KR-102964339-B1 - Laser Disk Welding System Equipped with a Rotary Taping Vision Inspection Unit for Precise Taping Position Measurement

KR102964339B1KR 102964339 B1KR102964339 B1KR 102964339B1KR-102964339-B1

Abstract

The present invention relates to a disc welding system equipped with a rotary taping film vision inspection unit for precise measurement of the taping position, wherein after the taping process on the outer surface of the end of a jelly roll in which disc welding is completed, the position, uniformity, and alignment status of the taped film can be precisely measured by vision while rotating the jelly roll in a gripped state. The present invention comprises a shuttle unit that transports a jelly roll to each process position while moving along a transport track, a disc welding unit that welds a disc to the end of the jelly roll, a taping unit that tapes the outer surface of the end of the jelly roll with a film, and a forming unit that presses the protruding end of the film taped by the taping unit toward the circumference of the end surface of the jelly roll to form it into a cylindrical shape that adheres to the circumference of the end surface of the jelly roll, and further comprises a taping film vision inspection unit that inspects the quality of the taping film of the jelly roll formed by the forming unit using a vision device, wherein the taping film vision inspection unit comprises a gripping part that grips the jelly roll, a rotary driving part that rotates the gripping part, and a vision camera that photographs the taped and formed outer surface of the rotating jelly roll.

Inventors

오행옥
전철우

Assignees

주식회사 두민

Dates

Publication Date: 20260513
Application Date: 20260112
Priority Date: 20250728

Claims (11)

In a disc welding system for welding a disc to the end of a cylindrical jelly roll and performing the subsequent process, It includes a shuttle unit that transports the jelly roll to each process position while moving along a transport track, a disc welding unit that welds a disc to the end of the jelly roll, a taping unit that tapes the outer surface of the end of the jelly roll with a film, and a forming unit that presses the protruding end of the film taped by the taping unit toward the circumference of the end surface of the jelly roll to form a cylindrical shape that adheres to the circumference of the end surface of the jelly roll. The apparatus further includes a taping film vision inspection unit for inspecting the quality of the taping film of a jelly roll formed by the above-described forming unit using a vision system, wherein the taping film vision inspection unit includes a gripping part for gripping the jelly roll, a rotary drive part for rotating the gripping part, and a vision camera for photographing the taped and formed outer surface of the rotating jelly roll. The above forming unit includes a forming gripper that grasps a jelly roll and transports it to a forming position, and a forming member having a press-fit hole formed therein into which one end of the jelly roll grasped by the forming gripper is inserted, and as the forming member rotates while the one end of the jelly roll is pressed into the press-fit hole, the protruding end of the taped film is pressed toward the circumference of the one end surface of the jelly roll, thereby forming it into a cylindrical shape that is in close contact with the circumference of the one end surface of the jelly roll. The above forming member is positioned at the rear side of the press-fit hole and formed to protrude toward the center of the press-fit hole, and includes a plurality of forming segments arranged continuously in a circumferential direction; when one end of the jelly roll is pressed into the press-fit hole, the forming segments press the protruding end of the taped film toward the circumference of the end surface of the jelly roll to form a tight-fitting film. The adjacent end lines between the above-mentioned forming segments are finished with curved surfaces to prevent abrupt step differences from occurring at adjacent parts of the above-mentioned forming segments, and A disc welding system characterized in that the main body of the above-described forming member comprises a cylindrical main body portion having a central hole formed on the front and a ring-shaped cover portion covering the front periphery of the main body portion from the front, and a first seating groove and a second seating groove are formed facing each other on the front periphery of the main body portion and the rear surface of the cover portion, respectively, so that the outer ends of the forming segment are positioned thereon.
In paragraph 1, The above rotary drive unit includes a servo motor and an encoder, and The gripping part rotates the jelly roll in the circumferential direction according to the driving of the above servo motor, and A disc welding system characterized by measuring the rotation angle through the above encoder and having a vision camera inspect the position and uniformity of the taped and formed film.
In paragraph 2, The above-described taping film vision inspection unit further includes a forward and backward cylinder for moving the jelly roll to the shooting position of the vision camera, and A disc welding system characterized by the gripping part advancing toward the vision camera side and performing a rotational inspection in accordance with the driving of the above-mentioned forward and backward cylinder.
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In paragraph 1, The above forming segment has its inner end hinge-connected to the front end of a support member supported on the inner circumference of the central hole of the main body via a hinge pin, and the rear surface of the outer end is elastically supported by a spring installed in the first seating groove, A disc welding system characterized by allowing elastic displacement while being pushed slightly backward when the forming segment is pressed from the front by the perimeter of one end surface of the jelly roll and the taped film, and then returning to its original position by the restoring force of the spring.
In paragraph 8, A disc welding system characterized by having a support and a spring that correspond one-to-one to each of the above-mentioned forming segments, so that individual forming segments can be elastically displaced independently even if the shape of the protruding end of the taped film is non-uniform.
In Paragraph 9, The above cover portion is composed of a plurality of unit covers formed by dividing along the front perimeter of the main body portion, and A disc welding system characterized in that each unit cover is formed to correspond to an area where a plurality of forming segments are arranged, and is configured to cover and restrain the outer ends of the plurality of forming segments so as not to deviate in the forward direction.
In paragraph 1, It is equipped with a forming cylinder coupled to the rear of the main body of the above-mentioned forming member and providing rotational driving force to the main body during forming, A disc welding system characterized by including an actuator for moving the forming member forward and backward toward a jelly roll held by the forming gripper.

