A circuit board cutting device

Abstract

The present invention discloses a circuit board pin trimming device, specifically for integrated circuit manufacturing. The device comprises a pin trimming mechanism and clamping slots slidably mounted on the end surface of a rectangular guide frame and distributed along four corresponding sides. The four clamping slots are driven toward the center of the rectangular guide frame to clamp the circuit board and cooperate with the pin trimming mechanism. Adjacent side surfaces of the four clamping slots are each open, with a U-shaped rubber insert fixedly mounted within the opening. This invention has a simple structure and is quick and easy to operate. It ensures coordination between the pin trimming mechanism and the fixed frame during the trimming process, thereby ensuring a high yield rate for the printed circuit board's appearance after trimming.

Description

Technical Field

[0001] The present invention relates to integrated circuit manufacturing, and in particular to a circuit board pin cutting processing device. Background Art

[0002] Integrated circuit manufacturing, also known as integrated circuit board manufacturing, includes PCBA, PCB, and FPC. In its manufacturing process, there is a process called pin trimming, which means that after the component pins have been inserted into the circuit board and soldered, the exposed part of the solder joint is trimmed with professional pliers.

[0003] The purpose of cutting is to avoid the exposed pins from being close to each other and causing the pins to be skewed due to bumps during installation. If the two pins touch or the spacing is extremely small, it may cause a short circuit, thereby causing a short circuit or damage to the circuit board.

[0004] Currently, there are two modes for cutting circuit board pins on the market: manual or machine. Due to the demand for batch production, machine cutting is the mainstream mode. Commonly used equipment includes but is not limited to:

[0005] For example, Chinese patent publication number CN119500917A discloses a fully automatic leg cutting device;

[0006] Another example is a Chinese patent, with authorization publication number CN118682039B, which discloses a fully automatic shearing device for PCB component pins.

[0007] In the prior art including the two patents mentioned above, the pin shearing equipment mainly includes the following core components: a pin shearing mechanism, a magnetic field generating device and an electromagnetic positioning device, a suction mechanism, and other additional mechanisms such as a fixed frame. The other additional mechanisms are used to cooperate with the pin shearing mechanism to realize automatic loading and unloading and continuous cutting, thereby making the pin shearing equipment more intelligent and requiring less manual intervention, but the corresponding procurement cost of the pin shearing equipment is higher. Therefore, the mainstream pin shearing equipment mainly includes the several core parts listed above, so the loading and unloading of circuit boards are completely performed manually. The fixed frame mentioned above adopts a pressing method to fix the circuit board. The circuit board is manually placed on the fixed frame. It is necessary to observe with the naked eye the area of ​​the four adjacent sides of the circuit board that are negatively pressurized, that is, the negative pressure is applied to the edge of the circuit board to ensure that the circuit board will not collapse and break due to the negative pressure on the edge, thereby reducing the yield rate of the circuit board appearance after pin shearing. Summary of the Invention

[0008] The purpose of the present invention is to provide a circuit board leg cutting processing device for solving the above-mentioned problems.

[0009] In order to achieve the above object, the present invention provides the following technical solutions:

[0010] A circuit board pin shearing device includes a pin shearing mechanism and clamping grooves slidably mounted on the end surface of a rectangular guide frame and distributed along four side edges in a one-to-one correspondence. The four clamping grooves are driven to converge toward the center of the rectangular guide frame to clamp the circuit board and cooperate with the pin shearing mechanism.

[0011] The adjacent side surfaces of the four clamping grooves are all open, and a U-shaped rubber software is fixedly installed in the opening.

[0012] Preferably, the invention further comprises a bridging portion which is vertically distributed parallel to the rectangular guide rail frame and is axially rotatably connected and assembled with the four clamping groove members through connecting rods;

[0013] Wherein, the bridging portion is driven to move vertically.

[0014] Preferably, the inner walls on opposite sides of the U-shaped rubber soft material are respectively fixedly provided with a plurality of rubber protrusions distributed in a linear array;

[0015] The end of the rubber protrusion is inclined toward the end of the U-shaped rubber soft part, and the end surface of the rubber protrusion faces the end of the U-shaped rubber soft part.

