Ultrasonic welding jig for power terminal of IGBT (Insulated Gate Bipolar Translator) module

Abstract

The utility model discloses an ultrasonic welding jig for a power terminal of an IGBT (Insulated Gate Bipolar Translator) module, relates to the technical field of processing of power semiconductor devices, and aims to solve the problems that the power terminal still needs to be manually positioned and placed, so that the stable placement of the power terminal cannot be ensured, and the accurate butt joint of the power terminal is possibly influenced. According to the technical scheme, the device comprises a bottom plate, a ceramic copper-clad plate positioned and placed on the bottom plate, two supporting blocks fixedly arranged on the bottom plate, a supporting plate positioned and placed on the two supporting blocks, a power terminal positioned and placed on the supporting plate, a cover plate fixed on the supporting plate through a bolt, and a clamping mechanism; the clamping mechanism comprises a batten, a motor is fixedly installed on the batten, a transverse plate is fixedly connected to an output shaft of the motor, and two shifting shafts are welded to the transverse plate, so that accurate butt joint between the power terminal and the corresponding pin on the ceramic copper-clad plate can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of power semiconductor device processing, in particular to an ultrasonic welding jig for power terminals of an IGBT module. Background Art

[0002] Ultrasonic welding uses high-frequency vibration waves to transmit to the surfaces of two objects to be welded. Under pressure, the two surfaces of the objects rub against each other to form a fusion between the molecular layers.

[0003] After searching, the utility model patent with authorization announcement number CN211276957U discloses an ultrasonic welding jig for IGBT module power terminals. The utility model is easy to assemble and disassemble, and can achieve precise docking of the power terminals with the corresponding pins on the ceramic copper-clad board during the ultrasonic welding process of the IGBT module. Combined with precision machining technology, the positioning accuracy can be controlled within 0.1mm; while improving the welding quality, it can also improve the welding efficiency.

[0004] However, there are still some shortcomings in the above design. In the above design, the positioning and placement of the power terminals still need to be performed manually, which makes it impossible to ensure the stable placement of the power terminals, which may affect their precise docking. Utility Model Content

[0005] The purpose of the utility model is to solve the problem that the positioning and placement of power terminals still need to be done manually, which leads to the inability to ensure the stable placement of the power terminals, which may affect the precise docking thereof, and proposes an ultrasonic welding jig for the power terminals of an IGBT module.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An ultrasonic welding jig for power terminals of an IGBT module, comprising:

[0008] A base plate, a ceramic copper-clad plate positioned on the base plate, two support blocks fixedly arranged on the base plate, a support plate positioned on the two support blocks, a power terminal positioned on the support plate, a cover plate fixed on the support plate by bolts, and a clamping mechanism;

[0009] The clamping mechanism includes a strip plate, a motor is fixedly mounted on the strip plate, a cross plate is fixedly connected to the output shaft of the motor, two shift shafts are welded on the cross plate, sleeve plates are movably sleeved on the outer sides of the two shift shafts, U-shaped rods are fixedly mounted on the two sleeve plates, and clamps are fixedly mounted on the ends of the two U-shaped rods away from the corresponding sleeve plates.

[0010] In a preferred embodiment, a support plate is fixedly mounted on the bottom plate, an electric telescopic rod is fixedly mounted on the support plate, and a piston shaft of the electric telescopic rod is fixedly connected to the strip plate.

[0011] In a preferred embodiment, a mounting bracket is fixedly mounted on the top side of the strip, and the motor is fixedly mounted on the strip via the mounting bracket.

[0012] In a preferred embodiment, two limit shafts are fixedly mounted on both sides of the strip plate, and the two sleeve plates are slidably sleeved on the outer sides of the two corresponding limit shafts.

[0013] In a preferred embodiment, the two sleeve plates are each provided with a rectangular opening, and the two shifting shafts are in movably contact with the inner walls of the corresponding rectangular openings.

[0014] In a preferred embodiment, anti-slip pads are fixedly installed on the adjacent sides of the two clamping plates.

[0015] In the utility model, the ultrasonic welding jig for power terminals of an IGBT module can facilitate the stable and accurate placement of the power terminals through the cooperation of a support plate, an electric telescopic rod, a strip plate, a motor, a strip plate, two dial shafts, two sleeve plates, two U-shaped rods, two clamping plates and two anti-slip pads, so that the power terminals can be accurately connected with the corresponding pins on the ceramic copper-clad board;

[0016] The utility model has reasonable design and can facilitate stable and accurate placement of the power terminal, so that the power terminal can be accurately connected with the corresponding pins on the ceramic copper clad board. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional structural schematic diagram of an ultrasonic welding jig for power terminals of an IGBT module proposed by the utility model;

[0018] Figure 2 This is a three-dimensional structural schematic diagram of an ultrasonic welding jig for power terminals of an IGBT module proposed by the utility model;

[0019] Figure 3 The utility model is a three-dimensional structural schematic diagram of a clamping mechanism of an ultrasonic welding jig for power terminals of an IGBT module.

