Automatic welding machine for circuit board

Abstract

The utility model discloses an automatic welding machine for a circuit board, and relates to the technical field of circuit board production. Comprising a machine shell, a PLC is embedded in the front side of the left end of the machine shell, a Z-axis linear module is installed in the left end of the machine shell, a fixing plate is installed on a sliding table of the Z-axis linear module, an X-axis linear module is installed on the fixing plate, and a finger clamping air cylinder is installed on a sliding table of the X-axis linear module. According to the automatic welding machine for the circuit board, the circuit board is placed on the clamping arm and clamped and fixed through the finger clamping air cylinder, the circuit board is lowered into a scaling powder pot through the Z-axis linear module, the circuit board is immersed in scaling powder to be coated, and then the Z-axis linear module drives the circuit board to ascend and reset; at the moment, the X-axis linear module drives the circuit board to transversely move to the position above the tin pot, then the Z-axis linear module lowers the circuit board into the tin pot, the circuit board is immersed in tin liquid to achieve tin soldering and automatic tin soldering operation, and the tin soldering efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board production, in particular to an automatic circuit board soldering machine. Background Technique

[0002] In the assembly production process of electronic products, it is usually necessary to install electronic components on a circuit board (printed circuit board) and then fix the electronic components on the circuit board through soldering. Currently, the commonly used soldering methods mainly include dip soldering, wave soldering, reflow soldering, etc. For circuit boards using through-hole insertion, dip soldering is mainly used. Dip soldering is to dip the circuit board with inserted electronic components into molten liquid tin to complete the soldering of numerous solder joints at one time.

[0003] The dip soldering process of the circuit board is as follows: First, immerse the circuit board with inserted electronic components in the form of a flux tank or spray, so that the soldering surface of the circuit board and the pins of the components are coated with flux. Then, immerse the soldering surface of the printed circuit board and the pins of the components into the tin tank with liquid tin, take it out after the soldering surface of the printed circuit board and the pins of the components come into contact with the liquid tin, and the tin will be soldered on the soldering surface of the printed circuit board and the pins of the components, thus completing the soldering of the circuit board.

[0004] However, in the existing dip soldering process, the circuit board is usually held by hand for dip soldering, with low dip soldering efficiency and it is difficult to keep the dip soldering processability of each circuit board consistent. Content of the Utility Model

[0005] The utility model provides an automatic circuit board soldering machine to solve the problems in the background technique.

[0006] To achieve the above object, the utility model provides the following technical solution: An automatic circuit board soldering machine includes a machine shell. A PLC controller is embedded in the front side of the left end of the machine shell. A Z-axis linear module is installed inside the left end of the machine shell, and a fixing plate is installed on the slide table of the Z-axis linear module. An X-axis linear module is installed on the fixing plate, and a finger cylinder is installed on the slide table of the X-axis linear module. Clamping arms are installed on the two clamping claws of the finger cylinder. A flux pot and a tin pot are respectively installed inside the right end of the machine shell. An electric heating plate and a temperature sensor are respectively fixed to the bottom of the tin pot. A machine cover is installed at the right end of the machine shell, and a side smoke duct is provided at the inner wall of the machine cover. A filter chamber is provided at the rear of the machine cover, and the upper part of the filter chamber is communicated with the side smoke duct. An activated carbon filter is installed in the upper part of the filter chamber, and a centrifugal fan is installed in its lower part. The Z-axis linear module, X-axis linear module, electric heating plate, temperature sensor and centrifugal fan are all electrically connected to the PLC controller.

[0007] Furthermore, a solenoid valve is installed inside the left end of the machine shell, and the solenoid valve is electrically connected to the PLC controller.

[0008] Furthermore, a quick connector is embedded on the left side wall of the casing, and the quick connector is connected to the solenoid valve through a hose, and the solenoid valve is connected to the finger-clamping cylinder through a hose.

[0009] Furthermore, a strip-shaped hole is opened on the left side wall of the housing, and one end of the fixing plate extends outward from the strip-shaped hole.

[0010] Furthermore, the finger-gripping cylinder is located above the flux pot, and the tops of the flux pot and the tin pot are flush with each other.

[0011] Furthermore, heat insulation cotton is attached to the inner wall of the right end of the casing, and the heat insulation cotton is arranged around the tin pot.

[0012] Furthermore, an air outlet is provided at the bottom of the filter chamber, and the outlet end of the centrifugal fan is connected to the air outlet.

