A secondary welding fixture separation device for automotive-grade IGBT modules

Abstract

The present invention discloses a secondary soldering jig separation device for automotive-grade IGBT modules, belonging to the field of power semiconductor manufacturing technology. The device comprises a pin base separation mechanism 1, a pin base flipping mechanism 16, a first carrier conveyor track 2, a DBC positioning jig separation mechanism 3, a DBC positioning jig separation transfer platform 14, a second carrier conveyor track 4, a DBC / hot plate transfer robot 5, a DBC transfer mechanism 8, and a DBC detection mechanism 6. The jig separation process requires no human intervention and is fully automated, ensuring product consistency and avoiding product contamination caused by manual contact, which could affect final product quality. The separated jigs are sequentially placed on a dedicated carrier and can be returned to the upstream process for recycling.

Description

Technical Field

[0001] The present invention belongs to the technical field of power semiconductor manufacturing, and in particular relates to a secondary welding jig separation device for an automotive-grade IGBT module. Background Art

[0002] IGBT, or power semiconductor device, is widely used in the defense industry and all aspects of the national economy.

[0003] IGBT modules play a vital role in electric vehicles and are core components for electric vehicles and charging stations. Packaging is a crucial step in IGBT module production. Due to the complexity of new energy vehicle driving scenarios and the absolute need for driving safety, automotive-grade IGBTs have stringent requirements for operating temperature range, heat dissipation, and vibration resistance. Therefore, improving package reliability is a crucial task in IGBT packaging.

[0004] Currently, the most widely used module in automobiles is packaged in the form of a pin-fin heat sink. This packaging form requires more jigs to assist in the secondary welding process. After welding is completed, the jigs need to be removed to facilitate the subsequent manufacturing process.

[0005] Currently, fixture removal is mainly done manually or only some fixtures can be removed automatically, resulting in low production efficiency. Product quality depends on the proficiency of the personnel, and cleanliness cannot be guaranteed during manual operations, which greatly affects the consistency and reliability of the final product. Summary of the Invention

[0006] The purpose of this invention is to provide a fully automated method for removing welding jigs. This method sequentially separates the pin holder, DBC positioning jig, and hot plate used in the DBC after secondary welding. After removal, the jigs are placed on a dedicated carrier tray and returned to the upstream process for further recycling. The removal of all auxiliary jigs is fully automated, requiring no human intervention, ensuring consistent product manufacturing. The entire process eliminates manual contact with the product, thus preventing contamination from manual labor.

[0007] The present invention is achieved through the following technical solutions:

[0008] A secondary welding jig separation device for an automotive-grade IGBT module includes a pin base separation mechanism 1, a pin base flipping mechanism 16, a first carrier conveying track 2, a DBC positioning jig separation mechanism 3, a DBC positioning jig separation transfer table 14, a second carrier conveying track 4, a DBC / hot plate transfer robot 5, a DBC transfer mechanism 8, and a DBC detection mechanism 6.

[0009] The pin base separation mechanism 1 includes a SCARA four-axis robot 101, an electric gripper 102, and a pin base finger 103;

[0010] The electric gripper 102 is disposed at the end of the SCARA four-axis robot 101. The electric gripper 102 is equipped with two pin base gripping fingers 103, each equipped with two locating pins. When the electric gripper is closed, the locating pins on the gripping fingers engage with the locating holes on the pin base to securely grip the pin base.

[0011] The pin base flip mechanism 16 includes a lifting servo motor 1601, a flip cylinder 1602, a pin base clamp 1603, a placement table 1604, a guide rod 1605, a ball screw 1606, a screw nut 1607, and a coupling 1608;

[0012] The lifting servo motor 1601 is connected to the lower end of the ball screw assembly consisting of the ball screw 1606 and the screw nut 1607 through a coupling 1608. The upper end of the ball screw assembly is supported under the placement table 1604. The pin base clamp 1603 is arranged around the placement table 1604. The flip cylinder 1602 is connected to the pin base clamp 1603.

