Burr-removing stamping die for strip-shaped hole of circuit board

Abstract

The invention discloses a burr-removing stamping die for strip-shaped holes of a circuit board. The stamping die comprises an upper die and a lower die, the upper die comprises an upper clamping plate, an upper stripper plate and an upper blanking plate; a punching needle mounting hole is formed in the position, opposite to a to-be-punched strip-shaped hole of the target circuit board, of the upper clamping plate and used for mounting at least two strip-shaped sub-punching needles, each strip-shaped sub-punching needle comprises a short needle part and a long needle part, and one part of the tail end of an upper needle of each long needle part is arranged at the lower end of the edge of the corresponding short needle part; the other part of the tail end of the upper needle is exposed and embedded with the lower end of the edge of the short needle part of the adjacent strip-shaped sub-punching needle, and the exposed part of the tail end of the upper needle shields a vertical joint between the two adjacent strip-shaped sub-punching needles; the strip-shaped sub-punching needles jointly form a strip-shaped punching needle used for punching a strip-shaped hole to be punched. The lower die comprises a lower die plate, a lower discharging plate and a lower die base. And a blanking hole is formed in the lower template. Burrs generated in the stamping process can be reduced, and the stamping quality is improved.

Description

Technical Field

[0001] The invention relates to the field of stamping dies, in particular to a stamping die for strip-shaped holes of a deburred circuit board. Background Art

[0002] Stamping is a forming method that uses a press and a die to apply external force to plates, strips, tubes and profiles to cause them to undergo plastic deformation or separation, thereby obtaining a workpiece (stamping part) of the desired shape and size. Stamping and forging are both plastic processing (or pressure processing), collectively known as forging.

[0003] PCB (Printed Circuit Board), also known as printed circuit board in Chinese, is an important electronic component, a support for electronic components, and a carrier for the electrical connection of electronic components. Punching holes on the circuit board is a common processing method for circuit boards.

[0004] When punching the strip holes of a circuit board, if the strip holes are too long, a greater punching force is required for punching, which causes the circuit board to be subjected to greater pressure during the punching process and is prone to damage. The prior art generally adopts a method of combining long and short punching needles. The long needle first punches part of the strip holes, and the short needle further punches the remaining part. Such a structure can effectively reduce the pressure during the punching process and avoid damage to the circuit board. However, the long and short punching needles of the prior art are independently set. Even if the two are fitted together during the installation process, some seams will be generated, and the gap in the seams will leave burrs on the circuit board during the punching process, thereby reducing the stamping quality. Summary of the invention

[0005] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a strip hole stamping die for deburring circuit boards, aiming to reduce the generation of burrs during the stamping process and improve the stamping quality.

[0006] To achieve the above-mentioned object, the present invention provides a punching die for strip-shaped holes of a circuit board for deburring, the punching die comprising: an upper die and a lower die;

[0007] The upper mold comprises an upper clamping plate, an upper stripping plate and an upper punching plate; a punch needle mounting hole is opened on the upper clamping plate at a position relative to the strip hole to be punched in the target circuit board, and the punch needle mounting hole is used to install at least two strip sub-punches, and the strip sub-punches include a short needle part and a long needle part, the short needle part and the long needle part of the strip sub-punch needle are an integrated structure, and the long needle part is a conical structure with a flat top and a pointed bottom, and a part of the upper needle tail end of the long needle part is arranged at the lower end of the edge of the short needle part, and the other part of the upper needle tail end is exposed and engaged with the lower end of the edge of the short needle part of the adjacent strip sub-punch needle, and the exposed part of the upper needle tail end blocks the vertical seam between two adjacent strip sub-punch needles; each of the strip sub-punches together constitutes a strip punch needle for punching the strip hole to be punched, and the long needle part and the short needle part are used to punch the target circuit board front and back to reduce the overall pressure borne by the target circuit board during the punching process;

[0008] The lower die comprises a lower die plate, a lower unloading plate and a lower die seat; and a blanking hole is provided on the lower die plate.

[0009] Optionally, the exposed portion of the upper needle tail end of the long needle part and the intersection with the short needle part are set to be longer than the vertical seam, so that the exposed portion of the upper needle tail end can fully cover the vertical seam to reduce burrs caused by the gap in the vertical seam during the stamping process.

