Chip angle correction and film expansion device

Abstract

The present invention discloses a chip angle correction and film expansion device, comprising a support seat, a ring clamp, a ring expansion base, a film expansion fixing seat, a film expansion drive mechanism and an angle correction mechanism, wherein the angle correction mechanism comprises a bearing support assembly and a calibration assembly arranged on the support seat, wherein the calibration assembly comprises a stepper motor, a screw module, a calibration screw base and a calibration shaft slide, wherein the stepper motor is used to drive the screw of the screw module to rotate, wherein the calibration shaft slide is fixedly connected to the nut of the screw module, and the calibration shaft slide is slidably connected to the calibration screw base, wherein the calibration shaft slide is provided with a U-shaped slide, wherein the ring expansion base is provided with a cam follower, wherein the cam follower is connected to the U-shaped slide; when the calibration shaft slide moves, the cam follower moves in the U-shaped slide and is used to drive the ring expansion base to rotate. The chip angle correction and film expansion device of the present invention can quickly correct the angle of the chip with high correction accuracy.

Description

Technical Field

[0001] The present invention relates to the field of patch technology, and in particular to a chip angle correction and film expansion device. Background Art

[0002] An IGBT chip is an insulated gate bipolar transistor (IGBT), a fully controlled, voltage-driven power semiconductor device composed of a bipolar transistor (BBT) and a MOS (insulated gate field-effect transistor). It combines the advantages of a MOSFET's high input impedance and a GTR's low on-state voltage drop. While a GTR offers low saturation voltage drop and high current density, it also provides high drive current. A MOSFET offers low drive power and fast switching speeds, but also high on-state voltage drop and low current density. Combining the advantages of both devices, IGBT chips offer low drive power and low saturation voltage drop, making them ideal for applications in DC voltage conversion systems of 600V and above, such as AC motors, inverters, switching power supplies, lighting circuits, and traction drives. IGBT chips are core components for energy conversion and transmission, commonly known as the "CPU" of power electronics. They are widely used in rail transit, smart grids, aerospace, electric vehicles, and new energy equipment.

[0003] When soldering and installing IGBT chips, it's often necessary to ensure the correct chip position. This requires correcting the chip's expansion from the blue film. To ensure soldering accuracy, the chip needs to be quickly corrected. Currently, chip angle correction primarily uses a motor as a drive, which rotates an expansion ring via a belt drive to correct the chip's angle. However, this correction method is not very accurate and the expansion ring is prone to getting stuck during rotation. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a chip angle correction and film expansion device, which can quickly correct the angle of the chip with high correction accuracy, and also avoids the expansion ring from getting stuck when rotating.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] The chip angle correction and film expansion device includes a support seat, a ring clamp, a ring expansion base, a film expansion fixing seat, a film expansion driving mechanism and an angle correction mechanism. The ring clamp is sleeved on the outer periphery of the film expansion fixing seat, and the film expansion fixing seat is fixedly connected to the ring expansion base. The film expansion driving mechanism is installed on the support seat and is used to drive the ring clamp to move closer to or away from the ring expansion base. The angle correction mechanism includes a bearing support assembly and a calibration assembly arranged on the support seat. The bearing support assembly includes a plurality of thrust deep groove ball bearings evenly distributed in a ring shape, and the outer peripheral surfaces of the plurality of thrust deep groove ball bearings are all provided with V-shaped grooves. The side of the ring expansion base is provided with a plurality of annular ridges, and the plurality of annular ridges are all centered on the center of the ring expansion base. The center, and the longitudinal cross-section of the annular ridge is V-shaped, multiple annular ridges correspond one to one with multiple V-shaped grooves, and the annular ridges are slidably connected in the V-shaped groove; the calibration component includes a stepper motor, a screw module, a calibration screw base and a calibration axis slide, the stepper motor is used to drive the screw of the screw module to rotate, the calibration axis slide is fixedly connected to the nut of the screw module, and the calibration axis slide is slidably connected to the calibration screw base, the calibration axis slide is provided with a U-shaped groove, and the ring expansion base is provided with a cam follower, and the cam follower is connected to the U-shaped groove; when the calibration axis slide moves, the cam follower moves in the U-shaped groove and is used to drive the ring expansion base to rotate.