[0016] Preferably, the lengths of the plurality of rubber protrusions located on the same horizontal plane increase in sequence from the end of the U-shaped rubber soft part inward.

[0017] Preferably, it further comprises an elastic metal groove, wherein the elastic metal groove comprises a U-shaped mounting groove, and the U-shaped rubber software is fixedly mounted in the U-shaped mounting groove;

[0018] Both ends of the U-shaped mounting groove are respectively fixedly provided with connecting parts that are fixedly connected to the open cross-section of the clamping groove member, and the connecting parts are inclinedly distributed.

[0019] Preferably, the clamping slot is a C-shaped structure, with notches symmetrically provided on its side, and the portion between the two notches is an elastic connecting portion, and the connecting portion is fixedly connected to the elastic connecting portion.

[0020] Preferably, the end portion of the connecting portion connected to the U-shaped mounting groove is a special-shaped piece, and the special-shaped piece has at least two rectangular groove-shaped pieces formed by bending;

[0021] The rectangular slot-shaped member is distributed obliquely, and has two adjacent surfaces distributed toward one side of the U-shaped mounting slot, so as to form a circular vertex that contacts the inserted circuit board;

[0022] An elastic rubber cushion strip with an arc surface is fixedly arranged on the outer side of the circular top corner.

[0023] Preferably, the two rectangular trough-shaped members are distributed obliquely and in an opposite direction to the inclination of the connecting portion;

[0024] The ends of the two rectangular slot-shaped members on one side adjacent to the U-shaped mounting groove are respectively bent to form a V-shaped bending portion;

[0025] The two V-shaped bending portions face opposite directions, and the vertex of one of the V-shaped bending portions adjacent to the U-shaped mounting groove is distributed opposite to one side of the U-shaped mounting groove.

[0026] Preferably, a U-shaped elastic member is fixedly connected to one end of the U-shaped mounting groove and one end of the V-shaped bending portion adjacent thereto;

[0027] It also includes a guide member fixedly arranged on the inner wall of the clamping groove member on the side opposite to the opening, and the bottom of the U-shaped elastic member is slidably connected to the inclined surface of the guide member.

[0028] Preferably, the distance between the two U-shaped elastic members is reduced as they are guided by the guide member and move toward the inner wall of the clamping groove member on the side opposite to the opening.

[0029] In the above technical solution, the present invention provides a circuit board cutting processing device, which has the following beneficial effects: the circuit board to be cut by the pin cutting mechanism is placed on the end face of the rectangular guide frame, and as the four clamping grooves are driven together, the circuit board is shoveled into the port of the clamping groove. At this time, the side plate of the circuit board will be embedded in the U-shaped rubber software. The entire clamping force on the circuit board is a horizontal extrusion force, rather than the traditional vertical negative pressure. In addition, the U-shaped rubber software provides sufficient soft buffering potential energy during the soft contact process with the side of the circuit board. Therefore, compared with the traditional negative pressure method, the present invention uses the method of applying an extrusion force to the side of the circuit board toward the center for clamping, and will not press the edge of the circuit board under vertical pressure to cause the side of the circuit board to collapse and damage, thereby ensuring the yield rate of the circuit board appearance after cutting the pins. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0031] Figure 1 A schematic diagram of the implementation structure provided by an embodiment of the present invention;

[0032] Figure 2 A schematic diagram of the assembly structure of the bridging portion, the connecting portion, and the clamping groove provided in an embodiment of the present invention;

[0033] Figure 3 A schematic structural diagram of a clamping groove member provided in an embodiment of the present invention;

[0034] Figure 4 The embodiment of the present invention provides Figure 3 Schematic diagram of the side view structure;

[0035] Figure 5 The embodiment of the present invention provides a method based on Figure 4 Schematic diagram of the movement trajectory of the rectangular slot and U-shaped elastic member when the lower circuit board is inserted into the U-shaped rubber software;

[0036] Figure 6 The embodiment of the present invention provides Figure 4 Schematic diagram of the local enlarged structure.

