CN112060200A - Flexible circuit board structure and punching device thereof - Google Patents
Flexible circuit board structure and punching device thereof Download PDFInfo
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- CN112060200A CN112060200A CN202010876360.3A CN202010876360A CN112060200A CN 112060200 A CN112060200 A CN 112060200A CN 202010876360 A CN202010876360 A CN 202010876360A CN 112060200 A CN112060200 A CN 112060200A
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- circuit board
- groove
- punching
- edge
- burr
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/38—Cutting-out; Stamping-out
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/0006—Means for guiding the cutter
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/01—Means for holding or positioning work
- B26D7/015—Means for holding or positioning work for sheet material or piles of sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/01—Means for holding or positioning work
- B26D7/018—Holding the work by suction
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/20—Cutting beds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/22—Safety devices specially adapted for cutting machines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/38—Cutting-out; Stamping-out
- B26F1/44—Cutters therefor; Dies therefor
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/0011—Working of insulating substrates or insulating layers
- H05K3/0044—Mechanical working of the substrate, e.g. drilling or punching
- H05K3/0052—Depaneling, i.e. dividing a panel into circuit boards; Working of the edges of circuit boards
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F2210/00—Perforating, punching, cutting-out, stamping-out, severing by means other than cutting of specific products
- B26F2210/08—Perforating, punching, cutting-out, stamping-out, severing by means other than cutting of specific products of ceramic green sheets, printed circuit boards and the like
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Structure Of Printed Boards (AREA)
Abstract
The invention discloses a flexible circuit board structure, which comprises a circuit board and a circuit board body formed on the circuit board by punching, wherein an auxiliary cutting and deburring channel is arranged at the edge position of the circuit board body, the invention can lead punching burrs to two sides by arranging a burr hiding groove on the circuit board so that a punching protection area exists on the circuit board, and can lead the punching burrs to two sides by a symmetrical groove group, and a body auxiliary block arranged on a punching device can realize the shaping and multiple punching operation of the circuit board, when in implementation, the circuit board is fixed by a positioning groove, then the body auxiliary block can be pressed at the edge of the circuit board body in the die assembly process, the tearing phenomenon in the punching process is prevented, when the circuit board body is punched, the burr hiding groove can hide burrs generated by punching, and the burrs at the edge of the circuit board body are prevented from rubbing against a die so as to drive the bending phenomenon to occur, simultaneously, the body auxiliary block can be further punched, so that burr waste materials on the edge of the circuit board body are easier to fall off.
Description
Technical Field
The invention relates to the technical field of flexible circuit boards, in particular to a flexible circuit board structure and a punching device thereof.
Background
The flexible printed circuit board is a flexible printed circuit board which is made of polyimide or polyester film as a base material and has high reliability and excellent performance. The high-density light-weight LED lamp has the characteristics of high wiring density, light weight, thin thickness and good bending property.
The circuit board that becomes different volumes is die-cut to flexible circuit board production in-process with circuit board semi-manufactured goods is very important one step, but when die-cutting to circuit board semi-manufactured goods, the product edge of part size littleer very easily produces the burr for product quality reduces and still can lead to the emergence of card mould phenomenon simultaneously, and to this problem among the prior art, set up die-cut edge into the slope form, so that the product can not block the mould easily.
However, the following problems are faced in the operation: when a small circuit board is punched, because the size of the small circuit board is smaller, burrs or cracks are easily generated at the punching edge position of the small circuit board, and then when a punching die is opened, the burrs or cracks can scratch the die, so that the edge of the product is directly driven to bend and even tear, and the quality of the product is influenced.
Disclosure of Invention
The invention aims to provide a flexible circuit board structure and a punching device thereof, and aims to solve the technical problem that burrs or cracks at the edge position of a circuit board in the prior art are scratched by a die, so that the edge of the product is directly driven to be bent and even further torn.
