CN114700219B

CN114700219B - Rapid glue dispensing device and method for PCB processing

Info

Publication number: CN114700219B
Application number: CN202210276853.2A
Authority: CN
Inventors: 岳万超
Original assignee: Shenzhen Sensiyuan Electronics Co ltd
Current assignee: Shenzhen Sensiyuan Electronics Co ltd
Priority date: 2022-03-21
Filing date: 2022-03-21
Publication date: 2023-02-14
Anticipated expiration: 2042-03-21
Also published as: CN114700219A

Abstract

The invention discloses a quick glue dispensing device and a quick glue dispensing method for processing a PCB (printed circuit board), wherein the quick glue dispensing device comprises a left glue dispensing rack, a right glue dispensing rack and a glue dispensing platform, a cylinder fixing plate is positioned above a transverse partition plate, a guide plate capable of sliding up and down is connected to the transverse partition plate, a glue dispensing arm fixing plate is connected to the guide plate through a welding plate, a plurality of glue dispensing arms are connected to the end face of the left side of the glue dispensing arm fixing plate, a glue dispensing arm connecting plate is connected to the glue dispensing arms, a cylinder A and a cylinder B are connected to the cylinder fixing plate, the cylinder A is connected to the guide plate, and the cylinder B is connected to the glue dispensing arm connecting plate. The traditional single-point glue arm glue dispensing is changed into the multiple glue dispensing arms for dispensing at the same time, so that the glue dispensing efficiency of the traditional piston pump glue dispensing is improved; meanwhile, the distance between the dispensing arm and the PCB is adjusted by pressure induction, so that a proper distance is kept between the dispensing arm and the PCB, and the probability of wire drawing/tailing phenomenon in the dispensing process is greatly reduced.

Description

Rapid glue dispensing device and method for PCB processing

Technical Field

The invention relates to a PCB (printed circuit board) dispenser, in particular to a quick dispensing device and a quick dispensing method for PCB processing, and belongs to the field of PCB processing equipment application.

Background

The glue dispensing is a process, also called glue applying, glue spreading, glue pouring, glue dripping and the like, and is used for smearing, encapsulating and dripping electronic glue, oil or other liquid on a product, so that the product has the effects of sticking, encapsulating, insulating, fixing, smoothing the surface and the like.

The circuit board uses the point gum machine to carry out circuit board point and glues processing, mainly used is waterproof, dustproof, anticorrosion. Nowadays, many enterprises put forward higher level requirements on usability and stability of electronic products, and the dispensing processing of circuit boards has become an essential process. The long-term effective protection is well carried out on the sensitive circuit boards of some electronic equipment and some electronic components, which is undoubtedly an embodiment of the increasingly important function of the application of the electronic equipment with the current precision and high requirements.

The dispensing machine is divided into a contact dispensing machine and a non-contact dispensing machine, at present, most enterprises use contact dispensing, and the contact dispensing machine is divided into three types, namely time-pressure dispensing, screw pump dispensing and piston pump dispensing. The time-pressure glue dispensing technology comprises a pressure stabilizing device, a control device and a gas circuit, wherein in the glue dispensing process, a gas outlet valve is connected with the bottom of a needle cylinder, a gas pressure control device is regulated, an operation system is started, high-pressure gas is conveyed into the needle cylinder, a piston is pushed to enable glue to flow out of a needle head, and in the process, the glue discharging quality on a substrate can be controlled according to the set gas pressure and the set operation time. The screw pump dispensing technology adopts a newly designed Archimedes metering tube dispensing head to improve dispensing performance, and the mode is that acting force is generated through screw rotation to push glue solution, so that the glue moves along a spiral line and is extruded out from the dispensing head, and the acting force of the screw overcomes the resistance inside the glue and on the dispensing head to further control the dispensing amount. The piston pump dispensing technology is that a motor drives a piston to seal a cylinder and push glue solution in a cavity to be extruded out from a dispensing head.

The piston pump dispensing mode is essentially based on the volume dispensing of the fluid in the cylinder, the viscosity of the glue body is not required to be considered, the glue outlet amount is insensitive to the change of the environmental temperature and the pressure, and the consistency is good, so the application range is wide, but the dispensing efficiency of the piston pump dispensing is low, and the phenomena of wire drawing/trailing and the like are easily generated in the dispensing process.

Chinese patent CN203620879U discloses an automatic dispensing machine for PCB, which is composed of a base, a support rod, an X-axis adjusting rod, a dispensing machine head, a Y-axis conveying device, a Z-axis adjusting rod, a communication interface, a display screen and an operation keyboard.

Disclosure of Invention

The invention aims to provide a quick glue dispensing device and method for processing a PCB (printed circuit board) in order to solve the problems of low glue dispensing efficiency in a piston pump glue dispensing mode, wire drawing/trailing generation in the glue dispensing process and the like.

