JP2022092854A - Can body manufacturing apparatus and can body manufacturing method - Google Patents

Abstract

To provide a can body manufacturing apparatus and a can body manufacturing method which can sufficiently correct distortion of an opening shape of a body, and can suppress increase in work time.SOLUTION: A can body manufacturing apparatus 100 includes a gripping part 3, and a first correction jig 51. The holding part 3 has a semi-circular shape along a first semi-cylindrical part B1 of a body B. The first correction jig 51 can insert the body B and a first end plate H1 thereinto. The first correction jig 51 can hold the first end plate H1. The inner periphery of the first correction jig 51 has a shape along a second semi-cylindrical part B2 of the body B. The gripping part 3 is configured to grip the body B by adsorbing the first semi-cylindrical part B1 of the body B. The gripping part 3 is configured to cause the body B to abut on the first end plate H1 in a state in which the second semi-cylindrical part B2 is in contact with the inner periphery of the first correction jig 51.SELECTED DRAWING: Figure 5

Description

The present disclosure relates to a can body manufacturing apparatus and a method for manufacturing a can body.

Hot water storage type water heaters that have become widespread in recent years are equipped with a large-capacity metal hot water storage tank for storing heated hot water. The hot water storage tank generally includes a fuselage and end plates welded (peripheral welded) to both ends of the fuselage. The body is a tubular member. The end plate is a bowl-shaped member. For peripheral welding of the fuselage and end plate, welding methods have been conventionally studied from the viewpoint of joints of various shapes, can body manufacturing equipment, and the like. In order to extend the life of the can body, it is desirable to weld a so-called butt joint in which a gap is not provided between the body and the end plate. In general, in butt welding of thin plates, it is necessary to strictly control the gap between joints and the displacement in the plate thickness direction. The above-mentioned displacement is the difference between the body and the end plate, that is, the displacement in the thickness direction of the two plates (the body plate and the end plate). For example, Japanese Patent Application Laid-Open No. 8-224693 (Patent Document 1) describes a peripheral welding device (can body manufacturing device) for sandwiching a body body between a first member and a second member.

Japanese Unexamined Patent Publication No. 8-224693

However, in the can body manufacturing apparatus (peripheral welding apparatus) described in the above document, the opening of the end portion of the fuselage can be achieved only by sandwiching the fuselage (body portion) by a plurality of grip portions (first member and second member). The distortion of the shape cannot be sufficiently corrected. Therefore, when the body is sandwiched between the plurality of grips, it is necessary to attach a screwing means for screwing the plurality of grips and an urging means for urging the plurality of grips. In addition, it is necessary to remove the screwing means and the urging means before welding. That is, it is necessary to use an additional jig. Therefore, in the can body manufacturing apparatus described in the above document, the working time increases when trying to correct the distortion of the opening shape of the body.

The present disclosure has been made in view of the above problems, and an object thereof is to manufacture a can body manufacturing apparatus and a can body capable of sufficiently correcting distortion of the opening shape of the body and suppressing an increase in working time. Is to provide a method.

The can body manufacturing apparatus of the present disclosure is a can body manufacturing apparatus for manufacturing a can body. The can body includes a body and a first end plate. The fuselage has a first semi-cylindrical portion and a second semi-cylindrical portion. The second semi-cylindrical portion faces the first semi-cylindrical portion. The first end plate is joined to the fuselage. The can body manufacturing apparatus includes a grip portion and a first straightening jig. The grip portion has a semicircular shape along the first semi-cylindrical portion of the body. The body and the first end plate can be inserted into the first orthodontic jig. The first orthodontic jig can hold the first end plate. The inner circumference of the first straightening jig has a shape along the second semi-cylindrical portion of the body. The grip portion is configured to grip the fuselage by adsorbing the first semi-cylindrical portion of the fuselage. The grip portion is configured so that the body is abutted against the first end plate in a state where the second semi-cylindrical portion is in contact with the inner circumference of the first straightening jig.

According to the can body manufacturing apparatus of the present disclosure, the gripping portion is configured to grip the fuselage by adsorbing the first semi-cylindrical portion of the body. Therefore, it is possible to correct the distortion of the opening shape of the first semi-cylindrical portion. Further, the grip portion is configured so that the body is abutted against the first end plate in a state where the second semi-cylindrical portion is in contact with the inner circumference of the first straightening jig. Therefore, it is possible to correct the distortion of the opening shape of the second semi-cylindrical portion. Therefore, it is possible to sufficiently correct the distortion of the opening shape of the body. Further, the grip portion is configured to grip the fuselage by adsorbing the first semi-cylindrical portion of the fuselage. Therefore, it is not necessary to use an additional jig for fixing the plurality of grips to each other. Therefore, it is possible to suppress an increase in working time.

It is a side view which shows roughly the structure of the can body manufacturing apparatus which concerns on Embodiment 1. FIG. It is an end view along the line II-II of FIG. FIG. 5 is an end view schematically showing a state in which the can body manufacturing apparatus according to the first embodiment grips the can body. The body of the can body was supported by the support portion of the can body manufacturing apparatus according to the first embodiment, the first end plate was held by the first correction jig, and the second end plate was held by the second correction jig. It is a side view which shows the state roughly. The body of the can body was supported by the support portion of the can body manufacturing apparatus according to the first embodiment, the first end plate was held by the first correction jig, and the second end plate was held by the second correction jig. It is sectional drawing which shows the state schematicly. It is sectional drawing which shows typically the state that the body of the can body was inserted into the 1st straightening jig and the 2nd straightening jig of the can body manufacturing apparatus which concerns on Embodiment 1. FIG. It is sectional drawing which shows typically the appearance that the 1st straightening jig and the 2nd straightening jig of the can body manufacturing apparatus which concerns on Embodiment 1 moved away from the body of a can body. It is a perspective view schematically showing the structure of the 1st straightening jig of the can body manufacturing apparatus which concerns on Embodiment 1. FIG. It is a perspective view schematically showing the structure of the 2nd straightening jig of the can body manufacturing apparatus which concerns on Embodiment 1. FIG. It is sectional drawing which shows typically the appearance that the welding machine of the can body manufacturing apparatus which concerns on Embodiment 1 is arranged above the can body. It is an enlarged view of the XI area of FIG. FIG. 5 is an enlarged view schematically showing another configuration of a grip portion of the can body manufacturing apparatus according to the first embodiment. It is a flowchart which shows the structure of the manufacturing method of the can body which concerns on Embodiment 1. FIG. 5 is an end view schematically showing how the gripping portion of the can body manufacturing apparatus according to the first embodiment tries to grip the distorted body of the can body. FIG. 5 is an end view schematically showing a state in which the grip portion of the can body manufacturing apparatus according to the first embodiment corrects the body body by gripping the body body of the can body. It is a side view which shows roughly the structure of the can body manufacturing apparatus which concerns on Embodiment 2. It is an end view along the XVII-XVII line of FIG. It is sectional drawing which shows schematic the structure of the can body manufacturing apparatus which concerns on Embodiment 2.

Hereinafter, embodiments will be described with reference to the drawings. In the following, the same or corresponding parts will be designated by the same reference numerals, and duplicate explanations will not be repeated.

