Optocoupling wire frame positioning device of optocoupling die bonder

Abstract

The utility model relates to a die bonder technical field especially relates to a photoelectric coupling lead frame positioning device of photoelectric coupling die bonder, through the forced stop function is removed from traditional response baffle to adjustable block, makes the block accurate resistance lead frame most solid side rail end portion, not fragile pin and connecting rib, will impact force disperses to whole frame rigid structure, through the test, side rail can bear more than 50 newton's impact force, the deformation rate is from 5% to reduce below 0.3%, thereby avoid the metal debris residue of cutting rib process, based on the block adjustable structure cooperation scale position in strip hole, operating personnel can accurately adjust the block position according to different specifications lead frame, the synchronous setting adjustment arm linkage double block, ensure that both sides block synchronous movement, eliminate the frame distortion risk caused by one side stress, solve the technical problem that the lead frame is easy to deform in the impact process when the existing response baffle forces stop the high -speed movement of lead frame.

Description

Technical Field

[0001] This utility model relates to the field of die bonder technology, and in particular to a positioning device for the optical coupler lead frame of an optical coupler die bonder. Background Technology

[0002] During the optocoupler die bonding process, the lead frame slides into the die bonding area at high speed via an electrode-driven pulley, typically exceeding 0.5 meters per second. The lead frame is then forcibly stopped by an induction baffle for precise positioning and subsequent die bonding. However, this process introduces a series of problems: the lead frame pins and connecting ribs experience tremendous impact forces upon impact with the induction baffle, typically exceeding 20 Newtons. Since the pins are only 0.25 millimeters thick and the connecting ribs are relatively fragile, the lead frame is prone to deformation during impact, with a deformation rate as high as 5%. This deformation leads to metal debris residue during subsequent lead trimming, potentially causing short circuits between the product pins. Statistics show that this results in a defect rate between 3% and 5%. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a positioning device for the optical coupler lead frame of an optical coupler die bonder, which solves the technical problem that the lead frame is prone to deformation during impact when the existing induction baffle forces a stop on the high-speed moving lead frame.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a positioning device for the optical coupler lead frame of an optical coupler bonding machine, including a conveying device for conveying the optical coupler lead frame, an induction baffle for detecting and positioning the optical coupler lead frame on the conveying device, the conveying device including two parallel pillars as mounting carriers, a slide rail for conveying the optical coupler bracket between the two pillars, a horizontally opened strip hole on the pillar in the same direction as the extension of the pillar, and an adjustable stop block fixed in the strip hole, which positions the optical coupler lead frame by abutting against the end of the side rail.

[0005] Preferably, the end of the support column with the sensing baffle is fixed with a scale for assisting in the positioning of the stop block.

[0006] Preferably, an adjusting arm is slidably disposed between the two pillars to drive the two stops to move simultaneously along the strip hole.

[0007] Preferably, the two ends of the adjusting arm are slidably disposed in two strip holes.

[0008] Preferably, the adjusting arm is detachably mounted inside the slot.

[0009] Preferably, the stop includes a fixing part fixed in the strip hole, and a limiting part for abutting against the side rail of the optocoupler lead frame is fixed on the fixing part, and the side of the limiting part is slidably disposed with the side wall of the support column.

[0010] By employing the above technical solution, this utility model provides an optical coupler lead frame positioning device for an optical coupler die bonder, which has at least the following beneficial effects:

[0011] 1. This utility model transfers the forced stop function from the traditional induction baffle to an adjustable stop block, so that the stop block accurately abuts against the most robust side rail end of the lead frame, rather than the fragile pins and connecting ribs, dispersing the impact force to the rigid structure of the overall frame. Tests have shown that the side rail can withstand an impact force of more than 50 Newtons, and the deformation rate has been reduced from 5% to less than 0.3%. This avoids metal debris residue from the lead cutting process, and the pin short circuit failure rate has been reduced from 3% to 5% to less than 0.5%, significantly reducing rework costs and improving the reliability of the die bonded product.

[0012] 2. This utility model is based on the adjustable stop block structure in the strip hole and the positioning of the scale. The operator can accurately adjust the position of the stop block according to different specifications of the lead frame, with an adjustment accuracy of ±0.1 mm. The synchronously set adjustment arm links the double stop blocks to ensure that the stop blocks on both sides move synchronously, eliminating the risk of frame twisting caused by unilateral force.

[0013] 3. In this utility model, the limiting part of the stop block slides with the side wall of the support column to form a double guiding support, which effectively resists the torsional torque under high-speed impact and prevents the stop block from loosening or sinking. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0015] Figure 1 This is a schematic diagram of the optical coupler lead frame positioning device of the optical coupler die bonder of this utility model.