[0013] The guide rod 1605 and the ball screw 1606 are arranged parallel to each other and are arranged below the placement table 1604;

[0014] The first carrier transport track 2 includes a first slide rail 201, a first slider 202, a conveyor belt 203, a guide bar 204, a blocking cylinder 205, a positioning plate 206, a positioning pin 207, a second slider 208, a second slide rail 209, a drive motor 210, a ball screw 211, a handwheel 212, and a lifting cylinder 213;

[0015] The conveyor belt 203 has two parts, one of which is mounted on a fixed base, and the other is mounted on a sliding base consisting of a first slide rail 201, a first slider 202, a second slider 208, and a second slide rail 209. The handwheel 212 is connected to a ball screw 211, which is connected to the sliding belt base via a screw nut. By turning the handwheel 212, the spacing between the two belts can be adjusted to accommodate carriers of different widths. The positioning plate 206 is disposed between the two conveyor belts 203. The lifting cylinder 213 is disposed below the positioning plate 206. When the lifting cylinder 213 lifts the positioning plate 206, the positioning pin 207 on the positioning plate 206 engages with the pin hole on the carrier to position the carrier. The drive motor 210 drives the conveyor belt 203 to transport the carrier to each corresponding workstation.

[0016] Pin base separation and flipping working process:

[0017] The SCARA four-axis robot 101 first takes the DBC fixture out of the welding carrier of the previous process and places it on the carrier conveyor track 1. The piston of the hot plate fixed lifting cylinder 213 extends to fix the hot plate. Then the robot gripper grabs the pin base and places it on the pin base flipping mechanism 16.

[0018] The pin base flipping mechanism 16 includes a placement table 1604 and a pin base flipping clamp 1603. The placement table's up and down movement is driven by a servo motor 1601, which is connected to the placement table 1604 via a coupling 1609 and a ball screw 1606. The flipping clamp 1603 is driven by a rotary flip cylinder 1602, which rotates the pneumatic clamp via a synchronous belt. After the robot 101 places the pin base on the flip placement table 1604, the pneumatic clamp 1603 closes and clamps the pin base. The placement table descends, and then the flip cylinder rotates 180°, causing the placement table 1604 to rise, supporting the pin base. The pneumatic clamp 1603 releases, completing the flipping action. Finally, the robot 101 picks up the pin base 18 and places it on the pin base carrier 17.

[0019] After the pin base is separated, the DBC jig is transported along the first conveying track 2 to the DBC positioning jig separation station, the lifting cylinder 213 is raised, the positioning pins 207 on the positioning plate 206 cooperate with the positioning holes on the hot plate to determine the position of the jig, and then wait for the next process.

[0020] The DBC positioning fixture separation mechanism 3 includes a DBC positioning fixture nozzle 301, a positioning fixture nozzle three-axis slide 302, a hot plate clamp three-axis slide 303, a hot plate clamp 304, a bracket 305;

[0021] The positioning fixture nozzle three-axis slide 302 and the hot plate clamp three-axis slide 303 share the same X-axis and Y-axis linear modules and are supported on a bracket 305. The DBC positioning fixture nozzle 301 is set on the positioning fixture nozzle three-axis slide 302, and the hot plate clamp 304 is set on the hot plate clamp three-axis slide 303.

[0022] The DBC positioning fixture nozzle 301 includes two suction heads 3011, each of which includes an internal negative pressure channel 30111, four suction holes 30112 are symmetrically opened on the surface of the suction head, and positioning pins 30113 are set at the centers of the four suction holes 30112;

[0023] The positioning fixture transfer mechanism 14 includes a jacking servo motor 1401, a coupling 1402, a ball screw 1403, a pressure sensor 1404, a pressure block 1405, a transfer fixture 1406, an ejector sleeve 14061, an ejector 14062, a buffer spring 14063, a linear bearing 1407, a guide rod 1408;

[0024] The lifting servo motor 1401 forms a lifting mechanism through a coupling 1408 and a ball screw assembly 1403. The transfer fixture 1406 is provided with a plurality of ejector sleeves 14061, ejector rods 14062 and buffer springs 14063. The ejector sleeves 14061, ejector rods 14062 and buffer springs 14063 are supported below the positioning pins of the DBC positioning fixture 13 through the through holes of the hot plate 10.

