Apparatus and method for monitoring abrasiveness of rotary forming tool for battery can

Abstract

Provided is an apparatus capable of monitoring the abrasiveness of a forming tool for applying pressure to a battery can in the radial direction of the battery can along the circumferential direction thereof while rotating the battery can, to perform plastic working of the battery can in the radial direction thereof. The apparatus comprises: a can table installed to be rotatable about the central axis thereof; a process tool which is installed to be rotatable about a predetermined rotational center, is installed to be movable in a direction in which the process tool approaches or moves away from a can installed on the can table, and has a processing surface provided around the rotational center; a pressure sensor pressurized by the processing surface and measuring a pressure distribution; and a monitoring unit for calculating information related to a profile of the processing surface from the pressure distribution.

Description

Wear monitoring device and method for a rotary molding processing tool for a battery can

[0001] This application claims the benefit of priority from Republic of Korea Patent Application No. 10-2024-0038715, filed March 20, 2024, the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to a device and method for monitoring the wear of a rotary molding tool for a battery can, and more particularly, to a device and method for monitoring the wear of a molding tool that rotates a battery can and applies pressure in a radial direction along the circumference of the battery can to plastically process the battery can in a radial direction.

[0003] A cylindrical battery is manufactured by accommodating an electrode assembly wound in a jelly-roll shape inside a metal can, and then forming the area near the open end of the side wall member of the can. The forming process includes a beading process in which the area near the open end of the side wall member of the can is plastically formed to be radially inwardly recessed. The forming process further includes a crimping process after the beading process in which the open end of the can is bent radially inwardly.

[0004] The above beading and crimping processes are performed by rotating a can containing an electrode assembly, approaching a processing tool from the radially outer side of the can, and performing plastic deformation along the circumferential direction of the can.

[0005] In the above beading and crimping processes, not only does the battery can rotate, but the processing tool also rotates. The peripheral surface of the can and the peripheral surface of the processing tool are in contact and rotate in a rolling motion, minimizing scratches on the can surface.

[0006] In the above beading and crimping processes, the battery can rotates as a driving force and the processing tool rotates as a driving force. Conversely, the processing tool may rotate as a driving force and the battery can rotate as a driving force. Furthermore, both the battery can and the processing tool may rotate as a driving force.

[0007] The above beading and crimping processes cause wear of the machining tools. If the machining tools wear out and the beading and crimping processes do not proceed as designed, there is a high possibility of defects occurring in subsequent processes. For example, the beading process area is relatively vulnerable due to the large amount of molding processing required, so if it is processed beyond the designed range, the possibility of side rupture during thermal runaway increases. Furthermore, if the beading or crimping process does not meet the designed range, the sealing force between the cap covering the open end of the can and the can may weaken, or the possibility of defects occurring when welding the current collector of the electrode assembly to the beading area may increase.

[0008] Traditionally, battery cans undergoing beading or crimping were photographed using vision to determine tool wear and its degree of wear. However, this method indirectly estimated tool wear through the shape of the machined area, making it difficult to accurately determine tool wear.

[0009] The present invention has been devised to solve the above-described problems, and aims to provide a battery can processing device and processing method capable of accurately measuring or identifying the degree of wear of a processing tool.

[0010] The present invention aims to provide a battery can processing device and processing method capable of measuring the wear of a processing tool at each molding process.

[0011] The technical objectives of the present invention are not limited to the purposes mentioned above. Other objectives and advantages of the present invention not mentioned above can be understood through the following description and will be more clearly understood through the embodiments of the present invention. Furthermore, it will be readily apparent that the objectives and advantages of the present invention can be realized by the means and combinations thereof set forth in the claims.

[0012] During the can processing process, a rolling processing tool presses the can radially inward and forms a processing surface on its outer circumference. The processing surface has a constant profile along the circumferential direction and continuously comes into rolling contact with the processing part to process the processing part. Accordingly, the wear of the processing surface also progresses evenly along the circumferential direction. The present invention was derived based on the characteristic of the processing tool that the profile of the processing surface measured at any position in the circumferential direction is constant throughout the entire circumferential direction.

