Automatic welding device and welding method for chip packaging

Abstract

The present invention discloses an automatic welding device and a welding method for chip packaging, and relates to the field of chip packaging welding and fixing technology. The present invention comprises a support arm, a sliding arm is movably connected to one side of the support arm, a sleeve frame is fixedly connected to one end of the sliding arm, and the interior of the sleeve frame is divided into a driving chamber and a clamping chamber by a partition; the clamping assembly has two groups, each group is connected to the bottom of the second gear, and the clamping assembly comprises a fixed toothed disc, a movable toothed disc, a screw rod, a connecting hoop, a rotating member, a connecting arm, a slider, a touch switch and a clamping arm, the fixed toothed disc is fixedly connected to the bottom of the second gear, and the fixed toothed disc and the movable toothed disc are meshed with each other, one side of the movable toothed disc is fixedly connected to the screw rod, the side surface of the screw rod is movably connected to the connecting hoop, and the bottom of the connecting hoop is fixedly connected to the rotating member. The present invention relies on only four gears, and the structure of the present invention is simple, and the rotation angle of the gear is easy to control and calculate, so the clamping of the chip can be precisely controlled.

Description

Technical Field

[0001] The invention belongs to the technical field of chip packaging welding and fixing, and in particular relates to an automatic welding device and a welding method for chip packaging. Background Art

[0002] The shell used to install semiconductor integrated circuit chips plays the role of placing, fixing, sealing, protecting the chips and enhancing the electrical and thermal performance. It is also a bridge between the internal world of the chip and the external circuit - the contacts on the chip are connected to the pins of the package shell with wires, and these pins are connected to other devices through wires on the printed circuit board. Therefore, packaging plays an important role for CPUs and other LSI integrated circuits.

[0003] At present, some large enterprises have begun to use imported equipment for chip packaging and processing, but most enterprises are still using manual operations to carry out production. In response to this situation, more and more enterprises have launched automatic chip packaging structures. During the packaging process, the chip body and the pins need to be connected by gold wires, and the chip body needs to be kept in the correct welding point position during the welding process to avoid the occurrence of incorrect welding positions during the welding process. Therefore, the clamping state of the chip requires precise support from the clamping component; during the welding process, after the two solder joints are formed, the wire bonding machine and the solder joints are still in a connected state. Therefore, the wire bonding machine is required to break the gold wire. When the gold wire is broken, a reaction force is generated on the chip, causing the chip to vibrate. At this time, the chip is prone to displacement, which makes subsequent welding of other solder joints difficult.

[0004] The existing automatic welding device for chip packaging cannot accurately fix the chip to the processing position during the chip clamping process, and the chip is prone to displacement during the welding process, resulting in inaccurate subsequent chip solder joints and affecting chip welding. For this reason, we propose an automatic welding device for chip packaging and a welding method thereof. Summary of the invention

[0005] The purpose of the present invention is to provide an automatic welding device and a welding method for chip packaging, so as to solve the problem that the existing automatic welding device for chip packaging cannot accurately fix the chip to the processing position during the chip clamping process, and the chip is easily displaced during the welding process, resulting in inaccurate subsequent chip welding points, affecting the chip welding.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] The present invention is an automatic welding device for chip packaging, comprising a support arm, a sliding arm is movably connected to one side of the support arm, a sleeve frame is fixedly connected to one end of the sliding arm, and the interior of the sleeve frame is divided into a driving chamber and a clamping chamber by a partition; a driving component is fixedly arranged inside the driving chamber, a clamping component is fixedly arranged inside the clamping chamber, and the clamping component is movably connected to the driving component;

[0008] Preferably, the support arm is fixedly connected to one side of the top of the base, and a conveyor belt is fixedly connected to the top of the base, and the conveyor belt is located directly below the clamping assembly.

[0009] Preferably, the top of the support arm is fixedly connected to a frame, the bottom of one end of the frame is fixedly connected to a welding seal structure, the welding seal structure is located directly above the clamping assembly, and the welding seal structure, drive assembly, clamping assembly and conveyor belt are arranged in sequence from top to bottom.