[0025] The lifting mechanism composed of the lifting servo motor 1401 through the coupling 1408 and the ball screw assembly 1403 has four groups, which are supported at the four corners of the DBC positioning fixture 13;

[0026] The lifting servo motor 1401 is provided with a pressure sensor 1404 between the lifting mechanism and the ejector sleeve 14061, the ejector 14062 and the buffer spring 14063 consisting of a ball screw assembly 1403 through a coupling 1408;

[0027] The second carrier conveyor track includes a ball screw 401, a conveyor belt 402, a carrier block 403, a positioning plate 404, a hot plate fixing cylinder 405, a guide bar 406, a slider 407, a guide rail 408, a drive motor 409, a handwheel 410, a jacking positioning cylinder 411;

[0028] The drive motor 408 is connected to the conveyor belt 402 through a transmission system;

[0029] The conveyor belts 402 have two ends, one supported on a fixed support and the other supported on a sliding support consisting of a slider 407 and a guide rail 408. A handwheel 410 is connected to the ball screw 401. The screw nut of the ball screw 401 is connected to the conveyor belt sliding support. Turning the handwheel 410 can adjust the distance between the two conveyor belts 402.

[0030] The jacking positioning cylinder 411 is provided below the positioning plate 404;

[0031] The carrier block 403 is provided between the two conveyor belts to position the carrier;

[0032] There are two hot plate fixing cylinders 405, which are respectively arranged on both sides of the two conveyor belts;

[0033] Positioning fixture positioning and transfer work process:

[0034] The hot plate clamp 304 clamps the hot plate delivered from the first conveyor track 2 and places it on the transfer table 14. After the DBC positioning jig 12 is separated from the transfer table 14, the hot plate is picked up and placed back on the conveyor track 1. The DBC positioning jig nozzle 301 is responsible for sucking the positioning jig 12 and placing it on the DBC positioning jig carrier 13.

[0035] After the hot plate 10 carrying the DBC is placed in the transfer positioning jig 1406, the rotating cylinder drives the pressure head 1405 to press down to fix the hot plate 10, and then the servo motor 1401 drives the lifting mechanism to rise, lifting the push rod 14062 upward, thereby separating the DBC positioning jig 12 from the hot plate 10. After the jig is separated, the DBC positioning jig 12 is sucked up by the positioning jig nozzle 301 and placed in the positioning jig suction cup.

[0036] The transfer mechanism 8 includes a transfer linear module 801, DBC detection fixture 802, a traverse cylinder 803, a servo drive motor 804;

[0037] The servo drive motor 804 is connected to the transfer linear module 801, the traverse cylinder 803 is provided above the transfer linear module 801, the DBC detection fixture 802 is provided above the traverse cylinder 803;

[0038] Positioning fixture transfer and inspection work process:

[0039] After the DBC positioning jig is separated, it is transferred to the hot plate separation station on conveyor track 2. Positioning cylinder 410 is lifted, inserting the positioning pins on positioning plate 404 into the positioning holes of the hot plate, securing the hot plate. Fixing cylinder 405 rotates to press the hot plate tightly. Transfer robot 5 grabs the DBC and places it into inspection jig 802 below inspection mechanism 6. Inspection jig 802 is mounted on linear module 801 driven by servo motor 804. A 3D inspection camera 7 is mounted above inspection jig 802 to check the welding quality of the DBC pins.

[0040] The DBC transfer mechanism 8 consists of a SCARA robot 5 and a gripper mounted on it. After the hot plate arrives at the separation station and is secured, the robot 5 places the DBC into the inspection mechanism's jig 802. 3D inspection camera 7 then inspects the plate. Passing products are placed on the DBC carrier, while unqualified ones are picked up and placed on the DBC defective product conveyor track 5. The robot 5 then grabs the hot plate and places it on the hot plate carrier.

[0041] This completes a working process.

[0042] It also includes a DBC defective product conveying track 5, a hot plate carrier 9, a DBC positioning fixture carrier 12, and a pin base carrier 17. The DBC defective product conveying track 5, the hot plate carrier 9, the DBC positioning fixture carrier 12, and the pin base carrier 17 are arranged nearby according to the distribution of each process station.

