CN111993001A - Lead frame die and forming male die machining method - Google Patents
Lead frame die and forming male die machining method Download PDFInfo
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- CN111993001A CN111993001A CN202010858043.9A CN202010858043A CN111993001A CN 111993001 A CN111993001 A CN 111993001A CN 202010858043 A CN202010858043 A CN 202010858043A CN 111993001 A CN111993001 A CN 111993001A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/24—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass dies
Abstract
The invention provides a lead frame die and a forming male die processing method, belonging to the technical field of electronic part processing, and comprising a lower die holder, an upper die holder, a lower forming block arranged on the lower die holder, and a forming male die arranged on the upper die holder, wherein an elastic jacking block is sleeved outside the lower forming block, a forming protrusion is further arranged at the top of the lower forming block, an installation through groove is further arranged on the forming male die, the installation through groove penetrates through the forming male die, an internal core block with one end flush with the end face of the forming male die and the other end concavely arranged in the forming male die is further arranged in the installation through groove, and an abdicating groove for accommodating the forming protrusion is formed by the internal core block and the side wall. According to the lead frame die and the processing method of the forming male die, provided by the invention, the processing of the forming male die can be completed only by using linear cutting processing, and then the forming male die and the inner core block are assembled, so that the processing difficulty of the top of the forming male die is reduced, and the processing precision of the forming male die is improved.
Description
Technical Field
The invention belongs to the technical field of electronic part processing, and particularly relates to a lead frame die and a forming male die processing method.
Background
The lead frame is used as a chip carrier of an integrated circuit, is a key structural member for realizing the electrical connection between a leading-out end of an internal circuit of a chip and an external lead by means of bonding materials (gold wires, aluminum wires and copper wires) to form an electrical circuit, plays a role of a bridge connected with an external lead, needs to be used in most semiconductor integrated blocks and is an important basic material in the electronic information industry. Mainly comprises TO, DIP, ZIP, SIP, SOP, SSOP, TSSOP, QFP (QFJ), SOD, SOT and the like. The production is mainly carried out by a die stamping method and a chemical etching method. The lead frame uses the following raw materials: KFC, C194, C7025, FeNi42, TAMAC-15, PMC-90, etc. The choice of material depends mainly on the desired properties of the product: (strength, electrical conductivity, and thermal conductivity). The existing lead frame die is used for forming a part of a lead frame needing to be processed through a forming male die and a lower forming block, and a forming groove used for accommodating the lower forming block needs to be arranged on the forming male die.
Disclosure of Invention
The invention aims to provide a lead frame die and a forming male die processing method, and aims to solve the problems that the forming male die of the existing lead frame die is difficult to process and needs long time and low precision.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a lead frame mould for bend the shaping to the lead frame, be in including die holder, upper die base, setting lower shaping piece and setting on the die holder are in shaping terrace die on the upper die base, the outside of shaping piece still overlaps and is equipped with the elasticity kicking block down, the top of shaping piece still is provided with the shaping arch down, it still is provided with the installation and leads to the groove to set up on the shaping terrace die, the installation leads to the inslot and runs through shaping terrace die sets up, the inslot that the installation leads to still is provided with a tip and the concave inside pellet of establishing in the shaping terrace die of shaping terrace die terminal surface parallel and level other end, inside pellet forms with the lateral wall that the groove was led to in the installation and is.
As another embodiment of this application, the top of shaping terrace die be close to down the shaping piece still be provided with a plurality ofly with the bellied shape assorted shaping recess of shaping, it is a plurality of the shaping recess all is located let the edge of recess and with let the recess communicate each other.
As another embodiment of the application, the forming protrusion comprises two first bending protruding strips which are oppositely arranged and used for bending the lead at the upper end part of the lead frame and two second bending protruding strips which are oppositely arranged and used for bending the lead at the middle part of the lead frame.
As another embodiment of this application, first sand grip of bending is including the tip portion of bending that is used for bending lead frame upper end portion lead wire and the empty division in middle part that is used for dodging lead frame upper middle part lead wire, the sand grip of bending of second is including the middle part portion of bending that is used for bending lead frame upper middle part lead wire and the empty division in tip that is used for dodging lead frame upper end portion lead wire.
As another embodiment of this application, first bending sand grip with the equal mutually perpendicular setting of second bending sand grip, two first bending sand grip and two the second bending sand grip is constituteed and is followed the rectangle that the lower shaping piece week set up is bent protrudingly.