[0010] The driving assembly includes a pulley, a belt, a first gear, a second gear and a third gear, the pulley is movably connected to the bottom end of the inner wall of the driving chamber, the peripheral side of the pulley is movably connected to one end of the belt, the other end of the belt is movably connected to the peripheral side of the first gear, two second gears are meshed inside the first gear, the two second gears are meshed with each other through the third gear, the bottom of the third gear and the bottom of the first gear are both movably connected to the bottom end of the inner wall of the driving chamber, and the bottoms of the two second gears both penetrate the driving chamber to the inside of the clamping chamber;

[0011] Preferably, the driving assembly also includes a motor, which is fixedly connected to the top of the sleeve, and the bottom output end of the motor passes through the top of the sleeve to the inside of the driving chamber and is fixedly connected to the top of the pulley. A rotating groove is opened at the bottom end of the inner wall of the driving chamber, and the bottom of the pulley is movably arranged inside the rotating groove.

[0012] The clamping assembly has two groups, each group is connected to the bottom of the second gear, the clamping assembly includes a fixed toothed disc, a movable toothed disc, a screw rod, a connecting hoop, a rotating member, a connecting arm, a slider, a touch switch and a clamping arm, the fixed toothed disc is fixedly connected to the bottom of the second gear, and the fixed toothed disc and the movable toothed disc are meshed with each other, one side of the movable toothed disc is fixedly connected to the screw rod, the side surface of the screw rod is movably connected to the connecting hoop, the bottom of the connecting hoop is fixedly connected to the rotating member, the interior of the rotating member is fixedly connected to one end of the connecting arm, the other end of the connecting arm is movably connected to the slider, a sliding groove is provided on the outside of the clamping arm, one end of the inner wall of the sliding groove is fixedly connected to the touch switch, the slider is movably arranged in the sliding groove, the slider is movably connected to the touch switch, and the two clamping arms form a rectangle.

[0013] Preferably, the clamping assembly also includes a first fixed sleeve and a second fixed sleeve, the first fixed sleeve is movably connected to one end of the screw rod, and the first fixed sleeve is fixedly connected to the inner wall of the clamping chamber; the second fixed sleeve is movably connected to the other end of the screw rod, and the second fixed sleeve is fixedly connected to the inner wall of the clamping chamber, and the second fixed sleeve is adjacent to the movable toothed disc.

[0014] Preferably, the center position of the sleeve frame and the partition are both provided with through holes of corresponding sizes, and the center position of the third gear is a hollow shape in the center of a circle, and its size is larger than the through holes provided in the sleeve frame and the partition.

[0015] Preferably, mounting holes are respectively formed on two opposite sides of the top of the partition, and the bottom ends of the two second gears respectively penetrate the two mounting holes and are movably arranged inside the mounting holes.

[0016] Preferably, the interior of the rectangle enclosed by the two clamping arms is the chip placement position, and the maximum angle of horizontal rotation of the clamping arms is °.

[0017] A welding method of an automatic welding device for chip packaging, comprising the following steps:

[0018] S1. Place a large number of chips to be packaged on a conveyor belt, start the conveyor belt to convey the chips to the support arm position in sequence, and the sliding arm drives the sleeve to slide downward until the clamping assembly can contact the chips on the conveyor belt;

[0019] S2, the motor is started to drive the pulley to rotate. During the rotation of the pulley, the first gear is driven to rotate through the transmission of the belt, and the second gear meshing with the first gear is driven to rotate at the same time;

[0020] S3, the second gear rotates clockwise, driving the fixed toothed disc and the movable toothed disc at the bottom to rotate in turn, and the screw connected to it rotates at the same time, driving the connecting hoop on its surface to move from one end of the screw adjacent to the second fixed sleeve to the other end, and at this time, the two clamping arms gradually move towards each other;

[0021] S4. When the connecting hoop moves to the midpoint of the screw, the two connecting arms come into contact with each other to form a closed rectangular space. When the connecting hoop continues to move to the other end of the screw, the slider slides inside the slide groove. After the clamp arm rotates 17°, the slider contacts the touch switch, triggering the switch and starting the welding structure to perform packaging welding on the chip surface.

[0022] The present invention has the following beneficial effects:

[0023] The present invention sets up a driving component driven only by a motor, and drives the pulley at the bottom thereof to rotate by the motor. Since the pulley is connected to the first gear by a belt, when the pulley rotates, the first gear starts to rotate through the transmission of the belt. The driving device of the present invention can be completed by only one first gear, two second gears and a third gear for fixing the two second gears. The gears have better connectivity and are not easily damaged during the driving process. The connection between the gears is tighter, which can ensure less energy loss during the driving process. With only four gears, the present invention has a simple structure, and the rotation angle of the gears is easy to control and calculate, so the clamping of the chip can be precisely controlled.

