PCB surface hot air type uniform tin spraying device

Abstract

The utility model discloses a PCB board surface hot air type uniform tin spraying device, which relates to the technical field of tin spraying equipment, and comprises a casing and a fixed support, a clamping assembly is installed at the lower part in the casing, and the clamping assembly comprises a box body, a positive and negative rotation motor, a driving shaft, a gear, a rack I, a rack II, an installation seat, a supporting arm, a guide rod, a spring and a clamping plate, a forward and reverse rotation motor is arranged in the middle of the bottom end in the box body, the output end of the forward and reverse rotation motor is connected with a driving shaft, and a gear is arranged outside the driving shaft. According to the PCB surface hot air type uniform tin spraying device, a second servo motor drives a second lead screw to rotate, a second lead screw nut moves in the direction close to or away from the second servo motor, then a telescopic frame is driven to be unfolded or folded, the distance between a first sliding plate, a second sliding plate, a fixing plate, a third sliding plate and a fourth sliding plate is controlled, and the spraying range of a spraying head is adjusted; therefore, the tin spraying device is suitable for tin spraying processing of PCBs with different sizes.

Description

Technical Field

[0001] This utility model relates to the field of tin spraying equipment technology, specifically a hot air uniform tin spraying device for PCB board surface. Background Technology

[0002] With societal development, electronic products are becoming increasingly prevalent and are closely intertwined with our daily lives. Electronic products typically utilize PCB boards, which require tin plating during production. Currently, hot air uniform tin plating equipment is used in PCB manufacturing to improve the uniformity and smoothness of the tin plating process, which is of great significance to the production of electronic products.

[0003] For example, utility model application CN202222984221.X discloses a high-efficiency tin-spraying device for PCB boards. This utility model can place, transport, and complete tin-spraying of at least three PCB boards at a time during tin-spraying operations, avoiding the time wasted on frequent PCB board placement. It also allows for precise adjustment of the tin-spraying head position, resulting in a wider tin-spraying area on the PCB boards and effectively improving the working efficiency and tin-spraying quality of the high-efficiency tin-spraying device. However, since PCB boards vary in size, and the rubber placement tank has a fixed size, it is easy for the PCB boards to shift when facing different sizes, leading to inaccurate tin-spraying positioning.

[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and proposed a hot air uniform tin spraying device for PCB board surface. Utility Model Content

[0005] The purpose of this invention is to provide a hot air uniform tin spraying device for PCB board surface to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a PCB board surface hot air uniform solder spraying device, comprising a housing and a fixed bracket. A clamping assembly is installed inside the lower part of the housing, and the clamping assembly includes a box body, a forward and reverse motor, a drive shaft, a gear, a rack one, a rack two, a mounting base, a support arm, a guide rod, a spring, and a clamping plate. The forward and reverse motor is located in the middle of the bottom of the box body, and the output end of the forward and reverse motor is connected to the drive shaft. A gear is located outside the drive shaft, and rack one and rack two are connected to the outside of the gear. Mounting bases are installed at the ends of rack one and rack two, and support arms are hinged to both ends of the mounting bases. A guide rod is hinged to the other end of the support arm, and a spring is sleeved on the outside of the guide rod. A clamping plate is fixed to the end of the spring away from the box body. The fixed bracket is located in an opening on the surface of the housing, and a servo motor one is installed on the left side of the fixed bracket.

[0007] Furthermore, rack one and rack two are parallel to each other, and rack one and mounting base are perpendicular to each other.

[0008] Furthermore, the number of support arms, guide rods, and springs is the same. The guide rods pass through the through holes on both sides of the box surface. The guide rods and clamps are fixedly connected, and the clamps are elastically connected to the box body through springs.

[0009] Furthermore, the output end of the servo motor is connected to a lead screw, and a lead screw nut is provided on the outside of the lead screw. A movable bracket is installed at the front end of the lead screw nut, and a high-pressure fan is provided at the top rear of the movable bracket.

[0010] Furthermore, the output end of the high-pressure blower is connected to a blower duct via a flexible hose, and the output end of the blower duct is connected to a hot air flow knife via a flexible hose. The blower duct is located on the upper right side of the movable support, and the hot air flow knife is located on the lower right side of the movable support.

