An angle bending fixture for IGBT production

Abstract

This utility model relates to the field of tooling technology, and in particular to a bending tooling for IGBT production. It includes a machine base with a turntable rotatably connected to its upper end. The turntable is driven by a motor, and several I-shaped slots are formed on the turntable. A mold for placing IGBTs is installed on each I-shaped slot, and the mold is fixedly connected to the turntable via a snap-fit ​​mechanism. The upper surface of the mold is flush with the upper surface of the turntable. In this utility model, a feeding mechanism precisely pushes the IGBT chip to be bent into the mold on the turntable. The motor drives the turntable to rotate intermittently, transferring the mold containing the IGBTs to the lower end of a bending assembly. The bending assembly then bends the IGBT pins. After bending, the turntable continues to rotate, conveying the finished IGBT to the unloading mechanism, which collects the finished product.

Description

Technical Field

[0001] This utility model relates to the field of tooling technology, and in particular to a bending tooling for IGBT production. Background Technology

[0002] IGBT (Insulated Gate Bipolar Transistor) is a composite fully controllable power semiconductor device that combines the high input impedance of MOSFET and the low on-state voltage drop of BJT. It is widely used in high-voltage, high-current power electronics.

[0003] Before IGBTs can be used, their pins need to be bent. For example, Chinese Patent Announcement No. "CN219286861 U" discloses an IGBT chip terminal bending device, which includes a base, a processing box, a first hydraulic rod, a first pressure plate, and a tilt sensor. The processing box is fixedly installed on the top of the base. The first hydraulic rod and the second hydraulic rod are respectively provided on both sides of the inner wall of the processing box. The first pressure plate and the second pressure plate are respectively fixedly installed on the telescopic ends of the first hydraulic rod and the second hydraulic rod.

[0004] Most existing bending devices cannot achieve continuous and automated bending of IGBT pins, which leads to production interruptions, affects efficiency, and increases labor and time costs. Utility Model Content

[0005] The purpose of this invention is to solve the problem of continuous bending in the existing technology, and to propose a bending tool for IGBT production.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Design a bending fixture for IGBT production, including a machine base, a turntable rotatably connected to the upper end of the machine base, the turntable being driven by a motor, a plurality of I-shaped slots being opened on the turntable, a mold for placing IGBTs being installed on the I-shaped slots, the mold being fixedly connected to the turntable by a fastener, and the upper end face of the mold being flush with the upper end face of the turntable.

[0008] The machine is equipped with a bending assembly for bending IGBT pins, and the upper end of the machine is equipped with a feeding mechanism and a unloading mechanism.

[0009] Furthermore, the fastener includes an L-shaped mounting groove formed in the turntable, one end of the L-shaped mounting groove is connected to an I-shaped groove, an L-shaped insert rod is slidably connected in the L-shaped mounting groove, a fixing hole is provided at one end of the mold, one end of the L-shaped insert rod is inserted into the fixing hole, a spring is fixedly connected to one side of the L-shaped insert rod, and one end of the spring is fixedly connected to the inner wall of the L-shaped mounting groove.

[0010] Furthermore, the bending assembly includes a fixed bracket mounted on a machine base, a cylinder A fixedly connected to the fixed bracket, a connecting plate fixedly connected to the telescopic end of the cylinder A, a pressure block for bending the IGBT fixedly connected to the lower end of the connecting plate, and a stabilizing component for pressing the IGBT mounted on the connecting plate.

[0011] Furthermore, the stabilizing component includes a pressure rod that is movably inserted into the connecting plate. A rubber block is fixedly installed at one end of the pressure rod, and a compression spring is provided on the surface of the pressure rod, with the compression spring located between the connecting plate and the rubber block.

[0012] Furthermore, the feeding mechanism includes a mounting frame installed on the upper part of the machine platform. A fixing block with an internal convex structure is fixedly connected to the upper end of the mounting frame. A guide groove is inserted through the fixing block. The guide groove is fixedly connected to the fixing block by bolts. The lower end of the guide groove abuts against the upper surface of the mold.

[0013] Furthermore, the feeding mechanism includes a cylinder B mounted on the machine base. The telescopic end of the cylinder B is fixedly connected to a wedge-shaped block. Through slots are provided on the I-beam groove and the mold. A receiving box is also provided on the machine base.

[0014] The present invention provides a bending fixture for IGBT production, which has the following advantages: In this invention, the IGBT chip to be bent is accurately pushed into the mold of the turntable by the feeding mechanism. The motor drives the turntable to rotate intermittently, transferring the mold containing the IGBT to the lower end of the bending assembly. The bending assembly then bends the IGBT pins. After bending, the turntable continues to rotate, conveying the finished IGBT to the unloading mechanism, which collects the finished product. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This utility model Figure 1 Enlarged schematic diagram of area A structure;

[0017] Figure 3 This is a cross-sectional structural diagram of the buckle component of this utility model;

[0018] Figure 4 This utility model Figure 3 A magnified schematic diagram of the structure of area B.