[0024] The present invention sets a clamping assembly. When the second gear at the top drives the fixed toothed disc at the bottom to start rotating, the movable toothed disc vertically distributed therewith also starts rotating. Finally, in a series of movement processes, the two clamping arms start to move toward each other. When the connecting hoop moves to the midpoint of the screw rod, the two clamping arms close to form a rectangular space, thereby fixing and clamping the chip. At this time, the connecting hoop continues to move. Under the action of the rotating member and the slider, the chip clamped between the two clamping arms starts to rotate horizontally. Finally, after rotating 17°, the slider touches the touch switch. At this time, the chip is facing the welding sealing structure, which is remotely started by the touch switch to package and weld the chip. When vibration is generated during the welding process, in order to avoid chip displacement while the welding sealing structure still operates incorrectly, the chip is tightly clamped by the clamping arm, so that the chip can only be shaken by shaking the clamping arm. When the clamping arm shakes left and right, the slider does not continue to contact the touch switch, which causes the welding sealing structure to be powered off, and the welding sealing structure cannot continue to weld and package the chip in a shaking state, thereby ensuring that the chip can be packaged in a stable state. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the overall structure of the automatic soldering device for chip packaging provided by the present invention;

[0027] Figure 2 One of the schematic diagrams of the internal structure of the housing of the automatic welding device for chip packaging provided by the present invention;

[0028] Figure 3 A schematic diagram of the bottom structure of a housing frame of an automatic welding device for chip packaging provided by the present invention;

[0029] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle;

[0030] Figure 5 A schematic diagram of the internal structure of a driving chamber of an automatic welding device for chip packaging provided by the present invention;

[0031] Figure 6 A schematic diagram of the structure of a clamping assembly of an automatic welding device for chip packaging provided by the present invention;

[0032] Figure 7 The second schematic diagram of the internal structure of the housing of the automatic welding device for chip packaging provided by the present invention;

[0033] Figure 8 For the present invention Figure 7 Enlarged view of point B in the middle.

[0034] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0035] Base; 2. Conveyor belt; 3. Support arm; 4. Frame; 5. Welding structure; 6. Sliding arm; 7. Sleeve frame; 8. Partition; 9. Motor; 10. Pulley; 11. Belt; 12. First gear; 13. Second gear; 14. Third gear; 15. Fixed gear plate; 16. Movable gear plate; 17. First fixed sleeve; 18. Second fixed sleeve; 19. Screw rod; 20. Connecting hoop; 21. Rotating part; 22. Connecting arm; 23. Sliding block; 24. Touch switch; 25. Clamp arm. Implementation

[0036] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0037] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] See also Figure 1-8 The present invention is an automatic welding device for chip packaging, comprising a support arm 3, a sliding arm 6 is movably connected to one side of the support arm 3, a sleeve frame 7 is fixedly connected to one end of the sliding arm 6, and the interior of the sleeve frame 7 is divided into a driving chamber and a clamping chamber by a partition 8; a driving component is fixedly arranged inside the driving chamber, and a clamping component is fixedly arranged inside the clamping chamber, and the clamping component is movably connected to the driving component. The support arm 3 is used to support the sleeve frame 7 and drive the sliding arm 6 to slide up and down. The sliding arm 6 is used to drive the sleeve frame 7 to slide up and down. The sleeve frame 7 serves as a shell for clamping the chip, and the interior is used to set the driving component and the clamping component. The partition 8 is used to separate the internal space of the sleeve frame 7 into a driving chamber and a clamping chamber;

[0040] Among them, the support arm 3 is fixedly connected to one side of the top of the base 1, and a conveyor belt 2 is fixedly connected to the top of the base 1. The conveyor belt 2 is located directly below the clamping assembly. The base 1 serves as the main part of the welding device and plays a supporting role. The conveyor belt 2 is used to convey a large number of chips to be processed to the bottom of the sleeve 7. The chips are clamped by the clamping assembly and packaged and welded by the welding sealing structure.

[0041] Among them, the top of the support arm 3 is fixedly connected to the frame 4, and the bottom of one end of the frame 4 is fixedly connected to the welding sealing structure 5. The welding sealing structure 5 is located directly above the clamping assembly. The welding sealing structure 5, the driving assembly, the clamping assembly and the conveyor belt 2 are arranged from top to bottom in sequence. The inside of the frame 4 is used to connect the welding sealing structure at its bottom, and the welding sealing structure 5 is used to package and weld the chip.