[0043] The present invention has the following beneficial effects:

[0044] 1. The fixture separation process is fully automatic and does not require manual intervention, which can ensure product consistency and avoid product contamination caused by manual contact with the product, thereby affecting the final product quality.

[0045] 2. The separated fixtures are placed in a dedicated carrier in sequence and can be sent back to the previous process for recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0047] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0048] Figure 2 It is a partial enlarged schematic diagram of the pin base separation mechanism 1, the first carrier conveying track 2, the pin base flipping mechanism 16, and the DBC positioning jig separation mechanism 3 of the present invention;

[0049] Figure 3 The present invention is a DBC / hot plate transfer mechanism 6, DBC detection mechanism 7 partially enlarged schematic diagram;

[0050] Figure 4 This is a schematic diagram of the pin base separation mechanism 1 of the present invention;

[0051] Figure 5 This is a schematic diagram of the pin base flip mechanism 16 of the present invention.

[0052] Figure 6 Is a schematic diagram of the first conveyor track 2 of the present invention;

[0053] Figure 7 yes Figure 6 Side view;

[0054] Figure 8 This is a schematic diagram of the DBC positioning fixture separation mechanism 3 of the present invention

[0055] Figure 9 Schematic diagram of the structure of the positioning fixture nozzle 301 of the present invention;

[0056] Figure 10 yes Figure 7 The main view;

[0057] Figure 11 yes Figure 7 Bottom view of

[0058] Figure 12 Is a schematic diagram of the present invention positioning jig transfer mechanism 14;

[0059] Figure 13 It is a schematic diagram of the positioning fixture 1406 of the transfer mechanism of the positioning fixture;

[0060] Figure 14 yes Figure 13 A top view of

[0061] Figure 15 yes Figure 14 BB cross-section diagram;

[0062] Figure 16 Is a schematic diagram of the second conveyor track 4 of the present invention;

[0063] Figure 17 Figure 16 Side view;

[0064] Figure 18 Is a schematic diagram of the transfer mechanism 8 of the present invention;

[0065] In the figure: 1-pin base transfer robot, 2-first carrier conveyor track, 3-DBC positioning fixture separation three-axis robot, 4-second carrier conveyor track, 5-DBC defective product conveyor track, 6-DBC / hot plate robot, 7-3D inspection camera, 8-DBC transfer mechanism, 9-hot plate carrier, 10-hot plate, 11-DBC hot plate separation, 12-DBC positioning fixture carrier, 13-DBC positioning fixture, 14-positioning fixture transfer table, 16-pin base flipping mechanism, 17-pin base carrier, 18-pin base;

[0066] 101-SCARA four-axis robot, 102-electric gripper, 103-pin base gripper;

[0067] 201-first slide rail, 202-first slider, 203-transmission belt, 204-guide bar, 205-blocking cylinder, 206-positioning plate, 207-positioning pin, 208-second slider, 209-second slide rail, 210-drive motor, 211-ball screw, 212-handwheel;

[0068] 301-DBC positioning fixture nozzle, 3011-suction head, 30111-internal negative pressure channel, 30112-suction hole, 30113-locating pin, 302-positioning fixture nozzle three-axis slide, 303-hot plate clamp three-axis slide, 304-hot plate clamp, 305-bracket;

[0069] 1601-lifting servo motor, 1602-reversing cylinder, 1603-pin base clamp, 1604-placement table, 1605-guide rod, 1606-ball screw, 1607-screw nut, 1608-coupling;

[0070] 1401-lifting servo motor, 1402-guide rod, 1403-ball screw, 1404-pressure sensor, 1405-pressure block, 1406-transfer fixture, 14061-throwing sleeve, 14062-throwing rod, 14063-buffer spring, 1407-linear bearing, 1408-coupling;

[0071] 401-ball screw, 402-transmission belt, 403-carrier plate stop, 404-positioning plate, 405-hot plate fixing cylinder, 406-guide bar, 407-slider, 408-guide rail, 409-drive motor, 410-handwheel, 411-lifting positioning cylinder;

[0072] 801-Transfer linear module, 802-DBC detection fixture, 803-Transverse cylinder, 804-Servo drive motor;

[0073] The present invention is a secondary welding jig separation device for automotive-grade IGBT modules, comprising a pin base separation mechanism 1, a pin base flipping mechanism 16, a first carrier conveying track 2, a DBC positioning jig separation mechanism 3, a DBC positioning jig separation transfer table 14, a second carrier conveying track 4, a DBC / hot plate transfer robot 5, a DBC transfer mechanism 8, and a DBC detection mechanism 6.

