CN110801988B

CN110801988B - Chip adhesive dispensing method based on PCB chip adhesive dispensing equipment

Info

Publication number: CN110801988B
Application number: CN201810882600.3A
Authority: CN
Inventors: 黄家旺
Original assignee: Zhangjiagang Ouwei Automation Research And Development Co ltd
Current assignee: Suzhou Qiwei Electronic Co ltd
Priority date: 2018-08-06
Filing date: 2018-08-06
Publication date: 2021-08-10
Anticipated expiration: 2038-08-06
Also published as: CN110801988A

Abstract

The invention discloses a chip adhesive dispensing method based on PCB chip adhesive dispensing equipment, which mainly solves the problems that in the prior art, the distance between PCB circuit board conveying lines is fixed and cannot be adjusted, only a PCB circuit board with a certain fixed size can be subjected to adhesive dispensing processing, and the application range is small. The PCB chip glue dispensing equipment based on the chip glue dispensing method comprises a first rack, an SMT chip characteristic mechanism, a second rack, an electric control cabinet, an operation panel and a PCB glue dispensing mechanism; PCB point gum machine constructs including adjustment transfer chain mechanism and some gum machine construct. The adjustable transfer chain mechanism of interval is designed into with the transfer chain, through synchronous machine drive ball screw's mode, can adjust the interval of transfer chain according to PCB circuit board size to can carry out the point to the processing of gluing to the PCB circuit board of equidimension not, application scope is wider.

Description

Chip adhesive dispensing method based on PCB chip adhesive dispensing equipment

Technical Field

The invention relates to the field of industrial automatic assembly, in particular to a chip mounting and dispensing method based on PCB chip mounting and dispensing equipment.

Background

Pcb (printed Circuit board), the name of which is printed wiring board, abbreviated as printed Circuit board, is one of the important parts in the electronics industry. Almost every kind of electronic equipment, as small as electronic watches, calculators, as large as computers, communication electronics, military weaponry systems, requires printed boards for electrical interconnection as long as there are electronic components such as integrated circuits. SMT is a process of mounting a leadless or short lead surface mount component on the surface of a Printed Circuit Board (PCB) and dispensing the component to complete the assembly process. The PCB paster dispensing equipment is automatic assembly equipment for dispensing SMT and PCB at four appointed positions.

Chinese patent document CN201621111458.5 discloses a dispensing and pasting combined apparatus, which comprises a frame, an X-axis linear module, a Y-axis linear module, an X-axis rail guide, a Y-axis rail guide, a support frame, a cross beam, a PCB conveying device, a dispensing and pasting combined device, wherein the support frame is installed on both sides of the frame, the Y-axis linear module and the Y-axis rail guide are respectively installed on the support frame, the cross beam Y-axis rail guide is connected with the Y-axis linear module, the X-axis linear module and the X-axis rail guide are respectively installed on the cross beam, the dispensing and pasting combined device is slidably installed on the X-axis rail guide and connected with the X-axis linear module, the PCB conveying device is installed on the frame, the PCB is conveyed to a fixed position by the PCB conveying device, the X-axis linear module and the Y-axis linear module jointly drive the dispensing and pasting combined device to reach a designated position of the PCB and the dispensing and pasting combined device carries out dispensing on the PCB by the dispensing and pasting combined device, And (3) pasting. According to the dispensing and pasting combined equipment disclosed above, the dispensing valve and the glue cylinder are arranged on the dispensing and pasting combined device, and the dispensing and pasting combined device is fixed on the base, so that the positions of the glue valve and the glue cylinder are correspondingly fixed and cannot freely move horizontally, namely the action positions of the glue valve and the glue cylinder are limited, so that only a PCB workpiece with a certain fixed size can be processed, and the application range is small.

At present, in order to meet the requirement of mass production of PCB chip adhesive dispensing automatic assembly industries to obtain the best economic benefit, a PCB chip adhesive dispensing device capable of processing PCB workpieces with different sizes is urgently needed to expand the application range thereof, so that manufacturers can obtain the best economic benefit. The present invention is directed to improvements in the problems of the prior art.

Disclosure of Invention

One purpose of the invention is to solve the problem that the PCB patch dispensing equipment in the prior art can only process a PCB workpiece with a certain fixed size and has a small application range. Compared with equipment of other mechanisms, the PCB chip glue dispensing equipment has the advantages that the PCB workpiece conveying line is designed into the conveying line adjusting mechanism capable of adjusting the distance, glue dispensing processing can be performed on PCB circuit boards of different sizes in a mode of driving the ball screw through the synchronous motor, and the application range is wider.

The second objective of the present invention is to provide a method for dispensing adhesive on a PCB based on the above-mentioned PCB adhesive dispensing device.

In order to solve one of the above technical problems, the technical scheme adopted by the invention is as follows:

a PCB paster dispensing device comprises a first rack 1, an SMT paster characteristic mechanism 2, a second rack 3, an electric control cabinet 4, an operation panel 5 and a PCB dispenser mechanism 6; the SMT paster characteristic mechanism 2 is divided into a PCB feeding conveying line mechanism 20 and an SMT paster mechanism 21; the PCB dispensing mechanism 6 includes an adjusting conveyor line mechanism 60 and a dispensing mechanism 61.

