Tank manufacturing method and manufacturing system

Abstract

The present invention addresses the problem of providing a method and a system for manufacturing cans that are inexpensive and can be supplied at a short delivery time. Provided is a method for manufacturing a can, which uses deep drawing by a press, and which is characterized by being provided with a pre-step press, a post-step press, and a conveyance means for conveying a blank from the pre-step press to the post-step press, the method comprising: a first pressing step for pressing the blank from the pre-step press to the post-step press, and a second pressing step for pressing the blank from the post-step press to the post-step press; performing blanking processing on the metal plate and impressing processing for reducing the plate thickness of the blank by using the punching machine in the previous process; a conveyance step in which the blank is conveyed from the previous step press to the subsequent step press; and a second punching step of performing drawing processing and / or drawing thinning processing by using a post-step punching machine to form the square can.

Description

Technical Field

[0001] The present invention relates to a method for manufacturing a can by deep drawing and a manufacturing system for deep drawing a can. Background Art

[0002] Conventionally, in deep drawing of cans, a single press machine is generally used to perform multiple processes such as blanking to punch a blank from a metal plate and drawing to form a bottomed cylindrical cup (see Patent Documents 1 and 2).

[0003] Furthermore, the single press machine is generally a dedicated single press machine corresponding to the type and size of the product.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2021-23942

[0007] Patent Document 2: Japanese Patent Application Publication No. 2003-275833 Summary of the invention

[0008] Problems to be solved by the invention

[0009] As a press machine, there are many types of machines corresponding to the types and sizes of cans, and based on these models, a dedicated press machine is designed and manufactured in accordance with the construction methods of can manufacturers, but it is not always possible to set the specifications in detail in accordance with the construction methods of can manufacturers, so sometimes the specifications are exceeded. In addition, since it is a dedicated press machine, it is difficult to transfer it to the manufacture of other products, which becomes a major factor in the high cost of can manufacturing.

[0010] In addition, it takes a considerable amount of time to design and manufacture a dedicated press machine, so there is also the disadvantage of a longer delivery time.

[0011] Therefore, an object of the present invention is to provide a method and system for manufacturing a can that is inexpensive and can be supplied in a short delivery period.

[0012] Solutions for solving problems

[0013] The method for manufacturing a can by deep drawing using a press machine of the present invention is characterized in that:

[0014] The method for manufacturing a can is equipped with a front-process punch, a back-process punch and a conveying unit for conveying the blank from the front-process punch to the back-process punch, and the method comprises: a first stamping process, in which the front-process punch is used to perform blanking processing on the metal plate and embossing processing to reduce the plate thickness of the blank; a conveying process, in which the blank is conveyed from the front-process punch to the back-process punch; and a second stamping process, in which the back-process punch is used to perform deep drawing and / or deep thinning processing to form a square can.

[0015] Furthermore, the can manufacturing system using deep drawing of a press machine of the present invention is characterized in that:

[0016] It is equipped with a front-process punching machine, a back-process punching machine and a conveying unit for conveying the blank from the front-process punching machine to the back-process punching machine. The front-process punching machine is used to perform blanking processing on the metal plate and stamping processing to reduce the plate thickness of the blank, and the back-process punching machine is used to perform deep drawing and / or deep drawing and thinning processing to form a square can.

[0017] Effects of the Invention

[0018] The present invention, through the above-mentioned structure, can construct a manufacturing system that is most suitable for the product to be processed, its size, and its processing steps, and can also be provided at a low cost and designed and manufactured in a short time.

[0019] In addition, by using a general-purpose press machine, it is relatively easy to cope with changes in the type and size of products to be processed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a diagram showing a molding process of the unit case according to the present embodiment.

[0021] Figure 2 It is a side explanatory diagram of the manufacturing system 1 of this embodiment.

[0022] Figure 3 It is a plan view for explaining the manufacturing system 1 according to the present embodiment. DETAILED DESCRIPTION

[0023] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, the same reference numerals in different drawings represent parts with the same functions, and repeated descriptions in the drawings will be appropriately omitted.

[0024] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0025] [Implementation Method]

[0026] Hereinafter, embodiments of a method for manufacturing a can by deep drawing using a press machine, for example, a rectangular can such as a cell case of a battery such as a lithium ion battery, and a manufacturing system used in the manufacturing method will be described with reference to the accompanying drawings.

[0027] An embodiment of the present invention (hereinafter referred to as "this embodiment") is a method and a system for manufacturing a cell case of a lithium ion battery having a rectangular opening.

[0028] [Manufacturing process]

[0029] Figure 1 It is a diagram showing a molding process of the unit case according to the present embodiment.