[0007] As a further improvement of the above technical solution, the number of the thrust deep groove ball bearings is four, wherein the two thrust deep groove ball bearings close to the calibration axis slide are connected to the support seat through a fixed rotating shaft, and the other two thrust deep groove ball bearings are connected to the support seat through a biased rotating shaft.

[0008] As a further improvement of the above technical solution, the angle correction mechanism also includes a calibration limit member, which includes a calibration limit block arranged on the support seat and a limit bolt arranged on the expansion ring base. When the expansion ring base rotates, the limit bolt abuts against the calibration limit block to form a limit.

[0009] As a further improvement of the above technical solution, a slot-type photoelectric sensor is provided on the support seat, and a calibration axis light shielding plate used in conjunction with the slot-type photoelectric sensor is provided on the calibration axis slide, and the calibration axis light shielding plate passes through the slot-type photoelectric sensor when moving.

[0010] As a further improvement of the above technical solution, the ring clamp includes a lower pressure ring piece and an upper pressure ring piece, the upper pressure ring piece is arranged on the top of the lower pressure ring piece through a number of equal-height columns, and an accommodating space is formed between the upper pressure ring piece and the lower pressure ring piece, and the accommodating space is used to place the iron ring, the top of the lower pressure ring piece is provided with a first through hole, and the top of the upper pressure ring piece is provided with a second through hole, the first through hole and the second through hole are coaxially arranged and form the center hole of the ring clamp, and the blue film for placing the chip on the iron ring is located at the center hole.

[0011] As a further improvement of the above technical solution, a guide strip is respectively provided on the left and right sides of the lower pressure ring piece, and the iron ring is slidably connected to the guide strip, and the front and rear sides of the upper pressure ring piece and the lower pressure ring piece are provided with avoidance openings, through which the iron ring is pushed to slide on the guide strip.

[0012] As a further improvement of the above technical solution, the film expansion drive mechanism includes a driving assembly, a transmission assembly and multiple lifting assemblies. The lifting assembly includes a lifting nut and a T-screw. The T-screw is threadedly connected to the lifting nut. The lifting nut is rotatably connected to the expansion ring base through a bearing. The head of the T-screw is fixedly connected to the lower pressure ring. The transmission assembly is connected between the lifting nut and the driving assembly to drive the lifting nuts of the four lifting assemblies to rotate synchronously.

[0013] As a further improvement of the above technical solution, the drive assembly includes a servo motor, a gear set and a gear base, the gear set includes a first bevel gear, a second bevel gear, a driving gear, a driven gear, a first gear shaft and a second gear shaft, the first gear shaft is rotatably connected to the gear base, the second bevel gear and the driving gear are both fixed on the first gear shaft, the first bevel gear is fixed on the main shaft of the servo motor, the first bevel gear is meshed with the second bevel gear, the second gear shaft is rotatably connected to the film expansion base, the driven gear is fixed on the second gear shaft, and the driven gear is meshed with the driving gear.

[0014] As a further improvement of the above technical solution, the transmission assembly includes a belt, a driving pulley and multiple driven pulleys, the driving pulley is fixed on the second gear shaft, and the multiple driven pulleys are respectively fixed on multiple lifting nuts, and the belt is wound around the driving pulley and multiple driven pulleys in sequence.

[0015] As a further improvement of the above technical solution, the transmission assembly further includes a tensioning wheel and a plurality of limiting wheels. The tensioning wheel is used to adjust the tension of the belt, and the four limiting wheels are used to guide the direction of the belt.