[0013] Compared with the prior art, this utility model provides a circuit board automatic welding machine with the following

[0014] Beneficial effects:

[0015] This automatic circuit board welding machine places the circuit board on the clamping arm and clamps it with a clamping cylinder. The Z-axis linear module lowers the circuit board into the flux pot, immerses the circuit board in the flux to achieve coating, and then the Z-axis linear module drives the circuit board to rise and reset. At this time, the X-axis linear module drives the circuit board to move horizontally above the tin pot. Then, the Z-axis linear module lowers the circuit board into the tin pot, immerses the circuit board in the tin liquid to achieve soldering, and automates the soldering operation, which is conducive to improving soldering efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 It is a cross-sectional view of the utility model;

[0018] Figure 3 It is a partial side sectional view of the present utility model.

[0019] In the figure: 1. Housing; 2. PLC controller; 3. Z-axis linear module; 4. Fixing plate; 5. X-axis linear module; 6. Clamping cylinder; 7. Clamping arm; 8. Flux pot; 9. Tin pot; 10. Electric heating plate; 11. Temperature sensor; 12. Machine cover; 13. Side smoke duct; 14. Filter chamber; 15. Activated carbon filter; 16. Centrifugal fan; 17. Solenoid valve; 18. Quick connector; 19. Strip hole; 20. Insulation cotton; 21. Air outlet. DETAILED DESCRIPTION

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0021] Please refer to Figures 1 - 3 , the present utility model discloses an automatic circuit board soldering machine, which includes a machine shell 1. A PLC controller 2 is embedded in the front side of the left end of the machine shell 1. A Z-axis linear module 3 is installed inside the left end of the machine shell 1, and a fixing plate 4 is installed on the slide table of the Z-axis linear module 3. An X-axis linear module 5 is installed on the fixing plate 4, and a finger clamping cylinder 6 is installed on the slide table of the X-axis linear module 5. Clamping arms 7 are installed on the two clamping claws of the finger clamping cylinder 6. A soldering flux pot 8 and a tin pot 9 are respectively installed inside the right end of the machine shell 1, and an electric heating plate 10 and a temperature sensor 11 are respectively fixedly installed at the bottom of the tin pot 9. Place the circuit board on the clamping arm 7 and clamp and fix it through the finger clamping cylinder 6. Lower the circuit board into the soldering flux pot 8 through the Z-axis linear module 3. After the circuit board is immersed in the soldering flux for coating, the Z-axis linear module 3 drives the circuit board to rise and reset. At this time, the X-axis linear module 5 drives the circuit board to move horizontally above the tin pot 9, and then the Z-axis linear module 3 lowers the circuit board into the tin pot 9, and the circuit board is immersed in the tin liquid to achieve soldering. The automatic soldering operation is beneficial to improving the soldering efficiency. A machine cover 12 is installed at the right end of the machine shell 1, and a side smoke duct 13 is provided at the inner wall of the machine cover 12. A filter chamber 14 is provided at the rear side of the machine cover 12, and the upper part of the filter chamber 14 is communicated with the side smoke duct 13. An activated carbon filter 15 is installed at the upper part of the filter chamber 14, and a centrifugal fan 16 is installed at its lower part. The Z-axis linear module 3, the X-axis linear module 5, the electric heating plate 10, the temperature sensor 11 and the centrifugal fan 16 are all electrically connected to the PLC controller 2.

[0022] Specifically, a solenoid valve 17 is installed inside the left end of the machine shell 1, and the solenoid valve 17 is electrically connected to the PLC controller 2.

[0023] In this implementation scheme, the solenoid valve 17 is one of the most commonly used control components in the pneumatic circuit. It can convert an electrical signal into a mechanical action to control the on-off and direction change of the air circuit. The PLC controller 2 is a digital operation controller with a microprocessor for automation control. Instructions for performing operations such as logical operations, sequential control, timing, counting, and arithmetic operations are stored inside it, and various types of mechanical equipment or production processes are controlled through digital or analog inputs and outputs.

[0024] Specifically, a quick connector 18 is embedded on the left side wall of the housing 1 , and the quick connector 18 is connected to the solenoid valve 17 through a hose, and the solenoid valve 17 is connected to the finger-gripping cylinder 6 through a hose.

[0025] In this embodiment, the quick connector 18 is a connector that can connect or disconnect pipelines without the need for tools, and is used to connect to an external gas pipeline to provide an air source for the finger cylinder 6 .

[0026] Specifically, a strip-shaped hole 19 is opened on the left side wall of the housing 1 , and one end of the fixing plate 4 extends outward from the strip-shaped hole 19 .

[0027] In this embodiment, the strip-shaped hole 19 is a position-avoiding structure, so that the fixing plate 4 can be lifted up and down under the action of the Z-axis linear module 3 .

[0028] Specifically, the finger-gripping cylinder 6 is located above the flux pot 8 , and the tops of the flux pot 8 and the tin pot 9 are flush with each other.

[0029] In this embodiment, during soldering operation, a certain amount of flux is poured into the flux pot 8, a certain amount of tin block is placed into the tin pot 9, and the tin pot 9 is heated by the electric heating plate 10 to melt the tin block into tin liquid.