The invention achieves the purpose through the following technical scheme, and the quick glue dispensing device for processing the PCB comprises a left glue dispensing rack, a right glue dispensing rack and a glue dispensing platform, wherein the glue dispensing platform is positioned between the left glue dispensing rack and the right glue dispensing rack, one glue dispensing rack is connected with a PLC (programmable logic controller), the PLC is connected with a start switch, a pause switch, a reset switch and a close switch, a transverse partition plate and a cylinder fixing plate are connected between the left glue dispensing rack and the right glue dispensing rack, the cylinder fixing plate is positioned above the transverse partition plate, the transverse partition plate is connected with a guide plate capable of sliding up and down, the guide plate is connected with a glue dispensing arm fixing plate through a welding plate, the end face of the left side of the glue dispensing arm fixing plate is connected with a plurality of glue dispensing arms, the glue dispensing platform is positioned right below the glue dispensing arms, the glue dispensing arms are connected with a glue dispensing arm connecting plate, the cylinder fixing plate is connected with a cylinder A and a cylinder B, the cylinder A is connected with the guide plate, the cylinder B is connected with a glue dispensing arm protecting cover, and the cylinder A and the cylinder B are both electrically connected with the glue dispensing controller.

Preferably, the diaphragm plate is of a hollow structure, the piston rod through groove is formed in the upper surface of the diaphragm plate, the two connecting rod through grooves are formed in the end face of the right side of the diaphragm plate, the two connecting rods are connected to the end face of the left side of the guide plate, the front end of each connecting rod is connected with the guide plate pressing plate, at least two spring columns A are connected to the bottom surface of the guide plate pressing plate, the guide plate pressing plate is embedded in the diaphragm plate, the bottoms of the spring columns A are fixed to the bottom surface of the inside of the diaphragm plate, the connecting rods penetrate through the piston rod through grooves, and piston rods on the air cylinders A penetrate through the piston rod through grooves and are connected to the guide plate pressing plate.

Preferably, be equipped with two "T" type recesses on the deflector right side terminal surface, it is connected with two "T" type stoppers on the arm connecting plate left side wall to glue, "T" type stopper inlays in "T" type recess, the arm is glued to the point is located the deflector with glue between the arm fixed plate, piston rod on the cylinder B with it links to each other to glue the arm connecting plate.

Preferably, the dispensing arm includes a glue outlet cylinder and a glue outlet head, the glue outlet head is connected to the bottom of the glue outlet cylinder, a piston is arranged in the glue outlet cylinder, a glue outlet pressing block is connected to the piston through a connecting shaft, the glue outlet pressing block is connected to the connecting plate of the dispensing arm, a limiting panel is fixed in the glue outlet cylinder, the limiting panel is located between the piston and the glue outlet pressing block, a spring column B is connected between the limiting panel and the glue outlet pressing block, and the connecting shaft penetrates through the limiting panel.

Preferably, the platform surface is glued to the point is equipped with pressure sensor, pressure sensor with controller electric connection is glued to PLC point, the deflector bottom is connected with the pressure point feeler lever, the pressure point feeler lever is located directly over the pressure sensor, the pressure point feeler lever includes interior pole and outer tube, interior pole bottom is connected with interior pole extension bar, interior pole inlays to be established in the outer tube, the diameter of interior pole extension bar is less than the internal diameter of outer tube, in the interior pole extension bar outer tube connection has the screw pin, bolted connection has the camber connecting block on the terminal surface in the screw pin, the laminating of camber connecting block is in on the interior pole extension bar lateral wall.

Preferably, the platform is glued including the conveying frame to the point, be connected with servo motor A on the conveying frame lateral wall, servo motor A with controller electric connection is glued to the PLC point, conveying frame in-connection has two pivots, one of them pivot with servo motor A links to each other, the cover is equipped with the conveyer belt between two pivots, the PCB circuit board has been placed on the conveyer belt, be connected with the curing box on the conveying frame, be connected with servo motor B on the curing box, curing box internal connection has the fan, servo motor B with the fan links to each other.

Preferably, the surface of the rotating shaft is connected with a plurality of limiting strips, a plurality of limiting grooves are formed in the inner end face of the conveyor belt, and the limiting strips are embedded in the limiting grooves.

Preferably, the conveyer belt surface is equipped with a plurality of PCB circuit board screens board, the conveyer belt surface is connected with a plurality of soft magnetic stripe, the PCB circuit board card is established on the PCB circuit board screens board, PCB circuit board screens board bottom is connected with the magnet piece, magnet piece magnetism adsorbs on the soft magnetic stripe, be connected with infrared receiver on the transport frame, infrared receiver with PLC point glues controller electric connection, be connected with infrared transmitter on the PCB circuit board screens board, be connected with the board of rejecting that is the slope structure on the transport frame discharge end, reject the board front end with the conveyer belt offsets.

Preferably, PCB circuit board screens board upper surface is equipped with two pairs of spring post recesses, two cardboard recesses and a plurality of setpoint of gluing, and two cardboard recesses are connected respectively between two pairs of spring post recesses, just the cardboard recess with spring post recess is linked together, spring post recess internal fixation has spring post C, be connected with the screens panel on the spring post C, be connected with the cardboard strip between two screens panels, the cardboard strip inlays in the cardboard recess.

