Power module terminal feeding device and feeding method thereof

Abstract

The invention provides a power module terminal feeding device and a feeding method thereof, and relates to the technical field of semiconductor packaging, the feeding device comprises a vibration module, the vibration module comprises a motor, the motor is provided with a filling box, the inner circumference of the filling box is provided with a spiral transmission track, and the top end of the spiral transmission track is provided with a discharging butt joint port; the pneumatic separation guide rail comprises a guide rail body, a conveying rail is arranged in the length direction of the guide rail body, a grating sensor and a gas transmission assembly are arranged on the guide rail body on the same side of the conveying rail, a blocking piston and a separation piston are arranged at one end of the conveying rail, and a discharging port is formed in the bottom of the conveying rail. The material distributing mechanism comprises a driving motor, a material distributing disc is arranged on the driving motor, the material distributing disc is provided with a gas track butt joint discharging port, and a controller is electrically connected with the motor, the grating sensor and the driving motor. The power module terminal feeding stability is higher, an automatic structure feeding mode is used, the equipment efficiency is improved, manual operation is avoided, and the risk of material pollution and deformation is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of semiconductor packaging, and in particular to a feeding device and a feeding method for power module terminals. Background Art

[0002] In the existing power module terminal packaging and manufacturing process, the power module terminals are mainly supplied in bulk packaging. Before the mounting process, the bulk terminal components need to be placed in a customized patch waffle box manually using auxiliary fixtures. The mounting equipment grabs the components in the waffle box with the terminal components placed for mounting. In this process, manual placement of terminal components and replacement of waffle boxes on the patch equipment are required frequently, resulting in low efficiency of the patch process, and easily causing contamination or deformation of the power module terminals, making it difficult to control the position and verticality of the terminal components after welding or exceeding the process specifications, resulting in a decrease in the yield of the subsequent power terminal insertion process. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a feeding device and a feeding method for a power module terminal. The feeding stability of the power module terminal is higher, an automated structure feeding method is used, equipment efficiency is improved, manual operation is avoided, the risk of material contamination and deformation is reduced, the feeding process is more reasonable, and costs are reduced and efficiency is increased.

[0004] The technical solution adopted by the present invention is: A feeding device for power module terminals, comprising: A vibration module, the vibration module comprising a motor, an annular filling box is arranged on the motor, a spiral transmission track is arranged on the inner circumference of the filling box, and a discharge interface is arranged at the top end of the spiral transmission track extending outward in a radial plane; A pneumatic separation guide rail, the pneumatic separation guide rail comprising a guide rail body, a transport track extending along the length direction of the inner side wall of the guide rail body, one end of the transport track cooperating with the discharge interface, a grating sensor and a gas transmission component are arranged on the guide rail body on the same side of the transport track, the transport track and the gas transmission component are connected to each other, a turning port is arranged at one end of the transport track, a blocking piston and a separation piston are arranged in sequence at one end of the transport track close to the turning port, and a discharge port is arranged at one end of the guide rail body close to the turning port; A material distribution mechanism, the material distribution mechanism comprises a driving motor, a material distribution plate is arranged on the driving motor, a surface of the material distribution plate facing away from the driving motor is provided with a plurality of air rail docking discharge ports spaced along the circumferential direction, and the air rail docking discharge ports cooperate with the discharge port; A controller is electrically connected to the motor, the grating sensor, the drive motor, and the patch motor.

[0005] Preferably, for the feeding device of the power module terminals, the vibration module further includes a vibration disk mounting base, and a motor is arranged on the vibration disk mounting base.

[0006] Preferably, for the feeding device of the power module terminals, the guide rail body includes two guide rail components, and a discharge track is arranged on one side of each guide rail component. The two discharge tracks are combined to form a transport track, and the shape of the transport track matches the shape of the power module terminals.

[0007] Preferably, for the feeding device of the power module terminals, the gas transmission component includes a gas input port, a gas guide groove, and a pneumatic transmission groove. The gas input port is arranged on the side wall of the guide rail component, the gas guide groove is arranged on the guide rail component below the discharge track, the gas guide groove extends along the length direction of the guide rail component, and a plurality of pneumatic transmission grooves are arranged at intervals between the discharge track and the gas guide groove. The discharge track and the gas guide groove are communicated through the pneumatic transmission grooves.