[0074] The pin base separation mechanism 1 includes a SCARA four-axis robot 101, an electric gripper 102, and a pin base finger 103;

[0075] The electric gripper 102 is disposed at the end of the SCARA four-axis robot 101. It is equipped with two pin base gripping fingers 103, each equipped with two locating pins. When the electric gripper is closed, the locating pins on the gripping fingers engage with the locating holes on the pin base to securely grip the pin base.

[0076] The pin base flip mechanism 16 includes a lifting servo motor 1601, a flip cylinder 1602, a pin base clamp 1603, a placement table 1604, a guide rod 1605, a ball screw 1606, a screw nut 1607, and a coupling 1608;

[0077] The lifting servo motor 1601 is connected to the lower end of the ball screw assembly consisting of the ball screw 1606 and the screw nut 1607 through a coupling 1608. The upper end of the ball screw assembly is supported under the placement table 1604. The pin base clamp 1603 is arranged around the placement table 1604. The flip cylinder 1602 is connected to the pin base clamp 1603.

[0078] The guide rod 1605 and the ball screw 1606 are arranged parallel to each other and are arranged below the placement table 1604;

[0079] The first carrier transport track 2 includes a first slide rail 201, a first slider 202, a conveyor belt 203, a guide bar 204, a blocking cylinder 205, a positioning plate 206, a positioning pin 207, a second slider 208, a second slide rail 209, a drive motor 210, a ball screw 211, a handwheel 212, and a lifting cylinder 213;

[0080] The conveyor belt 203 has two parts, one of which is mounted on a fixed base, and the other is mounted on a sliding base consisting of a first slide rail 201, a first slider 202, a second slider 208, and a second slide rail 209. The handwheel 212 is connected to a ball screw 211, which is connected to the sliding belt base via a screw nut. By turning the handwheel 212, the spacing between the two belts can be adjusted to accommodate carriers of different widths. The positioning plate 206 is disposed between the two conveyor belts 203. The lifting cylinder 213 is disposed below the positioning plate 206. When the lifting cylinder 213 lifts the positioning plate 206, the positioning pin 207 on the positioning plate 206 engages with the pin hole on the carrier to position the carrier. The drive motor 210 drives the conveyor belt 203 to transport the carrier to each corresponding workstation.

[0081] Pin base separation and flipping working process:

[0082] The pin base separation mechanism consists of a four-axis robot 101 and a gripper mounted on it. The four-axis robot is equipped with an electric gripper 102, which is equipped with two gripping fingers 103. Each gripper finger is equipped with two positioning pins. When the electric gripper is closed, the positioning pins engage with the positioning holes in the pin base, firmly grasping the pin base. To separate the pin base, the SCARA four-axis robot 101 first removes the DBC fixture from the welding carrier and places it on the carrier transfer track 1. The piston of the hot plate fixing cylinder 213 extends to secure the hot plate. The robot gripper then grasps the pin base and places it on the pin base flip mechanism.

[0083] The pin base flipping mechanism 16 includes a placement table 1604 and a pin base flipping clamp 1603. The placement table's up and down movement is driven by a servo motor 1601, which is connected to the placement table 1604 via a coupling 1609 and a ball screw 1606. The flipping clamp 1603 is driven by a rotary flip cylinder 1602, which rotates the pneumatic clamp via a synchronous belt. After the robot 101 places the pin base on the flip placement table 1604, the pneumatic clamp closes and clamps the pin base. The placement table descends, and then the flip cylinder rotates 180°, causing the placement table to rise, supporting the pin base. The pneumatic clamp releases, completing the flipping action. Finally, the robot 101 picks up the pin base and places it on the pin base carrier 17.

