CN112775254A - Stamping process based on lithium battery cap - Google Patents
Stamping process based on lithium battery cap Download PDFInfo
- Publication number
- CN112775254A CN112775254A CN202110079253.2A CN202110079253A CN112775254A CN 112775254 A CN112775254 A CN 112775254A CN 202110079253 A CN202110079253 A CN 202110079253A CN 112775254 A CN112775254 A CN 112775254A
- Authority
- CN
- China
- Prior art keywords
- stamping
- blank
- lithium battery
- battery cap
- stamping process
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000001816 cooling Methods 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000011248 coating agent Substances 0.000 claims abstract description 8
- 238000000576 coating method Methods 0.000 claims abstract description 8
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000005498 polishing Methods 0.000 claims abstract description 5
- 238000004321 preservation Methods 0.000 claims abstract description 5
- 238000005253 cladding Methods 0.000 claims description 6
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 4
- 239000004970 Chain extender Substances 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 238000004806 packaging method and process Methods 0.000 claims description 4
- 229920005862 polyol Polymers 0.000 claims description 4
- 150000003077 polyols Chemical class 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 239000010410 layer Substances 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000011241 protective layer Substances 0.000 abstract description 3
- 238000004080 punching Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- 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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/201—Work-pieces; preparation of the work-pieces, e.g. lubricating, coating
-
- 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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/16—Heating or cooling
-
- 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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/18—Lubricating, e.g. lubricating tool and workpiece simultaneously
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/1418—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/1769—Handling of moulded articles or runners, e.g. sorting, stacking, grinding of runners
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/1418—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure
- B29C2045/14237—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure the inserts being deformed or preformed outside the mould or mould cavity
- B29C2045/14245—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure the inserts being deformed or preformed outside the mould or mould cavity using deforming or preforming means outside the mould cavity
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses a stamping process based on a lithium battery cap, relates to the field of battery cap production, and provides the following scheme aiming at the problem that cracks are easy to appear outside a product in the stamping process of the lithium battery cap, wherein the stamping process comprises the following steps: step one, blank processing, namely automatically carrying out rust removal processing on the surface of the blank through a polishing wheel; step two, putting the blank processed in the step one into a high-temperature box for processing and heat preservation for 1-1.5h, then taking out the blank and putting the blank into water for cooling for 1-2h to obtain a blank A; and step three, coating a layer of stamping oil in the stamping die. According to the invention, through multiple stamping and stretching, the deformation amount in each stamping process is reduced, cracks are prevented from appearing outside the stamping part, the quality of the battery cap is improved, and meanwhile, the stamping part is directly placed into a die for injecting molten TPU plastic, so that an insulating protective layer is directly formed outside the cap, the processing steps are simplified, and the overall efficiency is improved.
Description
Technical Field
The invention relates to the field of production of battery caps, in particular to a stamping process based on a lithium battery cap.
Background
The lithium battery cap plays a role in sealing the battery, providing a safety valve and a positive conductive terminal. In traditional production process, the lithium battery cap is directly formed by one-time stamping and stretching, the stamping force borne by raw materials is large, cracks are easily caused to appear outside a stamping part, the qualified rate of products is reduced, an insulating protective layer is added outside the lithium battery cap, a plurality of operations are needed, the efficiency is low, and therefore the stamping process based on the lithium battery cap is provided.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a stamping process based on a lithium battery cap.
In order to achieve the purpose, the invention adopts the following technical scheme:
a stamping process based on a lithium battery cap comprises the following steps:
step one, blank processing, namely automatically carrying out rust removal processing on the surface of the blank through a polishing wheel;
step two, putting the blank processed in the step one into a high-temperature box for processing and heat preservation for 1-1.5h, then taking out the blank and putting the blank into water for cooling for 1-2h to obtain a blank A;
step three, coating a layer of stamping oil in the stamping die;
step four, fixing the blank A in the step two on the top of the die in the step three, selecting a punch with the diameter of 4cm, realizing one-time stamping and stretching, and obtaining a semi-stamped part B;
step five, automatically spraying water to cool the semi-stamped part B in the step four, then drying the semi-stamped part B, and smearing a layer of stamping oil on the concave part of the semi-stamped part B;
step six, selecting a punch with the diameter being the diameter of the standard lithium battery, and repeating the operation in the step four to obtain a stamping part C;
step seven, injecting melted TPU plastic into a cylindrical die, putting the stamping part C in the step six into the cylindrical die, cooling and molding, and taking out to obtain a coating part D;
step eight, cutting off redundant external materials of the cladding member D, and exposing the front side and the back side of the stamping member C, which are directly connected with the internal and external components of the battery, so as to obtain a lithium battery cap;
and step nine, detecting the lithium battery cap in the step eight, and packaging qualified products to leave a factory.
Preferably, the temperature in the high temperature box in the second step is 700-.
Preferably, the depth of the first drawing in the fourth step is controlled to be one third of the standard depth.