A quick glue dispensing method for processing a PCB comprises the following steps,

s1, debugging the downward moving distance of the dispensing arm

Firstly, a PCB is clamped between two clamping strip plates, glue dispensing positions on the PCB correspond to glue dispensing positioning points on the PCB clamping plates, then the PCB clamping plates with the same quantity as the glue dispensing arms are fixed on a conveyor belt in a magnetic adsorption mode, an initial switch is turned on, a cylinder A controls a guide plate to move downwards, glue dispensing arms connected with the guide plate move downwards, when a pressure point contact rod touches a pressure sensor, a PLC glue dispensing controller controls the cylinder A to stop moving, and simultaneously controls a cylinder B to work, the cylinder B moves downwards and drives a glue discharging pressing block to move downwards, a piston extrudes glue in a glue discharging cylinder while the glue discharging pressing block moves downwards, and a glue discharging head sprays the glue on the PCB; pressing a pause switch, observing the dispensing state on the PCB, and if dispensing wire drawing/tail stripping occurs, indicating that the distance between a glue head and the PCB is too long and the length of a pressure point contact rod needs to be shortened;

s2, adjusting the length of the pressure point contact rod

Loosening the threaded pin, moving the outer pipe up and down until the pressure point contact rod is adjusted to a proper length, and then screwing the threaded pin;

s3, dispensing with a plurality of dispensing arms simultaneously

After the downward moving distance of the dispensing arm is adjusted, the PCB is clamped on a PCB clamping plate, the PCB clamping plate is magnetically adsorbed on a conveyor belt, an initial switch is turned on, the cylinder A controls the dispensing arm to move downwards to a set height, the servo motor A drives the conveyor belt to convey forwards, when an infrared transmitter on the PCB clamping plate is opposite to an infrared receiver, the infrared receiver transmits a signal to a PLC dispensing controller, the PLC dispensing controller controls the servo motor A to stop working, the conveyor belt stops conveying for 1-1.5 s, the PLC dispensing controller controls the cylinder B to work and extrude colloid, and the PLC dispensing controller continues to control the servo motor A to work until the next infrared transmitter is opposite to the infrared receiver;

s4, solidifying the colloid

The PCB subjected to dispensing is conveyed into the curing box, and the servo motor B controls the fan to rotate, so that the flow of gas in the curing box is accelerated, and the glue on the PCB is cured.

The invention has the beneficial effects that: the invention discloses a quick glue dispensing device and method for processing a PCB circuit board, which has the following advantages,

1. the traditional single-point glue arm glue dispensing is changed into the multiple glue dispensing arms for dispensing at the same time, so that the glue dispensing efficiency of the traditional piston pump glue dispensing is improved; meanwhile, the distance between the dispensing arm and the PCB is adjusted by pressure induction, so that a proper distance is kept between the dispensing arm and the PCB, and the probability of wire drawing/tailing in the dispensing process is greatly reduced;

2. the curing box is additionally arranged, the fan is arranged in the curing box, the PCB subjected to glue dispensing is continuously conveyed into the curing box, the fan in the curing box works and accelerates the air flow in the curing box, and the curing of the glue on the PCB is completed;

3. the invention discloses a conveying frame, which is characterized in that a discharging end of the conveying frame is connected with a removing plate in an inclined structure, a PCB is clamped on a PCB clamping plate, the PCB clamping plate is magnetically adsorbed on a conveying belt, when the PCB clamping plate magnetically adsorbed on the surface of the conveying belt is conveyed to the removing plate, the removing plate can remove the PCB clamping plate from the conveying belt, the PCB on the removed PCB clamping plate is taken out, the PCB needing glue dispensing is placed again, the PCB clamping plate carrying the PCB needing glue dispensing is adsorbed on the conveying belt again, the glue dispensing process can be carried out continuously, the PCB after glue dispensing is not required to be taken out temporarily, or a new PCB is arranged temporarily, and the working efficiency of a traditional glue dispenser is greatly improved.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

FIG. 2 is a schematic view of the connection structure of the diaphragm and the guide plate according to the present invention.

FIG. 3 is a schematic view of a connection structure of the dispensing arm, the guide plate and the dispensing arm fixing plate according to the present invention.

Fig. 4 is a schematic view of the internal structure of the dispensing arm of the present invention.

Fig. 5 is a schematic structural diagram of the pressure point contact rod of the present invention.

Fig. 6 is a schematic view of an internal structure of the dispensing platform of the present invention.

FIG. 7 is a schematic view of the internal structure of the curing box of the present invention.

Fig. 8 is a schematic structural view of the PCB card board of the present invention.