[0084] After the pin base 18 is separated, the DBC jig is transported along the first conveying track 2 to the DBC positioning jig separation station, the lifting cylinder 213 is raised, and the positioning pins 207 on the positioning plate 206 cooperate with the positioning holes on the hot plate to determine the position of the jig.

[0085] The DBC positioning fixture separation mechanism 3 includes a DBC positioning fixture nozzle 301, a positioning fixture nozzle three-axis slide 302, a hot plate clamp three-axis slide 303, a hot plate clamp 304, a bracket 305;

[0086] The positioning fixture nozzle three-axis slide 302 and the hot plate clamp three-axis slide 303 share the same X-axis and Y-axis linear modules and are supported on a bracket 305. The DBC positioning fixture nozzle 301 is set on the positioning fixture nozzle three-axis slide 302, and the hot plate clamp 304 is set on the hot plate clamp three-axis slide 303.

[0087] The DBC positioning fixture nozzle 301 includes two suction heads 3011, each of which includes an internal negative pressure channel 30111, four suction holes 30112 are symmetrically opened on the surface of the suction head, and positioning pins 30113 are set at the centers of the four suction holes 30112;

[0088] The positioning fixture transfer mechanism 14 includes a jacking servo motor 1401, a coupling 1402, a ball screw 1403, a pressure sensor 1404, a pressure block 1405, a transfer fixture 1406, an ejector sleeve 14061, an ejector 14062, a buffer spring 14063, a linear bearing 1407, a guide rod 1408;

[0089] The lifting servo motor 1401 forms a lifting mechanism through a coupling 1408 and a ball screw assembly 1403. The transfer fixture 1406 is provided with a plurality of ejector sleeves 14061, ejector rods 14062 and buffer springs 14063. The ejector sleeves 14061, ejector rods 14062 and buffer springs 14063 are supported below the positioning pins of the DBC positioning fixture 12 by passing through the through holes of the hot plate 10.

[0090] The lifting mechanism composed of the lifting servo motor 1401 through the coupling 1408 and the ball screw assembly 1403 has four groups, which are supported at the four corners of the DBC positioning fixture 12;

[0091] The lifting servo motor 1401 is provided with a pressure sensor 1404 between the lifting mechanism and the ejector sleeve 14061, the ejector 14062 and the buffer spring 14063 consisting of a ball screw assembly 1403 through a coupling 1408;

[0092] The second carrier conveyor track includes a ball screw 401, a conveyor belt 402, a carrier block 403, a positioning plate 404, a hot plate fixing cylinder 405, a guide bar 406, a slider 407, a guide rail 408, a drive motor 409, a handwheel 410, a jacking positioning cylinder 411;

[0093] The drive motor 408 is connected to the conveyor belt 402 through a transmission system;

[0094] The conveyor belts 402 have two ends, one supported on a fixed support and the other supported on a sliding support consisting of a slider 407 and a guide rail 408. A handwheel 410 is connected to the ball screw 401. The screw nut of the ball screw 401 is connected to the conveyor belt sliding support. Turning the handwheel 410 can adjust the distance between the two conveyor belts 402.

[0095] The jacking positioning cylinder 411 is provided below the positioning plate 404;

[0096] The carrier block 403 is provided between the two conveyor belts to position the carrier;

[0097] There are two hot plate fixing cylinders 405, which are respectively arranged on both sides of the two conveyor belts;

[0098] Positioning fixture positioning and transfer work process:

[0099] The three-axis slide 302 for the positioning jig nozzle and the three-axis slide 303 for the hot plate clamp share the same X- and Y-axis slides, on which the DBC positioning jig nozzle 301 and hot plate clamp 304 are mounted, respectively. The hot plate clamp 304 is responsible for placing the hot plate onto the transfer table 14. After the DBC jig is separated, it is picked up and placed back onto the conveyor track 1. The DBC positioning jig nozzle 301 is responsible for picking up the jig and placing it on the DBC positioning jig carrier.