[0010] Optionally, the area where the short needle portion is embedded with the long needle portion of the adjacent strip-shaped sub-punch needle is set to be shorter than the exposed portion of the upper needle tail end, so that the exposed portion of the upper needle tail end can fully cover the horizontal seam between the two and reduce burrs caused by the gap in the horizontal seam during the punching process.

[0011] Optionally, a wedge-shaped dividing knife is provided in the blanking hole opposite to the vertical seam, and the wedge-shaped dividing knife is used to cut waste materials and to interfere with the long needle part during the stamping process to avoid burrs in the gap of the vertical seam.

[0012] Optionally, the size of the long needle portion of each of the strip-shaped sub-punching needles is set differently according to requirements to form steps, thereby successively reducing the overall pressure on the target circuit board during the punching process.

[0013] Optionally, the long needle portion is a conical structure, and the long needle portion of the conical structure is used to partially open the strip hole to be punched during the punching process to reduce the pressure of joint punching.

[0014] Optionally, the inner contour of the upper punching plate is a first rectangle matching the target circuit board; the outer contour of the upper stripping plate is a second rectangle matching the target circuit board, the upper stripping plate is arranged on the inner side of the upper punching plate, and the upper stripping plate is provided with a punch needle guide hole for passing the strip punch needle.

[0015] Optionally, the lower template is adapted to the outer shape of the upper stripping plate, and the inner contour of the lower stripping plate is adapted to the inner contour of the upper punching plate; the lower template is arranged inside the lower stripping plate, the lower template is fixed on the lower die base, and the lower stripping plate is arranged above the lower die base.

[0016] Optionally, the lower unloading plate is provided with a first guide hole, and the lower die base is provided with a guide column corresponding to the first guide hole; the first guide hole and the guide column are socketed so that the lower unloading plate is arranged above the lower die base, and the upper punching plate is also provided with a second guide hole corresponding to the guide column.

[0017] The beneficial effects of the present invention are as follows: 1. A part of the upper needle tail end of the long needle part of the present invention is arranged at the lower end of the edge of the short needle part belonging to the same, and the other part of the upper needle tail end is exposed and fits with the lower end of the edge of the short needle part of the adjacent strip-shaped sub-punch needle. The exposed part of the upper needle tail end blocks the vertical seam between two adjacent strip-shaped sub-punch needles. The present invention uses the mechanism design of the long needle part to block the seam, so that the strip-shaped punch needle can completely punch each corresponding area of ​​the strip hole to be punched during the punching process, effectively solving the problem of the prior art that the seam gap will leave burrs on the circuit board during the punching process, thereby improving the stamping quality. 2. The exposed part of the upper needle tail end of the long needle part of the present invention is arranged to be longer than the vertical seam at the intersection with the short needle part belonging to the same, so that the exposed part of the upper needle tail end can fully block the vertical seam, avoiding the generation of burrs in the gap of the vertical seam during the punching process. This structural design further avoids the generation of burrs. 3. The area where the short needle portion of the present invention is embedded with the long needle portion of the adjacent strip-shaped sub-punch needle is set to be shorter than the exposed portion of the upper needle tail end, so that the exposed portion of the upper needle tail end can fully cover the horizontal seam between the two, avoiding burrs in the gap of the horizontal seam during the punching process. This structural design can avoid the generation of longitudinal burrs. 4. A wedge-shaped dividing knife is provided at the position opposite to the vertical seam in the blanking hole. The wedge-shaped dividing knife is used to cut waste materials and to conflict with the long needle portion during the punching process, avoiding burrs in the gap of the vertical seam. The conflicting structure between the wedge-shaped dividing knife and the long needle portion further ensures full contact without gaps during the punching process, further reducing the generation of burrs.

[0018] In summary, the present invention can reduce the generation of burrs during the stamping process and improve the stamping quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is a schematic diagram of the exploded structure of a strip hole punching die for deburring a circuit board provided by a specific embodiment of the present invention;

[0020] Figure 2 It is a schematic structural diagram of a strip-shaped sub-punch needle provided by a specific embodiment of the present invention;

[0021] Figure 3 It is a schematic structural diagram of a strip punch provided by a specific embodiment of the present invention;

[0022] Figure 4 It is a front view structural schematic diagram of a strip punch provided by a specific embodiment of the present invention;

[0023] Figure 5 It is a schematic diagram of a top view of the structure of two strip-shaped sub-punches embedded in each other provided by a specific embodiment of the present invention;

[0024] Figure 6 It is a schematic diagram of the lower template structure provided by a specific embodiment of the present invention. DETAILED DESCRIPTION

[0025] The present invention discloses a strip hole punching die for deburring circuit boards. Those skilled in the art can refer to the content of this article and appropriately improve the technical details to achieve the desired effect. It should be particularly noted that all similar substitutions and modifications are obvious to those skilled in the art and are considered to be included in the present invention. The method and application of the present invention have been described through preferred embodiments, and relevant personnel can obviously modify or appropriately change and combine the method and application described herein without departing from the content, spirit and scope of the present invention to implement and apply the technology of the present invention.

