Rotary can beading apparatus

Abstract

Provided is a rotary-type can beading apparatus capable of automatically correcting the height of a head. The rotary-type can beading apparatus comprises: a rotary; a plurality of arms which are arranged along the circumference of the rotary so as to rotate along with the rotary, and which extend in the radial direction; a head which is rotatably installed on each of the arms and is installed so as to be slidable in the axial direction; a beading knife which is installed on each of the arms so as to be movable in the direction moving close toward the rotation axis or moving away therefrom; a support roller which is arranged so as to face the beading knife with the rotation axis therebetween; a first rail cam which is provided with a first height profile extending in the circumferential direction with respect to the central axis; and a first cam follower which is raised along with the head and adjusts the height of the head by following the first height profile. The height of the first rail cam is adjusted by the operation of a first servo motor.

Description

Rotary can beading device

[0001] This application claims the benefit of priority from Republic of Korea Patent Application No. 10-2023-0191943, dated December 26, 2023, the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to a can beading device, and more particularly, to a rotary type can beading device capable of automatic correction of head height.

[0003] A rotary can beading device is a device that forms a beading portion around the open end of a side wall member of a cylindrical can while the can rotates around a rotary. The beading portion is processed after an electrode assembly is accommodated within the can, thereby fixing the electrode assembly accommodated within the can.

[0004] These rotary can beading devices, while having a fast processing speed, require precise control of the height of the can while it rotates around the rotary, the height of the head supporting the open end of the side wall member of the can, and the position of the beading knife in the radial direction of the can.

[0005] However, previously, as shown in Korean Patent Publication No. 2023-0038848, the head height had to be set manually, and verification was inevitably time-consuming. The time required for a skilled worker to set and verify the head height was significant, and when a skilled worker was absent, calibration and maintenance inevitably took even longer. This led to a decline in production efficiency.

[0006] The present invention has been devised to solve the above-described problems, and aims to provide a rotary beading device that can accurately and automatically correct the alignment of a head in a rotary beading molding process, thereby enabling quick and accurate correction and management of the rotary beading device.

[0007] 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.

[0008] The present invention can be applied to a rotary can beading device including a rotary that rotates about a central axis, a plurality of arms that are arranged along the circumference of the rotary and extend in a radial direction so as to rotate together with the rotary, a head that is installed to be rotatable about the rotation axis on each of the arms and is installed to be slidable in the axial direction, a first rail cam having a first height profile that extends in the circumferential direction about the central axis, and a first cam follower that rises and falls together with the head and follows the first height profile to adjust the height of the head.

[0009] The above rotary can beading device may further include a plurality of can tables arranged along the circumference of the rotary and extending in the radial direction so as to rotate together with the rotary, a can support provided on a radially outer side of the can table so as to rotate together with the can table and installed rotatable relative to the can table about the rotation axis, a second rail cam having a second height profile extending in the circumferential direction about the central axis, and a second cam follower that moves up and down together with the can support and follows the second height profile to adjust the height of the can support.

[0010] The rotary can beading device may further include a beading knife installed on each of the arms so as to be movable toward or away from the rotation axis, a third rail cam having a first radial profile extending circumferentially about the central axis, and a third cam follower that moves radially about the rotation axis together with the beading knife and follows the first radial profile to adjust a radial distance of the beading knife with respect to the rotation axis of the head.

[0011] The above rotary can beading device may further include a support roller disposed opposite the beading knife with the rotation axis therebetween, a fourth rail cam having a second radial profile extending circumferentially with respect to the central axis, and a fourth cam follower that moves radially with respect to the rotation axis together with the support roller and follows the second radial profile to adjust the radial distance of the support roller with respect to the rotation axis of the head.

[0012] The above rotary can beading device may include a first rail extending circumferentially about the central axis, and a first roller that ascends and descends together with the head and follows the first rail.

[0013] The height of the head in the first section in the circumferential direction can be determined by the first rail cam.

[0014] The height of the head in the second section that does not overlap the first section in the circumferential direction can be determined by the first rail.

[0015] The above rotary can beading device may include a second rail extending circumferentially about the central axis, and a second roller that ascends and descends together with the can holder and follows the second rail.

[0016] The height of the can table in the third section in the circumferential direction can be determined by the second rail cam. The height of the can table in the fourth section, which does not overlap the third section in the circumferential direction, can be determined by the first rail.

[0017] The rotary can beading device of the present invention for solving the above-described problem adjusts the height of the first rail cam by the operation of the first servo motor.

[0018] The elevation direction of the first rail cam is determined by the rotational direction of the first servo motor, and the elevation height of the first rail cam can be determined by the rotational speed of the first servo motor.

