CN107971387B - Thickness material applied to punch forming lead frame is without clast die cut structural - Google Patents
Thickness material applied to punch forming lead frame is without clast die cut structural Download PDFInfo
- Publication number
- CN107971387B CN107971387B CN201711190692.0A CN201711190692A CN107971387B CN 107971387 B CN107971387 B CN 107971387B CN 201711190692 A CN201711190692 A CN 201711190692A CN 107971387 B CN107971387 B CN 107971387B
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- Prior art keywords
- punching
- clast
- lead frame
- gutter
- die cut
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
- B21D28/14—Dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lead Frames For Integrated Circuits (AREA)
Abstract
This application discloses being applied to the thickness material of punch forming lead frame without clast die cut structural, including being set to being located on the downside of no clast punching punching pin in lower die group in upper mold group without clast punching punching pin and being opened in and being punched the chip-removal hole that punching pin is adapted and is punched the be punched scrap of punching pin no clast is discharged with the no clast.No clast punching punching pin is equipped with the punching flange protruded towards its inside, when the punching punching pin punching of no clast is located at the type chamber of gutter front and rear sides, the scrap that punching flange punching gutter upper portion side wall is squeezed out to the gutter lower sides, then excision scrap completely can be realized, achieve the purpose that no clast punching thickness material, make to reach through the lead frame of the application punching molding qualified standard, to which the qualification rate of product can not only be greatly improved, and production efficiency can be also increased substantially to accelerate the manufacturing schedule of manufacturing enterprise, and then it is satisfied with the demand of growing tension, it is also beneficial to that information technology is pushed further to develop simultaneously.
Description
[technical field]
This application involves the technical fields that no clast is punched, in particular to a kind of to be applied to punch forming lead frame
Thickness material without clast die cut structural.
[background technique]
With the development of information technology, the lead frame demand arrived applied in integrated circuit is more and more, and shape is also more
Imperceptibility and high precision int.The production method of lead frame has 2 kinds: corrosion processing and punch process.Although corrosion processing can reach
Very fine precision, but it is unable to reach higher production efficiency and lower production cost, with IC chip price
It lowers rapidly, is the important channel for reducing IC chip price, improving production efficiency using stamping lead frame.
However, existing most lead frame is rushed in advance, is thinned and fine cut technique is to form the gutter for draining because having,
Such as shown in FIG. 1 to FIG. 4, the gutter upper width size is greater than its underpart width dimensions, thus the gutter top
It is thick that side wall material thickness is greater than its underpart side wall material, and then during stamping die punch forming lead frame, the row often occurs
Ditch upper portion side wall squeezes out scrap to the gutter lower sides, still, existing to be located at before and after the gutter to be punched
It is useless can not to cut off that the gutter upper portion side wall squeezes out to the gutter lower sides completely for the punching punching pin of two sides type chamber
Bits, there is also scrap for the lead frame after then be easy to causeing punching molding, so as to cause quality abnormal so that product does not conform to
Lattice to not only greatly reduce the qualification rate of product, and are also greatly reduced production efficiency and affect manufacturing enterprise
Manufacturing schedule, and then can not meet the demand of growing tension, while being also to restrict the further development of information technology.
[summary of the invention]
The application to be solved to be the above-mentioned technical problem being directed to, and provides a kind of thickness applied to punch forming lead frame
Material is without clast die cut structural.
In order to solve the above technical problems, the application is achieved through the following technical solutions:
Thickness material applied to punch forming lead frame without clast die cut structural, offered on the lead frame rushed in advance,
It thins and fine cut technique is to form the gutter for draining, the gutter upper width size is greater than its underpart broad-ruler
Very little, it is thick that the gutter upper portion side wall material thickness is greater than its underpart side wall material；
The thickness material includes: without clast die cut structural
No clast is punched punching pin, is set in upper mold group, and which is provided with the punching flange protruded towards its inside, when described
When no clast punching punching pin punching is located at the type chamber of the gutter front and rear sides, the punching flange is to be punched the draining
The scrap that ditch upper portion side wall is squeezed out to the gutter lower sides；
Chip-removal hole is opened in lower die group, is located on the downside of the no clast punching punching pin, and be punched with the no clast
Punching pin is adapted, the scrap being punched the no clast punching punching pin is discharged.
Thickness material as described above applied to punch forming lead frame is described to be punched the convex of flange without clast die cut structural
Height is 0.25 ㎜ out.