[0013] The present invention, which aims to solve the above-described problem, can be applied to a can processing device or processing method that rotates a cylindrical can for a secondary battery and continuously causes plastic deformation along the circumferential direction of the can.

[0014] The above can is plastically deformed by being subjected to force by a machining tool.

[0015] As the above processing tool rotates, the can is plastically deformed.

[0016] The above processing tool can rotate the can and cloud.

[0017] The above processing tool can press the can radially inwardly.

[0018] The above processing tool and the can can rotate relative to each other.

[0019] During the above processing, the outer surface of the processing tool and the outer surface of the can can rotate relative to each other.

[0020] One of the above processing tool and the can can be driven and rotated, and the other can be in contact with it and rotated as a result.

[0021] Both the above processing tool and the above can be driven and rotated.

[0022] The above processing tool may be a beading knife for processing a beading portion on the side of the side wall member.

[0023] The above processing device may further include a head that grips the front end of the side wall member of the can.

[0024] The above processing device may further include a support roller provided on the opposite side of the beading knife with the head interposed therebetween.

[0025] The above processing tool may be a crimping roller that processes a crimping portion at the leading end of the side wall member.

[0026] The above processing device may include a can table on which the can is installed rotatable about its central axis.

[0027] The above processing tool is installed so as to be rotatable about a predetermined rotation center and is installed so as to be movable in a direction approaching or away from a can installed on the can table.

[0028] The above machining tool has a machining surface provided around the center of rotation.

[0029] The above processing device includes a pressure sensor that is pressurized by the processing surface and measures the pressure distribution.

[0030] The above processing tool can move from a standby position to a processing position for processing the can, perform plastic processing on the can, and after the plastic processing is completed, retreat from the processing position to the standby position.

[0031] The above pressure sensor can be installed at a position that is pressurized by the processing surface when the processing tool is positioned at the standby position.

[0032] The above processing tool can be placed between the can and the pressure sensor.

[0033] The above pressure sensor may include an electronic pressure sensor that measures pressure distribution in real time and quantifies and visualizes it as numerical data.

[0034] The above electronic pressure sensor provides a two-dimensional pressure sensing surface and can output a two-dimensional pressure distribution sensed on the two-dimensional pressure sensing surface.

[0035] The above two-dimensional pressure sensing surface can be arranged to intersect the moving direction of the processing tool.

[0036] The above two-dimensional pressure-sensitive surface can be arranged in a flat shape.

[0037] The movement direction of the above two-dimensional pressure sensing surface and the above processing tool can be orthogonal.

[0038] The above processing device may include a monitoring unit that calculates information related to the profile of the processing surface from the pressure distribution measured by the pressure sensor.

[0039] The above monitoring unit can extract the maximum pressure distribution among the pressure distributions arranged in a direction parallel to the rotation center of the above processing tool, thereby producing information related to the profile of the processing surface.

[0040] The above monitoring unit can predict the wear of the machining tool from the profile information of the machining surface of the produced machining tool.

[0041] A can processing method according to the present invention includes a step of bringing a processing tool in a standby position closer to a can.

[0042] The above can processing method includes a step of forming the can by continuously plastically deforming the can along the circumferential direction of the can while rotating the can and the processing tool in a cloud and applying pressure to the radial inner side of the can with the processing tool.

[0043] The above can processing method includes a step of returning the processing tool to a standby position after the processing is completed.

[0044] The above can processing method includes a step of measuring pressure distribution by causing a pressure sensor to be pressed by a processing surface provided on the peripheral surface of the processing tool while the processing tool is returned to the standby position.

[0045] The above can processing method includes a step of calculating profile information of a processing surface of the processing tool based on the pressure distribution, and determining the degree of wear of the processing tool from the profile information.

[0046] The above can processing method includes a step of measuring the pressure distribution using an electronic pressure sensor.