Preferably, the TPU plastic in the seventh step is prepared from 7 parts of diphenylmethane diisocyanate, 4 parts of toluene diisocyanate, 4 parts of macromolecular polyol and 3 parts of chain extender, and the TPU plastic plays an insulating and protecting role on the lithium battery cap.
Preferably, the thickness of the outer TPU plastic of the covering D in the step eight is 0.3 to 0.5 mm.
According to the invention, through multiple stamping and stretching, the deformation amount in each stamping process is reduced, cracks are prevented from appearing outside the stamping part, the quality of the battery cap is improved, and meanwhile, the stamping part is directly placed into a die for injecting molten TPU plastic, so that an insulating protective layer is directly formed outside the cap, the processing steps are simplified, and the overall efficiency is improved.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
Example one
A stamping process based on a lithium battery cap comprises the following steps:
step one, blank processing, namely automatically carrying out rust removal processing on the surface of the blank through a polishing wheel;
step two, putting the blank processed in the step one into a high-temperature box for processing and heat preservation for 1-1.5h, then taking out the blank and putting the blank into water for cooling for 1-2h to obtain a blank A;
step three, coating a layer of stamping oil in the stamping die;
step four, fixing the blank A in the step two on the top of the die in the step three, selecting a punch with the diameter being the diameter of a standard lithium battery, realizing punching and stretching, and obtaining a semi-punching part B;
step five, automatically spraying water to cool the semi-stamped part B in the step four, and then drying the stamped part B;
step six, injecting melted TPU plastic into a cylindrical die, putting the stamping part B in the step five into the cylindrical die, cooling and molding, and taking out to obtain a cladding part D;
seventhly, cutting off redundant external materials of the coating part D, and exposing the front side and the back side of the stamping part B, which are directly connected with the internal and external parts of the battery, so as to obtain a lithium battery cap;
and step eight, detecting the lithium battery cap in the step eight, and packaging qualified products to leave a factory.
In this embodiment, the temperature inside the high temperature chamber in the second step is 700-.
In the sixth embodiment, the TPU plastic used in the step six is made from 7 parts of diphenylmethane diisocyanate, 4 parts of toluene diisocyanate, 4 parts of macromolecular polyol, and 3 parts of a chain extender, and the TPU plastic has an insulation protection effect on the lithium battery cap.
In this embodiment, the thickness of the TPU plastic outside the covering member D in step seven is 0.3 to 0.5 mm.
Example two
A stamping process based on a lithium battery cap comprises the following steps:
step one, blank processing, namely automatically carrying out rust removal processing on the surface of the blank through a polishing wheel;
step two, putting the blank processed in the step one into a high-temperature box for processing and heat preservation for 1-1.5h, then taking out the blank and putting the blank into water for cooling for 1-2h to obtain a blank A;
step three, coating a layer of stamping oil in the stamping die;
step four, fixing the blank A in the step two on the top of the die in the step three, selecting a punch with the diameter of 4cm, realizing one-time stamping and stretching, and obtaining a semi-stamped part B;
step five, automatically spraying water to cool the semi-stamped part B in the step four, then drying the semi-stamped part B, and smearing a layer of stamping oil on the concave part of the semi-stamped part B;
step six, selecting a punch with the diameter being the diameter of the standard lithium battery, and repeating the operation in the step four to obtain a stamping part C;
step seven, injecting melted TPU plastic into the cylindrical die, putting the stamping part C in the step six into the cylindrical die, cooling and molding, and taking out to obtain a cladding part D;
step eight, cutting off redundant external materials of the cladding member D, and exposing the front side and the back side of the stamping member C, which are directly connected with the internal and external components of the battery, so as to obtain a lithium battery cap;
and step nine, detecting the lithium battery cap in the step eight, and packaging qualified products to leave a factory.
In this embodiment, the temperature inside the high temperature chamber in the second step is 700-.
In this embodiment, the depth of the first drawing in step four is controlled to be one third of the standard depth.
In the embodiment, the TPU plastic in the seventh step is made from 7 parts of diphenylmethane diisocyanate, 4 parts of toluene diisocyanate, 4 parts of macromolecular polyol and 3 parts of a chain extender, and the TPU plastic has an insulation protection effect on the lithium battery cap.
In this embodiment, the thickness of the TPU plastic outside the covering member D in step eight is 0.3 to 0.5 mm.