[0011] Furthermore, a servo motor 2 is installed at the front end of the movable bracket, and a lead screw 2 is connected to the output end of the servo motor 2. A lead screw nut 2 is connected to the outside of the lead screw nut 2, and a sliding plate 4 is provided on the outside of the lead screw nut 2.

[0012] Furthermore, a sliding rod is provided between the two inner sides of the movable support, and sliding plates one, two, and three are slidably provided on the outside of the sliding rod. A fixing plate is fixed to the middle of the outside of the sliding rod, and a telescopic frame is hinged to the outside of the fixing plate.

[0013] Furthermore, each of the four slides is equipped with a nozzle at its bottom, and the input end of the nozzle is connected to a diversion hose. The other end of the diversion hose is equipped with a pressure pump, and the input end of the pressure pump is equipped with a tin tank. The tin tank is installed at the top center of the movable bracket.

[0014] This utility model provides a hot air uniform solder spraying device for PCB board surface, which has the following beneficial effects:

[0015] 1. In this utility model, the guide rod passes through the through holes on both sides of the box surface. The drive shaft and gear are rotated by the forward and reverse motor, so that rack one and rack two are displaced in opposite directions under the drive of the gear. This can slowly change the angle of the support arm, so that the clamping plate overcomes the elastic force of the spring and moves closer to the side of the PCB board until the two sides of the PCB board are clamped and fixed, thereby avoiding the displacement of the PCB board due to external impact and reducing the occurrence of defective products.

[0016] 2. This utility model uses a servo motor to drive a lead screw to rotate, causing the lead screw nut to move closer to or further away from the servo motor, thereby driving the telescopic frame to unfold or fold, thus controlling the distance between slide plate one, slide plate two, fixed plate, slide plate three, and slide plate four, and adjusting the spraying range of the nozzle to adapt to the tin plating process of PCB boards of different sizes. Attached Figure Description

[0017] Figure 1 This is a top view cross-sectional structural diagram of the housing of a PCB board surface hot air uniform tin spraying device according to the present invention.

[0018] Figure 2 This is a top view cross-sectional structural diagram of the box body of a hot air uniform tin spraying device for PCB board surface according to the present invention.

[0019] Figure 3 This is a side view of the movable support structure of a hot air uniform tin spraying device for PCB board surface according to the present invention.

[0020] Figure 4 This is a schematic diagram of the three-dimensional structure of the housing of a hot air uniform tin spraying device for PCB board surface according to the present invention.

[0021] In the diagram: 1. Housing; 2. Clamping assembly; 201. Box body; 202. Forward and reverse motor; 203. Drive shaft; 204. Gear; 205. Rack 1; 206. Rack 2; 207. Mounting base; 208. Support arm; 209. Guide rod; 210. Spring; 211. Clamping plate; 3. Fixed bracket; 4. Servo motor 1; 5. Lead screw 1; 6. Lead screw nut 1; 7. Moving bracket; 8. High-pressure blower; 9. Air duct; 10. Hot air flow knife; 11. Servo motor 2; 12. Lead screw 2; 13. Lead screw nut 2; 14. Slide rod; 15. Slide plate 1; 16. Slide plate 2; 17. Fixed plate; 18. Slide plate 3; 19. Slide plate 4; 20. Telescopic frame; 21. Nozzle; 22. Diverting hose; 23. Pressure pump; 24. Tin tank. Detailed Implementation

[0022] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0023] like Figure 2As shown, a PCB board surface hot air uniform solder spraying device includes a housing 1 and a fixed bracket 3. A clamping assembly 2 is installed inside the lower part of the housing 1. The clamping assembly 2 includes a box body 201, a forward / reverse motor 202, a drive shaft 203, a gear 204, a rack 1 205, a rack 206, a mounting base 207, a support arm 208, a guide rod 209, a spring 210, and a clamping plate 211. The forward / reverse motor 202 is located in the middle of the bottom of the box body 201, and the output end of the forward / reverse motor 202 is connected to the drive shaft 203. A gear 204 is located outside the drive shaft 203, and rack 1 205 and rack 206 are connected to the outside of the gear 204. Mounting bases 207 are installed at the ends of rack 1 205 and rack 206. 7. Support arms 208 are hinged to both ends of the mounting base 207, and guide rods 209 are hinged to the other end of the support arms 208. Springs 210 are sleeved on the outside of the guide rods 209. A clamping plate 211 is fixed to the end of the springs 210 away from the box body 201. Rack 1 205 and rack 206 are parallel to each other, and rack 1 205 and mounting base 207 are perpendicular to each other. The number of support arms 208, guide rods 209 and springs 210 is the same. The guide rods 209 pass through the through holes on both sides of the surface of the box body 201. The guide rods 209 and clamping plates 211 are fixedly connected, and clamping plates 211 are elastically connected to the box body 201 through springs 210. The fixing bracket 3 is set in the opening on the surface of the housing 1, and a servo motor 4 is installed on the left side of the fixing bracket 3.