[0047] The above can processing method includes a step of extracting the maximum pressure distribution among the pressure distributions arranged in a direction parallel to the rotation center of the processing tool, calculating information related to the profile of the processing surface, and determining the degree of wear based on the information.

[0048] According to the present invention, a pressure sensor is pressurized by the outer surface of a machining tool that is positioned in a stationary state at a standby position, and a profile of the outer surface of the machining tool can be calculated from the measured pressure distribution.

[0049] According to the present invention, since an electronic pressure sensitive device having a sensing surface substantially orthogonal to the direction in which the processing tool returns to the standby position is used, the service life of the electronic pressure sensitive device can be further extended.

[0050] According to the present invention, the wear level is monitored by detecting the profile of the machining surface of the machining tool each time between machining operations, so that the defect rate in machining can be further reduced.

[0051] The device and method for monitoring wear of a machining tool of the present invention do not delay machining at all in monitoring the wear of the machining tool.

[0052] The machining tool wear monitoring device and method of the present invention can be additionally applied to conventional inspection methods, such as vision inspection, without any disruption or impact. This enables defect detection that cannot be achieved with vision alone, and also enables verification of the vision itself.

[0053] The present invention is very advantageous in that it can be applied to a process in which a molding processing tool rotates and wears uniformly in the circumferential direction.

[0054] In addition to the effects described above, specific effects of the present invention are described below while explaining specific details for carrying out the invention.

[0055] Figures 1 to 3 are a perspective view, a front view, and a front cross-sectional view of a can processing device according to the present invention in a standby state.

[0056] Fig. 4 is a front cross-sectional view showing the can table in Fig. 3 in a raised state.

[0057] Figure 5 is a front cross-sectional view showing the head lowered in Figure 4.

[0058] Figure 6 is a front cross-sectional view of the state in which the processing tool and the support roller in Figure 5 approach the outer periphery of the upper portion of the battery can and begin processing the beading portion.

[0059] Fig. 7 is a front cross-sectional view showing the state in which the processing tool and support roller have retreated and returned to the standby position after the beading portion processing in Fig. 6 is completed.

[0060] Fig. 8 is a front cross-sectional view showing the can table in Fig. 7 lowered and the head raised.

[0061] Fig. 9 is a perspective view of Fig. 8.

[0062] Figure 10 is a perspective view showing a state in which the outer surface of the machining tool presses the electronic pressure plate in the standby position.

[0063] Figure 11 is a plan view of Figure 10.

[0064] Figure 12 is a front view of Figure 10.

[0065] Figure 13 is a diagram schematically illustrating the pressure distribution arranged in a direction parallel to the center of rotation of the machining tool.

[0066] Figure 14 is a flow chart of the can processing method.

[0067] [Explanation of symbols]

[0068] 10: Can processing device 20: Support member 23: Table lifting guide 24: Pin lifting guide 25: Forming block guide 26: Support block guide 30: Can table 40: Head 41: Spindle 42: Lifting pin 45: Head driving part 46: Motor 47: Driving gear 48: Driven gear 50: Processing tool 51: Forming block 52: Beading knife 53: Processing surface (profile) p1: Standby position p2: Processing position 60: Support roller 61: Support block 70: Pressure sensor 71: Electronic pressure-sensitive paper 80: Monitoring part 90: Can 91: Side wall member 92: Bottom member

[0069] The above-described objects, features, and advantages will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can easily practice the technical idea of ​​the present invention. In describing the present invention, if it is determined that a detailed description of known technologies related to the present invention may unnecessarily obscure the gist of the present invention, a detailed description thereof will be omitted. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

[0070] Although terms like "first" and "second" are used to describe various components, these components are not limited by these terms. These terms are used merely to distinguish one component from another, and unless otherwise specified, a "first" component may also be a "second" component.

[0071] Throughout the specification, unless otherwise specifically stated, each element may be singular or plural.