Embodiment 1.
The configuration of the can body manufacturing apparatus 100 according to the first embodiment will be described with reference to FIGS. 1 to 12. As shown in FIG. 1, the can body manufacturing apparatus 100 is a can body manufacturing apparatus 100 for manufacturing a can body V.

The can body V includes a body B, a first end plate H1, and a second end plate H2. The first end plate H1 is joined to the body B. The second end plate H2 is arranged so as to sandwich the body B with the first end plate H1. The fuselage B has a first semi-cylindrical portion B1 and a second semi-cylindrical portion B2. Each of the first semi-cylindrical portion B1 and the second semi-cylindrical portion B2 has a semi-cylindrical shape. The first semi-cylindrical portion B1 and the second semi-cylindrical portion B2 integrally form a cylindrical shape. The second semi-cylindrical portion B2 faces the first semi-cylindrical portion B1. In the present embodiment, the first semi-cylindrical portion B1 is arranged above the second semi-cylindrical portion B2. In FIG. 1, the outer shapes of the first end plate H1 and the second end plate H2 are shown by broken lines. The boundary between the first semi-cylindrical portion B1 and the second semi-cylindrical portion B2 is indicated by a two-dot chain line.

The can body V is used, for example, in a metal hot water storage tank of a hot water storage type water heater. The outer diameters of the body B, the first end plate H1 and the second end plate H2 are, for example, 300 mm or more and 700 mm or less. The material of the can body V is, for example, a ferritic stainless steel material. The plate thickness of the can body V is, for example, 0.5 mm or more and 1.5 mm or less. The total length of the can body V in the direction in which the first end plate H1 and the second end plate H2 sandwich the can body V is, for example, 500 mm or more and 2000 mm or less.

In the present embodiment, the first direction DR1 is the direction in which the first end plate H1 and the second end plate H2 sandwich the body B. The second direction DR2 is the direction of gravity. The third direction DR3 is a direction orthogonal to the first direction DR1 and the second direction DR2.

The can body manufacturing apparatus 100 includes a grip portion 3, a first straightening jig 51, and a second straightening jig 52. In the present embodiment, the can body manufacturing apparatus 100 includes a base portion 1, a support portion 2, a holding unit 4, a pressurizing unit 6, a rotary drive portion 71, a first shaft 72, a gear 73, a motor 74, and a rotary driven portion 75. Further includes a slide rail 76, a second shaft 77, a welder 8 and a control unit CU.

A support portion 2, a holding unit 4, a pressurizing unit 6, a rotary drive portion 71, and a slide rail 76 are arranged on the base portion 1.

The support portion 2 is configured to support the can body V. Specifically, the support portion 2 is configured to support the second semi-cylindrical portion B2 of the body B. In the present embodiment, the support portion 2 includes a first support portion 21 and a second support portion 22. The first support portion 21 and the second support portion 22 are arranged at intervals along the first direction DR1.

The grip portion 3 is configured to grip the can body V supported by the support portion 2. Specifically, the grip portion 3 is configured to grip the first semi-cylindrical portion B1 of the body B supported by the support portion 2. In the present embodiment, the grip portion 3 includes a first grip portion 31 and a second grip portion 32. The first grip portion 31 and the second grip portion 32 are arranged along the longitudinal direction of the body B (first direction DR1). The first gripping portion 31 is configured to grip the body B on the side of the first end plate H1 with respect to the center of the body B along the first direction DR1. The second gripping portion 32 is configured to grip the body B on the side of the second end plate H2 with respect to the center of the body B along the first direction DR1.

As shown in FIGS. 2 and 3, the grip portion 3 is configured to grip the fuselage B by adsorbing the first semi-cylindrical portion B1 of the body B. In the present embodiment, the grip portion 3 is configured to grip the body B by sucking the first semi-cylindrical portion B1 of the body B from above along the second direction DR2.

As will be described later, the grip portion 3 may attract the first semi-cylindrical portion B1 by vacuum suction by a plurality of vacuum pads, or may attract the first semi-cylindrical portion B1 by the electromagnetic force of a plurality of electromagnets. good. The configuration for the grip portion 3 to adsorb the first semi-cylindrical portion B1 is not limited to these, and may be appropriately determined. Further, the direction in which the grip portion 3 attracts the first semi-cylindrical portion B1 of the body B is not limited to the upper side along the second direction DR2, and may be appropriately determined.

The grip portion 3 has a semicircular shape along the first semi-cylindrical portion B1 of the body B. The grip portion 3 includes a semicircular portion 35. The semicircular portion 35 is open toward the body B. The semi-circular portion 35 has a semi-circular shape along the first semi-cylindrical portion B1 of the body B. The diameter (inner diameter) of the inner circumference of the semicircular portion 35 is equal to the outer diameter of the body B. In the present embodiment, when the semicircle portion 35 is attached to the body B, the angle at which the semicircle portion 35 is open with respect to the center of the body B is 180 degrees.

The grip portion 3 may include a first extension portion 36 and a second extension portion 37. Each of the first extension portion 36 and the second extension portion 37 is connected to both ends of the semicircular portion 35, respectively. The first extension portion 36 and the second extension portion 37 extend from both ends of the semicircle portion 35 along the second direction DR2, respectively. In the present embodiment, the distance between the first extension portion 36 and the second extension portion 37 is equal to the body B.

The grip portion 3 has a first end portion E1 and a second end portion E2. In the present embodiment, the first end portion E1 and the second end portion E2 are the first end portion E1 and the second end portion E2 along the direction in which the first end portion E1 and the second end portion E2 sandwich the body B. It is configured to widen the distance from and toward the tip. That is, the grip portion 3 has a tapered shape. In the present embodiment, the first end portion E1 is connected to the first extension portion 36. The second end E2 is connected to the second extension 37. The support portion 2 is provided with a V-shaped recess for supporting the body B. In side view, the fuselage B is supported by two points of recess.

The grip portion 3 is configured to move along the second direction DR2 by the holding unit 4. As shown in FIG. 4, the holding unit 4 includes two connection plates 41, two height position adjustment stages 42, two horizontal position adjustment stages 43, a height position drive unit 44, and a horizontal position drive. A portion 45, a frame 46, and a connecting portion 47 are included.

Each of the first grip portion 31 and the second grip portion 32 of the grip portion 3 is connected to each of the two height position adjusting stages 42 by each of the two connecting plates 41. The grip portion 3 is configured to be removable from the connection plate 41. Further, the grip portion 3 is configured to be replaceable. Therefore, the first grip portion 3 connected to the connection plate 41 can be replaced with a second grip portion 3 having an inner diameter different from the inner diameter of the first grip portion 3. As a result, the can body manufacturing apparatus 100 has a first body B that can be gripped by the first grip portion 3 and an outer diameter different from the outer diameter of the first body B, and the second grip portion 3 It can correspond to the second body B that can be gripped by.

Each of the two height position adjustment stages 42 is connected to each of the two horizontal position adjustment stages 43. Each of the two horizontal position adjusting stages 43 is connected to the height position driving unit 44 by a connecting portion 47. The height position drive unit 44 is configured to move each of the two horizontal position adjustment stages 43 along the second direction DR2 (height direction). The height position drive unit 44 is connected to the horizontal position drive unit 45. The horizontal position drive unit 45 is configured to move the height position drive unit 44 along the first direction DR1. The horizontal position drive unit 45 is connected to the frame 46. The frame 46 is fixed to the base portion 1. The frame 46 is configured in a gate shape, for example.

