Beading part forming apparatus of can

Abstract

The present invention relates to a beading part forming apparatus of a can, which forms a beading part on a can. The apparatus comprises: a suction unit comprising a circular body and a cylindrical rotary part rotatably coupled to the circular body; a beading part forming unit comprising a shaft connected to the cylindrical rotary part through a connection bar, an insertion member provided at the lower portion of the shaft and inserted into an opening of a can, a rotary part rotatably coupled to the shaft, and a bead knife coupled to the rotary part and pressing the circumferential surface of the can to form a beading part; a first measuring unit for measuring a displacement of the rotary part with respect to the rotational direction thereof; and an inspection unit for comparing the measured value measured by the first measuring unit with a previously inputted input value to determine that it is normal when located within a set range and determine that it is defective when located outside the set range.

Description

Can beading section forming device

[0001] Cross-citation with related applications

[0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2024-0188420 filed on December 17, 2024, and all contents disclosed in the document of said Korean Patent Application are incorporated herein as part of this specification.

[0003] Technology field

[0004] The present invention relates to a device for forming a beading portion of a can for forming a beading portion of a can included in a secondary battery. In particular, the present invention relates to a device for forming a beading portion of a can that can accurately detect whether there is an abnormality in the bead knife used to form the beading portion of the can, and thereby minimize the occurrence of defects.

[0005] Generally, a secondary battery refers to a battery that can be charged and discharged, unlike a primary battery which cannot be recharged. Such secondary batteries are widely used in the field of high-tech electronic devices, such as phones, laptop computers, and camcorders.

[0006] The above-mentioned secondary batteries are classified according to the shape of the battery case into cylindrical secondary batteries and prismatic secondary batteries in which the electrode assembly is embedded in a cylindrical or prismatic metal can, and pouch-type secondary batteries in which the electrode assembly is embedded in a pouch-type case made of an aluminum laminate sheet.

[0007] Meanwhile, the cylindrical secondary battery comprises a jelly-roll type electrode assembly, a can that accommodates the electrode assembly, and a cap assembly mounted in the opening of the can. The can comprises a receiving portion that accommodates the electrode assembly, a beading portion that supports the cap assembly, and a clipping portion that secures the cap assembly. Here, the beading portion supports the cap assembly that is inserted into the interior of the can while being molded to protrude into the interior of the can.

[0008] A method for manufacturing a cylindrical secondary battery having such a structure involves inserting an electrode assembly into a cylindrical can, forming a beading portion (ring-shaped groove) on the top of the can, and then positioning a cap assembly equipped with a gasket so as to be supported by the beading portion. Next, the top of the can is clamped to secure the cap assembly. This allows for the manufacture of a finished secondary battery.

[0009] Here, the can includes a beading molding process for forming a beading portion. The beading molding process is performed by applying pressure to the main surface of a cylindrical can through a bead knife.

[0010] However, conventional beading molding processes had a problem where product defects occurred if the bead knife wore out beyond a set range or broke.

[0011] To address these issues, conventional methods have involved replacing the bead knife after a set time has elapsed; however, since the exact time of defect occurrence could not be accurately identified, there were limitations in reducing the defect rate.

[0012] The present invention aims to provide a beading portion forming device for a can that can more accurately identify the point at which a product defect occurs by detecting abnormalities in the bead knife through vibrations and positional displacements generated during the rotation of the bead knife, thereby minimizing the defect rate occurring during the forming of the beading portion of the can.

[0013] The present invention relates to a beading portion forming device for a can, comprising: a suction unit equipped with a circular body and a cylindrical rotary rotatably coupled to the circular body; a shaft connected to the cylindrical rotary via a connecting bar, an insertion member provided at the lower part of the shaft into which the opening of the can is inserted, and a rotary rotary rotatably coupled to the shaft; a beading portion forming unit comprising a bead knife coupled to the rotary rotary and forming a beading portion by pressing the main surface of the can; a first measuring unit for measuring displacement with respect to the rotational direction of the rotary rotary; and an inspection unit that compares a measured value measured by the first measuring unit with a pre-entered input value and determines it as normal if it is located within a set range, and determines it as defective if it is located outside of it.

[0014] The first measuring unit above may be a displacement sensor.

[0015] The above rotary includes a measuring unit, and the first measuring unit can irradiate a laser toward the measuring unit.

[0016] The above measuring unit may include a coupling piece that is coupled to the rotary and rotates together with the rotary, and a measuring piece having a vertical surface into which the laser of the first measuring unit is irradiated.

