A SMT patch welding cleaning equipment

Abstract

The utility model discloses an SMT patch welding cleaning device, which specifically relates to the field of cleaning equipment, including a base, pillars are fixed at the four corners of the top of the base, and a dry ice cleaning machine is installed on the top of the pillars, mounting frames are fixed at the central positions of both ends of the base, and a conveyor belt is arranged between the mounting frames, sinking grooves are opened on the top of the base on both sides of the conveyor belt, and hydraulic push rods are installed at the middle position inside the sinking grooves, and a flip mechanism is fixed to the top output end of the hydraulic push rod. The utility model is provided with a dry ice cleaning machine, X, Y, Z axis guide rails and a spray gun, and the X, Y, Z axis guide rails work together to drive the spray gun to move back and forth above the circuit board to be cleaned, and clean various positions of the circuit board. The dry ice cleaning has higher cleaning efficiency, better effect, and no residue.

Description

Technical Field

[0001] The utility model relates to the field of cleaning equipment, and more specifically, to a SMT patch welding cleaning device. Background Art

[0002] SMT patch refers to the abbreviation of a series of process flows based on PCB. PCB is printed circuit board, SMT is surface mount technology, and it is the most popular technology and process in the electronic assembly industry. SMT patch processing usually requires welding operations. After welding, impurities such as flux and rosin will remain on the surface of the board, which needs to be cleaned.

[0003] After searching, the existing patent (publication number: CN220127931U) discloses a cleaning device for SMT patch processing welding, which belongs to the field of welding cleaning technology, including a welding base, on which a mounting frame is fixedly installed. The advantage of the utility model is that when the welding cleaning device cleans the fixed debris generated during welding of the welding head, the power motor is started, and the arc-shaped cleaning plate at the output end of the power motor is driven to rotate by the power motor. The arc design of the arc-shaped cleaning plate can move the solid debris to the surroundings of the welding workbench, and then the limiting plate is used to prevent the fixed debris from being thrown out during cleaning. When the solid debris moves to the set position, it will enter the conveying pipe through the collection groove, and then enter the central pipe through the conveying pipe, thereby falling into the pull-out collection box. When cleaning is needed, the pull-out collection box can be directly pulled out for cleaning, so that the solid debris generated during welding can be cleaned in time, and it is more convenient to collect and process the solid debris.

[0004] The existing welding cleaning method usually uses detergent, board washing water and brushes for cleaning. On the one hand, it cannot completely remove impurities such as flux adhering to the circuit board, and the cleaning effect is not good. On the other hand, there will be residual water after cleaning, and if the drying is not timely, it is easy to cause the circuit board to rust. In addition, the existing device needs to manually turn the circuit board over during cleaning, and the degree of automation is low, and the cleaning efficiency is low. At the same time, the above-cited patent documents do not propose relevant solutions to solve the above problems;

[0005] Therefore, a SMT patch welding cleaning device is proposed in view of the above problems. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, an embodiment of the utility model provides an SMT patch welding cleaning device to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present utility model provides the following technical solutions: An SMT patch welding cleaning device, including a base, pillars are fixed at four corners of the top of the base, and a dry ice cleaning machine is installed at the top of the pillars. Mounting frames are fixed at the central positions of both ends of the base, and a conveyor belt is arranged between the mounting frames. Sinking grooves are opened at the top of the base on both sides of the conveyor belt, and hydraulic jacks are installed at the middle positions inside the sinking grooves. The top output ends of the hydraulic jacks are respectively fixed with flipping mechanisms;

[0008] Both ends of the bottom of the dry ice cleaning machine are provided with X-axis guide rails, and X-axis movable blocks are installed on the X-axis guide rails. The bottom of the X-axis movable block is connected with a Y-axis guide rail, and a Y-axis movable block is installed on the Y-axis guide rail. The bottom of the Y-axis movable block is fixed with a Z-axis guide rail, and a Z-axis movable block is arranged on the Z-axis guide rail. An L-shaped plate is installed on one side of the Z-axis movable block, and a spray gun is fixed on the L-shaped plate. A nozzle is fixed at the bottom of the spray gun.

[0009] Preferably, a dry ice groove is opened at the central position of the top of the dry ice cleaning machine, and a sealing cover is hinged at the top of the dry ice groove. The bottom output end of the dry ice cleaning machine is connected with the input end of the spray gun through a hose.