[0026] The applicant has found through research that the integration of long and short punch needles can reduce the generation of burrs. However, if only one punch needle with integrated long and short punch needles is used for overly long strip holes, the installation process will be troublesome due to its length and may not be installed properly. Therefore, multiple long and short needles are still required for stamping, and some burrs will still be generated.

[0027] Therefore, the embodiment of the present invention provides a strip hole punching die for deburring a circuit board, such as Figure 1-6 As shown, the stamping die includes: an upper die and a lower die;

[0028] The upper die comprises an upper clamping plate 1, an upper stripping plate 2 and an upper punching plate 3; a punching needle mounting hole is provided on the upper clamping plate 1 at a position relative to the strip hole to be punched on the target circuit board, and the punching needle mounting hole is used to install at least two strip sub-punching needles 101, the strip sub-punching needles 101 comprise a short needle portion 104 and a long needle portion 103, the short needle portion 104 and the long needle portion 103 of the strip sub-punching needle 101 are an integrated structure, the long needle portion 103 is a conical structure with a flat upper portion and a pointed lower portion, and a portion of the upper needle tail end of the long needle portion 103 is arranged on the short needle portion 104 and the long needle portion 103 are arranged on the short needle portion 104 and the long needle portion 103 are an integrated structure, and the long needle portion 103 is a conical structure with a flat upper portion and a pointed lower portion, and a portion of the upper needle tail end of the long needle portion 103 is arranged on the short needle portion 104 and the long needle portion 103 are ... The lower edge of the needle portion 104 and the other part of the upper needle tail end are exposed and fit with the lower edge of the short needle portion 104 of the adjacent strip-shaped sub-punch needle 101, and the exposed part of the upper needle tail end covers the vertical seam 105 between two adjacent strip-shaped sub-punch needles 101; each strip-shaped sub-punch needle 101 together forms a strip-shaped punch needle 102 for punching the strip-shaped hole to be punched, and the long needle portion 103 and the short needle portion 104 are used to punch the target circuit board from front to back to reduce the overall pressure on the target circuit board during the punching process;

[0029] The lower die comprises a lower die plate 4 , a lower unloading plate 5 and a lower die base 6 ; the lower die plate 4 is provided with a blanking hole 401 .

[0030] It should be noted that in the prior art, burrs are generally generated when punching a circuit board because the circuit board area corresponding to the gap of the vertical seam 105 cannot be punched. The corresponding structure of the embodiment of the present invention enables the long needle portion 103 to block the vertical seam 105, thereby effectively avoiding the occurrence of this problem and improving the punching quality.

[0031] In this specific embodiment, Figure 2 , 3 As shown in FIG. 4 , the long needle portion 103 structure can effectively shield the vertical seam 105 to avoid burrs.

[0032] In this specific embodiment, the exposed portion of the upper needle tail end of the long needle portion 103 and the intersection with the short needle portion 104 are set to be longer than the vertical seam 105, so that the exposed portion of the upper needle tail end can fully cover the vertical seam 105 to reduce burrs caused by the gap of the vertical seam 105 during the stamping process.

[0033] It should be noted that such comprehensive shielding can further avoid the generation of burrs.

[0034] In this specific embodiment, the area where the short needle portion 104 is embedded with the long needle portion 103 of the adjacent strip-shaped sub-punch needle 101 is set to be shorter than the exposed portion of the upper needle tail end, so that the exposed portion of the upper needle tail end can fully cover the horizontal seam 106 between the two and reduce the gap in the horizontal seam 106 during the punching process to produce burrs.

[0035] It should be noted that the above structure can shield the horizontal seam 106 to avoid burrs.

