Adjustable cutting tool for semiconductor packaging rib cutting and forming

Abstract

The utility model relates to an adjustable semiconductor packaging trimming forming cutter, which comprises a cutter holder, a first cutter edge base and a second cutter edge base, the cutter holder is composed of a cutter gasket, a cutter mounting seat and a cutter, one side face of the cutter mounting seat is attached to the cutter gasket, a movable clamping groove is arranged in the cutter mounting seat, and the first cutter edge base and the second cutter edge base are arranged in the movable clamping groove. A cutter is vertically inserted into the movable clamping groove, the cutter through hole is in clearance fit with the connecting shaft, and the area of the cutter is smaller than that of the movable clamping groove, so that the cutter can incline leftwards and rightwards; the first knife edge base is arranged at the position, close to the middle of the cutter, of the outer side of the cutter in a sleeving mode through the first knife edge groove, and a second knife edge groove penetrating through the second knife edge base is formed in the position, corresponding to the first knife edge groove, of the middle of the second knife edge base. The device has the advantages of being compact and reasonable in structure, convenient to use, high in adjustability and the like.

Description

Technical Field

[0001] The utility model belongs to the field of semiconductor packaging, relates to power semiconductor packaging, and in particular to a device for controlling the curvature of a bonding lead. Background Art

[0002] The rib cutting and forming process is an essential and important process for semiconductor packaging products. The rib cutting and forming mold is used to cut off the connection between the module pin dam and the outer frame, separate the lead frame in the product intactly, and bend the external terminals of the module product to the corresponding angle to meet customer needs.

[0003] As enterprises have higher requirements for module installation, the position and bending angle standards for product signal terminals have become increasingly stringent. In the actual production process, module products with arranged terminals will be subjected to uneven forces during the rib cutting and forming process, resulting in inconsistent bending, which will cause the strips to fail to fit into the PCB board during the actual installation process. In addition, due to the inconsistency of installation requirements of different customers for the same product and the differences in stamping equipment, there is a higher demand for interchangeability and flexible adjustment of rib cutting and forming tools during the production process, in order to meet the needs of good terminal position accuracy and targeted improvement of individual terminals. To this end, an adjustable semiconductor package rib cutting and forming tool is designed to overcome the above problems. Utility Model Content

[0004] The utility model aims to overcome the shortcomings of the prior art and provide an adjustable semiconductor package cutting and forming tool which has a compact and reasonable structure, is easy to use and has strong adjustability.

[0005] The utility model is realized through the following technical scheme: an adjustable semiconductor package cutting rib forming tool, comprising a tool seat, a first blade base and a second blade base, the tool seat is composed of a tool gasket, a tool mounting seat and a tool, one side of the tool mounting seat is fitted on the tool gasket, a movable card slot is arranged in the tool mounting seat, a tool is vertically inserted in the movable card slot, a first through hole and a second through hole for mounting a connecting shaft are respectively opened on both sides of the movable card slot and on the side bodies of the tool mounting seat on both sides, and mounting holes are arranged on the tool at positions corresponding to the first through hole and the second through hole, after the connecting shaft passes through the first through hole, the mounting hole and the second through hole in sequence, the tool is mounted on the tool mounting seat, and the gap between the tool through hole and the connecting shaft The area of ​​the tool is smaller than that of the movable slot, so that the tool can be tilted left or right; a first blade groove is provided in the middle of the first blade base and passes through the first blade base, and the first blade base is sleeved on the outside of the tool near the middle of the tool through the first blade groove, and a second blade base is provided at the end of the tool away from the tool gasket, and a second blade groove is provided in the middle of the second blade base corresponding to the first blade groove and passes through the second blade base, the second blade base is installed in the lower mold of the mold, the module to be formed is placed on the surface of the second blade base, the first blade base and the knife seat are installed in the upper mold of the mold, and the upper and lower molds are closed by the stamping equipment, and the first blade base presses the terminal root of the module on the surface of the second blade base.

[0006] Preferably: a raised portion is provided on the side of the tool mounting seat away from the tool gasket, the raised portion is close to the tool and is used to limit and assist in supporting the tool, a transverse mounting hole is provided on the side of the raised portion close to the tool, a compression spring is horizontally installed in the transverse mounting hole, and a transverse threaded hole is correspondingly provided on the side of the tool mounting seat on one side of the compression spring, a top screw is horizontally installed in the transverse threaded hole, the top screw supports the compression spring, and is used to provide buffering when the tool is pressed down and tilted, and to reset the tool when it rises.

