IGBT module pin straightening tool and its working method

Abstract

This invention belongs to the field of conductive connection technology for IGBT modules, specifically relating to a pin insertion machine for inserting pins into IGBT modules, and more particularly to a pin insertion machine for straightening IGBT module pins and its working method. The pin insertion machine for straightening IGBT module pins includes: a worktable; a rotating platform; multiple pin insertion fixtures; and a feeding mechanism. The pin insertion fixture includes: a first gripping head and a second gripping head, the second gripping head being provided with a straightening groove. After the fisheye pin is gripped by the pin insertion fixture, it is straightened within the same fixture and awaits direct insertion into the IGBT module, completely eliminating the risk of secondary bending caused by the need for re-handling and loading of the fisheye pin. The straightening groove provides instant and precise straightening of bent pins, ensuring good straightness and alignment of the fisheye pin during insertion, thereby significantly reducing the risks of poor insertion, cold solder joints, and poor contact, and improving the reliability of electrical connections.

Description

Technical Field

[0001] This invention belongs to the field of conductive connection technology of IGBT modules, specifically relating to a pin insertion machine for inserting pins into IGBT modules, and more particularly to a pin insertion machine for straightening IGBT module pins and its working method. Background Technology

[0002] In the manufacturing process of Insulated Gate Bipolar Transistor (IGBT) modules, accurately and reliably inserting fisheye pins into the substrate or corresponding interface of the IGBT module is a critical step.

[0003] Fish-eye needles are named for the unique fish-eye-like structure at the tip of their needles. This design aims to provide good electrical contact, mechanical fixation, and a certain degree of stress relief.

[0004] In related technologies, when inserting the fisheye pin into the IGBT module, the pin end needs to be clamped by a pin insertion fixture before being inserted into the IGBT module. Therefore, during transportation, the fisheye pin needs to be inserted into a conveyor plate, with the pin end exposed. This loading and transportation process can easily cause the fisheye portion of the pin to bend. During insertion, the bent pin can lead to defects, poor soldering, insufficient insertion depth, or skewed angles, severely affecting the electrical conductivity, current carrying capacity, heat dissipation efficiency, and long-term reliability of the IGBT module. To solve this problem, a separate straightening process is required. However, when the straightened fisheye pin is reloaded and transported, it may be bent again.

[0005] Therefore, how to avoid the bending of the fisheye needle pin tip from affecting the electrical conduction performance of the IGBT module is a technical problem that urgently needs to be solved.

[0006] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Summary of the Invention

[0007] This disclosure provides at least one IGBT module pin straightening machine and its working method.

[0008] In a first aspect, embodiments of this disclosure provide a pin insertion machine for straightening IGBT module pins, comprising:

[0009] Workbench;

[0010] A rotating platform, which is rotatably mounted on the worktable;

[0011] Multiple pin inserters are arranged at circumferential intervals along the rotating platform;

[0012] The feeding mechanism has its end located below one of the pin insertion fixtures and is used to transport the IGBT module.

[0013] A drive mechanism is used to drive the pin insertion tool to grasp and release the fisheye needle;

[0014] The control module is configured to: control the rotating platform to drive the pin insertion fixture to rotate, and control the drive mechanism to insert the fisheye pin insertion end of the pin insertion fixture opposite to the end of the feeding mechanism into the IGBT module.

[0015] The pin insertion tooling includes:

[0016] A mounting plate is disposed on the rotating platform;

[0017] A first gripping head is disposed at the bottom of the mounting plate;

[0018] The second gripper head is rotatably connected to the first gripper head, and the opposite surfaces of the second gripper head and the first gripper head are provided with straightening grooves.

[0019] A rotating cylinder, under the control of the control module, drives the second gripping head to close with the first gripping head, so as to straighten the needle tip of the fisheye needle through the straightening groove.

[0020] In one alternative implementation, the first gripper head includes:

[0021] Two oppositely arranged side plates are located at the bottom of the mounting plate;

[0022] A lifting head is disposed between the two side plates;

[0023] A lifting cylinder is located at the bottom of the mounting plate and is used to drive the lifting head to rise and fall;

[0024] The opposing surfaces of the lifting head and the second gripping head are rough surfaces;

[0025] After the fisheye needle's pin end is straightened by the straightening groove, the control module is further configured to control the lifting cylinder to drive the lifting head to rise and fall, so as to polish the burrs and creases on the surface of the fisheye needle's pin end.

