Anti-displacement chip mounting device for SMT chip mounter

Abstract

The invention provides an anti-displacement chip mounting device for an SMT chip mounter, and the device comprises a pedestal which is used for installing a chip mounting instrument; the positioning assembly is arranged at the top of the base and used for clamping a PCB, the positioning assembly comprises two sleeves, and the two sleeves are slidably connected to the left side and the right side of the base respectively; the sliding sleeve is connected into the sleeve in a sliding mode, a first sealing piece is arranged on the outer wall of the sliding sleeve, and a first airtight space is formed between the sliding sleeve and the sleeve. The invention belongs to the technical field of SMT chip mounters. Through the positioning assembly, the PCB can be clamped under the action of air pressure, and then the air pressure is injected into the airtight space II to push the extension pipe to retract to drive the chuck to tension the PCB, so that the tightening effect of the PCB is realized, the surface flatness of the PCB is ensured, and the chip mounting precision is improved; and meanwhile, a stretching clamping and positioning mode can also prevent the ground from being interfered by patch elements to influence the flatness during double-sided patch of the PCB, so that the surface mounting effect of the PCB is further ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of SMT placement machines, and in particular relates to an anti-displacement placement device for an SMT placement machine. Background Art

[0002] SMT placement machine is a device used to accurately place surface mount components (SMD) onto printed circuit boards (PCBs). It plays a vital role in the electronics assembly industry and is mainly used to achieve efficient and high-precision component placement. With the advancement of technology, the performance and functions of placement machines are also constantly improving to meet the needs of increasingly complex electronic products.

[0003] In the prior art, since the PCB has two sides, capacitors, filters and other components are mounted on both sides of the PCB substrate when mounting. This allows the PCB to be laid flat when mounting one side, but then when mounting the other side, it cannot be placed normally because components are mounted on the bottom side, which affects the mounting of the other side of the PCB, thereby reducing the mounting accuracy of the components. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to provide an anti-displacement patch device for an SMT patch machine, which can improve the positioning accuracy of the PCB so that the positioning will not be affected by the interference of components when the double-sided patch is placed on the PCB.

[0005] In order to solve the above problems, the present invention provides an anti-displacement patch device for an SMT patch machine, comprising: A base for mounting the patch device; A positioning assembly is arranged on the top of the base and is used to clamp the PCB. The positioning assembly includes two sleeves, which are respectively slidably connected to the left and right sides of the base; A sliding sleeve is slidably connected in the sleeve, and a sealing member 1 is provided on the outer wall of the sliding sleeve so that an airtight space 1 is formed between the sliding sleeve and the sleeve; The extension tube is slidably connected in the sliding sleeve through the telescopic sleeve, so that the airtight space 1 is connected to the outside through the telescopic sleeve and the extension tube, a turnover unit is arranged between the extension tube and the sliding sleeve, a sealing member 2 is connected to one end of the extension tube close to the telescopic sleeve, so that the airtight space 2 is formed between the sealing member 2 and the turnover unit, and a pressure relief valve 1 for exhausting air into the airtight space 2 is installed on the outer wall of the extension tube; A chuck is connected to the end of the extension tube, a receiving groove is provided on the side of the chuck away from the extension tube, a slide groove is provided on the top and bottom of the chuck, and the opposite sides of the two slide grooves are connected to the extension tube through the pressure chamber, a piston is slidably connected in the slide groove, and the bottom of the piston extends into the receiving groove and is fixedly connected to a pressure plate; A driving member is installed at the bottom of the base and is used to supply air to the airtight space.

[0006] Further, the driving member includes an air box, which is fixedly connected to the bottom of the base; There are two air pumps, both of which are connected to the air box and are used for pumping and injecting air respectively; Two air supply pipes are provided, so that the air box supplies air to the two airtight spaces through the two air supply pipes.

[0007] Furthermore, the flip unit includes a baffle plate, which is sleeved on the extension tube, and a circular groove is provided at the opening position of the sliding sleeve to fit with the outer wall of the baffle plate, so that the baffle plate and the second sealing member cooperate to form the second airtight space; A one-way bearing is sleeved on the extension tube, the one-way bearing is fixedly connected to the baffle, the inner ring of the one-way bearing is connected with a ball, and the outer wall of the extension tube is spirally provided with a track groove for the ball to move; A sleeve, which is fixedly connected to a side of the baffle plate close to the second seal, and the inner wall of the sleeve is in contact with the outer wall of the extension tube; The elastic member is arranged at the opening position of the sliding sleeve and is used for supporting the baffle.