In the figure: 1. a glue dispensing machine frame, 2 a glue dispensing platform, 3 a diaphragm plate, 4 a guide plate, 5 a welding plate, 6 a glue dispensing arm fixing plate, 7 a glue dispensing arm, 7-1 a glue discharging cylinder, 7-2 a glue discharging head, 8 a cylinder fixing plate, 9 a cylinder A,10 a cylinder B,11 a cylinder protective cover, 12, a servo motor A,13 a conveying belt, 14, a PCB circuit board clamping plate, 15, a PCB circuit board, 16 a rejecting plate, 17, a PLC glue dispensing controller, 18, a starting switch, 19 a pause switch, 20, a reset switch, 21, a closing switch, 22, a curing box, 23 a servo motor B,24, a piston rod through groove, 25 a connecting rod through groove, 26, a guide plate pressing plate, 27, a connecting rod, 28 and a spring column A,29, a pressure point contact rod, 29-1, an inner rod, 29-2, an outer tube, 30, a limiting pin, 31, a dispensing arm connecting plate, 32, a T-shaped groove, 33, a T-shaped limiting block, 34, a dispensing pressing block, 35, a piston, 36, a limiting panel, 37, a connecting shaft, 38, a spring column B,40, a fan, 41, a pressure sensor, 42, an infrared receiver, 43, a rotating shaft, 44, a limiting strip, 45, a limiting groove, 46, a soft magnetic strip, 47, a magnet sheet, 48, a spring column groove, 49, a clamping plate groove, 50, a spring column C,51, a clamping panel, 52, a clamping plate strip, 53, an infrared transmitter, 54, 55, an extension rod, 56, an arc-shaped connecting block, 57, a threaded pin, 58 and a transmission frame.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner" and "outer" indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the connection may be direct or indirect through an intermediate medium, and the connection may be internal to the two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 and fig. 2, a quick glue dispensing device for processing a PCB comprises a left glue dispensing frame 1 and a right glue dispensing frame 2, wherein the glue dispensing frame 2 is located between the left glue dispensing frame 1 and the right glue dispensing frame 1, one glue dispensing frame 1 is connected with a PLC glue dispensing controller 17, the PLC glue dispensing controller 17 is connected with an initial switch 18, a pause switch 19, a reset switch 20 and a close switch 21, a transverse partition plate 3 and a cylinder fixing plate 8 are connected between the left glue dispensing frame 1 and the right glue dispensing frame 1, the cylinder fixing plate 8 is located above the transverse partition plate 3, the transverse partition plate 3 is connected with a guide plate 4 capable of sliding up and down, the guide plate 4 is connected with a glue dispensing arm fixing plate 6 through a welding plate 5, the glue dispensing arm fixing plate 6 is connected with a plurality of glue dispensing arms 7 on the left end face, the glue dispensing platform 2 is located under the glue dispensing arm 7, each glue dispensing arm 7 is connected with a welding plate, the other end of the welding plate is connected with a glue dispensing arm 31, the cylinder fixing plate 8 is connected with a cylinder 10 and a cylinder fixing plate 10, and a piston rod of a cylinder 9 is connected with a cylinder connecting plate 10, and a piston rod of a cylinder 17 are connected with a glue dispensing cylinder connecting plate and a cylinder connecting plate connected with a cylinder connecting plate 10, and a cylinder connecting plate 10.

The starting switch 18 on the PLC dispensing controller 17 is turned on, the PLC dispensing controller 17 controls the piston rod on the air cylinder A9 to move downwards and push the guide plate 4 downwards, the dispensing arm fixing plate 6 connected with the guide plate 4 moves downwards, when the dispensing arm 7 fixed on the dispensing arm fixing plate 6 moves downwards to a proper height, the PLC dispensing controller 17 controls the air cylinder A9 to stop moving, meanwhile, the piston rod on the air cylinder B10 is controlled to move downwards once every 3 seconds, the downward movement time is controlled within 0.2-0.5 s, and the air cylinder B10 moves downwards and simultaneously extrudes the colloid in the dispensing arm 7; a pause switch 19 on the PLC 17 is turned on, and the air cylinder B10 pauses to work; a recovery switch 20 on the PLC 17 is turned on, and the air cylinder A9 and the air cylinder B10 are both restored to the original positions; and turning on a closing switch 21 on the PLC dispensing controller 17 to stop the whole dispensing process.

As shown in fig. 2, the diaphragm plate 3 is of a hollow structure, a piston rod through groove 24 is formed in the upper surface of the diaphragm plate 3, two connecting rod through grooves 25 are formed in the end face of the right side of the diaphragm plate 3, two connecting rods 27 are connected to the end face of the left side of the guide plate 4, a guide plate pressing plate 26 is connected to the front end of each connecting rod 27, at least two spring columns a28 are connected to the bottom surface of the guide plate pressing plate 26, the spring columns a28 play a role in buffering, the guide plate pressing plate 26 is embedded in the diaphragm plate 3, the bottoms of the spring columns a28 are fixed to the bottom surface of the inner portion of the diaphragm plate 3, the connecting rods 27 penetrate through the connecting rod through grooves 25, and piston rods on the air cylinders A9 penetrate through the piston rod through grooves 24 and are connected to the guide plate pressing plate 26.

The piston rod on the cylinder A9 moves downwards and extrudes the guide plate pressing plate 26 downwards, the guide plate pressing plate 26 moves downwards and drives the whole guide plate 4 to move downwards, and the dispensing arm fixing plate 6 connected with the guide plate 4 also moves downwards along with the guide plate.

As shown in fig. 3 and 3, two "T" type grooves 32 are formed in the right side end face of the guide plate 4, two "T" type limit blocks 33 are connected to the left side wall of the dispensing arm connecting plate 31, the "T" type limit blocks 33 are embedded in the "T" type grooves 32, stability of the dispensing arm connecting plate 31 in the downward moving process can be improved, deviation can be prevented, the dispensing arm 7 is located between the guide plate 4 and the dispensing arm fixing plate 6, and a piston rod on the air cylinder B10 is connected with the dispensing arm connecting plate 31.