[0017] The above measuring part may be the outer surface of the above rotary.

[0018] It may further include a second measuring unit for measuring positional displacement with respect to the rotation axis direction of the above-mentioned rotary.

[0019] The second measuring unit above may be a displacement sensor.

[0020] The above measuring piece may have a horizontal plane that reflects the laser irradiated from the second measuring unit.

[0021] The above inspection unit can determine that it is normal if it is located within a set range when comparing the measurement value measured by the second measurement unit with a pre-entered input value, and determine that it is defective if it is located outside of it.

[0022] It may further include a vibration sensor that detects vibrations occurring in the bead knife.

[0023] The above inspection unit can determine that it is normal if the vibration value measured by the vibration sensor is within a set range and that it is defective if it is outside of it, by comparing the vibration value with a pre-entered input value.

[0024] The beading portion forming device of the present invention includes first and second measuring units for detecting the positional displacement of a rotary rotary connected to a bead knife, wherein the first and second measuring units are formed as displacement sensors so as to be able to confirm the positional displacement of the bead knife connected to the rotary rotary, and accordingly, accurately detect whether there is an abnormality in the bead knife, and as a result, accurately determine the time for replacing the bead knife and significantly reduce the product defect rate.

[0025] FIG. 1 is a cross-sectional view illustrating a secondary battery of the present invention.

[0026] FIG. 2 is a perspective view illustrating a beading portion forming device for a can according to a first embodiment of the present invention.

[0027] FIG. 3 is a perspective view roughly illustrating a beading portion forming device of a can according to a first embodiment of the present invention.

[0028] Fig. 4 is an enlarged view of section A shown in Fig. 2.

[0029] FIG. 5 is a design drawing illustrating a beading portion forming unit included in a beading portion forming device of a can according to a first embodiment of the present invention.

[0030] Fig. 6 is an enlarged view of section B shown in Fig. 5.

[0031] FIG. 7 is a design drawing illustrating a vibration sensor included in a beading portion forming device of a can according to a first embodiment of the present invention.

[0032] FIG. 8 is a design drawing illustrating a beading portion forming unit included in a beading portion forming device of a can according to a second embodiment of the present invention.

[0033] Hereinafter, embodiments of the present invention are described in detail with reference to the attached drawings so that those skilled in the art can easily implement the invention. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein. Furthermore, in order to clearly explain the present invention in the drawings, parts unrelated to the explanation have been omitted, and similar parts throughout the specification are denoted by similar reference numerals.

[0034] [Secondary battery of the present invention]

[0035] FIG. 1 is a cross-sectional view illustrating a secondary battery of the present invention.

[0036] As shown in FIG. 1, the secondary battery (1) of the present invention includes an electrode assembly (11), a can (12) that accommodates the electrode assembly (11), and a cap assembly (13) that is mounted in the opening of the can (12).

[0037] The can (12) comprises a receiving portion (121) having a receiving space for receiving an electrode assembly (11), a clamping portion (123) for fixing a cap assembly, and a beading portion (122) provided between the receiving portion (121) and the clamping portion (123) and supporting the cap assembly.

[0038] Here, the beading portion (122) is formed to protrude into the interior of the can (12) and is formed through the beading portion forming device (2) of the can according to the first embodiment of the present invention.

[0039] In particular, the beading portion forming device (2) of a can according to the first embodiment of the present invention is characterized by including a displacement sensor and a vibration sensor. Due to this characteristic, it is possible to accurately detect whether there is an abnormality in the bead knife (224) that forms the beading portion (122) of the can (12), and accordingly, the replacement time of the bead knife (224) can be accurately predicted, and as a result, the defect rate caused by the bead knife can be significantly reduced.

[0040] Hereinafter, a beading portion forming device (2) of a can according to the first embodiment of the present invention will be described in detail with reference to the attached drawings.

[0041] [Bidding part forming device for a can according to the first embodiment of the present invention]

[0042] FIG. 2 is a perspective view illustrating a beading portion forming device for a can according to a first embodiment of the present invention, FIG. 3 is a perspective view illustrating a beading portion forming device for a can according to a first embodiment of the present invention, FIG. 4 is an enlarged view of part A shown in FIG. 2, FIG. 5 is a design drawing illustrating a beading portion forming unit included in the beading portion forming device for a can according to a first embodiment of the present invention, FIG. 6 is an enlarged view of part B shown in FIG. 5, and FIG. 7 is a design drawing illustrating a vibration sensor (26) included in the beading portion forming device for a can according to a first embodiment of the present invention.