[0019] In the diagram: 1. Machine base; 11. Turntable; 12. I-beam groove; 13. Mold; 2. Fastener; 21. L-shaped mounting groove; 22. L-shaped insert; 23. Fixing hole; 24. Spring; 3. Bending assembly; 31. Fixed bracket; 32. Cylinder A; 33. Connecting plate; 34. Pressure block; 35. Stabilizer; 351. Pressure rod; 352. Rubber block; 353. Compression spring; 4. Feeding mechanism; 41. Mounting frame; 42. Fixing block; 43. Guide chute; 5. Unloading mechanism; 51. Cylinder B; 52. Wedge block; 53. Through groove; 54. Receiving box. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Reference Figure 1-4 A bending fixture for IGBT production includes a machine base 1. A turntable 11 is rotatably connected to the upper end of the machine base 1. The turntable 11 is driven by a motor. Several I-shaped slots 12 are formed on the turntable 11. A mold 13 for placing IGBTs is installed on the I-shaped slots 12. In this embodiment, when the IGBT is placed in the mold 13, its upper end face is flush with the upper end face of the mold 13. The mold 13 is fixedly connected to the turntable 11 by a fastener 2. The upper end face of the mold 13 is flush with the upper end face of the turntable 11. In this utility model, since the mold 13 is fixed by the fastener 2, when it is necessary to bend IGBTs of different specifications, the locking of the mold 13 can be released by the fastener 2, and different molds can be replaced.

[0022] A bending assembly 3 for bending IGBT pins is provided on the machine base 1. A feeding mechanism 4 and a unloading mechanism 5 are provided at the upper end of the machine base 1. In this utility model, the IGBT chip to be bent is accurately pushed into the mold 13 of the turntable 11 by the feeding mechanism 4. The motor drives the turntable 11 to rotate intermittently, and the mold 13 containing the IGBT is transferred to the lower end of the bending assembly 3. The bending assembly 3 bends the IGBT pins. After bending is completed, the turntable 11 continues to rotate, and the finished IGBT is transported to the station of the unloading mechanism 5. The unloading mechanism 5 completes the collection of finished products.

[0023] Furthermore, the fastener 2 includes an L-shaped mounting groove 21 formed in the turntable 11. One end of the L-shaped mounting groove 21 is connected to the I-shaped groove 12. An L-shaped insert rod 22 is slidably connected in the L-shaped mounting groove 21. A fixing hole 23 is provided at one end of the mold 13. One end of the L-shaped insert rod 22 is inserted into the fixing hole 23. A spring 24 is fixedly connected to one side of the L-shaped insert rod 22. One end of the spring 24 is fixedly connected to the inner wall of the L-shaped mounting groove 21. In this utility model, the spring force of the spring 24 pushes the L-shaped insert rod 22 to move, so that it engages with the fixing hole 23, thereby fixing the mold 13. When it is necessary to change to a different mold 13, the L-shaped insert rod 22 is pushed to release it from the fixing hole 23, so that the mold 13 can be taken out and replaced with a mold 13 of other specifications.

[0024] Furthermore, the bending assembly 3 includes a fixed bracket 31 mounted on the machine base 1. A cylinder A32 is fixedly connected to the fixed bracket 31. A connecting plate 33 is fixedly connected to the telescopic end of the cylinder A32. A pressure block 34 for bending the IGBT is fixedly connected to the lower end of the connecting plate 33. A stabilizing component 35 for pressing the IGBT is installed on the connecting plate 33. In this invention, when the IGBT rotates to the lower end of the bending assembly 3 via the turntable 11, the pressure block 34 is driven to move by the cylinder A32 to bend the pins of the IGBT. At the same time, the stabilizing component 35 presses the IGBT body to prevent chip displacement during the bending process and ensure the pin bending accuracy.

[0025] The stabilizing component 35 includes a pressure rod 351 that is movably inserted into the connecting plate 33. A rubber block 352 is fixedly installed at one end of the pressure rod 351. In this embodiment, when the pressure block 34 and the rubber block 352 move downward, the rubber block 352 will press the IGBT body first. A compression spring 353 is provided on the surface of the pressure rod 351. The compression spring 353 is located between the connecting plate 33 and the rubber block 352. In this utility model, when the cylinder A32 drives the pressure block 34 and the stabilizing component 35 to move downward as a whole, the rubber block 352 will contact and press the IGBT chip body before the pressure block 34. At this time, the compression spring 353 located between the connecting plate 33 and the rubber block 352 is compressed, generating continuous pressure, so that the IGBT chip can be stably fixed, preventing displacement due to force, thereby ensuring the accuracy of pin bending.

