Circuit board chip mounter

Abstract

A circuit board chip mounter comprises a machine table, a feeder used for providing chip components is arranged on the machine table, a conveying device is further arranged on the machine table, and the conveying device comprises two conveying rails which are arranged side by side and support the edges of the two sides of a circuit board; the bearing device is used for upwards supporting the circuit board to be separated from the conveying device; and the feeding device is used for grabbing the surface-mounted elements provided by the feeder and transferring the surface-mounted elements to the circuit board of the conveying device. In the surface-mounting processing process, the bearing device can support the circuit board, and the surface-mounted element is grabbed on the feeder and mounted on the circuit board on the feeding device, so that the whole circuit board has relatively high rigidity and can resist the downward pressure in the surface-mounting process of the electronic element; and downward bending deformation and even damage of the circuit board due to no support below the circuit board are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic equipment, in particular to a circuit board placement machine. Background Art

[0002] Circuit boards are currently the most common electrical components. They miniaturize and visualize circuits, playing a crucial role in the mass production of fixed circuits and optimizing circuit layouts. With the miniaturization of electronic components, circuit boards are increasingly being manufactured using surface-mount components. SMT machines are used to transport electronic components onto the circuit boards for alignment and placement. Current SMT machines place circuit boards on a conveyor belt. Once transported to the placement station, a suction nozzle driven by a robotic arm or multiple linear actuators picks up the components and places them on the circuit board.

[0003] However, the conveyor belt is a flexible conveying device, and its supporting effect on the bottom of the circuit board is relatively small. In the process of mounting electronic components, a certain pressure is required to ensure the mounting effect. This will easily lead to different pressures on the upper and lower sides of the circuit board, which may easily cause damage to the circuit board and result in defective products.

[0004] Therefore, there is an urgent need for a circuit board placement machine to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a circuit board placement machine. In order to solve the above technical problems, this utility model adopts the following technical solutions:

[0006] A circuit board placement machine includes a machine platform, on which a feeder for providing patch components is provided, and further provided on the machine platform:

[0007] A conveying device, comprising two conveying tracks arranged side by side and supporting two side edges of the circuit board, for conveying the circuit board in a predetermined direction;

[0008] A supporting device, comprising a supporting assembly disposed between the two conveying rails, for lifting the circuit board upward and separating it from the conveying device, wherein the supporting assembly comprises a supporting cylinder and a supporting plate in transmission connection with the supporting cylinder;

[0009] The loading device is used to grab the patch components provided by the feeder and transfer them to the circuit board of the conveying device, which includes a suction head assembly and a transmission assembly for driving the suction head assembly to move back and forth between the conveying device and the feeder.

[0010] Furthermore, the conveying track includes

[0011] A conveying plate, wherein the conveying plate is arranged along a predetermined direction;

[0012] The conveying system is arranged on the conveying plate to convey the circuit board along a predetermined direction. The conveying system includes

[0013] The transmission wheel includes a plurality of transmission wheels, which are arranged along the length direction of the conveying plate and are rotatably connected to the conveying plate.

[0014] The transmission shaft has two ends which are rotatably connected to the two conveying plates and are fixed with driving wheels.

[0015] The conveyor belt is mounted on a plurality of transmission wheels and a driving wheel, and further includes

[0016] A transmission motor is connected to the transmission shaft for driving the transmission shaft to rotate around an axis.

[0017] Furthermore, the support plate includes

[0018] A bottom plate, the bottom plate being drivingly connected to the supporting cylinder;

[0019] a heat insulation board, fixedly mounted on the bottom plate;

[0020] A top plate, the top plate being arranged on the heat insulation plate and used for supporting the circuit board;

[0021] A heating element is fixedly installed between the heat insulation and the top plate and is electrically connected to a power source for generating heat and transferring the heat to the top plate.

[0022] Furthermore, the supporting device also includes

[0023] A slide assembly, the slide assembly is arranged on the machine along the conveying direction of the conveying device, and is connected to a fixed plate on the upper transmission, and drives the fixed plate to reciprocate along the conveying direction, and the supporting assembly is fixedly mounted on the fixed plate;

[0024] The clamping assembly includes two clamping assemblies respectively located outside the two conveying tracks, and the two clamping assemblies are both arranged on the fixed plate, and the clamping assembly includes a clamping claw for clamping the circuit board located on the conveying device.