The position of the grip portion 3 is adjusted by moving each of the height position drive unit 44 and the horizontal position drive unit 45 along each of the second direction DR2 and the first direction DR1.

Each of the first grip portion 31 and the second grip portion 32 is configured such that the height position drive portion 44 moves by moving each of the two horizontal position adjustment stages 43 along the second direction DR2. ing. The first grip portion 31 and the second grip portion 32 are configured such that the horizontal position drive portion 45 moves along the first direction DR1 by moving the height position drive portion 44 along the first direction DR1. Has been done. The first grip portion 31 and the second grip portion 32 are configured to move toward or away from each other. As a result, the positions of the first grip portion 31 and the second grip portion 32 of the grip portion 3 are freely adjusted along each of the first direction DR1 and the second direction DR2. Further, the first grip portion 31 and the second grip portion 32 are maintained in a state where the distance between the first grip portion 31 and the second grip portion 32 along the first direction DR1 is maintained, and the first direction DR1 and the second grip portion 32 are maintained. You can move along each of the DR2s.

As shown in FIG. 5, the first semi-cylindrical portion B1 and the second semi-cylindrical portion B2 of the can body V have a tubular portion C0, a first connection portion C11, a second connection portion C12, and a first large diameter portion C21. And the second large diameter portion C22 is included. The tubular portion C0 has a cylindrical shape. The tubular portion C0 is connected to the first large diameter portion C21 by the first connecting portion C11. The tubular portion C0 is connected to the second large diameter portion C22 by the second connecting portion C12. The outer diameters of the first large diameter portion C21 and the second large diameter portion C22 are larger than those of the tubular portion C0.

The first end plate H1 includes a first standing portion H11, a first cylindrical portion H12, and a first cup portion H13. The first upright portion H11 is configured to stand up from the first tubular portion H12. The outer diameter of the first upright portion H11 is larger than the outer diameter of the first tubular portion H12. The first cup portion H13 sandwiches the first tubular portion H12 with the first standing portion H11. The first cup portion H13 is configured as the tip of the can body V.

The second end plate H2 includes a second upright portion H21, a second tubular portion H22, and a second cup portion H23. The second upright portion H21 is configured to stand up from the second tubular portion H22. The outer diameter of the second upright portion H21 is larger than the outer diameter of the second tubular portion H22. The second cup portion H23 sandwiches the second tubular portion H22 with the second upright portion H21. The second cup portion H23 is configured as the tip of the can body V.

The first straightening jig 51 and the second straightening jig 52 are arranged so as to sandwich the grip portion 3 along the first direction DR1. In FIG. 5, the first bottom plate 511 and the first cup portion H13, which will be described later, of the first straightening jig 51 are arranged apart from each other. Thereby, it is possible to prevent the first cup portion H13 from coming into contact with the first bottom plate 511 before the first upright portion H11 and the first tubular portion H12 sufficiently come into contact with the first straightening ring 512. Therefore, the first standing portion H11 and the first tubular portion H12 can be sufficiently brought into contact with the first straightening ring 512. The distance S between the first bottom plate 511 and the first cup portion H13 is, for example, 1 mm or more and 2 mm or less. The second bottom plate 521 and the second cup portion H23, which will be described later, of the second straightening jig 52 are arranged apart from each other. The distance between the second bottom plate 521 and the second cup portion H23 is, for example, 1 mm or more and 2 mm or less.

As shown in FIGS. 5 and 6, the first straightening jig 51 and the second straightening jig 52 are movable along the first direction DR1. As a result, the first straightening jig 51 and the second straightening jig 52 are configured to move the first end plate H1 and the second end plate H2 so that the first end plate H1 and the second end plate H2 sandwich the body B. ing.

The first straightening jig 51 and the second straightening jig 52 are configured to pressurize the can body V by sandwiching the can body V in a state where the first end plate H1 and the second end plate H2 are in contact with the body B. There is. The first straightening jig 51 and the second straightening jig 52 are configured to be able to switch between a state in which the can body V is pressed by the first pressing force and a state in which the can body V is pressed by the second pressing force. The first pressing force is, for example, 196 N or more and 294 N or less. The second pressing force is larger than the first pressing force. The second pressing force is, for example, 980 N.

The body B and the first end plate H1 can be inserted into the first straightening jig 51. The first straightening jig 51 can hold the first end plate H1. The first straightening jig 51 can hold the first end plate H1 inserted into the first straightening jig 51. The detailed configuration for the first straightening jig 51 to hold the first end plate H1 will be described later.

The inner circumference of the first straightening jig 51 has a shape along the second semi-cylindrical portion B2 of the body B. In the present embodiment, the inner circumference of the first straightening jig 51 is configured as an inner wall of a cylinder. The diameter (inner diameter) of the inner circumference of the first straightening jig 51 is equal to or larger than the outer diameter of the body B. In the present embodiment, the diameter (inner diameter) of the inner circumference of the first straightening jig 51 is larger than the outer diameter of the body B.

The grip portion 3 is configured so that the body B is abutted against the first end plate H1 in a state where the second semi-cylindrical portion B2 is in contact with the inner circumference of the first straightening jig 51. The grip portion 3 is configured to abut the body B against the first end plate H1 in a state where the second semi-cylindrical portion B2 is straightened along the inner circumference of the first straightening jig 51. The first semi-cylindrical portion B1 is arranged away from the inner circumference of the first straightening jig 51 in a state where the second semi-cylindrical portion B2 is in contact with the inner circumference of the first straightening jig 51.

The first straightening jig 51 includes a first bottom plate 511, a first straightening ring 512, a first annular portion 513, a first peripheral wall portion 514, a first tapered portion 515, a first support plate 516, and a first. It has one cylinder 517, a first guide 518, and a first compression spring 519.

The first bottom plate 511 is configured to receive the bottom surface of the first cup portion H13 of the first end plate H1. The first bottom plate 511 is configured to come into contact with the first cup portion H13 at the contact surface of the first bottom plate 511. The contact surface has a shape that follows the shape of the first cup portion H13. The contact surface has a sufficient area for pressurizing the first cup portion H13. When the first straightening jig 51 and the second straightening jig 52 approach each other in a state where the contact surface is in contact with the first cup portion H13, the first end plate H1, the second end plate H2, and the body B are pressurized.

The first straightening ring 512 is configured so that the first tubular portion H12 and the first cup portion H13 of the first end plate H1 can be inserted. The first straightening ring 512 has a cylindrical shape. The first straightening ring 512 is configured to engage the first upright portion H11 of the first end plate H1. The first straightening ring 512 is configured to come into contact with the back surface of the first upright portion H11 of the first end plate H1 and the side surface of the first tubular portion H12. Specifically, the first straightening ring 512 is configured so that the tip surface of the first straightening ring 512 comes into contact with the back surface of the first standing portion H11 of the first end plate H1. The tip surface of the first straightening ring 512 is configured to sandwich the first upright portion H11 of the first end plate H1 with the first connecting portion C11 of the body B. The tip surface of the first straightening ring 512 is configured to be orthogonal to the longitudinal direction of the can body V (first direction DR1). As a result, the flatness of the first connecting portion C11 and the first standing portion H11, which are the joint portions between the body B and the first end plate H1, is improved. In the present embodiment, the flatness is the degree along the plane direction orthogonal to the longitudinal direction (first direction DR1) of the can body V. The higher the flatness, the closer the angle of the can body V with respect to the longitudinal direction (first direction DR1) is to 90 degrees. The flatness of the first connecting portion C11 and the first standing portion H11 is important for joining the body B and the first end plate H1. Further, the first straightening ring 512 is configured so that the side surface of the first straightening ring 512 comes into contact with the side surface of the first tubular portion H12 of the first end plate H1. The central axis of the first straightening ring 512 coincides with the central axis of the can body V.