[0019] The above rotary can beading device may further include a monitoring unit that acquires height information of the head.

[0020] The rotation direction and rotation speed of the first servo motor can be determined based on the height information of the head acquired by the monitoring unit.

[0021] The above first rail cam is installed so as to be able to ascend and descend on the first frame, and the above first servo motor can be installed on the first frame.

[0022] The first rail cam and the first servo motor are installed on the same part, so that the height of the first rail cam can be accurately compensated.

[0023] The first frame may be provided with a first rail elevation guide that guides the elevation of the first rail cam. The first rail cam may be restricted from moving radially and circumferentially relative to the first rail elevation guide, but may be permitted to move up and down.

[0024] The first servo motor above rotates the ball screw at a controlled rotational speed, and the forward and backward movement of the slider coupled to the ball screw in the form of a ball nut along the longitudinal direction of the ball screw can be linked to the upward and downward movement of the rail cam.

[0025] The above slider and rail cam have a pair of sliding inclined surfaces whose heights change in the up-down direction with respect to the longitudinal direction of the ball screw, and as the pair of sliding inclined surfaces slide, the forward and backward movements can be linked with the upward and downward movements.

[0026] In order to solve the above-described problem, the rotary can beading device of the present invention adjusts the height of the second rail cam by the operation of the second servo motor.

[0027] The elevation direction of the second rail cam is determined by the rotational direction of the second servo motor, and the elevation height of the second rail cam can be determined by the rotational speed of the second servo motor.

[0028] The rotation direction and rotation speed of the second servo motor may correspond to or be complementary to the rotation direction and rotation speed of the first servo motor.

[0029] The second rail cam is installed so as to be able to ascend and descend on the second frame, and the second servo motor can be installed on the second frame.

[0030] The second rail cam and second servo motor are installed on the same part, so that the height of the second rail cam can be accurately compensated.

[0031] The second frame may be provided with a second rail elevation guide that guides the elevation of the second rail cam. The second rail cam may be restricted from moving radially and circumferentially relative to the second rail elevation guide, but may be permitted to move up and down.

[0032] The second servo motor rotates the ball screw at a controlled rotational speed, and the slider connected to the ball screw in the form of a ball nut can move forward and backward along the longitudinal direction of the ball screw in conjunction with the rising and falling movements of the second rail cam.

[0033] The above slider and the second rail cam have a pair of sliding inclined surfaces whose heights change in the up-down direction with respect to the longitudinal direction of the ball screw, and as the pair of sliding inclined surfaces slide, the forward and backward motions can be linked with the upward and downward motions.

[0034] The first cam follower can have its relative height with respect to the head adjusted by rotation of an adjustment shaft, the relative height of the first cam follower with respect to the head varying depending on the rotation angle.

[0035] The above-mentioned adjustment shaft can be fixed so that it is allowed to rotate or not rotate by the locking control unit.

[0036] The above-mentioned control axis can have its rotation angle adjusted by a third servo motor installed so as to be able to approach and retract from the above-mentioned control axis.

[0037] The above locking control unit may include a locking nut that locks or unlocks the adjusting shaft depending on the direction of rotation, and a nut runner that is installed to be accessible and retractable to the locking nut so as to rotate the locking nut.

[0038] Accordingly, the locking and unlocking operations of the lock nut can also be automated by the nut runner, and the adjustment of the above-mentioned adjusting shaft can also be precisely performed by precisely controlling the rotational direction and rotational speed of the third servo motor.

[0039] That is, the height of the head can be adjusted by adjusting the position of the first cam follower by adjusting the adjustment axis with the third servo motor while the nut runner releases the lock nut.

[0040] The above third servo motor, nut runner, and monitoring unit can all be installed in the first frame.

[0041] The head requiring height adjustment can be moved by rotating the rotary to the third servo motor and nut runner, and then compensation can be made.

[0042] Once the above corrections are complete, the cans can be formed and data trends can be analyzed with a measuring instrument.

[0043] According to the present invention, the heights of all heads of a rotary can beading device can be automatically and precisely controlled and corrected by a first servo motor, the heights of all can supports can be automatically and precisely controlled and corrected by a second servo motor, and the heights of individual heads can be automatically and precisely controlled and corrected by a third servo motor.

[0044] According to the present invention, product quality can be secured in real time, and even if a quality abnormality occurs, precise correction can be made automatically and immediately, thereby increasing productivity.

[0045] According to the present invention, the height of each head can also be automatically and precisely adjusted, so that data trends can be analyzed and immediate action can be taken on each head requiring correction, thereby further reducing the defect rate.

[0046] 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.