[0025] Furthermore, the suction head assembly includes

[0026] A fixed seat, the fixed seat being mounted on the conveying assembly;

[0027] The mounting seat is connected to the fixing seat by sliding in the vertical direction.

[0028] A suction head unit, the suction head unit being connected to the mounting base, and a suction nozzle connected to an external air source is provided at the end of the suction head unit facing downward;

[0029] A first driving device is fixedly mounted on the fixing seat and is in transmission connection with the mounting seat, and is used for driving the mounting seat to move back and forth in a vertical direction.

[0030] Furthermore, the suction head unit includes:

[0031] A rotating shaft, the rotating shaft being rotatably connected to the mounting seat, and the rotating shaft being provided with a vent hole along its axis, the vent hole being a blind hole structure, and the rotating shaft being further provided with a plurality of connecting holes distributed along a circumferential direction, the connecting holes connecting the vent hole with the outside world, the suction nozzle being provided at an end of the rotating shaft and being in communication with the vent hole;

[0032] a second driving device, the second driving device being fixedly disposed on the mounting seat via a bracket and being in driving connection with the rotating shaft, for driving the rotating shaft to rotate around an axis;

[0033] A docking hole is provided on the mounting seat at a position corresponding to the connecting hole, one end of the docking hole corresponds to the connecting hole, and the other end is communicated with an external air source.

[0034] Furthermore, the suction head unit is also provided with

[0035] A guide rod, the guide rod is axially and slidably connected to the inside of the vent, and the guide rod is a hollow structure, and the suction nozzle is fixedly mounted on the end of the guide rod extending from the vent;

[0036] A cover is fixedly mounted on the end of the rotating shaft, and a through hole is provided on the cover for the guide rod to extend out;

[0037] A limit block, wherein the limit block is fixedly mounted on the guide rod, and the diameter of the limit block is larger than the diameter of the through hole;

[0038] The first elastic member is sleeved on the guide rod and located between the limiting block and the bottom of the vent hole, and is used for providing the guide rod with an elastic thrust in a direction away from the vent hole.

[0039] Furthermore, a base is fixedly provided on one end of the guide rod extending out of the vent hole, and the suction nozzle is fixedly mounted on the guide rod through the base.

[0040] Furthermore, a pressure sensor is mounted on one end of the guide rod extending out of the vent hole, a spacing space is provided between the pressure sensor and the mounting seat, and a second elastic member is mounted between the pressure sensor and the base, and the elastic coefficient of the second elastic member is smaller than the elastic coefficient of the first elastic member.

[0041] Furthermore, a screw is rotatably connected to the fixing seat, one end of the screw is transmission-connected to the first driving device for driving the screw to rotate, a nut is threadedly connected to the screw, and the nut is fixedly connected to the mounting seat.

[0042] The beneficial effects produced by the utility model are as follows:

[0043] During the process of mounting the circuit board, the circuit board is transmitted on the conveying device. Specifically, the two ends of the circuit board are respectively overlapped on the two conveying tracks and are transported by the two conveying tracks at the same time to the position corresponding to the support component. The conveying track stops conveying, and the support plate is raised by the drive of the support cylinder, thereby lifting the circuit board located on the conveying track, thereby supporting the circuit board. The loading device grabs the patch components on the feeder and mounts them on the circuit board. The support plate can provide supporting force for the circuit board, so that the circuit board as a whole has higher rigidity and can resist the downward pressure during the process of mounting electronic components, avoiding the circuit board from bending downward or even being damaged due to lack of support from below. The technical solution provided in this embodiment can effectively ensure the reliability of the circuit board during the mounting process and prevent the circuit board from being damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0045] Figure 2 It is a structural schematic diagram of the conveying device and the supporting device in the utility model.

[0046] Figure 3 It is a schematic diagram of the exploded structure of the conveying device and the supporting device in the utility model.