As another embodiment of this application, still be provided with the location fixed block that is used for fixing a position the lead frame position on the die holder, be provided with on the location fixed block and be used for fixing a position the lead frame position and in the appearance assorted constant head tank of lead frame, down the shaping piece is located in the constant head tank, the slip of elasticity kicking block sets up the location fixed block with down between the shaping piece.
As another embodiment of this application, elasticity kicking block is including sliding the setting and being in piece body in the constant head tank and setting are in piece body with the elastic component between the die holder, be provided with on the piece body and be used for holding the accommodation hole of lower shaping piece.
As another embodiment of this application, be provided with the installation blind hole that is used for installing the elastic component on the die holder, a part of installation blind hole is located another part in location fixed block below and is located the constant head tank, location fixed block bottom still is provided with the spring groove of stepping down.
As another embodiment of the application, a guide mechanism for keeping the upper die holder stably moving is further arranged between the lower die holder and the upper die holder.
The lead frame die provided by the invention has the beneficial effects that: compared with the prior art, through being provided with down the shaping piece on the lower die holder to and be provided with the shaping terrace die that sets up with shaping piece relatively down on the upper die holder, and still the cover is equipped with the elasticity kicking block in the outside of shaping piece down, and the top of shaping piece still is provided with the shaping arch down, still be provided with at the top of shaping terrace die with the protruding shape phase-match of shaping. According to the lead frame die, when a lead frame is machined, the lead frame is placed on the elastic jacking block, then the lower forming block and the forming male die are extruded, the lead frame is machined and formed through the matching of the forming protrusions and the side walls of the abdicating grooves, the forming male die is in a split form, the forming male die is further provided with the installation through groove, the inner core block is installed in the installation through groove after machining is completed, machining of the forming male die can be completed only through linear cutting machining, machining difficulty of the top of the forming male die is reduced, machining of the forming male die is simpler, and machining accuracy of the forming male die is greatly improved.
The invention also provides a processing method of the forming male die, which comprises the following steps:
step 1: cutting and cutting a blank a matched with the external dimension of the forming convex die from the blank material, and cutting a blank b matched with the external dimension of the internal core block from the blank material;
step 2: finishing the two end parts of the blank a, machining the height of the blank a to the drawing size, finishing the two end parts of the blank b, and machining the height of the blank b to the drawing size;
and step 3: processing threading holes in the blank a and the blank b, performing linear cutting on the appearance and the inner hole of the blank a according to the drawing size of a forming convex die by taking one end face of the blank a as a reference, and performing linear cutting on the appearance of the blank a according to the drawing size of an inner core block by taking one end face of the blank b as a reference;
and 4, step 4: horizontally placing the blank a, carrying out linear cutting on the end face of the blank a by taking the side face of the blank a as a reference, and sequentially processing the forming grooves at the top of the forming convex die in place;
and 5: and installing the inner core block inside the forming male die, aligning the inner core block with the bottom surface of the forming male die, and installing the inner core block in place in the installation through groove of the forming male die.
The processing method of the forming male die provided by the invention has the beneficial effects that: compared with the prior art, the forming male die is smaller in size, and the forming male die is machined by numerical milling in the prior art, so that a smaller cutter is usually required to be used for machining, and the machining difficulty of the forming male die is caused.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic cross-sectional structural view of a lead frame die provided in an embodiment of the present invention;
FIG. 2 is a schematic structural view of a lower die holder used in the embodiment of the present invention;
FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2;
FIG. 4 is a schematic structural diagram of a positioning fixing block according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of an upper mold base used in an embodiment of the present invention;
FIG. 6 is a schematic structural view of a forming punch used in the embodiment of the present invention;
fig. 7 is a schematic structural diagram of a lead frame processed by the present invention.
In the figure: 1. a lower die holder; 2. an upper die holder; 3. a lower forming block; 4. forming a male die; 41. an inner core block; 42. a yielding groove; 43. forming a groove; 44. installing a through groove; 5. an elastic jacking block; 51. a block body; 52. an elastic member; 6. a first bending convex strip; 7. second bending convex strips; 8. a guide mechanism; 9. positioning a fixed block; 91. positioning a groove; 10. a lead frame; 101. a middle lead; 102. and end lead wires.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 and 2 together, the lead frame 10 mold according to the present invention will now be described. Lead frame 10 mould, including die holder 1, the upper die base 2, the lower shaping piece 3 of setting on die holder 1, and set up the shaping terrace die 4 on the upper die base 2, the outside of lower shaping piece 3 still overlaps and is equipped with elasticity kicking block 5, the top of lower shaping piece 3 still is provided with the shaping arch, it still is provided with the installation logical groove to set up on the shaping terrace die 4, the setting of installation logical groove runs through shaping terrace die 4 and sets up, the installation is led to the inslot and still is provided with a tip and the shaping terrace die 4 terminal surface parallel and level other end and sets up the inside pellet 41 in the shaping terrace die 4 of the concave, inside pellet 41 and the lateral wall of the logical groove of.
