A chip lead forming apparatus

Abstract

This invention discloses a chip lead-cutting and forming apparatus, including a conveying mechanism and a lead-cutting mechanism. The conveying mechanism is used to transport materials intermittently, with each movement distance matching the size of the material. The lead-cutting mechanism is located above the conveying mechanism and includes a power component and a lead-cutting cutter. The power component drives and connects to the lead-cutting cutter. The lead-cutting cutter includes an opening and a slitting section, with the opening fixedly disposed on the side of the slitting section. The shape formed by the slitting section matches the shape of the material. The outer excess material is not removed as a whole, making it more easily deformable relative to the product during the cutting process. More stress during the punching process is distributed to the removed excess material, and the stress is released by the deformation of the excess material, thereby reducing the impact of stress on the product and minimizing quality degradation.

Description

Technical Field

[0001] This invention relates to the field of bead cutting and forming technology, and more specifically to a bead cutting and forming apparatus for chips. Background Technology

[0002] A chip, also known as a microcircuit, microchip, or integrated circuit, refers to a silicon wafer containing integrated circuits. It is very small and often part of a computer or other electronic device. In integrated circuit packaging, the injection-molded integrated circuit substrate needs to be punched. In existing integrated lead-cutting systems, after the chip is injection-molded, a transmission mechanism is typically used to move the integrated circuit substrate to the punching unit. Similarly, when punching the chips sequentially onto the substrate, a transmission mechanism is needed to move the substrate. After punching, a transmission mechanism is also needed to separate and discharge the material.

[0003] During the process of separating the product from the excess board material, the integrated circuit board material may deform or even become defective at the separation and punching position due to stress caused by the pressure or impact of the cutting tool on the chip. Severe deformation may affect the quality of the chip, resulting in defects or installation problems. Summary of the Invention

[0004] The technical problem solved by this invention is: during the process of separating the product from the excess board material by punching, the integrated circuit board material may be deformed at the separation punching position due to stress caused by the pressure or impact of the cutting tool on the chip. When the deformation is severe, it may affect the quality of the chip, resulting in defects or installation problems.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A chip lead cutting and forming apparatus, comprising:

[0007] A conveying mechanism is used to convey materials intermittently, and the distance of each movement is matched with the size of the materials;

[0008] A tendon cutting mechanism is located above a conveying mechanism. The tendon cutting mechanism includes a power component and a tendon cutting cutter, and the power component drives and connects to the tendon cutting cutter.

[0009] The rib cutting tool includes an opening and a slitting section, with the opening fixedly disposed on the side of the slitting section;

[0010] The shape formed by the slitting section matches the shape of the material. The slitting section is provided with a slitting start point and a slitting end point. The slitting start point is located at the position where the opening is connected to the slitting section. The height of the slitting section gradually increases from the slitting start point to the slitting end point.

[0011] As a further aspect of the present invention: the cutting start point is located directly below the cutting end point.

[0012] As a further aspect of the present invention: the cutting portion includes a first blade, a second blade, a third blade, and a fourth blade, the first blade and the opening are located on the same straight line, the third blade is opposite to the first blade, and the cutting endpoint is located on the third blade.

[0013] As a further aspect of the present invention, the height of the end of the opening away from the cutting portion is lower than the height of the other end.

[0014] As a further aspect of the present invention, the longitudinal section of the opening is V-shaped.

[0015] As a further aspect of the present invention: the upper dimension of the longitudinal cross-sectional profile of the slit portion is larger than the lower dimension, and the inner wall of the slit portion is vertically arranged.

[0016] As a further aspect of the present invention: the conveying mechanism includes a detection station, and a detector is disposed directly above the detection station.

[0017] According to the present invention, a chip lead cutting and forming apparatus has at least one of the following technical effects:

[0018] In existing punching processes, the remaining material around the product is often punched off as a whole, and then the product and the remaining material are separated. Because the remaining material is removed as a whole, the overall strength of the remaining material and the overall strength of the product are not significantly different, making both the remaining material and the product prone to deformation when impacted by the cutting tool. This deformation can lead to quality issues. In this invention, the cutting edge of the cutting section is set at an angle (i.e., the cutting edges are set at unequal heights, creating a time difference in contact between the cutting edge and the product). During cutting, it can sequentially cut along the outer perimeter of the product. Furthermore, an opening is provided to cut a slit in the outer remaining material, allowing the removed material to be strip-shaped. The strip-shaped remaining material has significantly reduced bending strength compared to the original frame-shaped removal. Thus, the outer remaining material is not removed as a whole, making it more prone to deformation relative to the product during the cutting process. More stress from the punching process is distributed to the removed remaining material, and the deformation of the remaining material releases the stress, thereby reducing the impact of stress on the product and minimizing quality degradation.

