A cam synchronization device for a power semiconductor ultrasonic aluminum wire bonding machine

Abstract

The present invention relates to the field of power semiconductor packaging and testing technology, and discloses a cam synchronization device for a power semiconductor ultrasonic aluminum wire bonding machine, including a base, a feeding platform, a timing mechanism and a pressure claw platform, a synchronous motor is fixedly installed on one side of the base, the feeding platform is arranged on the side above the base close to the synchronous motor, a feeding mechanism is arranged on the top of the feeding platform, the pressure claw platform is arranged on the side above the base away from the synchronous motor, the timing mechanism is arranged between the feeding platform and the pressure claw platform, and a cam synchronization shaft is fixedly installed on the output end of the synchronous motor. The cam synchronization device for a power semiconductor ultrasonic aluminum wire bonding machine adopts a cam structure for action connection synchronization, has a simple system structure, a reliable structure, stable synchronization performance, effectively improves synchronization reliability, reduces system complexity, and improves product production quality consistency.

Description

Technical Field

[0001] The invention relates to the technical field of power semiconductor packaging and testing, and in particular to a cam synchronization device of a power semiconductor ultrasonic aluminum wire bonding machine. Background Art

[0002] The material pushing structure of the aluminum wire bonding machine cooperates with the pressure claw mechanism to complete the action of material stepping-pressure claw pressing-welding-pressure claw lifting-pushing the next material. Similar products use a separate independent servo structure to complete material stepping. Multiple actions (pressure claw lifting, material stepping) are independently controlled by the control system and synchronously controlled by the control system; the pressure claw lifting uses a cylinder structure, and the material stepping uses a servo belt and hook structure; the core synchronization unit uses a PLC system to achieve soft synchronization

[0003] The traditional synchronous structure uses PLC as the core, and uses cylinders and servo motors to complete the action. The overall structure of the system is complex, and there are many hidden dangers and failure points. The synchronization real-time performance is poor, and under high-speed conditions, abnormal actions may occur due to asynchrony, which may cause system alarms or production stoppages.

[0004] Therefore, we propose a cam synchronization device for a power semiconductor ultrasonic aluminum wire bonding machine. Summary of the invention

[0005] In order to make up for the shortcomings of the prior art, the present invention provides the following technical solutions: a cam synchronization device of a power semiconductor ultrasonic aluminum wire bonding machine, comprising a base, a feeding platform, a timing mechanism and a pressure claw platform, a synchronous motor is fixedly installed on one side of the base, the feeding platform is arranged on the side above the base close to the synchronous motor, a feeding mechanism is arranged on the top of the feeding platform, the pressure claw platform is arranged on the side above the base away from the synchronous motor, the timing mechanism is arranged between the feeding platform and the pressure claw platform, and a cam synchronization shaft is fixedly installed on the output end of the synchronous motor.

[0006] Preferably, the feeding platform includes a first guide frame, a first cam, a first transmission rod, a mounting plate, a first transmission roller and a first roller groove; the bottom of the first guide frame is fixedly mounted on the upper surface of the base; the first cam is eccentrically fixedly mounted on the cam synchronization shaft; the first transmission rod is slidingly connected to the top of the first guide frame; the mounting plate is fixedly mounted on the top of the first transmission rod; the first transmission roller is rotationally connected to the bottom of the first transmission rod; the first roller groove is opened on the circumferential surface of the first cam; the first roller groove is rollingly connected to the first transmission roller; the feeding mechanism is arranged on the top of the mounting plate; and the timing mechanism is arranged on the side of the first cam away from the synchronous motor.

[0007] Preferably, the timing mechanism includes a timing synchronization disk, a through hole and a photoelectric switch. The timing synchronization disk is fixedly installed coaxially with the cam synchronization shaft. The through hole is opened at the timing synchronization disk near the outer peripheral surface. The photoelectric switch is fixedly installed on the upper surface of the base. The photoelectric switch and the timing synchronization disk are arranged in a non-contact manner. The pressure claw platform is arranged on the side of the timing synchronization disk away from the synchronous motor.