The first annular portion 513 surrounds the first orthodontic ring 512. The first annular portion 513 is configured so that the body B does not come into contact with the tip of the first large diameter portion C21 when the body B is abutted against the first end plate H1.

The first peripheral wall portion 514 surrounds the first annular portion 513. The first peripheral wall portion 514 has a cylindrical shape. The first peripheral wall portion 514 is connected to the first straightening ring 512 by the first annular portion 513. The inner diameter of the first peripheral wall portion 514 is larger than that of the first large diameter portion C21 of the body B. Therefore, the first peripheral wall portion 514 is configured so that the body B can be inserted.

The first tapered portion 515 is connected to the first peripheral wall portion 514 on the side opposite to the first bottom plate 511 with respect to the first peripheral wall portion 514. The first tapered portion 515 is configured such that the inner diameter of the first tapered portion 515 increases from the root side to the tip side of the first tapered portion 515. Therefore, the first large diameter portion C21 of the body B is easily inserted into the first tapered portion 515. The first tapered portion 515 is configured to guide the first large diameter portion C21 of the body B toward the first bottom plate 511.

The first straightening ring 512, the first annular portion 513, and the first peripheral wall portion 514 are connected to the first support plate 516. Further, the first guide 518 and the first cylinder 517 are connected to the first support plate 516. The first straightening ring 512, the first annular portion 513, and the first peripheral wall portion 514 sandwich the first support plate 516 between the first guide 518 and the first cylinder 517.

The first cylinder 517 is fixed to the first bottom plate 511. As shown in FIG. 7, the first cylinder 517 is configured to move the first support plate 516 along the first direction DR1. As a result, the first straightening ring 512, the first annular portion 513, and the first peripheral wall portion 514 connected to the first support plate 516 are movable along the first direction DR1. Specifically, the first cylinder 517 is configured to move the first support plate 516 away from the second straightening jig 52 along the first direction DR1. The first cylinder 517 can be controlled by a signal of the control unit CU (see FIG. 1). The first guide 518 is fixed to the first bottom plate 511.

The first compression spring 519 surrounds the first guide 518. Due to the spring force of the first compression spring 519, a force in a direction approaching the body B acts on the first support plate 516. The position of the tip of the first compression spring 519 in the first direction DR1 is the same as the position of the tip of the first cylinder 517 in the non-moving state in the first direction DR1. As shown in FIG. 8, the first orthodontic jig 51 may include a plurality of first cylinders 517. Note that, in FIG. 8, for convenience of explanation, the first compression spring 519 is not shown.

As shown in FIG. 6, the second straightening jig 52 is configured to support the second end plate H2 on the side opposite to the first straightening jig 51 with respect to the grip portion 3. The second straightening jig 52 is arranged so as to face the first straightening jig 51. It is desirable that the second straightening jig 52 has the same configuration as the first straightening jig 51, except that the second straightening jig 52 is arranged so as to face the first straightening jig 51. The second straightening jig 52 can hold the second end plate H2 inserted in the second straightening jig 52. The detailed configuration for the second straightening jig 52 to hold the second end plate H2 will be described later.

The inner circumference of the second straightening jig 52 has a shape along the second semi-cylindrical portion B2 of the body B. In the present embodiment, the inner circumference of the second straightening jig 52 is configured as an inner wall of a cylinder. The diameter (inner diameter) of the inner circumference of the second straightening jig 52 is equal to or larger than the outer diameter of the body B. In the present embodiment, the diameter (inner diameter) of the inner circumference of the second straightening jig 52 is larger than the outer diameter of the body B.

The grip portion 3 is configured so that the body B is abutted against the second end plate H2 in a state where the second semi-cylindrical portion B2 is in contact with the inner circumference of the second straightening jig 52. The grip portion 3 is configured to abut the body B against the second end plate H2 in a state where the second semi-cylindrical portion B2 is straightened along the inner circumference of the second straightening jig 52. The first semi-cylindrical portion B1 is arranged away from the inner circumference of the second straightening jig 52 in a state where the second semi-cylindrical portion B2 is in contact with the inner circumference of the second straightening jig 52.

The second straightening jig 52 includes a second bottom plate 521, a second straightening ring 522, a second annular portion 523, a second peripheral wall portion 524, a second tapered portion 525, a second support plate 526, and a second straightening jig 52. It has two cylinders 527, a second guide 528, and a second compression spring 529.

The second bottom plate 521 is configured to receive the bottom surface of the second cup portion H23 of the second end plate H2. The second bottom plate 521 is configured to come into contact with the second cup portion H23 at the contact surface of the second bottom plate 521. The contact surface has a shape that follows the shape of the second cup portion H23. The contact surface has a sufficient area for pressurizing the second cup portion H23. When the first straightening jig 51 and the second straightening jig 52 approach each other in a state where the contact surface is in contact with the second cup portion H23, the first end plate H1, the second end plate H2, and the body B are pressurized.

The second straightening ring 522 is configured so that the second tubular portion H22 and the second cup portion H23 of the second end plate H2 can be inserted. The second straightening ring 522 has a cylindrical shape. The second straightening ring 522 is configured to engage the second upright portion H21 of the second end plate H2. The second straightening ring 522 is configured to come into contact with the back surface of the second upright portion H21 of the second end plate H2 and the side surface of the second tubular portion H22. Specifically, the second straightening ring 522 is configured such that the tip surface of the second straightening ring 522 comes into contact with the back surface of the second upright portion H21 of the second mirror surface. The tip surface of the second straightening ring 522 is configured to sandwich the second upright portion H21 of the second end plate H2 with the second connecting portion C12 of the body B. The tip surface of the second straightening ring 522 is configured to be orthogonal to the longitudinal direction of the can body V (first direction DR1). As a result, the flatness of the second connecting portion C12 and the second standing portion H21, which are the joint portions between the body B and the second end plate H2, is improved. The flatness of the second connecting portion C12 and the second standing portion H21 is important for joining the body B and the second end plate H2. Further, the second straightening ring 522 is configured so that the side surface of the second straightening ring 522 comes into contact with the side surface of the second tubular portion H22 of the second end plate H2. The central axis of the second straightening ring 522 coincides with the central axis of the can body V.

The second annular portion 523 surrounds the second orthodontic ring 522. The second annular portion 523 is configured so as not to come into contact with the tip of the second large diameter portion C22 when the body B is abutted against the second end plate H2.