[0030] Reference Figure 1 The manufacturing process of the unit case in this embodiment will be described.

[0031] (1) The uncoiler is a device for unwinding the aluminum sheet S wound into a coil shape, and supplies the unwinding aluminum sheet S to the preceding process press machine 2 .

[0032] (2) The first punching process is performed in the pre-process punching machine 2. The first punching process is a process of performing a blanking process in the order of a blanking process and a coining process.

[0033] (3) The blanking process is a process of punching out a flat blank B such as an oval shape or a compound R shape for manufacturing a can by deep drawing from the aluminum sheet S unwound from the uncoiler. After the blanking process, there is a process of clamping and conveying the blank B to the subsequent coining process.

[0034] (4) The stamping process is a process of flattening a portion of the blank B with a punch to reduce the thickness of the plate. In the present embodiment, the stamping process is performed on a portion that will become the bottom of the tank in the final shape and / or its vicinity to reduce the thickness of the plate. After the stamping process, there is a process of clamping and conveying the blank B to the blank conveying device 4.

[0035] (5) After blanking and coining are performed by the front-stage press machine 2 , there is a conveying step of conveying the blank B to the back-stage press machine 3 by the blank conveying device 4 in order to perform processing by the back-stage press machine 3 .

[0036] (6) The second pressing step is performed in the post-process press machine 3. The second pressing step is a step of processing the blank B into the final cup shape through a plurality of forming steps.

[0037] (7) The multiple forming steps include a first forming step of drawing the cup C into a flat shape such as an elliptical shape or a compound R shape, and a final forming step of drawing the cup C to the long and short side dimensions of the final product. After each forming step, there is a step of gripping and conveying the cup C to the subsequent forming step or the cup conveying device 5.

[0038] It should be noted that a necessary forming process step may be added between the first forming process step and the final forming process step. In addition, drawing or ironing may be appropriately selected in each forming process step.

[0039] (8) After another molding process is performed using the post-process press machine 3, there is a conveying process in which the cup C (square can) is conveyed to the post-pressing process by the cup conveying device 5.

[0040] (9) In the post-pressing process, as needed, there are a cleaning process for removing lubricating oil and foreign matter attached to the square can, an inspection process for visually inspecting the finished square can using a camera, etc., and a packaging process for packaging qualified products that pass the inspection.

[0041] The blanking process, coining process, and various molding processes in the above-mentioned processes are processes performed using a press machine.

[0042] The punch used in the blanking process and the embossing process among the processes performed by the punching machine can be a punch with a short stroke, but requires a high pressurizing capacity. In contrast, the punch used in the various forming processes such as drawing or deep ironing requires a long stroke, but can be a punch with a low pressurizing capacity.

[0043] Therefore, when using the same punch to perform the blanking processing step and the stamping processing step, a general-purpose punch with a short stroke and a high pressurizing capacity is selected as the front-process punch 2, and when using the same punch to perform each forming processing step, a general-purpose punch with a long stroke and a low pressurizing capacity is selected as the back-process punch 3.

[0044] The front-stage punching machine 2 is connected to the back-stage punching machine 3 via the blank conveying device 4, and a cup conveying device 5 for carrying out the cup C from the back-stage punching machine 3 is further combined. Figure 2 and Figure 3 As shown, a manufacturing system 1 is configured as a series.

[0045] [Manufacturing system]

[0046] Figure 2 is a side view of a manufacturing system 1 according to the present embodiment. Figure 3 This is a top view illustration.

[0047] use Figure 2 and Figure 3 A manufacturing system 1 including a preceding process press machine 2, a following process press machine 3, a blank conveying device 4, and a cup conveying device 5 according to the present embodiment will be described.

[0048] The front-stage press machine 2 and the rear-stage press machine 3 are so-called general-purpose press machines, but the front-stage press machine is selected from general-purpose press machines having two processing tables, and the rear-stage press machine is selected from general-purpose press machines having a plurality of processing tables.

[0049] The front-end process press machine 2 includes a blanking process table 21 a and an coining process table 21 b arranged in a row as the front-end process table 21 .

[0050] The front process processing station 21 has a punch 221 and a die 231, and the blanking processing station 21a and the coining processing station 21b are respectively provided with a punch 221 and a die 231 facing each other. The two punches 221 are held in a punch holder provided with a slide 22 and arranged in a row at a predetermined interval, and the two dies 231 are held in a die holder provided on a backing plate 23 and arranged in a row at a predetermined interval.

