CN110935789B - Process for stretching and punching flanging hole on lithium zinc battery shell and punching device thereof - Google Patents
Process for stretching and punching flanging hole on lithium zinc battery shell and punching device thereof Download PDFInfo
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- CN110935789B CN110935789B CN201911276130.7A CN201911276130A CN110935789B CN 110935789 B CN110935789 B CN 110935789B CN 201911276130 A CN201911276130 A CN 201911276130A CN 110935789 B CN110935789 B CN 110935789B
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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
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
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Abstract
The invention discloses a process for drawing and punching flanging hole of lithium zinc battery shell, which comprises the steps of primary drawing treatment, primary annealing treatment, secondary drawing treatment, secondary annealing treatment, tertiary drawing treatment, tertiary annealing treatment, primary cold extrusion and drawing treatment, secondary cold extrusion and drawing treatment and punching flanging hole treatment; also discloses a flanging hole punching device for the shell of the lithium zinc batteries; also discloses a lithium zinc battery shell. The invention adopts three times of stretching-annealing treatment to optimize the stretching processing technology of the battery shell, strictly controls the hardness of the battery shell, ensures that the battery shell is uniformly stretched, avoids wrinkling, has high stretching forming precision and meets the packaging requirement of the battery shell; on the other hand, the cold extrusion stretching treatment and the flanging hole punching treatment are carried out on the bottom of the shell for two times, pre-punching on the bottom of the battery shell is not needed, the punching process of the flanging hole is finished under the condition that the battery shell with small size is not wrinkled, and the working efficiency is high.
Description
Technical Field
The invention relates to the field of lithium battery production, in particular to a process for stretching and punching flanging hole on a shell of a lithium zinc battery and a punching device thereof.
Background
The traditional preparation process of the battery shell generally comprises a primary stretching-annealing process, in the processing process, shell blanks are easy to accumulate to cause wrinkling, the stretching coefficient is low, the stretching is uneven, the packaging precision is greatly influenced, the next process cannot be carried out, the structure of the battery shell with small volume is complex, the precision requirement is high, and the stretching under the condition of no wrinkling is difficult to ensure. On the other hand, the current liquid injection hole is generally arranged at the top of the battery shell, and in the process of punching the liquid injection hole, processing methods such as pre-punching, flanging, punching and forming and the like need to be carried out on the shell blank; in addition, a processing method of welding a bottom plate with a liquid injection hole on the bottom of the battery case can also be adopted, but the processing method requires the thickness of the bottom plate to be more than 1.2mm, so that the processing technology is very complicated. However, for miniature lithium zinc oxide battery shell can not use the processing method, when the battery shell packaging precision requirements are high, it is difficult to control the liquid hole flanging quality. Therefore, how to solve the problem that the small-sized battery shell is punched with a high-precision bottom flanging liquid injection hole under the condition of no wrinkle during stretching becomes a main technical problem in the current micro battery production field.
Disclosure of Invention
In order to overcome the technical problem, the invention discloses a lithium zinc battery shell stretching and punching flanging hole technology; also discloses a flanging hole punching device for the shell of the battery containing zinc and zinc; also discloses a kind of lithium zinc battery shell.
The technical scheme adopted by the invention for realizing the purpose is as follows:
a kind of lithium zinc battery shell stretching and punching flanging hole technology, it includes the following steps:
step one, performing first annealing treatment on a shell blank after the first stretching treatment is completed;
step two, after the shell blank subjected to the step one is subjected to secondary stretching treatment, carrying out secondary annealing treatment;
step three, after the third stretching treatment is carried out on the shell blank subjected to the step two, carrying out third annealing treatment to obtain a stretched and formed shell blank;
step four, performing primary cold extrusion stretching treatment on the bottom of the shell blank subjected to the step three;
step five, performing secondary cold extrusion stretching treatment on the bottom of the shell blank subjected to the step four to obtain a battery shell with a pre-flanged bottom;
and step six, performing punching flanging hole treatment on the bottom of the battery shell which is subjected to the step five to obtain the battery shell with the flanging hole at the bottom.