[0016] The beneficial effects of the present invention are:

[0017] The four evenly distributed, annular thrust deep-groove ball bearings in the bearing support assembly, along with the V-shaped grooves and annular ridges, provide stable support for the ring expansion base's rotation without causing any jamming. The stepper motor drives the screw of the lead screw module, which in turn moves the calibration axis slide. The cam follower moves within the U-shaped grooves, rotating the ring expansion base. This allows for precise adjustment of the ring expansion base's rotation, thereby correcting the chip's angle with high speed and precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and examples.

[0019] Figure 1 This is a schematic diagram of the assembly of a chip angle correction and film expansion device according to an embodiment of the present invention;

[0020] Figure 2 This is a structural breakdown diagram of the chip angle correction and film expansion device according to an embodiment of the present invention;

[0021] Figure 3 2 is a schematic structural diagram of a bearing support assembly of a chip angle correction and film expansion device according to an embodiment of the present invention;

[0022] Figure 4 2. It is a schematic structural diagram of a fixed rotating shaft of a chip angle correction and film expansion device according to an embodiment of the present invention;

[0023] Figure 5 2. It is a schematic structural diagram of the deflection rotation axis of the chip angle correction and film expansion device according to an embodiment of the present invention;

[0024] Figure 6 is a cross-sectional view of a bearing support assembly of a chip angle correction and film expansion device according to an embodiment of the present invention;

[0025] Figure 7 2 is a schematic structural diagram of a calibration component of a chip angle correction and film expansion device according to an embodiment of the present invention;

[0026] Figure 8 2. It is a structural diagram of a ring clamp of a chip angle correction and film expansion device according to an embodiment of the present invention;

[0027] Figure 9 This is a schematic diagram of the structure of the film expansion drive mechanism of the chip angle correction film expansion device according to an embodiment of the present invention. Figure 1 ;

[0028] Figure 10 This is a schematic diagram of the structure of the film expansion drive mechanism of the chip angle correction film expansion device according to an embodiment of the present invention. Figure 2 ;

[0029] Figure 11 is a cross-sectional view of a lifting assembly of a chip angle correction and film expansion device according to an embodiment of the present invention;

[0030] Figure 12 It is a structural schematic diagram of the lifting component of the chip angle correction and film expansion device according to an embodiment of the present invention.

[0031] Figure numerals: 1, support seat; 2, ring expansion base; 21, annular ridge; 3, membrane expansion fixing seat; 4, ring clamp; 41, upper pressure ring; 42, lower pressure ring; 43, equal height column; 44, guide bar; 45, iron ring; 5, bearing support assembly; 51, thrust deep groove ball bearing; 52, V-shaped slide; 53, limit bolt; 54, calibration limit block; 55, fixed rotating shaft; 56, deflection rotating shaft; 6, calibration assembly; 61, stepping motor; 62, screw module; 63, calibration screw base; 64, calibration axis slide; 65, linear guide rail; 66, U-shaped slide; 67. Cam follower; 68. Calibration axis light shield; 69. Slot-type photoelectric sensor; 7. Film expansion drive mechanism; 71. Drive assembly; 711. Servo motor; 712. First bevel gear; 713. Second bevel gear; 714. First gear shaft; 715. Driving gear; 716. Driven gear; 717. Second gear shaft; 72. Transmission assembly; 721. Belt; 722. Driving pulley; 723. Driven pulley; 724. Limiting wheel; 725. Tensioning pulley; 73. Lifting assembly; 731. T-screw; 732. Lifting nut; 733. Bearing. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, all the connection / connection relationships involved in the patent do not simply refer to the direct connection of components, but refer to the fact that a better connection structure can be formed by adding or reducing connection accessories according to the specific implementation situation. For example, fixed connection / fixed installation can be selected from screw connection, bolt connection, pin connection, key connection, bonding, mortise and tenon connection, welding, riveting and other methods as needed. For detachable connection, screw connection, bolt connection, threaded connection, snap connection, mortise and tenon connection, Velcro connection and other methods can be selected as needed. The various technical features in the invention can be combined interchangeably without conflicting with each other.