According to the invention, the technical means that the PCB conveying line is designed into the conveying line adjusting mechanism capable of adjusting the distance is adopted, and the ball screw is driven by the synchronous motor is adopted, so that the technical problem that the PCB patch dispensing equipment in the prior art can only process a PCB workpiece with a certain fixed size is solved, the distance of the conveying line can be adjusted according to the size of the PCB, the dispensing processing can be carried out on PCB boards with different sizes, and the technical effect of wider application range is achieved.

According to one embodiment of the invention, the framework structures of the first frame 1 and the second frame 3 are made of aluminum profiles, and the rest panels are formed by bending Q235 sheet metal parts; the electric control cabinet 4 is internally provided with electric elements; the operation panel 5 is provided with a start button and an emergency stop button. The aluminum profile is light in texture and does not rust; q235 has fine ductility, and bending property is good, and the size of assurance equipment that can be fine still has the advantage that the appearance is pleasing to the eye. The technical means of installing the electric elements inside the electric control cabinet 4 is adopted, and the electric control cabinet has the technical effect of facilitating maintenance and wiring.

By adopting the technical means of arranging the operation panel 5, an operator can input various data according to the display device and operate according to the prompt of the display device, so that the human-computer interaction performance is good; a start button and an emergency stop button are provided on the operation panel 5, and the start button is pressed when starting and the stop button is pressed when stopping. After the operator finishes inputting data, the operator presses a start button, and the machine operates; if some unpredictable problems are met in the operation process, an operator can press the emergency stop button in time, so that the loss caused by misoperation of machines or personnel is avoided, and the safety of equipment is improved.

According to an embodiment of the present invention, the PCB feeding conveyor line mechanism 20 includes two side plates 2001 and a two-step motor 2004; the side plates 2001 are arranged on the left side and the right side of the PCB feeding conveying line mechanism 20, the stepping motors 2004 and the driving rotating wheels 2005 are symmetrically installed on the side plates 2001, and transmission on the two sides is independent. By adopting the technical means that the transmissions on the two sides of the PCB feeding and conveying line mechanism 20 are mutually independent, if the transmission on one side is in error or unexpected, the transmission can be ensured not to be affected or less influenced to a certain extent in a certain time.

According to an embodiment of the present invention, a small roller one 2006 and a small roller three 2011 are arranged at two ends of the side plate 2001; a small rotating wheel II 2009 is arranged in the middle of the side plate 2001, and two sides of the driving rotating wheel 2005 are respectively provided with a tensioning roller 2008; the small rotating wheel I2006, the driving rotating wheel 2005, the tensioning roller 2008 and the small rotating wheel III 2011 are mutually driven through a flat belt I2010; and a side plate 2001 at the left side of the PCB feeding conveying line mechanism 20 is provided with three photoelectric sensors 2003.

According to an embodiment of the present invention, the SMT pick and place mechanism 21 is divided into two parts, namely, a left part and a right part; the left part comprises a first push plate 2107 and a first upright post 2112, and the first upright post 2112 is vertically arranged on the first push plate 2107; a first synchronous motor 2101 is arranged on the lower side of the first push plate 2107, a cylinder mounting plate 2102 is arranged at the upper end of the first synchronous motor 2101, and the shaft end of the first synchronous motor 2101 is connected with a first ball screw 2104 through a first coupling 2103; the first push plate 2107 is vertically provided with two guide shafts 2105, and the guide shafts 2105 are positioned on two sides of the first ball screw 2104; an SMT patch placing plate 2108 is arranged on the upper side of the first push plate 2107; the right part comprises a guide rod cylinder 2117 and a cylinder 2118, and the PCB 2002 is placed above the guide rod cylinder 2117; and a second push plate 2119 is fixedly arranged above the air cylinder 2118.

In the technical scheme, a technical means that a first synchronous motor 2101 and a first ball screw 2104 are connected by a coupler is adopted, and in high-speed and heavy-load power transmission, the coupler has the effects of buffering, vibration reduction and improvement of dynamic performance of a shaft system; the first ball screw 2104 is adopted, the first synchronous motor 2101 is started, the first ball screw 2104 is driven to rotate through the connection of the first coupling 2103, the first ball screw 2104 converts the rotating motion into linear motion, the linear motion is upwards moved along the guide shafts 2105 on two sides, and the SMT paster placing plate 2108 is pushed to upwards move to a specified stroke position to stop.

According to an embodiment of the invention, an X-direction sliding rail block I2114 is mounted on the inner side of the first upright post I2112 through a transverse plate 2113, a moving plate I2115 is arranged on the X-direction sliding rail block I2114, a Z-direction cylinder I2116 is fixedly mounted on the outer side of the moving plate I2115, and a suction nozzle mounting plate 2111 is fixedly mounted at the lower end of the Z-direction cylinder I2116 through a bolt; 4 suction nozzles 2110 are symmetrically arranged on the suction nozzle mounting plate 2111; the second push plate 2119 is provided with a pressure plate 2120, the pressure plate 2120 is located right above the PCB 2002, and the pressure plate 2120 is fixedly connected with 4 pressing blocks 2121 through bolts. 4 suction nozzles 2110 are installed, so that the SMT paster 2109 can be adsorbed more stably, and the processing accuracy is guaranteed. Meanwhile, the pressing plate 2120 is fixedly connected with the 4 pressing blocks 2121 through bolts, so that the SMT paster and the PCB are pressed more tightly.