In the above process for drawing and punching flanged holes of zinc and zinc lithium batteries, the annealing temperature of the first annealing treatment, the second annealing treatment and the third annealing treatment is 1050-.
In the process for drawing and punching a burring hole in a lithium zinc oxide battery case, the first drawing treatment, the second drawing treatment and the third drawing treatment have a drawing coefficient of 0.7 to 0.9.
In the process for drawing and punching the flanging hole of the lithium zinc oxide battery shell, the shell blank in the first step is placed on a conveyer belt, and the belt speed of the conveyer belt is 20-30 min/cm.
In the process for stretching and punching flanging hole of the lithium zinc battery shell, the fourth step and the fifth step are operated at a cold extrusion stretching station, and the cold extrusion stretching station comprises a first fixed female die, and a first discharging mechanism and a flanging punch which are correspondingly arranged above and below the first fixed female die;
the first fixing female die comprises a fixing section for fixing the shell blank and a punching section for the flanging punch to penetrate through, the inner diameter of the fixing section is gradually reduced from top to bottom, the first discharging mechanism comprises an inner fixing piece for fixing the inner wall of the shell blank and a discharging punch penetrating through the inner fixing piece, and the discharging punch corresponds to the flanging punch.
The lithium zinc battery shell stretching and flanging hole punching process, wherein the sixth step in the flanging hole punching station operation; the flanging hole punching station comprises a second fixed female die, and a second discharging mechanism and a perforating punch which are correspondingly arranged above and below the second fixed female die; the structure of the second fixed female die is the same as that of the first fixed female die, and the structure of the second discharging mechanism is the same as that of the first discharging mechanism.
A kind of lithium zinc and zinc battery shell's flanging hole stamping device, it includes the cold extrusion that sets up in order according to the processing sequence of the battery shell stretches the station and punches the flanging hole station;
the cold extrusion stretching station comprises a first fixed female die, a first discharging mechanism and a flanging punch, wherein the first discharging mechanism and the flanging punch are correspondingly arranged above and below the first fixed female die;
the flanging hole punching station comprises a second fixed female die, and a second discharging mechanism and a perforating punch which are correspondingly arranged above and below the second fixed female die;
and a first elastic buffer element is arranged corresponding to the first unloading mechanism and the second unloading mechanism, and a second elastic buffer element is arranged corresponding to the flanging punch and the perforating punch.
Foretell lithium zinc and zinc battery case's flanging hole stamping device, wherein first fixed die with the structure of the fixed die of second is the same, first fixed die is including the canned paragraph that is used for fixed shell blank and confession the punching press section that the turn-ups drift was worn to put, the internal diameter top-down of canned paragraph reduces gradually.
Foretell lithium zinc and zinc battery case's flanging hole stamping device, wherein first shedding mechanism with second shedding mechanism's structure is the same, first shedding mechanism is including the interior mounting that is used for fixed shell blank inner wall and runs through the drift of unloading that interior mounting set up, the drift of unloading corresponds the setting of flanging drift.
A kind of lithium zinc and zinc battery shell, its bottom has a flanging hole, and it adopts the above-mentioned lithium zinc and zinc battery shell stretching and punching flanging hole technology to process.
The invention has the beneficial effects that: the stretching processing technology of the battery shell is optimized by adopting three times of stretching-annealing treatment, the stretching coefficient is increased by 0.2 compared with the traditional stretching technology, the hardness of the battery shell is strictly controlled, the battery shell is uniformly stretched, the wrinkling phenomenon is avoided, the stretching forming precision is high, and the packaging requirement of the battery shell is met; on the other hand, the punching process of the flanging hole is finished under the condition that the small-size battery shell is not wrinkled by performing cold extrusion stretching treatment and punching the flanging hole on the bottom of the shell for two times; the cold extrusion extension station and the flanging hole punching station are arranged for simultaneous processing, pre-punching on the bottom of the battery shell is not needed, and the working efficiency is greatly improved; the flanging hole is ensured to have good precision by matching the first unloading mechanism with the flanging punch, the second unloading mechanism with the perforating punch, and the damage is avoided without influencing the stretching forming effect; in addition, the processing speed of the process is strictly controlled, the process of fully drawing and punching the flanging hole on the shell blank is ensured, and the purposes of high quality and high performance are achieved.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic front view of a flanging hole stamping apparatus according to the present invention;
FIG. 2 is a schematic structural front view of a first fixed female die and a flanging punch of the present invention;
FIG. 3 is an enlarged view of the portion A in FIG. 1 according to the present invention.