In order to solve the technical problems, the invention specifically provides the following technical scheme:
a flexible circuit board structure comprises a circuit board and a circuit board body formed on the circuit board in a punching mode, wherein an auxiliary cutting channel is arranged at the edge of the circuit board body;
the auxiliary cutting burr channel comprises a burr hiding groove arranged along the edge of the circuit board body, a plurality of straight-edge through holes are formed in the inner wall of the burr hiding groove, a symmetrical groove group used for drawing punching force to disperse to two sides is arranged between every two adjacent straight-edge through holes in the inner wall of the burr hiding groove, and a profile trimming groove with a V-shaped longitudinal section and used for removing burrs on the edge of the circuit board body is arranged in the inner side area of the symmetrical groove group in the inner wall of the burr hiding groove;
the circuit board is punched along the burr hiding groove to form a circuit board body, punching force is dispersed to two sides through the symmetrical groove group traction, edge burrs of the circuit board body are hidden, and edge burrs and edges of the circuit board body are removed along the contour trimming groove.
As a preferable scheme of the present invention, the straight-side through hole has a regular quadrilateral structure, the four corner positions of the straight-side through hole are respectively provided with a crack guide groove, and the depth of the crack guide groove is set in a linearly decreasing trend from one end close to the straight-side through hole to one end far away from the straight-side through hole.
As a preferable scheme of the present invention, the depth of the burr hiding groove is set in a linearly increasing trend from a side close to the contour edge groove to a side far from the contour edge groove, pressing protection grooves are respectively formed on two ends of a U-shaped opening of the burr hiding groove on the surface of the circuit board body, and a longitudinal section of each pressing protection groove is in a C-shaped structure.
As a preferable scheme of the invention, the symmetrical groove group is located between the adjacent crack guide grooves, and the symmetrical groove group includes a cutting groove which is arranged on the inner wall of the burr hiding groove and has a V-shaped longitudinal section, an auxiliary cutting groove is formed on the surface of one side of the circuit board body away from the burr hiding groove and corresponds to the cutting groove, the longitudinal section of the auxiliary cutting groove is in an inverted U-shaped structure, and a burr guide groove which has an inverted V-shaped longitudinal section and is used for drawing a punching force to be laterally dispersed is formed on the inner wall of the U-shaped top end of the auxiliary cutting groove.
In order to solve the above technical problems, the present invention further provides the following technical solutions:
a punching device of a flexible circuit board structure comprises a lower die base and an upper die base positioned right above the lower die base, wherein a fixed edge punching mechanism is arranged between the lower die base and the upper die base;
the fixed edge burr pressing mechanism comprises a bearing table connected with the lower die base and a punching table connected with the upper die base, wherein a fixed edge groove for fixing the position along the burr hiding groove is formed in the surface of the bearing table, a blanking annular hole for blanking a punched edge material is formed in the fixed edge groove, a body auxiliary block for pressing into the fixed edge groove is mounted on the punching table, and a body trimming knife connected with the punching table is arranged on the outer side of the body auxiliary block;
the upper die base and the lower die base are matched in die, so that the body auxiliary fixing block presses the circuit board body in the fixed edge groove, and the punching profile of the circuit board body is punched and polished through the body trimming knife.
As a preferable scheme of the invention, the longitudinal section of the fixed edge groove is in a U-shaped structure, the inner wall of the fixed edge groove is provided with a plurality of suction holes for sucking the circuit board body, the bearing table is provided with an installation groove, a blowing and sucking bag is installed in the installation groove, and the blowing and sucking bag is communicated with the suction holes.
As a preferable scheme of the invention, the body auxiliary block comprises a blank holder block positioned right above the blank holder groove, a fixed edge strip for pressing into the blank holder groove is installed on the surface of one side, close to the bearing platform, of the blank holder block, a prepressing column penetrating through the punching platform is installed on the surface of the other side of the blank holder block, a sliding embedding hole for accommodating the prepressing column to move is formed in the punching platform, and a pressure spring with an end face connected with the upper die base is installed at one end, far away from the blank holder block, of the prepressing column.
According to a preferable scheme of the invention, an embedded groove for accommodating the blank holder block is formed in the surface of the punching table, an edge material cutting knife is installed on the inner wall of the fixed edge strip, and a top column connected with the prepressing column is sleeved in the pressure spring.
As a preferable scheme of the invention, the body trimming knife comprises a trimming knife body connected with the punching table, an inclined groove is formed in one end, away from the punching table, of the trimming knife body, and a polishing ring table is mounted on the side wall of the trimming knife body.