[0033] Reference Figure 1 、 Figure 2An embodiment of the present invention provides a chip angle correction and film expansion device, comprising a support seat 1, a ring clamp 4, a ring expansion base 2, a film expansion fixing seat 3, a film expansion driving mechanism 7 and an angle correction mechanism, wherein the ring clamp 4 is sleeved on the outer periphery of the film expansion fixing seat 3, the film expansion fixing seat 3 is fixedly connected to the ring expansion base 2, the film expansion driving mechanism 7 is installed on the support seat 1 and is used to drive the ring clamp 4 to move closer to or away from the ring expansion base 2, the ring clamp 4 is used to place an iron ring 45 with a blue film, the blue film has a chip on it, and the blue film is located at the center hole of the ring clamp 4, when the ring clamp 4 moves close to the ring expansion base 2, the film expansion fixing seat 3 lifts the edge of the blue film, thereby realizing the film expansion work; in addition, the angle correction mechanism is used to drive the ring expansion base 2 to rotate, thereby correcting the angle of the chip.

[0034] In this embodiment, referring to Figure 1 The angle correction mechanism includes a bearing support assembly 5 and a calibration assembly 6 provided on the support seat 1. The bearing support assembly 5 is used to support the ring expansion base 2, and the calibration assembly 6 is used to drive the ring expansion base 2 to rotate to correct the angle of the chip. Figure 3 and Figure 6 The bearing support assembly 5 includes four thrust deep groove ball bearings 51 evenly distributed in an annular shape. The thrust deep groove ball bearings 51 are connected to the support seat 1 through a rotating shaft. The outer peripheral surface of the thrust deep groove ball bearings 51 is provided with a V-shaped groove 52. The side of the expansion ring base 2 is provided with four annular ridges 21. The four annular ridges 21 are all centered on the center of the expansion ring base 2, that is, the four annular ridges 21 are on the same circle. The longitudinal section of the annular ridge 21 is V-shaped. The annular ridge 21 corresponds to the four V-shaped grooves 52 one by one, and the annular ridge 21 is slidably connected to the V-shaped grooves 52, so that the ring expansion base 2 is stably supported by the V-shaped grooves 52 of the four thrust deep groove ball bearings 51, and the ring expansion base 2 can be rotated based on the four thrust deep groove ball bearings 51 to facilitate the correction of the angle of the chip. When the ring expansion base 2 can be rotated based on the thrust deep groove ball bearings 51, the thrust deep groove ball bearings 51 themselves will also rotate, thereby avoiding the situation where the ring expansion base 2 gets stuck when rotating.

[0035] Reference Figure 7The calibration component 6 includes a stepper motor 61, a screw module 62, a calibration screw base 63 and a calibration shaft slide 64. The stepper motor 61 and the calibration screw base 63 are fixedly connected to the support seat 1. The screw module 62 is installed on the calibration screw base 63. The stepper motor 61 is used to drive the screw of the screw module 62 to rotate. The calibration shaft slide 64 is fixedly connected to the nut of the screw module 62, and the calibration shaft slide 64 is slidably connected to the calibration screw base 63 through a linear guide rail 65, so that when the main shaft of the stepper motor 61 rotates, the screw is driven to rotate, thereby driving the calibration shaft slide 64 to move.

[0036] A U-shaped slide 66 is provided on the calibration shaft slide 64, and a cam follower 67 is provided on the ring expansion base 2. The cam follower 67 is connected to the U-shaped slide 66. When the calibration shaft slide 64 moves, the cam follower 67 moves in the U-shaped slide 66, and drives the ring expansion base 2 to rotate under the push of the U-shaped slide 66.