The second peripheral wall portion 524 surrounds the second annular portion 523. The second peripheral wall portion 524 has a cylindrical shape. The second peripheral wall portion 524 is connected to the second straightening ring 522 by the second annular portion 523. The inner diameter of the second peripheral wall portion 524 is larger than that of the second large diameter portion C22 of the body B. Therefore, the second peripheral wall portion 524 is configured so that the body B can be inserted.

The second tapered portion 525 is connected to the second peripheral wall portion 524 on the side opposite to the second bottom plate 521 with respect to the second peripheral wall portion 524. The second tapered portion 525 is configured such that the inner diameter of the second tapered portion 525 increases from the root side to the tip side of the second tapered portion 525. Therefore, the second large diameter portion C22 of the body B is easily inserted into the second tapered portion 525. The second tapered portion 525 is configured to guide the second large diameter portion C22 of the body B toward the second bottom plate 521.

The second straightening ring 522, the second annular portion 523 and the second peripheral wall portion 524 are connected to the second support plate 526. Further, the second guide 528 and the second cylinder 527 are connected to the second support plate 526. The second straightening ring 522, the second annular portion 523, and the second peripheral wall portion 524 sandwich the second support plate 526 with the second guide 528 and the second cylinder 527.

The second cylinder 527 is fixed to the second bottom plate 521. As shown in FIG. 7, the second cylinder 527 is configured to move the second support plate 526 along the first direction DR1. As a result, the second straightening ring 522, the second annular portion 523, and the second peripheral wall portion 524 connected to the second support plate 526 can move along the first direction DR1. Specifically, the second cylinder 527 is configured to move the second support plate 526 away from the second straightening jig 52 along the first direction DR1. The second cylinder 527 can be controlled by the signal of the control unit CU (see FIG. 1). The second guide 528 is fixed to the second bottom plate 521.

The second compression spring 529 surrounds the second guide 528. Due to the spring force of the second compression spring 529, a force in a direction approaching the body B acts on the second support plate 526. The position of the tip of the second compression spring 529 in the first direction DR1 is the same as the position of the tip of the second cylinder 527 in the non-moving state in the first direction DR1. As shown in FIG. 9, the second straightening jig 52 may include a plurality of second cylinders 527. Note that the second compression spring 529 is not shown in FIG. 9 for convenience of explanation.

As shown in FIGS. 1, 4 and 7, the pressurizing unit 6 is configured to move the second straightening jig 52 along the first direction DR1. The pressurizing unit 6 is sandwiched between the first straightening jig 51 and the second straightening jig 52 by moving the second straightening jig 52 toward the first straightening jig 51 along the first direction DR1. It is configured to pressurize the can body V. The pressurizing unit 6 is connected to the second straightening jig 52 via the rotation driven portion 75 and the second shaft 77. The pressurizing unit 6 includes, for example, a drive mechanism such as a servomotor. The control unit CU is configured to control the pressurization by the pressurizing unit 6. Specifically, the control unit CU is configured to control pressurization according to the load torque of the servomotor or the like and the position of the second straightening jig 52.

As shown in FIG. 1, the rotation drive unit 71 and the rotation driven unit 75 are arranged so as to sandwich the first correction jig 51 and the second correction jig 52. The rotation drive unit 71 is arranged on the side opposite to the support unit 2 with respect to the first straightening jig 51. The rotation driven portion 75 is arranged on the side opposite to the support portion 2 with respect to the second straightening jig 52.

The rotation drive unit 71 is connected to the first straightening jig 51 by the first shaft 72. The rotary drive unit 71 is connected to the motor 74 by a gear 73. The motor 74 is configured to rotate the rotary drive unit 71. The rotation of the rotation drive unit 71 is transmitted to the first straightening jig 51 by the first shaft 72, so that the first straightening jig 51 and the can body V rotate.

The rotation driven unit 75 is configured to rotate by rotating the rotation driving unit 71. The rotation drive unit 71, the rotation driven unit 75, and the can body V are arranged so that the rotation axis of the rotation drive unit 71, the rotation axis of the rotation driven unit 75, and the central axis of the can body V are arranged on the same straight line. It is desirable to be there.

The rotation driven portion 75 is connected to the second straightening jig 52 by the second shaft 77. The rotation driven portion 75 is connected to the pressurizing unit 6.

As shown in FIG. 10, the welding machine 8 is configured to weld the first end plate H1 and the second end plate H2 to the body B. The welding machine 8 is configured to weld the first end plate H1 and the second end plate H2 to the body B by, for example, TIG (Tungsten Inert Gas) welding. The welding machine 8 is configured to weld the body B and the first end plate H1 in a state where the first end plate H1 is exposed from the first straightening jig 51. The welding machine 8 is configured to weld the body B and the second end plate H2 in a state where the second end plate H2 is exposed from the second straightening jig 52.

The welding torch 81 of the welding machine 8 is arranged above the first large diameter portion C21 and the second large diameter portion C22 of the body B. The welding machine 8 is configured to weld the first end plate H1 and the second end plate H2 over the entire circumference of the body B while the can body V is rotated by the rotation drive unit 71.

As shown in FIGS. 2, 3 and 11, in the present embodiment, the grip portion 3 is configured to grip the body B by vacuum suction by a plurality of vacuum pads 38. The plurality of vacuum pads 38 are embedded in the semicircle portion 35 along the circumferential direction of the semicircle portion 35. Each of the plurality of vacuum pads 38 is arranged at a distance from each other. The tip of each of the plurality of vacuum pads 38 may be embedded in the semicircular portion 35 or may protrude from the semicircular portion 35. When the tip of each of the plurality of vacuum pads 38 protrudes from the semicircular portion 35, the vacuum pad 38 is compressed outward in the radial direction of the semicircular portion 35. As a result, the body B is deformed along the semicircular portion 35. The inner wall surface IS of the semicircular portion 35 has a semicircular shape.

When the body B has magnetism, as shown in FIG. 12, the grip portion 3 may be configured to grip the body B by the electromagnetic force of a plurality of electromagnets 39. Further, a plurality of vacuum pads 38 and a plurality of electromagnets 39 may be combined.

When a plurality of electromagnets 39 are used, the tips of the plurality of electromagnets 39 may be embedded inside the semicircle portion 35 or may be embedded inside the semicircle portion 35. Desirably, the tip of each of the plurality of electromagnets 39 is arranged at a position 0.1 mm inside the inner circumference of the semicircular portion 35.

Next, the operation of the can body manufacturing apparatus 100 according to the first embodiment will be described with reference to FIGS. 1 to 15.

The method for manufacturing a can body is a method for manufacturing a can body for manufacturing a can body V. As shown in FIG. 13, the method for manufacturing a can body includes a step S101 for being gripped and a step S102 for the body B to be abutted against the first end plate H1.

In the gripping step S101 (see FIG. 13), as shown in FIG. 4, each of the first end plate H1 and the second end plate H2 is inserted into each of the first orthodontic jig 51 and the second orthodontic jig 52, respectively. Will be done. The first end plate H1 is arranged so that the first bottom plate 511 and the first cup portion H13 are spaced apart from each other by, for example, 1 mm. Further, the first end plate H1 is arranged so that the first standing portion H11 and the first tubular portion H12 come into contact with the first straightening ring 512 without a gap. The second end plate H2 is arranged so that the second bottom plate 521 and the second cup portion H23 are spaced apart from each other by, for example, 1 mm. Further, the second end plate H2 is arranged so that the second upright portion H21 and the second tubular portion H22 come into contact with the second straightening ring 522 without a gap.