[0072] Hereinafter, the phrase "any configuration is placed on (or below)" a component or "on (or below)" a component may mean that any configuration is placed in contact with the upper surface (or lower surface) of said component, and that other configurations may be interposed between said component and any configuration placed on (or below) said component.

[0073] Additionally, when it is described that a component is "connected," "coupled," or "connected" to another component, it should be understood that the components may be directly connected or connected to one another, but that other components may also be "interposed" between the components, or that each component may be "connected," "coupled," or "connected" through another component.

[0074] As used herein, singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as "consisting of" or "comprising" should not necessarily be construed to include all of the components or steps described in the specification, and should be construed to mean that some of the components or steps may not be included, or that additional components or steps may be included.

[0075] Throughout the specification, when we refer to "A and / or B", this means A, B, or A and B, unless otherwise stated, and when we refer to "C to D", this means C or more and D or less, unless otherwise stated.

[0076] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0077] In describing the embodiments, the term "axial direction" refers to a direction parallel to the core axis of the electrode assembly. The term "radial direction" refers to a direction approaching or away from the axis. The term "circular direction" refers to a direction surrounding the axis.

[0078] Referring to FIGS. 1 to 9, the can processing device (10) of the embodiment includes a support member (20) that supports a cylindrical can (90) to be processed and supports a processing tool (50) that processes the can (90).

[0079] In one example, the can processing device (10) may be a beading processing device that bead-processes the vicinity of the open end of the side wall member (91) of the can (90). In another example, the can processing device (10) may be a crimping processing device that crimps the open end of the side wall member (91) of the can (90) radially inward. In all of these, processing is performed while the processing tool (50) and the can (90) are in mutual cloud contact.

[0080] The embodiment exemplifies a beading processing device as the can processing device (10). However, the present disclosure is not limited to a beading processing device, and it is obvious that the present disclosure can be applied to other devices in which a processing tool (50) and a can (90) are in mutual cloud contact and a forming process is performed.

[0081] The can processing device (10) includes a can table (30) that supports the can (90). The can table (30) grips the bottom member (92) of the can (90) and supports the can (90) so that it can rotate. The can (90) is gripped on the can table (30) so that the bottom member (92) faces downward and the open end of the side wall member (91) faces upward.

[0082] The above support member (20) is provided with a table lifting guide (23) that guides the can table (30) to be raised and lowered in the vertical direction (axial direction). As illustrated in FIG. 4, when the can table (30) is raised, the can (90) moves to the processing position, and as illustrated in FIG. 8, when the can table (30) is lowered, the can (90) is retracted from the processing position.

[0083] The can processing device (10) includes a head (40) that axially supports the open end of the side wall member (91) of the can (90). As shown in Fig. 6, the head (40) supports and presses the can (90) in the axial direction, and can drive the can (90) to rotate.

[0084] The above head (40) includes a spindle (41) that rotates the head (40) and an elevator pin (42) that is rotationally constrained to the spindle (41) and can slide in the axial direction.

[0085] According to an embodiment, the spindle (41) can be rotationally driven by a motor (46). A driven gear (48) that rotates together with the spindle (41) is provided at the upper end of the spindle (41). The driven gear (48) is meshed with a driving gear (47), and the motor (46) can rotate the driving gear (47) to rotate the spindle (41). However, the rotational driving structure of the spindle (41) is not limited thereto.

[0086] Referring to FIGS. 5, 6, and 8, the lifting pin (42) is raised and lowered by a separate lifting drive unit. Accordingly, the lower end of the lifting pin (42) is raised and lowered, and the open end of the side wall member (91) of the can (90) can be axially pressed or released, and the spindle (41) can rotate the lifting pin (42) and the can (90) engaged with the lower end of the lifting pin (42).

[0087] The embodiment exemplifies a structure in which a head (40) rotates a can (90), and a processing tool (50), which will be described later, radially contacts the can (90) and rotates in a cloud manner. However, as previously described, whether the driving is performed through the head (40), the processing tool (50), or both, can be selected as needed. In addition, it goes without saying that the can (90) can also be rotated through the can table (30).