[0030] Specifically, the inner wall of the right end of the housing 1 is attached with heat insulation cotton 20, and the heat insulation cotton 20 is arranged around the tin pot 9.

[0031] In this embodiment, the main function of the thermal insulation cotton 20 is thermal insulation, which can effectively prevent heat transfer, thereby protecting the surface of the covered object from being affected by high or low temperatures.

[0032] Specifically, an air outlet 21 is provided at the bottom of the filter chamber 14 , and an outlet end of the centrifugal fan 16 is connected to the air outlet 21 .

[0033] In this embodiment, welding smoke is generated during the tinning process. At this time, the centrifugal fan 16 is turned on for exhaust. The welding smoke is sucked into the filter chamber 14 from the side smoke duct 13 and filtered through the activated carbon filter 15 to effectively remove oil smoke and odor.

[0034] During use, the circuit board is placed on the clamping arm 7 and clamped and fixed by the clamping finger cylinder 6. The circuit board is lowered into the flux pot 8 through the Z-axis linear module 3, so that the circuit board is immersed in the flux to achieve coating. The Z-axis linear module 3 drives the circuit board to rise and reset. At this time, the X-axis linear module 5 drives the circuit board to move horizontally to above the tin pot 9, and then the Z-axis linear module 3 lowers the circuit board into the tin pot 9, so that the circuit board is immersed in the tin liquid to achieve soldering. The soldering operation is automated, which is conducive to improving soldering efficiency.

[0035] In summary, for the automatic circuit board soldering machine, the circuit board is placed on the clamping arm 7 and clamped and fixed by the finger cylinder 6. After the circuit board is lowered into the flux pot 8 by the Z-axis linear module 3 and immersed in the flux to achieve coating, the Z-axis linear module 3 drives the circuit board to rise and reset. At this time, the X-axis linear module 5 drives the circuit board to move horizontally above the solder pot 9, and then the Z-axis linear module 3 lowers the circuit board into the solder pot 9 to immerse the circuit board in the molten solder to achieve soldering. The automatic soldering operation is conducive to improving the soldering efficiency.

[0036] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic circuit board soldering machine, comprising a machine housing (1), characterized in that: A PLC controller (2) is embedded in the front side of the left end of the machine case (1). A Z-axis linear module (3) is installed inside the left end of the machine case (1), and a fixing plate (4) is installed on the slide table of the Z-axis linear module (3). An X-axis linear module (5) is installed on the fixing plate (4), and a finger cylinder (6) is installed on the slide table of the X-axis linear module (5). Clamping arms (7) are installed on the two clamping claws of the finger cylinder (6). A soldering flux pot (8) and a tin pot (9) are respectively installed inside the right end of the machine case (1), and an electric heating plate (10) and a temperature sensor (11) are respectively and fixedly installed at the bottom of the tin pot (9). A machine cover (12) is installed at the right end of the machine case (1), and a side smoke exhaust duct (13) is provided at the inner wall of the machine cover (12). A filter chamber (14) is provided at the rear side of the machine cover (12), and the upper part of the filter chamber (14) is communicated with the side smoke exhaust duct (13). An activated carbon filter (15) is installed at the upper part of the filter chamber (14), and a centrifugal fan (16) is installed at its lower part. The Z-axis linear module (3), the X-axis linear module (5), the electric heating plate (10), the temperature sensor (11), and the centrifugal fan (16) are all electrically connected to the PLC controller (2).

2. The automatic circuit board soldering machine according to claim 1, wherein: A solenoid valve (17) is installed inside the left end of the machine case (1), and the solenoid valve (17) is electrically connected to the PLC controller (2).

3. The automatic circuit board soldering machine according to claim 2, wherein: A quick connector (18) is embedded in the side wall of the left end of the machine case (1), and the quick connector (18) is connected to the solenoid valve (17) through a hose. The solenoid valve (17) is connected to the finger cylinder (6) through a hose.

4. An automatic circuit board soldering machine according to claim 1, characterized in that: A strip-shaped hole (19) is formed in the side wall of the left end of the machine case (1), and one end of the fixing plate (4) extends outwards from the strip-shaped hole (19).

5. An automatic circuit board soldering machine according to claim 1, characterized in that: The finger cylinder (6) is located above the soldering flux pot (8), and the tops of the soldering flux pot (8) and the tin pot (9) are flush with each other.

6. The automatic circuit board soldering machine according to claim 1, wherein: Heat insulation cotton (20) is attached to the inner wall of the right end of the machine case (1), and the heat insulation cotton (20) is arranged around the tin pot (9).

7. A circuit board automatic soldering machine according to claim 1, characterized in that: An air outlet (21) is provided at the bottom of the filter chamber (14), and the outlet end of the centrifugal fan (16) is docked with the air outlet (21).

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