Quickly changeable pin needle film

Abstract

This application belongs to the field of power device technology, specifically relating to a quick-change PIN pin mold, comprising: a mold body and multiple positioning sleeves; the mold body has multiple positioning slots arranged sequentially; the multiple positioning sleeves are respectively adapted to the multiple positioning slots, and the positioning sleeves are used to mate with the PIN pins transferred by the pick-and-place unit. The positioning sleeves are available in various models, each adapted to a corresponding specification of PIN pin. This solution provides multiple positioning slots in the mold body, equipped with replaceable positioning sleeves, to achieve precise mating of different PIN pins. During changeover, only the corresponding positioning sleeve is replaced, eliminating the need for overall disassembly and assembly, simplifying operation and reducing costs. The positioning sleeves and slots work together to achieve rapid installation and precise positioning, ensuring repeatability, avoiding pin jamming, missing pins, and pin tip damage, and improving pin feeding stability and soldering quality. It has the advantages of quick changeover, low cost, and strong compatibility, significantly shortening debugging time and suitable for multi-variety production.

Description

Technical Field

[0001] This application belongs to the field of power device technology, specifically relating to a quick-change PIN pin film. Background Technology

[0002] In the packaging process of Insulated Gate Bipolar Transistor (IGBT) power modules, the ultrasonic bonding of the bonding pins is a critical step. This process involves various product types and derivative models within the same type, requiring frequent product changeovers during production. To ensure bonding quality, current processes incorporate a pin visual inspection step into the pin delivery flow, typically using a vision inspection system to perform online inspection of the pins' dimensions, morphology, and surface defects.

[0003] However, the introduction of visual inspection procedures prolongs the overall needle feeding process and significantly increases the structural complexity of the needle feeding mechanism. A typical needle feeding process includes: vibratory feeder → needle receiving mechanism → flipping mechanism → PPU (Pick Place Unit) → needle film → welding head. With the increase in process steps, the precision requirements for the connection between each mechanism increase, especially during product changeovers. Differences in the size, shape, or pitch of different PINs necessitate adjustments to the needle feeding path. In actual production, frequent changeovers bring numerous technical problems: First, the connection positions between the various needle feeding mechanisms are difficult to match precisely after a changeover, easily leading to missed needles and needle jamming; second, each mechanism needs to be re-adjusted and repositioned, resulting in long changeover debugging times and increased production preparation cycles; more seriously, improper mechanism coordination may cause mechanical damage to the PIN tip during transmission, affecting subsequent welding quality and product reliability.

[0004] In existing technologies, to address the aforementioned problems, a common approach is to replace the entire needle feeding module (such as a vibratory feeder and its associated transmission mechanism) to achieve rapid changeover. While this solution can shorten changeover time to some extent, it has significant drawbacks: Firstly, the cost of reconfiguring the entire mechanism is high, especially for multi-variety, small-batch production models, leading to a substantial increase in equipment investment. Secondly, the existing needle feeding process is relatively long, involving the collaborative work of multiple functional units. Replacing the entire module is not only complex but also makes it difficult to guarantee the alignment accuracy of each interface after replacement, potentially introducing new alignment errors and malfunction risks. Utility Model Content

[0005] The technical problem to be solved by this application is to provide a PIN needle film that can be quickly changed, with low cost, convenient changeover, high positioning accuracy and strong compatibility.

[0006] This application provides a quick-change PIN needle film, comprising: The needle membrane body has multiple positioning slots arranged sequentially; Multiple positioning sleeves are adapted to multiple positioning slots. The positioning sleeves are used to mate with the PIN pins transferred by the pick-and-place unit. The positioning sleeves are available in various models and are adapted to PIN pins of corresponding specifications.

[0007] Optionally, the side wall of the needle membrane body has a groove communicating with the corresponding positioning slot, and the positioning sleeve has an opening that mates with the groove, and a pin is inserted into the opening to fix the positioning sleeve.

[0008] Optionally, the pin includes a positioning block that engages with the slot and a pin that engages with the opening.

[0009] Optionally, the slot is rectangular in shape, and the corresponding positioning block is cuboid in shape.

[0010] Optionally, the opening is a round hole or a square hole, and the corresponding pin is a cylinder or a square column.

[0011] Optionally, the size of the positioning slot is 0.5mm-3mm.

[0012] Optionally, the distance between two adjacent positioning slots is 0.3mm-2mm.

[0013] Optionally, the cross-sectional shape of the positioning slot is circular, rectangular, or semi-circular, and the outer contour shape of the positioning sleeve is the same as the shape of the positioning slot.

[0014] Optionally, the length of the positioning sleeve is not greater than the depth of the positioning slot.

[0015] Optionally, the needle membrane body has 4-12 positioning slots arranged in a straight line.