[0008] Preferably, for the feeding device of the power module terminals, an arc-shaped turning groove is arranged at one end of each discharge track, and the two turning grooves are combined to form a turning port. A blocking piston and a separating piston are sequentially arranged at the end of the discharge track close to the turning groove, and the turning groove extends to the upper side of the bottom of the guide rail body; the separating piston is connected to a first cylinder, the blocking piston is connected to a second cylinder, and both the first cylinder and the second cylinder are connected to a controller.

[0009] Preferably, for the feeding device of the power module terminals, the insertion end length of the separating piston is less than the insertion end length of the blocking piston.

[0010] Preferably, for the feeding device of the power module terminals, a mounting base is arranged on the driving motor, the output end of the driving motor passes through the mounting base and is connected to the material distribution disk, and a material distribution disk mounting bracket is further arranged at the output end of the driving motor.

[0011] Preferably, for the feeding device of the power module terminals, at least one separating disk throwing port is further arranged on the material distribution disk, an installation cavity is arranged on one surface of the mounting base close to the material distribution disk, a material throwing box is arranged in the installation cavity, and the material throwing box is connected to the separating disk throwing port.

[0012] A feeding method for a feeding device applied to power module terminals, which includes the following steps: Step S1. Add the power module terminals to the filling box. When the grating sensor receives the light source signal, the controller controls the motor of the vibration module to start. The power module terminals are spirally lifted by the vibration of the motor, automatically sorted and transmitted to the spiral transmission track, and transported to the transport track through the discharge interface. Step S2. Introduce compressed air into the gas input port, and conduct the compressed air through the gas guiding groove and the pneumatic transmission groove into the transportation track. Push the power module terminal forward through the compressed air, control the separation piston to insert through the first cylinder to fix the power module terminal at the lower end, and then control the blocking piston to connect through the second cylinder to release the foremost power module terminal. Step S3. Dock the discharge port with the material distribution tray. Output the power module terminal through the discharge port into the air rail docking and feeding port. The power module terminal that fails to be picked up by the chip mounter at the picking port drops into the separation tray throwing port and finally falls into the material throwing box for waste collection.

[0013] Preferably, in the feeding method, the power of the motor in Step S1 is 15 - 25W; the conveying air pressure of the compressed air in Step S2 is 0.4 - 0.6MPa, and the switching pressure of the first cylinder and the second cylinder is 0.6 - 0.9MPa.

[0014] Advantages of the present invention: For the feeding device and feeding method of the power module terminal of the present invention, the feeding stability of the power module terminal is higher. It uses an automated structure feeding method, improves the equipment efficiency, avoids manual operation, reduces the risk of material pollution and deformation, the feeding process is more reasonable, and reduces costs and increases efficiency. Description of the Drawings

[0015] Figure 1 It is a schematic structural diagram of the vibration module of the present invention.

[0016] Figure 2 It is a schematic structural diagram of the pneumatic separation guide rail of the present invention.

[0017] Figure 3 It is a schematic structural diagram of the guide rail assembly.

[0018] Figure 4 It is a schematic structural diagram of the material distribution mechanism of the present invention.

[0019] Figure 5 It is a schematic structural diagram of the power module terminal of the present invention.

[0020] Figure 6 It is a schematic structural diagram of the feeding device of the power module terminal.

[0021] Figure 7 It is a schematic circuit connection diagram of the feeding device of the power module terminal of the present invention. Detailed Embodiments

[0022] The present invention will be further described below in conjunction with specific embodiments.

[0023] Embodiment 1 As Figures 1 - 7 , a feeding device for power module terminals, which includes: A vibration module 1, the vibration module 1 includes a motor 12, an annular filling box 13 is arranged on the motor 12, a spiral transmission track 14 is arranged on the inner circumference of the filling box 13, and the top end of the spiral transmission track 14 extends outward in the radial plane to set a discharge docking port 16; A pneumatic separation guide rail 2, the pneumatic separation guide rail 2 includes a guide rail body, a transportation track is arranged along the length direction of the inner side wall of the guide rail body, one end of the transportation track is matched with the discharge docking port 16, a grating sensor 22 and a gas transmission component are arranged on the guide rail body on the same side of the transportation track, the transportation track and the gas transmission component are communicated with each other, a turning port is arranged at one end of the transportation track, a blocking piston 27 and a separation piston 26 are arranged in sequence at one end of the transportation track close to the turning port, and a discharge port 29 is arranged at one end of the guide rail body close to the turning port; A material distribution mechanism 3, the material distribution mechanism 3 includes a driving motor 31, a material distribution disk 33 is arranged on the driving motor 31, and a plurality of air rail docking and discharging ports 35 are arranged at intervals along the circumferential direction on the surface of the material distribution disk 33 facing away from the driving motor 31, and the air rail docking and discharging ports 35 are matched with the discharge port 29; A controller, which is electrically connected to the motor 12, the grating sensor 22, the driving motor 31, and the patch motor.