[0008] Furthermore, the elastic member includes a threaded cover, which is threadedly connected to the opening position of the sliding sleeve, so that the distance between the threaded cover and the baffle is equal to half of the track groove pitch; A primary spring is arranged between the threaded cover and the baffle plate and is used for resisting the baffle plate.

[0009] Furthermore, the top of the inner wall of the circular groove protrudes along the length direction of the circular groove to form a limiting portion, and the outer wall of the baffle is provided with a limiting groove for accommodating the limiting portion. A through hole is opened upward through one side of the limiting portion close to the second seal, and the top of the through hole is fixedly connected to the second pressure relief valve.

[0010] Furthermore, a secondary spring is fixedly connected to a side of the second sealing member close to the telescopic sleeve, and a pressure relief hole is provided on a side of an outer wall of the sliding sleeve close to the first sealing member.

[0011] Furthermore, a hydraulic press is fixedly connected to the top of the sleeve, an output shaft of the hydraulic press extends into the sleeve and is fixedly connected to a positioning block, and a friction surface that fits the sliding sleeve is processed on the bottom of the positioning block.

[0012] Furthermore, a mounting groove is provided at the bottom of the piston, a three-stage spring for supporting the piston is arranged in the mounting groove, and a pressure sensor for opening and closing the hydraulic press is fixedly connected to the bottom of the three-stage spring.

[0013] Further, one end of the sliding sleeve away from the sleeve is fixedly connected with a motor, the output shaft of the motor is fixedly connected with a gear, a tooth groove meshing with the gear is formed on the side wall of the chuck, and a horizontal sensor for opening and closing the motor is fixedly connected to the side wall of the chuck.

[0014] Further, the telescopic sleeve includes an outer tube fixedly connected to the air inlet position of the sliding sleeve; an inner tube slidably disposed within the outer tube, the outer wall of the inner tube contacting the inner wall of the outer tube through a seal three, and one end of the inner tube extending out of the outer tube is fixedly connected to the air inlet position of the extension tube.

[0015] In summary, the present invention has at least the following beneficial effects: 1. For the anti-displacement chip mounting device for an SMT mounter, through the provided positioning assembly, the PCB can be clamped first under the action of air pressure, and then the extension tube is retracted by injecting air pressure into the airtight space two to drive the chuck to tighten the PCB, thereby realizing the tensioning effect of the PCB, ensuring the flatness of the PCB surface, improving the chip mounting accuracy. At the same time, the stretching clamping and positioning method can also prevent the ground from being interfered by the chip-mounted components during double-sided chip mounting of the PCB, thus further ensuring the chip mounting effect on the PCB surface; 2. For the anti-displacement chip mounting device for an SMT mounter, through the provided flipping unit, energy can be stored when the PCB is clamped and fixed, and then released until one side of the PCB is completely chip-mounted. The reset of the baffle causes the ball to squeeze the wall of the track groove to drive the extension tube to rotate, thereby realizing the automatic flipping of the PCB, which can further improve the double-sided chip mounting efficiency of the PCB. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 FIG. is a schematic structural diagram of an anti-displacement chip mounting device for an SMT mounter according to the present invention.

[0018] Figure 2 FIG. is a three-dimensional structural schematic diagram of a front perspective cross-sectional view of an anti-displacement chip mounting device for an SMT mounter according to the present invention.

[0019] Figure 3 FIG. is a three-dimensional structural schematic diagram of a right perspective cross-sectional view of an anti-displacement chip mounting device for an SMT mounter according to the present invention.

[0020] Figure 4It is a schematic structural diagram of a positioning component in an anti-displacement chip mounting device for an SMT mounter according to the present invention.

[0021] Figure 5 It is a three-dimensional structural diagram of the right side view of a sliding sleeve in an anti-displacement chip mounting device for an SMT mounter according to the present invention.

[0022] Figure 6 It is a three-dimensional structural diagram of the left side view of a chuck in an anti-displacement chip mounting device for an SMT mounter according to the present invention.

[0023] Figure 7 It is a schematic internal structure diagram of a chuck in an anti-displacement chip mounting device for an SMT mounter according to the present invention.

[0024] Figure 8 It is a schematic diagram of the state when the positioning component in an anti-displacement chip mounting device for an SMT mounter contacts the PCB board.

[0025] Figure 9 It is Figure 8 A sectional view of the positioning component in the state.