[0037] It is understandable that, by providing the thrust deep groove ball shaft and the calibration assembly 6, the position of the ring expansion base 2 can be corrected to prevent the ring expansion base 2 from being displaced, thereby avoiding the ring clamp 4 from being displaced. When the iron ring 45 is placed on the ring clamp 4, the positions of the multiple chips on the blue film can be ensured to be accurate, which is convenient for the placement head to absorb the chips during welding and ensure the accuracy of welding. For example, when the angle of the chip on the blue film deviates to the left, the stepper motor 61 drives the screw rod to rotate forward, driving the calibration axis slide 64 to move to the right, so that the ring expansion base 2 can be rotated in the counterclockwise direction to correct the angle of the chip. Similarly, when the angle of the chip on the blue film deviates to the right, the stepper motor 61 drives the screw rod to reverse, driving the calibration axis slide 64 to move to the left, so that the ring expansion base 2 can be rotated in the clockwise direction to correct the angle of the chip.

[0038] Furthermore, a slot-shaped photoelectric sensor 69 is provided on the support seat 1, and a calibration axis light shielding plate 68 used in conjunction with the slot-shaped photoelectric sensor 69 is provided on the calibration axis slide 64. When the calibration axis light shielding plate 68 moves, it passes through the slot-shaped photoelectric sensor 69, and the slot-shaped photoelectric sensor 69 detects the moving distance of the calibration axis slide 64, thereby accurately controlling the rotation angle of the expansion ring base 2 and improving the accuracy of the chip angle correction.

[0039] In some embodiments, reference Figure 3-Figure 5The rotating shaft includes a fixed rotating shaft 55 and a deflecting rotating shaft 56. The two thrust deep groove ball bearings 51 near the calibration axis slide 64 are connected to the support base 1 via the fixed rotating shaft 55, while the other two thrust deep groove ball bearings 51 are connected to the support base 1 via the deflecting rotating shaft 56. It is understood that if the ring expansion base 2 is not positioned accurately, the two deflecting rotating shafts 56 can be rotated to adjust the position of the thrust deep groove ball bearings 51 and correct the ring expansion base 2 to the accurate position.

[0040] In this embodiment, the angle correction mechanism further includes a calibration limiter, referring to Figure 3 The calibration limit member includes a calibration limit block 54 provided on the support seat 1 and a limit bolt 53 provided on the ring expansion base 2. When the ring expansion base 2 rotates, the limit bolt 53 abuts against the calibration limit block 54 for limiting, thereby preventing the ring expansion base 2 from rotating too much and causing the annular ridge 21 to disengage from the V-shaped groove 52.

[0041] In this embodiment, referring to Figure 8 The ring clamp 4 includes a lower pressure ring piece 42 and an upper pressure ring piece 41. The upper pressure ring piece 41 is arranged on the top of the lower pressure ring piece 42 through a number of equal-height columns 43. The accommodating space is formed between the upper pressure ring piece 41 and the lower pressure ring piece 42. The accommodating space is used to place the iron ring 45. The top of the lower pressure ring piece 42 is provided with a first through hole, and the top of the upper pressure ring piece 41 is provided with a second through hole. The first through hole and the second through hole are coaxially arranged and form the center hole of the ring clamp 4. The blue film on which the chip is placed on the iron ring 45 is located at the center hole, so that the film expansion fixing seat 3 can lift the edge of the blue film to realize the film expansion work.

[0042] Furthermore, a guide strip 44 is provided on the left and right sides of the lower pressure ring piece 42, and the iron ring 45 is slidably connected to the guide strip 44, and the front and rear sides of the upper pressure ring piece 41 and the lower pressure ring piece 42 are provided with avoidance openings, through which the iron ring 45 is pushed to slide on the guide strip 44, thereby facilitating the installation and disassembly of the iron ring 45 on the ring clamp 4.