[0007] Preferably: a first mounting groove and a second mounting groove are provided at the middle and end positions of the tool, wherein a roller is installed in the first mounting groove through a bearing, and a roller is installed in the second mounting groove through a bearing, and the roller presses against the inner wall of the first blade base when the tool is tilted, and can roll on the inner wall, thereby reducing friction and providing lateral support for the tool; the rollers are multiple and arranged in a single row in parallel, each roller corresponds to a terminal of the module one by one, and is used to improve the individual offset problem of the arranged terminals; the diameters of the rollers and the rollers are used to adjust the bending point and bending angle of the tool, and the area of ​​the movable slot is used to adjust the tilt angle of the tool.

[0008] Preferably, mounting seat baffles are installed at the first through hole and the second through hole of the tool mounting seat respectively, so as to protect the connecting shaft and prevent the connecting shaft from shifting during operation.

[0009] Preferably, the tool gasket is made of rubber or plastic, and the thickness of the tool gasket is used to adjust the cutting depth, bending angle and molding mark length of the tool.

[0010] Preferably, roller baffles are installed at both ends of the roller, located on both sides of the cutter, to protect the roller and the bearing and prevent the roller from shifting during operation.

[0011] The beneficial effects of the utility model are as follows:

[0012] The utility model adjusts the bending angle of the tool by arranging a tool mounting seat of a split structure, and adjusts the cutting depth of the tool during the overall punching by installing a tool gasket under the tool mounting seat. The tool and the tool mounting seat are coaxially matched and have left and right mobility. With a roller and a compression spring, the knife drop position can be flexibly adjusted and constrained. The roller diameter controls the bending angle range, and finally the roller knife diameter controls the final bending accuracy. In addition, a one-to-one method can be used to adjust the corresponding roller knife diameter to solve the problem of inconsistent bending angles caused by uneven force during the downward pressing of the side-by-side needle feet; at the same time, the roller contacts the side of the notch of the first blade base during the downward pressing process, thereby reducing friction and providing lateral support force, thereby greatly extending the service life of the cutter on the basis of achieving angle control. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the internal structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the external structure of the utility model. DETAILED DESCRIPTION

[0015] In order to enable ordinary technicians in the field to more clearly understand the purpose, technical solutions and advantages of the utility model, the utility model is further explained below in conjunction with the accompanying drawings and embodiments.

[0016] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "horizontal" and "vertical" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention. They do not indicate or imply that the device or component referred to must have a specific direction and therefore should not be understood as a limitation on the present invention.

[0017] The utility model will be described in detail below with reference to the accompanying drawings: Figure 1-2As shown, an adjustable semiconductor package cutting rib forming tool comprises a tool holder 1, a first blade base 2 and a second blade base 3, characterized in that: the tool holder 1 is composed of a tool gasket 4, a tool mounting seat 5 and a tool 16, one side of the tool mounting seat 5 is fitted on the tool gasket 4, a movable card slot 6 is arranged in the tool mounting seat 5, and the tool 16 is vertically inserted into the movable card slot 6, and through holes 8 for installing a connecting shaft 7 are respectively opened on both sides of the movable card slot 6 and located on both sides of the side body of the tool mounting seat 5, and mounting holes 9 are arranged on the tool 16 at the positions corresponding to the through holes 8, and after the connecting shaft 7 passes through the mounting holes 9, its two ends are fixed in the through holes 8 of the tool mounting seat 5, and the tool 16 is installed on the tool mounting seat 5, and the tool mounting hole 9 and the connecting shaft 7 are clearance-matched and the area of ​​the tool 16 The area of ​​the tool 16 is smaller than that of the movable slot 6, so that the tool 16 can be tilted left and right; a first blade groove 10 penetrating the first blade base 2 is provided in the middle position of the first blade base 2, and the first blade base sleeve 2 is arranged on the outside of the tool 16 near the middle position of the tool through the first blade groove 10, and a second blade base 3 is provided at the end of the tool 16 on the side away from the tool gasket 4, and a second blade base 3 is provided at the middle position of the second blade base 3 corresponding to the first blade groove 10 Penetrating the second blade base 3 is provided, the second blade base 3 is installed at the lower mold of the mold, the module to be formed is placed on the surface of the second blade base 3, the first blade base 2 and the knife seat 1 are installed at the upper mold of the mold, and the upper and lower molds are closed by a stamping equipment, and the first blade base 2 presses the terminal root of the module on the surface of the second blade base 3.