As a preferable scheme of the present invention, the longitudinal section of the scrap cutting knife is a right trapezoid structure.
Compared with the prior art, the invention has the following beneficial effects:
the invention can lead the circuit board to have a punching protection area by arranging the burr hiding groove on the circuit board, so that the circuit board body can not be easily damaged, then the punching burr can be led to two sides by the symmetrical groove group, meanwhile, the body auxiliary block arranged on the punching device can also realize the circuit board shaping and multiple punching operations.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
FIG. 1 is a schematic top view of a circuit board according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a circuit board body structure according to an embodiment of the invention;
FIG. 3 is a schematic diagram of a straight-edge via structure according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a fixed-edge needling mechanism according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a deckle strip according to an embodiment of the invention.
The reference numerals in the drawings denote the following, respectively:
1-a circuit board; 2-a circuit board body; 3-auxiliary cutting of the thoroughfare; 4-a lower die holder; 5-an upper die holder; 6-fixing edge and pressing thorn mechanism; 7-side fixing grooves; 8-body auxiliary block; 9-trimming the edge of the body;
201-flattening a protective groove;
301-burr hiding groove; 302-straight-edge perforation; 303-symmetrical groove sets; 304-profile trimming groove;
3021-crack guide groove; 3031-cutting off the groove; 3032-auxiliary grooving; 3033-burr guiding groove;
601-a carrier table; 602-die cutting station; 603-blanking annular holes; 604-embedded groove;
6011-mounting groove; 6012-a blowing and sucking bag; 701-holding holes;
801-blank holder block; 802-edge strip fixing; 803-prepressing column; 804-slip fit holes; 805-compression springs; 806-offcut removal; 807-a top post;
901-trimming a cutter body; 902-inclined grooves; 903-grinding the ring table.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the present invention provides a flexible circuit board structure, which includes a circuit board 1 and a circuit board body 2 formed on the circuit board 1 by punching, wherein an auxiliary cutting channel 3 is arranged at an edge of the circuit board body 2;
the auxiliary cutting-off burr channel 3 comprises a burr hiding groove 301 arranged along the edge of the circuit board body 2, a plurality of straight-edge through holes 302 are arranged on the inner wall of the burr hiding groove 301, a symmetrical groove group 303 used for drawing the punching force to be dispersed to two sides is arranged between the adjacent straight-edge through holes 302 on the inner wall of the burr hiding groove 301, and a profile trimming groove 304 with a V-shaped longitudinal section and used for removing the edge burrs of the circuit board body 2 is arranged on the inner side area of the symmetrical groove group 303 on the inner wall of the burr hiding groove 301, so that the edge burrs of the circuit board body 2 are more easily separated from the circuit board body 2;
the circuit board body 2 is formed on the circuit board 1 along the burr hiding groove 301 in a punching mode, punching force is drawn through the symmetrical groove group 303 to disperse to two sides, burrs on the edge of the circuit board body 2 are hidden, and burrs and edges of the edge of the circuit board body 2 are removed along the outline trimming groove 304.
In the prior art, in order to solve the problem that a circuit board body has cracks or burrs to drive clamping during punching, a clearance hole is pre-punched at the position corresponding to the edge of a reinforcing film and the edge step of the flexible circuit board body before the outer edge profile of the flexible circuit board is punched, so that stress can be reduced and the tearing phenomenon can be effectively avoided during punching of the shape of the flexible circuit board, and the patent application number is 201922131116.X Occurrence of bending, etc.), resulting in a reduction in the quality of the product.
