CN111266457A - Stamping and deep-drawing preparation method of shielding case - Google Patents
Stamping and deep-drawing preparation method of shielding case Download PDFInfo
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- CN111266457A CN111266457A CN202010054539.0A CN202010054539A CN111266457A CN 111266457 A CN111266457 A CN 111266457A CN 202010054539 A CN202010054539 A CN 202010054539A CN 111266457 A CN111266457 A CN 111266457A
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- shielding case
- punching
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- namely
- shield
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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
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/001—Shaping combined with punching, e.g. stamping and perforating
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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
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/005—Processes combined with methods covered by groups B21D1/00 - B21D31/00 characterized by the material of the blank or the workpiece
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention relates to a stamping and deep drawing preparation method of a shielding case, which comprises the following steps: s1: punching a guide hole, namely punching a guide round hole on the plate; s2: pre-blanking, namely blanking a blank used by the deep drawing shielding case and an extension leg required by deep drawing; s3: preliminary drawing, namely preliminarily drawing the basic shape of the shielding case, and reserving a circle of area to be subjected to fine drawing; s4: fine drawing, namely performing secondary drawing on the area to be subjected to fine drawing after the primary drawing until the target size of the shielding case is reached; s5: punching a bottom hole, namely punching a bottom hole of the shielding case according to the shape of the bottom hole at the bottom of the shielding case to obtain a shielding case product; s6: punching and blanking, and separating to obtain a finished shielding case product. Compared with the prior art, the deep drawing shielding case disclosed by the invention has the advantages that the design precision of the deep drawing shielding case is improved, the design and manufacturing risks are reduced, the stability of the die is improved, and the maintenance cost of the die is reduced; the whole preparation process can realize continuous and rapid production, and the production efficiency is obviously improved.
Description
Technical Field
The invention relates to a shielding case preparation process, in particular to a shielding case stamping and deep drawing preparation method.
Background
In the mobile phone communication electronic industry, the principle of a mobile phone shielding case is as follows: the component, the circuit, the assembly, the cable or the interference source of the whole system are surrounded by a shielding body, and the interference electromagnetic field is prevented from diffusing outwards; the receiving circuit, device or system is surrounded by a shield to protect them from external electromagnetic fields. The material of the shielding case is generally stainless steel and copper white with a thickness of 0.2 mm. The copper albedo is a metal shielding material which is easy to be coated with tin. The design of the suction cup should be considered when adopting the SMT patch. The flatness of the metal shielding case of the mobile phone is strictly controlled within the tolerance range of 0.05mm to ensure the easy tin-coating performance of the metal shielding case, and the excellent shielding effect generally uses special electronic functions such as signal shielding and the like, and the shielding function is mainly realized by a metal part named as the shielding case of an electronic device.
The shielding case manufacturing process in the current die industry mainly comprises the steps of punching, blanking, deep drawing, bottom hole punching, product falling and the like, wherein the deep drawing is carried out in a convex hull punching mode, the shielding case produced in the convex hull punching mode is prone to cracking and deformation, the production reject ratio is high, the cracking enables the shielding performance of the whole machine to be low after assembly, and the problems of crosstalk, noise and the like can be caused in the mobile phone communication process.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a method for preparing a shielding case by stamping and deep drawing, which improves the design precision of a deep-drawn shielding case, reduces the design and manufacturing risks, improves the stability of a die and reduces the maintenance cost of the die.
The purpose of the invention can be realized by the following technical scheme:
the invention discloses a stamping and deep-drawing preparation method of a shielding case, which comprises the following steps:
s1: punching a guide hole, namely punching a guide round hole on the plate;
s2: pre-blanking, namely blanking a blank used by the deep drawing shielding case and an extension leg required by deep drawing;
s3: preliminary drawing, namely preliminarily drawing the basic shape of the shielding case, and reserving a circle of area to be subjected to fine drawing;
s4: fine drawing, namely performing secondary drawing on the area to be subjected to fine drawing after the primary drawing until the target size of the shielding case is reached;
s5: punching a bottom hole, namely punching a bottom hole of the shielding case according to the shape of the bottom hole at the bottom of the preset shielding case to obtain a shielding case product;
s6: punching and blanking, and separating to obtain a finished shielding case product.
Further, the basic shape of the shielding case is drawn in the preliminary drawing in the S3, the size of the working part is 0.15-0.20 mm larger than the size of the required shielding case on one side, and the working part is reserved for the second drawing.
Further, the dimensions of the work piece in S4 are optimized for the desired shield.
Further, the drawing part in S4 is mounted on the stripper plate.
Furthermore, the stripper plate in S4 is provided with stripper parts, line spring force parts and other equal parts, and the lower die is provided with a rectangular spring force ejector block.