Description

Laser Disk Welding System Equipped with a Rotary Taping Vision Inspection Unit for Precise Taping Position Measurement The present invention relates to a disc welding system for welding a negative/positive disc to a circular jelly roll, and more specifically, to a disc welding system equipped with a rotary taping film vision inspection unit that enables precise measurement of the position, uniformity, and alignment status of the taped film using a vision system while rotating the jelly roll in a gripped state after a taping process on the outer circumference of the end of the jelly roll in which the disc welding is completed. Generally, a cylindrical battery including a circular jelly roll ensures current conductivity and maintains mechanical stability of the battery's internal components by welding a negative or positive disc to the end of the jelly roll. After this disc welding process, a taping process is performed to wrap and attach a film to protect the outer surface of the end of the jelly roll or to seal a fine gap in the end. In conventional taping processes, methods were mainly used in which a jelly roll was rotated by an external device or a simple support device was used to wind the film and then cut and form it. However, due to axial wobble, fine eccentricity, and uneven rotation of the jelly roll, there were problems such as variations in taping thickness, asymmetry in the winding pattern, and defects in the gap at the film ends. In addition, in conventional taping processes, visual inspection or simple frontal vision inspection has been used to verify taping quality; however, there were limitations in that precise measurements based on rotation angle could not be performed because it was difficult to uniformly detect the entire circumference of the outer surface of the jelly roll end. As a result, it was difficult to detect early defects such as film winding gaps, shrinkage or lifting of the forming end, and positional defects, which caused problems with the quality stability of the entire process. In particular, although the end taping of a jelly roll must be uniform across the entire circumference, conventional inspection methods have the problem of being unable to quantitatively manage the rotation criteria of the jelly roll, making it difficult to precisely detect the taping condition. Therefore, a new vision inspection technology is required that can precisely analyze the taping position, winding uniformity, and forming condition by continuously photographing the entire outer surface while rotating the taped jelly roll at a constant reference angle. FIG. 1 is a block diagram of a disk welding system according to an embodiment of the present invention. FIG. 2 is a perspective view of a taping film vision inspection unit in a disk welding system according to an embodiment of the present invention. FIGS. 3 and 4 are partial enlarged views illustrating the camera of a taping film vision inspection unit in a disk welding system according to an embodiment of the present invention. FIG. 5 is a perspective view of a forming unit in a disk welding system according to an embodiment of the present invention. FIG. 6 is a perspective view of a forming member included in a forming unit in a disc welding system according to an embodiment of the present invention. FIG. 7 is a front view of a forming member included in a forming unit in a disc welding system according to an embodiment of the present invention. FIG. 8 is a partially exploded view of a forming member included in a forming unit in a disc welding system according to an embodiment of the present invention. A disc welding system according to embodiments of the present invention will be described in detail with reference to the attached drawings. Since the present invention is susceptible to various modifications and may take various forms, specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed forms, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the present invention. Similar reference numerals have been used for similar components in the description of each drawing. In the attached drawings, the dimensions of the structures are shown enlarged or reduced to the actual size to ensure clarity of the present invention or to understand the schematic configuration. Additionally, terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component. Meanwhile, unless otherwise defined, all ter