[0026] Figure 10 It is a schematic diagram of the state when the positioning component in an anti-displacement chip mounting device for an SMT mounter clamps the PCB board.

[0027] Figure 11 It is Figure 10 A sectional view of the positioning component in the state.

[0028] Figure 12 It is a schematic diagram of the state when the positioning component in an anti-displacement chip mounting device for an SMT mounter stretches the PCB board.

[0029] Figure 13 It is Figure 12 A sectional view of the positioning component when stretching the PCB board in the state.

[0030] Figure 14 It is Figure 12 A sectional view of the positioning component after stretching the PCB board in the state.

[0031] The reference numerals are shown as: 1. Base; 2. SMT unit; 201. Robotic arm; 202. SMT suction cup; 3. Positioning component; 301. Sleeve; 302. Sliding sleeve; 303. Extension tube; 304. Chuck; 305. Driving part; 3051. Air tank; 3052. Air pump; 3053. Air supply pipe; 4. Seal one; 5. Airtight space one; 6. Telescopic sleeve; 601. Outer tube; 602. Inner tube; 7. Flipping unit; 701. Baffle; 702. One-way bearing; 703. Sleeve; 704. Elastic part; 7041. Threaded cover; 7042. First-stage spring; 8. Seal two; 9. Airtight space two; 10. Pressure relief valve one; 11. Accommodating groove; 12. Chute; 13. Pressure chamber; 14. Piston; 15. Pressing plate; 16. Circular groove; 17. Ball; 18. Track groove; 19. Limiting part; 20. Limiting groove; 21. Through hole; 22. Pressure relief valve two; 23. Second-stage spring; 24. Pressure relief hole; 25. Hydraulic press; 26. Positioning block; 27. Friction surface; 28. Mounting groove; 29. Third-stage spring; 30. Pressure sensor; 31. Motor; 32. Gear; 33. Tooth groove; 34. Horizontal sensor; 35. Seal three. Detailed implementation mode

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0033] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0034] In the present invention, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0036] See also Figures 1-14 As shown, according to Embodiment 1 of the present invention, there is provided an anti-displacement patch device for an SMT patch machine, comprising: a base 1 for mounting a patch device; A positioning assembly 3, which is arranged on the top of the base 1 and is used to clamp the PCB. The positioning assembly 3 includes two sleeves 301, which are respectively slidably connected to the left and right sides of the base 1; The sliding sleeve 302 is slidably connected in the sleeve 301, and a sealing member 4 is provided on the outer wall of the sliding sleeve 302 so that an airtight space 5 is formed between the sliding sleeve 302 and the sleeve 301; The extension tube 303 is slidably connected in the sliding sleeve 302 through the telescopic sleeve 6, so that the airtight space 15 is connected to the outside through the telescopic sleeve 6 and the extension tube 303. A turnover unit 7 is arranged between the extension tube 303 and the sliding sleeve 302. A sealing member 28 is connected to the end of the extension tube 303 close to the telescopic sleeve 6, so that an airtight space 29 is formed between the sealing member 28 and the turnover unit 7. The outer wall of the extension tube 303 is installed with a pressure relief valve 10 for exhausting air to the airtight space 29; A chuck 304 is connected to the end of the extension tube 303. A receiving groove 11 is provided on the side of the chuck 304 away from the extension tube 303. A slide groove 12 is provided on the top and bottom of the chuck 304. The opposite sides of the two slide grooves 12 are connected to the extension tube 303 through a pressure chamber 13. A piston 14 is slidably connected in the slide groove 12. The bottom of the piston 14 extends into the receiving groove 11 and is fixedly connected to a pressure plate 15. The driving member 305 is installed at the bottom of the base 1 and is used to supply air to the airtight space 5.

[0037] In this embodiment, observe Figure 1 It can be found that by providing a base 1, a patch unit 2 mainly composed of a mechanical arm 201 and a patch suction cup 202 is installed on the top of the base 1, and a PLC programmable controller for controlling the patch unit 2 is provided on the front side of the base 1. When the PCB is patched, the mechanical arm 201 can be operated by starting the PLC programmable controller, and then the patch suction cup 202 at the end of the mechanical arm 201 can suck the patch component and place it on the PCB surface to realize the patch operation and realize the component mounting of the PCB.