[0016] In the diagram: 1. Conveying device; 11. Support column; 12. Slide rail; 2. Induction baffle; 3. Strip hole; 4. Stop block; 41. Fixing part; 42. Limiting part; 5. Scale; 6. Adjusting arm. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] To address the technical problem of existing induction baffles causing deformation of the lead frame during impact when forcibly stopping a high-speed moving lead frame, this invention provides an optical coupler lead frame positioning device for an optical coupler bonding machine. This device changes the structure and force application position for forcibly stopping the high-speed moving optical coupler lead frame, thereby significantly reducing the probability of impact deformation. A conveying device 1 transports the optical coupler lead frame to the bonding position of the bonding machine. The conveying device 1 is equipped with an induction baffle 2 for detecting and positioning the optical coupler lead frame. The baffle detects the arrival of the lead frame and triggers a positioning signal, thereby issuing a command to the bonding machine to begin the bonding process. The conveying device 1 includes two parallel support pillars 11 serving as mounting carriers, forming the core of the conveying device 1. The carrier provides rigidity and support. A slide rail 12 for transporting the optocoupler bracket is set between the two pillars 11. The guide wire frame is smoothly transported to the die bonding position of the die bonder along a specific path between the two pillars 11. A strip hole 3 with the same extension direction as the pillar 11 is opened horizontally on the pillar 11. A stop 4 is fixedly and adjustable in the strip hole 3, which is positioned by abutting against the end of the side rail of the optocoupler lead frame. The strip hole 3 serves as an adjustment channel and is the key structure to realize the adjustable position of the stop 4. The forced stop and precise positioning of the lead frame is achieved by the adjustable stop 4 abutting against the end of the side rail of the optocoupler lead frame. The side rail is the strongest part of the lead frame, which disperses the impact force to the entire side rail structure, effectively preventing the fragile pins and connecting ribs of the lead frame from being directly subjected to the impact force and deformed.

[0019] To further improve the positioning accuracy and ease of operation of the optocoupler lead frame, the support column 11 is equipped with a scale 5 fixed at one end of the sensing baffle 2 to assist in the positioning of the stop block 4, providing an intuitive and quantitative position reference. Operators can precisely adjust the position of the stop block 4 in the strip hole 3 according to the specifications of the lead frame, ensuring the consistency of each positioning and improving production efficiency and yield.

[0020] To further improve the adjustment efficiency and ensure synchronization of this device, an adjustment arm 6 is slidably installed between the two support pillars 11 to drive the two stops 4 to move simultaneously along the strip hole 3. The operator only needs to move the adjustment arm 6, for example, to make the adjustment arm 6 U-shaped, with its two ends respectively set on the two stops 4, so that the stops 4 on the two support pillars can move simultaneously and synchronously along their respective strip holes 3. This ensures that the two stops 4 are always in the correct relative position, so that the two stops 4 can contact the edge rail of the lead frame at a higher probability. This avoids the lead frame being subjected to torsional force and deformed by the compression of the side of the support pillar 11 after only one edge rail contacts the stop 4 first. It also avoids the asynchronous and asymmetrical problems that may occur when manually adjusting the two stops separately. For different optocoupler lead frames, the position of the stops 4 may be different. Therefore, when changing the position of the stops 4, the adjustment efficiency and positioning accuracy are greatly improved.

[0021] To further ensure the accuracy of the movement of the adjusting arm 6, both ends of the adjusting arm 6 are slidably set in the two strip holes 3 respectively, eliminating the need for additional guide rails for the sliding of the adjusting arm. This ensures the linearity and stability of the movement of the adjusting arm 6, thereby ensuring the synchronicity and accuracy of the movement of the two stops 4 driven by it. At the same time, to facilitate the disassembly of the adjusting arm 6 after the position of the stops 4 is adjusted, and to save space, the adjusting arm 6 is detachably installed in the strip holes 3.

[0022] To further improve the fixing, limiting function and movement stability of the stop block 4, the stop block 4 includes a fixing part 41 fixed in the slot 3, which is responsible for firmly locking the stop block 4 in the desired position in the slot 3. For example, the fixing part 41 is locked in the slot 3 by screws, clamps, etc. The fixing part 41 is fixed with a limiting part 42 for abutting against the side rail of the optocoupler lead frame. This part is the part that actually contacts the end of the side rail of the lead frame and performs the forced stop function. The side of the limiting part 42 is slidably disposed against the side wall of the support column 11. When adjusting the position of the stop block 4, the side of the limiting part 42 slides against the side wall of the support column 11, thereby providing additional guidance and support, effectively preventing the stop block 4 from shaking, twisting or sinking when subjected to the impact force of the side rail of the lead frame, ensuring the accuracy and rigidity of the lead frame positioning, and especially ensuring that the stop block 4 remains stable when subjected to impact.

[0023] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A positioning device for the optical coupler lead frame of an optical coupler bonding machine, comprising a conveying device (1) for conveying the optical coupler lead frame, wherein the conveying device (1) is provided with a sensing baffle (2) for detecting and positioning the optical coupler lead frame, characterized in that, The conveying device (1) includes two parallel pillars (11) as the mounting carrier. A slide rail (12) for conveying the optocoupler bracket is provided between the two pillars (11). A strip hole (3) with the same extension direction as the pillar (11) is opened horizontally on the pillar (11). A stop block (4) is fixed in the strip hole (3) in an adjustable manner and is positioned by abutting against the end of the side rail of the optocoupler lead frame.

2. The optocoupler lead frame positioning device according to claim 1, characterized in that, The support column (11) is provided with a sensor baffle (2) and a scale (5) for positioning the auxiliary stop (4) is fixed at one end.

3. The optocoupler lead frame positioning device according to claim 1, characterized in that, An adjusting arm (6) is slidably provided between the two pillars (11) for driving the two stops (4) to move simultaneously along the strip hole (3).

4. The optocoupler lead frame positioning device according to claim 3, characterized in that, The two ends of the adjusting arm (6) are respectively slidably disposed in the two strip holes (3).

5. The optocoupler lead frame positioning device according to claim 3, characterized in that, The adjusting arm (6) is detachably installed in the slot (3).

6. The optocoupler lead frame positioning device according to claim 1, characterized in that, The stop block (4) includes a fixing part (41) fixed in the strip hole (3), and a limiting part (42) for abutting against the side rail of the optocoupler lead frame is fixed on the fixing part (41). The side of the limiting part (42) is slidably disposed with the side wall of the support column (11).

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