[0051] In addition, the front process punching machine 2 has a conveying device 24 for conveying the blank B. The conveying device 24 is configured to convey the blank B from the blanking processing station 21a and the stamping processing station 21b to the subsequent stamping processing station 21b and the blank conveying device 4, respectively, and whenever the punch 221 is raised or lowered, the blank B is moved to the subsequent stamping processing station 21b and the blank conveying device 4.

[0052] The post-process press machine 3 includes a receiving table 31a, a first molding table 31b, and a final molding table 31c arranged in a row as post-process tables 31. It should be noted that a necessary molding table may be added between the first molding table 31b and the final molding table 31c.

[0053] The first molding station 31b and the final molding station 31c in the post-processing station 31 are respectively provided with mutually opposing punches 321 and dies 331. The three punches 321 are held in a punch holder provided with a slide 32 and arranged in a row at a predetermined interval, and the three dies are held in a die holder provided on a backing plate 33 and arranged in a row at a predetermined interval.

[0054] The receiving table 31 a is provided with a terminal portion of the blank conveying device 4 by removing the structure of the first processing table originally provided in the general-purpose press machine.

[0055] In addition, the post-process punching machine 3 has a conveying device 34 for conveying the blank B and the cup C. The conveying device 34 is configured to convey the blank B and the cup C from the receiving station 31a, the first molding station 31b, and the final molding station 31c to the subsequent first molding station 31b, the final molding station 31c, and the cup conveying device 5, respectively, and whenever the punch 321 is raised or lowered, the blank B and the cup C are moved to the subsequent first molding station 31b, the final molding station 31c, and the cup conveying device 5.

[0056] [Transmission device]

[0057] like Figure 3 As shown, as a transfer device 24 provided in the front process punching machine 2, a pair of clamping fingers 241 are respectively arranged opposite to each other on the blanking processing station 21a and the stamping processing station 21b. The two pairs of clamping fingers 241 are integrally connected and driven synchronously with the lifting and lowering of the punch 221. The pair of clamping fingers 241 grasps the blank B and moves the blank B to the subsequent stamping processing station 21b and the blank conveying device 4.

[0058] In addition, as a transfer device 34 provided in the post-process punching machine 3, a pair of gripping fingers 341 are disposed opposite to each other at the receiving station 31a, the first molding station 31b, and the final molding station 31c. These multiple pairs of gripping fingers 341 are integrally connected and driven synchronously with the lifting and lowering of the punch 321. The pair of gripping fingers 341 grip the blank B and the cup C, and move the blank B and the cup C to the subsequent first molding station 31b, the final molding station 31c, and the cup conveying device 5.

[0059] The clamping fingers 241 and 341 hold the flat blank B and cup C so as to sandwich the flat blank B and cup C from both sides in the longitudinal direction. This can shorten the conveying pitch and suppress deformation of the cup C due to the clamping force.

[0060] The contact parts 2411 and 3411 of the clamping fingers 241 and 341 that come into contact with the blank B and the cup C are made of a material that is not easy to damage the aluminum blank B and the cup C, such as a resin material, a rubber material, etc. The blank B and the cup C become hot due to the stamping process, so the contact parts 2411 and 3411 need to have a predetermined heat resistance. In addition, since the blank B and the cup C are clamped and released repeatedly, durability such as wear resistance is also required. Considering this point, it is appropriately selected from polyamide-imide, polyacetal, monomer cast nylon, fluororesin, polyetheretherketone, fluororubber, silicone rubber, ethylene propylene rubber, acrylic rubber, etc. In addition, as for the heat-resistant temperature, it is preferably 100°C or more, and more preferably 150°C or more.

[0061] [Modifications]

[0062] In the above, the manufacturing system 1 according to the present embodiment has been described, but the present invention is not limited to this example, and various modifications are conceivable.

[0063] (1) The manufacturing system 1 of this embodiment is composed of two general-purpose punching machines, namely, the front-process punching machine 2 and the back-process punching machine 3, but is not limited thereto and may be composed of three or more general-purpose punching machines. In this case, each general-purpose punching machine selects the most suitable punching machine from punching machines with different pressurization capacity, stroke, number of processing stations, etc.

[0064] Furthermore, even if the pressurizing capacity and stroke required for each processing step are of the same degree, when the number of processing stations is large, a manufacturing system can be constructed by connecting a plurality of general-purpose press machines instead of using a single dedicated press machine.

[0065] (2) In the manufacturing system 1 of the present embodiment, the front-stage press machine 2 having a high pressurizing capacity and a short stroke and the back-stage press machine 3 having a low pressurizing capacity and a long stroke are combined, but any combination other than this combination may be used.