[0047] Figures 1 and 2 are a top perspective view and a front view of the rotary can beading device of the embodiment.

[0048] Figure 3 is a top perspective view of Figure 1 with the upper frame omitted.

[0049] Fig. 4 is a bottom perspective view of the upper frame of the rotary can beading device of Fig. 1.

[0050] Figure 5 is a bottom perspective view of Figure 1 with the lower frame omitted.

[0051] Fig. 6 is a top perspective view of the lower frame of the rotary can beading device of Fig. 1.

[0052] Fig. 7 is a top perspective view of the lower frame and the rotary of the rotary can beading device of Fig. 1.

[0053] Figure 8 is a front cross-sectional view of the upper frame, lower frame, and rotary.

[0054] Figure 9 is a front cross-sectional view showing a state in which a can is supplied to a rotary can beading device.

[0055] Figure 10 is a front cross-sectional view showing a state in which a can is beaded in a rotary can beading device.

[0056] Fig. 11 is an enlarged cross-sectional view of the head, knife, and support roller portions of the rotary can beading device of the embodiment.

[0057] Figure 12 is a cross-sectional perspective view of the spindle.

[0058] Fig. 13 is a cross-sectional perspective view showing the shaft of the spindle of Fig. 12 omitted.

[0059] Figure 14 is an enlarged cross-sectional view of an automatic compensation device for adjusting the height of all heads and an automatic compensation device for adjusting the height of individual heads.

[0060] Figure 15 is an enlarged cross-sectional view of the automatic compensation device for adjusting the height of all can supports.

[0061] Figures 16 to 19 sequentially illustrate the process of adjusting the height of individual heads.

[0062] Figures 20 and 21 are exploded perspective views and assembled perspective views of the individual head height adjustment structure of the embodiment.

[0063] Figure 22 is a perspective view of the individual heads of Figure 21 with their heights adjusted.

[0064] [Explanation of symbols]

[0065] 1: Rotary can beading device 2: Can 10: Rotary 101: Central axis 12: Outer rotation rotary 121: Table lifting guide 14: Inner rotation rotary 141: Spindle drive support 143: Spindle drive unit 145: Drive motor 147: Drive gear 16: Support rotary 17: Knife rail cam (third rail cam) 172: Knife radial position profile 20: Arm 21: Spindle support 22: Bearing 23: Shaft lifting guide 24: Shaft support member 25: Knife movement guide 26: Roller movement guide 30: Spindle 301: Rotation axis 31: Housing 32: Driven gear 33: Sleeve 34: Shaft 35: Head cam follower (first cam follower) 351: Adjusting shaft 352: Locking control unit 353: Lock nut 354: Eccentric shaft 37: Head 39: Head roller (first roller) 40: Beading knife 41: Knife support 42: Knife support shaft 43: Knife cam follower (third cam follower) 50: Support roller 51: Roller support 52: Roller support shaft 53: Support cam follower (fourth cam follower) 60: Can table 61: Can holder 62: Can cam follower (second cam follower) 63: Can roller (second roller) 70: Upper frame (first frame) 71: Upper rail cam (first rail cam) 72: Upper rail lifting guide (first rail lifting guide) 73: Upper servo motor (first servo motor) 731: Ball screw (first ball screw) 74: Slider 741: Sliding slope 75: Control servo motor (third servo motor) 76: Nut runner 77: Upper rail (first rail) 79: Monitoring unit 80: Lower frame (second frame) 81: Lower rail cam (second rail cam) 82: Lower rail lifting guide (second rail lifting guide) 83: Lower servo motor (second servo motor) 831: Ball screw (second ball screw) 84: Slider 85: Lower rail (second rail) 86: Middle table 87: Support rail cam (fourth rail cam) 871: Support roller radial position profile

[0066] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0067] The present invention is not limited to the embodiments disclosed below, but can be implemented in various forms and with various modifications. However, these embodiments are provided to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention. Therefore, the present invention is not limited to the embodiments disclosed below, but should be understood to include all modifications, equivalents, and substitutes included within the technical spirit and scope of the present invention, as well as substitutions or additions of the components of one embodiment with those of another embodiment.

[0068] The attached drawings are merely intended to facilitate understanding of the embodiments disclosed in this specification, and should not be construed as limiting the technical ideas disclosed in this specification, but should be understood to encompass all modifications, equivalents, and substitutes included within the spirit and technical scope of the present invention. In the drawings, the components may be expressed in exaggerated sizes or thicknesses for ease of understanding, but the scope of protection of the present invention should not be construed as being limited thereby.