[0024] The vibration module 1 further includes a vibration disk mounting base 11, and the motor 12 is arranged on the vibration disk mounting base 11; the vibration disk mounting base 11 is used to mount the vibration module 1 on the equipment, and the position adjustment and fixation of the vibration module 1 can be realized. The reasonable vibration frequency of the motor 12 enables the materials in the filling box 13 to be arranged and transmitted upward in an orderly manner through the spiral transmission track 14; the filling box 13 is used to fill the bulk materials of the power module terminals; the discharge docking port 16 realizes the transmission connection with the pneumatic track.

[0025] The guide rail body includes two guide rail components 20, a discharge track 21 is arranged on one side of each guide rail component 20, and the two discharge tracks 21 are combined to form a transportation track, and the shape of the transportation track is matched with the shape of the power module terminal.

[0026] The gas transmission component includes a gas input port 23, a gas guide groove 24 and a pneumatic transmission groove 25. The gas input port 23 is arranged on the side wall of the guide rail component 20, the gas guide groove 24 is arranged on the guide rail component 20 below the discharge track 21, the gas guide groove 24 extends along the length direction of the guide rail component 20, and a plurality of pneumatic transmission grooves 25 are arranged at intervals between the discharge track 21 and the gas guide groove 24, and the discharge track 21 and the gas guide groove 24 are communicated through the pneumatic transmission grooves 25.

[0027] An arc-shaped steering groove 28 is provided at one end of each discharge track 21, and the two steering grooves 28 are combined to form a steering port. A blocking piston 27 and a separating piston 26 are sequentially arranged at the end of the discharge track 21 close to the steering groove 28. The steering groove 28 extends to the upper side of the bottom of the guide rail body; the separating piston 26 is connected to a first cylinder, the blocking piston 27 is connected to a second cylinder, and both the first cylinder and the second cylinder are connected to a controller; the insertion end length of the separating piston 26 is less than the insertion end length of the blocking piston 27.

[0028] The discharge track 21 realizes the power module terminal transmission docking with the vibration module 1; the grating sensor 22 collects the material position information and is also the vibration motor switch of the vibration module to realize the material feeding control; the gas input port 23 is a compressed air input port; the gas guiding groove 24 plays a role in guiding the gas at the compressed air input end; the pneumatic transmission groove 25 realizes the introduction of compressed air into the transport track to push the power module terminal forward by air pressure; the separating piston 26 is controlled by the first cylinder and is in parallel control with the blocking piston 27. The separating piston 26 can be inserted to fix the terminal assembly at the lower end; the blocking piston 27 is controlled by the second cylinder and is in parallel control with the separating piston 26. The retraction of the blocking piston 27 can release the frontmost terminal assembly; the terminal assembly realizes vertical output through the steering groove 28; the discharge port 29 is docked with the air rail docking discharge port 35.

[0029] An installation base 38 is provided on the driving motor 31. The output end of the driving motor 31 passes through the installation base 38 and is connected to the distribution plate 33. A distribution plate mounting bracket 32 is also provided at the output end of the driving motor 31; at least one separating plate throwing port 36 is further provided on the distribution plate 33. An installation cavity 39 is provided on one surface of the installation base 38 close to the distribution plate 33. A material throwing box 37 is provided in the installation cavity 39, and the material throwing box 37 is connected to the separating plate throwing port 36.

[0030] The driving motor 31 is a high-precision driving motor to ensure the driving accuracy of the distribution plate 33; the distribution plate mounting bracket 32 is used to be mounted on a supporting chip mounter; the distribution plate 33 has no driving ability to ensure the stability of the material during driving; the material taking port 34 is the material taking position of the chip mounter; the air rail docking discharge port 35 is the docking position of the pneumatic separation guide rail 2 and the distribution plate 33. The power module terminals of the pneumatic separation guide rail 2 fall into the air rail docking discharge port 35; the power module terminals after the chip mounter fails to take the material at the material taking port will fall into the separating plate throwing port 36 to ensure that the next feeding is not stuck; the material throwing box 37 is used for collecting the waste materials of the power module terminal throwing; the installation base 38 is the mounting bracket for the driving motor 31 and the supporting equipment.