[0008] Preferably, the pressing claw platform includes a second guide frame, a second cam, a second transmission rod, a platform plate, a second transmission roller and a second roller groove; the bottom of the second guide frame is fixedly mounted on the upper surface of the base; the second cam is eccentrically fixedly mounted on the cam synchronization shaft; the second transmission rod is slidingly connected to the top of the second guide frame; the platform plate is fixedly mounted on the top of the second transmission rod; the second transmission roller is rotatably connected to the bottom of the second transmission rod; the second roller groove is opened on the circumferential surface of the second cam; and the second roller groove is rollingly connected to the second transmission roller.

[0009] Preferably, the feeding mechanism includes a driving motor, a connecting frame, a screw rod, a slider, a guide rod and a crochet hook. The driving motor is fixedly mounted on the top of the mounting plate, the bottom of the connecting frame is fixedly connected to the top of the mounting plate, one end of the screw rod is fixedly mounted on the output end of the driving motor, the middle part of the slider is threadedly connected to the screw rod, both ends of the guide rod are fixedly mounted on the connecting frame, the guide rod is slidably connected to the top of the slider, and the crochet hook is fixedly mounted on the bottom of the slider.

[0010] Preferably, the driving motor is a servo motor driven by a servo driver, the servo driver has built-in repetitive motion parameters, and the synchronous motor is an asynchronous drag motor driven by a frequency converter.

[0011] Preferably, the eccentric angle phase difference between the first cam and the second cam is ninety degrees, and the eccentric angle phase difference between the through hole and the first cam is thirty degrees.

[0012] Preferably, the first cam and the second cam are completely the same in size, and the width and depth of the first roller groove and the second roller groove formed on the outer circumferential surfaces of the first cam and the second cam are completely the same.

[0013] Preferably, the widths of the first transmission roller and the second transmission roller are the same as the widths of the first roller groove and the second roller groove, and the sizes of the first transmission roller and the second transmission roller are exactly the same.

[0014] Preferably, a groove is provided on the top of the photoelectric switch, the bottom of the timing synchronization disk is located inside the groove, and the through hole is located inside the groove when it rotates to the bottom of the timing synchronization disk.

[0015] Beneficial Effects

[0016] Compared with the prior art, the present invention provides a cam synchronization device for a power semiconductor ultrasonic aluminum wire bonding machine, which has the following beneficial effects:

[0017] 1. The cam synchronization device of a power semiconductor ultrasonic aluminum wire bonding machine drives the cam synchronization shaft to rotate through a synchronous motor, so that the first cam, the timing synchronization plate and the second cam fixedly mounted on the cam synchronization shaft rotate at the same time. The first cam and the second cam with an eccentric angle phase difference regularly drive the first transmission rod and the second transmission rod to move up and down respectively, thereby driving the feeding mechanism on the top of the mounting plate and the material placed on the top of the platform plate to press and move. The cam structure is used for action connection synchronization, the system structure is simple, the structure is reliable, the synchronization performance is stable, the synchronization reliability is effectively improved, the system complexity is reduced, and the consistency of product production quality is improved.

[0018] 2. A cam synchronization device of a power semiconductor ultrasonic aluminum wire bonding machine, by setting a timing mechanism between a feed platform and a pressure claw platform, a timing synchronization disk fixedly mounted on a cam synchronization shaft rotates simultaneously with a first cam and a second cam, with the rotation of the timing synchronization disk, a through hole regularly enters a groove of a photoelectric switch, thereby triggering the photoelectric switch to start the feed mechanism, and the start and stop and forward and reverse rotation of a driving motor in the feed mechanism are controlled by the timing synchronization disk and the photoelectric switch, so that the feed mechanism can more accurately cooperate with the feed platform and the pressure claw platform to work.