Further, the operation sequence in S4 is drawing before swaging.
Further, the lower die part used in S5 has two level land surfaces, one land surface being in contact with the bottom of the punched material and the other land surface being in contact with the bottom of the punched material.
Further, in S6, the lower punch and the upper punch are set according to the shape of the shield can product, the product shape dimension is completed by guiding and positioning, and the shield can part is separated.
Compared with the prior art, the invention has the following advantages:
1) the design precision of the deep-drawing shielding cover is improved, the design and manufacturing risks are reduced, the stability of the die is improved, and the maintenance cost of the die is reduced.
2) The whole preparation process can realize continuous and rapid production, and the production efficiency is obviously improved.
Drawings
Fig. 1 is a sequence diagram of a shield shell stamping and deep-drawing preparation process in the invention.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
S1: and punching guide holes, namely punching guide round holes in the plate, and referring to a D20 process in the figure 1.
S2: pre-blanking, namely blanking a blank used by the deep drawing shielding case and an extension leg required by deep drawing. See the D21, D22, D23, D24 procedures in fig. 1.
S3: and (3) primary drawing, namely preliminarily drawing the basic shape of the shield cover, and reserving a circle of area to be subjected to finish drawing, which is shown as a procedure D26 in figure 1. In S3, a region to be finely drawn is reserved with a width of 0.15 mm-0.20 mm, see the procedure D26 in FIG. 1. The range of 0.15 mm-0.20 mm is beneficial to plastic deformation in the secondary fine drawing process, enough plastic deformation space is reserved, and the phenomenon of local fracture deformation is avoided. The basic shape of the shielding case is drawn preliminarily, the size of a working part is 0.15-0.20 mm larger than the size of the required shielding case on one side, and the shielding case is reserved for secondary drawing.
S4: and (3) fine drawing, namely performing secondary drawing on the area to be subjected to fine drawing after the primary drawing until the target size of the shield cover is reached, and referring to a step D27 in the figure 1. In the embodiment, the drawing of the plate is realized by matching the female die and the male die in the S3 and the S4. The size of the female die and the male die used in the S3 is larger than that of the female die and the male die used in the S4, and the peripheral size is 0.15-0.20 mm more. And S4, the size of the working part is optimized for the size of the required shielding case, the drawing part is arranged on the stripper plate, the stripper plate is provided with stripper parts, line spring force and other high parts, and the lower die is provided with a rectangular spring force ejector block. The operation sequence in S4 is drawing before pressing.
S5: and punching a bottom hole, namely punching the bottom hole of the shielding case according to the shape of the bottom hole at the bottom of the shielding case to obtain a shielding case product, which is shown in the step D28. The lower die part used in S5 has two flat faces of two heights, one of which is connected to the bottom of the punched material and the other of which is connected to the bottom of the punched material.
S6: punching and blanking, namely punching and cutting off a connecting point of the shielding case product and the blank, and separating to obtain a shielding case finished product, which refers to the procedure D29. And S6, setting a lower punching blade and an upper punching part according to the shape of the shielding case product, finishing the shape size of the product through guiding and positioning, and separating the shielding case part.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (8)
1. The stamping and deep drawing preparation method of the shielding case is characterized by comprising the following steps of:
s1: punching a guide hole, namely punching a guide round hole on the plate;
s2: pre-blanking, namely blanking a blank used by the deep drawing shielding case and an extension leg required by deep drawing;
s3: preliminary drawing, namely preliminarily drawing the basic shape of the shielding case, and reserving a circle of area to be subjected to fine drawing;
s4: fine drawing, namely performing secondary drawing on the area to be subjected to fine drawing after the primary drawing until the target size of the shielding case is reached;
s5: punching a bottom hole, namely punching a bottom hole of the shielding case according to the shape of the bottom hole at the bottom of the preset shielding case to obtain a shielding case product;
s6: punching and blanking, and separating to obtain a finished shielding case product.
2. The shield cover stamping and deep drawing preparation method according to claim 1, characterized in that the basic shape of the shield cover is preliminarily drawn in S3, and the size of the working part is 0.15-0.20 mm larger than the required size of the shield cover on one side.
3. The shield stamping and deep drawing preparation method according to claim 1, wherein the size of the working part in S4 is optimized for the required shield.
4. The shield shell stamping and deep-drawing preparation method according to claim 1, wherein the drawing part in S4 is mounted on a stripper plate.
5. The shield cover stamping and deep drawing preparation method according to claim 1, wherein the stripper plate in S4 is provided with stripper parts and parts with equal line spring force, and the lower die is provided with a rectangular spring force ejector block.
