping part 102 is obstructed, and the clamping part 102 is rotatably connected to the supporting plate 101, so the clamping part 102 will swing left and right, which can not only throw off the impurities on the circuit board, but also cooperate with the blowing direction of the blowing part 3 to perform more effective cleaning work. It should be noted that a torsion spring is sleeved on the outer side of the rotating shaft between the clamping part 102 and the supporting plate 101, and the upper and lower ends of the torsion spring are respectively fixedly connected to the clamping part 102 and the supporting plate 101, so that the clamping part 102 can always remain facing the blowing part 3 in a natural state, which is convenient for blowing and cleaning the circuit board. Example 2: Please refer to Figure 1 - Figure 6 The present application embodiment provides a surface cleaning method for circuit board component welding, which is applicable to the cleaning device in the above-mentioned embodiment 1, and includes the following steps: First, insert the circuit board with components welded into the clamping groove on the clamping part 102 in the vertical direction perpendicular to the conveyor belt, so that the circuit board is fixed on the clamping mechanism 1, and then use the chain plate conveyor belt to control the support plate 101 to move toward the blowing end of the blowing part 3. The support plate 101 will drive the clamping part 102 to move synchronously, and the clamping part 102 clamps the circuit board and moves toward the blowing part 3 together.

[0035] During the movement of the clamping mechanism 1, the telescopic block 103 on the supporting plate 101 will first touch the side of the driving plate 401 away from the blowing part 3. At this time, the telescopic block 103 will push the driving plate 401 forward, and the driving plate 401 will drive the blowing part 3 to move forward together, so that the circuit board and the blowing part 3 can move synchronously for a distance, thereby extending the blowing and cleaning time of the blowing part 3.

[0036] Subsequently, when the blowing part 3 moves to the position of the first tooth plate 202, the driving gear 402 will move to the first tooth plate 202, so that the driving gear 402 and the first tooth plate 202 are meshed. When the blowing part 3 continues to move forward, the driving gear 402 will be driven by the first tooth plate 202 to start rotating. Since the driving gear 402 and the second tooth plate 403 are also meshed together, the rotation of the driving gear 402 will drive the second tooth plate 403 to move toward the inner cavity of the protective part 6, and the second tooth plate 403 drives the blowing part 3 to move toward the inner cavity of the protective part 6, so that the two blowing parts 3 begin to move relatively away from each other.

[0037] As the blowing part 3 continues to move toward the inner cavity of the protective part 6, the blowing direction of the blowing part 3 is driven by the changing mechanism 5 to change, and the surface of the circuit board is cleaned. Specifically, when the blowing part 3 moves toward the inner cavity of the protective part 6, the slider on the third tooth plate 502 will start to move along the trajectory of the combined slide groove 601; when the slider moves in the V-shaped groove of the combined slide groove 601, the third tooth plate 502 will start to move up and down. Since the upper and lower combined slide grooves 601 are symmetrically arranged, the upper and lower third tooth plates 502 will move relative to each other, so that the rotation directions of the upper and lower driven gears 501 are opposite. When the driven gear 501 rotates, it will drive the air pipe 301 to rotate together, so that the upper and lower air pipes 301 of the two groups are flipped in opposite directions, thereby changing the direction of the blowing nozzle 302.

[0038] Specifically, when the two third tooth plates 502 are close to each other, the blowing nozzles 302 of the upper and lower gas delivery pipes 301 will flip from the middle to the upper and lower sides; when the two third tooth plates 502 are away from each other, the blowing nozzles 302 of the upper and lower gas delivery pipes 301 will flip from the upper and lower sides to the middle. Thus, the blowing direction of the blowing part 3 changes in various ways, improving the cleaning effect of the circuit board.