[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a schematic diagram of the existing overall segmentation structure;

[0022] Figure 2 This is a schematic diagram of the structure of the cut for separating the residual material from the product in this invention;

[0023] Figure 3 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the rib-cutting tool of the present invention;

[0025] Figure 5 This is the present invention. Figure 4 A schematic diagram of the mid-section structure;

[0026] Figure 6 This is one embodiment of the slitting part of the present invention ( Figure 4 A structural diagram (from a right-view perspective);

[0027] Figure 7 This is the present invention. Figure 6 A schematic diagram of the structure corresponding to the separation trajectory of the cutting part;

[0028] Figure 8 This is another embodiment of the slitting part of the present invention ( Figure 4 A structural diagram (from a left-side viewpoint);

[0029] Figure 9 This is the present invention. Figure 8 A schematic diagram of the structure corresponding to the separation of the cutting path.

[0030] In the diagram: 10, power assembly; 20, rib cutting tool; 21, opening; 22, slitting section; 30, inspection station; 40, leftover material; 50, product. Detailed Implementation

[0031] The technical solutions of the embodiments 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, and 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.

[0032] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this 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. Therefore, they should not be construed as limiting this invention.

[0033] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0034] Chip die cutting, also known as integrated circuit board die cutting and separation, involves cutting away excess board material around the product. Current die cutting processes often involve cutting away this excess material simultaneously, followed by separation of the product from the excess. Because the excess material is removed as a whole, the overall strength of the excess material is not significantly different from the overall strength of the product, making both prone to deformation under impact from the cutting tool. This deformation can lead to quality issues. To address this problem, the applicant has made several attempts, such as adding supports at the bottom of the product to prevent deformation. However, full support can easily damage the cutting tool and make the product more susceptible to hard impacts. While partial support structures create space at the cutting point, the excess material still experiences impact and stress during separation, making deformation unavoidable. In this invention, the cutting edge of the slitting section is set at an angle (i.e., the cutting edges are set at unequal heights, resulting in a time difference in contact between the cutting edge and the product). During slitting, it can sequentially slit along the outer perimeter of the product. Furthermore, an opening is provided to cut an opening in the outer excess material, allowing the removed excess material to be in the form of a strip. Compared to the original frame-shaped removal of excess material, the bending strength of the strip-shaped excess material is significantly reduced. Thus, the outer excess material is not removed as a whole, making it more easily deformed relative to the product during the cutting process. More of the stress during the punching process is distributed to the removed excess material, and the stress is released by the deformation of the excess material, thereby reducing the impact of stress on the product and reducing quality degradation.

[0035] Please see Figure 1-9As shown, the present invention is a chip cutting and forming device, including a conveying mechanism and a cutting mechanism. The conveying mechanism is used to convey materials intermittently, and the distance of each movement matches the size of the material. The cutting mechanism is located above the conveying mechanism and includes a power component 10 and a cutting blade 20. The power component 10 drives and connects to the cutting blade 20. The cutting blade 20 includes an opening 21 and a cutting section 22. The opening 21 is fixedly disposed on the side of the cutting section 22. The shape formed by the cutting section 22 matches the shape of the material. The cutting section 22 is provided with a cutting start point and a cutting end point. The cutting start point is located at the position where the opening 21 is connected to the cutting section 22. The height of the cutting section 22 gradually increases from the cutting start point to the cutting end point.

[0036] Please see Figure 3 In one embodiment of the present invention, the conveying mechanism is used to transport materials intermittently, and the distance of each movement matches the size of the material. The conveying mechanism is mounted on the main body of the equipment and is used to drive the materials to move intermittently. The specific structure of the conveying mechanism is not limited and may include a fixed guide rail corresponding to the material, allowing the material to move along the guide rail. Then, a movable support is provided, and two linear drive components drive the movable support in two directions respectively. The movable support rises from a low position to a high position and lifts the material, causing the material to detach from the fixed support. Then, another linear drive component drives the movable support to move laterally a fixed distance (matching the size of product 50, so that the cutter can sequentially cut adjacent products 50). Then, the movable support descends, causing the material to fall onto the fixed support. Then, the movable support returns to its original position while maintaining the low position, and this process is repeated to achieve intermittent material transport.

[0037] Please see Figure 3 In one embodiment of the present invention, a certain position of the main body of the equipment is a cutting position, and a cutting support can be set at this position. The cutting support is located on the conveying path of the conveying mechanism, and the cutting support can have a slot or notch that matches the cutting blade 20, so as to support the material while allowing the cutting space to flow out. The cutting mechanism is located directly above the cutting support and is used to punch and separate the product 50 to remove the excess material 40. The cutting mechanism includes a power component 10 and a cutting blade 20. The power component 10 is used to drive the cutting blade 20 to move up and down. When moving downward, it approaches the product 50 until the cutting action is completed. After the punching action is completed, the power component 10 drives the cutting blade 20 to move upward and reset. The power component 10 can be a cylinder or a hydraulic cylinder.