[0042] The driving assembly includes a pulley 10, a belt 11, a first gear 12, a second gear 13 and a third gear 14. The pulley 10 is movably connected to the bottom end of the inner wall of the driving chamber. The side surface of the pulley 10 is movably connected to one end of the belt 11. The other end of the belt 11 is movably connected to the side surface of the first gear 12. Two second gears 13 are meshed inside the first gear 12. The two second gears 13 are meshed with each other through the third gear 14. The bottom of the third gear 14 and the bottom of the first gear 12 are both movably connected to the bottom end of the inner wall of the driving chamber. The bottoms of the two second gears 13 both penetrate the driving chamber to the inside of the clamping chamber. The pulley 10 is used to rotate, thereby driving the belt 11 to transmit. The belt 11 plays a role in driving the first gear 12 to rotate. The first gear 12 is used to drive the second gear 13 meshed with it to rotate during the rotation process. The rotation of the second gear 13 is used to drive the clamping assembly at its bottom to move, thereby driving the clamping assembly to clamp the chip. The third gear 14 plays a role in fixing and limiting the second gear 13 to prevent the second gear 13 from being displaced.

[0043] Among them, the driving component also includes a motor 9, which is fixedly connected to the top of the sleeve 7. The bottom output end of the motor 9 passes through the top of the sleeve 7 to the inside of the driving chamber, and is fixedly connected to the top of the pulley 10. A rotating groove is opened at the bottom end of the inner wall of the driving chamber, and the bottom of the pulley 10 is movably arranged inside the rotating groove. The motor 9 is used to drive the pulley 10 at its bottom to rotate, and is the only driving component of the driving component of the present invention.

[0044] There are two groups of clamping components, each group is connected to the bottom of the second gear 13, and the clamping components include a fixed toothed disc 15, a movable toothed disc 16, a screw rod 19, a connecting hoop 20, a rotating member 21, a connecting arm 22, a slider 23, a touch switch 24 and a clamping arm 25. The fixed toothed disc 15 is fixedly connected to the bottom of the second gear 13, and the fixed toothed disc 15 and the movable toothed disc 16 are meshed with each other. One side of the movable toothed disc 16 is fixedly connected to the screw rod 19, and the side of the screw rod 19 is movably connected to the connecting hoop 20. The bottom of the connecting hoop 20 is fixedly connected to the rotating member 21, the interior of the rotating member 21 is fixedly connected to one end of the connecting arm 22, the other end of the connecting arm 22 is movably connected to the slider 23, a slide groove is provided on the outside of the clamping arm 25, one end of the inner wall of the slide groove is fixedly connected to the touch switch 24, the slider 23 is movably arranged inside the slide groove, the slider 23 is movably connected to the touch switch 24, the two clamping arms 25 form a rectangle, the fixed toothed disc 15 is used to drive the movable toothed disc 16 vertically meshed with it to rotate, and the fixed toothed disc 15 The second gear 13 is driven to rotate under the rotation, thereby driving the movable toothed disc 16 to rotate. The screw rod 19 is driven to rotate under the rotation of the movable toothed disc 16, thereby driving the connecting hoop 20 to slide on the surface of the screw rod 19. The connecting hoop 20 is used to slide on the surface of the screw rod 19, thereby driving the clamping arm 25 to move. The rotating member 21 is used to change the angle of the clamping arm 25, so that the chip in the welding process is finally facing the welding sealing structure. The connecting arm 22 is used to connect the rotating member 21 and the slider 23. The slider 23 is used to drive the connecting arm 22 to slide inside the slide groove. When the connecting hoop 20 moves to the midpoint of the screw rod 19, the clamping arm 25 can no longer move. When the connecting hoop 20 continues to move, the rotating member 21 changes its angle, driving the clamping arm 25 to gradually rotate, and the final rotation angle is 17°. The touch switch 24 serves as a remote start switch of the welding sealing structure 5. When the slider 23 touches the touch switch 24, it means that the chip clamped by the clamping arm 25 is facing the welding sealing structure 5. At this time, the welding sealing structure 5 can be started to perform packaging welding operations.