Detailed Description
The present invention is further illustrated by the following specific examples, which are intended to facilitate the understanding and appreciation of the technical solutions of the present invention, rather than to limit the invention thereto.
Example (b): referring to fig. 1 to 3, this embodiment provides a lithium zinc battery shell stretching and punching flanging hole process, which includes the following steps:
step one, after the shell blank 91 is subjected to primary stretching treatment, primary annealing treatment is carried out;
step two, after the shell blank 91 which is subjected to the step one is subjected to secondary stretching treatment, secondary annealing treatment is carried out;
step three, after the third stretching treatment is carried out on the shell blank 91 after the step two is finished, carrying out third annealing treatment to obtain a shell blank 91 which is formed by stretching;
step four, performing primary cold extrusion stretching treatment on the bottom of the shell blank 91 after the step three is completed;
step five, performing secondary cold extrusion stretching treatment on the bottom of the shell blank 91 after the step four to obtain a battery shell 92 with a pre-flanged bottom;
and step six, performing punching flanging hole treatment on the bottom of the battery shell 92 after the step five is completed to obtain the battery shell 92 with the flanging hole at the bottom.
Preferably, the annealing temperature of the first annealing treatment, the second annealing treatment and the third annealing treatment is 1050-; in order to control the battery case 92 to have a suitable hardness without wrinkling, three annealing treatments are performed during the stretching process to ensure that the battery case 92 has high stretch forming precision and does not wrinkle.
Further, the first stretching treatment, the second stretching treatment and the third stretching treatment have a stretching coefficient of 0.7 to 0.9.
Specifically, the thickness of the shell blank 91 is 0.5mm, and the stretching coefficient is increased by 0.2 compared with that of the traditional stretching process by adopting three times of sectional stretching treatment, so that the shell blank 91 is uniformly stretched, and the packaging requirement of the battery shell 92 is met.
Further, the shell blank 91 in the first step is placed on a conveyer belt, the belt speed of the conveyer belt is 20-30min/cm, the belt speed is strictly controlled, so that the shell blank 91 is fully stretched and punched to form the flanging hole, and the working efficiency is improved.
Preferably, the fourth step and the fifth step are operated at a cold extrusion stretching station, wherein the cold extrusion stretching station comprises a first fixed female die 1, a first unloading mechanism 2 and a flanging punch 3 which are correspondingly arranged above and below the first fixed female die 1;
the first fixing female die 1 comprises a fixing section 11 for fixing the shell blank 91 and a punching section 12 for the flanging punch 3 to penetrate through, the inner diameter of the fixing section 11 is gradually reduced from top to bottom, the first discharging mechanism 2 comprises an inner fixing piece 21 for fixing the inner wall of the shell blank 91 and a discharging punch 22 penetrating through the inner fixing piece 21, and the discharging punch 22 is arranged corresponding to the flanging punch 3; specifically, the punching end of the flanging punch 3 is a flat punch, so that a pre-flanging slot is conveniently and stably punched at the bottom of the shell blank 91, the inclination of the inner wall surface of the fixing section 11 is 15 degrees, the battery shell 92 is conveniently placed without influencing the stretch forming effect; in the punching process of the flanging hole, the shell blank 91 is placed in the fixing section 11 of the first fixing female die 1, the upper die 81 drives the first discharging mechanism 2 to descend, the inner fixing piece 21 is clamped in the shell blank 91 to fix the shell blank 91, after the flanging punch 3 finishes the pre-flanging operation, the discharging punch 22 props against the bottom of the shell blank 91, so that the inner fixing piece 21 is separated from the shell blank 91, and the shell blank 91 is stably separated from the cold extrusion extension station under the condition of no wrinkle through the matching use of the inner fixing piece 21 and the discharging punch 22.