When the circuit board structure is manufactured, a burr hiding groove 301 (stamping operation can be selected) needs to be arranged along the profile of the stamping edge of a circuit board body 2 firstly, so that the edge of the circuit board body 2 has a stamping protection area, when the subsequent stamping is carried out, the circuit board body 2 cannot be torn (namely, the burr hiding groove 301 area is directly stamped during the stamping), and when the actual stamping is carried out, a stamping die can stamp the circuit board body 2 along a symmetrical groove group 303 (at the moment, the existence of the symmetrical groove group 303 can reduce the stamping force required between the circuit board body 2 and the circuit board 1, the stress on the circuit board at the left and the right is smaller, the stamping efficiency of the circuit board can be accelerated, meanwhile, the existence of the symmetrical groove group 303 can also pull part of the stamping force to be dispersed to two sides, so that burrs generated in the stamping process are deviated and hidden to two sides, and the situation that the clamping of the burr scraping die occurs or the burr scraping die, after the punching is finished, the edge burr rim charge of the circuit board body 2 can be removed along the contour trimming groove 304 (and the existence of the contour trimming groove 304 can also play a role in protection, the phenomenon of large-range cracking can be caused when the circuit board body 2 is prevented from being torn, the contour trimming groove 304 is arranged, once a crack extends to the contour trimming groove 304 along the burr hiding groove 301, the crack can rapidly move along the contour trimming groove 304, the crack can not be spread to the circuit board body 2, and the product quality is influenced.
The flexible circuit board is provided with multi-stage protection, and the protection performance is high.
As shown in fig. 1 and 3, the straight-side through hole 302 has a regular quadrilateral structure, the four corner positions of the straight-side through hole 302 are respectively provided with a crack guide groove 3021, and the depth of the crack guide groove 3021 is set to be linearly decreased from the end close to the straight-side through hole 302 to the end far from the straight-side through hole 302, so that the area close to the straight-side through hole 302 is more easily broken.
Further, in order to solve the problem that the upper edge of the circuit board body 2 is torn due to a large punching force applied to the circuit board body 2 during punching, when the punching is performed, the stress applied to the circuit board body 2 during punching can be sufficiently reduced due to the arrangement of the plurality of straight-edge perforations 302, and then, during punching, the crack guide groove 3021 can be arranged to enable the punching fracture direction to spread along the crack guide groove 3021, that is, the crack is guided to spread along the crack guide groove 3021 without spreading in a fixed direction, so that the probability that the circuit board body 2 is damaged is reduced.
As shown in fig. 1 and 2, the depth of the burr hiding groove 301 is linearly increased from the side close to the contour trimming groove 304 to the side far from the contour trimming groove 304, the pressing protection groove 201 is provided on the surface of the circuit board body 2 at both ends of the U-shaped opening of the burr hiding groove 301, and the longitudinal section of the pressing protection groove 201 is in a C-shaped structure.
Furthermore, in order to prevent the die-cut direction from directly spreading toward the circuit board body 2, once the burr hiding groove 301 receives the die-cut force, the depth of the burr hiding groove 301 changes in the area of the contour trimming groove 304, taking fig. 2 as an example, the thickness of the burr hiding groove 301 gradually increases toward the contour trimming groove 304, that is, the crack spreading length is not too long, the burr hiding groove can be matched with the contour trimming groove 304 for tearing protection, and the existence of the flattening protection groove 201 can facilitate the subsequent operation of separating the burr rim charge of the edge of the circuit board body 2 along the contour trimming groove 304.
As shown in fig. 2, the symmetrical groove group 303 is located between adjacent crack guide grooves 3021, and the symmetrical groove group 303 includes a cutting groove 3031 which is disposed on an inner wall of the burr hiding groove 301 and has a vertical section in a "V" shape, an auxiliary cutting groove 3032 is disposed at a position on a side surface of the circuit board body 2 away from the burr hiding groove 301 corresponding to the cutting groove 3031, the vertical section of the auxiliary cutting groove 3032 is in an inverted "U" shape, and a burr guide groove 3033 which has a vertical section in an inverted "V" shape and is used for drawing a lateral dispersion of a punching force is disposed on an inner wall of a top end of the "U" shape of the auxiliary cutting groove 3032.
Further, in order to solve the problem that the edge of the circuit board body 2 generates burrs during punching and is scratched with a die, when the die punches along the burr hiding groove 301, a knife edge directly moves towards the cutting groove 3031, the cutting groove 3031 and the auxiliary cutting groove 3032 can greatly reduce the punching force required between the circuit board 1 and the circuit board body 2, so that the punching knife edge is very convenient to cut and cannot generate burrs easily, meanwhile, the die for punching can also press the edge of the circuit board body 2, so that the burr guide groove 3033 is compressed, even if burrs are generated at the edge position of the circuit board body 2, the burrs can be hidden due to the compression of the area of the burr guide groove 3033, and the burr scratching probability can be further reduced.