[0100] A specialized transfer positioning jig 1406 is placed on the transfer table 14. Eight ejector pin assemblies are mounted at the base of the jig. Each ejector pin assembly consists of a sleeve 14061, an ejector pin 14062, and a spring 14063. The ejector pins pass through holes in the hot plate 10 and align with the positioning pins on the DBC positioning jig 12. Four vertical motion mechanisms driven by servo motors 1401 are mounted below the jig. Pressure sensors 1404 are installed to detect pressure during lifting. After the hot plate 10 carrying the DBC is placed in the jig 1406, the rotating cylinder drives the pressure head 1405 to press down to fix the hot plate 10, and then the servo motor 1401 drives the lifting mechanism to rise, lifting the push rod 14062 upward, thereby separating the DBC positioning jig 12 from the hot plate 10. After the positioning jig 12 is separated, the DBC positioning jig 12 is sucked up by the positioning jig suction nozzle 301 and placed in the positioning jig carrier 13.

[0101] The transfer mechanism 8 includes a transfer linear module 801, DBC detection fixture 802, a traverse cylinder 803, a servo drive motor 804;

[0102] The servo drive motor 804 is connected to the transfer linear module 801, the traverse cylinder 803 is provided above the transfer linear module 801, the DBC detection fixture 802 is provided above the traverse cylinder 803;

[0103] Positioning fixture transfer and inspection work process:

[0104] After the DBC positioning jig is separated, it is transferred to the hot plate separation station on conveyor track 2. Positioning cylinder 410 is lifted, inserting the positioning pins on positioning plate 404 into the positioning holes on the hot plate, securing the hot plate. Fixing cylinder 405 rotates to press the hot plate tightly. Transfer robot 5 grabs the DBC and places it into inspection jig 802 below inspection mechanism 6. The inspection jig is mounted on a linear module driven by a servo motor. A 3D inspection camera 7 is mounted above inspection jig 802 to check the welding quality of the DBC pins.

[0105] The DBC transfer mechanism 8 consists of a SCARA robot 5 and a gripper mounted on it. After the hot plate arrives at the separation station and is secured, the robot places the DBC into the inspection mechanism's jig 802. 3D inspection camera 7 then inspects the plate. Passing products are placed on the DBC carrier, while unqualified ones are picked up and placed on the DBC defective product conveyor track 5. The robot then grabs the hot plate and places it on the hot plate carrier.