[0024] The specific operation is as follows: Since the guide rod 209 passes through the through holes on both sides of the surface of the box 201, the drive shaft 203 and gear 204 are driven to rotate by the forward and reverse motor 202. This causes the rack 1 205 and rack 2 206 to move in opposite directions under the drive of the gear 204. This can slowly change the angle of the support arm 208, so that the clamping plate 211 overcomes the elastic force of the spring 210 and moves closer to the side of the PCB board until the two sides of the PCB board are clamped and fixed. This prevents the PCB board from being displaced by external force impact and reduces the occurrence of defective products.

[0025] like Figure 1 , Figure 3 and Figure 4As shown, the output end of servo motor 4 is connected to lead screw 5, and lead screw nut 6 is provided on the outside of lead screw 5. A movable bracket 7 is installed at the front end of lead screw nut 6, and a high-pressure fan 8 is installed at the top rear of the movable bracket 7. The output end of the high-pressure fan 8 is connected to a blower 9 through a hose, and the output end of the blower 9 is connected to a hot air knife 10 through a hose. The blower 9 is located on the upper right side of the movable bracket 7, and the hot air knife 10 is located on the lower right side of the movable bracket 7. A servo motor 11 is installed at the front end of the movable bracket 7, and lead screw 12 is connected to the output end of servo motor 11. The external part of lead screw 12 is connected to... A screw nut 213 is connected, and a sliding plate 4 19 is provided on the outside of the screw nut 213. A sliding rod 14 is provided between the two sides inside the movable bracket 7, and sliding plates 15, 16 and 3 18 are slidably provided on the outside of the sliding rod 14. A fixing plate 17 is fixed to the middle of the outside of the sliding rod 14, and a telescopic frame 20 is hinged to the outside of the fixing plate 17. A nozzle 21 is installed at the bottom of each sliding plate 4 19, and a diversion hose 22 is connected to the input end of the nozzle 21. A pressure pump 23 is provided at the other end of the diversion hose 22, and a tin tank 24 is provided at the input end of the pressure pump 23. The tin tank 24 is installed at the top middle of the movable bracket 7.

[0026] The specific operation is as follows: the servo motor 211 drives the lead screw 22 to rotate, causing the lead screw nut 213 to move closer to or further away from the servo motor 21, thereby driving the telescopic frame 20 to unfold or fold, thereby controlling the distance between the slide plate 15, slide plate 26, fixed plate 17, slide plate 3 18, and slide plate 4 19, and adjusting the spraying range of the nozzle 21 to adapt to the tin plating process of PCB boards of different sizes.

[0027] In summary, when using this PCB board surface hot air uniform solder spraying device, the PCB board to be processed is first placed on the box 201, and then the forward and reverse motor 202 is started to drive the drive shaft 203 and gear 204 to rotate. The gear 204 meshes with rack 1 205 and rack 2 206 respectively, causing the two mounting seats 207 to move away from each other, thereby changing the support angle of the support arm 208 on the guide rod 209. This allows the clamping plate 211 to overcome the elastic force of the spring 210 and move closer to the side of the PCB board. The clamping plate 211 clamps and fixes the two sides of the PCB board to prevent the PCB board from being displaced by external force impact during processing, thereby reducing the occurrence of defective products.

[0028] Next, the position of the nozzle 21 is adjusted according to the size of the PCB board. That is, the servo motor 211 drives the lead screw 22 to rotate, so that the lead screw nut 213 moves closer to or away from the servo motor 211, thereby driving the telescopic frame 20 to unfold or fold, so that the slide plate 15, slide plate 26, slide plate 38, and slide plate 49 slide about the outside of the slide bar 14 until the distance between the nozzles 21 at the bottom of the slide plate 15 and slide plate 419 matches the width of the PCB board.