Subsequently, the body B is supported by the support portion 2. Specifically, the second semi-cylindrical portion B2 of the body B is supported by the support portion 2. As shown in FIG. 14, the fuselage B supported by the support portion 2 bends due to gravity. As a result, the body B is deformed from a circular shape to an elliptical shape in a lateral view. The deformation of the fuselage B occurs because the fuselage B is made of a material having a thin plate thickness. Further, the deformation of the body B is caused by the fact that the entire circumference of the body B is not restrained. In FIG. 14, the outer shape of the body B in the undeformed state is illustrated by a two-dot chain line.

Subsequently, as shown in FIG. 3, the grip portion 3 approaches the fuselage B by descending from above the fuselage B supported by the support portion 2. The grip portion 3 is moved by the height position drive portion 44 (see FIG. 1) of the holding unit 4. As shown in FIGS. 14 and 15, the grip portion 3 is inserted so that the first semi-cylindrical portion B1 of the body B bent between the first extension portion 36 and the second extension portion 37 of the grip portion 3 is inserted. Will descend. As the body B is inserted into the grip portion 3, the deflection of the body B is corrected. The descent of the grip portion 3 stops at a position where the first semi-cylindrical portion B1 comes into contact with the semicircular portion 35.

Subsequently, the first semi-cylindrical portion B1 is gripped by being attracted to the grip portion 3. Specifically, as shown in FIG. 3, the vacuum pad 38 (see FIG. 11) of the grip portion 3 attracts the first semi-cylindrical portion B1. The first semi-cylindrical portion B1 of the body B is straightened along the semicircular portion 35. That is, the first semi-cylindrical portion B1 of the body B is deformed along the semicircular portion 35. Further, the height position of the grip portion 3 is adjusted by the height position drive portion 44. That is, the grip portion 3 is lifted by the height position drive portion 44. From the above, the body B in the side view is restrained by the support portion 2 supporting the second semi-cylindrical portion B2 of the body B and the grip portion 3 supporting the first semi-cylindrical portion B1 of the body B. The shape approaches a circle.

If the grip portion 3 and the body B are misaligned, the position of the grip portion 3 may be adjusted in advance by the height position adjusting stage 42 and the horizontal position adjusting stage 43. As a result, the grip portion 3 can accurately grip the body B.

Subsequently, as shown in FIGS. 4 to 6, the body B is moved toward the first straightening jig 51 along the first direction DR1 by the horizontal position driving unit 45. As a result, the first connecting portion C11 of the body B comes into contact with the first standing portion H11 of the first end plate H1 supported by the first straightening jig 51. In this state, the restraint of the second semi-cylindrical portion B2 is insufficient because it is restrained only by two points of the support portion 2. Therefore, the second semi-cylindrical portion B2 may be bent so as to bulge downward.

In the butting step S102, the body B is inserted into the first straightening jig 51, so that the body B is in contact with the inner circumference of the first straightening jig 51 in a state where the second semi-cylindrical portion B2 of the body B is in contact with the inner circumference of the first straightening jig 51. 1 It is abutted against the end plate H1. Specifically, when the body B is abutted against the first end plate H1, the body B is inserted along the first tapered portion 515 of the first straightening jig 51. As a result, the second semi-cylindrical portion B2 is deformed along the first peripheral wall portion 514, so that the shape of the second semi-cylindrical portion B2 becomes closer to a circular shape. Further, the first standing portion H11 and the first connecting portion C11 come into contact with each other over the entire circumference.

Subsequently, by operating the pressurizing unit 6, the second straightening jig 52 moves toward the body B along the first direction DR1. The second straightening jig 52 abuts the second end plate H2 held by the second straightening jig 52 against the body B. When the body B is abutted against the second end plate H2, the body B is inserted along the second tapered portion 525 of the second straightening jig 52. As a result, the second semi-cylindrical portion B2 is deformed along the second peripheral wall portion 524, so that the shape of the second semi-cylindrical portion B2 becomes closer to a circular shape. Further, the second standing portion H21 and the second connecting portion C12 come into contact with each other over the entire circumference. Further, the flatness between the first standing portion H11 and the first connecting portion C11 and the flatness between the second standing portion H21 and the second connecting portion C12 are improved. Improving the flatness is important in the post-process, for example, when joining by welding is performed.

Subsequently, the grip portion 3 stops the suction. As shown in FIGS. 4 and 10, the grip portion 3 that has stopped suction is raised by the height position drive portion 44, so that the grip portion 3 is removed from the body B. The grip portion 3 removed from the body B is retracted from above the first straightening jig 51 and the second straightening jig 52 by the horizontal position driving portion 45. As a result, it is possible to prevent the grip portion 3 from hindering the arrangement of the welding machine 8.

Subsequently, the pressurizing unit 6 operates. As a result, the first straightening jig 51 and the second straightening jig 52 pressurize the can body V by sandwiching the can body V in a state where the first end plate H1 and the second end plate H2 are in contact with the body B. The first straightening jig 51 and the second straightening jig 52 pressurize the can body V with the first pressing force. The first connection portion C11 and the second connection portion C12 of the body B are not deformed by the pressurization by the first pressing force. The pressurization by the first straightening jig 51 and the second straightening jig 52 is measured and controlled by the control unit CU (see FIG. 1). If the pressing force by the first straightening jig 51 and the second straightening jig 52 does not reach the first pressing force, there is a possibility that normal matching has not been performed. Therefore, after the positions of the first straightening jig 51, the second straightening jig 52, and the body B are corrected by the operator, the next step is carried out. Further, before the next step, the assembly work of the first straightening jig 51, the second straightening jig 52, and the body B may be redone.

After it is confirmed that the first pressing force normally acts on the first end plate H1 and the second end plate H2, the first correction ring 512 and the second correction ring 522 move away from each other. That is, the first straightening ring 512 and the second straightening ring 522 move away from the body B. As a result, a space in which the welding machine 8 can be arranged is formed above the first large diameter portion C21 and the second large diameter portion C22. In this state, since the can body V is pressurized by the first bottom plate 511 and the second bottom plate 521 with the first pressing force, the can body V, the first end plate H1 and the second end plate H2 are not deformed.

Further, the support portion 2 descends so as to be separated from the body B. Since the body B is pressurized by the first straightening jig 51 and the second straightening jig 52, the body B does not fall even when the support portion 2 is separated from the body B.

Subsequently, the pressurizing unit 6 operates. The first straightening jig 51 and the second straightening jig 52 pressurize the can body V with the second pressing force. As a result, the first connecting portion C11 and the first standing portion H11 are in close contact with each other. Further, the second connecting portion C12 and the second standing portion H21 are in close contact with each other. That is, the joint of the can body V is in close contact. The can body V is not deformed by the second pressing force. The pressing force applied to the can body V increases without deforming the can body V.

From the above, the pressurization of the can body V is completed.

Subsequently, as shown in FIG. 10, the welder 8 moves above the pressurized can body V. The welding machine 8 welds the body B to the first end plate H1 and the second end plate H2. Specifically, the welding machine 8 welds the first large diameter portion C21 of the body B and the first end plate H1. Further, the welding machine 8 welds the second large diameter portion C22 of the body B and the second end plate H2. This completes the welding of the can body V.