[0037] Description of reference numerals:

[0038] 1. Pin shearing mechanism; 2. Rectangular guide frame; 21. Waist hole; 22. Extension arm; 23. Closing plate; 4. Clamping groove; 41. Missing groove; 42. Elastic connecting part; 5. U-shaped rubber soft; 51. Rubber protrusion; 6. Connecting rod; 7. Bridging part; 8. Elastic metal groove; 81. U-shaped mounting groove; 82. Connecting part; 83. Special-shaped part; 831. Rectangular groove part; 832. Round top corner; 833. V-shaped bending part; 84. U-shaped elastic part; 9. Elastic rubber cushion strip; 10. Guide part. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0040] like Figure 1-6 As shown, a circuit board pin cutting processing device includes a pin cutting mechanism 1, which is characterized by further comprising clamping grooves 4 slidably assembled on the end surface of a rectangular guide frame 2 and distributed one-to-one along the four side edges, and the four clamping grooves 4 are driven to converge toward the center of the rectangular guide frame 2 to clamp the circuit board to cooperate with the pin cutting mechanism 1;

[0041] The adjacent side surfaces of the four clamping groove members 4 are all open, and a U-shaped rubber software 5 is fixedly installed in the opening.

[0042] Specifically, in the above example, the clamping groove 4 is located on the rectangular guide frame 2 and slides to clamp the placed circuit board. Because the opening of the clamping groove 4 is an arc-shaped surface, that is, the arc-shaped surface is a stainless steel guide surface, so when the four clamping grooves 4 are close to each other, the circuit board placed on the end face of the rectangular guide frame 2 will be scooped up, and the stainless steel guide surface reduces the damping force during the scooping process to avoid scratching the side of the circuit board.

[0043] Furthermore, the pin cutting mechanism 1 provided by the present invention belongs to the prior art, and the corresponding positioning and positioning-coordinated cutting techniques are common technical knowledge among those skilled in the art, and therefore will not be described in detail.

[0044] Secondly, the movement of the clamping groove member 4 in the above embodiment can be directly lifted and moved by a driving module such as a cylinder or a stepping screw module, or four screws can be driven to rotate simultaneously by a belt, thereby driving them closer to each other.

[0045] Furthermore, in the above embodiment, waist holes 21 are symmetrically provided on the rectangular guide rail frame 2, and the side walls of the clamping groove member 4 are fixedly provided with extension arms 22 extending from the waist holes 21, and the two extension arms 22 are fixed by screws through the sealing plate 23, and the end surface of the sealing plate 23 is fixedly installed with a number of bull's eye balls, and the bull's eye balls are in rolling connection with the surface of the rectangular guide rail frame 2.

[0046] In the above technology, the circuit board to be cut by the pin shearing mechanism 1 is placed on the end face of the rectangular guide frame 2, and as the four clamping grooves 4 are driven together, the circuit board is shoveled into the port of the clamping groove 4. At this time, the side panel of the circuit board will be embedded in the U-shaped rubber software 5. The entire clamping force on the circuit board is a horizontal extrusion force, rather than the traditional vertical negative pressure. In addition, the U-shaped rubber software 5 provides sufficient soft buffering potential energy during the soft contact process with the side of the circuit board. Therefore, compared with the traditional negative pressure method, the present invention uses the method of applying an extrusion force to the side of the circuit board toward the center for clamping, and will not press the edge of the circuit board under vertical pressure, causing the side of the circuit board to collapse and be damaged, thereby ensuring the yield rate of the circuit board appearance after cutting the pins.

[0047] As an embodiment further provided by the present invention, Figure 1 and Figure 2 As shown, this example further includes a bridging portion 7 which is vertically distributed parallel to the rectangular guide rail frame 2 and is axially rotatably connected and assembled with the four clamping groove members 4 via connecting rods 6 .