[0026] In one alternative embodiment, a trigger sensor is provided at the top of the straightening groove;

[0027] When the control module controls the lifting cylinder to drive the lifting head to rise and fall, the control module is also configured to receive the trigger signal from the trigger sensor, and when it receives the trigger signal sent by the trigger sensor, control the pin insertion fixture to re-clamp the fisheye needle.

[0028] In one alternative embodiment, the sidewall of the lifting head is provided with a slider;

[0029] The side plate is provided with a sliding groove at the position corresponding to the slider;

[0030] The lifting head is slidably mounted in the slide groove via the slider.

[0031] In one alternative embodiment, the second gripping head is rotatably disposed between the two side plates via a first rotating shaft;

[0032] Furthermore, the first pivot is located in the lower middle part of the first gripping head.

[0033] In one optional implementation, the first pivot is located in the lower middle part of the first gripping head, that is:

[0034] The center point of the first rotating shaft is O;

[0035] The hinge point between the rotating cylinder and the second gripping head is A;

[0036] The center point of the straightening groove is B;

[0037] Furthermore, the distance from point O to point A is L1, and the distance from point O to point B is L2;

[0038] L1 > L2, so as to increase the clamping force between the first gripper head and the second gripper head.

[0039] In one optional embodiment, the bottom of the straightening groove is provided with a notch that communicates with the bottom surface of the second gripping head;

[0040] The bottom of the second gripper head is provided with an elastic part;

[0041] After the second gripping head and the first gripping head are closed, the elastic part abuts against the fisheye needle's locking block.

[0042] In one optional embodiment, the drive mechanism includes a first cylinder and a second cylinder, and the first cylinder and the second cylinder are mounted on the worktable via corresponding outer frames.

[0043] The first cylinder and the second cylinder are respectively positioned above the gripping station and the unloading station of the fisheye needle, and are used to drive the rotating platform to rotate to the corresponding needle insertion fixture for work under the control of the control module.

[0044] In one optional embodiment, an electromagnet is provided at the end of the piston rod of both the first cylinder and the second cylinder.

[0045] The pin insertion fixture also includes:

[0046] A fixed side plate is disposed on the rotating platform, and a permanent magnet is disposed on the top surface of the fixed side plate;

[0047] The mounting plate is L-shaped, and the vertical surface of the mounting plate is slidably mounted on the fixed side plate. The top surface of the horizontal surface of the mounting plate is provided with an adsorption surface.

[0048] In the initial state, the top of the vertical surface of the mounting plate is attracted to the permanent magnet of the fixed side plate; when the fish-eye needle is gripped or released, the control module controls the electromagnet of the corresponding first cylinder or second cylinder to be energized and drive the electromagnet to descend, attract the adsorption surface of the mounting plate, and drive the mounting plate to descend, so as to complete the gripping or releasing of the fish-eye needle.

[0049] Secondly, this disclosure also provides a method for operating a pin insertion machine for straightening IGBT module pins as described above, the method comprising:

[0050] Under the control of the control module, the drive mechanism drives the needle insertion fixture to complete the gripping of the fisheye needle, and the needle end of the fisheye needle is straightened by the straightening groove;

[0051] The rotating platform drives the pin insertion fixture that grabs the fisheye needle to rotate above the IGBT module;

[0052] The control module controls the drive mechanism to drive the pin insertion fixture to insert the fisheye pin's insertion end onto the IGBT module, thus completing the pin insertion.