[0047] Figure 4 It is a schematic diagram of the exploded structure of the supporting assembly in the utility model.

[0048] Figure 5 It is a structural diagram of the machine and the feeding device in the utility model.

[0049] Figure 6 This is a schematic structural diagram of the suction head assembly in the present invention.

[0050] Figure 7This is a schematic diagram of the exploded structure of the suction head assembly in the present invention after the CCD camera is removed.

[0051] Figure 8 It is a structural schematic diagram of the mounting base and the suction head unit in the present invention.

[0052] Figure 9 It is a cross-sectional view of the mounting base and the suction head unit in the present invention.

[0053] Figure 10 for Figure 9 A partial enlarged view of point A in the middle.

[0054] In the figure: 100-machine; 110-feeder feeder; 200-conveying device; 210-conveying track; 300-supporting device; 310-supporting assembly; 311-supporting cylinder; 312-supporting plate; 400-loading device; 410-suction head assembly; 420-conveying assembly; 211-conveying plate; 212-conveying system; 2121-drive wheel; 2122-drive shaft; 2123-conveying belt; 3121-bottom plate; 3122-insulating plate; 3123-top plate; 3124-heating element; 320-slide assembly; 321-fixed plate; 330-clamp Holding assembly; 331-clamping claw; 411-fixing seat; 412-mounting seat; 413-suction head unit; 4131-suction nozzle; 414-first driving device; 4132-rotating shaft; 4133-vent; 4134-connecting hole; 4135-second driving device; 4121-docking hole; 4136-guide rod; 4137-sealing cover; 4138-limiting block; 4139-first elastic member; 415-base; 416-pressure sensor; 417-second elastic member; 4111-screw; 4112-nut; 3125-heat conducting plate; 430-CCD camera. DETAILED DESCRIPTION

[0055] In order to facilitate understanding by those skilled in the art, the present invention will be further described below in conjunction with the embodiments and drawings. The contents mentioned in the embodiments are not intended to limit the present invention. The present invention will be described in detail below in conjunction with the drawings.

[0056] An embodiment of the utility model provides a circuit board placement machine for placing electronic components on a circuit board. The machine can support the circuit board during the placement process, ensure the reliability of the placement of electronic components, and prevent the circuit board from being deformed or crushed under the action of downward pressure.

[0057] like Figure 1-10As shown, the embodiment of the present invention provides a circuit board placement machine, including an organic platform 100, on which a feeder feeder 110 for providing patch components is provided. At the same time, the machine 100 is also provided with: a conveying device 200, a supporting device 300 and a loading device 400, wherein the conveying device 200 includes two conveying rails 210 arranged side by side and supporting the edges of the circuit board on both sides, so as to convey the circuit board in a predetermined direction; the supporting device 300 includes a conveying rail 210 arranged on the two conveying rails 210. 0, is used to lift the circuit board upward and separate it from the conveying device 200, and the supporting component 310 includes a supporting cylinder 311 and a supporting plate 312 that is transmission-connected to the supporting cylinder 311; the loading device 400 is used to grab the patch components provided by the feeder 110 and transfer them to the circuit board of the conveying device 200, which includes a suction head component 410 and a transmission component 420 for driving the suction head component 410 to move back and forth between the conveying device 200 and the feeder 110.

[0058] During the process of mounting the circuit board, the circuit board is transmitted on the conveying device 200. Specifically, the two ends of the circuit board are respectively overlapped on the two conveying rails 210 and are transported by the two conveying rails 210 at the same time to the position corresponding to the supporting component 310. The conveying rails 210 stop conveying, and the supporting plate 312 is raised under the drive of the supporting cylinder 311, thereby lifting the circuit board located on the conveying rail 210, thereby supporting the circuit board. The loading device 400 grabs the patch components on the feeder 110 and mounts them on the circuit board. The supporting plate 312 can provide supporting force for the circuit board, so that the circuit board as a whole has higher rigidity and can resist the downward pressure during the process of mounting electronic components, thereby avoiding the circuit board from bending downward or even being damaged due to lack of support from below. The technical solution provided in this embodiment can effectively ensure the reliability of the circuit board during the mounting process and prevent the circuit board from being damaged.