[0069] The terminology used in this specification is only used to describe specific implementations or examples and is not intended to limit the present invention. In addition, the singular expression includes the plural expression unless the context clearly indicates otherwise. In the specification, terms such as "comprises" and "consists of" are intended to indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification. In other words, it should be understood that terms such as "comprises" and "consists of" in the specification do not exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0070] While terms including ordinal numbers, such as "first" and "second," may be used to describe various components, these components are not limited by these terms. These terms are used solely to distinguish one component from another. Therefore, unless otherwise stated, a "first" component may also be a "second" component.

[0071] When a component is referred to as being "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but that there may be other components intervening. Conversely, when a component is referred to as being "directly connected" or "connected" to another component, it should be understood that there are no other components intervening.

[0072] When a component is referred to as being "above" or "below" another component, it should be understood that it is not only positioned directly above that other component, but that there may also be other components intervening there.

[0073] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined herein.

[0074] Hereinafter, a rotary can beading device (1) according to an embodiment of the present invention will be described.

[0075] For convenience of explanation, the center of rotation of the rotary (10) is referred to as the central axis (101), and the center of rotation around which the head (37) that orbits the rotary (10) rotates is referred to as the rotation axis (301).

[0076] Referring to FIGS. 1 to 13, the overall structure is described. The rotary can beading device (1) includes a rotary (10) that rotates about a central axis (101).

[0077] The above rotary (10) has an outer rotary (12) and an inner rotary (14) that are concentric, and includes a support rotary (16) provided radially between them. The outer rotary (12) and the inner rotary (14) can rotate at the same rotational speed.

[0078] A lower frame (80) is installed around the lower circumference of the above rotary (10) to support the rotation of the above rotary (10). The above lower frame (80) and the support rotary (16) are maintained in a firmly fixed state so as to support the rotation of the outer rotary (12) and the inner rotary (14).

[0079] A rotary can beading device (1) includes a plurality of arms (20) arranged along the circumference of the rotary (10) and extending radially so as to rotate together with the rotary (10). An embodiment exemplifies that eight arms (20) are installed at equal intervals along the circumference of the outer rotary (12).

[0080] The above arm (20) is provided with a spindle support (21). The spindle support (21) rotatably supports a spindle (30) via a bearing (22). The spindle (30) is rotatably installed on the spindle support (21) about an axis of rotation (301).

[0081] The above spindle (30) includes a cylindrical housing (31) extending vertically, a sleeve (33) inserted into the interior of the housing (31), and a shaft (34) extending vertically and inserted into the sleeve (33).

[0082] The housing (31) and sleeve (33) are fixed as one piece and rotate together. The shaft (34) is rotationally constrained to the sleeve (33) and rotates together with the sleeve (33). The shaft (34) is inserted into the sleeve (33) so as to be able to slide axially. The embodiment exemplifies that the shaft (34) has a substantially regular hexagonal cross-section and a hole of a corresponding shape is formed in the sleeve (33), so that they are mutually rotationally constrained but axially slide freely.

[0083] A head (37) is connected to the lower end of the shaft (34). The head (37) is connected to the shaft (34) so ​​as to rotate together with the shaft (34) and rise and fall together with the shaft (34). The head (37) supports the open end provided at the upper end of the side wall member of the can (2), transmits rotational force to the can (2), and rotates together with the can (2).

[0084] An upper frame (70) is provided on the upper portion of the above rotary (10). The upper frame (70) is installed so as to be maintained in a rigidly fixed state. An upper rail cam (71) having a head height profile extending in the circumferential direction with respect to the central axis (101) of the rotary (10) is installed on the lower portion of the above upper frame (70).

[0085] A shaft support member (24) is installed at the upper end of the shaft (34) to support the shaft (34) so ​​that it can rotate, but restrains the shaft (34) in the axial direction.

[0086] In the above arm (20), a shaft elevation guide (23) is installed to guide and support the elevation of the shaft support member (24). The shaft support member (24) can ascend and descend along the shaft elevation guide (23), and accordingly, the shaft (34) can also ascend and descend together.

[0087] On the upper portion of the shaft support member (24), a head cam follower (35) that ascends and descends together with the shaft (34) of the spindle (30) is installed. The head cam follower (35) revolves around the central axis (101) of the rotary (10) and follows the head height profile, and accordingly, the shaft (34) and the head (37) connected to the lower end of the shaft (34) ascend and descend together.

[0088] At the lower portion of the upper frame (70), an upper rail (77) extending in the circumferential direction with respect to the central axis (101) is further installed. At the upper portion of the shaft support member (24), a head roller (39) is further installed that ascends and descends together with the shaft (34) of the spindle (30) and follows the upper rail (77).