Further, the sixth step is operated at a flanging hole punching station; the flanging hole punching station comprises a second fixed female die 4, and a second discharging mechanism 5 and a perforating punch 6 which are correspondingly arranged above and below the second fixed female die 4; the structure of the second fixed female die 4 is the same as that of the first fixed female die 1, the structure of the second discharging mechanism 5 is the same as that of the first discharging mechanism 2, and the working process of the second discharging mechanism 5 is the same as that of the first discharging mechanism 2; specifically, the punching end of the punching punch 6 is a conical punch, so that the pre-flanging slot is conveniently pierced to form a flanging hole, and the hole position punching precision is high.
Specifically, the cold extrusion extension station and the flanging hole punching station are both arranged in a stamping die, the stamping die comprises an upper die 81 and a lower die 82 which are correspondingly arranged, the upper die 81 and the lower die 82 are respectively arranged on a stamping device, the first fixed female die 1 and the second fixed female die 4 are respectively arranged on the lower die 82, the flanging punch 3 and the piercing punch 6 are arranged on the lower die 82 through a second elastic buffer element 72, the first unloading mechanism 2 and the second unloading mechanism 5 are arranged on the upper die 81 through a first elastic buffer element 71, wherein the first elastic buffer element 71 and the second elastic buffer element 72 both adopt nitrogen springs, so that the flanging hole punching operation of the battery shell 92 is completed without wrinkling, and the packaging requirement of the battery shell 92 is met; specifically, in the punching process of the flanging hole, the stretched and formed shell blank 91 is placed in the first fixed female die 1, the punching device works to drive the first unloading mechanism 2 to descend and fix the shell blank 91, and at the moment, the flanging punch 3 performs cold extrusion stretching treatment twice on the bottom of the shell blank 91 to obtain a battery shell 92 with a pre-flanged bottom, so as to realize pre-flanging operation of the flanging hole; the battery shell 92 with the pre-flanged bottom is moved into the second fixing female die 4, the second discharging mechanism 5 descends and fixes the battery shell 92, the piercing punch 6 punches the flanging hole in the bottom of the battery shell 92 to obtain the battery shell 92 with the flanging hole in the bottom, and the cold extrusion stretching station and the flanging hole punching station work simultaneously, so that the working efficiency is high.
A kind of lithium zinc and zinc battery shell's flanging hole stamping device, it includes the cold extrusion that sets up in order according to the processing sequence of the battery shell stretches the station and punches the flanging hole station;
the cold extrusion stretching station comprises a first fixed female die 1, a first discharging mechanism 2 and a flanging punch 3, wherein the first discharging mechanism 2 and the flanging punch 3 are correspondingly arranged above and below the first fixed female die 1;
the flanging hole punching station comprises a second fixed female die 4, and a second discharging mechanism 5 and a perforating punch 6 which are correspondingly arranged above and below the second fixed female die 4;
a first elastic buffer element 71 is provided for the first discharging device 2 and the second discharging device 5, and a second elastic buffer element 72 is provided for the flanging punch 3 and the piercing punch 6.
Preferably, the flanging hole punching device further comprises an upper die 81 and a lower die 82 which are correspondingly arranged, the upper die 81 and the lower die 82 are respectively installed on the punching device, the first fixed female die 1 and the second fixed female die 4 are respectively installed on the lower die 82, the flanging punch 3 and the piercing punch 6 are installed on the lower die 82 through the second elastic buffer element 72, the first discharging mechanism 2 and the second discharging mechanism 5 are installed on the upper die 81 through the first elastic buffer element 71, wherein the first elastic buffer element 71 and the second elastic buffer element 72 both adopt nitrogen springs, so that the flanging hole punching operation of the battery case 92 is completed without wrinkling, and the packaging requirement of the battery case 92 is met; specifically, in the punching process of the flanging hole, the stretched and formed shell blank 91 is placed in the first fixed female die 1, the punching device works to drive the first unloading mechanism 2 to descend and fix the shell blank 91, and at the moment, the flanging punch 3 performs cold extrusion stretching treatment twice on the bottom of the shell blank 91 to obtain a battery shell 92 with a pre-flanged bottom, so as to realize pre-flanging operation of the flanging hole; the battery shell 92 with the pre-flanged bottom is moved into the second fixing female die 4, the second discharging mechanism 5 descends and fixes the battery shell 92, the piercing punch 6 punches the flanging hole in the bottom of the battery shell 92 to obtain the battery shell 92 with the flanging hole in the bottom, and the cold extrusion stretching station and the flanging hole punching station work simultaneously, so that the working efficiency is high.