[0010] Preferably, the flipping mechanisms are symmetrically arranged on both sides of the conveyor belt, and each flipping mechanism includes a mounting seat, a hydraulic telescopic rod and a clamping seat. A ball groove is opened at the middle position inside the mounting seat, and the hydraulic telescopic rod penetrates through the ball groove. Clamping seats are fixed on the sides of the hydraulic telescopic rods close to the conveyor belt, and limiting sleeves are sleeved on the ball grooves.

[0011] Preferably, the outer diameter of the hydraulic telescopic rod is matched with the inner diameter of the ball groove, and the limiting sleeves are fixed to the hydraulic telescopic rod through bolts. Tooth rings are integrally connected to the outer sides of the limiting sleeves, and transmission frames are fixed on the base on the outer sides of the mounting seats.

[0012] Preferably, the transmission frame is designed in an inverted "U" shape, and movable plates are fixed at both ends of the bottom of the transmission frame. Tooth grooves adapted to the tooth rings are arranged at both ends of one side of the transmission frame, and the number of notches of the tooth grooves is half of the number of teeth of the tooth rings.

[0013] Preferably, a first inclined groove is opened at the middle position of the top of the transmission frame, and second inclined grooves are arranged at the middle positions of the tops of the movable plates. Contact rods are arranged at the middle position of the top of the mounting seat and at the middle positions of both sides of the bottom. The diameters of the contact rods are respectively matched with the inner diameters of the first inclined groove and the second inclined groove.

[0014] Preferably, an adjusting screw is threadedly connected at the middle position of the top of the clamping seat, and an upper pressure plate is arranged inside the clamping seat. The bottom of the adjusting screw passes through the top of the clamping seat and is rotatably connected to the upper pressure plate, and the upper pressure plate and the lower half of the clamping seat are both designed in an arc-shaped outward expansion manner on the side close to the conveyor belt.

[0015] Preferably, the sinking trough is designed in an "H" shape, and the movable plate is slidably connected to the sinking trough.

[0016] Technical effects and advantages of the utility model:

[0017] 1. Compared with the prior art, the SMT patch welding cleaning equipment is provided with a dry ice cleaning machine, X, Y, Z axis guide rails and a spray gun. The X, Y, Z axis guide rails work together to drive the spray gun to move back and forth above the circuit board to be cleaned, and clean various positions of the circuit board. During cleaning, the dry ice particles are accelerated in the high-pressure airflow, sprayed through the nozzle of the spray gun, and impact the surface of the circuit board to be cleaned. The dry ice particles vaporize at the moment of impact and quickly exchange heat with the cleaning surface, absorbing a large amount of heat. Since the temperature difference between the dry ice particles and the cleaning surface is large, thermal shock will occur. After the temperature of the dirt layer decreases, the brittleness will increase, and then the dry ice particles can impact and break the dirt layer. The volume of the dry ice particles expands nearly 800 times in a few thousandths of a second, thus causing a "micro explosion" at the impact point, blowing and peeling off the dirt layer, with better cleaning effect and no residue after cleaning.

[0018] 2. Compared with the prior art, the SMT patch welding cleaning equipment is provided with a flipping mechanism. After one side of the circuit board is cleaned, the clamping seat of the flipping mechanism can clamp the circuit board and flip it. When flipping, the hydraulic push rod extends to drive the mounting seat to move upward. When moving upward, the gear ring engages with the tooth groove of the transmission frame, which can rotate the gear ring 180°, that is, drive the circuit board to be cleaned to flip 180°, and then the hydraulic push rod continues to extend to insert the interference rod at the top of the mounting seat into the first inclined groove. The insertion can move the transmission frame along the direction of the sinking groove, that is, separate the gear ring from the tooth groove, and then the mounting seat moves downward to put the circuit board to be cleaned back on the conveyor belt. When the mounting seat moves downward, the interference rod at its bottom will be inserted into the second inclined groove, so that the transmission frame is reset, which is convenient for the smooth implementation of the next flipping operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model.

[0020] Figure 2 This is a schematic diagram of the base structure of the utility model.

[0021] Figure 3 This is a schematic diagram of the structure of the hydraulic telescopic rod of the utility model.

[0022] Figure 4 This is a schematic diagram of the X-axis guide structure of the utility model.

[0023] Figure 5 This is a schematic diagram of the Z-axis guide structure of the utility model.

[0024] Figure 6 It is a schematic diagram of the transmission frame structure of the utility model.