Without clast die cut structural, the punching flange includes thickness material as described above applied to punch forming lead frame
Along the straight body portion of the no clast punching punching pin transverse direction setting and on the left of the straight body portion and be tilted to the right first
Rake, the tilt angle of first rake are 15 °~60 °.
The thickness material applied to punch forming lead frame as described above without clast die cut structural, first rake
Tilt angle is 45 °, and its lower-left starting point is located at the left side of the gutter upper portion side wall.
For thickness material as described above applied to punch forming lead frame without clast die cut structural, first rake is left
Lower starting point is 0.05 ㎜ at a distance from the gutter upper portion side wall.
Without clast die cut structural, the punching flange is also wrapped thickness material as described above applied to punch forming lead frame
Including the second rake for being located at and on the right side of the straight body portion and being tilted to the left, the tilt angle of second rake is 15 °~
60°。
Thickness material as described above applied to punch forming lead frame is without clast die cut structural, the cross of the punching flange
Cross sectional shape is isosceles trapezoid.
Thickness material as described above applied to punch forming lead frame is without clast die cut structural, the no clast punching punching
The making material of son is SLD steel.
Thickness material as described above applied to punch forming lead frame is without clast die cut structural, the no clast punching punching
The surface layer of son is equipped with TD coating after TD is handled.
Compared with prior art, above-mentioned application has the following advantages:
The thickness material that the application is applied to punch forming lead frame passes through the no clast punching punching without clast die cut structural
When son punching is located at the type chamber of the gutter front and rear sides, simultaneously also by the institute being set on the no clast punching punching pin
It states punching flange and is punched the scrap that the gutter upper portion side wall is squeezed out to the gutter lower sides, then realize and cut completely
Except scrap to achieve the purpose that no clast punching thickness material, make to reach through the lead frame of the application punching molding qualified standard,
To which the qualification rate of product can not only be greatly improved, and production efficiency can be also increased substantially to accelerate the production of manufacturing enterprise
Progress, and then it is satisfied with the demand of growing tension, while being also beneficial to that information technology is pushed further to develop.
[Detailed description of the invention]
Fig. 1 is the schematic diagram of existing lead frame.
Fig. 2 is that the cross-sectional view A-A that modified line A-A is splitted is cutd open on the edge Fig. 1.
Fig. 3 is the partial enlarged view I of Fig. 2.
Fig. 4 is the schematic diagram that existing punching punching pin punching is located at type chamber on front side of gutter.
Fig. 5 is that the application is applied to the thickness material of punch forming lead frame without the disconnected view schematic diagram of clast die cut structural.
Fig. 6 be the application be applied to punch forming lead frame thickness material without described in clast die cut structural without clast be punched
The disconnected view of punching pin.
100 it is lead frame, 1001 be gutter, 10011 is that gutter upper portion side wall is squeezed out to gutter lower sides
Scrap, 1 ' be existing punching punching pin, 1 be no clast be punched punching pin, 11 be punched flange, 111 be straight body portion, 112 be first to incline
Inclined portion, 113 are the second rake.
[specific embodiment]
The application is described in further detail below by specific embodiment combination attached drawing.
As shown in figs. 1 to 6, applied to the thickness material of punch forming lead frame without clast die cut structural, the lead frame 100
On offer and rushed, thinned and fine cut technique is to form the gutter 1001 for draining in advance, 1001 top of gutter is wide
It spends size and is greater than its underpart width dimensions, it is thick that the 1001 upper portion side wall material thickness of gutter is greater than its underpart side wall material.The thickness
Thin material includes no clast punching punching pin 1 and chip-removal hole without clast die cut structural.The no clast punching punching pin 1 is set to upper mold group
On, and which is provided with the punching flange 11 protruded towards its inside, when the no clast punching punching of punching pin 1 is located at the gutter
When the type chamber of 1001 front and rear sides, the punching flange 11 is to be punched 1001 upper portion side wall of gutter to the gutter
The scrap 10011 that 1001 lower sides squeeze out.The chip-removal hole is opened in lower die group, is located at the no clast and is punched punching pin 1
Downside, and be adapted with the no clast punching punching pin 1, the scrap being punched the no clast punching punching pin 1 is discharged.