Compared with the prior art, the lead frame 10 die provided by the embodiment is characterized in that the lower forming block 3 is arranged on the lower die holder 1, the forming male die 4 which is arranged opposite to the lower forming block 3 is arranged on the upper die holder 2, the elastic ejecting block 5 is further sleeved outside the lower forming block 3, the top of the lower forming block 3 is further provided with a forming bulge, and the top of the forming male die 4 is further provided with a shape matched with the forming bulge. According to the lead frame 10 die, when the lead frame 10 is machined, the lead frame 10 is placed on the elastic ejecting block 5, then the lower forming block 3 and the forming convex die 4 are extruded, the lead frame 10 is machined and formed through the matching of the forming protrusions and the side walls of the abdicating grooves, the forming convex die 4 is in a split mode, the forming convex die 4 is further provided with the installation through groove, the inner core block 41 is installed in the installation through groove after machining is completed, machining of the forming convex die 4 can be completed only through linear cutting machining, then the forming convex die 4 and the inner core block 41 are assembled, machining difficulty of the top of the forming convex die 4 is reduced, machining of the forming convex die 4 is simpler, and machining precision of the forming convex die 4 is improved.
As a specific embodiment of the lead frame 10 mold provided by the present invention, please refer to fig. 3 to fig. 6, a plurality of molding grooves 43 matching with the shape of the molding protrusion are further disposed on the top of the molding convex mold 4 close to the lower molding block 3, and the molding grooves 43 are all located on the edge of the abdicating groove and are communicated with the abdicating groove. The side wall of the forming groove 43 and the side wall of the abdicating groove coincide with each other, a molded surface matched with the forming convex shape is formed at the mouth of the abdicating groove through the forming groove 43, and the forming groove 43 traverses the top surface of the whole forming male die 4, so that the forming groove 43 can be processed by linear cutting, the processing of the forming groove 43 is simpler and more convenient, meanwhile, the processing of the top surface of the forming male die 4 is more rapid and more convenient, and the processing precision of the top surface of the forming male die 4 is higher.
Referring to fig. 2, 3 and 7, as an embodiment of the lead frame mold provided by the present invention, the forming protrusion includes two first bending protruding strips 6 oppositely disposed for bending the upper end portion lead of the lead frame, and two second bending protruding strips 7 oppositely disposed for bending the middle portion lead of the lead frame. The first bending convex strips 6 and the second bending convex strips 7 are arranged, after the lead frame 10 is punched once, the middle leads 101 of two rows of leads on the lead frame 10 are bent, two rows of end leads 102 are bent, then the lead frame 10 is bent for the second time after being rotated by a certain angle, so that the end leads 102 and the middle leads 101 on all lead rows on the lead frame 10 are all processed in place, the processing of the CQFP lead frame 10 is realized by using one set of die to punch twice, the processing efficiency of the lead frame 10 is improved, and the processing cost of the lead frame 10 is also reduced.
Referring to fig. 2 and 3, as an embodiment of the lead frame mold provided by the present invention, the first bending convex strip 6 includes an end bending portion for bending the upper end lead 102 of the lead frame 10 and a middle portion void for avoiding the middle lead 101 on the lead frame 10, and the second bending convex strip 7 includes a middle bending portion for bending the upper middle lead 101 on the lead frame 10 and an end portion void for avoiding the upper end lead 102 on the lead frame 10. The shape of the first bending convex strip 6 is matched with that of the end lead 102, the shape of the second bending convex strip 7 is matched with that of the middle lead 101, when the lead frame 10 is bent for the first time, the two rows of leads on the lead frame 10 are bent at the first bending convex strip 6 at the end lead 102, the other two rows of leads are bent at the second bending convex strip 7 at the middle lead 101, then the lead frame 10 is rotated by 90 degrees and placed on the lower forming block 3 again for secondary punching, the two rows of leads on the lead frame 10 bend the middle lead 101 which is not bent at the second bending convex strip 7, and the other two rows of leads on the lead frame 10 bend the end lead 102 which is not bent at the first bending convex strip 6, so that the processing efficiency of the lead frame 10 is improved, and the processing cost of the lead frame 10 is reduced.