As shown in fig. 4, the dispensing arm 7 includes a glue discharging cylinder 7-1 and a glue discharging head 7-2, the glue discharging head 7-2 is connected to the bottom of the glue discharging cylinder 7-1, the glue discharging head 7-2 can select different models according to the actual required discharge amount and glue discharging pressure, a piston 35 is arranged in the glue discharging cylinder 7-1, the piston 35 is connected with a glue discharging press block 34 through a connecting shaft 37, the glue discharging press block 34 is connected with the glue dispensing arm connecting plate 31, a limiting panel 36 is fixed in the glue discharging cylinder 7-1, the limiting panel 36 is located between the piston 35 and the glue discharging press block 34, a spring column B38 is connected between the limiting panel 36 and the glue discharging press block 34, the spring column B38 plays a buffering role, the connecting shaft 37 penetrates through the limiting panel 36, and the limiting panel 36 can prevent the piston 35 from being removed from the glue discharging cylinder 7-1.

The piston rod on the cylinder B10 moves downwards and extrudes the glue dispensing arm connecting plate 31 downwards, the glue dispensing arm connecting plate 31 moves downwards and simultaneously drives the glue discharging pressing block 34 to move downwards, at the moment, the piston 35 moves downwards, and the glue in the glue discharging cylinder 7-1 is extruded out through the glue discharging head 7-2.

As shown in fig. 2 and 6, a pressure sensor 41 is disposed on the surface of the dispensing platform 2, the pressure sensor 41 is electrically connected to the PLC dispensing controller 17, the bottom of the guide plate 4 is connected to a pressure point contact rod 29, the pressure point contact rod 29 is located right above the pressure sensor 41, a piston rod on the air cylinder A9 drives the guide plate 4 to move down until the pressure point contact rod 29 touches the pressure sensor 41, the pressure sensor 41 transmits the signal to the PLC dispensing controller 17, and the PLC dispensing controller 17 controls the air cylinder A9 to stop moving.

As shown in fig. 5, the pressure point contact rod 29 comprises an inner rod 29-1 and an outer tube 29-2, the bottom of the inner rod 29-1 is connected with an inner rod extension rod 55, the inner rod 29-1 is embedded in the outer tube 29-2, the diameter of the inner rod 29-1 is the same as the inner diameter of the outer tube 29-2, the outer wall of the inner rod 29-1 and the inner wall of the outer tube 29-2 are both covered with rubber layers, friction force between the inner rod 29-1 and the outer tube 29-2 is enhanced, the diameter of the inner rod extension rod 55 is smaller than the inner diameter of the outer tube 29-2, the outer tube 29-2 in the inner rod extension rod 55 is connected with a threaded pin 57, an arc-shaped connecting block 56 is connected to the inner end face of the threaded pin 57 through a bolt, and the arc-shaped connecting block 56 is attached to the side wall of the inner rod extension rod 55.

When the length of the pressure point contact rod 29 is adjusted, the threaded pin 57 is unscrewed, and the rubber layers are covered on the outer wall of the inner rod 29-1 and the inner wall of the outer tube 29-2, so that the friction force between the inner rod 29-1 and the outer tube 29-2 is large, after the threaded pin 57 is unscrewed, the inner rod 29-1 needs to be pulled out or pushed inwards to the appropriate length of the pressure point contact rod 29 manually, then the threaded pin 57 is screwed, and the arc-shaped connecting block 56 is attached to the inner rod extension rod 55, so that the stability between the inner rod 29-1 and the outer tube 29-2 is improved.

As shown in fig. 1, 6 and 7, the dispensing platform 2 includes a conveying frame 58, a servo motor a12 is connected to the outer side wall of the conveying frame 58, the servo motor a12 is electrically connected to the PLC dispensing controller 17, two rotating shafts 43 are connected to the conveying frame 58, one of the rotating shafts 43 is connected to the servo motor a12, a conveying belt 13 is sleeved between the two rotating shafts 43, the conveying belt 13 is controlled by the servo motor a12 to convey, a PCB 15 is placed on the conveying belt 13, when the PCB 15 is conveyed to a position right below the dispensing arm 7, the PLC dispensing controller 17 controls the dispensing arm 7 to dispense glue, the conveying frame 58 is connected to a curing box 22, the curing box 22 is connected to a servo motor B23, the curing box 22 is connected to an internal fan 40, the servo motor B is connected to the fan 40, the PCB 15 after dispensing is continuously conveyed to the curing box 22, and the fan 40 in the curing box 22 works and accelerates the air flow in the curing box 22 to cure the glue on the PCB 15.

As shown in fig. 6, the surface of the rotating shaft 43 is connected with a plurality of limiting strips 44, the inner end surface of the conveyor belt 13 is provided with a plurality of limiting grooves 45, the limiting strips 44 are embedded in the limiting grooves 45, and the conveyor belt 13 and the rotating shaft 43 are in a meshing structure, so that the conveyor belt 13 can be effectively prevented from deviating in the conveying process.

As shown in fig. 6 and 8, a plurality of PCB circuit board clamping plates 14 are arranged on the surface of the conveyor belt 13, a plurality of soft magnetic strips 46 are embedded on the surface of the conveyor belt 13, the surface of each soft magnetic strip 46 is flush with the surface of the conveyor belt 13, the PCB circuit board 15 is clamped on the PCB circuit board clamping plates 14, a magnet piece 47 is connected to the bottom of each PCB circuit board clamping plate 14, the magnet piece 47 is magnetically adsorbed on the soft magnetic strips 46, an eliminating plate 16 in an inclined structure is connected to the discharge end of the conveying frame 58, the front end of the eliminating plate 16 abuts against the conveyor belt 13, when the PCB circuit board clamping plates 14 magnetically adsorbed on the surface of the conveyor belt 13 are conveyed to the eliminating plate 16, the eliminating plate 16 can eliminate the PCB circuit board clamping plates 14 from the conveyor belt 13, then take out the PCB circuit boards 15 on the eliminated PCB circuit board clamping plates 14, reposition the PCB circuit boards 15 needing glue dispensing, adsorb the PCB circuit boards 14 carrying the PCB circuit boards 15 needing glue dispensing on the conveyor belt 13 again, the process can be carried out continuously, the PCB circuit boards 15 after being taken out without suspending or suspend placing new PCB circuit boards 15, and the glue dispensing machine greatly improving the efficiency of the traditional glue dispensing machine.