[0025] The accompanying drawings are marked as follows: 1. base; 101. sinking trough; 2. pillar; 3. X-axis guide rail; 301. X-axis movable block; 4. dry ice cleaning machine; 401. dry ice trough; 5. sealing cover; 6. Y-axis guide rail; 601. Y-axis movable block; 7. flip mechanism; 8. conveyor belt; 9. mounting frame; 10. hydraulic push rod; 11. mounting seat; 1101. ball groove; 1102. resistance rod; 12. transmission frame; 1201. tooth groove; 1202. first inclined groove; 1203. second inclined groove; 1204. movable plate; 13. hydraulic telescopic rod; 1301. limit sleeve; 1302. gear ring; 14. clamping seat; 1401. adjusting screw; 1402. upper pressure plate; 15. Z-axis guide rail; 1501. Z-axis movable block; 16. spray gun; 17. L-shaped plate; 18. nozzle. DETAILED DESCRIPTION

[0026] 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.

[0027] Embodiment 1

[0028] As attached Figure 1 The SMT patch welding cleaning equipment shown in the figure comprises a base 1, pillars 2 are fixed at the four corners of the top of the base 1, and a dry ice cleaning machine 4 is installed on the top of the pillars 2, mounting frames 9 are fixed at the central positions of both ends of the base 1, and a conveyor belt 8 is arranged between the mounting frames 9, sinking grooves 101 are opened on the top of the base 1 on both sides of the conveyor belt 8, and hydraulic push rods 10 are installed at the middle position inside the sinking grooves 101, and the top output end of the hydraulic push rod 10 is fixed with a flip mechanism 7;

[0029] X-axis guide rails 3 are provided at both ends of the bottom of the dry ice cleaning machine 4, and X-axis movable blocks 301 are installed on the X-axis guide rails 3, the bottom of the X-axis movable block 301 is connected to the Y-axis guide rail 6, and the Y-axis movable block 601 is installed on the Y-axis guide rail 6, the bottom of the Y-axis movable block 601 is fixed with a Z-axis guide rail 15, and a Z-axis movable block 1501 is provided on the Z-axis guide rail 15, an L-shaped plate 17 is installed on one side of the Z-axis movable block 1501, and a spray gun 16 is fixed on the L-shaped plate 17, and a nozzle 18 is fixed at the bottom of the spray gun 16.

[0030] Among them: the X-axis guide rail 3, the Y-axis guide rail 6 and the Z-axis guide rail 15 work together to drive the spray gun 16 to move back and forth above the circuit board to be cleaned, and clean various positions of the circuit board. During cleaning, the dry ice particles are accelerated in the high-pressure airflow, sprayed out through the nozzle 18 of the spray gun 16, and impact the surface of the circuit board to be cleaned, so that the cleaning is more comprehensive and efficient, and there is no residue.

[0031] Embodiment 2

[0032] Based on the first embodiment, the solution in the first embodiment is further detailed in combination with the following specific working methods. Figures 1 to 6 As shown, see the following description for details:

[0033] As a preferred embodiment, a dry ice tank 401 is provided at the central position of the top of the dry ice cleaning machine 4, and a sealing cover 5 is hinged on the top of the dry ice tank 401, and the bottom output end of the dry ice cleaning machine 4 is connected to the input end of the spray gun 16 through a hose; further, the design of the dry ice tank 401 and the sealing cover 5 on the top makes it easier to add dry ice to the dry ice cleaning machine 4 and more convenient to operate.

[0034] As a preferred embodiment, the flipping mechanism 7 is symmetrically arranged on both sides of the conveyor belt 8, and the flipping mechanism 7 includes a mounting seat 11, a hydraulic telescopic rod 13 and a clamping seat 14. A ball groove 1101 is opened at the middle position inside the mounting seat 11, and the hydraulic telescopic rod 13 passes through the ball groove 1101. The clamping seat 14 is fixed on the side of the hydraulic telescopic rod 13 close to the conveyor belt 8, and the hydraulic telescopic rod 13 on both sides of the ball groove 1101 is sleeved with a limit sleeve 1301; further, the hydraulic telescopic rod 13 is extended to drive the clamping seat 14 to approach the circuit board to be cleaned, clamp it, and facilitate the flipping operation, and the design is more reasonable.

[0035] As a preferred embodiment, the outer diameter of the hydraulic telescopic rod 13 is in line with the inner diameter of the ball groove 1101, and the limit sleeves 1301 are fixed to the hydraulic telescopic rod 13 by bolts. Tooth rings 1302 are integrally connected to the outer sides of the limit sleeves 1301, and transmission frames 12 are fixed to the bases 1 on the outer sides of the mounting seats 11. Further, the design with matching inner diameters enables the hydraulic telescopic rod 13 to rotate freely within the ball groove 1101. The design of the limit sleeves 1301 allows the hydraulic telescopic rod 13 to only rotate and not move left or right, resulting in a better clamping effect on the circuit board.