[0029] Next, the PCB board is tinned using a pressure pump 23, a diversion hose 22, and a nozzle 21. During the tinning process, a servo motor 4 drives a lead screw 5 to rotate, causing the lead screw nut 6 and the moving bracket 7 to move horizontally. This results in a more uniform tinning coverage on the PCB board and a better coating effect. After tinning, a high-pressure blower 8 generates high-pressure air, which is then blown out at an angle through the outlet of a hot air blade 10 to create a powerful heat seal. This facilitates the leveling of the tin material on the PCB board surface, thereby optimizing the tinning effect and improving the processing quality of the PCB board.

[0030] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A PCB board surface hot air uniform solder spraying device, comprising a housing (1) and a fixing bracket (3), characterized in that, A clamping assembly (2) is installed inside the lower part of the housing (1), and the clamping assembly (2) includes a box (201), a forward and reverse motor (202), a drive shaft (203), a gear (204), a rack one (205), a rack two (206), a mounting base (207), a support arm (208), a guide rod (209), a spring (210), and a clamping plate (211). The forward and reverse motor (202) is provided in the middle of the bottom of the box (201), and the output end of the forward and reverse motor (202) is connected to the drive shaft (203). A gear (204) is provided on the outside of the drive shaft (203), and the gear (204) is connected to the drive shaft (203). 204) is externally connected to rack one (205) and rack two (206). The ends of rack one (205) and rack two (206) are each equipped with a mounting base (207). The two ends of the mounting base (207) are hinged with support arms (208). The other end of the support arm (208) is hinged with a guide rod (209). The guide rod (209) is sleeved with a spring (210). The end of the spring (210) away from the box body (201) is fixed with a clamping plate (211). The fixed bracket (3) is set in the opening on the surface of the housing (1). The left side of the fixed bracket (3) is equipped with a servo motor one (4).

2. The PCB board surface hot air uniform solder spraying device according to claim 1, characterized in that, The rack one (205) and rack two (206) are parallel to each other, and the rack one (205) and the mounting base (207) are perpendicular to each other.

3. The PCB board surface hot air uniform tin spraying device according to claim 1, characterized in that, The number of support arms (208), guide rods (209) and springs (210) are the same. The guide rods (209) pass through the through holes on both sides of the surface of the box body (201). The guide rods (209) and clamps (211) are fixedly connected, and the clamps (211) are elastically connected to the box body (201) through springs (210).

4. The PCB board surface hot air uniform solder spraying device according to claim 1, characterized in that, The output end of the servo motor (4) is connected to a lead screw (5), and a lead screw nut (6) is provided on the outside of the lead screw (5). A movable bracket (7) is installed at the front end of the lead screw nut (6), and a high-pressure fan (8) is provided at the top rear of the movable bracket (7).

5. The PCB board surface hot air uniform tin spraying device according to claim 4, characterized in that, The output end of the high-pressure blower (8) is connected to the air duct (9) via a hose, and the output end of the air duct (9) is connected to the hot air flow knife (10) via a hose. The air duct (9) is located on the upper right side of the movable support (7), and the hot air flow knife (10) is located on the lower right side of the movable support (7).

6. The PCB board surface hot air uniform tin spraying device according to claim 4, characterized in that, The front end of the movable support (7) is equipped with a servo motor 2 (11), and the output end of the servo motor 2 (11) is connected to a lead screw 2 (12). The lead screw 2 (12) is externally connected to a lead screw nut 2 (13), and a sliding plate 4 (19) is provided on the outside of the lead screw nut 2 (13).

7. A PCB board surface hot air uniform tin spraying device according to claim 6, characterized in that, A slide rod (14) is provided between the two sides inside the movable support (7), and slide plates one (15), two (16) and three (18) are slidably provided on the outside of the slide rod (14). A fixing plate (17) is fixed at the middle of the outside of the slide rod (14), and a telescopic frame (20) is hinged to the outside of the fixing plate (17).

8. A PCB board surface hot air uniform tin spraying device according to claim 7, characterized in that, The bottom of each of the four slides (19) is equipped with a nozzle (21), and the input end of the nozzle (21) is connected to a diversion hose (22). The other end of the diversion hose (22) is equipped with a pressure pump (23), and the input end of the pressure pump (23) is equipped with a tin tank (24). The tin tank (24) is installed at the top middle of the movable bracket (7).

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