[0043] In this embodiment, referring to Figures 9-11When the lifting nut 732 rotates, the T-screw 731 is lifted and lowered under the action of the thread, thereby driving the lower pressure ring 42 and the entire ring clamp 4 to lift and lower. When the ring clamp 4 descends and moves close to the ring expansion base 2, the film expansion fixing seat 3 lifts the edge of the blue film, causing the blue film to stretch and expand, thereby realizing the film expansion work, so that the multiple chips on the blue film are separated from each other.

[0044] Furthermore, the driving assembly 71 includes a servo motor 711, a gear set and a gear base, the gear set includes a first bevel gear 712, a second bevel gear 713, a driving gear 715, a driven gear 716, a first gear shaft 714 and a second gear shaft 717, the first gear shaft 714 is rotatably connected to the gear base, the second bevel gear 713 and the driving gear 715 are both fixed on the first gear shaft 714, the first bevel gear 712 is fixed on the main shaft of the servo motor 711, the first bevel gear 712 is meshed with the second bevel gear 713, the second gear shaft 717 is rotatably connected to the film expansion base, the driven gear 716 is fixed on the second gear shaft 717, and the driven gear 716 is meshed with the driving gear 715.

[0045] The transmission assembly 72 includes a belt 721, a driving pulley 722 and multiple driven pulleys 723. The driving pulley 722 is fixed on the second gear shaft 717, and the multiple driven pulleys 723 are respectively fixed on multiple lifting nuts 732. The belt 721 is sequentially wound around the driving pulley 722 and the multiple driven pulleys 723.

[0046] It can be understood that when the servo motor 711 is running, the first bevel gear 712 rotates with the main shaft of the servo motor 711 to drive the second bevel gear 713 to rotate, thereby driving the first gear shaft 714 and the driving gear 715 to rotate. When the driving gear 715 rotates, it drives the driven gear 716 to rotate, and then drives the second gear shaft 717 and the driving pulley 722 to rotate. When the driving pulley 722 rotates, it drives the driven pulley 723 to rotate under the transmission of the belt 721, so as to realize the rotation of the lifting nut 732, thereby realizing the lifting and lowering of the ring clamp 4.

[0047] In some embodiments, reference Figure 9The transmission assembly 72 also includes a tensioning wheel 725 and multiple limiting wheels 724. The belt 721 passes around the tensioning wheel 725 and the limiting wheels 724. The tensioning wheel 725 is used to adjust the tension of the belt 721, and the limiting wheels 724 are used to guide the direction of the belt 721 to achieve a reasonable layout of the structure.

[0048] The above is a specific description of the preferred implementation of the present invention, but the invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A chip angle correction and film expansion device, comprising a support base, a ring clamp, a ring expansion base, a film expansion fixing base, a film expansion drive mechanism, and an angle correction mechanism. The ring clamp is sleeved on the outer periphery of the film expansion fixing base, the film expansion fixing base is fixedly connected to the ring expansion base, and the film expansion drive mechanism is mounted on the support base and is used to drive the ring clamp to move toward or away from the ring expansion base. The device is characterized by: The angle correction mechanism includes a bearing support assembly and a calibration assembly arranged on the support seat, the bearing support assembly includes a plurality of thrust deep groove ball bearings uniformly distributed in an annular shape, and the outer peripheral surfaces of the plurality of thrust deep groove ball bearings are provided with V-shaped grooves, the side of the expansion ring base is provided with a plurality of annular ridges, the plurality of annular ridges are all centered on the center of the expansion ring base, and the longitudinal cross-section of the annular ridges is V-shaped, the plurality of annular ridges correspond one-to-one to the plurality of V-shaped grooves, and the annular ridges are slidably connected in the V-shaped grooves; The calibration assembly includes a stepper motor, a screw module, a calibration screw base and a calibration shaft slide. The stepper motor is used to drive the screw of the screw module to rotate. The calibration shaft slide is fixedly connected to the nut of the screw module, and the calibration shaft slide is slidably connected to the calibration screw base. A U-shaped slide is provided on the calibration shaft slide. A cam follower is provided on the expansion ring base, and the cam follower is connected to the U-shaped slide. When the calibration axis slide moves, the cam follower moves in the U-shaped slide and is used to drive the ring expansion base to rotate; There are four thrust deep groove ball bearings, among which two thrust deep groove ball bearings close to the calibration axis slide are connected to the support seat through a fixed rotating shaft, and the other two thrust deep groove ball bearings are connected to the support seat through a biased rotating shaft.