[0038] However, since the PCB has two sides (front and back), when mounting components on the PCB substrate, capacitors, filters and other components are mounted on both sides. When mounting components on one side of the PCB, it can be placed flat. However, when turning to mount components on the other side, due to the components mounted on the bottom surface, it cannot be placed normally, which affects the mounting of the other side of the PCB and thus reduces the mounting accuracy of the components.

[0039] Therefore, in Figure 1 it can also be found that a positioning component 3 is additionally provided on the top of the base 1 for clamping the PCB. Subsequently, in combination with Figure 4 it can be seen that the positioning component 3 includes two sleeves 301. The two sleeves 301 are arranged on the left and right sides of the base 1 with their openings facing each other. A sliding sleeve 302 is slidably connected in the sleeve 301. An extension tube 303 is connected in the sliding sleeve 302. The end of the extension tube 303 extending out of the sliding sleeve 302 is connected with a chuck 304.

[0040] Then looking at Figure 8 it can be found that a seal 4 is provided on the outer wall of the sliding sleeve 302, forming an airtight space 5 between the sliding sleeve 302 and the sleeve 301. Then, in combination with Figure 9 it can be seen that the extension tube 303 is slidably connected in the sliding sleeve 302 through a telescopic sleeve 6. A receiving groove 11 is provided on the side of the chuck 304 facing away from the extension tube 303. Chute 12 is provided at the top and bottom of the chuck 304. Both sides of the two chutes 12 facing away from each other are communicated with the extension tube 303 through a pressure chamber 13. A piston 14 is slidably connected in the chute 12. The bottom of the piston 14 extends into the receiving groove 11 and is fixedly connected with a pressing plate 15. In order to prevent the top piston 14 from sliding freely under the action of gravity, causing the pressing plate 15 to move down and affecting the insertion of the edge of the PCB into the receiving groove 11, in Figure 7 it can be seen that an installation groove 28 is provided at the bottom of the piston 14, and a three-stage spring 29 for supporting the piston 14 is arranged in the installation groove 28.

[0041] Finally, in Figure 2 it can be seen that a driving member 305 for supplying air to the airtight space 5 is also provided at the bottom of the base 1. When it is necessary to clamp the PCB, only need to inject air into the sleeve 301 through the driving member 305. The air will first enter the airtight space 5, then enter the telescopic sleeve 6 and the extension tube 303 in sequence through the airtight space 5, and finally flow into the pressure chamber 13. At this time, the piston 14 is supported by the three-stage spring 29 and cannot be pushed out of the chute 12 by the air. Therefore, the increase in air pressure at this time will push the sliding sleeve 302 to slide, making the airtight space 5 change from the Figure 4 state to Figure 8The state increases, so as to realize pushing the sliding sleeve 302 out of the sleeve 301 by air pressure, and making the sliding sleeve 302 drive the chuck 304 to approach the PCB through the extension tube 303.

[0042] As both sides of the PCB are in contact with the chuck 304, while the PCB is pressed and bent, the PCB will also exert a resistance on the chuck 304, increasing the forward pressure of the chuck 304. At this time, if the airtight space one 5 wants to expand, it will be resisted by the PCB. Therefore, in order to avoid excessive bending of the PCB and ensure the clamping effect of the PCB, the supporting force exerted by the three-stage spring 29 on the piston 14 should be slightly greater than the sum of the gravity of the piston 14, the gravity of the pressure plate 15, and the gas pressure required to slide the sliding sleeve 302, so as to ensure that the piston 14 will not be pushed out by the air pressure during the initial air injection, and at the same time, the sliding stability of the sliding sleeve 302 can be ensured. When the chuck 304 is in contact with the PCB as Figure 8 shown in the state, the sum of the gravity of the piston 14, the gravity of the pressure plate 15, the gas pressure required to slide the sliding sleeve 302, and the resistance of the chuck 304 being resisted will be greater than the supporting force exerted by the three-stage spring 29 on the piston 14. At this time, the continuous injection of air will push the piston 14 out of the chute 12, so that the pressure plate 15 is as Figure 10 shown in the state to approach and clamp the PCB, realizing the positioning and fixing operation of the PCB.

[0043] However, this squeezing clamping method will cause the PCB to bend as Figure 10 shown in the state, and the bent PCB will make the surface-mounted components unable to be stably placed on the PCB, affecting the surface-mounting accuracy.