As shown in fig. 6 and 8, the transmission frame 58 is connected with an infrared receiver 42, the infrared receiver 42 is electrically connected with the PLC dispensing controller 17, and the PCB card position-location board 14 is connected with an infrared emitter 53.

The infrared receiver 42 receives a signal transmitted by the infrared transmitter 53, the PCB circuit board clamping plate 14 is located under the dispensing arm 7 at the moment, the infrared receiver 42 transmits the signal to the PLC dispensing controller 17, the PLC dispensing controller 17 controls the servo motor A12 to pause for 1-1.5 s, and simultaneously controls the cylinder B10 to move downwards, the time required by the downward moving process of the cylinder B10 is controlled within 0.2-0.5 s, and the colloid in the dispensing arm 7 is extruded out.

The pause time of the servo motor A12 and the time required for the downward moving process of the air cylinder B10 can be adjusted according to actual conditions.

As shown in fig. 8, two pairs of spring post grooves 48, two clamp plate grooves 49 and a plurality of dispensing positioning points 54 are arranged on the upper surface of the PCB circuit board clamping plate 14, the two clamp plate grooves 49 are respectively connected between the two pairs of spring post grooves 48, the clamp plate grooves 49 are communicated with the spring post grooves 48, spring posts C50 are fixed in the spring post grooves 48, clamping panels 51 are connected to the spring posts C50, clamping plate strips 52 are connected between the two clamping panels 51, the clamping plate strips 52 are embedded in the clamp plate grooves 49, the PCB circuit board 15 is clamped between the two clamping plate strips 52, and the dispensing positions on the PCB circuit board 15 correspond to the dispensing positioning points 54.

Embodiment a debugging method of a quick glue dispensing device for processing a PCB

Firstly, a PCB 15 is clamped between two clamping strip plates 52 on a PCB clamping plate 14, glue dispensing positions on the PCB 15 correspond to glue dispensing positioning points 54 on the PCB clamping plate 14, then the PCB clamping plate 14 is fixed on a conveyor belt 13 in a magnetic adsorption manner, an initial switch 18 is turned on, a cylinder A9 controls a guide plate 4 to move downwards, a glue dispensing arm fixing plate 6 connected with the guide plate 4 moves downwards along with the guide plate, a glue dispensing arm 7 fixed on the glue dispensing arm fixing plate 6 moves downwards along with the guide plate, when a pressure point contact rod 29 on the guide plate 4 contacts a pressure sensor 41, the pressure sensor 41 transmits a signal to a PLC glue dispensing controller 17, the PLC glue dispensing controller 17 controls the cylinder A9 to stop moving, the cylinder B10 is controlled to work simultaneously, the cylinder B10 moves downwards and drives a glue dispensing press block 34 to move downwards, and the piston 35 extrudes glue in a glue dispensing cylinder 7-1 onto the PCB 15 through a glue dispensing head 7-2 while the glue dispensing press block 34 moves downwards; pressing the pause switch 19, observing the dispensing state on the PCB 15, and if the glue on the PCB 15 has dispensing wire drawing/tail stripping, indicating that the distance between the glue head 7-2 and the PCB 15 is too long and the length of the pressure point contact rod 29 needs to be shortened; unscrewing the threaded pin 57, manually pushing the inner rod 29-1 inwards, screwing the threaded pin 57, and debugging again until no wire drawing/tail stripping phenomenon exists in the colloid extruded on the PCB 15;

second embodiment PCB processing is with quick point glue theory of operation

After the length of the pressure point contact rod 29 is adjusted, the PCB 15 is clamped on the PCB clamping plate 14, the PCB clamping plate 14 is magnetically adsorbed on the conveyor belt 13, the starting switch 18 is turned on, the PLC 17 controls the cylinder A9 to work, the cylinder A9 pushes the dispensing arm 7 downwards to the adjusted height, the servo motor A12 drives the conveyor belt 13 to convey forwards, when the infrared transmitter 53 on the PCB clamping plate 14 is opposite to the infrared receiver 42, the infrared receiver 42 transmits a signal to the PLC 17, the PLC 17 controls the servo motor A12 to stop working, the conveyor belt 13 stops conveying for 1-1.5 s, the PLC 17 controls the cylinder B10 to work, the piston rod on the cylinder B10 moves downwards and extrudes the dispensing arm connecting plate 31 downwards, the dispensing arm connecting plate 31 moves downwards and drives the dispensing press block 34 to move downwards, at the moment, the piston 35 moves downwards, the colloid in the dispensing cylinder 7-1 is extruded by the dispensing head 7-2 to fall onto the PCB 15, the time of each time is controlled to be within 0.2 s, the dispensing arm connecting plate 31 moves downwards and drives the dispensing press block 34 to move downwards, the servo motor A12 to control the infrared transmitter to continue to control the infrared transmitter to move downwards and control the servo motor A13 to control the infrared transmitter to carry out the dispensing operation for 1.5s, and the infrared receiver after the infrared transmitter to control the infrared transmitter to carry out the dispensing controller A12; the dispensed PCB 15 is conveyed into the curing box 22, the servo motor B controls the fan 40 to rotate, the flow of gas in the curing box 22 is accelerated, and therefore the glue on the PCB 15 is cured.