[0043] The beading portion forming device (2) of a can according to the first embodiment of the present invention is for forming a beading portion on a can, as shown in FIGS. 2 and FIGS. 3.

[0044] In particular, the beading portion forming device (2) of a can according to the first embodiment of the present invention has a structure that can accurately detect whether there is an abnormality in the bead knife (224) that forms the beading portion (122) on the can (12), and accordingly, the replacement cycle of the bead knife (224) can be accurately predicted, and as a result, the occurrence of defects can be minimized.

[0045] That is, the beading part forming device (2) of a can according to the first embodiment of the present invention includes a suction unit (21), a beading part forming unit (22), a first measuring unit (23), and an inspection unit (24).

[0046] suction unit

[0047] The suction unit (21) is for sucking up and removing foreign substances generated during the molding of the beading part of the can.

[0048] That is, the suction unit (21) is installed on the ground and includes a circular body (211) having a cylindrical shape and a cylindrical rotary (212) rotatably coupled to the circular body (211).

[0049] Here, the suction unit (21) has a plurality of suction parts combined with the cylindrical rotary (212) to suck up foreign substances.

[0050] beading section forming unit

[0051] A plurality of the above-mentioned beading molding units (22) are installed at set intervals along the outer surface of the above-mentioned cylindrical rotary (212).

[0052] That is, the beading portion forming unit (22) comprises a shaft (221) connected to the cylindrical rotary (212) via a connecting bar (2211), an insertion member (222) provided at the lower part of the shaft (221) into which the opening of the can is inserted, a rotary (223) rotatably coupled to the shaft (221); and a bead knife (224) coupled to the rotary (223) and forming the beading portion (122) by pressing the main surface of the can.

[0053] Referring to FIG. 3, the beading portion forming unit (22) having such a structure presses the circumference of the can (12) inserted into the insert member (222) while the bead knife (224) rotates the main surface of the shaft (221) by the rotary (223). Then, the beading portion (122) is formed as a part of the can (12) pressed by the bead knife (224) protrudes inward.

[0054] Meanwhile, if the beading part molding unit (22) is used continuously, a change in position may occur, and as a result, the bead knife may not be able to uniformly press the main surface of the can (12), and a defect may occur.

[0055] In particular, if the bead knife (224) wears out beyond the set range, vibration occurs during the rotation of the bead knife, and a positional error may occur in the beading part forming unit (22), and as a result, the bead knife may not be able to uniformly press the main surface of the can (12), and a defect may occur.

[0056] To solve such problems, the beading portion forming device (2) of a can according to the first embodiment of the present invention includes a first measuring unit (23) and an inspection unit (24) that detect positional displacement or movement displacement of the beading portion forming unit (22).

[0057] 1st measuring unit

[0058] The first measuring unit (23) is for measuring displacement with respect to the rotational direction of the beading forming unit (horizontal direction of the beading forming unit as seen in FIG. 3).

[0059] That is, the first measuring unit (23) is installed in a position horizontal to the outer surface of the rotary (223) included in the beading molding unit (22), and measures the displacement of the beading molding unit by irradiating a laser toward the rotary (223) and detecting the reflected laser. In other words, the first measuring unit (23) determines that it is defective if the range of movement of the rotary (223) exceeds a set range.

[0060] Here, the first measuring unit (23) may be provided as a displacement sensor. Meanwhile, the displacement sensor is a sensor that measures the distance or position of an object moved, and since it is widely used in industrial settings, a detailed description is omitted.

[0061] Inspection unit

[0062] The inspection unit (24) is intended to determine whether there is an abnormality in the beading part forming unit (22) based on the measurement value measured by the first measurement unit (23).

[0063] That is, the inspection unit (24) compares the measurement value measured by the first measurement unit (23) with a pre-entered input value and determines it to be normal if it is located within a set range, and determines it to be defective if it is located outside the set range.

[0064] Meanwhile, if it is determined to be defective, the position of the beading part forming unit (22) can be adjusted so that the measurement value measured by the first measuring unit (23) is located within the pre-entered input value, or the bead knife (224) can be inspected for defects and replaced.

[0065] Accordingly, the beading portion forming device (2) of a can according to the first embodiment of the present invention includes a first measuring unit (23) and an inspection unit (24), thereby accurately detecting the displacement of the beading portion forming unit (22), and accordingly accurately determining whether it is normal or defective, and as a result, the occurrence of product defects caused by the bead knife (224) can be minimized.