[0045] Among them, the clamping assembly also includes a first fixed sleeve 17 and a second fixed sleeve 18. The first fixed sleeve 17 is movably connected to one end of the screw rod 19, and the first fixed sleeve 17 is fixedly connected to the inner wall of the clamping chamber; the second fixed sleeve 18 is movably connected to the other end of the screw rod 19, and the second fixed sleeve 18 is fixedly connected to the inner wall of the clamping chamber. The second fixed sleeve 18 is adjacent to the movable toothed disc 16. The first fixed sleeve 17 and the second fixed sleeve 18 are used to fix the screw rod 19 so that the screw rod 19 can rotate normally.

[0046] The center of the sleeve 7 and the partition 8 are both provided with through holes of corresponding sizes. The center of the third gear 14 is a hollow shape, and its size is larger than the through holes of the sleeve 7 and the partition 8.

[0047] There are mounting holes at two opposite sides of the top of the partition 8, and the bottom ends of the two second gears 13 pass through the two mounting holes respectively and are movably arranged inside the mounting holes.

[0048] The interior of the rectangle enclosed by the two clamping arms 25 is the chip placement position, and the maximum angle of horizontal rotation of the clamping arms 25 is 17°.

[0049] A welding method of an automatic welding device for chip packaging, comprising the following steps:

[0050] S1, a large number of chips to be packaged are uniformly placed on the conveyor belt 2, and the conveyor belt 2 is started to convey the chips to the position of the support arm 3 in sequence, and the sliding arm 6 drives the sleeve frame 7 to slide downward until the clamping assembly can contact the chips on the conveyor belt 2;

[0051] S2, start the motor 9 to drive the pulley 10 to rotate. During the rotation of the pulley 10, the first gear 12 is driven by the belt 11 to rotate, and the second gear 13 meshing with the pulley 10 is driven to rotate at the same time;

[0052] S3, the second gear 13 rotates clockwise, driving the fixed toothed disc 15 and the movable toothed disc 16 at the bottom to rotate in turn, and the screw rod 19 connected thereto rotates, driving the connecting hoop 20 on its surface to move from one end of the screw rod 19 adjacent to the second fixed sleeve 18 to the other end, and at this time, the two clamping arms 25 gradually move towards each other;

[0053] S4. When the connecting hoop 20 moves to the midpoint of the screw rod 19, the two connecting arms 22 come into contact with each other to form a closed rectangular space. When the connecting hoop 20 continues to move toward the other end of the screw rod 19, the slider 23 slides inside the slide groove. After the clamp arm 25 rotates 17°, the slider 23 contacts the touch switch 24, triggering the switch and starting the welding structure 25 to perform packaging welding on the chip surface.

[0054] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An automatic soldering device for chip packaging, comprising a support arm (3), characterized in that: A sliding arm (6) is movably connected to one side of the support arm (3); a sleeve frame (7) is fixedly connected to one end of the sliding arm (6); the interior of the sleeve frame (7) is divided into a driving chamber and a clamping chamber by a partition (8); a driving component is fixedly arranged inside the driving chamber, and a clamping component is fixedly arranged inside the clamping chamber; the clamping component is movably connected to the driving component; The support arm (3) is fixedly connected to one side of the top of the base (1); the top of the base (1) is fixedly connected to a conveyor belt (2), and the conveyor belt (2) is located directly below the clamping assembly; the top of the support arm (3) is fixedly connected to a frame (4), and the bottom of one end of the frame (4) is fixedly connected to a welding seal structure (5), and the welding seal structure (5) is located directly above the clamping assembly. The welding seal structure (5), the driving assembly, the clamping assembly and the conveyor belt (2) are arranged in sequence from top to bottom; The driving assembly comprises a pulley (10), a belt (11), a first gear (12), a second gear (13) and a third gear (14); the pulley (10) is movably connected to the bottom end of the inner wall of the driving chamber; the peripheral side surface of the pulley (10) is movably connected to one end of the belt (11); the other end of the belt (11) is movably connected to the peripheral side surface of the first gear (12); two second gears (13) are meshed inside the first gear (12); the two second gears (13) are meshed with each other through the third gear (14); The bottom of the third gear (14) and the bottom of the first gear (12) are both movably connected to the bottom end of the inner wall of the driving chamber, and the bottoms of the two second gears (13) pass through the driving chamber to the inside of the clamping chamber; the driving assembly also includes a motor (9), the motor (9) is fixedly connected to the top of the sleeve (7), the bottom output end of the motor (9) passes through the top of the sleeve (7) to the inside of the driving chamber, and is fixedly connected to the top of the pulley (10), the bottom end of the inner wall of the driving chamber is provided with a rotating groove, and the bottom of the pulley (10) is movably arranged inside the rotating groove; The clamping assembly has two groups, each group is connected to the bottom of the second gear (13), and the clamping assembly includes a fixed toothed disc (15), a movable toothed disc (16), a screw rod (19), a connecting hoop (20), a rotating member (21), a connecting arm (22), a slider (23), a touch switch (24) and a clamping arm (25). The fixed toothed disc (15) is fixedly connected to the bottom of the second gear (13), and the fixed toothed disc (15) is vertically meshed with the movable toothed disc (16). One side of the movable toothed disc (16) is fixedly connected to the screw rod (19), and the side surface of the screw rod (19) is movably connected to the connecting hoop (20). The bottom of the connecting hoop (20) is connected to the rotating member. (21) is fixedly connected, the interior of the rotating member (21) is fixedly connected to one end of the connecting arm (22), the other end of the connecting arm (22) is movably connected to the slider (23), the outer side of the clamping arm (25) is provided with a slide groove, one end of the inner wall of the slide groove is fixedly connected to the touch switch (24), the slider (23) is movably arranged inside the slide groove, the slider (23) is movably connected to the touch switch (24), the touch switch (24) serves as a remote start switch of the welding sealing structure (5), the two clamping arms (25) form a rectangle; the interior of the rectangle formed by the two clamping arms (25) is the chip placement position, and the maximum angle of horizontal rotation of the clamping arm (25) is 17°.