[0053] The beneficial effects of this invention are that it provides a pin insertion machine and its working method for straightening IGBT module pins. By setting multiple pin insertion fixtures with straightening slots on a rotating platform and working collaboratively under the unified control of a control module, it achieves automated operation of gripping, real-time online straightening, and insertion of fisheye pins. After being gripped by the pin insertion fixture, the fisheye pin is straightened within the same fixture and awaits direct insertion into the IGBT module. This completely eliminates the risk of secondary bending caused by the need for re-handling and loading of the fisheye pin after straightening in traditional straightening methods, fundamentally ensuring the straightness of the pins before insertion, allowing for more precise insertion into the IGBT module. The real-time and precise straightening of bent pins through the straightening slots ensures good straightness and alignment of the fisheye pin during insertion, thereby significantly reducing the risks of poor insertion, cold solder joints, and poor contact, and improving the electrical connection reliability of the IGBT module.

[0054] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0055] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0056] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0057] Figure 1 This is a schematic diagram of the structure of the pin insertion machine for straightening IGBT module pins provided in an embodiment of this disclosure;

[0058] Figure 2 This is a partial structural schematic diagram of the pin insertion tool provided in an embodiment of the present disclosure;

[0059] Figure 3 This is a front view of a portion of the structure of the pin tooling provided in an embodiment of this disclosure;

[0060] Figure 4 This is a top view of a portion of the structure of the pin insertion machine for straightening IGBT module pins provided in an embodiment of this disclosure;

[0061] Figure 5 A schematic diagram of the rotating platform, pin insertion fixture, and drive mechanism provided in the embodiments of this disclosure;

[0062] Figure 6 The electrical control schematic diagram of the pin insertion machine for straightening IGBT module pins provided in this embodiment of the disclosure;

[0063] Figure 7 A flowchart illustrating the working method of the pin insertion machine for straightening IGBT module pins provided in this embodiment of the disclosure.

[0064] In the diagram: 100, workbench; 200, rotating platform; 210, feeding station; 220, gripping station; 300, pin insertion fixture; 310, mounting plate; 311, adsorption surface; 320, first gripping head; 321, side plate; 3211, slide groove; 322, lifting head; 3221, slider; 323, lifting cylinder; 330, second gripping head; 331, straightening groove; 332, trigger sensor; 340, rotating cylinder; 350, first rotating shaft; 360, elastic part; 370, fixed side plate; 371, permanent magnet; 400, feeding mechanism; 500, drive mechanism; 510, first cylinder; 520, second cylinder; 530, electromagnet; 600, fisheye needle; 610, needle end; 620, insertion end; 630, locking block. Detailed Implementation

[0065] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0066] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0067] In this document, when an element or layer is referred to as “located,” “joined to,” “connected to,” “attached to,” or “coupled to” another element or layer, it may be directly located, joined, connected, attached to, or coupled to the other element or layer, or there may be intermediate elements or layers present. Conversely, when an element is referred to as “directly on another element or layer,” “directly joined to,” “directly connected to,” “directly attached to,” or “directly coupled to” another element or layer, there may be no intermediate elements or layers present. Other terms used to describe relationships between elements should be interpreted in a similar manner (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). As used herein, the term “and / or” includes any and all combinations of one or more of the related listed items.

[0068] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify the entire list of elements when following a list of elements, rather than individual elements in the list. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0069] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0070] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0071] Research has revealed that the insertion end of the fisheye pin is prone to bending during loading and transportation. When inserting the pin, the bent pin leads to defects, poor soldering, insufficient insertion depth, or misaligned angles, severely impacting the electrical conductivity, current carrying capacity, heat dissipation efficiency, and long-term reliability of the IGBT module. Adding an extra straightening process requires reloading the fisheye pin for transportation, resulting in secondary bending and compromising its straightness upon insertion into the IGBT module.

[0072] Based on the above research, this disclosure provides a pin insertion machine and its working method for straightening IGBT module pins. Working collaboratively under the unified control of a control module, it automates the gripping, real-time online straightening, and insertion of fisheye pins 600. After being gripped by the pin insertion fixture 300, the fisheye pin 600 is straightened within the same fixture and awaits direct insertion into the IGBT module, completely eliminating the risk of secondary bending caused by the need for re-handling and reloading of the fisheye pin 600 after straightening in traditional straightening methods. Simultaneously, the straightening groove 331 provides real-time and precise straightening of bent pins, ensuring good straightness and alignment of the fisheye pin 600 during insertion, thereby significantly reducing the risks of poor insertion, cold solder joints, and poor contact, and improving the electrical connection reliability of the IGBT module.