[0026] In addition, the feeding mechanism 4 includes a mounting frame 41 installed on the upper end of the machine base 1. The upper end of the mounting frame 41 is fixedly connected to a fixing block 42 with an internal convex structure. A guide groove 43 is inserted through the fixing block 42. The guide groove 43 is fixedly connected to the fixing block 42 by bolts. The lower end of the guide groove 43 abuts against the upper end face of the mold 13. In this utility model, the IGBT is placed in the guide groove 43 and falls into the mold 13 by gravity. Since the guide groove 43 is fixedly connected to the fixing block 42 by bolts, when it is necessary to replace the IGBT with a guide groove 43 of the same specification as the IGBT, it can be replaced.

[0027] Furthermore, the unloading mechanism 5 includes a cylinder B51 mounted on the machine base 1. The telescopic end of the cylinder B51 is fixedly connected to a wedge block 52. Through slots 53 are provided on both the I-beam groove 12 and the mold 13. A receiving box 54 is also provided on the machine base 1. In this utility model, when the cylinder B51 is started, it pushes the wedge block 52 to move upward. The inclined surface of the wedge block 52 passes through the through slot 53, lifting the processed IGBT placed on the mold 13, causing it to detach from the mold. The lifted IGBT falls into the receiving box 54 provided on the machine base 1 under the action of gravity, thereby completing the entire unloading process.

[0028] Working method: During operation, the IGBT is placed in the guide groove 43 and falls into the mold 13 by gravity. The motor drives the turntable 11 to rotate intermittently, transferring the mold 13 containing the IGBT to the lower end of the bending assembly 3. The cylinder A32 drives the pressure block 34 and the stabilizing component 35 to move downward as a whole. The rubber block 352 will contact and press the IGBT chip body before the pressure block 34. At this time, the compression spring 353 located between the connecting plate 33 and the rubber block 352 is compressed, generating continuous pressure, so that the IGBT chip can be stably fixed and prevented from displacement due to force, thereby ensuring the accuracy of pin bending. After bending is completed, the turntable 11 continues to rotate, and the cylinder B51 pushes the wedge block 52 to move upward. The inclined surface of the wedge block 52 will pass through the through groove 53, lifting the processed IGBT placed on the mold 13, so that it is removed from the mold. The lifted IGBT falls into the receiving box 54 set on the machine 1 under the action of gravity, thus completing the entire unloading process.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A corner bending tool for IGBT production, comprising a machine table (1), characterized in that: The upper end of the machine base (1) is rotatably connected to a turntable (11). The turntable (11) is driven by a motor. Several I-shaped slots (12) are opened on the turntable (11). A mold (13) for placing IGBTs is installed on the I-shaped slots (12). The mold (13) is fixedly connected to the turntable (11) by a fastener (2). The upper end face of the mold (13) is flush with the upper end face of the turntable (11). A bending assembly (3) for bending IGBT pins is provided on the machine base (1), and a feeding mechanism (4) and a unloading mechanism (5) are provided at the upper end of the machine base (1).

2. The corner bending tool for IGBT production according to claim 1, characterized in that: The fastener (2) includes an L-shaped mounting groove (21) opened in the turntable (11), one end of the L-shaped mounting groove (21) is connected to the I-shaped groove (12), an L-shaped insert (22) is slidably connected in the L-shaped mounting groove (21), a fixing hole (23) is provided at one end of the mold (13), one end of the L-shaped insert (22) is inserted into the fixing hole (23), a spring (24) is fixedly connected to one side of the L-shaped insert (22), and one end of the spring (24) is fixedly connected to the inner wall of the L-shaped mounting groove (21).

3. The corner bending tool for IGBT production according to claim 1, characterized in that: The bending assembly (3) includes a fixed bracket (31) mounted on the machine base (1), a cylinder A (32) is fixedly connected to the fixed bracket (31), a connecting plate (33) is fixedly connected to the telescopic end of the cylinder A (32), a pressure block (34) for IGBT bending is fixedly connected to the lower end of the connecting plate (33), and a stabilizing component (35) for pressing the IGBT is installed on the connecting plate (33).

4. The corner bending tool for IGBT production according to claim 3, characterized in that: The stabilizer (35) includes a pressure rod (351) that is movably inserted into the connecting plate (33). A rubber block (352) is fixedly installed at one end of the pressure rod (351). A compression spring (353) is provided on the surface of the pressure rod (351). The compression spring (353) is located between the connecting plate (33) and the rubber block (352).

5. The corner bending tool for IGBT production according to claim 1, characterized in that: The feeding mechanism (4) includes a mounting frame (41) installed on the upper end of the machine base (1). The upper end of the mounting frame (41) is fixedly connected to a fixing block (42) with an internal convex structure. A guide groove (43) is inserted through the fixing block (42). The guide groove (43) is fixedly connected to the fixing block (42) by bolts. The lower end of the guide groove (43) abuts against the upper surface of the mold (13).

6. The corner bending tool for IGBT production according to claim 1, characterized in that: The feeding mechanism (5) includes a cylinder B (51) installed on the machine base (1). The telescopic end of the cylinder B (51) is fixedly connected to a wedge block (52). Through slots (53) are provided on the I-beam groove (12) and the mold (13). A receiving box (54) is also provided on the machine base (1).

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