[0066] Meanwhile, the first measuring unit (23) includes a measuring part (225) for effectively reflecting a laser irradiated from the beading part forming unit (22). That is, the measuring part (225) has a structure provided on the rotary (223) and reflecting a laser irradiated from the first measuring unit (23).

[0067] For example, the measuring unit (225) includes a coupling piece (2251) that is coupled to the rotary (223) and rotates together with the rotary (223), and a measuring piece (2252) having a vertical surface (2253) that reflects the laser of the first measuring unit (23). Accordingly, the first measuring unit (23) can more accurately measure the displacement of the rotary (223) through the measuring unit (225).

[0068] Meanwhile, the above-mentioned connecting piece (2251) can be detachably connected to the above-mentioned rotary (223).

[0069] Meanwhile, the measuring piece (2252) can be angle-adjustablely coupled to the coupling piece (2251) in the rotational direction of the rotary (223), and can be detachably coupled to the coupling piece (2251).

[0070] The vertical surface (2253) may be formed on the surface of the measuring part (225) facing the second measuring unit (25).

[0071] Meanwhile, the beading portion forming device (2) of a can according to the first embodiment of the present invention may further include a second measuring unit (25) for measuring the displacement in the rotational axis direction (up and down direction of the beading portion forming unit (22) as seen in FIG. 3).

[0072] 2nd measuring unit

[0073] The second measuring unit (25) is for measuring the displacement in the direction of the rotation axis of the beading part forming unit (22), and through this, the displacement with respect to the rotation axis of the beaded knife (224) can be measured.

[0074] To summarize, the first measuring unit (23) measures the displacement in the rotational direction (horizontal direction as seen in FIG. 3) of the bead knife (224), and the second measuring unit (25) measures the displacement in the rotational axis direction (vertical direction as seen in FIG. 3) of the bead knife (224).

[0075] That is, the second measuring unit (25) is installed at the upper or lower part of the rotary (223) included in the beading molding unit (22), and detects a laser directed toward the rotary (223) to measure the displacement of the beading molding unit.

[0076] Here, the second measuring unit (25) can be provided with the same displacement sensor as the first measuring unit (23).

[0077] Meanwhile, the measuring unit (225) has a horizontal plane (2254) that reflects the laser irradiated from the second measuring unit (25), and accordingly, the second measuring unit (25) can more accurately measure the displacement of the beading unit forming unit (22).

[0078] Meanwhile, the inspection unit (24) can determine that the value measured by the second measurement unit (25) is normal if it is within a set range and is defective if it is outside of it.

[0079] Meanwhile, if it is determined to be defective, the position of the beading part forming unit (22) can be adjusted so that the measurement value measured by the second measuring unit (25) is located within the pre-entered input value, or the bead knife (224) can be inspected for defects and replaced.

[0080] Accordingly, the beading portion forming device (2) of a can according to the first embodiment of the present invention further includes a second measuring unit (25) so that the displacement of movement with respect to the rotation axis direction of the beading portion forming unit (22) can be accurately measured, and as a result, the defect rate during the forming of the beading portion of a can can be minimized.

[0081] Meanwhile, the beading part forming device (2) of a can according to the first embodiment of the present invention may further include a vibration sensor (26) that detects vibrations occurring in the bead knife (224).

[0082] Vibration sensor

[0083] The vibration sensor (26) is intended to detect vibrations occurring in the bead knife (224) and to check for abnormalities in the bead knife (224).

[0084] That is, the vibration sensor (26) is installed on the bead rotating shaft (to which the bead knife (224) is attached) and detects the vibration of the bead rotating shaft that is linked to the bead knife (224) when the bead knife (224) rotates.

[0085] Meanwhile, the inspection unit (24) compares the vibration value measured by the vibration sensor (26) with a pre-entered input value and determines it to be normal if it is within the set range, and determines it to be defective if it is outside. Accordingly, the abnormality can be checked through the vibration value of the bead knife (224).

[0086] In conclusion, the beading portion forming device (2) of a can according to the first embodiment of the present invention includes a first measuring unit (23), a second measuring unit (25), an inspection unit (24), and a vibration sensor (26), thereby accurately detecting whether there is an abnormality in the bead knife (224), and accordingly, accurately predicting the replacement time of the bead knife (224), and as a result, the defect rate during the forming of the beading portion of the can can be significantly reduced.

[0087] In the following description of other embodiments of the present invention, the same reference numerals are used for configurations identical or similar to those in the aforementioned embodiments, and redundant descriptions are omitted.