As shown in fig. 4, a punching device for a flexible circuit board structure comprises a lower die base 4 and an upper die base 5 located right above the lower die base 4, wherein a fixed edge punching mechanism 6 is arranged between the lower die base 4 and the upper die base 5;
the fixed edge burr pressing mechanism 6 comprises a bearing table 601 connected with the lower die holder 4 and a punching table 602 connected with the upper die holder 5, a fixed edge groove 7 used for fixing the position along the burr hiding groove 301 is formed in the surface of the bearing table 601, a blanking annular hole 603 used for dropping a punching edge material is formed in the fixed edge groove 7, a body auxiliary block 8 used for pressing towards the fixed edge groove 7 is installed on the punching table 602, and a body trimming knife 9 connected with the punching table 602 is arranged on the outer side of the body auxiliary block 8;
the upper die base 5 and the lower die base 4 are matched with each other, so that the body auxiliary block 8 presses the circuit board body 2 in the fixed edge groove 7, and punching and polishing are carried out on the punching outline of the circuit board body 2 through the body trimming knife 9.
The punching device can perform high-efficiency safety specific punching when punching the circuit board 1, directly enables the upper die base 5 and the lower die base 4 to be matched with each other when the punching device is specifically implemented, in the process of die assembly, the body auxiliary fixed block 8 can be pressed into the fixed edge groove 7 by one step by a punching cutter and directly pressed on the inner wall of the burr hiding groove 301, so that the stability of the inner wall area of the burr-concealing groove 301 is higher (i.e. the generation probability of cracks is further reduced), then the body-trimming cutter 9 is pressed into the burr-concealing groove 301 until the burr-concealing groove is penetrated into the blanking ring hole 603, and at this time, the rim charge at the edge position of the circuit board body 2 (taking fig. 2 as an example, the rim charge at the side far from the contour-trimming groove 304 in the burr-concealing groove 301 is cut off) is directly punched down and enters the blanking ring hole 603, meanwhile, the body trimming knife 9 can also polish the outline of the punching edge of the circuit board body 2, so that the probability of rubbing the burrs against the die is further reduced.
As shown in fig. 4, the longitudinal section of the fixed-side groove 7 is in a U-shaped structure, the inner wall of the fixed-side groove 7 is provided with a plurality of suction holes 701 for sucking the circuit board body 2, the bearing table 601 is provided with an installation groove 6011, a blowing and suction bag 6012 is installed in the installation groove 6011, and the blowing and suction bag 6012 is communicated with the suction holes 701.
Further, in order to solve the problem that the circuit board body 2 jumps or shakes when being punched, so that the punched edge is bent, once the position of the circuit board 1 is fixed, the suction bag 6012 is sucked to enable the suction hole 701 to generate suction to firmly fix the circuit board body 2 on the inner wall of the fixed edge groove 7, and then the circuit board body 2 can be exhausted through the suction bag 6012 once the circuit board body 2 needs to be taken out, so that the whole operation is convenient and fast.
As shown in fig. 4 and 5, the body auxiliary block 8 includes a blank holder block 801 located right above the blank holder groove 7, a blank holder 802 for pressing into the blank holder groove 7 is installed on a surface of one side of the blank holder block 801 close to the bearing platform 601, a pre-pressing column 803 penetrating through the punching platform 602 is installed on a surface of the other side of the blank holder block 801, a sliding embedding hole 804 for accommodating the pre-pressing column 803 to move is formed in the punching platform 602, a pressure spring 805 whose end surface is connected with the upper die base 5 is installed at one end of the pre-pressing column 803 far from the blank holder block 801, a rim charge cutter 806 is installed on an inner wall of the blank holder 802, a longitudinal section of the rim charge cutter 806 is of a right trapezoid structure (so that the shape of the contour trimming groove 304 can be sufficiently matched), and a top column 807 connected with the pre-pressing column 803 is sleeved in the pressure spring 805.