[0088] The above support member (20) is provided with a pin elevation guide (24) that guides the elevation of the elevation pin (42). For example, the pin elevation guide (24) may be provided on the upper portion of the spindle (41). However, the position of the pin elevation guide (24) is not limited thereto.

[0089] The above can processing device (10) includes a processing tool (50) that approaches the can (90) in a radial direction and forms a side wall member (91) of the can (90).

[0090] The above machining tool (50) rolls and presses the can (90) radially inward during the machining process of the can (90), and its outer circumferential surface forms a machining surface (53). The machining surface (53) has a constant profile along the circumferential direction and continuously rolls and contacts the machining portion provided on the side wall member (91) of the can (90) to machine the machining portion. Accordingly, the wear of the machining surface (53) also progresses evenly along the circumferential direction. That is, the machining surface (53) has a uniform profile along the circumferential direction. Accordingly, the profile of the machining surface (53) measured at any position of the machining tool (50) can represent the profile of the machining surface (53) of the machining tool (50).

[0091] As shown in Fig. 6, the above processing tool (50) presses the side wall member (91) of the can (90) radially inward to plastically deform the side wall member (91).

[0092] The above processing tool (50) and the can (90) can rotate in a cloud manner with respect to each other, and during the processing process, the outer surface of the processing tool (50) and the outer surface of the can (90) can rotate in a cloud manner with respect to each other.

[0093] At this time, one of the processing tool (50) and the can (90) can be driven and rotated, and the other can be in contact with it and rotated accordingly. Alternatively, both the processing tool (50) and the can (90) can be driven and rotated.

[0094] The embodiment exemplifies that the processing tool (50) is a beading knife (52) that processes a beading portion on the side of the side wall member (91).

[0095] The above support member (20) is provided with a forming block guide (25) that guides the movement of the processing tool (50) in the radial direction toward or away from the can (90). In one example, the forming block guide (25) is provided on one side of the spindle (41). However, the position of the forming block guide (25) is not limited thereto.

[0096] The above beading knife (52) is rotatably installed on a forming block (51) that slides and is guided by the forming block guide (25). The forming block (51) can slide, for example, through a linear motion guide.

[0097] For example, the linear motion guide may include a step motor capable of accurately regulating the slide movement distance and position of the forming block (51). That is, the processing tool (50) may be transported by a transport device capable of accurately regulating or controlling the movement and position of the processing tool (50).

[0098] The above processing tool (50) can be slidably moved between the standby position (p1) shown in FIGS. 5 and 7 and the processing position (p2) shown in FIG. 6 by the transport device.

[0099] The can processing device (10) may further include a support roller (60) provided on the opposite side of the beading knife (52) with the head (40) therebetween. The support roller (60) approaches the can (90) in the radial direction and supports the can (90) in the radial direction. Accordingly, the support roller (60) supports the pressing force of the beading knife (52) through the can (90) on the opposite side of the beading knife (52).

[0100] The above support member (20) is provided with a support block guide (26) that guides the movement of the support roller (60) in the radial direction toward or away from the can (90). In one example, the support block guide (26) is provided on the other side of the spindle (41). However, the position of the support block guide (26) is not limited thereto.

[0101] The above support roller (60) is rotatably installed on a support block (61) that slides and is guided by the support block guide (26). The support block (61) can slide, for example, by a linear motion guide. The support roller (60) can also be transported by a transport device that can precisely regulate or control its movement and position.

[0102] Referring to FIGS. 10 to 13, the can processing device (10) includes a pressure sensor (70) that measures the pressure distribution applied by the processing surface (53) of the processing tool (50).

[0103] The above processing tool (50) can move from the standby position (p1) to the processing position (p2) for processing the can (90), perform plastic processing on the can (90), and after the plastic processing is completed, retreat from the processing position (p2) to the standby position (p1).