According to an embodiment of the present invention, the adjusting conveyor line mechanism 60 is supported by a front support 6004 and a rear support 6007, and a left side plate 6001 and a right side plate 6002 are respectively arranged on two sides of the front support 6004 and the rear support 6007; a driving roller 6003 is arranged at the left end of the inner side of the left side plate 6001 and the right side plate 6002, a driven roller 6008 is arranged at the right end, and a tensioning wheel 6005 is arranged in the middle; a driving roller 6003 arranged on the right side plate 6002 is correspondingly and fixedly connected with a synchronous motor III 6017; two synchronous motors II 6009 are symmetrically arranged on the outer side of the right side plate 6002, the synchronous motors II 6009 are connected with a ball screw II 6015 through a coupling II 6010, a nut pair 6011 is installed at one end, close to the synchronous motors II 6009, of the ball screw II 6015, and an adjusting plate 6012 is installed on the nut pair 6011; and a fixing plate 6016 is fixedly mounted at the other end of the second ball screw 6015.

In the technical scheme, a technical means that a coupler is connected with a second synchronous motor 6009 and a second ball screw 6015 is adopted, and in high-speed and heavy-load power transmission, the coupler has the effects of buffering, damping and improving the dynamic performance of a shaft system; here adopts two 6009 drive ball screw two 6015 of synchronous machine to the mode of action together of cooperation adjusting plate 6012 converts rotary motion into linear motion, and adjusting plate 6012 removes corresponding stroke thereupon, can adjust the interval of transfer chain according to PCB circuit board 2002's size, thereby designs into the adjustment transfer chain mechanism of adjustable interval with PCB circuit board transfer chain, has reached and has carried out some glue processing to the PCB circuit board of equidimension not, and application scope is wider technological effect.

According to an embodiment of the present invention, the dispensing mechanism 61 is formed by jointly supporting a second vertical column 6104 and a support 6108, a second moving plate 6105 is arranged above the second vertical column 6104, a second X-direction sliding rail 6109 is arranged above the support 6108, and a third moving plate 6110 is arranged above the second X-direction sliding rail 6109; an X-direction servo sliding table 6102 is arranged above the dispensing mechanism 61, a Y-direction servo sliding table is mounted on the X-direction servo sliding table 6102, the left end of the X-direction servo sliding table 6102 is a Y-direction servo sliding table initial position 6101, and the right end is a Y-direction servo sliding table limit position 6101; a moving plate fourth 6115 is installed on the Y-direction servo sliding table, a Z-direction air cylinder second 6114 is installed on the moving plate fourth 6115, a pushing block 6113 is installed at the lower end of the Z-direction air cylinder second 6114, a rubber nozzle 6111 is installed on the pushing block 6113, and the rubber nozzle 6111 is controlled through a proportional valve 6112.

According to an embodiment of the invention, the PCB chip glue dispensing equipment adopts PLC control, and control panel buttons are manually operated.

To solve the second technical problem, the technical solution adopted by the present invention is as follows:

a chip adhesive dispensing method based on PCB chip adhesive dispensing equipment comprises the following steps:

step one, the action of a feeding conveying line:

1) the inspection equipment has no hidden trouble, and a start button of the control panel 3 is manually operated; the PCB 2002 is placed on the flat belts I2010 on the two sides through the front-end equipment manipulator, and meanwhile, the stepping motor 2004 is started, so that the driving rotating wheel 2005 is driven to rotate, and the driving rotating wheel 2005 drives the small rotating wheels I2006, the tensioning roller 2008 and the small rotating wheels III 2011 to transmit together through the flat belts I2010; the small rotating wheels 2006 on the two sides transmit simultaneously to convey the PCB 2002 to a designated position;

2) after the PCB 2002 is conveyed to a designated position, the correlation type photoelectric sensor 2003 senses that the PCB 2002 reaches the designated position, so that signals are transmitted to the 2 stepping motors 2004, the stepping motors 2004 stop immediately after receiving the signals, the driving rotating wheel 2005 stops rotating, the small rotating wheels 2006 on the two sides stop transmitting at the same time, and the flat belt I2010 stops transmitting;

second step, the SMT patch mechanism 21 acts:

1) the first synchronous motor 2101 is started, the first ball screw 2104 is driven to rotate through the connection of the first coupling 2103, the first ball screw 2104 converts the rotating motion into linear motion, the linear motion is moved upwards along the guide shafts 2105 on the two sides, and the SMT chip placement board 2108 is pushed to move upwards to a specified stroke position to stop;

2) at this time, the Z-direction cylinder I2116 moves downwards to the designated stroke position, so that the nozzle mounting plate 2111 is pushed to move downwards to the designated position, 4 nozzles 2110 are symmetrically mounted on the nozzle mounting plate 2111, at this time, the 4 nozzles 2110 suck the SMT paster 2109, and then the Z-direction cylinder I2116 moves upwards to the designated stroke position;

3) then, the motor of the first X-direction sliding rail block 2114 is started, the first moving plate 2115 moves to a specified stroke position along with the movement of the first X-direction sliding rail block 2114, and meanwhile, the SMT patch 2109 moves the same stroke along with the movement of the first X-direction sliding rail block 2114 to reach a position right above the PCB 2002;

4) after the SMT paster 2109 reaches the position right above the PCB 2002, the Z-direction cylinder I2116 descends to the designated stroke position again, and then the suction nozzle 2110 loosens the SMT paster 2109 and places the SMT paster in the square groove of the PCB 2002;