[0073] The shortcomings of the above solutions are the result of the inventor's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventor's contribution to this disclosure.

[0074] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0075] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0076] Please see Figure 1 and Figure 2 At least one embodiment provides a pin insertion machine for straightening IGBT module pins, including: a worktable 100; a rotating platform 200 rotatably disposed on the worktable 100; a plurality of pin insertion fixtures 300 spaced apart circumferentially along the rotating platform 200; a feeding mechanism 400, the end of which is disposed below one of the pin insertion fixtures 300 and is used to transport IGBT modules; and a driving mechanism 500 used to drive the pin insertion fixtures 300 to grip and release fisheye pins 600.

[0077] Please see Figure 6The control module is configured to: control the rotating platform 200 to drive the pin insertion fixture 300 to rotate, and control the drive mechanism 500 to insert the insertion end 620 of the fisheye needle 600 onto the IGBT module via the pin insertion fixture 300, which is opposite to the end of the feeding mechanism 400; wherein the pin insertion fixture 300 includes: a mounting plate 310, which is disposed on the rotating platform 200; a first gripping head 320, which is disposed at the bottom of the mounting plate 310; a second gripping head 330, which is rotatably connected to the first gripping head 320, and the opposing surfaces of the second gripping head 330 and the first gripping head 320 are provided with a straightening groove 331; and a rotating cylinder 340, which is used to drive the second gripping head 330 and the first gripping head 320 to close under the control of the control module, so as to straighten the needle end 610 of the fisheye needle 600 through the straightening groove 331.

[0078] By setting multiple insertion fixtures 300 with straightening slots 331 on the rotating platform 200, and working collaboratively under the unified control of the control module, the automated operation of gripping, real-time online straightening, and insertion of fisheye pins 600 is realized. After being gripped by the insertion fixture 300, the fisheye pin 600 is straightened within the same fixture and awaits direct insertion into the IGBT module. This completely eliminates the risk of secondary bending caused by the need for re-handling and loading of the fisheye pin 600 after straightening in the traditional straightening mode, fundamentally ensuring the straightness of the pins before insertion, allowing for more precise insertion into the IGBT module. The straightening slots 331 provide real-time and precise straightening of bent pins, ensuring good straightness and alignment of the fisheye pin 600 during insertion, thereby significantly reducing the risks of poor insertion, cold solder joints, and poor contact, and improving the electrical connection reliability of the IGBT module.

[0079] Please see Figure 2 and Figure 3 The first gripping head 320 includes: two opposing side plates 321 disposed at the bottom of the mounting plate 310; a lifting head 322 disposed between the two side plates 321; and a lifting cylinder 323 disposed at the bottom of the mounting plate 310 and used to drive the lifting head 322 to rise and fall. The opposing surfaces of the lifting head 322 and the second gripping head 330 are rough surfaces. After the needle end 610 of the fisheye needle 600 is straightened by the straightening groove 331, the control module is further configured to control the lifting cylinder 323 to drive the lifting head 322 to rise and fall, so as to polish the burrs and creases on the surface of the needle end 610 of the fisheye needle 600.

[0080] During the grasping of the fisheye needle 600, the rotating cylinder 340 moves along... Figure 3 The movement in the direction indicated by F1 causes the second gripper head 330 to move along... Figure 3Open in the direction shown by F2 to facilitate gripping the fisheye needle 600.

[0081] After straightening the fisheye needle 600 through the straightening groove 331, immediately start the lifting head 322 along... Figure 3 As shown in F3, it rises, and along Figure 3 The reverse downward and reciprocating motion, as shown in F3, polishes the surface of pin 610, eliminating burrs or creases caused by straightening and preventing poor contact due to surface roughness during subsequent insertion.

[0082] Please continue reading. Figure 2 A trigger sensor 332 is provided on the top of the straightening groove 331; when the control module controls the lifting cylinder 323 to drive the lifting head 322 to rise and fall, the control module is also configured to receive the trigger signal of the trigger sensor 332, and when it receives the trigger signal sent by the trigger sensor 332, control the pin insertion fixture 300 to re-clamp the fisheye needle 600.