In this embodiment, still be provided with on the working face of last shaping piece 4 and be used for holding last shaping piece 4 and in last shaping piece 4 shape assorted groove 42 of stepping down, the groove 42 of stepping down is concave to be established on last shaping piece 4 bottom surface, when going up shaping piece 4 and lower shaping piece 3 and hugging closely each other and compressing tightly, first bending sand grip 6 and second bending sand grip 7 all are located the groove 42 of stepping down, and the lateral wall shape of the groove 42 of stepping down matches each other with the side shape of first bending sand grip 6 and second bending sand grip 7 respectively, extrude the shaping position of lead frame 10 through the lateral wall of the groove 42 of stepping down and the side of first bending sand grip 6 or second bending sand grip.
As an embodiment of the lead frame mold according to the present invention, referring to fig. 2 to 3, the first bending convex strips 6 and the second bending convex strips 7 are both disposed perpendicular to each other, and the two first bending convex strips 6 and the two second bending convex strips 7 form a rectangular bending protrusion disposed along the circumference of the lower forming block 3. The lengths and positions of the first bending convex strip 6 and the second bending convex strip 7 are matched with the areas needing to be bent on the CQFP lead frame 10, so that the processing efficiency of the lead frame 10 is improved, and the processing cost of the lead frame 10 is reduced.
Referring to fig. 2 and 4, as a specific embodiment of the lead frame mold provided by the present invention, the lower die base 1 is further provided with a positioning fixing block 9 for positioning the position of the lead frame 10, the positioning fixing block 9 is provided with a positioning groove 91 for positioning the position of the lead frame 10 and matching the shape of the lead frame 10, the lower forming block 3 is located in the positioning groove 91, and the elastic top block 5 is slidably disposed between the positioning fixing block 9 and the lower forming block 3. The constant head tank 91 runs through whole location fixed block 9 setting to elasticity kicking block 5 slides and sets up in constant head tank 91, and elasticity kicking block 5 can slide from top to bottom along the direction of height of constant head tank 91. The top height of the elastic top block 5 is lower than the top surface of the positioning fixing block 9 but higher than the top surface of the lower molding block 3 in the initial state, so that the lead frame 10 can be conveniently placed into the positioning groove 91 for positioning before processing.
In this embodiment, the positioning groove 91 includes a groove body for positioning the lead frame 10 and matching the shape of the lead frame 10 body, and an escape portion for escaping the connection end of the lead frame 10.
Referring to fig. 2 and 4, the elastic top block 5 includes a block body 51 slidably disposed in the positioning groove 91 and an elastic member 52 disposed between the block body 51 and the lower die base 1, and the block body 51 is provided with an accommodating hole for accommodating the lower molding block 3. The piece body 51 sets up with lower bolster 1 interval under the effect of elastic component 52, and under the pressure effect of last shaping piece 4, piece body 51 can be interactive for shaping piece 3 down, and convenient last shaping piece 4 is bent the processing to lead frame 10, makes and has improved lead frame 10 production efficiency.
In this embodiment, the elastic member 52 preferably adopts a spring, so that the overall manufacturing cost of the mold is reduced, the structure is simple, the installation is convenient and fast, and the mold is more convenient and fast to manufacture and assemble.
As a specific embodiment of the lead frame mold provided by the present invention, please refer to fig. 1 to 4, a lower die holder 1 is provided with a blind mounting hole for mounting an elastic element 52, a portion of the blind mounting hole is located below a positioning fixing block 9, another portion of the blind mounting hole is located in a positioning groove 91, and the bottom of the positioning fixing block 9 is further provided with a spring relief groove. The elastic piece 52 is placed in the installation blind hole and then is pressed and fixed on the installation blind hole through the positioning fixing block 9, one part of the end face of the elastic piece 52 abuts against the bottom of the spring yielding groove at the bottom of the positioning fixing block 9, the other part of the end face abuts against the bottom of the block body 51, and the spring yielding groove is arranged to allow the elastic piece 52 to have a certain telescopic space to jack up the block body 51 by a certain height, so that the block body 51 can support the lead frame 10. The elastic element 52 is more convenient to install, and the whole space of the lower die holder 1 is saved.