5) the air cylinder 2118 firstly moves upwards for a certain stroke and then moves downwards to a specified stroke position, so that the SMT paster 2109 is pressed in the square groove of the PCB 2002 by the 4 pressing blocks 2121 arranged on the pressing plate 2120; after the actions are finished, the air cylinder 2118 moves upwards to return to the designated height, and the slide block of the first X-direction slide rail slide block 2114 also returns to the initial position;

thirdly, adjusting the conveying line mechanism 60 to act:

1) when the PCB 2002 pasted with the SMT paster 2109 on the transmission line of the SMT paster characteristic mechanism 2 is transmitted to the left end of the adjusting transmission line mechanism 60 along with the small rotating wheels I2006 on the two sides, the synchronous motor II 6009 drives the ball screw II 6015 to rotate, the ball screw II 6015 converts the rotary motion into linear motion, the adjusting plate 6012 moves corresponding strokes along with the linear motion, and the distance between the transmission lines can be adjusted according to the size of the PCB 2002;

2) when the second synchronous motor 6009 is started, the third synchronous motor 6017 is started similarly, so that the driving roller 6003 is driven to rotate, the driving roller 6003 and the driven roller 6008 drive the second flat belt 6006 to transmit, the PCB 2002 with the SMT paster 2109 reaches a specified position along with the transmission of the second flat belt 6006, and at the moment, the third synchronous motor 6017 stops operating;

step four, the glue dispensing mechanism 61 acts:

1) after the PCB 2002 with the SMT patch 2109 attached thereto reaches the designated position along with the transmission of the second flat belt 6006, the second Z-direction cylinder 6114 descends to the designated stroke position at the initial position 6101 of the Y-direction servo sliding table, so as to push the push block 6113 to the designated position, and the first position of the PCB 2002 and the SMT patch 2109 is subjected to dispensing through the glue nozzle 6111;

2) then, a motor installed at the initial position 6101 of the Y-direction servo sliding table is started to drive the moving plate four 6115 to move to the designated stroke position along the Y direction, and the second positions of the PCB 2002 and the SMT patches 2109 are dispensed by the glue nozzle 6111;

3) then, the motor of the X-direction servo sliding table 6102 is started, the Y-direction servo sliding table installed above the X-direction servo sliding table 6102 reaches the Y-direction servo sliding table limit position 6103, and then the glue nozzle 6111 performs glue dispensing on the third position of the PCB 2002 and the SMT chip 2109;

4) repeating the step 2) in the fourth step, and dispensing the fourth positions of the PCB 2002 and the SMT paster 2109;

5) after all the dispensing actions at the four positions of the PCB 2002 and the SMT patch 2109 are completed, each mechanism is reset, and the PCB 2002 is output along with the two flat belts 6006 at the two sides.

Has the advantages that:

according to the technical scheme of the invention, the synchronous motor is adopted to drive the ball screw, the PCB conveying line is designed into the conveying line adjusting mechanism capable of adjusting the distance, the technical problem that the PCB patch dispensing equipment in the prior art can only process a PCB workpiece with a certain fixed size is solved, the distance of the conveying line can be adjusted according to the size of the PCB, the dispensing processing can be carried out on the PCB with different sizes, and the technical effect of wider application range is achieved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a front view of an assembly of a PCB chip dispensing device of the present invention.

Fig. 2 is a top view of an assembly of a PCB die attach adhesive dispensing apparatus of the present invention.

Fig. 3 is a left side view of the final assembly of the PCB chip dispensing device of the present invention.

Fig. 4 is a front view of an SMT pad characteristic mechanism of a PCB pad dispensing device of the present invention.

Fig. 5 is a top view of an SMT pad characteristic mechanism of a PCB pad dispensing device according to the present invention.

FIG. 6 is a left side view of the SMT paster feature mechanism of the PCB paster dispensing device of the present invention.

Fig. 7 is a front view of a PCB feeding conveyor line mechanism of a PCB chip dispensing device of the present invention.

Fig. 8 is a top view of a PCB feeding conveyor line mechanism of a PCB chip dispensing device of the present invention.

Fig. 9 is a left top view of a PCB feeding conveyor line mechanism of a PCB chip dispensing device of the present invention.

Fig. 10 is a sectional view taken along the line a of fig. 8.

FIG. 11 is a front view of an SMT chip placement mechanism of a PCB chip placement and dispensing device of the present invention.

Fig. 12 is a top view of an SMT pick and place mechanism of a PCB pick and place apparatus according to the present invention.

FIG. 13 is a left side view of the SMT chip placement mechanism of the PCB chip placement machine of the present invention.

Fig. 14 is a cross-sectional view taken along line C of fig. 11.

Fig. 15 is a sectional view taken along line B of fig. 11.

Fig. 16 is a partial view taken from direction D of fig. 15.

Fig. 17 is a front view of a PCB dispensing mechanism of a PCB chip dispensing device of the present invention.

Fig. 18 is a top view of a PCB dispensing mechanism of a PCB die attach dispensing apparatus of the present invention.

FIG. 19 is a left side view of a PCB dispensing mechanism of a PCB chip dispensing device of the present invention.

Fig. 20 is a front view of an adjusting conveyor line mechanism of a PCB chip dispensing device of the present invention.

Fig. 21 is a top view of an adjusting conveyor line mechanism of a PCB chip dispensing device of the present invention.

Fig. 22 is a left side view of the adjusting conveyor line mechanism of the PCB chip dispensing device of the present invention.

Fig. 23 is a sectional view taken along direction F of fig. 21.