The thickness material that the application is applied to punch forming lead frame passes through the no clast punching punching without clast die cut structural
When 1 punching of son is located at the type chamber of 1001 front and rear sides of gutter, punching pin 1 is punched simultaneously also by the no clast is set to
On the punching flange 11 be punched that 1001 upper portion side wall of gutter squeezes out to 1001 lower sides of gutter it is useless
Bits 10011 then realize that excision scrap makes to achieve the purpose that no clast punching thickness material through the application punching molding completely
Lead frame reaches qualified standard, so that the qualification rate of product can not only be greatly improved, and can also increase substantially production effect
Rate is satisfied with the demand of growing tension to accelerate the manufacturing schedule of manufacturing enterprise, while being also beneficial to push information technology
Further development.
The protrusion height of the punching flange 11 is 0.25 ㎜.It the advantage is that and meet actual demand.
The punching flange 11 includes along the straight body portion 111 that no clast punching 1 transverse direction of punching pin is arranged and being located at
The the first rake 112 straight body portion 111 left side and be tilted to the right, the tilt angle of first rake 112 is 15 °~
60 °, preferably 45 °, and its lower-left starting point is located at the left side of 1001 upper portion side wall of gutter.First rake
112 lower-lefts starting point are 0.05 ㎜ at a distance from 1001 upper portion side wall of gutter.Its object is to guarantee that the punching is convex
Edge 11 is punched the scrap that 1001 upper portion side wall of gutter is squeezed out to 1001 lower sides of gutter completely, and then into one
Step guarantees that the application can be realized no clast punching thickness without clast die cut structural applied to the thickness material of punch forming lead frame
Material.
The punching flange 11 further includes positioned at straight second rake 113 body portion 111 right side and be tilted to the left, institute
State the second rake 113 tilt angle be 15 °~60 °, preferably 45 °, then it is described punching flange 11 cross-sectional shape
For isosceles trapezoid.It the advantage is that and meet actual blanking area.
The making material of the no clast punching punching pin 1 is SLD steel.It the advantage is that SLD steel have high-wearing feature,
The outstanding features such as high compressive strength.
The surface layer of the no clast punching punching pin 1 is equipped with TD coating after TD is handled.It the advantage is that treated through TD
Coefficient of friction can be greatly lowered in the no clast punching punching pin 1, reduce the scratch to product or weigh wounded, and can greatly mention
High anti-seizing property, and can also prolong the service life, save production cost or operating cost.
Presently filed embodiment is explained in detail in summary, but the application is not limited to above embodiment.
Even if it is to the application, various changes can be made, then still falls within the protection scope in the application.
Claims (9)
1. being applied to the thickness material of punch forming lead frame without clast die cut structural, is offered on the lead frame and rushed, beaten in advance
To form the gutter (1001) for draining, gutter (1001) the upper width size is greater than under it thin and fine cut technique
Portion's width dimensions, it is thick that gutter (1001) the upper portion side wall material thickness is greater than its underpart side wall material, which is characterized in that the thickness
Material without clast die cut structural includes:
No clast is punched punching pin (1), is set in upper mold group, and which is provided with the punching flange (11) protruded towards its inside, when
When no clast punching punching pin (1) punching is located at the type chamber of the gutter (1001) front and rear sides, the punching flange
(11) scrap squeezed out to be punched the gutter (1001) upper portion side wall to the gutter (1001) lower sides；
Chip-removal hole is opened in lower die group, is located on the downside of no clast punching punching pin (1), and is punched with the no clast
Punching pin (1) is adapted, the scrap being punched no clast punching punching pin (1) is discharged.
2. the thickness material according to claim 1 applied to punch forming lead frame is without clast die cut structural, feature exists
In: the protrusion height of punching flange (11) is 0.25 ㎜.
3. the thickness material according to claim 2 applied to punch forming lead frame is without clast die cut structural, feature exists
In: punching flange (11) includes the straight body portion (111) being arranged along no clast punching punching pin (1) transverse direction and is located at
Straight first rake (112) body portion (111) left side and be tilted to the right, the tilt angle of first rake (112)
It is 15 °~60 °.
4. the thickness material according to claim 3 applied to punch forming lead frame is without clast die cut structural, feature exists
In: the tilt angle of first rake (112) is 45 °, and its lower-left starting point is located at the gutter (1001) top
The left side of side wall.
5. the thickness material according to claim 4 applied to punch forming lead frame is without clast die cut structural, feature exists
In: the first rake (112) lower-left starting point is 0.05 ㎜ at a distance from the gutter (1001) upper portion side wall.
6. the thickness material according to claim 3 applied to punch forming lead frame is without clast die cut structural, feature exists
In: punching flange (11) further includes the second rake (113) on the right side of the straight body portion (111) and being tilted to the left,
The tilt angle of second rake (113) is 15 °~60 °.