In summary, the fast glue dispensing device and method for processing the PCB disclosed by the invention can greatly improve the glue dispensing efficiency of the traditional piston pump glue dispensing; meanwhile, the distance between the dispensing arm and the PCB is adjusted by pressure induction, so that a proper distance is kept between the dispensing arm and the PCB, and the probability of wire drawing/tailing in the dispensing process is greatly reduced; the adhesive also has the function of curing the adhesive on the PCB, and has wide popularization and application prospects.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments may be combined as appropriate by one of ordinary skill in the art to form other embodiments as will be apparent to those of skill in the art from the description herein.

Claims

1. The utility model provides a PCB circuit board processing is with quick adhesive deposite device, includes two left and right points and glues frame (1) and point gluey platform (2), point gluey platform (2) are located two left and right points and glue between frame (1), and one of them point gluey frame (1) is gone up and is connected with PLC point gluey controller (17), PLC point gluey controller (17) are gone up and are connected with starting switch (18), pause switch (19), reset switch (20) and close switch (21), its characterized in that: a transverse partition plate (3) and a cylinder fixing plate (8) are connected between the left dispensing machine frame (1) and the right dispensing machine frame (1), the cylinder fixing plate (8) is located above the transverse partition plate (3), the transverse partition plate (3) is connected with a guide plate (4) capable of sliding up and down, the guide plate (4) is connected with a dispensing arm fixing plate (6) through a welding plate (5), the left side end face of the dispensing arm fixing plate (6) is connected with a plurality of dispensing arms (7), the dispensing platform (2) is located under the dispensing arms (7), a dispensing arm connecting plate (31) is connected to the dispensing arms (7), a cylinder A (9) and a cylinder B (10) are connected to the cylinder fixing plate (8), the cylinder A (9) is connected with the guide plate (4), the cylinder B (10) is connected with the dispensing arm connecting plate (31), a cylinder protective cover (11) is connected to the cylinder fixing plate (8), and the cylinder A (9) and the cylinder B (10) are electrically connected with the dispensing controller (17);

platform (2) surface is glued to the point is equipped with pressure sensor (41), pressure sensor (41) with controller (17) electric connection is glued to the PLC point, deflector (4) bottom is connected with pressure point feeler lever (29), pressure point feeler lever (29) are located directly over pressure sensor (41), pressure point feeler lever (29) are including interior pole (29-1) and outer tube (29-2), interior pole (29-1) bottom is connected with interior pole extension rod (55), interior pole (29-1) are inlayed and are established in outer tube (29-2), the diameter of interior pole extension rod (55) is less than the internal diameter of outer tube (29-2), interior pole extension rod (55) interior outer tube (29-2) are connected with threaded pin (57), bolted connection has arc type connecting block (56) on the terminal surface in threaded pin (57), arc type connecting block (56) laminating is in interior pole extension rod (55) on the lateral wall.

2. The quick glue dispensing device for processing the PCB as claimed in claim 1, wherein: diaphragm (3) are hollow structure, diaphragm (3) upper surface is equipped with piston rod and leads to groove (24), it leads to groove (25) to be equipped with two connecting rods on diaphragm (3) right side terminal surface, be connected with two connecting rods (27) on deflector (4) left side terminal surface, connecting rod (27) front end is connected with deflector clamp plate (26), be connected with two at least spring post A (28) on deflector clamp plate (26) basal surface, deflector clamp plate (26) inlay and establish in diaphragm (3), spring post A (28) bottom is fixed the inside basal surface of diaphragm (3), connecting rod (27) run through connecting rod leads to groove (25), the piston rod on cylinder A (9) runs through piston rod leads to groove (24) and is connected on deflector clamp plate (26).

3. The quick glue dispensing device for processing the PCB as claimed in claim 1, wherein: be equipped with two "T" type recesses (32) on deflector (4) right side terminal surface, it is connected with two "T" type stopper (33) on arm connecting plate (31) left side wall to glue, "T" type stopper (33) inlay in "T" type recess (32), it is located to glue arm (7) to glue the arm deflector (4) with glue between the arm fixing plate (6), piston rod on cylinder B (10) with it links to each other to glue arm connecting plate (31).

4. The quick glue dispensing device for processing the PCB as claimed in claim 1 or claim 3, wherein: glue dispensing arm (7) including going out packing element (7-1) and going out gluey head (7-2), it connects to go out packing element (7-2) go out packing element (7-1) bottom, it is equipped with piston (35) in packing element (7-1), be connected with out gluey briquetting (34) through even axle (37) on piston (35), go out gluey briquetting (34) with glue dispensing arm connecting plate (31) links to each other, it has spacing panel (36) to go out packing element (7-1) internal fixation, spacing panel (36) are located piston (35) with go out between gluey briquetting (34), spacing panel (36) with go out and be connected with spring post B (38) between gluey briquetting (34), even axle (37) run through spacing panel (36).