[0048] Specifically, one end of the connecting rod 6 in the embodiment is mounted on a hinge seat in the sealing plate 23 via a rotating shaft, thereby achieving rotational assembly. Similarly, the connection between the bridge portion 7 and the connecting rod 6 is also assembled in the above manner. By lifting the bridge portion 7 and moving it vertically, the four clamping grooves 4 are driven to move away from or towards each other simultaneously, thereby executing the side locking and unlocking commands of the circuit board. The movement of the bridge portion 7 can be driven by a cylinder, a hydraulic lifting mechanism, a pedal lifting mechanism, or other known techniques that can be implemented by those skilled in the art, such as a plurality of connecting rods.

[0049] As an embodiment further provided by the present invention, Figure 6 As shown, the inner walls of the U-shaped rubber software 5 on both sides are fixedly provided with a plurality of rubber protrusions 51 distributed in a linear array;

[0050] The end of the rubber protrusion 51 is inclined toward the end of the U-shaped rubber software 5 , and the end surface of the rubber protrusion 51 faces the end of the U-shaped rubber software 5 .

[0051] Specifically, in this embodiment, the U-shaped rubber member 5 is produced using an injection molding process, and the U-shaped rubber member 5 and the rubber protrusions 51 are formed using a mold. The rubber protrusions 51 in this embodiment are provided in two groups, and extend relative to the inner wall of the U-shaped rubber member 5 and toward the end of the U-shaped rubber member 5. The number of rubber protrusions 51 in each group is not less than three.

[0052] Furthermore, the rubber protrusions 51 in this embodiment are arranged at an angle, forming an obtuse angle and an acute angle with the inner wall of the U-shaped rubber member 5. The acute angle is oriented toward the end of the U-shaped rubber member 5 and is less than 25° and greater than 0°. The end of the U-shaped rubber member 5 is also sloped. Therefore, as the side panels of the circuit board are shoveled along the stainless steel guide surface to the end of the U-shaped rubber member 5, as the four clamping grooves 4 continue to move closer, the side panels of the circuit board enter the U-shaped rubber member 5. The rubber protrusions 51 are pushed against the sides of the inserted circuit board, causing some deformation. The rubber protrusions 51 exert a certain clamping force. When the four clamping grooves 4 separate and release their grip on the circuit board, the circuit board remains in the clamping groove 4, held by the rubber protrusions 51 in one of the clamping grooves 4. This prevents the circuit board from falling and causing damage after the four clamping grooves 4 separate.

[0053] As the best embodiment further provided by the present invention, Figure 6 As shown, the lengths of the multiple rubber protrusions 51 located on the same horizontal plane increase in sequence from the end of the U-shaped rubber software 5 inward.

[0054] Specifically, since the lengths of the multiple rubber protrusions 51 in each group of the embodiment increase successively, the rubber protrusions 51 contact the side surfaces of the circuit board and are pushed and deformed. The deformation increases as the length of the rubber protrusions 51 increases, that is, the clamping force formed by the extrusion of the rubber protrusions 51 increases.

[0055] As another embodiment further provided by the present invention, Figure 4 and Figure 5 As shown, it also includes an elastic metal groove member 8, the elastic metal groove member 8 includes a U-shaped mounting groove 81, and the U-shaped rubber software 5 is fixedly installed in the U-shaped mounting groove 81;

[0056] Connecting portions 82 fixedly connected to the open cross-section of the clamping groove member 4 are respectively fixedly provided at both ends of the U-shaped mounting groove 81 , and the connecting portions 82 are inclined.

[0057] Specifically, the circuit board enters the clamping groove 4 through the stainless steel guide surface. As the four clamping grooves 4 continue to move closer, they will slide along the connecting portion 82 toward the U-shaped mounting groove 81 located at the center of the clamping groove 4, that is, into the U-shaped rubber software 5. When the side of the circuit board is completely inserted into the U-shaped rubber software 5.