2. The chip angle correction and film expansion device according to claim 1, characterized in that: The angle correction mechanism also includes a calibration limiter, which includes a calibration limit block provided on the support seat and a limit bolt provided on the ring expansion base. When the ring expansion base rotates, the limit bolt abuts against the calibration limit block to form a limit.

3. The chip angle correction and film expansion device according to claim 1, characterized in that: A slot-shaped photoelectric sensor is provided on the support seat, and a calibration axis light shielding plate used in conjunction with the slot-shaped photoelectric sensor is provided on the calibration axis slide. The calibration axis light shielding plate passes through the slot-shaped photoelectric sensor when moving.

4. The chip angle correction and film expansion device according to claim 1, characterized in that: The ring clamp includes a lower pressure ring piece and an upper pressure ring piece, the upper pressure ring piece is arranged on the top of the lower pressure ring piece through a number of equal-height columns, and an accommodating space is formed between the upper pressure ring piece and the lower pressure ring piece, and the accommodating space is used to place the iron ring, the top of the lower pressure ring piece is provided with a first through hole, and the top of the upper pressure ring piece is provided with a second through hole, the first through hole and the second through hole are coaxially arranged and form the center hole of the ring clamp, and the blue film for placing the chip on the iron ring is located at the center hole.

5. The chip angle correction and film expansion device according to claim 4, characterized in that: A material guide strip is respectively provided on the left and right sides of the lower pressure ring piece, and the iron ring is slidably connected to the material guide strip, and the front and rear sides of the upper and lower pressure ring pieces are provided with avoidance openings, through which the iron ring is pushed to slide on the material guide strip.

6. The chip angle correction and film expansion device according to claim 4, characterized in that: The film expansion drive mechanism includes a drive assembly, a transmission assembly and multiple lifting assemblies. The lifting assembly includes a lifting nut and a T-screw. The T-screw is threadedly connected to the lifting nut. The lifting nut is rotatably connected to the expansion ring base through a bearing. The head of the T-screw is fixedly connected to the lower pressure ring. The transmission assembly is connected between the lifting nut and the drive assembly to drive the lifting nuts of the four lifting assemblies to rotate synchronously.

7. The chip angle correction and film expansion device according to claim 6, characterized in that: The drive assembly includes a servo motor, a gear set and a gear base. The gear set includes a first bevel gear, a second bevel gear, a driving gear, a driven gear, a first gear shaft and a second gear shaft. The first gear shaft is rotatably connected to the gear base. The second bevel gear and the driving gear are both fixed on the first gear shaft. The first bevel gear is fixed on the main shaft of the servo motor. The first bevel gear is meshed with the second bevel gear. The second gear shaft is rotatably connected to the expansion ring base. The driven gear is fixed on the second gear shaft. The driven gear is meshed with the driving gear.

8. The chip angle correction and film expansion device according to claim 7, characterized in that: The transmission assembly includes a belt, a driving pulley and multiple driven pulleys, the driving pulley is fixed on the second gear shaft, the multiple driven pulleys are respectively fixed on multiple lifting nuts, and the belt is sequentially wound around the driving pulley and the multiple driven pulleys.

9. The chip angle correction and film expansion device according to claim 8, characterized in that: The transmission assembly further includes a tensioning wheel and a plurality of limiting wheels. The tensioning wheel is used to adjust the tension of the belt, and the four limiting wheels are used to guide the direction of the belt.

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