Subsequently, the grip portion 3 moves above the body B. The height position drive unit 44 lowers the grip portion 3 until it comes into contact with the body B. The grip portion 3 grips the body B by adsorbing it. The body B is integrated by being welded to the first end plate H1 and the second end plate H2. Subsequently, although not shown, the second straightening jig 52 is retracted by the operation of the pressurizing unit 6. The grip portion 3 that grips the body B is conveyed above the support portion 2 by the height position drive portion 44 and the horizontal position drive portion 45. As the support portion 2 rises, the support portion 2 supports the body B conveyed above the support portion 2. The grip portion 3 stops the suction of the body B. As a result, the can body V is removed from the grip portion 3. The grip portion 3 is moved away from above the support portion 2 by the height position drive portion 44 and the horizontal position drive portion 45.

From the above, the production of the can body V is completed.

Subsequently, the action and effect of the present embodiment will be described.

According to the can body manufacturing apparatus 100 according to the present embodiment, as shown in FIGS. 2 and 3, the gripping portion 3 grips the body B by adsorbing the first semi-cylindrical portion B1 of the body B. It is configured as follows. Further, the grip portion 3 has a semicircular shape along the first semi-cylindrical portion B1 of the body B. Therefore, when the first semi-cylindrical portion B1 comes into contact with the first straightening jig 51, it is possible to correct the distortion of the opening shape of the first semi-cylindrical portion B1. Further, the grip portion 3 is configured so that the body B is abutted against the first end plate H1 in a state where the second semi-cylindrical portion B2 is in contact with the inner circumference of the first straightening jig 51. Further, as shown in FIG. 5, the inner circumference of the first straightening jig 51 has a shape along the second semi-cylindrical portion B2 of the body B. Therefore, when the second semi-cylindrical portion B2 comes into contact with the first straightening jig 51, it is possible to correct the distortion of the opening shape of the second semi-cylindrical portion B2. Therefore, the distortion of the opening shape of the body B can be sufficiently corrected.

As shown in FIG. 3, the grip portion 3 is configured to grip the body B by adsorbing the first semi-cylindrical portion B1 of the body B. Therefore, the body B does not have to be gripped so as to be sandwiched by the plurality of grip portions 3. Furthermore, it is not necessary to use an additional jig for fixing the plurality of grip portions 3. Therefore, it is possible to suppress an increase in working time.

As shown in FIG. 3, the first end E1 and the second end E2 are the first end E1 and the second end along the direction in which the first end E1 and the second end E2 sandwich the body B. It is configured to widen the distance from the portion E2 toward the tip. Therefore, the body B of the can body V can be easily inserted between the first end portion E1 and the second end portion E2. Therefore, the increase in working time can be further suppressed.

As shown in FIG. 10, the first straightening jig 51 and the second straightening jig 52 sandwich the can body V in a state where the first end plate H1 and the second end plate H2 are in contact with the body B, thereby sandwiching the can body V. Is configured to pressurize. Therefore, the first end plate H1 and the second end plate H2 can hold the can body V in a state separated from the support portion 2 and the grip portion 3. Therefore, it is possible to prevent the support portion 2 and the grip portion 3 from limiting the arrangement position of the welding machine 8. Therefore, it is possible to suppress the limitation of welding conditions.

As shown in FIG. 6, the first straightening jig 51 and the second straightening jig 52 sandwich the can body V in a state where the first end plate H1 and the second end plate H2 are in contact with the body B, thereby sandwiching the can body V. Is configured to pressurize. Therefore, the work such as welding can be performed with the first end plate H1, the second end plate H2, and the body B integrated. Therefore, it is not necessary to attach a jig for holding the body B and to perform fixing work such as screwing. Therefore, it is possible to save labor in the process and improve work efficiency. Further, since the body B is restrained at the time of welding, tools and equipment are not required. Therefore, the heat of welding is not dissipated from the fuselage B to the tools and equipment for restraining the fuselage B. Therefore, it is possible to suppress a decrease in the amount of heat of the body B in welding due to the heat of welding being dissipated from the body B. Therefore, the quality of welding is improved.

As shown in FIG. 7, the first straightening jig 51 and the second straightening jig 52 have a state in which the can body V is pressed by the first pressing force and a state in which the can body V is pressed by the second pressing force. It is configured to be switchable. The second pressing force is larger than the first pressing force. Therefore, after the can body V is pressurized by the first pressing force, the can body V can be pressurized by the second pressing force. If the fitting is not performed normally during the pressurization with the first pressurization, the first pressurization is a weak pressurization, so that the opening shape of the body B is not deformed and the can body V The position can be corrected or the can body V can be reassembled. Therefore, after confirming that the can body V is fitted by the first pressing force, the can body V can be pressurized by the second pressing force. Therefore, it is possible to achieve both a reliable fitting of the can body V and a strong fitting.

According to the method for manufacturing a can body according to the present embodiment, as shown in FIGS. 2 and 3, the first semi-cylindrical portion B1 is gripped by being adsorbed by the grip portion 3. Further, the grip portion 3 has a semicircular shape along the first semi-cylindrical portion B1 of the body B. Therefore, when the first semi-cylindrical portion B1 comes into contact with the first straightening jig 51, it is possible to correct the distortion of the opening shape of the first semi-cylindrical portion B1. As shown in FIG. 5, by inserting the body B into the first straightening jig 51, the body B is in a state where the second semi-cylindrical portion B2 of the body B is in contact with the inner circumference of the first straightening jig 51. Is abutted against the first end plate H1. Further, the inner circumference of the first straightening jig 51 has a shape along the second semi-cylindrical portion B2 of the body B. Therefore, when the second semi-cylindrical portion B2 comes into contact with the first straightening jig 51, it is possible to correct the distortion of the opening shape of the second semi-cylindrical portion B2. Therefore, the distortion of the opening shape of the body B can be sufficiently corrected.

As shown in FIGS. 2 and 3, the first semi-cylindrical portion B1 is gripped by being adsorbed by the grip portion 3. Therefore, the body B does not have to be gripped so as to be sandwiched by the plurality of grip portions 3. Furthermore, it is not necessary to use an additional jig for fixing the plurality of grip portions 3. Therefore, it is possible to suppress an increase in working time.

Embodiment 2.
Next, the configuration of the can body manufacturing apparatus 100 according to the second embodiment will be described with reference to FIGS. 16 to 18. Unless otherwise specified, the second embodiment has the same configuration, manufacturing method, and action and effect as those of the first embodiment. Therefore, the same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will not be repeated.

As shown in FIG. 16, the can body manufacturing apparatus 100 according to the present embodiment further includes a vibration unit 9. The vibrating portion 9 is configured to vibrate the body B. In the present embodiment, the can body manufacturing apparatus 100 includes four vibrating portions 9. The four vibrating portions 9 are arranged on both sides of the center of the body B along the first direction DR1. Further, as shown in FIG. 17, the four vibrating portions 9 are arranged so as to sandwich the body B along the third direction DR3.