Further, in order to fully solve the problem that the inner wall of the burr hiding groove 301 has a large crack when the circuit board body 2 is punched, when the die is closed, the fixed edge strip 802 enters the burr hiding groove 301 (taking fig. 2 as an example) and presses the inner wall of one side close to the profile trimming groove 304, at this time, the fixed edge strip 802 can stabilize the circuit board body 2, meanwhile, the edge material cutting knife 806 also inserts into the profile trimming groove 304 and pushes the pre-pressing column 803 to slide along the sliding embedding hole 804 and extrude the pressure spring 805, then the gradually lowered punching table 602 can push the body trimming knife 9 to cut off the edge material until the die is closed, at this time, the pressure spring 805 is fully compressed, and meanwhile, the upper die holder 5 can press the top column 807, so that the depth of the edge material cutting knife 806 deepens the profile trimming groove 304 to facilitate subsequent removing operation.
In this embodiment, the punching operation is changed to two steps, so that the quality of the circuit board body 2 obtained finally can be improved, and the situations such as burrs or cracks can be avoided.
As shown in fig. 4, the surface of the die-cutting table 602 is provided with an insertion groove 604 for receiving the holder block 801, and the insertion groove 604 is provided to hide the body auxiliary block 8 so that the die can be sufficiently clamped finally.
As shown in fig. 4, the body trimming knife 9 includes a trimming knife body 901 connected to the punching table 602, an inclined groove 902 is formed in one end of the trimming knife body 901 away from the punching table 602, and a grinding ring table 903 is mounted on a side wall of the trimming knife body 901.
Further, in order to solve the problem of the edge burr of the circuit board body 2, when the integral cutting knife body 901 is punched, the inclined groove 902 can push the circuit board 1 away, so that the circuit board body 2 and the circuit board 1 cannot be connected again, and after the integral cutting knife body 901 enters the blanking annular hole 603, the edge can be polished through the polishing annular table 903 to further remove the burr.
The above embodiments are only exemplary embodiments of the present application, and are not intended to limit the present application, and the protection scope of the present application is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present application and such modifications and equivalents should also be considered to be within the scope of the present application.
Claims (10)
1. A flexible circuit board structure characterized by: the circuit board comprises a circuit board (1) and a circuit board body (2) formed on the circuit board (1) in a punching mode, wherein an auxiliary cutting spine (3) is arranged at the edge of the circuit board body (2);
the auxiliary cutting and removing burr channel (3) comprises a burr hiding groove (301) arranged along the edge of the circuit board body (2), a plurality of straight-edge through holes (302) are formed in the inner wall of the burr hiding groove (301), a symmetrical groove group (303) used for drawing punching force to be dispersed to two sides is arranged between every two adjacent straight-edge through holes (302) in the inner wall of the burr hiding groove (301), and a contour whole edge groove (304) which is provided with a V-shaped longitudinal section structure and used for removing burrs on the edge of the circuit board body (2) is arranged in the inner side area of the symmetrical groove group (303) in the inner wall of the burr hiding groove (301);
the circuit board is characterized in that a circuit board body (2) is formed on the circuit board (1) in a punching mode along a burr hiding groove (301), punching force is dispersed to two sides through a symmetrical groove group (303), burrs on the edge of the circuit board body (2) are hidden, and burrs and edges on the edge of the circuit board body (2) are removed along a contour trimming groove (304).
2. A flexible circuit board structure according to claim 1, wherein: the straight-side through hole (302) is of a regular quadrilateral structure, crack guide grooves (3021) are formed in four corner positions of the straight-side through hole (302), and the depth of each crack guide groove (3021) is set in a linearly decreasing trend from one end close to the straight-side through hole (302) to one end far away from the straight-side through hole (302).
3. A flexible circuit board structure according to claim 2, characterized in that: the degree of depth in groove (301) is hidden to the burr is linear trend setting that increases progressively from one side that is close to contour edge trimming groove (304) to one side of keeping away from contour edge trimming groove (304), the surface of circuit board body (2) the burr is hidden "U" font opening both ends of groove (301) and has all been seted up protection groove (201) that flattens, the longitudinal section that flattens protection groove (201) is "C" font structure.