[0019] 3. The cam synchronization device of a power semiconductor ultrasonic aluminum wire bonding machine controls the forward and reverse rotation of the driving motor through the photoelectric switch in the timing mechanism. When the driving motor rotates forward, the mounting plate is in a state of being lifted by the first cam, and the slider moves to one side without load. When the driving motor reverses, the mounting plate falls, and the material on the platform plate is driven by the hook at the bottom of the slider to drag forward one unit. The synchronous motor and the cam synchronous shaft drive the feeding platform, timing mechanism, pressure claw platform and feeding mechanism to cooperate precisely. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 The structure diagram of the feeding platform and the pressing claw platform of the present invention is shown in FIG. Figure 1 ;

[0022] Figure 3 The structure diagram of the feeding platform, timing mechanism and pressing claw platform of the present invention is shown in FIG. Figure 1 ;

[0023] Figure 4 The structure diagram of the feeding platform, timing mechanism and pressing claw platform of the present invention is shown in FIG. Figure 2 ;

[0024] Figure 5 It is a partial structural schematic diagram of the feeding platform and the pressing claw platform of the present invention;

[0025] Figure 6 The structure diagram of the feeding mechanism of the present invention is shown in FIG. Figure 1 ;

[0026] Figure 7 The structure diagram of the feeding mechanism of the present invention is shown in FIG. Figure 2 ;

[0027] Figure 8 For the present invention Figure 7 Enlarged view of point A in the middle.

[0028] In the figure: 1. base; 2. synchronous motor; 3. cam synchronization shaft; 4. feeding platform; 41. first guide frame; 42. first cam; 43. first transmission rod; 44. mounting plate; 45. first transmission roller; 46. first roller groove; 5. timing mechanism; 51. timing synchronization disk; 52. through hole; 53. photoelectric switch; 6. pressure claw platform; 61. second guide frame; 62. second cam; 63. second transmission rod; 64. platform plate; 65. second transmission roller; 66. second roller groove; 7. feeding mechanism; 71. driving motor; 72. connecting frame; 73. screw rod; 74. slider; 75. guide rod; 76. hook needle. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-8 A cam synchronization device of a power semiconductor ultrasonic aluminum wire bonding machine includes a base 1, a feeding platform 4, a timing mechanism 5 and a pressure claw platform 6. A synchronous motor 2 is fixedly installed on one side of the base 1. The feeding platform 4 is arranged on the side above the base 1 close to the synchronous motor 2. A feeding mechanism 7 is arranged on the top of the feeding platform 4. The pressure claw platform 6 is arranged on the side above the base 1 away from the synchronous motor 2. The timing mechanism 5 is arranged between the feeding platform 4 and the pressure claw platform 6. A cam synchronization shaft 3 is fixedly installed on the output end of the synchronous motor 2.

[0031] As an embodiment of the present invention, the feeding platform 4 includes a first guide frame 41, a first cam 42, a first transmission rod 43, a mounting plate 44, a first transmission roller 45 and a first roller groove 46. The bottom of the first guide frame 41 is fixedly installed on the upper surface of the base 1, the first cam 42 is eccentrically fixedly installed on the cam synchronization shaft 3, the first transmission rod 43 is slidably connected to the top of the first guide frame 41, the mounting plate 44 is fixedly installed on the top of the first transmission rod 43, the first transmission roller 45 is rotatably connected to the bottom of the first transmission rod 43, the first roller groove 46 is opened on the circumferential surface of the first cam 42, the first roller groove 46 is rollingly connected to the first transmission roller 45, the feeding mechanism 7 is arranged on the top of the mounting plate 44, and the timing mechanism 5 is arranged on the side of the first cam 42 away from the synchronous motor 2.

[0032] As an embodiment of the present invention, the timing mechanism 5 includes a timing synchronization disk 51, a through hole 52 and a photoelectric switch 53. The timing synchronization disk 51 is fixedly installed coaxially with the cam synchronization shaft 3. The through hole 52 is opened near the outer peripheral surface of the timing synchronization disk 51. The photoelectric switch 53 is fixedly installed on the upper surface of the base 1. The photoelectric switch 53 and the timing synchronization disk 51 are non-contact arranged. The pressure claw platform 6 is arranged on the side of the timing synchronization disk 51 away from the synchronous motor 2. By arranging the timing mechanism 5 between the feeding platform 4 and the pressure claw platform 6, the timing synchronization disk 51 fixedly installed on the cam synchronization shaft 3 rotates simultaneously with the first cam 42 and the second cam 62. As the timing synchronization disk 51 rotates, the through hole 52 regularly enters the groove of the photoelectric switch 53, thereby triggering the photoelectric switch 53 to start the feeding mechanism 7. The start and stop and forward and reverse rotation of the driving motor 71 in the feeding mechanism 7 are controlled by the timing synchronization disk 51 and the photoelectric switch 53, so that the feeding mechanism 7 can cooperate with the feeding platform 4 and the pressure claw platform 6 to work more accurately.