Fig. 24 is a cross-sectional view taken along line E of fig. 21.

Fig. 25 is a front view of a dispensing mechanism of a PCB die bonder apparatus according to the present invention.

Fig. 26 is a top view of a dispensing mechanism of a PCB die bonder apparatus according to the present invention.

Fig. 27 is a left side view of a dispensing mechanism of a PCB die bonder apparatus according to the present invention.

Fig. 28 is a partial sectional view taken along line F of fig. 27.

Fig. 29 is a schematic view of the structure of the SMT patch.

Fig. 30 is a top view of a PCB circuit board.

Fig. 31 is a front view of the PCB circuit board.

Fig. 32 is a top view of the finished product after SMT and PCB tape dispensing is completed.

Fig. 33 is a front view of the finished product after SMT and PCB tape dispensing is completed.

In the attached drawings

1. Frame 2, SMT paster characteristic mechanism 20, PCB material loading transfer chain mechanism

2001. Side plate 2002, PCB circuit board 2003, photoelectric sensor

2004. Stepping motor 2005, driving wheel 2006 and small wheel one

2007. Supporting plate 2008, tensioning roller 2009 and small rotating wheel II

2010. Flat belt one 2011 and small rotating wheel three

21. SMT paster mechanism 2101, synchronous machine 2102, cylinder mounting panel

2103. Coupling I2104, ball screw I2105 and guide shaft

2106. Linear bearing 2107, push plate I2108 and SMT paster placing plate

2109. SMT paster 2110, suction nozzle 2111 and suction nozzle mounting plate

2112. Upright post I2113, transverse plate 2114 and X-direction slide rail I

2115. Moving plate I2116, Z-direction cylinder I2117 and guide rod cylinder

2118. Air cylinder 2119, push plate II 2120 and pressure plate

2121. Compact block 2122, riser

3. Frame two 4, electric control cabinet 5, operating panel

6. PCB (printed circuit board) glue dispensing mechanism

60. Adjusting conveying line 6001, left side plate 6002 and right side plate

6003. Driving roller 6004, front support 6005 and tension wheel

6006. Flat belt II 6007, rear support 6008 and driven roller

6009. Synchronous motor II 6010, coupling II 6011 and nut pair

6012. Adjusting plate 6013, slide block 6014, linear guide rail

6015. Ball screw II 6016, fixing plate 6017 and synchronous motor III

61. Glue dispensing mechanism 6101, Y-direction servo slide initial position 6102, X-direction servo slide

6103. Y-direction servo sliding table limit position 6104, two upright columns 6105, and two moving plates

6106. Drag chain 6107, drag chain bracket 6108, support

6109. X-direction slide rail sliding block II 6110, moving plate III 6111 and rubber nozzle

6112. Proportional valve 6113, push block 6114 and Z-direction cylinder II

6115. Moving plate four

7. Workpiece after dispensing

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the following embodiments of the present invention are described in further detail with reference to the accompanying drawings. It should be noted that the descriptions of "above", "below", "bottom end", "front", "back", etc. mentioned in the present embodiment are defined in a general sense, for example, defined by referring to the direction of gravity, the direction of gravity is below, the opposite direction is above, similarly above is the top or top end, below is the bottom or bottom end, and the description is only for clarity, and is not intended to limit the scope of the invention. It should be understood that the specific embodiments described herein are merely illustrative of the embodiments of the invention and are not limiting of the embodiments of the invention.

The first embodiment is as follows:

as shown in fig. 1, 4 and 17, a PCB chip adhesive dispensing device comprises a first rack 1, an SMT chip characteristic mechanism 2, a second rack 3, an electric control cabinet 4, an operation panel 5 and a PCB adhesive dispensing mechanism 6; the SMT paster characteristic mechanism 2 is divided into a PCB feeding conveying line mechanism 20 and an SMT paster mechanism 21; the PCB glue dispensing mechanism 6 comprises a conveying line adjusting mechanism 60 and a glue dispensing mechanism 61; the equipment is controlled by a PLC and is manually operated to control a panel button. The PCB conveying line is designed into the distance-adjustable conveying line adjusting mechanism, the technical problem that the PCB workpiece of a certain fixed size can only be processed by the PCB surface-mounted adhesive dispensing equipment in the prior art is solved in a mode that the ball screw is driven by the synchronous motor, the distance of the conveying line can be adjusted according to the size of the PCB, the point adhesive dispensing processing of the PCB of different sizes is achieved, and the technical effect that the application range is wider is achieved.

The framework structures of the first rack 1 and the second rack 3 are made of aluminum profiles, and the aluminum profiles are light in texture and do not rust; the other panels are formed by bending Q235 sheet metal parts, Q235 has good ductility and good bending performance, the size of equipment can be well ensured, and the panel has the advantage of attractive appearance; and electric elements are arranged in the electric control cabinet 4. The technical scheme that the electric elements are arranged inside the electric control cabinet 4 is adopted, and the technical effects of convenient maintenance and wiring are achieved.

The operation panel 5 is provided with a start button and an emergency stop button, so that an operator can input various data according to the display device and operate according to the prompt of the display device, and the human-computer interaction performance is good; a start button and an emergency stop button are provided on the operation panel 5, and the start button is pressed when starting and the stop button is pressed when stopping. After the operator finishes inputting data, the operator presses a start button, and the machine operates; if some unpredictable problems are met in the operation process, an operator can press the emergency stop button in time, so that the loss caused by misoperation of machines or personnel is avoided, and the safety of equipment is improved.