[0083] The trigger sensor 332 detects the movement of the lifting head 322, which causes the fisheye needle 600 to move. If the trigger signal is abnormal, it indicates that there are too many creases or burrs on the needle end 610 of the fisheye needle 600, and it cannot be used. The control module immediately restarts the grasping process and grasps a new fisheye needle 600, thereby avoiding affecting the use of the subsequent IGBT module.

[0084] Among them, the trigger sensor 332 can be, but is not limited to, a force sensor, a pressure sensor, etc.

[0085] Please continue reading. Figure 3 The lifting head 322 has a slider 3221 on its side wall; a groove 3211 is provided on the side plate 321 corresponding to the slider 3221; the lifting head 322 is slidably disposed in the groove 3211 via the slider 3221. The structure of the slider 3221 and the groove 3211 increases the overall strength of the lifting head 322, thereby providing greater support for the second gripping head 330.

[0086] Please see Figure 2 and Figure 3 The second gripping head 330 is rotatably disposed between the two side plates 321 via a first rotating shaft 350; and the first rotating shaft 350 is located in the lower middle part of the first gripping head 320.

[0087] Specifically, the first rotating shaft 350 is located in the lower middle part of the first gripping head 320, that is: the axis of the first rotating shaft 350 is O; the hinge point between the rotating cylinder 340 and the second gripping head 330 is A; the center point of the straightening groove 331 is B; and the distance from point O to point A is L1, and the distance from point O to point B is L2; ​​L1>L2, so as to improve the clamping force of the first gripping head 320 and the second gripping head 330.

[0088] The arrangement of the lower part of the first rotating shaft 350 (point O) and... Figure 2 The design of the lever ratio L1>L2 is combined to amplify the output force of the rotating cylinder 340 at the straightening groove 331 (point B), thereby providing strong correction for the severely bent fisheye needle 600 and avoiding incomplete straightening due to insufficient clamping force.

[0089] Please see Figure 2 The bottom of the straightening groove 331 is provided with a notch that communicates with the bottom surface of the second gripper head 330; the bottom of the second gripper head 330 is provided with an elastic part 360; after the second gripper head 330 and the first gripper head 320 are closed, the elastic part 360 abuts against the locking block 630 of the fisheye needle 600.

[0090] By providing the elastic part 360, the fisheye needle 600 is buffered when it moves up and down with the lifting head 322, thereby increasing the friction between the fisheye needle 600 and the rough surface of the first gripping head 320.

[0091] Please see Figure 4 and Figure 5 The driving mechanism 500 includes a first cylinder 510 and a second cylinder 520, and the first cylinder 510 and the second cylinder 520 are mounted on the workbench 100 through corresponding outer frames; the first cylinder 510 and the second cylinder 520 are respectively positioned above the gripping station 220 and the unloading station 210 of the fisheye needle 600, and are used to drive the rotating platform 200 to rotate to the corresponding station's needle insertion fixture 300 for operation under the control of the control module.

[0092] Specifically, electromagnets 530 are provided at the ends of the piston rods of the first cylinder 510 and the second cylinder 520; the needle insertion fixture 300 further includes: a fixed side plate 370, which is disposed on the rotating platform 200, and a permanent magnet 371 is provided on the top surface of the fixed side plate 370; the mounting plate 310 is L-shaped, and the vertical surface of the mounting plate 310 is slidably disposed on the fixed side plate, and an adsorption surface 311 is provided on the top surface of the horizontal surface of the mounting plate 310; in the initial state, the top of the vertical surface of the mounting plate 310 is attracted to the permanent magnet 371 of the fixed side plate 370; when gripping or releasing the fish-eye needle 600, the control module controls the corresponding electromagnet 530 of the first cylinder 510 or the second cylinder 520 to be energized, and drives the electromagnet 530 to descend, attracting the adsorption surface 311 of the mounting plate 310, and driving the mounting plate 310 to descend, so as to complete the gripping or releasing of the fish-eye needle 600.