Referring to fig. 1 to 4, as a specific embodiment of the lead frame mold provided by the present invention, a guiding mechanism 8 for keeping the upper mold base 2 stably moving is further disposed between the lower mold base 1 and the upper mold base 2. The guide mechanism 8 comprises a plurality of guide posts arranged on the lower die holder 1 and a plurality of guide sleeves arranged on the upper die holder 2 and matched with the guide posts in position, and guide sleeve holes used for installing the guide sleeves are formed in the upper die holder 2. The guide mechanism 8 enables the upper die holder 2 and the lower die holder 1 to move more accurately.
The invention also provides a processing method of the forming male die 4, which comprises the following steps:
step 1: cutting and cutting a blank a matched with the external dimension of the forming convex die 4 from the blank material, and cutting a blank b matched with the external dimension of the inner core block 41 from the blank material; the sizes of the blank a and the blank b at each position are 2mm-5mm larger than the actual sizes of the forming convex die 4 and the inner core block 41, and the blank a and the blank b are cut from a whole blank by a metal cutting machine, so that the blank is cut more quickly;
step 2: finishing the two end parts of the blank a, machining the height of the blank a to the drawing size, finishing the two end parts of the blank b, and machining the height of the blank b to the drawing size; clamping and fixing the blank a and the blank b to a workbench row of a grinding machine through a vice or other clamping tools, machining two ends of the blank a and the blank b by the grinding machine, and machining the height of the blank a and the height of the blank b to the size of a drawing;
and step 3: processing threading holes on the blank a and the blank b, carrying out linear cutting on the appearance and the inner hole of the blank a according to the drawing size of the forming convex die 4 by taking one end face of the blank a as a reference, and carrying out linear cutting on the appearance of the blank a according to the drawing size of the inner core block 41 by taking one end face of the blank b as a reference; the diameter of the threading hole is preferably 4mm, and the threading hole penetrates through the blank a along the height direction of the blank a;
and 4, step 4: horizontally placing the blank a, carrying out linear cutting on the end face of the blank a by taking the side face of the blank a as a reference, and sequentially processing the forming grooves 43 at the top of the forming convex die 4 in place; the linear cutting equipment respectively uses the bottom surface of the side box of the blank a as a reference to carry out alignment and tool setting, so that the processing precision of the forming groove 43 is higher;
and 5: the inner core block 41 is mounted inside the forming punch 4, and the inner core block 41 is aligned with the bottom surface of the forming punch 4, so that the inner core block 41 is mounted in position inside the mounting through groove of the forming punch 4. And detecting the bottom surfaces of the inner core block 41 and the forming male die 4, wherein the height difference between the inner core block 41 and the forming male die 4 is less than 0.05 mm.
The processing method of the forming convex die 4 provided by the invention has the beneficial effects that: compared with the prior art, the forming convex die 4 is smaller in size, and the forming convex die 4 is processed by numerical milling in the prior art, so that a smaller cutter is generally needed for processing, and the forming convex die 4 is difficult to process.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a lead frame mould, its characterized in that is in including die holder, upper die base, setting lower shaping piece and setting on the die holder are in shaping terrace die on the upper die base, the outside of shaping piece is still overlapped and is equipped with the elasticity kicking block down, the top of shaping piece still is provided with the shaping arch down, it still is provided with the installation and leads to the groove to set up on the shaping terrace die, the installation leads to the groove and runs through shaping terrace die sets up, the installation still is provided with a tip and the concave inside pellet of establishing in the shaping terrace die of shaping terrace die terminal surface parallel and level other end in the inslot, inside pellet forms with the lateral wall that the groove was led to in the installation and is used for.
2. The lead frame die as claimed in claim 1, wherein the top of the molding male die, which is close to the lower molding block, is further provided with a plurality of molding grooves matched with the shape of the molding protrusions, and the plurality of molding grooves are all located at the edges of the abdicating grooves and are communicated with the abdicating grooves.
3. The leadframe die of claim 1, wherein the forming protrusions comprise two first bending ribs disposed opposite to each other for bending the upper end leads of the leadframe, and two second bending ribs disposed opposite to each other for bending the middle leads of the leadframe.
4. The lead frame mold according to claim 3, wherein the first bending rib includes an end portion bending portion for bending the upper end portion lead of the lead frame and a middle portion clearance for avoiding the middle portion lead of the lead frame, and the second bending rib includes a middle portion bending portion for bending the middle portion lead of the lead frame and an end portion clearance for avoiding the upper end portion lead of the lead frame.