[0059] In this embodiment, if Figure 1-4As shown, the conveyor track 210 includes a conveyor plate 211 and a conveyor system 212, wherein the conveyor plate 211 is vertically arranged and arranged along a predetermined direction. The conveyor system 212 is arranged on the conveyor plate 211 and is used to convey the circuit board along the predetermined direction. In this embodiment, the conveyor system 212 includes a transmission wheel 2121, a transmission shaft 2122, a conveyor belt 2123, and a conveyor motor (not shown in the figure). The transmission wheels 2121 include a plurality of transmission wheels 2121 and are arranged along the length of the conveyor plate 211 and are rotatably connected to the conveyor plate 211. The transmission shaft 2122 has two ends that are rotatably connected to the two conveyor plates 211 and are fixedly provided with driving wheels. The conveyor belt 2123 is mounted on the plurality of transmission wheels 2121 and the driving wheels. The conveyor motor is in transmission connection with the transmission shaft 2122 to drive the transmission shaft 2122 to rotate about its axis. In this embodiment, the conveying motor can be set to one, so that the conveying system 212 on the two conveying tracks 210 can be driven by one conveying motor, and the conveying speed on the two conveying tracks 210 is the same, thereby ensuring the accuracy of the circuit board conveyance and preventing deviation.

[0060] In the process of mounting electronic components and other patch components on the circuit board, it is necessary to heat the circuit board and the patch components so that the mounting process can be better performed, such as Figure 3-4 As shown, the supporting plate 312 includes a bottom plate 3121, a heat insulation plate 3122, a top plate and a heating element 3124, wherein the bottom plate 3121 is transmission-connected to the supporting cylinder 311; the heat insulation plate 3122 is fixedly mounted on the bottom plate 3121; the top plate 3123 is arranged on the heat insulation plate 3122 to support the circuit board; the heating element 3124 is fixedly mounted between the heat insulation and the top plate 3123, and is electrically connected to the power supply to generate heat and transfer the heat to the top plate 3123. In order to better transmit the heat generated by the heating element 3124, a heat conducting plate 3125 is further provided on the lower side of the top plate 3123. The heat conducting plate 3125 is in direct contact with the heating element 3124, so that the heat emitted by the heating element 3124 can be evenly and quickly transferred to the top plate 3123, which is used to heat the circuit board and chip components undergoing mounting processing. In this embodiment, the heating element 3124 is a device in the prior art that can generate heat by passing current, such as a heating resistor.

[0061] In order to make the support of the circuit board more convenient and stable, the support device is also provided with a slide assembly 320 and a clamping assembly 330, wherein the slide assembly is used to drive the support assembly 310 and the clamping assembly 330 to move along the conveying direction, so as to actively lift and move the circuit board on the conveying track 210, and clamp the circuit board in the process of lifting and moving the circuit board, thereby ensuring the stability of the circuit board and the stability and accuracy of the placement process. Figure 3 As shown, the slide assembly 320 is arranged on the machine 100 along the conveying direction of the conveying device 200, and is connected to a fixed plate 321 on the upper transmission, and drives the fixed plate 321 to move back and forth along the conveying direction. The supporting assembly 310 is fixedly mounted on the fixed plate 321; the clamping assembly 330 includes two clamping assemblies 330 respectively located on the outside of the two conveying rails 210, and the two clamping assemblies 330 are both arranged on the fixed plate 321. The clamping assembly 330 includes a clamping claw 331 for clamping the circuit board located on the conveying device 200.

[0062] When the circuit board needs to be supported and moved, the slide assembly 320 drives the supporting assembly 310 and the clamping assembly 330 toward the circuit board, actively receiving the circuit board and lifting it upward. At this time, the clamping assembly 330 clamps both ends of the lifted circuit board to ensure the stability of the circuit board. Subsequently, the slide assembly drives the supporting assembly 310 and the clamping assembly 330 to move along the conveying direction and move them to a position corresponding to the loading device 400 for placement processing on the circuit board. The clamping assembly 330 clamps the circuit board, thereby ensuring the stability of the circuit board during the support and placement processing.