[0033] As an embodiment of the present invention, the pressing claw platform 6 includes a second guide frame 61, a second cam 62, a second transmission rod 63, a platform plate 64, a second transmission roller 65 and a second roller groove 66. The bottom of the second guide frame 61 is fixedly installed on the upper surface of the base 1, the second cam 62 is eccentrically fixedly installed on the cam synchronization shaft 3, the second transmission rod 63 is slidably connected to the top of the second guide frame 61, the platform plate 64 is fixedly installed on the top of the second transmission rod 63, the second transmission roller 65 is rotatably connected to the bottom of the second transmission rod 63, the second roller groove 66 is opened on the circumferential surface of the second cam 62, and the second roller groove 66 is rollingly connected to the second transmission roller 65 The cam synchronization shaft 3 is driven to rotate by the synchronous motor 2, so that the first cam 42, the timing synchronization plate 51 and the second cam 62 fixedly mounted on the cam synchronization shaft 3 rotate at the same time, and the first cam 42 and the second cam 62 with an eccentric angle phase difference regularly drive the first transmission rod 43 and the second transmission rod 63 to move up and down respectively, thereby driving the feeding mechanism 7 on the top of the mounting plate 44 and the material placed on the top of the platform plate 64 to press and move. By adopting the cam structure for action connection synchronization, the system structure is simple, the structure is reliable, the synchronization performance is stable, the synchronization reliability is effectively improved, the system complexity is reduced, and the consistency of product production quality is improved.

[0034] As an embodiment of the present invention, the feeding mechanism 7 includes a driving motor 71, a connecting frame 72, a screw rod 73, a slider 74, a guide rod 75 and a hook 76. The driving motor 71 is fixedly mounted on the top of the mounting plate 44, the bottom of the connecting frame 72 is fixedly connected to the top of the mounting plate 44, one end of the screw rod 73 is fixedly mounted on the output end of the driving motor 71, the middle part of the slider 74 is threadedly connected to the screw rod 73, both ends of the guide rod 75 are fixedly mounted on the connecting frame 72, the guide rod 75 is slidably connected to the top of the slider 74, and the hook 76 is fixedly mounted on the top of the mounting plate 44. 6 is fixedly installed at the bottom of the slider 74, and the forward and reverse rotation of the drive motor 71 is controlled by the photoelectric switch 53 in the timing mechanism 5. When the drive motor 71 rotates forward, the mounting plate 44 is in a state of being lifted by the first cam 42, and the slider 74 moves to one side without load. When the drive motor 71 reverses, the mounting plate 44 falls, and the material on the platform plate 64 is driven by the hook 76 at the bottom of the slider 74 to drag forward one unit, and the synchronous motor 2 and the cam synchronous shaft 3 drive the feeding platform 4, the timing mechanism 5, the pressure claw platform 6 and the feeding mechanism 7 to cooperate accurately.

[0035] As an embodiment of the present invention, the driving motor 71 is a servo motor driven by a servo driver, the servo driver has built-in repetitive motion parameters, and the synchronous motor 2 is an asynchronous traction motor driven by a frequency converter.

[0036] As an embodiment of the present invention, the first cam 42 lags behind the second cam 62 by ninety degrees in eccentric angle phase difference, and the through hole 52 lags behind the first cam 42 by thirty degrees in eccentric angle phase difference.

[0037] As an embodiment of the present invention, the first cam 42 and the second cam 62 have the same size, and the first roller groove 46 and the second roller groove 66 formed on the outer circumference of the first cam 42 and the second cam 62 have the same width and depth.