[0088] [Bidding part forming device for a can according to the second embodiment of the present invention]

[0089] FIG. 8 is a design drawing showing a beading part forming unit (22) included in a beading part forming device (2) of a can according to a second embodiment of the present invention.

[0090] A beading portion forming device (2) for a can according to a second embodiment of the present invention includes a suction unit (21), a beading portion forming unit (22), a first measuring unit (23), and an inspection unit (24).

[0091] Here, the suction unit (21), the beading part molding unit (22), the first measuring unit (23), and the inspection unit (24) correspond to the configuration described in the first embodiment, so a detailed description is omitted.

[0092] Meanwhile, the above-mentioned beading unit forming unit (22) includes a measuring unit (225) for reflecting a laser irradiated from the first measuring unit (23), and the measuring unit (225) may be the outer surface of the rotary (223).

[0093] That is, the first measuring unit (23) irradiates a laser onto the outer surface of the rotary (223), which is the measuring part (225).

[0094] Therefore, the beading part forming device (2) of a can according to the second embodiment of the present invention does not require the installation of a separate measuring part, so the structure can be simplified and costs can be reduced.

[0095] The scope of the present invention is defined by the claims set forth below rather than by the detailed description above, and various embodiments derived from the meaning and scope of the claims and equivalent concepts are possible.

[0096] [Explanation of the symbol]

[0097] 1: Secondary battery

[0098] 11: Electrode assembly

[0099] 12: Can

[0100] 121: Reception Department

[0101] 122: Bidding Department

[0102] 123: Clamping part

[0103] 13: Cap assembly

[0104] 2: Can beading section forming device

[0105] 21: Suction unit

[0106] 211: Circular body

[0107] 212: Cylindrical rotary

[0108] 22: Bidding section forming unit

[0109] 221: Shaft

[0110] 2211: Connection bar

[0111] 222: Insertion member

[0112] 223: Rotary

[0113] 224: Bead knife

[0114] 225: Measurement section

[0115] 2251: Connecting piece

[0116] 2252: Measuring piece

[0117] 2253: Vertical plane

[0118] 2254: Horizontal plane

[0119] 23: 1st measuring unit

[0120] 24: Inspection Unit

[0121] 25: Second measuring unit

[0122] 26: Vibration sensor

Claims

1. A beading portion forming device for a can that forms a beading portion on a can, A suction unit equipped with a circular body and a cylindrical rotary that is rotatably coupled to the circular body; A shaft connected to the above-mentioned cylindrical rotary via a connecting bar, an insertion member provided at the lower part of the shaft into which the opening of the can is inserted, a rotary rotary rotatably coupled to the shaft; and a beading portion forming unit comprising a bead knife coupled to the rotary rotary and forming a beading portion by pressing the main surface of the can. A first measuring unit for measuring displacement with respect to the rotational direction of the above-mentioned rotary; and A beading portion forming device for a can, comprising an inspection unit that compares a measurement value measured by the first measurement unit with a pre-entered input value to determine if it is within a set range and determines if it is defective.

2. In Claim 1, The above-mentioned first measuring unit is a displacement sensor and a beading part forming device for a can.

3. In Claim 2, The above rotary includes a measuring part, and The above-mentioned first measuring unit is a beading portion forming device for a can that irradiates a laser toward the measuring portion.

4. In Claim 3, The above measuring unit is, A coupling piece that is coupled to the above-mentioned rotary and rotates together with the above-mentioned rotary, and A beading portion forming device for a can comprising a measuring piece having a vertical surface irradiated by a laser of the first measuring unit.

5. In Claim 3, The above measuring unit is, A forming device for the beading portion of a can, which is the outer surface of the above-mentioned rotary.

6. In Claim 4, A beading portion forming device for a can, further comprising a second measuring unit for measuring positional displacement with respect to the rotational axis direction of the above-mentioned rotary.

7. In Claim 6, The above second measuring unit is a displacement sensor and a beading part forming device for a can.

8. In Claim 7, The above measuring piece is, A beading portion forming device for a can having a horizontal plane that reflects a laser irradiated from the second measuring unit above.

9. In Claim 6, The above inspection unit is, A beading part forming device for a can that compares a measured value measured by the second measuring unit with a pre-entered input value to determine if it is within a set range and determines if it is defective.

10. In Claim 1, A beading portion forming device for a can, further comprising a vibration sensor for detecting vibrations generated from the bead knife.

11. In Claim 10, The above inspection unit is, A beading part forming device for a can that compares a vibration value measured by the above vibration sensor with a pre-entered input value and determines it to be normal if it is within a set range, and determines it to be defective if it is outside.

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