[0036] As a preferred embodiment, the transmission frame 12 is designed in an inverted "U" shape, and movable plates 1204 are fixed to both ends of the bottom of the transmission frame 12. Tooth grooves 1201 adapted to the tooth rings 1302 are provided at both ends of one side of the transmission frame 12, and the number of notches of the tooth grooves 1201 is half of the number of teeth of the tooth rings 1302. Further, since the number of notches of the tooth grooves 1201 is half of the number of teeth of the tooth rings 1302, when the tooth rings 1302 move relative to the tooth grooves 1201, only a 180° rotation will occur, that is, the operation of turning over the circuit board is completed, and the design is more reasonable.

[0037] As a preferred embodiment, a first inclined groove 1202 is formed at the middle position of the top of the transmission frame 12, and a second inclined groove 1203 is provided at the middle position of the top of the movable plate 1204. Contact rods 1102 are provided at the middle position of the top of the mounting seat 11 and at the middle positions on both sides of the bottom. The diameters of the contact rods 1102 are in line with the inner diameters of the first inclined groove 1202 and the second inclined groove 1203 respectively. Further, when the hydraulic ejector rod 10 extends, the contact rod 1102 at the top of the mounting seat 11 is inserted into the first inclined groove 1202, and its insertion enables the transmission frame 12 to move along the direction of the sinking groove 101, that is, to separate the tooth ring 1302 from the tooth groove 1201. At this time, when the mounting seat 11 moves downward, it will not cause the circuit board to flip again. When the circuit board to be cleaned is placed back on the conveyor belt 8 and the mounting seat 11 moves downward, the contact rod 1102 at its bottom will be inserted into the second inclined groove 1203, causing the transmission frame 12 to reset, facilitating the smooth implementation of the next flipping operation.

[0038] As a preferred embodiment, an adjusting screw 1401 is threadedly connected to the middle position of the top of the clamping seat 14, and an upper pressing plate 1402 is provided inside the clamping seat 14. The bottom of the adjusting screw 1401 penetrates the top of the clamping seat 14 and is rotatably connected to the upper pressing plate 1402. The upper pressing plate 1402 and the lower half of the clamping seat 14 are both designed with an outward arc expansion on the side close to the conveyor belt 8. Further, the outward arc expansion design makes it easier for the circuit board to be clamped into the clamping seat 14, facilitating the clamping process. The design of the adjusting screw 1401 enables the height of the upper pressing plate 1402 to be adjusted, facilitating the flipping operation of circuit boards with different thicknesses.

[0039] As a preferred embodiment, the sinking groove 101 is designed in an "H" shape, and the movable plate 1204 is slidingly connected to the sinking groove 101; further, the sliding connection allows the movable plate 1204 to move forward and backward along the sinking groove 101, thereby allowing the tooth ring 1302 to separate or engage with the tooth groove 1201, thereby realizing a flipping operation, and the design is more reasonable.

[0040] The working process of the utility model is as follows:

[0041] When in use, the conveyor belt 8 conveys the circuit board to be cleaned to the cleaning station, and the X-axis guide rail 3, the Y-axis guide rail 6 and the Z-axis guide rail 15 work together to drive the spray gun 16 to move back and forth above the circuit board to be cleaned, and clean various positions of the circuit board. During cleaning, the dry ice particles are accelerated in the high-pressure airflow, sprayed out through the nozzle 18 of the spray gun 16, and impact the surface of the circuit board to be cleaned. After the cleaning is completed, the hydraulic telescopic rod 13 extends, driving the clamping seat 14 to approach the circuit board to be cleaned and clamp it, and then the hydraulic push rod 10 extends, driving the mounting seat 11 to move up, and when moving up, the tooth ring 1302 and the tooth groove 1201 of the transmission frame 12 The engagement can make the gear ring 1302 rotate 180°, that is, drive the circuit board to be cleaned to flip 180°, and the hydraulic push rod 10 continues to extend, so that the interference rod 1102 on the top of the mounting seat 11 is inserted into the first inclined groove 1202. The insertion can make the transmission frame 12 move along the direction of the sinking groove 101, that is, the gear ring 1302 is separated from the tooth groove 1201, and then the hydraulic push rod 10 contracts, the mounting seat 11 moves down, and the circuit board to be cleaned is placed back on the conveyor belt 8. When the mounting seat 11 moves down to the bottom, the interference rod 1102 at the bottom of the mounting seat 11 will be inserted into the second inclined groove 1203, so that the transmission frame 12 is reset.