[0089] The upper rail (77) and the upper rail cam (71) are provided at different positions in the radial direction of the central axis (101). In the embodiment, the upper rail (77) is exemplified as being positioned radially inward of the upper rail cam (71).

[0090] Likewise, the head roller (39) and the head cam follower (35) are provided at different positions in the radial direction of the central axis (101). In the embodiment, the head roller (39) is exemplified as being positioned radially inward relative to the head cam follower (35).

[0091] In the head lifting section in the circumferential direction, the height of the head (37) is determined by the upper rail cam (71). And in the head travel section that does not overlap with the head lifting section in the circumferential direction, the height of the head (37) is determined by the upper rail (77).

[0092] For example, in the head lifting section, the head cam follower (35) contacts the upper rail cam (71) and reflects the head height profile to the height of the head (37), and in the head traveling section, the head roller (39) contacts the upper rail (77) and maintains the height of the head (37) constant.

[0093] The above rotary can beading device (1) includes a plurality of can tables (60) arranged along the circumference of the rotary (10) and extending radially so as to rotate together with the rotary (10). In the embodiment, eight can tables (60) are installed at equal intervals along the circumferential direction on the outer rotary (12).

[0094] A table lifting guide (121) extending vertically is provided on the outer periphery of the outer rotary (12), and the eight can tables (60) are each guided to be lifted along the table lifting guide (121).

[0095] On the radially outer side of the can table (60), a can holder (61) is installed on the can table (60) so as to rotate about the central axis (101) together with the can table (60).

[0096] The can holder (61) is aligned with the head (37) in the vertical direction. In addition, the can holder (61) is installed to freely rotate with respect to the can table (60) about the rotation axis (301) of the head (37). The can holder (61) rotates in response to the rotational force of the head (37).

[0097] A lower rail cam (81) is installed in the lower frame (80). The lower rail cam (81) has a can height profile extending in the circumferential direction with respect to the central axis (101) of the rotary (10).

[0098] At the bottom of the can table (60), a can cam follower (62) that rises and falls together with the can table (60) is installed. The can cam follower (62) revolves around the central axis (101) of the rotary (10) and follows the can height profile, thereby causing the can table (60) to rise and fall together, thereby adjusting the height of the can support (61).

[0099] On the above lower frame (80), a lower rail (85) extending in the circumferential direction with respect to the central axis (101) is further installed. In addition, on the lower portion of the can table (60), a can roller (63) that rises and falls together with the can table (60) and follows the lower rail (85) is further installed.

[0100] The lower rail (85) and the lower rail cam (81) are provided at different positions in the radial direction of the central axis (101). In the embodiment, the lower rail (85) is exemplified as being positioned radially inward of the lower rail cam (81).

[0101] Likewise, the can roller (63) and the can cam follower (62) are provided at different positions in the radial direction of the central axis (101). In the embodiment, the can roller (63) is exemplified as being positioned radially inward relative to the can cam follower (62).

[0102] In the can lifting section in the circumferential direction, the height of the can table (60) can be determined by the lower rail cam (81). And in the can traveling section that does not overlap with the can lifting section in the circumferential direction, the height of the can table (60) is determined by the upper rail (77).

[0103] For example, in the can lifting section, the can cam follower (62) contacts the lower rail cam (81) and reflects the can height profile to the height of the can support (61), and in the can traveling section, the can roller (63) contacts the lower rail (85) and maintains the height of the can support (61) constant.

[0104] The above rotary can beading device (1) includes a beading knife (40) installed on each of the arms (20).

[0105] The above beading knife (40) is rotatably supported by a knife support shaft (42) installed on a knife support (41). The above beading knife (40) is extrapolated to the knife support shaft (42) so that relative movement in the axial direction with respect to the knife support shaft (42) is restricted, but relative rotation is permitted.

[0106] The arm (20) supports the knife support (41) so that the knife support (41) can move toward or away from the rotation axis (301) of the head (37). In the embodiment, a knife movement guide (25) is provided on the arm (20) to support the knife support (41) so that the knife support (41) can slide in the radial direction of the rotation axis (301). The knife movement guide (25) is provided on the arm (20) inward of the spindle support (21) in the radial direction of the central axis (101).

[0107] On the upper portion of the above support rotary (16), a knife rail cam (17) having a knife radial position profile (172) extending circumferentially with respect to the central axis (101) is installed. For example, the knife radial position profile (172) may have a circular trajectory eccentrically arranged with respect to the central axis (101).

[0108] The above knife movement guide (25) is provided on the arm (20) outside the knife rail cam (17) in the radial direction of the central axis (101).

[0109] A knife cam follower (43) is installed on the knife support (41) to move radially with the beading knife (40) about the rotation axis (301) and to follow the knife radial position profile (172) to adjust the radial distance of the beading knife (40) with respect to the rotation axis (301) of the spindle (30).