[0018] The cutter of the utility model is inclined at an angle to the right after being constrained by the compression spring and the top wire, and can roll during the downward pressing process of the roller to reduce friction, increase buffering and provide lateral supporting force.

[0019] The tool 16 mounting seat is provided with a raised portion 22 on the side away from the tool gasket 4. The raised portion 22 is in close contact with the tool 16 and is used to limit and assist in supporting the tool 16. A transverse mounting hole 12 is provided on the side of the raised portion 22 close to the tool 16. A compression spring 13 is horizontally installed in the transverse mounting hole 12. A transverse threaded hole 14 is correspondingly provided on the side of the tool mounting seat 5 on one side of the compression spring 13. A top screw 15 is horizontally installed in the transverse threaded hole 14. The top screw 15 supports the compression spring 13 and is used to provide buffering when the tool 16 is pressed down and tilted, and to reset the tool 16 when it rises.

[0020] The middle and end positions of the tool 16 are provided with a first mounting groove 17 and a second mounting groove 18, wherein a roller 19 is mounted in the first mounting groove 17 via a bearing 23, and a roller 20 is mounted in the second mounting groove 18 via a bearing 23, and the roller 19 abuts against the inner wall of the first blade base 2 when the tool 16 is tilted, and can roll on the inner wall, thereby reducing friction and providing lateral support for the tool 16; the rollers 20 are multiple and arranged in a single row in parallel, and each roller 20 corresponds to a terminal of the module one by one, so as to improve the individual offset problem of the arranged terminals; the diameters of the rollers 19 and the rollers 20 are used to adjust the bending point and bending angle of the tool, and the area size (width size) of the movable slot 6 is used to determine the tilt angle of the tool 16.

[0021] The through holes 8 of the tool mounting seat 5 are respectively provided with mounting seat stops 21, which are used to protect the connecting shaft 7 and prevent the connecting shaft 7 from shifting during operation. The tool gasket 4 is made of rubber or plastic, and the thickness of the tool gasket 4 is used to adjust the cutting depth, bending angle and molding mark length of the tool 16. The roller stops 24 are respectively provided on the two ends of the roller 19, which are located on the sides of the tool 16, to protect the roller 19 and the bearing and prevent the roller 19 from shifting during operation.

[0022] The working process of the utility model is as follows:

[0023] First, the second blade base is installed on the lower mold of the mold, the first blade base and the knife seat are installed on the upper mold, and then the module to be formed is placed on the surface of the second blade base, and the upper and lower molds are closed by the stamping equipment. The first blade base presses the root of the terminal on the surface of the second blade base. During the pressing process of the knife seat, after the roller begins to contact, since the tool itself is tilted to the right, the roller will roll against the inner wall of the first blade base during the pressing process, thereby providing lateral support for the tool and reducing friction. At the same time, as the roller continues to press down, the tool will slightly deviate in the opposite direction, and the compression spring will provide buffering. When the stamping is completed, the tool is reset by the compression spring, and the tool reset is tilted to the right. In this embodiment, the internal threaded hole of the tool 7 corresponds to the internal hole position of the tool mounting base 3, and the top screw 4 in the threaded hole can support the compression spring to constrain the tool 7, and play a buffering role when the tool 7 tilts to the left when pressed down, and plays a reset role when it rises.

[0024] In this embodiment, the thickness of the tool gasket determines the cutting depth, bending angle and length of the forming mark. The size of the movable slot of the tool and the tool mounting base, combined with the roller and the wheel, can affect the bending cutting point and angle of the tool. The larger the diameter of the roller and the wheel, the smaller the bending angle of the terminal, and vice versa. The roller and the terminal correspond one-to-one, which improves the problem of individual offset of the arranged terminals and allows flexible adjustment in three stages.

[0025] In this embodiment, the cutter is tilted to the right after being constrained, and rolling occurs during the downward pressing process of the roller to reduce friction, and the first cutter base provides lateral support force.