[0031] Embodiment 2 As Figures 1 - 7, A feeding method for a feeding device applied to the terminals of a power module, comprising the following steps: Step S1. Add the power module terminals 15 to the filling box 13. When the grating sensor 22 receives the light source signal, the controller controls the motor 12 of the vibration module to start. The power of the motor 12 is 15 - 25W. The power module terminals are spirally lifted by the vibration of the motor 12, automatically sorted and transported to the spiral transport track 14, and transported to the transport track through the discharge docking port 16. Step S2. Introduce compressed air into the gas input port 23, and introduce the compressed air into the transport track through the gas guiding groove 24 and the pneumatic transport groove 25. The conveying air pressure of the compressed air is 0.4 - 0.6MPa. The power module terminals are pushed forward by the compressed air. The separation piston 26 is inserted by controlling the second cylinder to block the power module terminals 15 at the lower end. Subsequently, the blocking piston 27 is inserted by controlling the first cylinder to block the second power module terminal. At the same time, the second cylinder controls the separation piston 26 to retract, realizing the release of the frontmost power module terminal 15. The switching pressures of the first cylinder and the second cylinder are both 0.6 - 0.9MPa. Step S3. Dock the discharge port 29 with the material distribution plate 33. The power module terminals are output through the discharge port 29 into the air rail docking and feeding port 35. The power module terminals that fail to be picked up by the pick-and-place device at the picking port 34 fall into the separation plate throwing port 36, and finally fall into the material throwing box 37 for waste collection.

[0032] Figure 5 is a schematic structural diagram of the power module terminal. The power module terminal 15 includes a terminal body 151. Terminal bases 152 are provided at both ends of the terminal body 151. Four welding bosses 153 are evenly arranged along the circumferential direction on the end faces of the two terminal bases 152 away from the terminal body 151. Power terminal insertion holes 154 that communicate with each other are provided on the terminal body 151 and the terminal bases 152. The welding bosses 153 are arc-shaped structures, and the outer circumference of the arc-shaped structure is consistent with the outer circumference of the terminal base 152. The four welding bosses 153 are symmetrically distributed along the center of the terminal base 152.

[0033] Figure 7 is a schematic circuit connection diagram of the feeding device for the power module terminal of the present invention. The controller can be a PLC controller. After the pick-and-place device nozzle completes one pick-up, the pick-and-place motor drive signal is fed back to the controller. After the controller receives the pick-up signal, it sends a drive command to the drive motor 31, and the material distribution plate drive completion signal is fed back to the controller; after the controller receives the material distribution plate drive completion signal, it sends drive commands to the first cylinder and the second cylinder. The blocking piston 27 closes, the separation piston 26 opens, the separation piston 26 closes, and the blocking piston 27 opens to complete one feeding; the automatic switch of the motor 12 for feeding is controlled by the signal of the grating sensor 22 provided on the pneumatic track.

[0034] The feeding device and feeding method of the power module terminal of the present invention have higher feeding stability for the power module terminal, adopt an automated structure feeding method, improve the equipment efficiency, avoid manual operation, reduce the risk of material pollution and deformation, make the feeding process more reasonable, and reduce costs and increase efficiency.

[0035] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the examples, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A feeding device for power module terminals, characterized in that, Comprising: A vibration module (1), the vibration module (1) includes a motor (12), an annular filling box (13) is arranged on the motor (12), a spiral transmission track (14) is arranged on the inner circumference of the filling box (13), and the top end of the spiral transmission track (14) extends outward in the radial plane to set a discharge docking port (16); A pneumatic separation guide rail (2), the pneumatic separation guide rail (2) includes a guide rail body, a transportation track is arranged along the length direction of the inner side wall of the guide rail body, one end of the transportation track is matched with the discharge docking port (16), a grating sensor (22) and a gas transmission component are arranged on the guide rail body on the same side of the transportation track, the transportation track and the gas transmission component are communicated with each other, a turning port is arranged at one end of the transportation track, a blocking piston (27) and a separation piston (26) are arranged in sequence at one end of the transportation track close to the turning port, and a discharge port (29) is arranged at one end of the turning port away from the transportation track; A material distribution mechanism (3), the material distribution mechanism (3) includes a driving motor (31), a material distribution disk (33) is arranged on the driving motor (31), a plurality of air rail docking discharge ports (35) are arranged at intervals along the circumferential direction on the surface of the material distribution disk (33) facing away from the driving motor (31), and the air rail docking discharge ports (35) are matched with the discharge port (29); A controller, the controller is electrically connected to the motor (12), the grating sensor (22), the driving motor (31), and the patch motor.