[0036] It is worth mentioning that the strip-shaped sub-punch needle 101 can be viewed from above as follows Figure 5 As shown, the area of ​​the short needle part 104 above the long needle part 103 is shorter than the long needle part 103, so that the exposed part of the upper needle tail end of the long needle part 103 and the intersection of the short needle part 104 belonging to the same can be set longer than the vertical seam 105 and the area where the short needle part 104 and the long needle part 103 of the adjacent strip-shaped sub-punching needle 101 are embedded is set shorter than the exposed part of the upper needle tail end. Burrs are effectively avoided and the stamping quality is improved.

[0037] In this specific embodiment, a wedge-shaped dividing knife 402 is provided in the blanking hole 401 opposite to the vertical seam 105 , and the wedge-shaped dividing knife 402 is used to cut waste and to interfere with the long needle portion 103 during the stamping process to avoid burrs in the gap of the vertical seam 105 .

[0038] It should be noted that, through the above structure, the gap of the vertical seam 105 corresponding to the circuit board area can be abutted by the wedge-shaped dividing knife 402 and the long needle portion 103, further avoiding the problem that the gap of the vertical seam 105 corresponding to the circuit board area cannot be punched.

[0039] In this specific embodiment, the size of the long needle portion 103 of each strip-shaped sub-punch needle 101 is set differently according to needs to form a ladder, which gradually reduces the overall pressure on the target circuit board during the punching process.

[0040] It should be noted that if the strip hole to be punched is too long, it can be divided into multiple steps for multi-stage punching, so as to further reduce the overall pressure on the target circuit board during the punching process.

[0041] In this specific embodiment, the long needle portion 103 is a conical structure, and the long needle portion 103 of the conical structure is used to partially open the strip hole to be punched during the punching process to reduce the pressure of the joint punching. Figure 2 , Figure 3 , Figure 4 As shown, the conical structure can make the punching opening more stable.

[0042] In this specific embodiment, the inner contour of the upper punching plate 3 is a first rectangle matching the target circuit board; the outer contour of the upper stripping plate 2 is a second rectangle matching the target circuit board, and the upper stripping plate 2 is arranged on the inner side of the upper punching plate 3, and is provided with a punch guide hole 202 for passing the strip punch 102.

[0043] In this specific embodiment, the lower template 4 is adapted to the outer shape of the upper stripping plate 2, and the inner contour of the lower stripping plate 5 is adapted to the inner contour of the upper punching plate 3; the lower template 4 is arranged inside the lower stripping plate 5, the lower template 4 is fixed on the lower die base 6, and the lower stripping plate 5 is arranged above the lower die base 6.

[0044] In this specific embodiment, the lower unloading plate 5 is provided with a first guide hole 501, and the lower die base 6 is provided with a guide column 601 corresponding to the first guide hole 501; the first guide hole 501 and the guide column 601 are socketed so that the lower unloading plate 5 is arranged above the lower die base 6, and the upper punching plate 3 is also provided with a second guide hole 301 corresponding to the guide column 601.

[0045] A part of the upper needle tail end of the long needle portion 103 of the embodiment of the present invention is arranged at the lower end of the edge of the short needle portion 104, and the other part of the upper needle tail end is exposed to fit with the lower end of the edge of the short needle portion 104 of the adjacent strip-shaped sub-punching needle 101, and the exposed part of the upper needle tail end shields the vertical seam 105 between two adjacent strip-shaped sub-punching needles 101. The embodiment of the present invention shields the seam through the mechanism design of the long needle portion 103, so that the strip-shaped punching needle 102 can completely punch each corresponding area of ​​the strip hole to be punched during the punching process, effectively solving the problem of the existing technology that the seam gap will leave burrs on the circuit board during the punching process, and improving the punching quality.

[0046] In the embodiment of the present invention, the exposed portion of the upper needle tail end of the long needle portion 103 and the intersection with the short needle portion 104 are set to be longer than the vertical seam 105, so that the exposed portion of the upper needle tail end can fully cover the vertical seam 105, avoiding the generation of burrs in the gap of the vertical seam 105 during the stamping process. This structural design further avoids the generation of burrs.

[0047] The area where the short needle portion 104 of the embodiment of the present invention fits with the long needle portion 103 of the adjacent strip-shaped sub-punch needle 101 is set shorter than the exposed portion of the upper needle tail end, so that the exposed portion of the upper needle tail end can fully cover the horizontal seam 106 between the two, avoiding the generation of burrs in the gap of the horizontal seam 106 during the punching process. This structural design can avoid the generation of longitudinal burrs.