6. The shield shell stamping and deep-drawing preparation method according to claim 1, wherein the operation sequence in the S4 is drawing before pressing.
7. The shield can press-drawing manufacturing method according to claim 1, wherein the lower die member used in S5 has two flat faces of two heights, one flat face being in contact with the bottom of the press material and the other flat face being in contact with the bottom of the blanked material.
8. The shield case press-drawing manufacturing method according to claim 1, wherein the lower cutting edge and the upper cutting part are set according to the shield case product shape in S6, the product shape dimension is completed by guiding and positioning, and the shield case part is separated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010054539.0A CN111266457A (en) | 2020-01-17 | 2020-01-17 | Stamping and deep-drawing preparation method of shielding case |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010054539.0A CN111266457A (en) | 2020-01-17 | 2020-01-17 | Stamping and deep-drawing preparation method of shielding case |
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| CN111266457A true CN111266457A (en) | 2020-06-12 |
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| CN202010054539.0A Pending CN111266457A (en) | 2020-01-17 | 2020-01-17 | Stamping and deep-drawing preparation method of shielding case |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112845844A (en) * | 2020-12-31 | 2021-05-28 | 湖南徕木电子有限公司 | Tearing and stretching type preparation method of shielding case |
| CN114011960A (en) * | 2021-09-27 | 2022-02-08 | 深圳市信维通信股份有限公司 | Deep drawing and stamping forming process for L-shaped profile thin metal shell |
| CN114733952A (en) * | 2022-03-21 | 2022-07-12 | 深圳市长盈精密技术股份有限公司 | Molding method of shielding part and progressive die thereof |
| CN116441421A (en) * | 2023-06-20 | 2023-07-18 | 扬州安顺电气有限公司 | Intelligent processing method of shielding case |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6430799B1 (en) * | 2000-02-01 | 2002-08-13 | American Engineered Components, Inc. | Method for constructing a one-piece bulbshield |
| CN102284621A (en) * | 2011-07-27 | 2011-12-21 | 东莞市大忠电子有限公司 | Double-hole shielding cover progressive die |
| CN104096747A (en) * | 2013-04-11 | 2014-10-15 | 昆山昌禾精密电子有限公司 | Integrated motor housing machining method and used motor shell punch forming die |
| CN109513815A (en) * | 2018-10-16 | 2019-03-26 | 浙江捷汽车零部件有限公司 | A kind of processing technology of electric automobile battery box upper cover |
| CN110102625A (en) * | 2019-03-18 | 2019-08-09 | 景瓷精密零部件（桐乡）有限公司 | The method for stretching shielding case |
-
2020
- 2020-01-17 CN CN202010054539.0A patent/CN111266457A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6430799B1 (en) * | 2000-02-01 | 2002-08-13 | American Engineered Components, Inc. | Method for constructing a one-piece bulbshield |
| CN102284621A (en) * | 2011-07-27 | 2011-12-21 | 东莞市大忠电子有限公司 | Double-hole shielding cover progressive die |
| CN104096747A (en) * | 2013-04-11 | 2014-10-15 | 昆山昌禾精密电子有限公司 | Integrated motor housing machining method and used motor shell punch forming die |
| CN109513815A (en) * | 2018-10-16 | 2019-03-26 | 浙江捷汽车零部件有限公司 | A kind of processing technology of electric automobile battery box upper cover |
| CN110102625A (en) * | 2019-03-18 | 2019-08-09 | 景瓷精密零部件（桐乡）有限公司 | The method for stretching shielding case |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112845844A (en) * | 2020-12-31 | 2021-05-28 | 湖南徕木电子有限公司 | Tearing and stretching type preparation method of shielding case |
| CN112845844B (en) * | 2020-12-31 | 2022-06-28 | 湖南徕木电子有限公司 | Tearing and stretching type preparation method of shielding case |
| CN114011960A (en) * | 2021-09-27 | 2022-02-08 | 深圳市信维通信股份有限公司 | Deep drawing and stamping forming process for L-shaped profile thin metal shell |
| CN114011960B (en) * | 2021-09-27 | 2024-06-11 | 深圳市信维通信股份有限公司 | Deep-drawing stamping forming process for L-shaped thin metal shell |
| CN114733952A (en) * | 2022-03-21 | 2022-07-12 | 深圳市长盈精密技术股份有限公司 | Molding method of shielding part and progressive die thereof |
| CN116441421A (en) * | 2023-06-20 | 2023-07-18 | 扬州安顺电气有限公司 | Intelligent processing method of shielding case |
| CN116441421B (en) * | 2023-06-20 | 2023-09-15 | 扬州安顺电气有限公司 | Intelligent processing method of shielding case |
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Application publication date: 20200612 |