[0020] In the figure: 1. bottom plate; 2. ceramic copper clad plate; 3. support block; 4. support plate; 5. power terminal; 6. cover plate; 7. support plate; 8. electric telescopic rod; 9. strip plate; 10. motor; 11. cross plate; 12. dial shaft; 13. sleeve plate; 14. rectangular opening; 15. limit shaft; 16. U-shaped rod; 17. clamping plate; 18. anti-slip pad. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] Reference Figure 1-3 , an embodiment provided by this scheme: an ultrasonic welding fixture for power terminals of an IGBT module, comprising:

[0023] A base plate 1, a ceramic copper-clad plate 2 positioned on the base plate 1, two support blocks 3 fixedly arranged on the base plate 1, a support plate 4 positioned on the two support blocks 3, a power terminal 5 positioned on the support plate 4, a cover plate 6 fixed on the support plate 4 by bolts, and a clamping mechanism;

[0024] The clamping mechanism includes a strip plate 9, on which a motor 10 is fixedly mounted, a cross plate 11 is fixedly connected to the output shaft of the motor 10, two shift shafts 12 are welded to the cross plate 11, and sleeve plates 13 are movably sleeved on the outer sides of the two shift shafts 12, and U-shaped rods 16 are fixedly mounted on the two sleeve plates 13, and a clamping plate 17 is fixedly mounted on the ends of the two U-shaped rods 16 away from the corresponding sleeve plates 13.

[0025] Reference Figure 1 In this embodiment, a support plate 7 is fixedly mounted on the bottom plate 1, an electric telescopic rod 8 is fixedly mounted on the support plate 7, and a piston shaft of the electric telescopic rod 8 is fixedly connected to a strip plate 9, which can conveniently drive the lifting and lowering of the clamping mechanism.

[0026] Reference Figure 2 In this embodiment, a mounting frame is fixedly mounted on the top side of the strip plate 9, and the motor 10 is fixedly mounted on the strip plate 9 through the mounting frame, which can facilitate the installation and fixation of the motor 10.

[0027] Reference Figure 3 In this embodiment, two limit shafts 15 are fixedly installed on both sides of the strip plate 9, and the two sleeve plates 13 are slidably sleeved on the outer sides of the two corresponding limit shafts 15, which can play a limiting role for the two sleeve plates 13.

[0028] Reference Figure 3 In this embodiment, the two sleeve plates 13 are both provided with rectangular openings 14 , and the two shift shafts 12 are in active contact with the inner walls of the corresponding rectangular openings 14 , so that the sleeve plates 13 can be conveniently sleeved on the outer sides of the shift shafts 12 .

[0029] Reference Figure 3 In this embodiment, anti-skid pads 18 are fixedly installed on the adjacent sides of the two clamping plates 17, which can prevent slipping and falling off during the clamping process.

[0030] Working principle: first, the driving motor 10 can be used to drive the cross plate 11 to rotate, so that when the cross plate 11 rotates, the two shifting shafts 12 can shift the two sets of plates 13 to move closer to each other, so that while the two sets of plates 13 move closer to each other, the two U-shaped rods 16 can drive the two clamping plates 17 to move closer to each other to clamp the cover plate 6, and the anti-skid pad 18 can play an anti-skid and anti-slip effect during the clamping process, and then the electric telescopic rod 8 can be driven to drive the strip plate 9 to move downward, so that during the downward movement, the power terminal 5 can be driven to move downward stably by clamping the cover plate 6 to accurately dock with the corresponding pins on the ceramic copper clad board 2.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An ultrasonic welding jig for IGBT module power terminals, characterized in that: include: A base plate (1), a ceramic copper-clad plate (2) positioned on the base plate (1), two support blocks (3) fixedly arranged on the base plate (1), a support plate (4) positioned on the two support blocks (3), a power terminal (5) positioned on the support plate (4), a cover plate (6) fixed on the support plate (4) by bolts, and a clamping mechanism; The clamping mechanism comprises a strip plate (9), a motor (10) is fixedly mounted on the strip plate (9), a transverse plate (11) is fixedly connected to the output shaft of the motor (10), two shifting shafts (12) are welded to the transverse plate (11), sleeve plates (13) are movably sleeved on the outer sides of the two shifting shafts (12), U-shaped rods (16) are fixedly mounted on the two sleeve plates (13), and clamp plates (17) are fixedly mounted on the ends of the two U-shaped rods (16) away from the corresponding sleeve plates (13).

2. The ultrasonic welding jig for power terminals of an IGBT module according to claim 1, characterized in that: A support plate (7) is fixedly mounted on the bottom plate (1), an electric telescopic rod (8) is fixedly mounted on the support plate (7), and a piston shaft of the electric telescopic rod (8) is fixedly connected to the strip plate (9).

3. The ultrasonic welding jig for power terminals of an IGBT module according to claim 1, characterized in that: A mounting frame is fixedly mounted on the top side of the strip board (9), and the motor (10) is fixedly mounted on the strip board (9) via the mounting frame.

4. The ultrasonic welding jig for power terminals of an IGBT module according to claim 1, characterized in that: Two limiting shafts (15) are fixedly mounted on both sides of the strip plate (9), and the two sleeve plates (13) are slidably sleeved on the outer sides of the two corresponding limiting shafts (15).

5. The ultrasonic welding jig for power terminals of an IGBT module according to claim 1, characterized in that: The two sleeve plates (13) are each provided with a rectangular opening (14), and the two shifting shafts (12) are in active contact with the inner walls of the corresponding rectangular openings (14).

6. The ultrasonic welding jig for power terminals of an IGBT module according to claim 1, characterized in that: An anti-slip pad (18) is fixedly mounted on one side of the two clamping plates (17) that are close to each other.

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