4. A flexible circuit board structure according to claim 3, wherein: the symmetrical groove group (303) is located between the adjacent crack guide grooves (3021), the symmetrical groove group (303) comprises a cutting groove (3031) which is arranged on the inner wall of the burr hiding groove (301) and has a V-shaped longitudinal section, an auxiliary cutting groove (3032) is formed in the position, corresponding to the cutting groove (3031), of one side surface, far away from the burr hiding groove (301), of the circuit board body (2), the longitudinal section of the auxiliary cutting groove (3032) is of an inverted U-shaped structure, and a burr guide groove (3033) which is used for drawing lateral dispersion of punching force and has an inverted V-shaped longitudinal section is formed in the inner wall of the U-shaped top end of the auxiliary cutting groove (3032).
5. A die cutting device for use in a flexible circuit board structure according to claims 1-4, characterized in that: the device comprises a lower die base (4) and an upper die base (5) positioned right above the lower die base (4), wherein a fixed-edge burr pressing mechanism (6) is arranged between the lower die base (4) and the upper die base (5);
the fixed edge burr pressing mechanism (6) comprises a bearing table (601) connected with the lower die holder (4) and a punching table (602) connected with the upper die holder (5), a fixed edge groove (7) used for fixing the position along the burr hiding groove (301) is formed in the surface of the bearing table (601), a blanking annular hole (603) used for dropping a punching edge material is formed in the fixed edge groove (7), a body auxiliary block (8) used for pressing towards the fixed edge groove (7) is installed on the punching table (602), and a body trimming knife (9) connected with the punching table (602) is arranged on the outer side of the body auxiliary block (8);
the upper die base (5) and the lower die base (4) are matched in die, so that the body auxiliary block (8) presses the circuit board body (2) in the fixed edge groove (7), and the punching profile of the circuit board body (2) is punched and polished through the body trimming knife (9).
6. A die-cutting apparatus for flexible circuit board structures according to claim 5, wherein: the longitudinal section of the fixed edge groove (7) is of a U-shaped structure, a plurality of suction holes (701) used for sucking the circuit board body (2) are formed in the inner wall of the fixed edge groove (7), a mounting groove (6011) is formed in the bearing table (601), a blowing and sucking bag (6012) is mounted in the mounting groove (6011), and the blowing and sucking bag (6012) is communicated with the suction holes (701).
7. The punching device of a flexible circuit board structure according to claim 5, wherein the body auxiliary block (8) comprises a binder ring block (801) located right above the binder groove (7), a binder strip (802) for pressing into the binder groove (7) is installed on one side surface of the binder ring block (801) close to the bearing table (601), a pre-pressing column (803) penetrating through the punching table (602) is installed on the other side surface of the binder ring block (801), a sliding embedding hole (804) for accommodating the movement of the pre-pressing column (803) is formed in the punching table (602), and a pressure spring (805) with an end face connected with the upper die holder (5) is installed at one end of the pre-pressing column (803) far away from the binder ring block (801).
8. The punching device of a flexible circuit board structure as claimed in claim 7, wherein the surface of the punching platform (602) is provided with an embedded groove (604) for accommodating a blank holder block (801), the inner wall of the edge fixing strip (802) is provided with an edge material cutting knife (806), and the pressure spring (805) is internally sleeved with a top column (807) connected with the pre-pressing column (803).
9. The punching device of a flexible circuit board structure as claimed in claim 5, wherein the body trimming knife (9) comprises a trimming knife body (901) connected with the punching table (602), an inclined groove (902) is formed in one end of the trimming knife body (901) far away from the punching table (602), and a grinding ring table (903) is mounted on the side wall of the trimming knife body (901).
10. The apparatus of claim 8, wherein the offcut blades (806) are of right-angled trapezoidal configuration in longitudinal cross-section.
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| CN202010876360.3A CN112060200B (en) | 2020-08-27 | 2020-08-27 | Flexible circuit board structure and punching device thereof |
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| CN202010876360.3A CN112060200B (en) | 2020-08-27 | 2020-08-27 | Flexible circuit board structure and punching device thereof |
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| CN112060200B (en) | 2022-01-28 |
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