[0042] Finally: The above are only preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A SMT patch welding cleaning device, comprising a base (1), characterized in that: At the four corners of the top of the base (1), columns (2) are fixed, and a dry ice cleaning machine (4) is installed at the top of the columns (2). At the central positions of both ends of the base (1), mounting frames (9) are fixed, and a conveyor belt (8) is arranged between the mounting frames (9). Sinking grooves (101) are formed at the top of the base (1) on both sides of the conveyor belt (8), and hydraulic jacks (10) are installed at the middle positions inside the sinking grooves (101). The top output ends of the hydraulic jacks (10) are fixedly connected with flipping mechanisms (7). At both ends of the bottom of the dry ice cleaning machine (4), X-axis guide rails (3) are arranged, and X-axis movable blocks (301) are installed on the X-axis guide rails (3). A Y-axis guide rail (6) is connected to the bottom of the X-axis movable block (301), and a Y-axis movable block (601) is installed on the Y-axis guide rail (6). A Z-axis guide rail (15) is fixed to the bottom of the Y-axis movable block (601), and a Z-axis movable block (1501) is arranged on the Z-axis guide rail (15). An L-shaped plate (17) is installed on one side of the Z-axis movable block (1501), and a spray gun (16) is fixed to the L-shaped plate (17). A nozzle (18) is fixed to the bottom of the spray gun (16).

2. The SMT patch welding cleaning equipment according to claim 1, characterized in that: A dry ice tank (401) is formed at the central position of the top of the dry ice cleaning machine (4), and a sealing cover (5) is hinged to the top of the dry ice tank (401). The bottom output end of the dry ice cleaning machine (4) is connected to the input end of the spray gun (16) through a hose.

3. The SMT patch welding cleaning equipment according to claim 1, characterized in that: The flipping mechanisms (7) are symmetrically arranged on both sides of the conveyor belt (8), and each flipping mechanism (7) includes a mounting seat (11), a hydraulic telescopic rod (13), and a clamping seat (14). A ball groove (1101) is formed at the middle position inside the mounting seat (11), and the hydraulic telescopic rod (13) passes through the ball groove (1101). Clamping seats (14) are fixed to the sides of the hydraulic telescopic rods (13) close to the conveyor belt (8), and limiting sleeves (1301) are sleeved on the hydraulic telescopic rods (13) on both sides of the ball groove (1101).

4. The SMT patch welding cleaning equipment according to claim 3, characterized in that: The outer diameter of the hydraulic telescopic rod (13) is matched with the inner diameter of the ball groove (1101), and the limiting sleeves (1301) are fixed to the hydraulic telescopic rod (13) through bolts. Tooth rings (1302) are integrally connected to the outer sides of the limiting sleeves (1301), and transmission frames (12) are fixed to the base (1) on the outer sides of the mounting seats (11).

5. The SMT patch welding cleaning equipment according to claim 4, characterized in that: The transmission frame (12) is designed in an inverted "U" shape, and movable plates (1204) are fixed to both ends of the bottom of the transmission frame (12). Tooth grooves (1201) adapted to the tooth rings (1302) are arranged at both ends of one side of the transmission frame (12), and the number of notches of the tooth grooves (1201) is half of the number of teeth of the tooth rings (1302).

6. The SMT patch welding cleaning equipment according to claim 4, characterized in that: A first inclined groove (1202) is provided at the middle position of the top of the transmission frame (12), and a second inclined groove (1203) is provided at the middle position of the top of the movable plate (1204). A resisting rod (1102) is provided at the middle position of the top of the mounting seat (11) and at the middle positions of both sides of the bottom. The diameter of the resisting rod (1102) matches the inner diameter of the first inclined groove (1202) and the second inclined groove (1203), respectively.

7. The SMT patch welding cleaning equipment according to claim 3, characterized in that: An adjusting screw (1401) is threadedly connected at the middle position of the top of the clamping seat (14), and an upper pressure plate (1402) is arranged inside the clamping seat (14). The bottom of the adjusting screw (1401) passes through the top of the clamping seat (14) and is rotatably connected to the upper pressure plate (1402), and the upper pressure plate (1402) and the lower half of the clamping seat (14) are both designed in an arc-shaped outward expansion manner on the side close to the conveyor belt (8).

8. The SMT patch welding cleaning equipment according to claim 5, characterized in that: The sinking trough (101) is designed to be "H" shaped, and the movable plate (1204) is slidably connected to the sinking trough (101).

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