According to the invention, through carrying out one-time stamping and stretching and multiple-time stamping and stretching on the blank, fewer stamping cracks are generated outside the stamping part subjected to multiple-time stamping and stretching than those generated by one-time direct stamping and stretching, so that through multiple stamping, the stamping cracks are more favorably reduced, the product quality is improved, the number of generated cracks is reduced, and the product quality is improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (5)
1. A stamping process based on a lithium battery cap is characterized by comprising the following steps:
step one, blank processing, namely automatically carrying out rust removal processing on the surface of the blank through a polishing wheel;
step two, putting the blank processed in the step one into a high-temperature box for processing and heat preservation for 1-1.5h, then taking out the blank and putting the blank into water for cooling for 1-2h to obtain a blank A;
step three, coating a layer of stamping oil in the stamping die;
step four, fixing the blank A in the step two on the top of the die in the step three, selecting a punch with the diameter of 4cm, realizing one-time stamping and stretching, and obtaining a semi-stamped part B;
step five, automatically spraying water to cool the semi-stamped part B in the step four, then drying the semi-stamped part B, and smearing a layer of stamping oil on the concave part of the semi-stamped part B;
step six, selecting a punch with the diameter being the diameter of the standard lithium battery, and repeating the operation in the step four to obtain a stamping part C;
step seven, injecting melted TPU plastic into a cylindrical die, putting the stamping part C in the step six into the cylindrical die, cooling and molding, and taking out to obtain a coating part D;
step eight, cutting off redundant external materials of the cladding member D, and exposing the front side and the back side of the stamping member C, which are directly connected with the internal and external components of the battery, so as to obtain a lithium battery cap;
and step nine, detecting the lithium battery cap in the step eight, and packaging qualified products to leave a factory.
2. The stamping process based on the lithium battery cap as claimed in claim 1, wherein the temperature inside the high temperature box in the second step is 700-800 ℃.
3. The lithium battery cell cap-based stamping process according to claim 1, wherein the depth of the first stamping and drawing in the fourth step is controlled to be one third of the standard depth.
4. The stamping process based on the lithium battery cap as claimed in claim 1, wherein the TPU plastic in step seven is made from 7 parts of diphenylmethane diisocyanate, 4 parts of toluene diisocyanate, 4 parts of macromolecular polyol and 3 parts of chain extender, and the TPU plastic has an insulation protection effect on the lithium battery cap.
5. The stamping process based on a lithium battery cap as claimed in claim 1, wherein the thickness of the TPU plastic outside the cladding D in the step eight is 0.3-0.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110079253.2A CN112775254A (en) | 2021-01-21 | 2021-01-21 | Stamping process based on lithium battery cap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110079253.2A CN112775254A (en) | 2021-01-21 | 2021-01-21 | Stamping process based on lithium battery cap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112775254A true CN112775254A (en) | 2021-05-11 |
Family
ID=75758127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110079253.2A Pending CN112775254A (en) | 2021-01-21 | 2021-01-21 | Stamping process based on lithium battery cap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112775254A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1193033A (en) * | 1998-03-05 | 1998-09-16 | 晏林宝 | Hot-dipping stripped plastic protective film for plastics, mfg. method and application thereof |
| JP2002143934A (en) * | 2000-11-08 | 2002-05-21 | Seiko Epson Corp | Die |
| CN101760092A (en) * | 2008-10-08 | 2010-06-30 | 张卫亚 | Hot-melting strippable plastic |
| US20130075026A1 (en) * | 2011-09-27 | 2013-03-28 | Yu-Chih Chang | Method for bonding plastic mold member onto metal housing |
| CN105522684A (en) * | 2014-12-25 | 2016-04-27 | 比亚迪股份有限公司 | Metal-resin composite as well as preparation method thereof and electronic product shell |
| CN207271923U (en) * | 2017-10-19 | 2018-04-27 | 上海科达利五金塑胶有限公司 | Battery case processing unit (plant) |
| CN109201837A (en) * | 2018-08-15 | 2019-01-15 | 东莞市瑞成精密模具有限公司 | A kind of battery steel shell drawing process |
| JP6506442B1 (en) * | 2018-04-25 | 2019-04-24 | 繆漢平 | Method of manufacturing negative electrode metal cap of button type lithium battery |
-
2021
- 2021-01-21 CN CN202110079253.2A patent/CN112775254A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1193033A (en) * | 1998-03-05 | 1998-09-16 | 晏林宝 | Hot-dipping stripped plastic protective film for plastics, mfg. method and application thereof |
| JP2002143934A (en) * | 2000-11-08 | 2002-05-21 | Seiko Epson Corp | Die |
| CN101760092A (en) * | 2008-10-08 | 2010-06-30 | 张卫亚 | Hot-melting strippable plastic |
| US20130075026A1 (en) * | 2011-09-27 | 2013-03-28 | Yu-Chih Chang | Method for bonding plastic mold member onto metal housing |
| CN105522684A (en) * | 2014-12-25 | 2016-04-27 | 比亚迪股份有限公司 | Metal-resin composite as well as preparation method thereof and electronic product shell |
| CN207271923U (en) * | 2017-10-19 | 2018-04-27 | 上海科达利五金塑胶有限公司 | Battery case processing unit (plant) |
| JP6506442B1 (en) * | 2018-04-25 | 2019-04-24 | 繆漢平 | Method of manufacturing negative electrode metal cap of button type lithium battery |
| CN109201837A (en) * | 2018-08-15 | 2019-01-15 | 东莞市瑞成精密模具有限公司 | A kind of battery steel shell drawing process |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210511 |