[0038] Please see Figure 4-5In one embodiment of the present invention, the cutting tool 20 includes an opening 21 and a slitting portion 22, the opening 21 being fixedly disposed on the side of the slitting portion 22; thereby enabling an opening to be cut into the frame-shaped scrap 40 outside the product 50. The horizontal and vertical portions of the frame-shaped scrap 40 support each other, resulting in higher strength of the scrap 40 portion. Consequently, when cutting the scrap 40 and the product 50, both will share the stress and deform simultaneously. Cutting an opening into the scrap 40 first prevents the scrap 40 from becoming a single unit, providing a gap for stress release during cutting. Furthermore, the height of the end of the opening 21 furthest from the slitting portion 22 is lower than the height of the other end. This allows the opening to be gradually formed from the outside in, avoiding a large impact caused by the blade of the opening 21 contacting the material simultaneously. The longitudinal cross-sectional shape of the opening 21 can be V-shaped or triangular. When it is triangular, it includes a vertical side and an inclined side. The inclined side is located on the side away from the product 50 so that when the blade of the opening 21 cuts the material, it can squeeze outward and reduce the impact on the product 50.

[0039] Please see Figure 4-5 In one embodiment of the present invention, the shape formed by the slitting portion 22 matches the shape of the material. The lower end of the slitting portion 22 is a blade portion, thereby enabling the slitting portion 22 to complete the slitting and separation of the product 50 and the excess material 40 along the edge of the product 50 during its downward movement. The slitting portion 22 is provided with a slitting start point and a slitting end point. The slitting start point is located at the position where the opening 21 connects to the slitting portion 22, and the height of the slitting portion 22 gradually increases from the slitting start point to the slitting end point. That is, the blade portion at the bottom of the slitting portion 22 is inclined, with the blade height at the slitting start point being the lowest and contacting the material first as the cutting tool 20 descends. The blade height at the slitting end point is the highest, and it contacts the material last compared to the blades at other positions as the cutting tool 20 descends. In other words, different positions of the blade contact the material at different times, and the contact time with the material proceeds sequentially from the opening position, giving the slitting a sequential process, reducing the instantaneous impact, and minimizing deformation.

[0040] Please see Figure 6-9 In one embodiment of the present invention, the starting point and ending point of the slitting can be selected according to actual conditions. Since the chip product 50 is typically square, a square shape is used as an example. The slitting section 22 includes a first blade, a second blade, a third blade, and a fourth blade connected in sequence. The third blade is opposite to the first blade, the first blade and the opening 21 are on the same straight line, and the fourth blade is perpendicular to the slitting section 22. In actual production, the opening 21 can also be arranged at an angle to the first blade, so that the opening cut by the opening 21 on the remaining material 40 is in an inclined state (as shown in the attached diagram). Figure 7 middle).

[0041] Please see Figure 6-7 In one embodiment of the present invention, the cutting start point can be located directly below the cutting end point. That is, the cutting start point is formed at the intersection of the opening 21 and the fourth cutting edge, while the cutting end point is formed above the corner of the rib cutting tool 20 where the first and fourth cutting edges intersect. The four cutting edges gradually rise from the cutting start point to the cutting end point, and the four cutting edges after unfolding from the cutting start point and the cutting end point have an oblique line structure.

[0042] Please see Figure 8-9 In one embodiment of the present invention, the cutting endpoint can be located on the third blade. In the accompanying drawings, the cutting endpoint is located in the middle of the third blade. Alternatively, the cutting endpoint can be set at the intersection of the side walls where the second and third blades are located. In this case, after the opening 21 opens on the remaining material 40, the fourth blade to the third blade and the first blade to the second blade form two synchronous cutting routes, which can shorten the cutting time.

[0043] Please see Figure 5 In one embodiment of the present invention, the upper dimension of the longitudinal cross-sectional profile of the cutting portion 22 is larger than the lower dimension, and the inner wall of the cutting portion 22 is vertically arranged. That is, the blade at the bottom of the cutting portion 22 is triangular in shape, the inner side of the blade is vertical towards the product 50, and the outer side of the blade is inclined towards the scrap 40. In this way, the scrap 40 will be relatively squeezed outward during cutting, ensuring the separation of the scrap 40 while allowing more of the cutting deformation to be distributed on the scrap 40.