Further, the first fixed female die 1 is the same as the second fixed female die 4 in structure, the first fixed female die 1 comprises a fixing section 11 for fixing the shell blank 91 and a punching section 12 for penetrating the flanging punch 3, the inner diameter of the fixing section 11 is gradually reduced from top to bottom, the inclination of the inner wall surface of the fixing section 11 is 15 degrees, the battery shell 92 can be placed conveniently, and the stretching forming effect is not affected.
Further, the first discharging mechanism 2 and the second discharging mechanism 5 have the same structure, the first discharging mechanism 2 includes an inner fixing member 21 for fixing the inner wall of the shell blank 91 and a discharging punch 22 penetrating through the inner fixing member 21, the discharging punch 22 is disposed corresponding to the flanging punch 3, the upper die 81 drives the first discharging mechanism 2 to descend during the punching process of the flanging hole, the inner fixing member 21 is clamped in the shell blank 91 to fix the shell blank 91, after the flanging punch 3 completes the pre-flanging operation, the discharging punch 22 abuts against the bottom of the shell blank 91 to separate the inner fixing member 21 from the shell blank 91, the second discharging mechanism 5 has the same working process as the first discharging mechanism 2, and is used by matching the inner fixing member 21 with the discharging punch 22, the shell blank 91 is smoothly removed from the cold extrusion draw station without wrinkling.
A kind of lithium zinc and zinc battery shell, its bottom has a flanging hole, and it adopts the above-mentioned lithium zinc and zinc battery shell stretching and punching flanging hole technology to process.
The stretching and annealing treatment is carried out for three times to optimize the stretching processing technology of the battery shell, the hardness of the battery shell is strictly controlled, the stretching coefficient is increased by 0.2 compared with that of the traditional stretching technology, so that the battery shell is uniformly stretched, the wrinkling phenomenon is avoided, the stretching and forming precision is high, and the packaging requirement of the battery shell is met; on the other hand, the punching process of the flanging hole is finished under the condition that the small-size battery shell is not wrinkled by performing cold extrusion stretching treatment and punching the flanging hole on the bottom of the shell for two times; the cold extrusion extension station and the flanging hole punching station are arranged for simultaneous processing, pre-punching on the bottom of the battery shell is not needed, and the working efficiency is greatly improved; the flanging hole is ensured to have good precision by matching the first unloading mechanism with the flanging punch, the second unloading mechanism with the perforating punch, and the damage is avoided without influencing the stretching forming effect; in addition, the processing speed of the process is strictly controlled, the process of fully drawing and punching the flanging hole on the shell blank is ensured, and the purposes of high quality and high performance are achieved.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner. Those skilled in the art can make many possible variations and modifications to the invention using the above disclosed technical means and teachings, or can modify equivalent embodiments with equivalent variations, without departing from the scope of the invention. Therefore, all equivalent changes made according to the shape, structure and principle of the present invention should be covered by the protection scope of the present invention without departing from the contents of the technical scheme of the present invention.