As shown in fig. 4, 8, 10, the PCB feeding conveyor line mechanism 20 includes two side plates 2001 and a two-step motor 2004; the side plates 2001 are arranged on the left side and the right side of the PCB feeding conveying line mechanism 20, the stepping motors 2004 and the driving rotating wheels 2005 are symmetrically installed on the side plates 2001, and transmission on the two sides is independent. The transmissions on the two sides are independent, and if the transmission on one side is in error or unexpected, the transmission can be guaranteed not to be affected or less affected within a certain time to a certain extent.

Two ends of the side plate 2001 are provided with a small rotating wheel I2006 and a small rotating wheel III 2011; a small rotating wheel II 2009 is arranged in the middle of the side plate 2001, and two sides of the driving rotating wheel 2005 are respectively provided with a tensioning roller 2008; the small rotating wheel I2006, the driving rotating wheel 2005, the tensioning roller 2008 and the small rotating wheel III 2011 are mutually driven through a flat belt I2010; the PCB feeding and conveying line mechanism 20 comprises three photoelectric sensors 2003 and a side plate 2001 on the left side, wherein the photoelectric sensors 2003 are correlation type photoelectric sensors. The photoelectric sensor can convert the measured change into the change of an optical signal, and then further convert the optical signal into an electric signal by virtue of the photoelectric element, and the photoelectric sensor has the advantages of long detection distance, short response time and high resolution, can detect a tiny object and detect the position with high precision, thereby improving the position detection precision of the equipment on the PCB and improving the processing precision of the equipment to a certain extent.

The PCB 2002 is placed on the flat belts I2010 on the two sides through the front-end equipment manipulator, and meanwhile, the stepping motor 2004 is started, so that the driving rotating wheel 2005 is driven to rotate, and the driving rotating wheel 2005 drives the small rotating wheels I2006, the tensioning roller 2008 and the small rotating wheels III 2011 to transmit together through the flat belts I2010; the small rotating wheels 2006 on the two sides transmit simultaneously to convey the PCB 2002 to a designated position; the correlation type photoelectric sensor 2003 senses that the PCB 2002 reaches a specified position, so that signals are transmitted to the 2 stepping motors 2004, the stepping motors 2004 stop immediately after receiving the signals, the driving rotating wheel 2005 stops rotating, and the first flat belt 2010 stops transmission.

As shown in fig. 4, 14 and 15, the SMT pick and place mechanism 21 is divided into two parts, i.e., a left part and a right part; the left part comprises a first push plate 2107 and a first upright post 2112, and the first upright post 2112 is vertically arranged on the first push plate 2107; a first synchronous motor 2101 is arranged on the lower side of the first push plate 2107, a cylinder mounting plate 2102 is arranged at the upper end of the first synchronous motor 2101, and the shaft end of the first synchronous motor 2101 is connected with a first ball screw 2104 through a first coupling 2103; in the high-speed heavy-load power transmission, the coupler has the functions of buffering and damping and improving the dynamic performance of a shaft system; the first push plate 2107 is vertically provided with two guide shafts 2105, and the guide shafts 2105 are positioned on two sides of the first ball screw 2104; an SMT patch placing plate 2108 is arranged on the upper side of the first push plate 2107; the right part comprises a guide rod cylinder 2117 and a cylinder 2118, and the PCB 2002 is placed above the guide rod cylinder 2117; and a second push plate 2119 is fixedly arranged above the air cylinder 2118. When the synchronous motor I2101 is started, the ball screw I2104 is driven to rotate through the connection of the coupling I2103, the ball screw I2104 converts the rotating motion into linear motion, the linear motion moves upwards along the guide shafts 2105 on the two sides, and the SMT chip placement board 2108 is pushed to move upwards to a specified stroke position to stop.

As shown in fig. 14 and 16, an X-direction sliding rail block I2114 is mounted on the inner side of the upright post I2112 through a transverse plate 2113, a moving plate I2115 is arranged on the X-direction sliding rail block I2114, a Z-direction cylinder I2116 is fixedly mounted on the outer side of the moving plate I2115, and a suction nozzle mounting plate 2111 is fixedly mounted at the lower end of the Z-direction cylinder I2116 through a bolt; 4 suction nozzles 2110 are symmetrically arranged on the suction nozzle mounting plate 2111; the 4 suction nozzles 2110 suck the SMT patches 2109. The second push plate 2119 is provided with a pressure plate 2120, the pressure plate 2120 is positioned right above the PCB 2002, the pressure plate 2120 is fixedly connected with 4 pressing blocks 2121 through bolts, and the SMT paster 2109 is pressed in a square groove of the PCB 2002; the compact block 2121 is made of polyurethane, so that the surface damage to the workpiece can be reduced, and the product percent of pass is improved.