[0044] Therefore, looking at Figure 8 it can be found that a flipping unit 7 is provided between the extension tube 303 and the sliding sleeve 302. Subsequently, combining Figure 9 it can be seen that one end of the extension tube 303 close to the telescopic sleeve 6 is connected with a second seal 8, forming an airtight space two 9 between the second seal 8 and the flipping unit 7. A pressure relief valve one 10 for exhausting air to the airtight space two 9 is installed on the outer wall of the extension tube 303. At the same time, in order to ensure the use stability of the sliding sleeve 302, a second-stage spring 23 is fixedly connected to the side of the second seal 8 close to the telescopic sleeve 6, which is used to provide support for the extension tube 303 to prevent the extension tube 303 from being pressed into the sliding sleeve 302 after the chuck 304 contacts the PCB. A pressure relief hole 24 is provided on the outer wall of the sliding sleeve 302 on the side close to the first seal 4, which can be used for pressure relief when the extension tube 303 slides, avoiding the influence of air pressure on the sliding of the extension tube 303.

[0045] At this time, after the pressing plate 15 clamps the PCB, the continuous addition of air will increase the air pressure in the airtight space I 5. When the air pressure exceeds the threshold value of the pressure relief valve I 10, the air will be released through the pressure relief valve I 10, allowing the air to enter the airtight space II 9, thus preventing the PCB from being further bent.

[0046] As the air enters the airtight space II 9, the air pressure in the airtight space II 9 will gradually increase, causing the state of the sliding sleeve 302 and the extension tube 303 to be as Figure 11 move to Figure 13 shown in the state diagram. Using the air to push the seal II 8 away from the flipping unit 7, the retraction movement of the chuck 304 is realized. At this time, the PCB will be stretched as Figure 12 shown in the state diagram to ensure that the PCB remains taut after being fixed, keeping the surface of the PCB in a horizontal state, which can effectively improve the PCB soldering operation.

[0047] Since the flipping unit 7 is provided, after the upper surface of the PCB is soldered, it can be flipped over by the flipping unit 7, turning the lower surface of the PCB to the upper side, thus realizing the double-sided efficient soldering of the PCB. At the same time, the suspended and clamped PCB can also prevent the bottom from being interfered by the soldered components during PCB soldering, effectively ensuring the accuracy of PCB soldering.

[0048] Finally, to further improve the efficiency of PCB soldering, observing Figure 1 and Figure 2 it can be found that guide grooves are provided on both the left and right sides of the top of the base 1. Screws are rotatably connected in the guide grooves. Two sleeves 301 are respectively slidably arranged at the two guide grooves, and the bottom of the sleeve 301 is threadedly connected to the screw through a slider. At this time, only by driving the screw to rotate through the motor can the movement of the sleeve 301 be realized, making the PCB soldering more flexible.

[0049] In a further preferred embodiment of the present invention, since the PCB needs to be removed after soldering, and most air pumps 3052 can only pump air unidirectionally, the driving member 305 is as Figure 3 shown. The driving member 305 includes an air tank 3051, which is fixedly connected to the bottom of the base 1. Two air pumps 3052 are connected to the bottom of the air tank 3051, so that the two air pumps 3052 are respectively used for pumping and injecting air, enabling the air tank 3051 to pump and inject air into the two airtight spaces I 5 through the air supply pipe 3053.

[0050] Meanwhile, in order to ensure the stability of the repeated operation of the positioning component 3, the first pressure relief valve 10 should adopt a valve that can relieve pressure in both directions. At this time, when the air pump 3052 pumps air, a negative pressure will be generated in the first airtight space 5, thereby increasing the pressure difference between the first airtight space 5 and the second airtight space 9. At this time, the first pressure relief valve 10 will open to allow the air in the second airtight space 9 to flow back into the first airtight space 5, realizing the reset of the extension tube 303.

[0051] In a further preferred embodiment of the present invention, in order to better turn over the PCB after surface mounting, as Figure 9 shown, the flipping unit 7 includes a baffle 701 sleeved on the extension tube 303. A circular groove 16 that fits the outer wall of the baffle 701 is provided at the opening position of the sliding sleeve 302, so that the baffle 701 and the second seal 8 cooperate to form the second airtight space 9. A limiting portion 19 is formed by the inner wall top of the circular groove 16 protruding along the length direction of the circular groove 16. A limiting groove 20 for accommodating the limiting portion 19 is provided on the outer wall of the baffle 701. A through hole 21 is formed by penetrating upward on the side of the limiting portion 19 close to the second seal 8, and a second pressure relief valve 22 is fixedly connected to the top of the through hole 21; a one-way bearing 702 sleeved on the extension tube 303, the one-way bearing 702 is fixedly connected to the baffle 701, and the inner ring of the one-way bearing 702 is connected with a ball 17. A track groove 18 for the movement of the ball 17 is spirally provided on the outer wall of the extension tube 303; an elastic member 704 is arranged at the opening position of the sliding sleeve 302 for supporting the baffle 701; meanwhile, in order to ensure the airtight effect of the second airtight space 9, a sleeve 703 is also provided, which is fixedly connected to the side of the baffle 701 close to the second seal 8, and the inner wall of the sleeve 703 fits the outer wall of the extension tube 303.