7. the thickness material according to claim 6 applied to punch forming lead frame is without clast die cut structural, feature exists
In: the cross-sectional shape of punching flange (11) is isosceles trapezoid.
8. the thickness material according to claim 1 applied to punch forming lead frame is without clast die cut structural, feature exists
In: the making material of no clast punching punching pin (1) is SLD steel.
9. the thickness material according to claim 8 applied to punch forming lead frame is without clast die cut structural, feature exists
In: the surface layer of no clast punching punching pin (1) is equipped with TD coating after TD is handled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711190692.0A CN107971387B (en) | 2017-11-24 | 2017-11-24 | Thickness material applied to punch forming lead frame is without clast die cut structural |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711190692.0A CN107971387B (en) | 2017-11-24 | 2017-11-24 | Thickness material applied to punch forming lead frame is without clast die cut structural |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107971387A CN107971387A (en) | 2018-05-01 |
| CN107971387B true CN107971387B (en) | 2019-08-13 |
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ID=62011478
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711190692.0A Active CN107971387B (en) | 2017-11-24 | 2017-11-24 | Thickness material applied to punch forming lead frame is without clast die cut structural |
Country Status (1)
| Country | Link |
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| CN (1) | CN107971387B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05237559A (en) * | 1992-02-25 | 1993-09-17 | Amada Metrecs Co Ltd | Counterboring method for flat countersunk head screw and punch used for this method |
| JP2893502B2 (en) * | 1993-07-22 | 1999-05-24 | 株式会社ユタカ技研 | Counterbore hole processing method and processing device for countersunk screws |
| CN1462227A (en) * | 2001-04-27 | 2003-12-17 | 日本碍子株式会社 | Method for deburring in punching operation and method of manufacturing punched product |
| EP1775042A1 (en) * | 2005-10-14 | 2007-04-18 | Gassner Ges. m.b.H. & Co. KG | Method and apparatus for punching a metal sheet |
| CN202105898U (en) * | 2011-05-04 | 2012-01-11 | 亿和精密金属制品(深圳)有限公司 | Progressive die scrapbridge blanking structure without burr |
| CN106216489A (en) * | 2016-08-01 | 2016-12-14 | 钜祥精密模具（苏州）有限公司 | A kind of back of the body male counter sink moulding process |
| CN106862374A (en) * | 2017-03-31 | 2017-06-20 | 西安建筑科技大学 | A kind of counter sink press forming die and technique |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202861106U (en) * | 2012-11-19 | 2013-04-10 | 华一精密机械(昆山)有限公司 | Special-shaped plunger chip type scrap anti-leaping die |
-
2017
- 2017-11-24 CN CN201711190692.0A patent/CN107971387B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05237559A (en) * | 1992-02-25 | 1993-09-17 | Amada Metrecs Co Ltd | Counterboring method for flat countersunk head screw and punch used for this method |
| JP2893502B2 (en) * | 1993-07-22 | 1999-05-24 | 株式会社ユタカ技研 | Counterbore hole processing method and processing device for countersunk screws |
| CN1462227A (en) * | 2001-04-27 | 2003-12-17 | 日本碍子株式会社 | Method for deburring in punching operation and method of manufacturing punched product |
| EP1775042A1 (en) * | 2005-10-14 | 2007-04-18 | Gassner Ges. m.b.H. & Co. KG | Method and apparatus for punching a metal sheet |
| CN202105898U (en) * | 2011-05-04 | 2012-01-11 | 亿和精密金属制品(深圳)有限公司 | Progressive die scrapbridge blanking structure without burr |
| CN106216489A (en) * | 2016-08-01 | 2016-12-14 | 钜祥精密模具（苏州）有限公司 | A kind of back of the body male counter sink moulding process |
| CN106862374A (en) * | 2017-03-31 | 2017-06-20 | 西安建筑科技大学 | A kind of counter sink press forming die and technique |
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| Publication number | Publication date |
|---|---|
| CN107971387A (en) | 2018-05-01 |
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Denomination of invention: Chip free punching structure of thick and thin material applied to stamping forming conductor frame Effective date of registration: 20220104 Granted publication date: 20190813 Pledgee: China Co. truction Bank Corp Zhongshan branch Pledgor: ZHONGSHAN FUSHENG ELECTROMECHANICAL Co.,Ltd. Registration number: Y2021980017363 |