[0063] In this embodiment, if Figure 5-10As shown, when the circuit board is being mounted, the suction head assembly 410 moves toward the feeder 110 via the conveying assembly 420, thereby sucking the patch components provided by the feeder 110. In this embodiment, the patch components can be electronic components or adhesive tapes for mounting, etc., and there is no restriction again. After the absorption is completed, the conveying assembly 420 moves the suction head assembly 410 with the patch components toward the supporting assembly 310, thereby mounting the patch components on the circuit board. In this embodiment, the head assembly includes a fixed base 411, a mounting base 412, a suction head unit 413, and a first drive device 414. The fixed base 411 is mounted on the conveying assembly 420; the mounting base 412 is slidably connected to the fixed base 411 in the vertical direction, the suction head unit 413 is connected to the mounting base 412, and the suction head unit 413 is provided with a suction nozzle 4131 connected to an external air source at the lower end thereof; the first drive device 414 is fixedly mounted on the fixed base 411 and is in transmission connection with the mounting base 412, and is used to drive the mounting base to reciprocate in the vertical direction. The mounting base 412 and the suction head unit 413 located thereon are driven by the first drive device 414 to reciprocate in the vertical direction, thereby facilitating the suction nozzle 4131 to pick up and place patch components. In this embodiment, the first driving device 414 is a motor, and is transmission-connected to the mounting base 412 through a screw 4111 structure. Specifically, a screw 4111 is rotatably connected to the fixing base 411, and one end of the screw 4111 is transmission-connected to the first driving device 414 to drive the screw 4111 to rotate. A nut 4112 is threadedly connected to the screw 4111, and the nut 4112 is fixedly connected to the mounting base 412. The screw 4111 mechanism can stably and accurately move the mounting base 412 and the suction head unit 413 to ensure the accuracy of the mounting process.

[0064] like Figure 6 A CCD camera 430 is also installed on the fixing base 411 to take pictures of the circuit board after placement, thereby collecting the post-placement status and transmitting it to the controller for detection of placement qualification. At the same time, it is also used to detect the status of the patch components on the feeder 110 to determine whether the patch components are compatible with the placement position on the circuit board.

[0065] In order to accurately mount the patch components on the circuit board, the suction head unit 413 is provided with a rotating structure. When the patch components on the feeder 110 do not correspond to the mounting positions on the circuit board, the patch components sucked by the suction head unit 413 can be rotated so that they correspond to the mounting positions, thereby ensuring the accuracy of the mounting. Figure 7-10As shown, the suction head unit 413 includes: a rotating shaft 4132 and a second driving device, wherein the rotating shaft 4132 is rotatably connected to the mounting base 412, and the rotating shaft 4132 is provided with a vent hole 4133 along the axis, the vent hole 4133 is a blind hole structure, and a plurality of connecting holes 4134 distributed along the circumferential direction are also provided on the rotating shaft 4132, the connecting holes 4134 connect the vent hole with the outside world, and the suction nozzle 4131 is provided at the end of the rotating shaft 4132 and is communicated with the vent hole 4133; the second driving device is fixedly provided on the mounting base 412 through a bracket, and is transmission-connected to the rotating shaft 4132, for driving the rotating shaft 4132 to rotate around the axis; at the same time, a docking hole 4121 is provided on the mounting base 412 at a position corresponding to the connecting hole 4134, one end of the docking hole 4121 corresponds to the connecting hole 4134, and the other end is communicated with the external air source.

[0066] The rotating shaft 4132 is driven by the second driving device to rotate, so that the sucked patch component can be aligned with the mounting position, and the mounting accuracy can be guaranteed during the mounting process.

[0067] In order to avoid excessive pressure from the suction nozzle 4131 toward the circuit board during the mounting process, an elastic buffer structure is provided on the suction head unit 413 to elastically buffer the downward pressure of the suction nozzle 4131 to ensure that the circuit board will not be damaged by excessive pressure.