[0104] The above pressure sensor (70) can be installed at a position that is pressurized by the processing surface (53) when the processing tool (50) is positioned at the standby position (p1).

[0105] The above processing tool (50) can be positioned radially between the can (90) and the pressure sensor (70).

[0106] For example, the pressure sensor (70) may include an electronic pressure sensor (71) that measures pressure distribution in real time, quantifies it into numerical data, and visualizes it. The electronic pressure sensor (71) may provide a two-dimensional (x, y) pressure sensing surface and output a two-dimensional pressure distribution sensed on the two-dimensional pressure sensing surface.

[0107] The two-dimensional pressure sensing surface is arranged in a planar shape, and the two-dimensional pressure sensing surface can be arranged to intersect the moving direction of the processing tool (50), and preferably, the two-dimensional pressure sensing surface and the moving direction of the processing tool (50) can be orthogonal.

[0108] The can processing device (10) may include a monitoring unit (80) that calculates information related to the profile of the processing surface from the pressure distribution measured by the pressure sensor (70). The pressure sensor (70) may provide the pressure distribution received by the processing tool (50) to the monitoring unit (80) as an electrical signal.

[0109] The above monitoring unit (80) can extract the maximum pressure distribution among a plurality of pressure distributions (see FIG. 13) arranged in a direction (y) parallel to the rotation center of the above processing tool (50) and measured at different positions (see FIG. 11) in the width direction (x) to produce information related to the profile of the processing surface.

[0110] The above monitoring unit can predict the wear of the processing tool (50) from the profile information of the processing surface of the produced processing tool (50).

[0111] The processing process of the can processing device (10) according to the present invention will be described with reference to the preceding drawings and FIG. 14.

[0112] First, as shown in FIGS. 1 to 4, a can (90) requiring processing is supplied to a can table (30), and the can table (30) supporting the lower portion of the can (90) is raised along the table lifting guide (23). At this time, the beading knife (52) and the support roller (60), which are the processing tools (50), are maintained in a standby state at a standby position (p1).

[0113] Next, as shown in Fig. 5, the lifting pin (42) is lowered so that the head (40) supports the upper part of the can (90).

[0114] In this state, as illustrated in FIG. 6, the machining tool (50) of the standby position (p1) is brought radially closer to the can (90). For example, the machining tool (50) may be a lifting pin (42). When the machining tool (50) reaches the machining position (p2), the head driving unit (45) is operated to rotate the head (40). Accordingly, the can (90) and the machining tool (50) are rotated in a rolling manner, and the machining tool (50) is pressed radially inwardly of the can (90), thereby continuously plastically deforming the can (90) along the circumferential direction of the can (90) to perform forming processing.

[0115] Next, after the above processing is completed, as shown in Fig. 8, the processing tool (50) and the support roller (60) are returned to the standby position (p1).

[0116] As illustrated in FIGS. 9 to 12, the processing surface (53) of the beading knife (52) that has returned to the standby position (p1) presses the pressure sensor (70). Accordingly, the pressure sensor (70) provides a plurality of pressure profiles arranged along the width direction (x) and measured along the up-down direction (y) as electrical signals to the monitoring unit (80), as illustrated in FIG. 13.

[0117] The monitoring unit (80) extracts the profile with the greatest pressure among these, and derives profile information of the machining surface of the machining tool (50) from this. From this, the wear degree of the machining tool (50) is determined.

[0118] The above can processing method measures the pressure distribution using an electronic pressure sensor (71).

[0119] According to an embodiment, since the pressure sensor (70) is pressurized by the outer surface of the processing tool (50) which is positioned in a stationary state at the standby position (p1), damage to the pressure sensor (70) can be prevented. In addition, since the direction in which the processing tool (50) returns to the standby position (p1) and the surface of the electronic pressure-sensitive paper (71) are perpendicular to each other, the service life of the electronic pressure-sensitive paper can be further extended.

[0120] In an embodiment, the wear level is monitored by detecting the profile of the machining surface of the machining tool after each machining operation on the can, thereby further reducing the machining defect rate, while this monitoring operation does not delay the machining at all.