5. The leadframe die according to claim 4, wherein the first bending ribs and the second bending ribs are perpendicular to each other, and the two first bending ribs and the two second bending ribs form rectangular bending protrusions arranged around the lower molding block.
6. The lead frame die as claimed in claim 1, wherein the lower die holder is further provided with a positioning fixing block for positioning the lead frame, the positioning fixing block is provided with a positioning groove for positioning the lead frame and matching the lead frame in shape, the lower molding block is located in the positioning groove, and the elastic top block is slidably arranged between the positioning fixing block and the lower molding block.
7. The lead frame mold according to claim 6, wherein the elastic top block comprises a block body slidably disposed in the positioning groove and an elastic member disposed between the block body and the lower die base, and the block body is provided with a receiving hole for receiving the lower molding block.
8. The lead frame die as claimed in claim 7, wherein the lower die base is provided with a blind mounting hole for mounting the elastic element, one part of the blind mounting hole is located below the positioning fixing block, the other part of the blind mounting hole is located in the positioning groove, and the bottom of the positioning fixing block is further provided with a spring abdicating groove.
9. The lead frame die of claim 1, wherein a guide mechanism for keeping the upper die base stably moving is further arranged between the lower die base and the upper die base.
10. The machining method of the forming male die is characterized by comprising the following steps of:
step 1: cutting and cutting a blank a matched with the external dimension of the forming convex die from the blank material, and cutting a blank b matched with the external dimension of the internal core block from the blank material;
step 2: finishing the two end parts of the blank a, machining the height of the blank a to the drawing size, finishing the two end parts of the blank b, and machining the height of the blank b to the drawing size;
and step 3: processing threading holes in the blank a and the blank b, performing linear cutting on the appearance and the inner hole of the blank a according to the drawing size of a forming convex die by taking one end face of the blank a as a reference, and performing linear cutting on the appearance of the blank a according to the drawing size of an inner core block by taking one end face of the blank b as a reference;
and 4, step 4: horizontally placing the blank a, carrying out linear cutting on the end face of the blank a by taking the side face of the blank a as a reference, and sequentially processing the forming grooves at the top of the forming convex die in place;
and 5: and installing the inner core block inside the forming male die, aligning the inner core block with the bottom surface of the forming male die, and installing the inner core block in place in the installation through groove of the forming male die.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010858043.9A CN111993001B (en) | 2020-08-24 | 2020-08-24 | Lead frame die and forming male die machining method |
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| CN202010858043.9A CN111993001B (en) | 2020-08-24 | 2020-08-24 | Lead frame die and forming male die machining method |
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| CN201300170Y (en) * | 2008-11-13 | 2009-09-02 | 厦门市尚明达机电工业有限公司 | Semiconductor lead wire framework die |
| CN103418683A (en) * | 2013-07-16 | 2013-12-04 | 成都兴宇精密铸造有限公司 | Stamping die for fuel tank cover plate |
| CN203390529U (en) * | 2013-08-01 | 2014-01-15 | 厦门锐腾电子科技有限公司 | Integrated circuit (IC) lead frame bending and cutting off die |
| CN203817178U (en) * | 2014-04-28 | 2014-09-10 | 四川金湾电子有限责任公司 | Cut-off forming die assembly for manufacturing semiconductor lead frame |
| CN104889254A (en) * | 2015-06-18 | 2015-09-09 | 广西柳州市昌业机械制造有限公司 | Part punching and flanging die |
| CN105396945A (en) * | 2015-11-24 | 2016-03-16 | 重庆万斯金属特种成形有限公司 | U-shaped part forming die with floating pressure plates |
| CN205660051U (en) * | 2016-05-25 | 2016-10-26 | 四川信息职业技术学院 | Make semiconductor lead frame's stamping die |
| CN206868922U (en) * | 2017-03-21 | 2018-01-12 | 义乌市易开盖实业公司 | A kind of tapered shaped can drawing die |
| CN208437477U (en) * | 2018-04-27 | 2019-01-29 | 苏州格鼎精密电子有限公司 | A kind of stamping die for camera assembly parts |
| CN209773246U (en) * | 2019-04-16 | 2019-12-13 | 广州中益机械有限公司 | Trimming and flanging die |
| CN210146791U (en) * | 2019-06-24 | 2020-03-17 | 天水迈格智能设备有限公司 | Stamping die of lead frame |
| CN111229955A (en) * | 2019-12-28 | 2020-06-05 | 河北成华机械制造有限公司 | Special riveting device for inner plate of lever block wrench and brake cover |
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