[0110] The above rotary can beading device (1) is positioned opposite the beading knife (40) with the rotation axis (301) in between and includes support rollers (50) each installed on the arm (20).

[0111] The above support roller (50) is rotatably supported by a roller support shaft (52) installed on a roller support (51). The support roller (50) is extrapolated to the roller support shaft (52) so that relative movement in the axial direction with respect to the roller support shaft (52) is restricted, but relative rotation is permitted.

[0112] The arm (20) supports the roller support (51) so that the roller support (51) can move toward or away from the rotation axis (301) of the head (37). In the embodiment, a roller movement guide (26) is provided on the arm (20) to support the roller support (51) so that the roller support (51) can slide in the radial direction of the rotation axis (301). The roller movement guide (26) is provided on the arm (20) on the outer side of the spindle support (21) in the radial direction of the central axis (101). For reference, the shaft elevation guide (23) is provided between the spindle support (21) and the roller movement guide (26) in the radial direction.

[0113] The lower frame (80) is provided with a middle table (86) that extends radially outward from the head (37) with respect to the central axis (101) to a height corresponding to the head (37).

[0114] A support rail cam (87) having a support roller radial position profile (871) extending circumferentially about the central axis (101) is installed on the above middle table (86). For example, the support roller radial position profile (871) may have an arc trajectory that is eccentrically arranged about the central axis (101).

[0115] The above roller movement guide (26) is provided on the arm (20) in the radial direction of the central axis (101) and inward from the support rail cam (87).

[0116] In the above roller support (51), a support cam follower (53) is installed that moves radially with the support roller (50) about the rotation axis (301) and follows the support roller radial position profile (871) to adjust the radial distance of the support roller (50) with respect to the rotation axis (301) of the spindle (30).

[0117] The above rotary can beading device (1) includes a plurality of spindle drive supports (141) arranged along the circumference of the rotary (10) and extending radially so as to rotate together with the rotary (10). In the embodiment, eight spindle drive supports (141) are installed at equal intervals along the circumferential direction on the inner rotary (14). The spindle drive supports (141) are aligned with the arm (20) in the radial direction of the central axis (101).

[0118] A spindle drive unit (143) is installed on the above spindle drive support (141). The spindle drive unit (143) is positioned radially further inward of the central axis (101) than the spindle (30).

[0119] The spindle drive unit (143) includes a drive motor (145) that generates rotational force and a drive gear (147) that rotates by the drive motor (145). The rotational axis of the drive gear (147) is arranged parallel to the rotational axis of the spindle (30). A driven gear (32) that rotates integrally with the housing (31) and meshes with the drive gear (147) is provided on the upper portion of the housing (31) of the spindle (30). The spindle drive unit (143) rotates the spindle (30) in a section where rotation of the spindle (30) is required in the circumferential direction of the rotary (10).

[0120] The above rotary can beading device (1) experiences wear and tear on the bearing (22) and beading knife (40) over time, requiring correction. Furthermore, the spindle (30) that rotates all heads (37) also experiences wear and deformation over time.

[0121] According to the present invention, the dimensions of cans after beading are measured and accumulated as data, and the changing trends of such data are analyzed. Accordingly, it is possible to determine whether forming errors occur due to common wear of all spindles (30) and whether forming errors occur due to wear of the bearings (22) or beading knives (40) of individual heads (37).

[0122] The automatic correction system of the above rotary can beading device (1) classifies the items that must be corrected simultaneously for all heads (37) and the items that must be corrected individually from the data trend as above, and calculates the degree of correction that must be performed for each.

[0123] And the above automatic correction system performs automatic correction according to the above-described calculation results.

[0124] Referring to Fig. 14, in order to enable fine correction of the height of all heads (37), the rotary can beading device (1) operates the upper servo motor (73) installed in the upper frame (70) to adjust the height of the upper rail cam (71). Since the upper rail cam (71) is configured to be followed by the head cam follower (35) of all spindles (30), when the vertical height of the upper rail cam (71) is adjusted, the heights of all heads (37) are corrected together.

[0125] At this time, if the direction of elevation of the upper rail cam (71) is determined by the direction of rotation of the upper servo motor (73), and the height of elevation of the upper rail cam (71) is determined by the number of rotations of the upper servo motor (73), the rotation direction and number of rotations of the upper servo motor (73) required for height correction of all heads (37) are calculated, and the upper servo motor (73) is controlled based on this, thereby enabling fine height correction of the entire head (37).