[0068] Specifically, a guide rod 4136, a cover 4137, a limit block 4138 and a first elastic member 4139 are provided on the suction head unit 413, wherein the guide rod 4136 is axially and slidingly connected to the vent in a sealed manner, and the guide rod 4136 has a hollow structure, and the suction nozzle 4131 is fixedly mounted on the end of the guide rod 4136 extending from the vent 4133; the cover 4137 is fixedly mounted on the end of the rotating shaft 4132, and a through hole is provided on the cover 4137 for the guide rod 4136 to extend out; the limit block 4138 is fixedly mounted on the guide rod 4136, and the diameter of the limit block 4138 is larger than the diameter of the through hole; the first elastic member 4139 is mounted on the guide rod 4136 and is located between the limit block 4138 and the bottom of the vent 4133, so as to provide the guide rod 4136 with an elastic thrust in the direction away from the vent 4133.

[0069] During the process of the first driving device 414 driving the suction head unit 413 to move downward to mount or adsorb components, when the suction nozzle 4131 contacts the surface of the circuit board or the feeder 110, the guide rod 4136 moves upward under the action of resistance, thereby compressing the first elastic member 4139, so that the pressure of the suction head unit 413 is absorbed by the first elastic member 4139, achieving an elastic buffering effect, and avoiding pressure loss on the circuit board or the feeder 110 due to excessive pressure from the suction head unit 413.

[0070] In order to detect the downward pressure of the suction head unit 413, thereby facilitating the control of the stroke of the suction head unit 413 driven downward by the first driving device 414, a pressure sensor 416 is further provided on the guide rod 4136. Specifically, Figure 8-10 As shown, a base 415 is fixedly mounted on the end of the guide rod 4136 extending from the vent hole 4133, and the suction nozzle 4131 is fixedly mounted on the guide rod 4136 via the base 415. A pressure sensor 416 is mounted on the end of the guide rod 4136 extending from the vent hole 4133. A space is provided between the pressure sensor 416 and the mounting base 412. A second elastic member 417 is mounted between the pressure sensor 416 and the base 415, and the elastic coefficient of the second elastic member 417 is smaller than that of the first elastic member 4139.

[0071] When the first driving device 414 moves the suction head unit 413 downward to pick up materials or place them, the suction nozzle 4131 contacts the feeder 110 or the circuit board, so that the guide rod 4136 moves upward under the action of resistance, so that the first elastic member 4139 is compressed. At this time, the end of the guide rod 4136 extending out of the vent 4133 retracts toward the vent 4133, so that the pressure sensor 416 contacts the mounting base 412 and is gradually pressed against the mounting base 412 under the elastic force of the second elastic member 417. At this time, the pressure sensor 416 transmits a pressure signal to the controller to monitor the pressing force between the suction nozzle 4131 and the circuit board or the feeder 110.

[0072] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Although the present invention is disclosed as above in terms of preferred embodiments, they are not intended to limit the present invention. Any technician familiar with the profession can, without departing from the scope of the technical solution of the present invention, make some changes or modifications to equivalent embodiments using the technical content disclosed above. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technology of the present invention, which do not depart from the content of the technical solution of the present invention, are within the scope of the technical solution of the present invention.

Claims

1. A circuit board placement machine, comprising a machine platform, on which a feeder for providing patch components is provided, characterized in that: The machine is also provided with: A conveying device, comprising two conveying tracks arranged side by side and supporting two side edges of the circuit board, for conveying the circuit board in a predetermined direction; A supporting device, comprising a supporting assembly disposed between the two conveying rails, for lifting the circuit board upward and separating it from the conveying device, wherein the supporting assembly comprises a supporting cylinder and a supporting plate in transmission connection with the supporting cylinder; The loading device is used to grab the patch components provided by the feeder and transfer them to the circuit board of the conveying device, which includes a suction head assembly and a transmission assembly for driving the suction head assembly to move back and forth between the conveying device and the feeder.

2. A circuit board placement machine according to claim 1, characterized in that: The conveying track includes A conveying plate, wherein the conveying plate is arranged along a predetermined direction; The conveying system is arranged on the conveying plate to convey the circuit board along a predetermined direction. The conveying system includes The transmission wheel includes a plurality of transmission wheels, which are arranged along the length direction of the conveying plate and are rotatably connected to the conveying plate. The transmission shaft has two ends which are rotatably connected to the two conveying plates and are fixed with driving wheels. The conveyor belt is mounted on a plurality of transmission wheels and a driving wheel, and further includes A transmission motor is connected to the transmission shaft for driving the transmission shaft to rotate around an axis.