[0066] (3) In the manufacturing system 1 of the present embodiment, the front-end punch 2 is used to perform blanking processing and embossing processing, and the back-end punch 3 is used to perform multiple forming processes. However, the order in which each punch performs what kind of processing can be appropriately designed according to the type, shape, size, etc. of the product to be manufactured and the specific forming processing technology.

[0067] For example, the front-stage press machine 2 need not include the coining table 21 b , and the blanking table 21 a may only perform blanking on the blank, or perform drawing by blanking the blank and punching.

[0068] In addition, the post-process punching machine 3 may be provided with a necessary number of forming processing tables in the middle in addition to the first forming processing table 31b and the final forming processing table 31c for deep drawing. In addition, other processing tables required such as a finishing process, a step processing process, and a lubricating oil coating process may be added at any position.

[0069] (4) The manufacturing system 1 of this embodiment processes the unit case of the lithium-ion battery made of aluminum, but is not limited to processing the unit case, and can also process any other type of aluminum cans. In addition, it is also possible to process any type of case and can made of other metals such as stainless steel, and it is also possible to process any type of case and can with a laminated structure in which metal is coated with resin or the like.

[0070] (5) The manufacturing system 1 of this embodiment manufactures cans with rectangular openings. Alternatively, cans with square openings may be manufactured. Also, the manufacturing system is not limited to manufacturing quadrilateral cans, and cans of other shapes such as circular cans and oval cans may be manufactured.

[0071] [Other embodiments of the invention]

[0072] (1) A method for manufacturing a can, the method utilizing deep drawing by a press machine, characterized in that:

[0073] The invention is provided with a front-stage punching machine, a rear-stage punching machine, and a conveying unit for conveying a blank from the front-stage punching machine to the rear-stage punching machine.

[0074] The method for manufacturing the can comprises: a first stamping process, in which the metal plate is blanked and embossed to reduce the thickness of the blank by using the stamping machine of the previous process;

[0075] A conveying step of conveying the blank from the preceding step punching machine to the succeeding step punching machine; and

[0076] In the second stamping process, the post-process stamping machine is used to perform deep drawing and / or deep ironing to form the square can.

[0077] (2) The method for manufacturing a tank according to (1) above, characterized in that:

[0078] The stroke of the preceding-step punching machine is shorter than the stroke of the succeeding-step punching machine.

[0079] (3) The can manufacturing method according to (1) or (2) above, wherein the pressurizing capacity of the preceding step press machine is higher than the pressurizing capacity of the succeeding step press machine.

[0080] (4) The method for manufacturing a can according to any one of (1) to (3) above, characterized in that:

[0081] The preceding process punching machine includes a clamping finger for conveying the blank formed by the blanking process.

[0082] In the first punching step, the blanking process is performed before the coining process, and the first punching step includes a step of gripping and conveying the blank formed by the blanking process in the pre-process punching machine.

[0083] (5) The method for manufacturing a can according to any one of (1) to (4) above, characterized in that:

[0084] The post-process punching machine has gripping fingers for conveying a molded product formed by drawing and / or ironing the blank.

[0085] The clamping finger includes a contact portion made of a resin material or a rubber material, and the molded product is gripped and conveyed by the contact portion.

[0086] (6) The method for manufacturing a can according to any one of (1) to (5) above, characterized in that:

[0087] The can is an aluminum can.

[0088] (7) A can manufacturing system utilizing deep drawing processing by a press machine, characterized in that:

[0089] The invention is provided with a front-stage punching machine, a rear-stage punching machine, and a conveying unit for conveying a blank from the front-stage punching machine to the rear-stage punching machine.

[0090] The front-end punching machine is used to perform blanking processing on the metal plate and coining processing to reduce the thickness of the blank.

[0091] The post-process punching machine is configured to perform drawing and / or ironing to form the square can.

[0092] (8) The can manufacturing system according to (7) above, characterized in that:

[0093] The stroke of the preceding-step punching machine is shorter than the stroke of the succeeding-step punching machine.

[0094] (9) The can manufacturing system according to (7) or (8) above, wherein the pressurizing capacity of the preceding step press machine is higher than the pressurizing capacity of the succeeding step press machine.

[0095] (10) The can manufacturing system according to any one of (7) to (9) above, characterized in that:

[0096] The preceding process press machine is configured to perform the blanking process before the coining process, and the preceding process press machine includes gripping fingers for conveying the blank formed by the blanking process within the preceding process press machine.

[0097] (11) The can manufacturing system according to any one of (7) to (10) above, characterized in that:

[0098] The post-process punching machine has gripping fingers for conveying a molded product formed by drawing and / or ironing the blank.