[0038] As an implementation manner of the present invention, the widths of the first transmission roller 45 and the second transmission roller 65 are the same as the widths of the first roller groove 46 and the second roller groove 66 , and the sizes of the first transmission roller 45 and the second transmission roller 65 are exactly the same.

[0039] As an embodiment of the present invention, a groove is provided on the top of the photoelectric switch 53 , the bottom of the timing synchronization disk 51 is located inside the groove, and the through hole 52 is located inside the groove when it rotates to the bottom of the timing synchronization disk 51 .

[0040] It should be noted that when in use, the synchronous motor starts and begins to rotate, and the frequency converter stabilizes the speed to drive the cam synchronous shaft to rotate. The first cam, the timing synchronous disk, and the second cam fixedly installed on the cam synchronous shaft rotate synchronously. When the second cam is at the highest point, the second cam lifts the second transmission rod, thereby lifting the platform plate, and the material feeding channel is unblocked. After the cam synchronous shaft rotates a certain angle, the first cam is at the highest point and lifts the first transmission rod and the mounting plate, and the feeding mechanism is lifted together with the mounting plate. After the cam synchronous shaft rotates a certain angle again, the through hole on the timing synchronous disk turns to the photoelectric switch, and the photoelectric switch detects the through hole of the timing synchronous disk and triggers a signal Start the drive motor, and the drive motor stops after running a certain number of circles in the forward direction (the number of circles is related to the feed amount). When the cam synchronous shaft rotates to one hundred and eighty degrees, the feed platform and the feed mechanism are gradually lowered. After the cam synchronous shaft rotates a certain angle again, the photoelectric switch detects the through hole of the timing synchronous disk for the second time, and the trigger signal starts the drive motor. The drive motor stops after running a certain number of circles in the reverse direction. The material on the platform plate is dragged forward one unit by the hook at the bottom of the slider. When the cam synchronous shaft rotates a certain angle again, the platform plate in the pressure claw platform is lowered, and the material to be welded is pressed, and then welding is carried out. After welding is completed, the second cam returns to the highest point to continue to complete the material feeding action.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cam synchronization device for a power semiconductor ultrasonic aluminum wire bonding machine, comprising a base (1), a feeding platform (4), a timing mechanism (5) and a pressure claw platform (6), characterized in that: A synchronous motor (2) is fixedly mounted on one side of the base (1); the feeding platform (4) is arranged on a side above the base (1) close to the synchronous motor (2); a feeding mechanism (7) is arranged on the top of the feeding platform (4); the pressing claw platform (6) is arranged on a side above the base (1) away from the synchronous motor (2); the timing mechanism (5) is arranged between the feeding platform (4) and the pressing claw platform (6); and a cam synchronous shaft (3) is fixedly mounted on the output end of the synchronous motor (2); The feeding platform (4) comprises a first guide frame (41), a first cam (42), a first transmission rod (43), and a mounting plate (44); the first transmission rod (43) at the bottom of the mounting plate (44) slides through the first guide frame (41) and is slidably connected to the first cam (42); and the feeding mechanism (7) is arranged on the top of the mounting plate (44); The timing mechanism (5) comprises a timing synchronizing disk (51) with a through hole (52) and a photoelectric switch (53), wherein the photoelectric switch (53) is fixedly mounted on the upper surface of the base (1); The pressing claw platform (6) comprises a second guide frame (61), a second cam (62), a second transmission rod (63), and a platform plate (64); the second transmission rod (63) at the bottom of the platform plate (64) slides through the second guide frame (61) and is then slidably connected to the second cam (62); The first cam (42) and the second cam (62) are respectively eccentrically fixedly mounted on the cam synchronization shaft (3); the timing synchronization plate (51) is coaxially fixedly mounted on the cam synchronization shaft (3); the first cam (42) has an eccentric angle phase difference that lags behind the second cam (62), and the through hole (52) has an eccentric angle phase difference that lags behind the first cam (42).