5. The quick glue dispensing device for processing the PCB circuit board according to claim 1, wherein: platform (2) is glued including conveying frame (58) to the point, be connected with servo motor A (12) on conveying frame (58) lateral wall, servo motor A (12) with controller (17) electric connection is glued to the PLC point, conveying frame (58) in-connection has two pivot (43), one of them pivot (43) with servo motor A (12) link to each other, the cover is equipped with conveyer belt (13) between two pivot (43), PCB circuit board (15) have been placed on conveyer belt (13), be connected with curing box (22) on conveying frame (58), be connected with servo motor B (23) on curing box (22), curing box (22) internal connection has fan (40), servo motor B with fan (40) link to each other.

6. The quick glue dispensing device for processing the PCB as claimed in claim 5, wherein: the surface of the rotating shaft (43) is connected with a plurality of limiting strips (44), a plurality of limiting grooves (45) are formed in the inner end face of the conveyor belt (13), and the limiting strips (44) are embedded in the limiting grooves (45).

7. The quick glue dispensing device for processing the PCB as claimed in claim 5, wherein: conveyer belt (13) surface is equipped with a plurality of PCB circuit board screens board (14), conveyer belt (13) surface is connected with a plurality of soft magnetic stripe (46), PCB circuit board (15) card is established on PCB circuit board screens board (14), PCB circuit board screens board (14) bottom is connected with magnet piece (47), magnet piece (47) magnetic adsorption on soft magnetic stripe (46), be connected with infrared receiver (42) on conveying frame (58), infrared receiver (42) with controller (17) electric connection is glued to PLC point, be connected with infrared transmitter (53) on PCB circuit board screens board (14), be connected with rejection board (16) that are the slope structure on conveying frame (58) the discharge end, rejection board (16) front end with conveyer belt (13) offset.

8. The quick glue dispensing device for processing the PCB as claimed in claim 7, wherein: PCB circuit board screens board (14) upper surface is equipped with two pairs of spring post recesses (48), two cardboard recesses (49) and a plurality of some setpoint (54), and two cardboard recesses (49) are connected respectively between two pairs of spring post recesses (48), just cardboard recess (49) with spring post recess (48) are linked together, spring post recess (48) internal fixation has spring post C (50), be connected with screens panel (51) on spring post C (50), be connected with cardboard strip (52) between two screens panel (51), cardboard strip (52) inlay in cardboard recess (49).

9. The method for dispensing glue of the fast dispensing device for processing the PCB circuit board as claimed in any one of claims 1 to 8, wherein: comprises the following steps of (a) carrying out,

s1, debugging the downward moving distance of the dispensing arm (7)

Firstly, a PCB (15) is clamped on a PCB clamping plate (14), then the PCB clamping plates (14) with the same number as that of dispensing arms (7) are fixed on a conveyor belt (13) in a magnetic adsorption mode, a starting switch (18) is turned on, a cylinder A (9) controls the dispensing arms (7) to move downwards, when a pressure point contact rod (29) touches a pressure sensor (41), a PLC (programmable logic controller) controls the cylinder A (9) to stop moving, a cylinder B (10) is controlled to work at the same time, a piston (35) extrudes colloid in a colloid outlet cylinder (7-1) while a colloid outlet press block (34) is controlled to move downwards by the cylinder B (10), and the colloid is sprayed on the PCB (15) by a colloid outlet head (7-2); pressing a pause switch (19) to observe the dispensing state on the PCB (15), and if dispensing wire drawing/tail stripping occurs, indicating that the distance between the glue head (7-2) and the PCB (15) is too long and the length of a pressure point contact rod (29) needs to be shortened;

s2, adjusting the length of the pressure point contact rod (29)

Unscrewing the threaded pin (57), moving the outer pipe (29-2) up and down until the pressure point contact rod (29) is adjusted to a proper length, and then screwing the threaded pin (57);

s3, dispensing with a plurality of dispensing arms (7) simultaneously

After the downward moving distance of the dispensing arm (7) is adjusted, a PCB (15) is clamped on a PCB clamping plate (14), the PCB clamping plate (14) is magnetically adsorbed on a conveyor belt (13), a starting switch (18) is turned on, a cylinder A (9) controls the dispensing arm (7) to move downward to a set height, a servo motor A (12) drives the conveyor belt (13) to convey forward, when an infrared transmitter (53) on the PCB clamping plate (14) is opposite to an infrared receiver (42), the infrared receiver (42) transmits a signal to a PLC dispensing controller (17), the PLC dispensing controller (17) controls the servo motor A (12) to stop working, the conveyor belt (13) stops conveying for 1-1.5 s, the PLC controller (17) controls an air cylinder B (10) to work and extrude a colloid, the PLC dispensing controller (17) continues to control the servo motor A (12) to work until the next infrared transmitter (53) is opposite to the infrared receiver (42);

s4, solidifying the colloid

The PCB (15) subjected to dispensing is conveyed into the curing box (22), the servo motor B controls the fan (40) to rotate, the flow of air in the curing box (22) is accelerated, and therefore the colloid on the PCB (15) is cured.