[0052] At this time, when the second airtight space 9 is inflated and the extension tube 303 is retracted into the sliding sleeve 302, the chuck 304 tightens the PCB. When the PCB is straightened, the PCB will resist the movement of the chuck 304, so that the extension tube 303 cannot continue to retract into the sliding sleeve 302. At this time, the increased air pressure in the second airtight space 9 will push the baffle 701 as Figures 13-14 shown to move away from the second seal 8 for allowing the second airtight space 9 to continue to increase. Until the baffle 701 cannot move further after contacting the elastic member 704, when the air pressure in the second airtight space 9 continues to increase until it breaks through the threshold of the second pressure relief valve 22, the air will be discharged through the second pressure relief valve 22, which can prevent the positioning component 3 from being damaged.

[0053] When the baffle 701 is away from the second seal 8, the one-way bearing 702 can rotate normally, so that the ball 17 moves normally in the track groove 18. Subsequently, when the PCB needs to be flipped, only need to control the second pressure relief valve 22 to open actively in a manual or PLC programmable controller electric control manner to release the air in the second airtight space 9. At this time, the air pressure in the second airtight space 9 decreases, and the elastic member 704 will preferentially push the baffle 701 to reset. At this time, the baffle 701 is close to the second seal 8, and the one-way bearing 702 is locked. Therefore, the reset of the baffle 701 will cause the ball 17 to squeeze the inner wall of the track groove 18, thereby driving the extension tube 303 to rotate and realizing the flipping operation of the PCB.

[0054] In a further preferred embodiment of the present invention, as Figure 9 shown, by making the elastic member 704 include a threaded cover 7041, which is threadedly connected to the opening position of the sliding sleeve 302, and making the distance between the threaded cover 7041 and the baffle 701 equal to half of the pitch of the track groove 18, when the baffle 701 is reset, the ball 17 can stably move a distance of half a pitch in the track groove 18 to ensure that the PCB is exactly flipped 180 degrees and the turning over of the PCB is more stable.

[0055] And by arranging a first-stage spring 7042 for abutting against the baffle 701 between the threaded cover 7041 and the baffle 701, and the elastic force of the first-stage spring 7042 needs to be greater than the elastic force of the second-stage spring 23, so that after the second airtight space 9 is filled with air, the air first pushes the extension tube 303 to retract into the sliding sleeve 302, and then pushes the baffle 701 away from the second seal 8 to ensure the use stability of the flipping unit 7.

[0056] In a further preferred embodiment of the present invention, after the air pressure in the first airtight space 5 increases, in addition to increasing the pressure on the first pressure relief valve 10, it will also increase the thrust on the sliding sleeve 302, so that the sliding sleeve 302 will be pushed out of the sleeve 301. At this time, the retraction of the extension tube 303 will lose the effect of straightening the PCB.

[0057] Therefore, observing Figure 8 it can be found that a hydraulic press 25 is fixedly connected to the top of the sleeve 301. The output shaft of the hydraulic press 25 extends into the sleeve 301 and is fixedly connected with a positioning block 26. The bottom of the positioning block 26 is processed with a friction surface 27 that fits the sliding sleeve 302. Subsequently, observing Figure 7 it can be seen that the bottom of the third-stage spring 29 is fixedly connected with a pressure sensor 30 for opening and closing the hydraulic press 25.

[0058] At this time, when the chuck 304 contacts the PCB and the piston 14 moves downward, the pressure received by the pressure sensor 30 will increase, thereby sending a signal to the PLC programmable controller to activate the hydraulic press 25, so as to use the positioning block 26 to contact the sliding sleeve 302 to prevent the subsequent movement of the sliding sleeve 302 from affecting the straightening effect of the PCB.

[0059] Among them, the above-mentioned pressure sensor 30 is a commercially available product and does not involve its improvement, so the specific structure thereof will not be elaborated too much.