[0058] Furthermore, the clamping groove member 4 (tough plastic member or channel steel member) is a C-shaped structure, with notches 41 symmetrically provided on its side, and the portion between the two notches 41 is an elastic connecting portion 42 (elastic plate member), and the connecting portion 82 is fixedly connected to the elastic connecting portion 42. The elastic connecting portion 42 here is also an elastic plastic member, and its end portion is also the portion connected to the elastic connecting portion 42. As the four clamping groove members 4 continue to move closer, the U-shaped rubber software 5 will move toward the inner wall of the relatively open side of the clamping groove member 4. Then the two relatively distributed elastic connecting portions 42 will approach each other. At this time, the pressure sensor is contacted by the U-shaped mounting groove 81, thereby obtaining a pressure value. After reaching a predetermined value, the pressure sensor will control the driving mechanism that drives the bridge portion 7 to stop driving.

[0059] As another embodiment further provided by the present invention, Figure 4 and Figure 5 As shown, the end portion where the connecting portion 82 is connected to the U-shaped mounting groove 81 is a special-shaped member 83, and the special-shaped member 83 has at least two rectangular groove-shaped members 831 formed by bending;

[0060] The rectangular slot-shaped member 831 is tilted and has two adjacent surfaces facing one side of the U-shaped mounting slot 81, so as to form a circular top corner 832 that contacts the inserted circuit board;

[0061] An elastic rubber cushion strip 9 with an arc surface is fixedly provided on the outer side of the circular top corner 832.

[0062] Specifically, in the embodiment, the two relatively distributed elastic connecting portions 42 will approach each other, and similarly, the connecting portion 82 will also approach the circuit board. At this time, the elastic rubber pad 9 on the rectangular groove 831 of the special-shaped member 83, which is located at a lower vertical position, will contact the circuit board. As the four clamping grooves 4 continue to move closer, the elastic rubber pad 9 on the second rectangular groove 831 will also contact the circuit board, thereby providing a clamping force. The elastic metal groove 8 allows the entire circuit board to be suspended and fixed within the opening of the clamping groove 4, while providing a certain vertical buffering force. Because the pin shearing mechanism 1 exerts a certain amount of pressure on the pin solder joint during operation, ensuring that the lower scissors are in contact with the solder joint and that the length of the pin remaining on the solder joint is minimized after cutting is completed, the elastic metal groove 8 is provided to provide a vertical buffering force for the circuit board during the operation of the pin shearing mechanism 1. For details, please refer to the background technology publication number CN119500917A.

[0063] As the best embodiment further provided by the present invention, Figure 4 and Figure 5 As shown, the two rectangular slot-shaped members 831 are distributed obliquely and are in the opposite direction to the connecting portion 82;

[0064] The ends of the two rectangular slot members 831 adjacent to the U-shaped mounting slot 81 are respectively bent to form a V-shaped bending portion 833;

[0065] The two V-shaped bending portions 833 face opposite directions, and the apex of one of the V-shaped bending portions 833 of the adjacent U-shaped mounting groove 81 is located on one side of the U-shaped mounting groove 81 .

[0066] Specifically, when the elastic rubber pad strip 9 on a rectangular slot-shaped part 831 in a low vertical position will come into contact with the circuit board, and as the four clamping slots 4 continue to move closer, the special-shaped part 83 will continue to approach the circuit board, and will rotate with this elastic rubber pad strip 9 as the origin, causing the elastic rubber pad strip 9 on the second rectangular slot-shaped part 831 to also come into contact with the circuit board.

[0067] Furthermore, as shown in the figure, one end of the U-shaped mounting groove 81 and one end of the V-shaped bending portion 833 adjacent thereto are fixedly connected with a U-shaped elastic member 84;

[0068] It also includes a guide member 10 fixedly arranged on the inner wall of the clamping groove member 4 on the side opposite to the opening, and the bottom of the U-shaped elastic member 84 is slidably connected to the inclined surface of the guide member 10.

[0069] During the execution process, the two U-shaped elastic members 84 are guided by the guide member 10 to move toward the inner wall of the clamping groove member 4 on the side opposite to the opening, and the distance between them is reduced.