2. The automatic soldering device for chip packaging according to claim 1, characterized in that: The clamping assembly further comprises a first fixed sleeve (17) and a second fixed sleeve (18), wherein the first fixed sleeve (17) is movably connected to one end of the screw rod (19), and the first fixed sleeve (17) is fixedly connected to the inner wall of the clamping chamber; the second fixed sleeve (18) is movably connected to the other end of the screw rod (19), and the second fixed sleeve (18) is fixedly connected to the inner wall of the clamping chamber, and the second fixed sleeve (18) is adjacent to the movable toothed disc (16).

3. The automatic soldering device for chip packaging according to claim 2, characterized in that: The center position of the sleeve (7) and the partition (8) are both provided with through holes of corresponding sizes. The center position of the third gear (14) is a hollow shape in the center of a circle, and its size is larger than the through holes provided in the sleeve (7) and the partition (8).

4. The automatic soldering device for chip packaging according to claim 3, characterized in that: Mounting holes are respectively formed on opposite sides of the top of the partition (8), and the bottom ends of the two second gears (13) respectively penetrate the two mounting holes and are movably arranged inside the mounting holes.

5. A welding method using the automatic welding device for chip packaging according to claim 4, characterized in that: The following steps are involved: S1. A large number of chips to be packaged are uniformly placed on a conveyor belt (2), and the conveyor belt (2) is started to sequentially convey the chips to the position of the support arm (3), and the sliding arm (6) drives the sleeve frame (7) to slide downward until the clamping assembly can contact the chips on the conveyor belt (2); S2, starting the motor (9) to drive the pulley (10) to rotate, and during the rotation of the pulley (10), the first gear (12) is driven to rotate by the belt (11), and the second gear (13) meshing with the pulley (10) is driven to rotate at the same time; S3, the second gear (13) rotates clockwise, driving the fixed toothed disc (15) and the movable toothed disc (16) at the bottom thereof to rotate in turn, and at the same time the screw rod (19) connected to the movable toothed disc (16) rotates, driving the connecting hoop (20) on the surface of the screw rod (19) to move from one end of the screw rod (19) adjacent to the second fixed sleeve (18) to the other end, and at this time, the two clamping arms (25) gradually move towards each other; S4. When the connecting hoop (20) moves to the midpoint of the screw rod (19), the two clamping arms (25) come into contact with each other to form a closed rectangular space. When the connecting hoop (20) continues to move toward the other end of the screw rod (19), the slider (23) slides inside the slide groove. After the clamping arm (25) rotates 17°, the slider (23) comes into contact with the touch switch (24), triggering the switch and starting the soldering structure (5) to perform packaging soldering on the chip surface.

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