Claims (5)
1. A kind of lithium zinc cell shell stretching and punching flanging hole technology, its characteristic lies in, it includes the following steps:
step one, performing first annealing treatment on a shell blank after the first stretching treatment is completed;
step two, after the shell blank subjected to the step one is subjected to secondary stretching treatment, carrying out secondary annealing treatment;
step three, after the third stretching treatment is carried out on the shell blank subjected to the step two, carrying out third annealing treatment to obtain a stretched and formed shell blank;
step four, performing primary cold extrusion stretching treatment on the bottom of the shell blank subjected to the step three;
step five, performing secondary cold extrusion stretching treatment on the bottom of the shell blank subjected to the step four to obtain a battery shell with a pre-flanged bottom;
sixthly, punching flanging holes in the bottom of the battery shell after the fifth step to obtain the battery shell with the flanging holes in the bottom;
wherein the annealing temperature of the first annealing treatment, the second annealing treatment and the third annealing treatment is 1050-;
the fourth step and the fifth step are operated at a cold extrusion extension station, the cold extrusion extension station comprises a first fixed female die, a first unloading mechanism and a flanging punch, the first unloading mechanism and the flanging punch are correspondingly arranged above and below the first fixed female die, and the punching end of the flanging punch is a flat punch;
the first fixing female die comprises a fixing section for fixing the shell blank and a punching section for the flanging punch to penetrate through, the inner diameter of the fixing section is gradually reduced from top to bottom, the first discharging mechanism comprises an inner fixing piece for fixing the inner wall of the shell blank and a discharging punch penetrating through the inner fixing piece, and the discharging punch is arranged corresponding to the flanging punch;
sixthly, operating a flanging hole punching station; the flanging hole punching station comprises a second fixed female die, and a second discharging mechanism and a perforating punch which are correspondingly arranged above and below the second fixed female die; the structure of the second fixed female die is the same as that of the first fixed female die, the structure of the second discharging mechanism is the same as that of the first discharging mechanism, and the punching end of the punching punch is a conical punch.
2. The process for drawing and punching a burring hole in a zinc oxide battery casing as defined in claim 1, wherein the first drawing treatment, the second drawing treatment and the third drawing treatment have a drawing coefficient of 0.7 to 0.9.
3. The process for drawing and punching flanging hole in zinc salt battery shell according to claim 2, wherein the shell blank of the first step is placed on a conveyer belt, the speed of the conveyer belt is 20-30 min/cm.
4. A kind of lithium zinc and zinc battery shell's flanging hole stamping device, characterized by that, it includes the cold extrusion that sets up in order according to the processing sequence of the battery shell stretches the station and punches the flanging hole station;
the cold extrusion stretching station comprises a first fixed female die, a first discharging mechanism and a flanging punch, wherein the first discharging mechanism and the flanging punch are correspondingly arranged above and below the first fixed female die;
the flanging hole punching station comprises a second fixed female die, and a second discharging mechanism and a perforating punch which are correspondingly arranged above and below the second fixed female die;
a first elastic buffer element is arranged corresponding to the first unloading mechanism and the second unloading mechanism, and a second elastic buffer element is arranged corresponding to the flanging punch and the perforating punch;
the first fixing female die comprises a fixing section for fixing the shell blank and a punching section for the flanging punch to penetrate through, the inner diameter of the fixing section is gradually reduced from top to bottom, the first discharging mechanism comprises an inner fixing piece for fixing the inner wall of the shell blank and a discharging punch penetrating through the inner fixing piece, the discharging punch is arranged corresponding to the flanging punch, the punching end of the flanging punch is a flat punch, and the inclination of the inner wall surface of the fixing section is 15 degrees;
the structure of the second fixed female die is the same as that of the first fixed female die, the structure of the second discharging mechanism is the same as that of the first discharging mechanism, and the punching end of the punching punch is a conical punch.
5. A kind of lithium zinc battery shell, characterized in that, its bottom has a flanging hole, and it adopts such as claim 1 of the lithium zinc battery shell drawing and punching flanging hole technology to process.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911276130.7A CN110935789B (en) | 2019-12-12 | 2019-12-12 | Process for stretching and punching flanging hole on lithium zinc battery shell and punching device thereof |
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| CN201911276130.7A CN110935789B (en) | 2019-12-12 | 2019-12-12 | Process for stretching and punching flanging hole on lithium zinc battery shell and punching device thereof |
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| CN110935789A CN110935789A (en) | 2020-03-31 |
| CN110935789B true CN110935789B (en) | 2021-12-24 |
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