[0044] Please see Figure 3In one embodiment of the present invention, the conveying mechanism includes a detection station 30, and a detector is disposed directly above the detection station 30. The detector is a distance sensor. In use, an annular area can be set as a detection area around the outer ring of the product 50, and detection points can be selected within the annular area. The detection points are evenly distributed along the circumference of the product 50. By detecting the height dimension at different positions in the annular area, the deformation of the outer circumference of the product 50 can be detected. The distance data acquired by the distance sensor can be uploaded to the controller for processing. After processing, the deformation is judged. If the deformation exceeds a preset maximum allowable value, a signal or warning message can be issued to remind the staff to check, or different conveying components can be set to convey the product in different directions to complete the diversion of the product 50 and prevent defective products from flowing to the next process or to the customer. Furthermore, a second annular detection area can be set on the outside of the product 50. By uniformly selecting detection points around the circumference of the second annular detection area, it can be used to detect whether the residual material 40 is completely separated from the product 50. Because the height data that can be detected when the residual material 40 is present and when it is completely separated from the product 50 will be different, when the residual material 40 is not present, a corresponding signal can be issued to remind the staff to take appropriate action.

[0045] The working principle of this invention is as follows: The conveying mechanism drives the material to move intermittently. During the period when the material is stationary, the power component 10 drives the cutting blade 20 to move downward. During this process, the outer end of the opening 21 contacts the material first, and the material is cut from the outer end to form an opening until the opening is completely cut. After the opening is cut first, the remaining material 40 is a whole, but the cutting position is located at the remaining material 40. Therefore, the main bearing point is on the remaining material 40, and the impact on the product 50 is small, avoiding deformation of the product 50 due to stress. Then, the blade at the starting position of the cutting part 22 contacts the top surface of the material. As the cutting blade 20 continues to fall, the remaining material 40 and the product 50 are sequentially cut and separated along the axial direction of the product 50 according to the different height positions of the blade of the cutting part 22. Because the height of the cutting edge at the bottom of the slitting section 22 gradually increases from the slitting start point to the slitting end point, the remaining material 40 around the product 50 is sequentially slitted from the slitting start point to the slitting end point during the descent of the cutting blade 20. This results in a smaller impact force on the material at the same time, reducing the possibility of material deformation. Simultaneously, the presence of an opening in this slitting process causes the remaining material 40 to separate into strips. These strip-shaped remaining material 40 are more easily deformed during punching compared to the original frame-shaped remaining material 40. This means that the deformation caused by the force during slitting is more concentrated in the removed remaining material 40, thereby reducing the deformation of the product 50 itself and ensuring the processing quality of the product 50. When the slitting end point moves below the product 50, one punching action is completed. The cutting blade 20 returns to its original position, the conveying mechanism moves the material once, and the next product 50 moves to the slitting position.

[0046] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the scope of the claims.

Claims

1. A chip lead cutting and forming apparatus, characterized in that, The application relates to a cutting mechanism for cutting off the excess part of a material, comprising: a conveying mechanism for conveying the intermittent movement of the material, and the distance of each movement is matched with the size of the material; a cutting mechanism located above the conveying mechanism, the cutting mechanism comprising a power assembly (10) and a cutting knife (20), the power assembly (10) being drivingly connected with the cutting knife (20); the cutting knife (20) comprising an opening part (21) and a cutting part (22), the opening part (21) being fixedly arranged on the side of the cutting part (22); the cutting part (22) is matched with the shape of the material, and the cutting part (22) is provided with a cutting starting point and a cutting ending point, the cutting starting point being located at the position where the opening part (21) is connected with the cutting part (22), and the height position of the cutting part (22) gradually increases from the cutting starting point to the cutting ending point; the cutting starting point is located directly below the cutting ending point. The cutting part (22) comprises a first blade, a second blade, a third blade and a fourth blade, the first blade is located on the same line with the opening part (21), the third blade is opposite to the first blade, and the cutting ending point is located on the third blade. The height position of one end of the opening part (21) away from the cutting part (22) is lower than that of the other end. The longitudinal section of the opening part (21) is V-shaped. The size of the upper end of the longitudinal section profile of the cutting part (22) is larger than that of the lower end, and the inner wall of the cutting part (22) is vertically arranged. The conveying mechanism comprises a detection station (30), and a detector is arranged above the detection station (30).

2. The apparatus for trimming and forming of a chip according to claim 1, wherein ​ 3. The apparatus for trimming and forming of a chip according to claim 1 or 2, wherein ​ 4. The apparatus for trimming and forming of a chip according to claim 3, wherein ​ 5. The apparatus for trimming and forming of a chip according to claim 4, wherein ​ 6. The apparatus for trimming and forming of a chip according to claim 1, wherein ​

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