[0099] The contact portion of the clamping fingers with the molded product is made of a resin material or a rubber material.

[0100] (12) The can manufacturing system according to any one of (7) to (11) above, characterized in that:

[0101] The can is an aluminum can.

[0102] Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and design changes and the like within the scope not departing from the gist of the present invention are also included in the present invention.

[0103] Furthermore, the above-mentioned embodiments may be combined by using the mutual techniques as long as there are no particular contradictions or problems in their purposes, structures, etc.

[0104] Description of Reference Numerals

[0105] 1: Manufacturing system;

[0106] 2: Pre-process punching machine;

[0107] 21: Pre-processing table;

[0108] 21a: blanking processing table;

[0109] 21b: embossing table;

[0110] 22: sliding part;

[0111] 221: Punch;

[0112] 23: Pad;

[0113] 231: die head;

[0114] 24: Transmission device;

[0115] 241: Clamping finger;

[0116] 2411: Contact Department;

[0117] 3: Post-process punching machine;

[0118] 31: Post-processing table;

[0119] 31a: receiving station;

[0120] 31b: first molding processing station;

[0121] 31c: Final forming processing station;

[0122] 32: sliding part;

[0123] 321: Punch;

[0124] 33: pad;

[0125] 331: die head;

[0126] 34: Transmission device;

[0127] 341: Clamping finger;

[0128] 3411: Contact Department;

[0129] 4: Blank conveying device;

[0130] 5: Cup conveying device;

[0131] B: blank;

[0132] C: cup;

[0133] S: Aluminum sheet.

Claims

1. A method for manufacturing a can, the method utilizing deep drawing by a punching machine, characterized in that: The invention is provided with a front-stage punching machine, a rear-stage punching machine, and a conveying unit for conveying a blank from the front-stage punching machine to the rear-stage punching machine. The method for manufacturing the can comprises: a first stamping process, in which the metal plate is blanked and embossed to reduce the thickness of the blank by using the stamping machine of the previous process; A conveying step of conveying the blank from the preceding step punching machine to the succeeding step punching machine; and In the second stamping process, the post-process stamping machine is used to perform deep drawing and / or deep ironing to form the square can.

2. The method for manufacturing a tank according to claim 1, characterized in that: The stroke of the preceding-step punching machine is shorter than the stroke of the succeeding-step punching machine.

3. The method for manufacturing a tank according to claim 1, characterized in that: The pressurizing capacity of the preceding step press machine is higher than the pressurizing capacity of the succeeding step press machine.

4. The method for manufacturing a can according to any one of claims 1 to 3, characterized in that: The preceding process punching machine includes a clamping finger for conveying the blank formed by the blanking process. In the first punching step, the blanking process is performed before the coining process, and the first punching step includes a step of gripping and conveying the blank formed by the blanking process in the pre-process punching machine.

5. The method for manufacturing a can according to any one of claims 1 to 3, characterized in that: The post-process punching machine has gripping fingers for conveying a molded product formed by drawing and / or ironing the blank. The clamping finger includes a contact portion made of a resin material or a rubber material, and the molded product is gripped and conveyed by the contact portion.

6. The method for manufacturing a can according to any one of claims 1 to 3, characterized in that: The can is an aluminum can.

7. A can manufacturing system, the can manufacturing system utilizing deep drawing processing by a punching machine, characterized in that: The invention is provided with a front-stage punching machine, a rear-stage punching machine, and a conveying unit for conveying a blank from the front-stage punching machine to the rear-stage punching machine. The front-end punching machine is used to perform blanking processing on the metal plate and coining processing to reduce the thickness of the blank. The post-process punching machine is configured to perform drawing and / or ironing to form the square can.

8. The can manufacturing system according to claim 7, characterized in that: The stroke of the preceding-step punching machine is shorter than the stroke of the succeeding-step punching machine.

9. The can manufacturing system according to claim 7, characterized in that: The pressurizing capacity of the preceding step press machine is higher than the pressurizing capacity of the succeeding step press machine.

10. The can manufacturing system according to any one of claims 7 to 9, characterized in that: The preceding process press machine is configured to perform the blanking process before the coining process, and the preceding process press machine includes gripping fingers for conveying the blank formed by the blanking process within the preceding process press machine.

11. The can manufacturing system according to any one of claims 7 to 9, characterized in that: The post-process punching machine has gripping fingers for conveying a molded product formed by drawing and / or ironing the blank. The contact portion of the clamping fingers with the molded product is made of a resin material or a rubber material.

12. The can manufacturing system according to any one of claims 7 to 9, characterized in that: The can is an aluminum can.

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