2. The cam synchronization device of a power semiconductor ultrasonic aluminum wire bonding machine according to claim 1, characterized in that: The feeding platform (4) further comprises a first transmission roller (45) and a first roller groove (46); the bottom of the first guide frame (41) is fixedly mounted on the upper surface of the base (1); the first transmission rod (43) is slidably connected to the top of the first guide frame (41); the mounting plate (44) is fixedly mounted on the top of the first transmission rod (43); the first transmission roller (45) is rotatably connected to the bottom of the first transmission rod (43); the first roller groove (46) is provided on the circumferential surface of the first cam (42); the first roller groove (46) is rollingly connected to the first transmission roller (45); and the timing mechanism (5) is arranged on a side of the first cam (42) away from the synchronous motor (2).

3. The cam synchronization device of a power semiconductor ultrasonic aluminum wire bonding machine according to claim 2, characterized in that: The through hole (52) is provided near the outer peripheral surface of the timing synchronization disk (51), the photoelectric switch (53) is arranged in a non-contact manner with the timing synchronization disk (51), and the pressure claw platform (6) is arranged on a side of the timing synchronization disk (51) away from the synchronous motor (2).

4. The cam synchronization device of a power semiconductor ultrasonic aluminum wire bonding machine according to claim 3 is characterized in that: The pressing claw platform (6) also includes a second transmission roller (65) and a second roller groove (66); the bottom of the second guide frame (61) is fixedly mounted on the upper surface of the base (1); the second transmission rod (63) is slidably connected to the top of the second guide frame (61); the second transmission roller (65) is rotationally connected to the bottom of the second transmission rod (63); the second roller groove (66) is provided on the circumferential surface of the second cam (62); and the second roller groove (66) is rollingly connected to the second transmission roller (65).

5. The cam synchronization device of a power semiconductor ultrasonic aluminum wire bonding machine according to claim 2, characterized in that: The feeding mechanism (7) comprises a driving motor (71), a connecting frame (72), a screw rod (73), a slider (74), a guide rod (75) and a hook needle (76); the driving motor (71) is fixedly mounted on the top of the mounting plate (44); the bottom of the connecting frame (72) is fixedly connected to the top of the mounting plate (44); one end of the screw rod (73) is fixedly mounted on the output end of the driving motor (71); the middle part of the slider (74) is threadedly connected to the screw rod (73); both ends of the guide rod (75) are fixedly mounted on the connecting frame (72); the guide rod (75) is slidably connected to the top of the slider (74); and the hook needle (76) is fixedly mounted on the bottom of the slider (74).

6. The cam synchronization device of a power semiconductor ultrasonic aluminum wire bonding machine according to claim 5, characterized in that: The driving motor (71) is a servo motor driven by a servo driver, the servo driver has built-in repetitive motion parameters, and the synchronous motor (2) is an asynchronous traction motor driven by a frequency converter.

7. The cam synchronization device of a power semiconductor ultrasonic aluminum wire bonding machine according to claim 4, characterized in that: The first cam (42) lags behind the second cam (62) by ninety degrees in eccentric angle phase difference, and the through hole (52) lags behind the first cam (42) by thirty degrees in eccentric angle phase difference.

8. The cam synchronization device of a power semiconductor ultrasonic aluminum wire bonding machine according to claim 7, characterized in that: The first cam (42) and the second cam (62) are of exactly the same size, and the first roller groove (46) and the second roller groove (66) formed on the outer circumference of the first cam (42) and the second cam (62) are of exactly the same width and depth.

9. The cam synchronization device of a power semiconductor ultrasonic aluminum wire bonding machine according to claim 4, characterized in that: The width of the first transmission roller (45) and the second transmission roller (65) is the same as the width of the first roller groove (46) and the second roller groove (66), and the first transmission roller (45) and the second transmission roller (65) are exactly the same in size.

10. The cam synchronization device of a power semiconductor ultrasonic aluminum wire bonding machine according to claim 3, characterized in that: The top of the photoelectric switch (53) is provided with a groove, the bottom of the timing synchronization disk (51) is located inside the groove, and the through hole (52) is located inside the groove when it rotates to the bottom of the timing synchronization disk (51).

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