[0070] Specifically, in the above embodiment, as the four clamping grooves 4 continue to move closer, the U-shaped rubber member 5 will move toward the inner wall of the clamping groove 4 on the side opposite to the opening. At this time, the U-shaped elastic member 84 will slide down along the inclined surface of the guide member 10, that is, the two U-shaped elastic members 84 will move closer to each other, and in the process, the second rectangular groove member 831 will be driven closer to the circuit board. In this process, both ends of the special-shaped member 83 will be compressed, and the two ends will be subjected to opposite forces, thereby squeezing and deforming the V-shaped bend 833, that is, the distance between them will be reduced. When both rectangular groove members 831 of one special-shaped member 83 are in contact with the circuit board, the deformation of the two V-shaped bends 833 will exert a thrust force, that is, a force on the circuit board toward the outside of the clamping groove 4, thereby achieving a tighter and more stable clamping effect.

[0071] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A circuit board pin cutting device, comprising a pin cutting mechanism, characterized in that: It also includes a clamping groove piece that is slidably assembled on the end surface of the rectangular guide rail frame and distributed one by one along the four side edges, and the four clamping groove pieces are driven to gather toward the center of the rectangular guide rail frame to clamp the circuit board to cooperate with the pin shearing mechanism; The adjacent side surfaces of the four clamping grooves are all open, and a U-shaped rubber software is fixedly installed in the opening; It also includes an elastic metal groove member, the elastic metal groove member includes a U-shaped mounting groove, and the U-shaped rubber software is fixedly installed in the U-shaped mounting groove; Both ends of the U-shaped mounting groove are respectively fixedly provided with connecting parts that are fixedly connected to the open cross-section of the clamping groove member, and the connecting parts are inclinedly distributed; The end portion of the connecting portion connected to the U-shaped mounting groove is a special-shaped piece, and the special-shaped piece has at least two rectangular groove-shaped pieces formed by bending; The rectangular slot-shaped member is distributed obliquely, and has two adjacent surfaces distributed toward one side of the U-shaped mounting slot, so as to form a circular vertex that contacts the inserted circuit board; An elastic rubber cushion strip with an arc surface is fixedly provided on the outer side of the circular top corner; The two rectangular trough-shaped parts are distributed obliquely and in the opposite direction to the connecting part; The ends of the two rectangular slot-shaped members on one side adjacent to the U-shaped mounting groove are respectively bent to form a V-shaped bending portion; The two V-shaped bending portions face opposite directions, and the vertex of one of the V-shaped bending portions adjacent to the U-shaped mounting groove is distributed opposite to one side of the U-shaped mounting groove; One end of the U-shaped mounting groove and one end of the V-shaped bending portion adjacent thereto are fixedly connected with a U-shaped elastic member; It also includes a guide piece fixedly arranged on the inner wall of the clamping groove piece on the side opposite to the opening, and the bottom of the U-shaped elastic piece is slidably connected to the inclined surface of the guide piece.

2. A circuit board leg cutting device according to claim 1, characterized in that: It also includes a bridge portion that is vertically distributed parallel to the rectangular guide rail frame and is axially rotatably connected and assembled with the four clamping groove members through connecting rods; Wherein, the bridging portion is driven to move vertically.

3. A circuit board leg cutting device according to claim 1, characterized in that: The inner walls on opposite sides of the U-shaped rubber soft body are respectively fixedly provided with a plurality of rubber protrusions distributed in a linear array; The end of the rubber protrusion is inclined toward the end of the U-shaped rubber soft part, and the end surface of the rubber protrusion faces the end of the U-shaped rubber soft part.

4. A circuit board leg cutting device according to claim 3, characterized in that: The lengths of the plurality of rubber protrusions located on the same horizontal plane increase in sequence from the end of the U-shaped rubber soft part toward the inside.

5. A circuit board leg cutting device according to claim 1, characterized in that: The clamping slot is a C-shaped structure, with notches symmetrically provided on its side, and the portion between the two notches is an elastic connecting portion, while the connecting portion is fixedly connected to the elastic connecting portion.

6. A circuit board leg cutting device according to claim 1, characterized in that: Guided by the guide member, the two U-shaped elastic members move toward the inner wall of the clamping groove member on the side opposite to the opening, and the distance between them is reduced.

Images