[0026] The specific embodiments described herein are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. An adjustable semiconductor package cutting and forming tool, comprising a tool holder (1), a first blade base (2) and a second blade base (3), characterized in that: The tool seat (1) is composed of a tool gasket (4), a tool mounting seat (5) and a tool (16); one side surface of the tool mounting seat (5) is fitted on the tool gasket (4); a movable slot (6) is provided in the tool mounting seat (5); a tool (16) is vertically inserted into the movable slot (6); through holes (8) for mounting a connecting shaft (7) are respectively provided on both sides of the movable slot (6) and on both sides of the tool mounting seat (5); and mounting holes (9) are provided on the tool (16) at positions corresponding to the through holes (8); after the connecting shaft (7) passes through the mounting holes (9), both ends of the connecting shaft (7) are fixed in the through holes (8) of the tool mounting seat (5); the tool (16) is mounted on the tool mounting seat (5); the tool mounting holes (9) and the connecting shaft (7) are clearance-matched and the area of ​​the tool (16) is smaller than the area of ​​the movable slot (6), so that the tool (16) ) can be tilted left and right; a first blade groove (10) penetrating the first blade base (2) is provided at the middle position of the first blade base (2); the first blade base (2) is sleeved on the outside of the tool (16) near the middle position of the tool through the first blade groove (10); a second blade base (3) is provided at the end of the tool (16) on the side away from the tool gasket (4); a second blade groove (11) penetrating the second blade base (3) is provided at the middle position of the second blade base (3) corresponding to the first blade groove (10); the second blade base (3) is installed at the lower mold of the mold; the module to be formed is placed on the surface of the second blade base (3); the first blade base (2) and the blade seat (1) are installed at the upper mold of the mold; the upper and lower molds are closed by a stamping device; the first blade base (2) presses the terminal root of the module on the surface of the second blade base (3).

2. The adjustable semiconductor package cutting and forming tool according to claim 1, characterized in that: A protrusion (22) is provided on the side of the tool (16) mounting seat away from the tool gasket (4), the protrusion (22) is in close contact with the tool (16) and is used to limit and assist in supporting the tool (16), a transverse mounting hole (12) is provided on the side of the protrusion (22) close to the tool (16), a compression spring (13) is horizontally installed in the transverse mounting hole (12), and a transverse threaded hole (14) is correspondingly provided on the side of the tool mounting seat (5) on one side of the compression spring (13), a top screw (15) is horizontally installed in the transverse threaded hole (14), the top screw (15) supports the compression spring (13) and is used to provide a buffer when the tool (16) is pressed down and tilted, and to reset the tool (16) when it rises.

3. The adjustable semiconductor package cutting and forming tool according to claim 2, characterized in that: A first mounting groove (17) and a second mounting groove (18) are provided at the middle and end positions of the tool (16), wherein a roller (19) is mounted in the first mounting groove (17) via a bearing, and a roller (20) is mounted in the second mounting groove (18) via a bearing (23); when the tool (16) is tilted, the roller (19) abuts against the inner side wall of the first blade base (2) and can roll on the inner side wall, thereby reducing friction and providing lateral support force for the tool (16); the rollers (20) are multiple and arranged in a single row in parallel, each roller (20) corresponding to a terminal of the module one by one, and are used to improve the problem of individual offset of the arranged terminals; the diameters of the rollers (19) and the rollers (20) are used to adjust the bending point and bending angle of the tool, and the area of ​​the movable slot (6) is used to adjust the tilt angle of the tool (16).

4. The adjustable semiconductor package cutting and forming tool according to claim 2, characterized in that: Mounting seat stops (21) are respectively mounted correspondingly at the through holes (8) of the tool mounting seat (5) for protecting the connecting shaft (7) and preventing the connecting shaft (7) from shifting during operation.

5. The adjustable semiconductor package cutting and forming tool according to claim 2, characterized in that: The tool gasket (4) is made of rubber or plastic, and the thickness of the tool gasket (4) is used to adjust the cutting depth, bending angle and molding mark length of the tool (16).

6. The adjustable semiconductor package cutting and forming tool according to claim 3, characterized in that: Roller baffles (24) are respectively installed on both ends of the roller (19) and on the sides of the cutter (16) to protect the roller (19) and the bearing and prevent the roller (19) from shifting during operation.

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