[0126] A monitoring unit (79) that obtains height information of the head (37) may be installed in the upper frame (70). The monitoring unit (79) may detect the height of the head (37) using a vision inspection method or various other methods. When the height of the upper rail cam (71) changes by the upper servo motor (73), the height of the head cam follower (35) also changes accordingly. The monitoring unit (79) detects and verifies the height of the head cam follower (35), thereby enabling more precise correction.

[0127] The upper rail cam (71) is installed so as to be able to rise and fall on the upper frame (70), and the upper servo motor (73) is also installed on the upper frame (70), which is the same component. Accordingly, the height of the upper rail cam (71) can be accurately corrected.

[0128] The upper frame (70) is provided with an upper rail elevation guide (72) that guides the elevation of the upper rail cam (71). The upper rail cam (71) is restricted from moving in the radial and circumferential directions with respect to the upper rail elevation guide (72), but is permitted to move up and down.

[0129] The upper servo motor (73) above rotates the ball screw (731) at a controlled rotational speed, and the slider (74) connected to the ball screw (731) in the form of a ball nut moves forward and backward along the longitudinal direction of the ball screw (731) in conjunction with the rising and falling motions of the upper rail cam (71).

[0130] The above slider (74) and rail cam have a pair of sliding inclined surfaces (741) whose heights change in the up-down direction with respect to the longitudinal direction of the ball screw (731), and as the pair of sliding inclined surfaces (741) slide, the forward and backward movements are linked with the upward and downward movements. Accordingly, the sliding distance of the slider (74) and the elevation distance of the upper rail cam (71) become proportional. In addition, the sliding distance of the slider (74) is determined by the rotation speed of the servo motor. Accordingly, the elevation distance of the upper rail cam (71) can be determined by the rotation speed of the servo motor.

[0131] The above automatic correction can also be applied to the height of the can. The height of the can may also change due to wear of the bearing (22) of the can support (61) that rotates freely with respect to the can table (60) and wear of the can cam follower (62).

[0132] Referring to Fig. 15, in order to enable fine correction of the height of the entire can holder (61), the rotary can beading device (1) operates the lower servo motor (83) installed in the lower frame (80) to adjust the height of the lower rail cam (81). Since the lower rail cam (81) is configured to be followed by the can cam followers (62) of all can tables (60), when the upper and lower heights of the lower rail cam (81) are adjusted, the heights of all can holders (61) are corrected together. The lower rail cam (81) is adjusted in height by the operation of the lower servo motor (83). Since this correction principle is similar to that of the upper servo motor (73) above, a duplicate description will be omitted.

[0133] Referring to FIGS. 16 to 22 below, a structure for adjusting the height of an individual head (37) is described.

[0134] As illustrated in Fig. 14, an adjustment servo motor (75) is installed at a predetermined position of the upper frame (70) to adjust the height of the individual head (37). Accordingly, the head (37) requiring individual head (37) height correction can be moved to the position where the adjustment servo motor (75) is installed by the rotation of the rotary (10).

[0135] The head cam follower (35) can have its relative height with respect to the shaft (34) adjusted by the rotation of the adjusting shaft (351), which changes the relative height of the head cam follower (35) with respect to the shaft (34) depending on the rotation angle. That is, the relative height of the head cam follower (35) with respect to the shaft support member (24) is adjusted depending on the rotation angle of the adjusting shaft (351).

[0136] For example, as illustrated in FIGS. 21 and 22, the control shaft (351) can be rotated up to 90 degrees, and when the control shaft (351) is rotated 45 degrees to the left, the head cam follower (35) can be relatively raised further, and when the control shaft (351) is rotated 45 degrees to the right, the head cam follower (35) can be relatively lowered further. Then, as illustrated in FIGS. 19 and 20, the control servo motor (75) located at a position retracted from the control shaft (351) is brought close to the control shaft (351) and coupled so as to be mutually rotationally constrained, and the rotation angle of the control servo motor (75) can be controlled to precisely control the rotation angle of the control shaft (351).

[0137] The angular position of the above-mentioned adjustment shaft (351) is linked to the elevation of the head cam follower (35). Therefore, when the position of the head cam follower (35) is adjusted by the adjustment shaft (351), the adjustment shaft (351) must be fixed. Accordingly, the adjustment shaft (351) can be fixed to allow rotation or not to allow rotation by the lock control unit (352).

[0138] This lock control unit (352) also needs to be operated automatically. In order to automatically control the operation of the lock control unit (352), the embodiment comprises a lock nut (353) that locks or unlocks the adjusting shaft (351) depending on the rotation direction, and a nut runner (76) that is installed so as to be able to approach and retract from the lock nut (353) so as to rotate the lock nut (353).