[0048] In this specific embodiment, Figure 6 As shown, a wedge-shaped dividing knife 402 is provided in the blanking hole 401 at a position opposite to the vertical joint 105. The wedge-shaped dividing knife 402 is used to cut waste materials and to abut against the long needle portion 103 during the stamping process to prevent burrs from being generated in the gap of the vertical joint 105. The abutment structure between the wedge-shaped dividing knife 402 and the long needle portion 103 further ensures full contact without gaps during the stamping process, further reducing the generation of burrs.

[0049] In summary, the embodiments of the present invention can reduce the generation of burrs during the stamping process and improve the stamping quality.

[0050] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0051] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0052] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A punching die for strip holes in a circuit board for deburring, characterized in that: The stamping die comprises: an upper die and a lower die; The upper mold comprises an upper clamping plate, an upper stripping plate and an upper punching plate; a punch needle mounting hole is opened on the upper clamping plate at a position relative to the strip hole to be punched in the target circuit board, and the punch needle mounting hole is used to install at least two strip sub-punches, and the strip sub-punches include a short needle part and a long needle part, the short needle part and the long needle part of the strip sub-punch needle are an integrated structure, and the long needle part is a conical structure with a flat top and a pointed bottom, and a part of the upper needle tail end of the long needle part is arranged at the lower end of the edge of the short needle part, and the other part of the upper needle tail end is exposed and engaged with the lower end of the edge of the short needle part of the adjacent strip sub-punch needle, and the exposed part of the upper needle tail end blocks the vertical seam between two adjacent strip sub-punch needles; each of the strip sub-punches together constitutes a strip punch needle for punching the strip hole to be punched, and the long needle part and the short needle part are used to punch the target circuit board front and back to reduce the overall pressure borne by the target circuit board during the punching process; The lower die comprises a lower die plate, a lower unloading plate and a lower die seat; and a blanking hole is provided on the lower die plate.

2. The strip hole punching die for deburring circuit board according to claim 1, characterized in that: The exposed part of the upper needle tail end of the long needle part and the intersection with the short needle part are set to be longer than the vertical seam, so that the exposed part of the upper needle tail end can fully cover the vertical seam to reduce burrs caused by the gap of the vertical seam during the stamping process.

3. The strip hole punching die for deburring circuit board according to claim 1, characterized in that: The area where the short needle portion is embedded with the long needle portion of the adjacent strip-shaped sub-punch needle is set shorter than the exposed part of the upper needle tail end, so that the exposed part of the upper needle tail end can fully cover the horizontal seam between the two and reduce burrs caused by the gap in the horizontal seam during the punching process.

4. The strip hole punching die for deburring circuit board according to claim 1, characterized in that: A wedge-shaped dividing knife is arranged in the blanking hole at a position opposite to the vertical seam, and the wedge-shaped dividing knife is used to cut waste materials and to collide with the long needle part during the punching process to avoid burrs in the gap of the vertical seam.

5. The strip hole punching die for deburring circuit board according to claim 1, characterized in that: The size of the long needle portion of each of the strip-shaped sub-punching needles is set differently according to requirements to form steps, thereby successively reducing the overall pressure on the target circuit board during the punching process.

6. The strip hole punching die for deburring circuit board according to claim 1, characterized in that: The long needle portion is a conical structure, and the long needle portion of the conical structure is used to partially open the strip-shaped hole to be punched during the punching process to reduce the pressure of the joint punching.

7. The strip hole punching die for deburring circuit board according to claim 1, characterized in that: The inner contour of the upper punching plate is a first rectangle matching the target circuit board; the outer contour of the upper stripping plate is a second rectangle matching the target circuit board, the upper stripping plate is arranged on the inner side of the upper punching plate, and a punch needle guide hole for passing the strip punch needle is provided on the upper stripping plate.

8. The strip hole punching die for deburring circuit boards according to claim 1, characterized in that: The lower template is adapted to the outer shape of the upper stripping plate, and the inner contour of the lower stripping plate is adapted to the inner contour of the upper punching plate; the lower template is arranged inside the lower stripping plate, the lower template is fixed on the lower die base, and the lower stripping plate is arranged above the lower die base.

9. The strip hole punching die for deburring circuit board according to claim 1, characterized in that: The lower unloading plate is provided with a first guide hole, and the lower die seat is provided with a guide column corresponding to the first guide hole; The first guide hole and the guide column are sleeved so that the lower unloading plate is arranged above the lower die seat, and the upper punching plate is also provided with a second guide hole corresponding to the guide column.

Images