3. A circuit board placement machine according to claim 2, characterized in that: The supporting plate includes A bottom plate, the bottom plate being drivingly connected to the supporting cylinder; a heat insulation board, fixedly mounted on the bottom plate; A top plate, the top plate being arranged on the heat insulation plate and used for supporting the circuit board; A heating element is fixedly installed between the heat insulation and the top plate and is electrically connected to a power source for generating heat and transferring the heat to the top plate.

4. A circuit board placement machine according to claim 1, characterized in that: The supporting device also includes A slide assembly, the slide assembly is arranged on the machine along the conveying direction of the conveying device, and is connected to a fixed plate on the upper transmission, and drives the fixed plate to reciprocate along the conveying direction, and the supporting assembly is fixedly mounted on the fixed plate; The clamping assembly includes two clamping assemblies respectively located outside the two conveying tracks, and the two clamping assemblies are both arranged on the fixed plate, and the clamping assembly includes a clamping claw for clamping the circuit board located on the conveying device.

5. A circuit board placement machine according to claim 1, characterized in that: The suction head assembly includes A fixed seat, the fixed seat being mounted on the conveying assembly; The mounting seat is connected to the fixing seat by sliding in the vertical direction. A suction head unit, the suction head unit being connected to the mounting base, and the suction head unit having a suction nozzle connected to an external air source provided at a lower end thereof; A first driving device is fixedly mounted on the fixing seat and is in transmission connection with the mounting seat, and is used for driving the mounting seat to move back and forth in a vertical direction.

6. A circuit board placement machine according to claim 5, characterized in that: The suction head unit includes: A rotating shaft, the rotating shaft being rotatably connected to the mounting seat, and the rotating shaft being provided with a vent hole along its axis, the vent hole being a blind hole structure, and the rotating shaft being further provided with a plurality of connecting holes distributed along a circumferential direction, the connecting holes connecting the vent hole with the outside world, the suction nozzle being provided at an end of the rotating shaft and being in communication with the vent hole; a second driving device, the second driving device being fixedly disposed on the mounting seat via a bracket and being in driving connection with the rotating shaft, for driving the rotating shaft to rotate around an axis; A docking hole is provided on the mounting seat at a position corresponding to the connecting hole, one end of the docking hole corresponds to the connecting hole, and the other end is communicated with an external air source.

7. A circuit board placement machine according to claim 6, characterized in that: The suction head unit is also provided with A guide rod, the guide rod is axially and slidably connected to the inside of the vent, and the guide rod is a hollow structure, and the suction nozzle is fixedly mounted on the end of the guide rod extending from the vent; A cover, the cover being fixedly mounted on the end of the rotating shaft, and having a through hole for the guide rod to extend therethrough; A limit block, wherein the limit block is fixedly mounted on the guide rod, and the diameter of the limit block is larger than the diameter of the through hole; The first elastic member is sleeved on the guide rod and located between the limiting block and the bottom of the vent hole, and is used for providing the guide rod with an elastic thrust in a direction away from the vent hole.

8. A circuit board placement machine according to claim 7, characterized in that: A base is fixedly provided on one end of the guide rod extending out of the vent hole, and the suction nozzle is fixedly mounted on the guide rod through the base.

9. A circuit board placement machine according to claim 8, characterized in that: A pressure sensor is also mounted on the end of the guide rod extending out of the vent hole. A spacing space is provided between the pressure sensor and the mounting seat, and a second elastic member is provided between the pressure sensor and the base, and the elastic coefficient of the second elastic member is smaller than the elastic coefficient of the first elastic member.

10. A circuit board placement machine according to claim 5, characterized in that: A screw is rotatably connected to the fixing seat, one end of the screw is transmission-connected to the first driving device for driving the screw to rotate, a nut is threadedly connected to the screw, and the nut is fixedly connected to the mounting seat.

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