As shown in fig. 17, 20-21, and 23-24, the adjusting conveyor line mechanism 60 is supported by a front support 6004 and a rear support 6007, and a left side plate 6001 and a right side plate 6002 are respectively arranged on two sides of the front support 6004 and the rear support 6007; a driving roller 6003 is arranged at the left end of the inner side of the left side plate 6001 and the right side plate 6002, a driven roller 6008 is arranged at the right end, and a tensioning wheel 6005 is arranged in the middle; a driving roller 6003 arranged on the right side plate 6002 is correspondingly and fixedly connected with a synchronous motor III 6017; two synchronous motors II 6009 are symmetrically arranged on the outer side of the right side plate 6002, the synchronous motors II 6009 are connected with a ball screw II 6015 through a coupler II 6010, and in high-speed heavy-load power transmission, the coupler has the effects of buffering, vibration reduction and shafting dynamic performance improvement; a nut pair 6011 is installed at one end of the second ball screw 6015 close to the second synchronous motor 6009, and an adjusting plate 6012 is installed on the nut pair 6011; and a fixing plate 6016 is fixedly mounted at the other end of the second ball screw 6015. The second synchronous motor 6009 drives the second ball screw 6015, the second synchronous motor 6009 is matched with the adjusting plate 6012 to move together, the rotating motion is converted into linear motion, the adjusting plate 6012 moves corresponding strokes accordingly, the distance between the conveying lines can be adjusted according to the size of the PCB 2002, the PCB conveying lines are designed into the adjusting conveying line mechanism capable of adjusting the distance, dispensing processing can be performed on the PCB of different sizes, and the application range is wider.

As shown in fig. 17 and fig. 26 to 28, the dispensing mechanism 61 is formed by jointly supporting a second column 6104 and a support 6108, a second moving plate 6105 is arranged above the second column 6104, a second X-direction sliding rail 6109 is arranged above the support 6108, and a third moving plate 6110 is arranged above the second X-direction sliding rail 6109; an X-direction servo sliding table 6102 is arranged above the dispensing mechanism 61, a Y-direction servo sliding table is mounted on the X-direction servo sliding table 6102, the left end of the X-direction servo sliding table 6102 is a Y-direction servo sliding table initial position 6101, and the right end is a Y-direction servo sliding table limit position 6101;

a moving plate fourth 6115 is installed on the Y-direction servo sliding table, a Z-direction air cylinder second 6114 is installed on the moving plate fourth 6115, a push block 6113 is installed at the lower end of the Z-direction air cylinder second 6114, a glue nozzle 6111 is installed on the push block 6113, the glue nozzle 6111 is controlled through a proportional valve 6112, the Z-direction air cylinder second 6114 descends to a specified stroke position at an initial position 6101 of the Y-direction servo sliding table, so that the push block 6113 is pushed to a specified position, and glue dispensing is performed on the first position of the PCB 2002 and the SMT paster 2109 through the glue nozzle 6111; the metering valve 6112 is opened or closed by an electromagnetic valve. The electromagnetic valve has the advantages of simple system, convenience in connection with a computer, low price, express action, small power and light appearance, the electromagnetic valve controls the on-off of the proportional valve, the response time is short, the action is rapid, the precision of the dispensing action is improved, the space is saved, and the electromagnetic valve is light and attractive.

step one, the action of a feeding conveying line:

2) after the PCB 2002 is conveyed to a designated position, the correlation type photoelectric sensor 2003 senses that the PCB 2002 reaches the designated position, so that signals are transmitted to the 2 stepping motors 2004, the stepping motors 2004 stop immediately after receiving the signals, the driving rotating wheel 2005 stops rotating, and the small rotating wheels 2006 on the two sides stop transmitting at the same time;

second step, the SMT patch mechanism 21 acts:

4) the Z-direction cylinder I2116 descends to the designated stroke position again, and then the suction nozzle 2110 loosens the SMT paster 2109 and places the SMT paster in the square groove of the PCB 2002;

thirdly, adjusting the conveying line mechanism 60 to act:

step four, the glue dispensing mechanism 61 acts:

Although the illustrative embodiments of the present invention have been described above to enable those skilled in the art to understand the present invention, the present invention is not limited to the scope of the embodiments, and it is apparent to those skilled in the art that all the inventive concepts using the present invention are protected as long as they can be changed within the spirit and scope of the present invention as defined and defined by the appended claims.

Claims

1. A chip adhesive dispensing method based on PCB chip adhesive dispensing equipment,

the PCB patch dispensing equipment comprises a first rack (1), an SMT patch characteristic mechanism (2), a second rack (3), an electric control cabinet (4), an operation panel (5) and a PCB dispensing mechanism (6);

the SMT chip characteristic mechanism (2) is divided into a PCB feeding conveying line mechanism (20) and an SMT chip mechanism (21);

the PCB glue dispensing mechanism (6) comprises a conveying line adjusting mechanism (60) and a glue dispensing mechanism (61);

the PCB feeding conveyor line mechanism (20) comprises two side plates (2001) and a two-step motor (2004);

the side plates (2001) are arranged on the left side and the right side of the PCB feeding conveying line mechanism (20), the side plates (2001) are symmetrically provided with stepping motors (2004) and driving rotating wheels (2005), and the transmission on the two sides is mutually independent;

the adjusting conveying line mechanism (60) is formed by supporting a front support (6004) and a rear support (6007), and a left side plate (6001) and a right side plate (6002) are respectively arranged on two sides of the front support (6004) and the rear support (6007); a driving roller (6003) is arranged at the left end of the inner side of the left side plate (6001) and the right side plate (6002), a driven roller (6008) is arranged at the right end, and a tensioning wheel (6005) is arranged in the middle;

a driving roller (6003) arranged on the right side plate (6002) is correspondingly and fixedly connected with a third synchronous motor (6017); two synchronous motors II (6009) are symmetrically arranged on the outer side of the right side plate (6002), the synchronous motors II (6009) are connected with a ball screw II (6015) through a coupling II (6010), a nut pair (6011) is installed at one end, close to the synchronous motors II (6009), of the ball screw II (6015), and an adjusting plate (6012) is installed on the nut pair (6011); a fixing plate (6016) is fixedly mounted at the other end of the second ball screw (6015);

the method for dispensing the patch is characterized by comprising the following steps:

firstly, a PCB feeding conveying line mechanism (20) acts:

1) the equipment is inspected to have no hidden danger, and a start button of the operation panel (5) is manually operated; the PCB (2002) is placed on the flat belt I (2010) on the two sides through a front-end equipment manipulator, and meanwhile, the stepping motor (2004) is started, so that the driving rotating wheel (2005) is driven to rotate, and the driving rotating wheel (2005) drives the small rotating wheel I (2006), the tensioning roller (2008) and the small rotating wheel III (2011) to transmit together through the flat belt I (2010); the small rotating wheels I (2006) on the two sides transmit simultaneously to convey the PCB (2002) to a designated position;

2) after the PCB (2002) is conveyed to a designated position, the photoelectric sensor (2003) senses that the PCB (2002) reaches the designated position, so that signals are transmitted to 2 stepping motors (2004), the stepping motors (2004) stop simultaneously after receiving the signals, the driving rotating wheel (2005) stops rotating, and the small rotating wheels one (2006) on the two sides stop transmitting simultaneously;

secondly, the SMT patch mechanism (21) acts:

1) the synchronous motor I (2101) is started, the ball screw I (2104) is driven to rotate through connection of the coupling I (2103), the ball screw I (2104) converts rotary motion into linear motion, the linear motion moves upwards along the guide shafts (2105) on two sides, and the SMT patch placing plate (2108) is pushed to move upwards to a specified stroke position to stop;

2) at the moment, the Z-direction air cylinder I (2116) moves downwards to a specified stroke position, so that the suction nozzle mounting plate (2111) is pushed to move downwards to the specified position, 4 suction nozzles (2110) are symmetrically mounted on the suction nozzle mounting plate (2111), at the moment, the 4 suction nozzles (2110) suck SMT patches (2109), and then the Z-direction air cylinder I (2116) moves upwards to the specified stroke position;

3) then, a motor of the first X-direction sliding rail block (2114) is started, the first moving plate (2115) moves to a specified stroke position along with the movement of the first X-direction sliding rail block (2114), and meanwhile, the SMT paster (2109) moves with the same stroke to reach a position right above the PCB (2002);

4) after the SMT paster (2109) reaches the position right above the PCB (2002), the Z-direction air cylinder I (2116) descends to the designated stroke position again, and then the suction nozzle (2110) loosens the SMT paster (2109) and places the SMT paster in a square groove of the PCB (2002);

5) the air cylinder (2118) firstly moves upwards for a certain stroke and then moves downwards to a specified stroke position, so that 4 pressing blocks (2121) arranged on the pressing plate (2120) press the SMT paster (2109) in a square groove of the PCB (2002); after the actions are finished, the air cylinder (2118) moves upwards to return to the designated height, and the sliding block of the X-direction sliding rail sliding block I (2114) also returns to the initial position;

thirdly, adjusting the conveying line mechanism (60) to act:

1) when a PCB (2002) pasted with an SMT paster (2109) on a conveying line of the SMT paster characteristic mechanism (2) is conveyed to the left end of the conveying line adjusting mechanism (60) along with the small rotating wheels (2006) on the two sides, the synchronous motor II (6009) drives the ball screw II (6015) to rotate, the ball screw II (6015) converts the rotary motion into linear motion, the adjusting plate (6012) moves corresponding strokes along with the linear motion, and the distance between the conveying lines can be adjusted according to the size of the PCB (2002);

2) when the second synchronous motor (6009) is started, the third synchronous motor (6017) is started similarly, so that the driving roller (6003) is driven to rotate, the driving roller (6003) and the driven roller (6008) drive the second flat belt (6006) to transmit, the PCB (2002) attached with the SMT paster (2109) reaches a specified position along with the transmission of the second flat belt (6006), and at the moment, the third synchronous motor (6017) stops operating;

fourthly, the glue dispensing mechanism (61) acts:

1) after the PCB (2002) pasted with the SMT paster (2109) reaches a designated position along with the transmission of the flat belt II (6006), at an initial position (6101) of the Y-direction servo sliding table, the Z-direction air cylinder II (6114) descends to a designated stroke position, so that the push block (6113) is pushed to the designated position, and the first positions of the PCB (2002) and the SMT paster (2109) are subjected to glue dispensing through the glue nozzle (6111);

2) then, a motor arranged at the initial position (6101) of the Y-direction servo sliding table is started to drive a moving plate four (6115) to move to a specified stroke position along the Y direction, and glue is dispensed at a second position of the PCB (2002) and the SMT paster (2109) through a glue nozzle (6111);

3) then, a motor of the X-direction servo sliding table (6102) is started, a Y-direction servo sliding table arranged above the X-direction servo sliding table (6102) reaches a Y-direction servo sliding table limit position (6103), and then a glue nozzle (6111) carries out glue dispensing on a third position of the PCB (2002) and the SMT paster (2109);

4) repeating the step 2) in the fourth step, and dispensing the fourth positions of the PCB (2002) and the SMT patch (2109);

5) after all the dispensing actions of the four positions of the PCB (2002) and the SMT patch (2109) are finished, each mechanism is reset, and the PCB (2002) is output along with the flat belts II (6006) on the two sides.