[0039] When the two blowing parts 3 expand to a distance between them that allows the clamping mechanism 1 to pass through, one end of the driving plate 401 moves to the position of the limit block 801, and the limit block 801 will be embedded in the limit groove on the driving plate 401, thereby fixing the driving plate 401, and then the blowing part 3 is fixed by the limit assembly 8, preventing the blowing part 3 from resetting and closing to hinder the movement of the clamping mechanism 1. At this time, the telescopic block 103 abuts against the arc-shaped protrusion 7, and the arc-shaped protrusion 7 will squeeze the telescopic block 103 into the inside of the supporting plate 101, so that the telescopic block 103 no longer abuts against the side of the driving plate 401 away from the blowing part 3, but will slide forward on the inner side of the driving plate 401, so that the clamping mechanism 1 can move to the back of the blowing part 3 without being hindered.

[0040] Finally, when the clamping mechanism 1 moves to the back of the blowing part 3, the telescopic block 103 will move to the state of contact with the linkage block 802. Since the elastic coefficient of the telescopic block 103 is much larger than the elastic coefficient of the linkage block 802, the telescopic block 103 can squeeze the linkage block 802 into the side plate 2, and the linkage block 802 can drive the linkage plate 803 to move synchronously into the side plate 2. The linkage plate 803 will drive the limit block 801 to move into the side plate 2, so that the limit block 801 is disengaged from the limit groove on the drive plate 401, so that the drive plate 401 can be reset by the spring, and then the blowing part 3 can realize the reset and close operation, which is convenient for the next circuit board to be blown and cleaned.

[0041] 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. A surface cleaning device for circuit board component welding, comprising a clamping mechanism, the number of the clamping mechanisms being several, characterized in that: Also includes: A chain plate conveyor belt, wherein a plurality of the clamping mechanisms are arranged equidistantly on the chain plate conveyor belt, and side plates are symmetrically arranged on the front and rear sides of the chain plate conveyor belt, and the clamping mechanism is located between two side plates; The blowing part, the number of the blowing parts is two, the blowing part is an internal hollow structure and is connected to an external air source through a hose, the two blowing parts are symmetrically distributed on the two side plates, and the two blowing parts are respectively slidably matched with the corresponding side plates, and the blowing part is provided with a plurality of air delivery pipes on a side facing the starting end of the chain plate conveyor belt, the air delivery pipes are distributed along the length direction of the blowing part, the part of the air delivery pipe exposed outside the blowing part is provided with a plurality of air blowing nozzles at intervals, and the air delivery pipe is rotatably connected to the side wall of the blowing part; A driving mechanism, wherein the number of the driving mechanism is two groups, the two groups of the driving mechanism and the two blowing parts are arranged in a one-to-one correspondence, and the driving mechanism is used to drive the blowing parts to slide on the side panels; A direction-changing mechanism, wherein the direction-changing mechanism corresponds to the air blowing part one by one, and the direction-changing mechanism is arranged on the corresponding air blowing part, and is used to drive the air delivery pipe to rotate around its own central axis.

2. A surface cleaning device for circuit board component welding according to claim, characterized in that: The clamping mechanism comprises a supporting plate fixedly arranged on the chain plate conveyor belt, the upper surface of the supporting plate is provided with a clamping portion, the clamping portion is in a U-shape, and both left and right sides of the inside of the clamping portion are provided with mounting grooves for inserting circuit boards.

3. A surface cleaning device for circuit board component welding according to claim, characterized in that: A movable groove is provided on the side plate, and a protective part is slidably connected to the movable groove along the conveying direction of the chain plate conveyor belt. The protective part has an internal hollow structure, and the length direction of the protective part is perpendicular to the length direction of the side plate. The blowing part is slidably connected to the protective part along the length direction of the protective part, and the length of the protective part is not less than the length of the blowing part.

4. A surface cleaning device for circuit board component welding according to claim 1, characterized in that: The driving mechanism includes a driving plate, which is slidably arranged along the conveying direction of the clamping mechanism. A compression spring for elastically connecting the driving plate is provided on the inner side of the side plate. One end of the driving plate abuts against the bottom of the blowing part, and the driving plate is used to drive the blowing part to move.

5. A surface cleaning device for circuit board component welding according to claim, characterized in that: The driving plate is rotatably provided with a driving gear at one end abutting against the blowing part, and the driving mechanism also includes a second tooth plate, which is fixedly connected to the bottom of the blowing part along the length direction of the blowing part, and the driving gear is meshed with the second tooth plate.