[0060] In a further preferred embodiment of the present invention, as Figure 6 shown, when the extension tube 303 resets, it is in the state of the seal member II 8 moving close to the baffle 701. At this time, the one-way bearing 702 is locked and cannot rotate, resulting in the rotation of the chuck 304 when the extension tube 303 resets, and the rotation angle cannot be fixed. Therefore, a motor 31 is fixedly connected to the end of the sliding sleeve 302 away from the sleeve 301. The output shaft of the motor 31 is fixedly connected to a gear 32. A tooth groove 33 meshing with the gear 32 is formed on the side wall of the chuck 304. A horizontal sensor 34 for opening and closing the motor 31 is fixedly connected to the side wall of the chuck 304. At this time, when the chuck 304 rotates, the horizontal sensor 34 will move, so that the PLC programmable controller can be used to control the motor 31 to drive the gear 32 to rotate, so as to make the chuck 304 rotate and correct to ensure that the chuck 304 is in a horizontal state.

[0061] Among them, the above-mentioned horizontal sensor 34 is an existing technology and does not involve its improvement, so the specific structure thereof will not be elaborated too much.

[0062] In a further preferred embodiment of the present invention, as Figure 9 shown, by making the telescopic sleeve 6 include an outer tube 601, which is fixedly connected to the air inlet position of the sliding sleeve 302; an inner tube 602, which is slidably arranged in the outer tube 601. The outer wall of the inner tube 602 contacts the inner wall of the outer tube 601 through a seal member III 35. One end of the inner tube 602 extending out of the outer tube 601 is fixedly connected to the air inlet position of the extension tube 303, which can ensure that when the extension tube 303 slides, it can still be stably connected to the airtight space I 5.

[0063] And in Figure 8 and Figure 9 it can be seen that the seal member I 4, the seal member II 8 and the seal member III 35 are all structures in which a base for installing a sealing ring cooperates with the sealing ring to make the inner and outer walls of different components fit tightly.

[0064] The implementation principle of the above embodiments is as follows: Place the PCB between the two positioning components 3, and then start the air pump 3052 through the PLC programmable controller to inject air into the air tank 3051. The air will be injected into the airtight space I 5 of the two positioning components 3 through the air supply pipe 3053, thereby driving the chuck 304 to clamp and tighten the PCB, ensuring that the surface of the PCB is in a horizontal state.

[0065] Subsequently, the PLC programmable controller can be used to control the chip mounting unit 2 to mount electronic components on the surface of the PCB. After the upper surface mounting is completed, the PCB is flipped and the lower surface of the PCB is mounted, realizing efficient chip mounting of the PCB.

[0066] Finally, after the PCB chip mounting is completed, by controlling the other air pump 3052 to pump air, the chuck 304 can be released to facilitate the unloading of the PCB.

[0067] It is easy for those skilled in the art to understand that on the premise of no conflict, the above advantageous methods can be freely combined and superimposed.

[0068] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above is only the preferred implementation manner of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present invention, several improvements and variations can be made, and these improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A displacement-preventing chip mounting device for an SMT mounter, characterized in that, include: A base (1) for mounting the patch device; A positioning component (3) is arranged on the top of the base (1) and is used to clamp the PCB. The positioning component (3) comprises a sleeve (301), two of which are provided and are slidably connected to the left and right sides of the base (1) respectively; A sliding sleeve (302) is slidably connected in the sleeve (301), and a sealing member (4) is provided on the outer wall of the sliding sleeve (302) so that an airtight space (5) is formed between the sliding sleeve (302) and the sleeve (301); An extension tube (303) is slidably connected in the sliding sleeve (302) via a telescopic sleeve (6); a turnover unit (7) is provided between the extension tube (303) and the sliding sleeve (302); a sealing member (8) is connected to one end of the extension tube (303) close to the telescopic sleeve (6) so that an airtight space (9) is formed between the sealing member (8) and the turnover unit (7); and a pressure relief valve (10) for exhausting air into the airtight space (9) is installed on the outer wall of the extension tube (303); A chuck (304) is connected to the end of the extension tube (303); a receiving groove (11) is provided on the side of the chuck (304) facing away from the extension tube (303); a slide groove (12) is provided on the top and bottom of the chuck (304); the opposite sides of the two slide grooves (12) are connected to the extension tube (303) through a pressure chamber (13); a piston (14) is slidably connected in the slide groove (12); the bottom of the piston (14) extends into the receiving groove (11) and is fixedly connected to a pressure plate (15); A driving member (305) is mounted at the bottom of the base (1) and is used to supply air to the airtight space 1 (5).