[0016] The beneficial effects of this application are that it eliminates the need for complete disassembly during needle replacement, replacing it with a positioning sleeve. Multiple positioning slots are set on the needle membrane body, and various replaceable positioning sleeves of different models are configured to achieve precise docking of PIN needles of different specifications. During operation, the pick-and-place unit transfers the PIN needle to the corresponding positioning sleeve, which achieves quick installation and precise positioning through its adaptation with the slot. When changing product types, only the matching positioning sleeve needs to be replaced; there is no need to replace the entire needle feeding mechanism or adjust the various transmission units. This solution significantly reduces the cost of repeated equipment investment, simplifies the changeover process, and shortens the debugging time. Simultaneously, the cooperation between the positioning slot and the positioning sleeve ensures high repeatability of positioning after each replacement, effectively avoiding needle jamming, needle leakage, and needle tip damage, improving needle feeding stability and welding quality. It has the advantages of quick changeover, low cost, and strong compatibility. Attached Figure Description

[0017] Figure 1This is a schematic diagram illustrating the connection between a PIN needle and a needle film in existing technology. Figure 2 This is a schematic diagram showing the relative offset between the PIN needle and the needle film after the existing technology has been modified. Figure 3 This is a schematic diagram of the structure of the quick-change PIN needle film provided in the embodiments of this application; Figure 4 This is a schematic diagram of the structure of multiple positioning sleeves provided in the embodiments of this application.

[0018] In the diagram: 10, needle membrane body; 11, positioning slot; 12, groove; 20, positioning sleeve; 21, opening; 30, pick-and-place unit. Detailed Implementation

[0019] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0020] like Figure 1 As shown, in the prior art, the PIN pins and needle film of a certain type of PPU transfer can be correctly aligned, such as... Figure 2 As shown, after the change, the PIN needle and the needle membrane are relatively misaligned, which makes it impossible to insert the needle into the acupoint of the needle membrane, requiring a lot of time to adjust the position.

[0021] To solve the above technical problems, such as Figure 3 and Figure 4 As shown, the present application provides a quick-change PIN needle film, including: a needle film body 10 and a plurality of positioning sleeves 20; the needle film body 10 has a plurality of positioning slots 11 arranged in sequence; the plurality of positioning sleeves 20 are respectively adapted to the plurality of positioning slots 11, the positioning sleeves 20 are used to mate with the PIN needles transferred by the pick-and-place unit 30, and the positioning sleeves 20 have a variety of models, each adapted to a PIN needle of a corresponding specification.

[0022] Compared with existing technologies, the quick-change PIN needle film provided in this application eliminates the overall removal process during needle film replacement, instead using a replacement positioning sleeve 20. Multiple positioning slots 11 are set on the needle film body 10, and various replaceable positioning sleeves 20 of different models are configured to achieve precise docking of PIN needles of different specifications. During operation, the pick-and-place unit 30 transfers the PIN needle to the corresponding positioning sleeve 20, and the positioning sleeve 20 achieves quick installation and precise positioning through its adaptation with the slot. When changing product types, only the matching positioning sleeve 20 needs to be replaced; there is no need to replace the entire needle feeding mechanism or adjust each transmission unit. This solution significantly reduces the cost of repeated equipment investment, simplifies the changeover process, and shortens the debugging time. Simultaneously, the cooperation between the positioning slot 11 and the positioning sleeve 20 ensures high repeatability of positioning after each replacement, effectively avoiding needle jamming, needle leakage, and needle tip damage, improving needle feeding stability and welding quality. It has the advantages of quick changeover, low cost, and strong compatibility.

[0023] In one possible implementation, the side wall of the needle membrane body 10 has a slot 12 that communicates with the corresponding positioning slot 11, and the positioning sleeve 20 has an opening 21 that mates with the slot 12. A pin is inserted into the opening 21 to fix the positioning sleeve 20.

[0024] Specifically, after the positioning sleeve 20 is inserted into the positioning slot 11 and adjusted into place, the pin passes laterally through the groove 12 of the needle film body 10 and the opening 21 of the positioning sleeve 20 to form a mechanical limit, preventing the positioning sleeve 20 from loosening or shifting due to force during needle feeding. This structure enables quick installation and reliable locking of the positioning sleeve 20, ensuring both ease of operation during replacement and stable connection and repeatability between the positioning sleeve 20 and the needle film body 10, effectively improving changeover efficiency and production stability.

[0025] In one possible implementation, the pin includes a positioning block that engages with the slot 12 and a pin that engages with the opening 21.

[0026] Specifically, the positioning block and the slot 12 provide lateral positioning, ensuring the accurate installation position of the pin on the needle film body 10; the pin is inserted into the opening 21 of the positioning sleeve 20, forming a radial constraint on the positioning sleeve 20. The two work together to firmly lock the positioning sleeve 20 after it is inserted into the positioning slot 11, preventing it from loosening or shifting during use. When the positioning sleeve 20 needs to be removed, part of the pin is pulled out, causing the positioning block to disengage from the slot 12. Then, the positioning sleeve 20 can be pushed out by the pin. This structure not only improves the reliability and repeatability of the positioning sleeve 20 installation but also facilitates quick assembly and disassembly using manual or automated tools, further enhancing changeover efficiency and connection stability.

[0027] In one possible implementation, the slot 12 is rectangular in shape, and the corresponding positioning block is cuboid in shape.