[0121] Furthermore, this type of monitoring method can be applied additionally to conventional inspection methods without any disruption or influence, enabling defect checks that cannot be performed with vision alone, and also enabling verification of the vision itself.

[0122] It should be understood that the above-described embodiments are illustrative in all respects and not restrictive, and the scope of the present invention will be determined by the claims that follow, rather than by the detailed description set forth above. Furthermore, the meaning and scope of the claims that follow, as well as all possible modifications and variations derived from their equivalent concepts, should be construed as encompassing the scope of the present invention.

[0123] Although the present invention has been described with reference to the drawings exemplified above, it is to be understood that the present invention is not limited to the embodiments and drawings disclosed herein, and that various modifications may be made by those skilled in the art within the scope of the technical idea of ​​the present invention. Furthermore, even if the operational effects according to the configuration of the present invention have not been explicitly described while describing the embodiments of the present invention, it is natural that the effects predictable by the corresponding configuration should also be acknowledged.

Claims

1. A can processing device for plastic processing the axial edge of a side wall member of a cylindrical can for secondary batteries. A can table on which the can is installed rotatable about its central axis; A machining tool that is installed rotatable about a predetermined center of rotation and is installed so as to be movable in a direction approaching or moving away from a can installed on the can table, and has a machining surface provided around the center of rotation; A pressure sensor that is pressurized by the above-mentioned processing surface and measures the pressure distribution; and A can processing device, comprising a monitoring unit that calculates information related to the profile of the processing surface from the pressure distribution.

2. In claim 1, the processing tool moves from a standby position to a processing position for processing the can, and retreats from the processing position to the standby position. A can processing device, wherein the pressure sensor is installed at a position that is pressurized by the processing surface when the processing tool is positioned at the standby position.

3. In claim 2, the processing tool is a can processing device disposed between the can and the pressure sensor.

4. A can processing device according to claim 1, wherein the pressure sensor includes an electronic pressure sensor that measures pressure distribution in real time and quantifies and visualizes it as numerical data.

5. A can processing device according to claim 4, wherein the electronic pressure sensor provides a two-dimensional pressure sensing surface and outputs a two-dimensional pressure distribution sensed on the two-dimensional pressure sensing surface.

6. In claim 5, the two-dimensional pressure-sensitive surface intersects the moving direction of the processing tool, a can processing device.

7. In claim 5, the monitoring unit extracts the maximum pressure distribution among the pressure distributions arranged in a direction parallel to the rotation center of the processing tool, and calculates information related to the profile of the processing surface.

8. A can processing device according to claim 1, wherein the processing tool includes a beading knife for processing a beading portion on the side surface of the side wall member.

9. A can processing device according to claim 8, further comprising a head for gripping the front end of the side wall member of the can.

10. A can processing device according to claim 3, further comprising a support roller provided on the opposite side of the beading knife with the head interposed therebetween.

11. A can processing device according to claim 1, wherein the processing tool includes a crimping roller that processes a crimping portion on the leading end of the side wall member.

12. Step of bringing the processing tool in the waiting position closer to the can; A step of forming a can by rotating a can and a processing tool and applying pressure to the radial inner side of the can to plastically deform the can in the circumferential direction; A step of returning the processing tool to the standby position after the above processing is completed; A step of measuring the pressure distribution by causing the pressure sensor to be pressurized by the machining surface provided on the circumferential surface of the machining tool at the above-mentioned standby position; and A can processing method comprising: a step of calculating profile information of a processing surface of the processing tool based on the pressure distribution, and determining the degree of wear of the processing tool from the profile information.

13. A can processing method according to claim 12, wherein the pressure distribution is measured using an electronic pressure sensor.

14. A can processing method according to claim 13, wherein the maximum pressure distribution is extracted from the pressure distributions arranged in a direction parallel to the rotation center of the processing tool to derive information related to the profile of the processing surface, and the wear is determined based on this.

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