[0139] Accordingly, the locking and unlocking operations of the lock nut (353) can also be automated by the nut runner (76), and the adjustment of the adjustment shaft (351) can also be precisely performed by precisely controlling the rotational direction and rotational speed of the adjustment servo motor (75).

[0140] Accordingly, first, as shown in FIG. 16, the nut runner (76) approaches the lock nut (353), and as shown in FIG. 17, the lock nut (353) is released, and as shown in FIG. 18, the rotational axis of the adjustment servo motor (75) is engaged with the adjustment shaft (351) so as to be rotationally constrained, and as shown in FIG. 19, the adjustment shaft (351) is rotated by the adjustment servo motor (75) by a required amount to adjust the position of the head cam follower (35) to the correction position, and then, while the adjustment servo motor (75) is engaged with the adjustment shaft (351), the lock nut (353) is locked again with the nut runner (76), so that the height of the head cam follower (35) can be automatically adjusted.

[0141] Once the above automatic correction is complete, the can can be formed and its dimensions measured to quickly verify that the correction was as intended.

[0142] 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 rotary rotating about a central axis; A plurality of arms arranged along the circumference of the rotary and extending radially so as to rotate with the rotary; A head installed so as to be rotatable about an axis of rotation on each of the above arms and so as to be slidable in the axial direction; A beading knife installed on each of the arms so as to be movable toward or away from the rotation axis; A support roller positioned opposite the beading knife with the above-mentioned axis interposed therebetween; A first rail cam having a first height profile extending circumferentially about the central axis; and A first cam follower that ascends and descends together with the head and adjusts the height of the head by following the first height profile; The above first rail cam is a rotary can beading device whose height is adjusted by the operation of the first servo motor.

2. A rotary can beading device according to claim 1, wherein the elevation direction of the first rail cam is determined by the rotational direction of the first servo motor, and the elevation height of the first rail cam is determined by the rotational speed of the first servo motor.

3. A rotary can beading device according to claim 1, further comprising a monitoring unit that acquires height information of the head.

4. A rotary can beading device according to claim 1, wherein the first rail cam is installed so as to be able to rise and fall on the first frame, and the first servo motor is installed on the first frame.

5. In claim 4, the first frame has a first rail lifting guide that guides the lifting of the first rail cam, A rotary can beading device in which the first servo motor rotates the ball screw at a controlled rotational speed, and a slider connected to the ball screw in the form of a ball nut moves forward and backward along the longitudinal direction of the ball screw, and the upward and downward movements of the first rail cam are linked.

6. In claim 5, the slider and the first rail cam have a pair of sliding inclined surfaces whose heights change in the vertical direction with respect to the longitudinal direction of the ball screw, A rotary can beading device, wherein the forward and backward motions are linked with the upward and downward motions as the pair of said sliding surfaces are moved together.

7. In claim 1, a plurality of can tables arranged along the circumference of the rotary and extending radially so as to rotate together with the rotary; A can stand provided on the radially outer side of the can table so as to rotate together with the can table, and installed rotatable relative to the can table about the rotation axis; and A second rail cam having a second height profile extending circumferentially about the central axis; and Further comprising a second cam follower that rises and falls together with the can holder and adjusts the height of the can holder by following the second height profile; The above second rail cam is a rotary can beading device whose height is adjusted by the operation of the second servo motor.

8. A rotary can beading device according to claim 7, wherein the elevation direction of the second rail cam is determined by the rotational direction of the second servo motor, and the elevation height of the second rail cam is determined by the rotational speed of the second servo motor.

9. A rotary can beading device according to claim 7, wherein the rotation direction and rotation speed of the second servo motor are complementary to the rotation direction and rotation speed of the first servo motor.

10. In claim 7, the second rail cam is installed so as to be able to ascend and descend on the second frame, The above second servo motor is a rotary can beading device installed on the above second frame.

11. In claim 1, the first cam follower has a height relative to the head adjusted by rotation of an adjustment shaft that changes the relative height of the first cam follower relative to the head depending on the rotation angle. The above-mentioned adjustment shaft is fixed so that rotation is permitted or not permitted by the lock control unit, A rotary can beading device in which the rotation angle of the above-mentioned control shaft is controlled by a third servo motor installed so as to be approachable and retractable relative to the above-mentioned control shaft.

12. A rotary can beading device according to claim 11, wherein the locking control unit includes a lock nut that locks or unlocks the adjusting shaft depending on the direction of rotation, and a nut runner that is installed to be approachable and retractable relative to the lock nut so as to rotate the lock nut.

13. In claim 11, the third servo motor is a rotary can beading device installed in the first frame.

14. A rotary can beading device according to claim 12, wherein the nut runner is installed on the first frame.

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