[0028] Specifically, the rectangular slot 12 cooperates with the cuboid positioning block to restrict the circumferential rotation of the pin, ensuring that the pin is installed in a unique direction and in an accurate position, thereby improving positioning reliability and assembly efficiency.

[0029] In one possible implementation, the opening 21 is a round hole or a square hole, and the corresponding pin is a cylinder or a square cylinder.

[0030] Specifically, the engagement of a round hole with a cylindrical pin or a square hole with a square pin enables circumferential positioning and a secure connection of the positioning sleeve 20. The cylindrical shape is suitable for quick alignment and installation with a large assembly tolerance; the square pin with a square hole prevents pin rotation and enhances shear resistance. Both structures reliably secure the positioning sleeve 20, adapting to different working conditions and balancing ease of assembly with connection stability.

[0031] In one possible implementation, the size of the positioning slot 11 is 0.5mm-3mm. For example, if the positioning slot 11 is a circular slot, its diameter can be any typical but non-limiting value, such as 0.5mm, 1.0mm, 1.5mm, 2.0mm, or 3mm, or a range between any two such values. If the positioning slot 11 is a square slot, its side length can be any typical but non-limiting value, such as 0.5mm, 1.0mm, 1.5mm, 2.0mm, or 3mm, or a range between any two such values.

[0032] In one possible implementation, the spacing between two adjacent positioning slots 11 is 0.3mm-2mm. For example, the spacing between two adjacent positioning slots 11 can be any typical but non-limiting point value or a range between any two points, such as 0.3mm, 0.5mm, 1.0mm, 1.5mm, or 2mm. In this case, this spacing design adapts to different pin pitch specifications, meets the needs of multiple product model replacements, and allows for the arrangement of multiple positioning slots 11 within a limited space, improving the versatility of the pin membrane. Simultaneously, a reasonable spacing avoids mutual interference during the installation of the positioning sleeves 20, ensuring structural strength and positioning accuracy, facilitating precise matching of different pin layouts, and enabling rapid replacement and stable transmission.

[0033] In one possible implementation, the cross-sectional shape of the positioning slot 11 is circular, rectangular, or semi-circular, and the outer contour shape of the positioning sleeve 20 is the same as that of the positioning slot 11.

[0034] In one possible implementation, the length of the positioning sleeve 20 is no greater than the depth of the positioning slot 11.

[0035] Specifically, the length of the positioning sleeve 20 is no greater than the depth of the positioning slot 11, ensuring that the positioning sleeve 20 is fully embedded in the positioning slot 11 and avoiding protrusion that could cause interference with other components or uneven force distribution. This design ensures a smooth needle film surface, improves structural stability and assembly reliability, and prevents the positioning sleeve 20 from becoming loose or shifting, thus affecting the pin contact accuracy and ensuring smooth needle feeding and accurate positioning.

[0036] In one possible implementation, the needle membrane body 10 has 4-12 positioning slots 11 arranged in a straight line. For example, the needle membrane body 10 has 4, 5, 6, 8, 10, or 12 positioning slots 11 arranged in a straight line.

[0037] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0038] One or more embodiments in this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this application should be included within the protection scope of this application.

Claims

1. A quick-change PIN needle film, characterized in that, include: The needle membrane body (10) has a plurality of positioning slots (11) arranged in sequence. Multiple positioning sleeves (20) are adapted to multiple positioning slots (11). The positioning sleeves (20) are used to connect with the PIN pins transferred by the pick-and-place unit (30). The positioning sleeves (20) have multiple models and are adapted to PIN pins of corresponding specifications. The side wall of the needle membrane body (10) has a groove (12) that communicates with the positioning slot (11), and the positioning sleeve (20) has an opening (21) that mates with the groove (12). A pin is inserted into the opening (21) to fix the positioning sleeve (20).

2. The quick-change PIN needle film according to claim 1, characterized in that, The pin includes a positioning block that engages with the slot (12) and a pin that engages with the opening (21).

3. The quick-change PIN needle film according to claim 2, characterized in that, The slot (12) is rectangular in shape, and the corresponding positioning block is cuboid in shape.

4. The quick-change PIN needle film according to claim 3, characterized in that, The opening (21) is a round hole or a square hole, and the corresponding pin is a cylinder or a square column.

5. The quick-change PIN needle film according to any one of claims 1-4, characterized in that, The positioning slot (11) is a round hole with a diameter of 0.5mm-3mm; or the positioning slot (11) is a square hole with a side length of 0.5mm-3mm.

6. The quick-change PIN needle film according to claim 5, characterized in that, The distance between two adjacent positioning slots (11) is 0.3mm-2mm.

7. The quick-change PIN needle film according to any one of claims 1-4, characterized in that, The cross-sectional shape of the positioning slot (11) is circular, rectangular or semi-circular, and the outer contour shape of the positioning sleeve (20) is the same as that of the positioning slot (11).

8. The quick-change PIN needle film according to any one of claims 1-4, characterized in that, The length of the positioning sleeve (20) is not greater than the depth of the positioning slot (11).

9. The quick-change PIN needle film according to any one of claims 1-4, characterized in that, The needle membrane body (10) has 4-12 positioning slots (11) arranged in a straight line.

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