[0093] The design of separating the first cylinder 510 and the second cylinder 520 from the rotating platform 200, combined with the magnetic drive method, reduces the load on the rotating platform 200, thereby allowing for the installation of more pin insertion fixtures 300 to improve the overall efficiency of the pin insertion.

[0094] Please see Figure 7 At least one embodiment also provides a method of operation for a pin insertion machine used for straightening IGBT module pins as described above, the method comprising:

[0095] S110: Under the control of the control module, the drive mechanism 500 drives the pin insertion fixture 300 to complete the gripping of the fisheye needle 600, and the straightening groove 331 straightens the needle end 610 of the fisheye needle 600.

[0096] S120: The rotating platform 200 drives the pin insertion fixture 300 that grabs the fisheye needle 600 to rotate above the IGBT module;

[0097] S130: The control module controls the drive mechanism 500 to drive the pin insertion fixture 300 to insert the insertion end 620 of the fisheye pin 600 onto the IGBT module, thus completing the pin insertion.

[0098] In summary, this invention provides an IGBT module pin straightening machine and its working method. The IGBT module pin straightening machine utilizes multiple pin insertion fixtures 300 with straightening slots 331 set on a rotating platform 200. These fixtures work collaboratively under the unified control of a control module, automating the gripping, real-time online straightening, and insertion of fisheye pins 600. After being gripped by the pin insertion fixtures 300, the fisheye pin 600 is straightened within the same fixture and awaits direct insertion into the IGBT module. This completely eliminates the risk of secondary bending caused by the need for re-handling and reloading of the fisheye pin 600 after straightening in traditional straightening methods, fundamentally ensuring the straightness of the pins before insertion and allowing for more precise insertion into the IGBT module. By using the straightening groove 331 to straighten the bent pins instantly and accurately, the fisheye pin 600 is ensured to have good straightness and alignment during insertion, thereby significantly reducing the risks of poor insertion, cold solder joints, and poor contact, and improving the electrical connection reliability of the IGBT module.

[0099] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0100] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as a second element, component, region, layer, or segment.

[0101] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0102] In the above discussion, unless otherwise stated, when used to describe numerical values, the terms “about,” “approximately,” “basically,” etc., indicate a change of + / - 10% in that value.

[0103] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A pin insertion machine for straightening IGBT module pins, characterized in that, include: Workbench (100); A rotating platform (200) is rotatably mounted on the worktable (100); Multiple pin fixtures (300) are arranged at circumferential intervals along the rotating platform (200); The feeding mechanism (400) has its end located below one of the pin insertion fixtures (300) and is used to transport IGBT modules; A drive mechanism (500) is used to drive the pin insertion fixture (300) to grip and release the fisheye needle (600); The control module is configured to: control the rotating platform (200) to drive the pin insertion fixture (300) to rotate, and control the drive mechanism (500) to insert the insertion end (620) of the fisheye needle (600) into the IGBT module through the pin insertion fixture (300) which is opposite to the end of the feeding mechanism (400); The pin insertion fixture (300) includes: Mounting plate (310) is disposed on the rotating platform (200); A first gripper (320) is disposed at the bottom of the mounting plate (310); The second gripper (330) is rotatably connected to the first gripper (320), and the opposite surfaces of the second gripper (330) and the first gripper (320) are provided with straightening grooves (331). Rotate cylinder (340), which is used to drive the second gripping head (330) to close with the first gripping head (320) under the control of the control module, so as to straighten the needle end (610) of the fisheye needle (600) through the straightening groove (331).

2. The IGBT module pin straightening machine as described in claim 1, characterized in that, The first gripper (320) includes: Two opposing side panels (321) are disposed at the bottom of the mounting plate (310); A lifting head (322) is disposed between the two side plates (321); A lifting cylinder (323) is disposed at the bottom of the mounting plate (310) and is used to drive the lifting head (322) to lift. The opposing surfaces of the lifting head (322) and the second gripping head (330) are rough surfaces; After the needle end (610) of the fisheye needle (600) is straightened by the straightening groove (331), the control module is further configured to control the lifting cylinder (323) to drive the lifting head (322) to lift and lower, so as to polish the burrs and creases on the surface of the needle end (610) of the fisheye needle (600).