2. The anti-displacement chip mounting device for an SMT mounter according to claim 1, characterized in that, The driving member (305) comprises an air box (3051) which is fixedly connected to the bottom of the base (1); Two air pumps (3052) are provided, and both air pumps (3052) are connected to the air box (3051) and are used for pumping and injecting air respectively; Two air supply pipes (3053) are provided, so that the air box (3051) supplies air to the two airtight spaces (5) through the two air supply pipes (3053).

3. The anti-displacement chip mounting device for an SMT mounter according to claim 2, wherein The flip unit (7) comprises a baffle (701) which is sleeved on the extension tube (303); a circular groove (16) which fits with the outer wall of the baffle (701) is provided at the opening of the sliding sleeve (302), so that the baffle (701) and the second sealing member (8) cooperate to form the second airtight space (9); A one-way bearing (702) is sleeved on the extension tube (303), the one-way bearing (702) is fixedly connected to the baffle (701), the inner ring of the one-way bearing (702) is connected to a ball (17), and the outer wall of the extension tube (303) is spirally provided with a track groove (18) for the ball (17) to move; A sleeve (703) is fixedly connected to a side of the baffle (701) close to the second sealing member (8), and the inner wall of the sleeve (703) is in contact with the outer wall of the extension tube (303); An elastic member (704) is arranged at an opening position of the sliding sleeve (302) and is used to support the baffle (701).

4. The anti-displacement chip mounting device for an SMT mounter according to claim 3, characterized in that, The elastic member (704) includes a threaded cover (7041) which is threadedly connected to the opening of the sliding sleeve (302), such that the distance between the threaded cover (7041) and the baffle (701) is equal to half of the pitch of the track groove (18). A primary spring (7042) is disposed between the threaded cover (7041) and the baffle (701) for abutting against the baffle (701).

5. The anti-displacement chip mounting device for an SMT mounter according to claim 4, characterized in that, At the top of the inner wall of the circular groove (16), a limiting portion (19) is formed by protruding along the length direction of the circular groove (16). A limiting groove (20) for accommodating the limiting portion (19) is formed on the outer wall of the baffle (701). A through hole (21) is formed by penetrating upward on the side of the limiting portion (19) close to the seal member II (8), and a pressure relief valve II (22) is fixedly connected to the top of the through hole (21).

6. The anti-displacement chip mounting device for an SMT mounter according to claim 5, characterized in that, A secondary spring (23) is fixedly connected to the side of the seal member II (8) close to the telescopic sleeve (6). A pressure relief hole (24) is formed on the outer wall of the sliding sleeve (302) close to the seal member I (4).

7. The anti-displacement chip mounting device for an SMT mounter according to claim 6, characterized in that, A hydraulic press (25) is fixedly connected to the top of the sleeve (301). The output shaft of the hydraulic press (25) extends into the sleeve (301) and is fixedly connected to a positioning block (26). A friction surface (27) which fits the sliding sleeve (302) is machined on the bottom of the positioning block (26).

8. The anti-displacement chip mounting device for an SMT mounter according to claim 7, wherein, An installation groove (28) is formed on the bottom of the piston (14). A tertiary spring (29) for supporting the piston (14) is disposed in the installation groove (28). A pressure sensor (30) for opening and closing the hydraulic press (25) is fixedly connected to the bottom of the tertiary spring (29).

9. The anti-displacement chip mounting device for an SMT mounter according to claim 8, wherein, A motor (31) is fixedly connected to the end of the sliding sleeve (302) away from the sleeve (301). The output shaft of the motor (31) is fixedly connected to a gear (32). A tooth groove (33) which meshes with the gear (32) is formed on the side wall of the chuck (304). A horizontal sensor (34) for opening and closing the motor (31) is fixedly connected to the side wall of the chuck (304).

10. The anti-displacement chip mounting device for an SMT mounter according to claim 9, wherein, The telescopic sleeve (6) includes an outer tube (601) which is fixedly connected to the air inlet of the sliding sleeve (302). An inner tube (602) is slidably disposed in the outer tube (601). The outer wall of the inner tube (602) contacts the inner wall of the outer tube (601) through a seal member III (35). One end of the inner tube (602) extending out of the outer tube (601) is fixedly connected to the air inlet of the extension tube (303).

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