[0106] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A secondary welding fixture separation device for automotive-grade IGBT modules, characterized in that , comprising a pin base separation mechanism (1), a pin base flipping mechanism (16), a first carrier conveying track (2), a DBC positioning fixture separation mechanism (3), a DBC positioning fixture separation transfer table (14), a second carrier conveying track (4), a DBC / hot plate transfer manipulator (6), a DBC transfer mechanism (8), and a DBC detection mechanism (7); The pin base separation mechanism (1) comprises a SCARA four-axis robot (101), an electric gripper (102), and a pin base gripper finger (103); The electric gripper (102) is arranged at the end of the SCARA four-axis robot (101), and two pin base gripping fingers (103) are installed on the electric gripper (102), and each pin base gripping finger is equipped with two positioning pins; The pin base flipping mechanism (16) includes a first lifting servo motor (1601), a flip cylinder (1602), a pin base clamp (1603), a placement table (1604), a first guide rod (1605), a first ball screw (1606), a screw nut (1607), and a first coupling (1608); The first lifting servo motor (1601) is connected to the lower end of the ball screw assembly consisting of the first ball screw (1606) and the screw nut (1607) through a first coupling (1608); the upper end of the ball screw assembly is supported below the placement table (1604); the pin base clamp (1603) is arranged around the placement table (1604); and the flip cylinder (1602) is connected to the pin base clamp (1603); The first guide rod (1605) and the first ball screw (1606) are arranged parallel to each other below the placement platform (1604); The first carrier conveying track (2) comprises a first slide rail (201), a first slider (202), a first conveying belt (203), a guide bar (204), a blocking cylinder (205), a second positioning plate (206), a first positioning pin (207), a second slider (208), a second slide rail (209), a second driving motor (210), a second ball screw (211), a second hand wheel (212), and a lifting cylinder (213); The lifting cylinder (213) is arranged below the second positioning plate (206); when the lifting cylinder (213) lifts the second positioning plate (206), the first positioning pin (207) on the second positioning plate (206) cooperates with the pin hole on the carrier plate to position the carrier plate; The DBC positioning fixture separation mechanism (3) includes a DBC positioning fixture nozzle (301), a positioning fixture nozzle three-axis slide (302), a hot plate clamp three-axis slide (303), a hot plate clamp (304), and a bracket (305); The positioning jig nozzle three-axis slide (302) and the hot plate clamp three-axis slide (303) share the same X-axis and Y-axis linear modules, the X-axis and Y-axis linear modules are supported on a bracket (305), the DBC positioning jig nozzle (301) is arranged on the positioning jig nozzle three-axis slide (302), and the hot plate clamp (304) is arranged on the hot plate clamp three-axis slide (303); The DBC positioning fixture nozzle (301) includes two suction heads (3011), each of which includes an internal negative pressure channel (30111), four suction holes (30112) are symmetrically opened on the surface of the suction head, and second positioning pins (30113) are set at the centers of the four suction holes (30112); The DBC positioning fixture separation turntable (14) includes a second lifting servo motor (1401), a second coupling (1402), a third ball screw (1403), a pressure sensor (1404), a pressure block (1405), a transfer fixture (1406), a push rod sleeve (14061), a push rod (14062), a buffer spring (14063), a linear bearing (1407), and a second guide rod (1408); The second lifting servo motor (1401), the second coupling (1402) and the third ball screw (1403) form a lifting mechanism, and a plurality of push rod assemblies consisting of push rod sleeves (14061), push rods (14062) and buffer springs (14063) are provided on the transfer fixture (1406), and the push rod assemblies pass through the through holes of the hot plate (10) and are supported under the positioning pins of the DBC positioning fixture carrier (12); The jacking mechanism has four groups, which are respectively supported at the four corners of the DBC positioning fixture (13); A pressure sensor (1404) is provided between the lifting mechanism and the ejector assembly; The second carrier conveying track includes a fourth ball screw (401), a second conveying belt (402), a carrier block (403), a first positioning plate (404), a hot plate fixing cylinder (405), a first guide bar (406), a slider (407), a guide rail (408), a first drive motor (409), a first hand wheel (410), and a lifting positioning cylinder (411); The first drive motor (409) is connected to the second conveyor belt (402) through a transmission system; The lifting and positioning cylinder (411) is arranged below the first positioning plate (404); The carrier plate stopper (403) is provided between the two second conveyor belts (402) to position the carrier plate; There are two hot plate fixing cylinders (405), which are respectively arranged on both sides of the two second conveyor belts (402); The DBC transfer mechanism (8) includes a transfer linear module (801), a DBC detection fixture (802), a traverse cylinder (803), and a servo drive motor (804); The servo drive motor (804) is connected to the transfer linear module (801), the transverse cylinder (803) is arranged on the transfer linear module (801), and the DBC detection fixture (802) is arranged on the transverse cylinder (803).

2. The automotive-grade IGBT module secondary welding jig separation device according to claim 1 is characterized in that , further comprising a DBC defective product conveying track (5), a hot plate carrier (9), a DBC positioning fixture carrier (12), and a pin base carrier (17), wherein the DBC defective product conveying track (5), the hot plate carrier (9), the DBC positioning fixture carrier (12), and the pin base carrier (17) are arranged nearby according to the distribution of the workstations of each process.

3. The automotive-grade IGBT module secondary welding jig separation device according to claim 1, characterized in that: The first transmission belt (203) has two, one is mounted on a fixed base, and the other is mounted on a sliding base composed of a first slide rail (201) and a first slider (202) and a second slider (208) and a second slide rail (209); the second hand wheel (212) is connected to a second ball screw (211); the second ball screw (211) is connected to the sliding base via a screw nut; the second positioning plate (206) is arranged between the two first transmission belts (203); the second drive motor (210) drives the first transmission belt (203); the second transmission belt (402) has two, one is supported on a fixed support, and the other is supported on a sliding support composed of a slider (407) and a guide rail (408); the first hand wheel (410) is connected to a fourth ball screw (401); the screw nut of the fourth ball screw (401) is connected to the sliding support of the second transmission belt (402).

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