2. The feeding device for the power module terminal according to claim 1, wherein The vibration module (1) further includes a vibration disk mounting base (11), and the motor (12) is arranged on the vibration disk mounting base (11).

3. The feeding device for the power module terminal according to claim 1, characterized in that, The guide rail body includes two guide rail components (20), a discharge track (21) is arranged on one side of each guide rail component (20), and the two discharge tracks (21) are combined to form a transportation track, and the shape of the transportation track is matched with the shape of the power module terminal.

4. The feeding device for the power module terminal according to claim 3, wherein, The gas transmission component includes a gas input port (23), a gas guide groove (24), and a pneumatic transmission groove (25), the gas input port (23) is arranged on the side wall of the guide rail component (20), the gas guide groove (24) is arranged on the guide rail component (20) below the discharge track (21), the gas guide groove (24) extends along the length direction of the guide rail component (20), a plurality of pneumatic transmission grooves (25) are arranged at intervals between the discharge track (21) and the gas guide groove (24), and the discharge track (21) and the gas guide groove (24) are communicated through the pneumatic transmission groove (25).

5. The feeding device for the power module terminal according to claim 3, characterized in that, An arc-shaped turning groove (28) is arranged at one end of each discharge track (21), the two turning grooves (28) are combined to form a turning port, a blocking piston (27) and a separation piston (26) are arranged in sequence at the end of the discharge track (21) close to the turning groove (28), and the turning groove (28) extends to the upper side of the bottom of the guide rail body; the separation piston (26) is connected to a first cylinder, the blocking piston (27) is connected to a second cylinder, and both the first cylinder and the second cylinder are connected to the controller.

6. The feeding device for the power module terminal according to claim 5, characterized in that, The insertion end length of the separation piston (26) is less than that of the blocking piston (27).

7. The feeding device for the power module terminal according to claim 1, characterized in that An installation base (38) is provided on the driving motor (31). The output end of the driving motor (31) passes through the installation base (38) and is connected to the material distribution plate (33). A material distribution plate mounting bracket (32) is also provided at the output end of the driving motor (31).

8. The feeding device for the power module terminal according to claim 7, characterized in that, At least one separation plate throwing port (36) is further provided on the material distribution plate (33). An installation cavity (39) is provided on one surface of the installation base (38) close to the material distribution plate (33). A material throwing box (37) is provided in the installation cavity (39). The material throwing box (37) is connected to the separation plate throwing port (36).

9. A feeding method for a feeding device of a power module terminal according to any one of claims 1-8, characterized in that, It includes the following steps: Step S1. Add the power module terminal (15) to the filling box (13). When the grating sensor (22) receives the light source signal, the controller controls the motor (12) of the vibration module to start. The power module terminal (15) spirally rises through the vibration of the motor (12) to the spiral transmission track (14) for automatic sorting and transmission, and is transported to the transport track through the discharge interface (16). Step S2. Introduce compressed air into the gas input port (23), and introduce the compressed air into the transport track through the gas guiding groove (24) and the pneumatic transmission groove (25). Push the power module terminal (15) forward through the compressed air. Control the separation piston (26) to insert to fix the lower power module terminal (15), and then control the blocking piston (27) to connect through the second cylinder to release the foremost power module terminal (15). Step S3. Dock the discharge port (29) with the material distribution plate (33). The power module terminal (15) is output to the air rail docking discharge port (35) through the discharge port (29). The power module terminal (15) that fails to be picked up by the chip mounter at the pick-up port (34) drops into the separation plate throwing port (36), and finally drops into the material throwing box (37) for waste collection.

10. The feeding method according to claim 9, characterized in that, In step S1, the power of the motor (12) is 15 - 25 W; in step S2, the compressed air conveying air pressure is 0.4 - 0.6 MPa, and the switching pressures of the first cylinder and the second cylinder are both 0.6 - 0.9 MPa.

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