6. A surface cleaning device for circuit board component welding according to claim, characterized in that: A first tooth plate is fixedly provided on the inner side surface of the side plate, the height of the first tooth plate is not higher than the height of the inner bottom surface of the movable groove, and the height of the upper surface of the first tooth plate is lower than the height of the lower surface of the second tooth plate; when the driving plate moves to the position of the first tooth plate, the driving gear and the first tooth plate are meshed, and the first tooth plate and the second tooth plate are staggered and meshed on the driving gear.

7. A surface cleaning device for circuit board component welding according to claim, characterized in that: The side surfaces of the supporting plate facing the two side plates are each provided with a telescopic block, the telescopic block being elastically arranged along the length direction of the supporting plate, an arc-shaped protrusion being fixedly arranged on the inner side surface of the side plate, the arc-shaped protrusion being located below the driving plate, and the lower surface height of the driving plate being lower than the upper surface height of the telescopic block, and the upper surface height of the arc-shaped protrusion being higher than the lower surface height of the telescopic block; when the telescopic block moves to the position of the arc-shaped protrusion, the arc-shaped protrusion and the driving plate are staggered and abutted on the same side surface of the telescopic block; A limit assembly is also provided on the inner side surface of the side panel, and the limit assembly includes a limit block elastically connected to the inner side surface of the side panel, and a limit groove for the limit block to be embedded is provided on the side surface of the side panel facing the same side as the driving plate, and the limit assembly also includes a linkage block, which is elastically connected along the thickness direction of the side panel, and the elastic force exerted on the linkage block is less than the elastic force exerted on the telescopic block; when the telescopic block and the linkage block are in contact, the linkage block contracts toward the inside of the side panel.

8. The surface cleaning device for circuit board component welding according to claim 1, characterized in that: The direction-changing mechanism includes a plurality of driven gears, and the plurality of driven gears correspond to the plurality of air pipes one by one. The plurality of driven gears are respectively fixedly mounted on the rotating shafts corresponding to the air pipes, and the air blowing portion is located on one surface of the inner cavity of the protective portion and is slidably connected with two third tooth plates, and the two third tooth plates are relatively slidably arranged along the height direction of the air blowing portion, and the plurality of driven gears are equidistantly arranged on the two third tooth plates along the height direction of the air blowing portion, and the driven gears are meshed with the third tooth plates.

9. A surface cleaning device for circuit board component welding according to claim, characterized in that: Slide blocks are fixedly provided on the side surfaces of the two third tooth plates, and two combined slide grooves are provided on the inner side wall of the protection part. The two combined slide grooves are symmetrically distributed up and down, and the two combined slide grooves are respectively used for sliding connection of the two slide blocks.

10. A surface cleaning method for circuit board component welding, applicable to the cleaning device according to any one of claims 1 to 9, characterized in that: The following steps are involved: First, the circuit board with the components welded is fixedly clamped on the clamping mechanism located in front of the blowing end of the blowing part, and the clamping mechanism is controlled to drive the circuit board to move toward the blowing end of the blowing part by conveying with a chain plate conveyor belt; When the clamping mechanism contacts the driving mechanism, the clamping mechanism drives the blowing part to move a distance in the conveying direction of the clamping mechanism synchronously through the driving mechanism, and the blowing end of the blowing part always faces the circuit board for blowing and cleaning operation; The blowing part will move to both sides of the side plate during the movement, so that the two blowing parts are away from each other, and the blowing direction of the blowing part is changed by using the changing mechanism to clean the surface of the circuit board; When the distance between the two blowing parts is large enough for the clamping mechanism to pass through, the clamping mechanism continues to be conveyed by the chain plate conveyor until the clamping mechanism moves to the back of the blowing part; Finally, when the clamping mechanism moves to the back of the blowing part, the position of the blowing part is no longer fixed, the driving mechanism drives the blowing part to reset, and the two blowing parts approach each other to perform a blowing cleaning operation on the next circuit board.

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