3. The IGBT module pin straightening machine as described in claim 2, characterized in that, A trigger sensor (332) is provided on the top of the straightening groove (331); When the control module controls the lifting cylinder (323) to drive the lifting head (322) to lift, the control module is also configured to receive the trigger signal from the trigger sensor (332), and when it receives the trigger signal sent by the trigger sensor (332), control the pin inserter (300) to re-grip the fisheye needle (600).

4. The IGBT module pin straightening machine as described in claim 2, characterized in that, The side wall of the lifting head (322) is provided with a slider (3221). The side plate (321) is provided with a groove (3211) at the corresponding position of the slider (3221); The lifting head (322) is slidably disposed in the slide groove (3211) via the slider (3221).

5. The IGBT module pin straightening machine as described in claim 2, characterized in that, The second gripping head (330) is rotatably disposed between the two side plates (321) via the first rotating shaft (350); Furthermore, the first pivot (350) is located in the lower middle part of the first gripping head (320).

6. The IGBT module pin straightening machine as described in claim 5, characterized in that, The first rotating shaft (350) is located in the lower middle part of the first gripping head (320), that is: The axis center of the first rotating shaft (350) is O; The hinge point between the rotating cylinder (340) and the second gripper (330) is A; The center point of the straightening groove (331) is B; Furthermore, the distance from point O to point A is L1, and the distance from point O to point B is L2; Wherein, L1 > L2, so as to improve the clamping force of the first gripper (320) and the second gripper (330).

7. The IGBT module pin straightening machine as described in claim 2, characterized in that, The bottom of the straightening groove (331) is provided with a notch that communicates with the bottom surface of the second gripper (330); The bottom of the second gripper (330) is provided with an elastic part (360). After the second gripping head (330) and the first gripping head (320) are closed, the elastic part (360) abuts against the locking block (630) of the fisheye needle (600).

8. The IGBT module pin straightening machine as described in claim 1, characterized in that, The drive mechanism (500) includes a first cylinder (510) and a second cylinder (520), and the first cylinder (510) and the second cylinder (520) are mounted on the worktable (100) by corresponding outer frames; The first cylinder (510) and the second cylinder (520) are respectively positioned above the gripping station (220) and the unloading station (210) of the fisheye needle (600), and are used to drive the rotating platform (200) to rotate to the corresponding needle insertion fixture (300) for work under the control of the control module.

9. The IGBT module pin straightening machine as described in claim 8, characterized in that, Electromagnets (530) are provided at the ends of the piston rods of the first cylinder (510) and the second cylinder (520). The pin insertion fixture (300) also includes: A fixed side plate (370) is disposed on the rotating platform (200), and a permanent magnet (371) is disposed on the top surface of the fixed side plate (370). The mounting plate (310) is L-shaped, and the vertical surface of the mounting plate (310) is slidably disposed on the fixed side plate. The top surface of the horizontal surface of the mounting plate (310) is provided with an adsorption surface (311). In the initial state, the top of the vertical surface of the mounting plate (310) is attracted to the permanent magnet (371) of the fixed side plate (370); when the fish-eye needle (600) is gripped or released, the control module controls the electromagnet (530) of the corresponding first cylinder (510) or second cylinder (520) to be energized, and drives the electromagnet (530) to descend, attracting the adsorption surface (311) of the mounting plate (310), and driving the mounting plate (310) to descend, so as to complete the gripping or releasing of the fish-eye needle (600).

10. A method for operating a pin insertion machine for straightening IGBT module pins as described in claim 1, characterized in that, The working method includes: Under the control of the control module, the drive mechanism (500) drives the pin insertion fixture (300) to complete the gripping of the fisheye needle (600), and the straightening groove (331) straightens the needle end (610) of the fisheye needle (600); The rotating platform (200) drives the pin insertion fixture (300) that grabs the fisheye needle (600) to rotate above the IGBT module; The control module controls the drive mechanism (500) to drive the pin insertion fixture (300) to insert the insertion end (620) of the fisheye pin (600) onto the IGBT module, thus completing the pin insertion.

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