As shown in FIG. 16, in the present embodiment, the vibration unit 9 includes a suction pad 91, a vibration source 92, a first stage 93, and a second stage 94. The suction pad 91 is configured to be suctioned to the body B. The suction pad 91 is connected to a negative pressure generator (not shown) such as a vacuum ejector. When a negative pressure generator (not shown) is activated, the suction pad 91 is configured to be sucked to the body B by vacuum suction. The vibration source 92 is connected to the suction pad 91. The vibration source 92 is, for example, a vibration motor, a pneumatic vibrator, or the like. The first stage 93 is movable along the first direction DR1. The second stage 94 is movable along the third direction DR3.

The vibrating unit 9 is configured to move in synchronization with the movement of the horizontal drive unit of the holding unit 4. Therefore, even when the vibrating portion 9 is fixed to the body B, it is possible to prevent the body B and the vibrating portion 9 from being displaced from each other. Therefore, it is possible to prevent the suction pad 91 from coming off from the body B.

In addition, in FIGS. 16 and 17, the vibrating portion 9 is arranged on the side surface of the body B, but may be arranged at any position as long as it comes into contact with the body B.

Next, a method for manufacturing a can body according to the second embodiment will be described with reference to FIGS. 16 and 17. The part different from the first embodiment will be described.

First, as shown in FIGS. 16 and 17, the grip portion 3 grips the body B. Subsequently, the suction pad 91 of the vibrating portion 9 comes into contact with the body B so as to sandwich the body B gripped by the grip portion 3. The vibration source 92 of the vibrating unit 9 vibrates the body B. The body B is slightly deformed by the vibration generated by the vibration source 92. The body B is abutted against the first end plate H1 in a state of being vibrated by the vibrating portion 9. Specifically, the first upright portion H11 (see FIG. 6) is inserted into the first large diameter portion C21 (see FIG. 6). In the present embodiment, the first standing portion H11 (see FIG. 6) is inserted into the first large diameter portion C21 (see FIG. 6) in a state where the first large diameter portion C21 (see FIG. 6) is slightly deformed. Will be done. The amount of movement of the grip portion 3 and the vibrating portion 9 along the first direction DR1 is the same because the horizontal position drive portion 45 and the first stage 93 are synchronized. After the first upright portion H11 (see FIG. 6) is inserted into the first large diameter portion C21 (see FIG. 6), the vibration by the vibrating portion 9 is stopped.

Subsequently, the vibration source 92 of the vibrating unit 9 vibrates the body B. The body B is abutted against the second end plate H2 in a state of being vibrated by the vibrating portion 9. Specifically, the second upright portion H21 (see FIG. 6) is inserted into the second large diameter portion C22 (see FIG. 6). After the second upright portion H21 (see FIG. 6) is inserted into the second large diameter portion C22 (see FIG. 6), the vibration by the vibrating portion 9 is stopped.

Subsequently, the action and effect of the present embodiment will be described.

According to the can body manufacturing apparatus 100 according to the present embodiment, as shown in FIG. 16, the vibrating unit 9 is configured to vibrate the body B. As a result, when the first upright portion H11 of the first end plate H1 is inserted into the first large diameter portion C21 of the body B, the body B can be slightly deformed.

If there are variations in the diameter dimensions of the body B and the first end plate H1, as shown in FIG. 18, the tip of the first large diameter portion C21 and the tip of the first upright portion H11 come into contact with each other. The first upright portion H11 may not be inserted into the first large diameter portion C21.

On the other hand, in the present embodiment, even when the first large-diameter portion C21 and the first upright portion H11 come into contact with each other, the body B is slightly deformed so that the first large-diameter portion C21 stands up first. The portion H11 is inserted. Further, it is possible to prevent the tip of the first large diameter portion C21 from coming into contact with the tip of the first upright portion H11. Therefore, the first upright portion H11 can be easily inserted into the first large diameter portion C21. That is, it is possible to reliably abut the body B and the first end plate H1. Similarly, the body B and the second end plate H2 can be reliably butted against each other. This improves the productivity of manufacturing the can body V.

According to the method for manufacturing a can body according to the present embodiment, as shown in FIG. 16, the body B is abutted against the first end plate H1 in a state of being vibrated by the vibrating unit 9. As a result, the body B and the first end plate H1 can be reliably abutted against each other. Similarly, the body B and the second end plate H2 can be reliably butted against each other. Therefore, the productivity of manufacturing the can body V is improved.

It should be considered that the embodiments disclosed this time are exemplary in all respects and not restrictive. The scope of the present disclosure is shown by the scope of claims rather than the above description, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

3 Grip part, 51 1st straightening jig, 52 2nd straightening jig, 100 can body manufacturing equipment, B body, B1 1st semi-cylindrical part, B2 2nd semi-cylindrical part, E1 1st end, E2 2nd End, H1 1st end plate, H2 2nd end plate, V can body.

Claims (7)

A can body manufacturing apparatus for manufacturing a can body including a body having a first semi-cylindrical portion and a second semi-cylindrical portion facing the first semi-cylindrical portion, and a first end plate joined to the body. ,
A grip portion having a semicircular shape along the first semi-cylindrical portion of the body,
A first orthodontic jig capable of inserting the body and the first end plate and holding the first end plate is provided.
The inner circumference of the first straightening jig has a shape along the second semi-cylindrical portion of the body.
The grip portion is configured to grip the body by adsorbing the first semi-cylindrical portion of the body, and the second semi-cylindrical portion is the inner circumference of the first straightening jig. A can body manufacturing apparatus configured to abut the body against the first end plate in contact with the first end plate. The grip portion has a first end portion and a second end portion arranged so as to sandwich the body along the radial direction of the body.
The first end portion and the second end portion have the distance between the first end portion and the second end portion along the direction in which the first end portion and the second end portion sandwich the body. The can body manufacturing apparatus according to claim 1, which is configured to spread toward the can body. With more vibrating parts,
The can body manufacturing apparatus according to claim 1 or 2, wherein the vibrating portion is configured to vibrate the body. The can body further includes a second end plate arranged so as to sandwich the body with the first end plate.
A second straightening jig configured to support the second end plate on the side opposite to the first straightening jig with respect to the grip portion is further provided.
The first straightening jig and the second straightening jig are configured to pressurize the can body by sandwiching the can body in a state where the first end plate and the second end plate are in contact with the body. The can body manufacturing apparatus according to any one of claims 1 to 3. The first straightening jig and the second straightening jig are configured to be able to switch between a state in which the can body is pressurized by the first pressing force and a state in which the can body is pressed by the second pressing force.
The can body manufacturing apparatus according to claim 4, wherein the second pressing force is larger than the first pressing force. A method for manufacturing a can body including a body having a first semi-cylindrical portion and a second semi-cylindrical portion facing the first semi-cylindrical portion, and a first end plate joined to the body. hand,
A step of gripping the first semi-cylindrical portion by being adsorbed by a grip portion having a semicircular shape along the first semi-cylindrical portion.
The second half of the body is formed by inserting the body into a first correction jig that holds the first end plate of the can body and has an inner circumference that is shaped along the second semi-cylindrical portion. A method for manufacturing a can body, comprising a step of abutting the body against the first end plate in a state where the cylindrical portion is in contact with the inner circumference of the first straightening jig. The method for manufacturing a can body according to claim 6, wherein the body is abutted against the first end plate in a state of being vibrated by a vibrating portion.

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